(19)
(11)EP 3 405 440 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
09.09.2020 Bulletin 2020/37

(21)Application number: 17703490.7

(22)Date of filing:  10.01.2017
(51)International Patent Classification (IPC): 
C03B 37/16(2006.01)
B26D 1/40(2006.01)
D01G 1/04(2006.01)
B26D 7/20(2006.01)
(86)International application number:
PCT/US2017/012789
(87)International publication number:
WO 2017/127254 (27.07.2017 Gazette  2017/30)

(54)

CHOPPER ASSEMBLY FOR AND METHOD OF MANUFACTURING CHOPPED FIBERS

HÄCKSLERBAUGRUPPE SOWIE VERFAHREN ZUR HERSTELLUNG VON SCHNITTFASERN

HACHEUR DE FIBRES ET PROCÉDÉ DE FABRICATION DE FIBRES HACHÉES


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 19.01.2016 US 201662280279 P

(43)Date of publication of application:
28.11.2018 Bulletin 2018/48

(73)Proprietor: OCV Intellectual Capital, LLC
Toledo, OH 43659 (US)

(72)Inventors:
  • FAZIO, Michael B.
    Newark OH 43055 (US)
  • MELICK, David D.
    Centerburg OH 43011 (US)

(74)Representative: Cabinet Beau de Loménie 
158, rue de l'Université
75340 Paris Cedex 07
75340 Paris Cedex 07 (FR)


(56)References cited: : 
EP-A1- 1 808 515
US-A- 3 644 109
US-A1- 2010 183 759
FR-A1- 2 350 932
US-A- 4 045 196
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    CROSS REFERENCE TO RELATED APPLICATIONS


    FIELD



    [0001] The inventive concepts relate generally to an assembly for and a method of manufacturing chopped fibers, and, more particularly, to an assembly for and method of manufacturing chopped fibers that includes a retaining device that resists the separation of a hub mounted elastomeric ring from the hub at high speeds.

    BACKGROUND



    [0002] Glass fibers are used in a wide variety of applications. For example, discrete segments of glass fiber strands, or "chopped strand," can be randomly laid across each other and held together by a binder to form a chopped strand mat that can be used as a reinforcing material in many applications. Chopped strand is typically manufactured by using a chopping assembly including a chopper wheel or roller that contains a plurality of blades that contact a drive or driven wheel or roller having a hard, elastomeric exterior surface that the blades contact. Continuous glass fibers that are drawn between the wheels are cut to form the chopped strand. Patent related documents include EP 1 808 515 which relates to a fiber chopper and method and US 3 644 109 which relates to an apparatus for severing linear material.

    SUMMARY



    [0003] The general inventive concepts contemplate an assembly for and a method of manufacturing chopped fibers.

    [0004] According to the invention, an assembly for chopping glass fibers includes a cutter wheel having a plurality of radially extending blades and a cot wheel adjacent the cutter wheel. The cot wheel includes an inner hub, an elastomeric ring mounted onto the inner hub for rotation therewith, and a retaining device fixably attached to the hub, the retaining device including a projection that indents or projects into the elastomeric ring to resist separation of the elastomeric ring from the hub during rotation of the cot wheel.

    [0005] The invention also relates to a method of cutting glass fibers as defined in independent claim 11.

    [0006] Other aspects, advantages, and features of the general inventive concepts will become apparent to those skilled in the art from the following detailed description, when read in light of the accompanying drawings.

    BRIEF DESCRIPTION OF THE DRAWINGS



    [0007] For a fuller understanding of the nature and advantages of the general inventive concepts, reference should be had to the following detailed description taken in connection with the accompanying drawings, in which:

    FIG. 1 is a schematic representation of an assembly for manufacturing chopped fibers;

    FIG. 2 is a perspective view of the cot wheel of the assembly of FIG. 1;

    FIG. 3 is a front view of an exemplary embodiment of an inner hub of the assembly of FIG. 1;

    FIG. 4 is a cross-section view of the inner hub of FIG. 4 along line 4-4;

    FIG. 5 is a perspective view of an exemplary embodiment of an elastomeric ring of the assembly of FIG. 1;

    FIG. 6 is a cross-section view of the elastomeric ring of FIG. 5 along line 6-6;

    FIG. 7 is a front view of an exemplary embodiment of a retaining member of the assembly of FIG. 1;

    FIG. 8 is a cross-section view of the retaining member of FIG. 7 along line 8-8;

    FIG. 9 is a partial cross-section view of the assembly of FIG. 1 along line 9-9;

    FIG. 10 is a partial cross-section view of an exemplary embodiment of a retaining member of the assembly of FIG. 1;

    FIG. 11 is a partial cross-section view of an exemplary embodiment of a retaining member of the assembly of FIG. 1;

    FIG. 12 is a partial cross-section view of an exemplary embodiment of a retaining member of the assembly of FIG. 1; and

    FIG. 13 is a partial cross-section view of an exemplary embodiment of a retaining member of the assembly of FIG. 1.


    DETAILED DESCRIPTION



    [0008] While the general inventive concepts are susceptible of embodiment in many different forms, there are shown in the drawings, and will be described herein in detail, specific embodiments thereof with the understanding that the present disclosure is to be considered as an exemplification of the principles of the general inventive concepts. Accordingly, the general inventive concepts are not intended to be limited to the specific embodiments illustrated herein.

    [0009] Unless otherwise defined, the terms used herein have the same meaning as commonly understood by one of ordinary skill in the art encompassing the general inventive concepts. The terminology used herein is for describing exemplary embodiments of the general inventive concepts only and is not intended to be limiting of the general inventive concepts. As used in the description of the general inventive concepts and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

    [0010] Referring now to the drawings, FIG. 1 is a partial schematic illustration of an exemplary embodiment of an assembly 100 for manufacturing discrete segments of glass fiber, or "chopped strand." The assembly 100 may be configured in a variety of ways. For example, the assembly 100 may include various components, such as one or more glass fiber feeders, sizing application systems, various guides, pulleys, and rollers, which may be oriented in any suitable manner. For example, the components may be oriented in a manner that is know in the art, such as for example, as is set forth in U.S. Patent No. 4,194,896, U.S. Patent No. 4,411,180, and U.S. Patent No. 6,415,997.

    [0011] In the illustrated embodiment, a plurality of continuous glass fibers 102 are drawn from one or more feeders 104 around a guide roll 106 and an idler roll 108. FIG. 1 illustrates a single feeder 104, but any number of feeders may be incorporated in the assembly 100. The guide roll 106 and the idler roll 108 are configured and positioned to arrange the fibers 102 in a generally planar orientation and bring the fibers 102 into engagement with a circumferential surface 110 of a first rotatable member or cot wheel 112.

    [0012] As illustrated in FIG. 1, the cot wheel 112 is driven in a clockwise direction, as shown by arrow C, which pulls the fibers around the circumferential surface 110 of the cot wheel 112 to a position in which a second rotatable member or cutter wheel 114 is in contact with the cot wheel 112. As illustrated, the cutter wheel 114 rotates in a counterclockwise direction as shown by the arrow E. The cutter wheel 114 includes a plurality of radially extending blades 116 which contact the circumferential surface 110 of the cot wheel 112 to cut the fibers 102 into discrete segments 120.

    [0013] Referring to FIG. 2, the cot wheel 112 may be configured in a variety of ways. In the exemplary embodiment, the cot wheel 112 has a width W1, a diameter D1, and includes an inner hub 122, an outer elastomeric ring 124 mounted onto the inner hub for rotation therewith along a central longitudinal axis A, and a retaining device 126 for resisting separation of the elastomeric ring from the hub at high speeds.

    [0014] Referring to FIGS. 3-4, the inner hub 122 may be configured in a variety of ways. In the illustrated embodiment, the inner hub 122 is an annular member made from any suitable material. In one exemplary embodiment, the inner hub 122 is formed from a lightweight metal, such as for example, aluminum. The inner hub 122 has an inner diameter D2, an outer diameter D3, a width W2, an outer circumferential surface 130, and an inner circumferential surface 132 generally parallel to the outer circumferential surface. In some embodiments, the hub outer diameter D3 is in the range of about 400 mm to about 700 mm. In other embodiments, however, the hub outer diameter D3 may be less than 400 mm or greater than 700 mm.

    [0015] The inner hub 122 has a first end 134 and a second end 136 opposite the first end. The inner hub 122 includes a mounting surface 140 adjacent the first end 134 to facilitate mounting the inner hub 122 to a drive member (not shown), such as for example, a drive shaft, for rotation about the central longitudinal axis A. The mounting surface 140 may be configured in a variety of ways. In the illustrated embodiment, the mounting surface 140 includes an annular ridge 142 extending inward from the inner surface 132 of the inner hub 122. In the exemplary embodiment, the ridge 142 includes a plurality of threaded fastener bores 144 for receiving fasteners for attaching the drive member (not shown) to the inner hub 122. In other embodiments, however, the inner hub 122 may mount to the drive member (not shown) in any suitable manner. In the illustrated embodiment, the ridge 142 includes four fastener bores 144. In other embodiments, however, the ridge 142 may include more or less than four fastener bores 144.

    [0016] The first end 134 of the inner hub 122 includes a first annular face 146. In the illustrated embodiment, the first annular face 146 is generally perpendicular to the outer circumferential surface 130. The first annular face 146 includes a plurality of fastener bores 148 for receiving fasteners for attaching the retaining device 126 to the inner hub 122. In other embodiments, however, the retaining device 126 may mount to the inner hub 122 in any suitable manner. In the illustrated embodiment, first annular face 146 includes eight fastener bores 148. In other embodiments, however, the first annular face 146 may include more or less than eight fastener bores 148.

    [0017] The second end 136 of the inner hub 122 includes a second annular face 150. In the illustrated embodiment, the second annular face 150 is generally perpendicular to the outer circumferential surface 130. The second annular face 150 includes a plurality of fastener bores 152 for receiving fasteners for attaching the retaining device 126 to the inner hub 122. In other embodiments, however, the retaining device 126 may mount to the inner hub 122 in any suitable manner. In the illustrated embodiment, the second annular face 150 includes eight fastener bores 152. In other embodiments, however, the second annular face 150 may include more or less than eight fastener bores 152.

    [0018] Referring to FIGS. 5-6, the elastomeric ring 124 may be configured in a variety of ways. For example, the elastomeric material(s) used, the number of different elastomeric materials used, and the thickness of the ring, may vary in different embodiments. Any configuration that allows the elastomeric ring 124 to mount onto the inner hub 122 for rotation therewith and define the outer circumferential surface 110 of the cot wheel 112 may be used. In the illustrated embodiment, the elastomeric ring 124 has an inner diameter D4, an outer diameter D5 which defines the cot wheel diameter D1, a width W3, an outer circumferential surface 156 which defines the circumferential surface 110 of the cot wheel 112, and an inner surface 158 generally parallel to the outer circumferential surface 156. The elastomeric ring 124 has a first end 160 with a first annular face 162 and a second end 164 with a second annular face 166 opposite and generally parallel to the first annular face 162.

    [0019] The elastomeric ring 124 may be made of any suitable elastomeric material or materials. Suitable elastomeric materials include, but are not limited to rubber and polyurethane. A polyurethane, if used, may be made from any suitable diisocyanates (e.g., methylene diphenyl diisocyanate (MDI), toluene diisocyanate (TDI), 1,5-naphthalene diisocyanate (NDI)) and polyols (e.g., polyester, polyether).

    [0020] The elastomeric ring 124 may be mounted onto the inner hub 122 by any suitable manner. In the exemplary embodiment, the elastomeric ring 124 is pressed onto the inner hub 122. The inner diameter D4 of the elastomeric ring 124 is slightly smaller than the outer diameter D3 of the inner hub 122. When pressed onto the inner hub 122, the elastomeric ring 124 stretches to allow the outer diameter D3 of the inner hub 122 to fit within the inner diameter D4 of the elastomeric ring 124. Thus, when pressed onto the inner hub 122, the elastomeric ring 124 exerts a clamping force onto the hub forming a press or interference fit which attaches the elastomeric ring 124 to the inner hub 122. The clamping forces between the elastomeric ring 124 and the inner hub 122 are sufficient to hold the elastomeric ring 124 fixed to the inner hub 122 but also allow the elastomeric ring to be removed/replaced without the need to overcome a chemical bond.

    [0021] The retaining device 126 is configured to maintain a positive clamping force between the elastomeric ring 124 and the inner hub 122 at high rotational speeds of the cot wheel 112 where centrifugal forces act against the clamping force. The retaining device 126 may be configured in a variety of ways. Any configuration capable of maintaining a positive clamping force between the elastomeric ring 124 and the inner hub 122 at high rotational speeds, or of resisting centrifugal forces overcoming the clamping force of the elastomeric ring 124 on the inner hub 122, may be used. For example, the retaining device 126 may be configured to mechanically hold the elastomeric ring 124 in place relative to the inner hub 122 during rotation of the cot wheel 112.

    [0022] In the exemplary embodiment, the retaining device 126 includes a first retaining member 200 and a second retaining member 202 (see FIG. 9). In the exemplary embodiment, the first retaining member 200 and the second retaining member 202 are ring shaped and substantially similar. In other embodiments, however, the first and second retaining members 200, 202 may be other than ring-shaped and may be configured differently than each other. The first and second retaining members 200, 202 may be made of any suitable materials, such as for example, steel, aluminum, plastic, or other suitable material.

    [0023] FIGS. 7-8 illustrate the first retaining member 200. In the exemplary embodiment, the description of the first retaining member 200 applies equally to the second retaining member 202. The first retaining member 200 has an inner diameter D6, an outer diameter D7, a width W4, an outer circumferential surface 167, and an inner surface 168 generally parallel to the outer circumferential surface 166. The first retaining member 200 has a first end 170 with a first annular face 172 and a second end 174 with a second annular face 176 opposite and generally parallel to the first annular face 172.

    [0024] The second annular face 176 of the first retaining member 200 includes retaining structure 180 for engaging the first annular face 162 of the elastomeric ring 124. The retaining structure 180 may be configured in a variety of ways. Any structure that engages with the elastomeric ring 124 to resist movement of the elastomeric ring relative to the inner hub 122 may be used. According to the invention, the retaining structure 180 has one or more projections that indent or project into the first annular face 162 of the elastomeric ring 124. The retaining structure 180 may extend continuously around the second annular face 176 or may be discontinuous. In some embodiments, the elastomeric ring 124 may include a corresponding recess or hole for receiving the one or more projections. In other embodiments, however, the elastomeric ring 124 does not include a recess or hole for receiving the one or more projections. Instead, the one or more projections indent into the first annular face. In some embodiments, the elastomeric ring 124 may include one or more projections that are received in one or more recesses or holes in the retaining members 200, 202.

    [0025] In the illustrated embodiment, first retaining member 200 includes a tapered surface 182 projecting outward from the second annular face 176 such that a projection 184 is formed at the intersection between the second annular face 176 and the outer circumferential surface 167 of the first retaining member 200. The tapered surface 182 extends at an angle α from the second annular face 176. In one embodiment, the angle α is in the range of 5 degrees to 20 degrees. In one embodiment, the angle α is 10 degrees, or about 10 degrees. In other embodiments, the angle α may be greater than 20 degrees and less than 5 degrees.

    [0026] The first retaining member 200 includes one or more features that facilitate mounting the first retaining member onto the inner hub 122. The first retaining member 200 may mount onto the inner hub 122 in any suitable manner. In the illustrated embodiment, the first retaining member 200 includes a plurality of mounting holes 190 for receiving fasteners 192 (FIG. 9), such as for example bolts, for mounting the first retaining member 200 to the inner hub 122. In the illustrated embodiment, the first retaining member 200 has eight mounting holes 190. In other embodiments, however, the first retaining member 200 may have more or less than eight mounting holes 190. The mounting holes 190 on the first retaining member 200 are arranged to align with the fastener bores 148, 152 on the inner hub 122.

    [0027] Referring to FIG. 9, when assembled, the elastomeric ring 124 is pressed onto the inner hub 122 such that the inner surface 158 of the elastomeric ring 124 clamps against the outer circumferential surface 130 of the inner hub 122. The first retaining member 200 is fastened onto the inner hub 122 via fasteners 192 received through the mounting holes 190 (FIG. 7) and into the fastener bores 148 such that the second annular face 176 of the first retaining member 200 is tightened against the first annular face 146 of the inner hub 122. In a similar manner, the second retaining member 202 is fastened to the second annular face 150 of the inner hub 122 such that the elastomeric ring 124 is sandwiched between the first and second retaining members 200, 202.

    [0028] In the exemplary embodiment, the outer diameter D7 of the first retaining member 200 is greater than the inner diameter D4 of the elastomeric ring 124 and less than the outer diameter D5 of the elastomeric ring D4. In the assembled position, the tapered surface 182 and the projection 184 engage and indent into the first annular face 162 of the elastomeric ring 124. In the exemplary embodiment, all of, or the majority of, the engagement between the retaining structure 180 and the first annular face 162 occurs in the inner half of the first annular face 162. In other words, the first annular face 162 has a thickness T and the majority of engagement between the retaining portion 180 and the first annular face 162 occurs in the inner half of the thickness T (i.e., closer to the inner diameter D4 of the elastomeric ring than to the outer diameter D5).

    [0029] In operation, as the cot wheel 112 rotates, it pulls the fibers 102 around the perimeter of the cot wheel 112 and in between the cot wheel and the cutter wheel 114. The blades 116 on the cutter wheel 114 contact the circumferential surface 110 of the cot wheel 112 such that the fibers 102 therebetween are severed. Typical rotational speed of the cot wheel 112 may vary with different configurations of the cutting assembly 100. In some embodiments, for example, the rotational speed of the cot wheel 112 is such that the linear speed of the fibers 102 is about 20 m/sec or greater. As rotational speed increases, centrifugal forces act against the clamping forces that hold the elastomeric ring 124 onto the inner hub 122. The retaining device 126 holds the elastomeric ring 124 in place relative to the inner hub 122 to ensure that, at higher speeds, the centrifugal forces do not overcome the clamping forces resulting in the elastomeric ring 124 slipping relative to the inner hub 122.

    [0030] The engagement of the first and second retaining rings 200, 202 with the elastomeric ring 124 prevents the ring from expanding outward. In addition, the tapered surface 182 provides a wedging effect that increases the clamping force between the elastomeric ring 124 and the inner hub 122, particularly at the edges of the elastomeric ring adjacent the first and second annular faces 162, 166.

    [0031] FIG. 10 illustrates an exemplary embodiment of a first retaining member 300. The first retaining member 300 is substantially similar to the first retaining member 200 except that the first retaining member 300 includes a retaining structure 310 that is configured differently than the retaining structure 180 of the first retaining member 200. In particular, the retaining structure 310 of the first retaining member 300 includes a shoulder 312 projecting outward from an annular face 314 of the first retaining member 300. A tapered surface 315 extends outward from the annular face 314 and intersects with the shoulder 312 to form a projection or barb 316. The projection or barb 316 may indent into an annular face 318 of an elastomeric ring 320, which is substantially similar to the elastomeric ring 124 of FIGS. 5-6. The tapered surface 315 extends at an angle α from the annular face 314. In one embodiment, the angle α is in the range of 5 degrees to 20 degrees. In one embodiment, the angle α is 10 degrees or about 10 degrees. In other embodiment, the angle α may be greater than 20 degrees and less than 5 degrees.

    [0032] In operation, the retaining structure 310 functions similar to the retaining structure 180 of the first retaining member 200 by engaging the elastomeric ring 320 to retain the elastomeric ring in place, such that the centrifugal forces, at higher speeds, do not overcome the clamping forces.

    [0033] FIG. 11 illustrates an exemplary embodiment of a first retaining member 400. The first retaining member 400 is substantially similar to the first retaining member 200 except that the first retaining member 400 includes a retaining structure 410 that is configured differently than the retaining structure 180 of the first retaining member 200. In particular, the retaining structure 410 of the first retaining member 400 includes one or more teeth or threads 412 projecting outward from an annular face 414 of the first retaining member 400. The one or more teeth or threads 412 may indent into an annular face 418 of an elastomeric ring 420, which is substantially similar to the elastomeric ring 124 of FIGS. 5-6. The one or more teeth or threads 412 may be configured in a variety of ways. For example, the number of teeth, the shape and height of the teeth, and the frequency of the teeth may vary in different embodiments. In operation, the retaining structure 410 functions similar to the retaining structure 180 of the first retaining member 200 by engaging the elastomeric ring 420 to retain the elastomeric ring in place, such that the centrifugal forces, at higher speeds, do not overcome the clamping forces.

    [0034] FIG. 12 illustrates an exemplary embodiment of a first retaining member 500. The first retaining member 500 is substantially similar to the first retaining member 200 except that the first retaining member 500 includes a retaining structure 510 that is configured differently than the retaining structure 180 of the first retaining member 200. In particular, the retaining structure 510 of the first retaining member 500 includes a rounded projection 512 projecting outward from an annular face 514 of the first retaining member 500. The rounded projection 512 may indent into an annular face 518 of an elastomeric ring 520, which is substantially similar to the elastomeric ring 124 of FIGS. 5-6. The rounded projection 512 may be configured in a variety of ways. For example, the height and shape of the rounded projection 512 may vary in different embodiments. In the illustrated embodiment, the projection 512 is semi-circular with a constant radius R. In other embodiments, however, the projection 512 may not have a constant radius. In operation, the retaining structure 510 functions similar to the retaining structure 180 of the first retaining member 200 by engaging the elastomeric ring 520 to retain the elastomeric ring in place, such that the centrifugal forces, at higher speeds, do not overcome the clamping forces.

    [0035] FIG. 13 illustrates an exemplary embodiment of a first retaining member 600. The first retaining member 600 is substantially similar to the first retaining member 200 except that the first retaining member 600 includes a retaining structure 610 that is configured differently than the retaining structure 180 of the first retaining member 200. In particular, the retaining structure 610 of the first retaining member 600 includes a projection 612 projecting outward from an annular face 614 of the first retaining member 600. The projection 612 is received within a groove or recess 616 in the annular face 618 of an elastomeric ring 620, which is substantially similar to the elastomeric ring 124 of FIGS. 5-6, but for the groove or recess 616. The projection 612 and groove or recess 616 may be configured in a variety of ways. For example, the height and shape of the projection 612 and groove or recess 616 may vary in different embodiments. In the illustrated embodiment, the projection 612 is a rectangular ridge extending continuously around the annular face 614 of the first retaining member 600 and is received in the groove or recess 616 which is also rectangular and extends continuously around the annular face 618. In other embodiments, however, the projection 612 and the groove 616 may be other than rectangular and may be discontinuous. In operation, the retaining structure 610 functions similar to the retaining structure 180 of the first retaining member 200 by engaging the elastomeric ring 620 to retain the elastomeric ring in place, such that the centrifugal forces, at higher speeds, do not overcome the clamping forces.


    Claims

    1. An assembly (100) for chopping glass fibers, the assembly comprising:

    a cutter wheel (114) having a plurality of radially extending blades (116); and

    a cot wheel (112) adjacent the cutter wheel (114), the cot wheel (112) comprising:

    an inner hub (122);

    an elastomeric ring (124) mounted onto the inner hub (122) for rotation therewith; and

    a retaining device (126) fixably attached to the inner hub (122), characterized in that the retaining device including a projection that indents or projects into the elastomeric ring (124) to resist separation of the elastomeric ring (124) from the inner hub (122) during rotation of the cot wheel (112).


     
    2. The assembly (100) of claim 1, wherein the elastomeric ring (124) is pressed onto the inner hub (122).
     
    3. The assembly (100) of claim 1, wherein the elastomeric ring (124) comprises polyurethane.
     
    4. The assembly (100) of claim 1, wherein the retaining device (126) includes a first retaining member (200) and a second retaining member (202), and wherein the elastomeric ring (124) is sandwiched between the first retaining member (200) and the second retaining member (202).
     
    5. The assembly (100) of claim 4, wherein the elastomeric ring (124) includes a first annular face and a second annular face and wherein the first retaining member (200) includes a first retaining portion that engages the first annular face of the elastomeric ring (124) and the second retaining member (202) includes a second retaining portion that engages the second annular face of the elastomeric ring (124).
     
    6. The assembly of claim 5, wherein the first retaining portion indents into the first annular face of the elastomeric ring (124).
     
    7. The assembly (100) of claim 6, wherein the first retaining portion includes a tapered surface that wedges at least a portion of the elastomeric ring toward the inner hub.
     
    8. The assembly (100) of claim 4, wherein the first retaining member (200) is an annular ring with an outer diameter that is greater than the inner diameter of the elastomeric ring (124) and less than the outer diameter of the elastomeric ring (124).
     
    9. The assembly (100) of claim 8, wherein the first retaining member (200) includes a retaining portion that engages the first annular face of the elastomeric ring (124) and extends continuously around an annular face of the first retaining member (200) .
     
    10. The assembly (100) of claim 5, wherein the elastomeric ring (124) has a thickness (T) and the majority of engagement between the first retaining portion and the first annular face occurs in the inner half of the thickness (T).
     
    11. A method of cutting glass fibers, the method comprising:

    bringing continuous glass fibers into engagement with a circumferential surface (110) of a first rotatable member (112) that includes an elastomeric ring (124) mounted onto a cylindrical inner hub (122) for rotation with the inner hub (122);

    rotating the first rotatable member (112) to bring the glass fibers into contact with one or more cutter blades (116);

    cutting the glass fibers into discrete segments (120) with the one or more blades (116); and

    characterized by mechanically holding the elastomeric ring (124) in place relative to the inner hub (122) by indenting or projecting into an annular face of the elastomeric ring with a projection on a retaining member fixably attached to the inner hub..


     
    12. The method of claim 11, wherein the projection (180) preferably comprising a ramped surface or a plurality of teeth.
     
    13. The method of claim 12, wherein the retaining device (126) is an annular ring with an outer diameter that is greater than the inner diameter of the elastomeric ring (124) and less than the outer diameter of the elastomeric ring (124), .
     
    14. The method of claim 12, wherein indenting the annular face comprises wedging at least a portion of the elastomeric ring (124) toward the inner hub (122).
     


    Ansprüche

    1. Anordnung (100) zum Häckseln von Glasfasern, wobei die Anordnung umfasst:

    ein Schneidrad (114), das mehrere sich radial erstreckende Klingen (116) aufweist, und

    ein Anlaufrad (112) benachbart zu dem Schneidrad (114), wobei das Anlaufrad (112) umfasst:

    eine innere Nabe (122),

    einen Elastomerring (124), der an der inneren Nabe (122) zur Drehung damit montiert ist, und

    eine Sicherungsvorrichtung (126), die fixierbar an der inneren Nabe (122) angebracht ist, dadurch gekennzeichnet, dass die Sicherungsvorrichtung einen Fortsatz beinhaltet, der in den Elastomerring (124) einrückt oder vorrückt, um einer Trennung des Elastomerrings (124) von der inneren Nabe (122) während der Drehung des Anlaufrads (112) zu widerstehen.


     
    2. Anordnung (100) nach Anspruch 1, wobei der Elastomerring (124) auf die innere Nabe (122) aufgepresst ist.
     
    3. Anordnung (100) nach Anspruch 1, wobei der Elastomerring (124) Polyurethan aufweist.
     
    4. Anordnung (100) nach Anspruch 1, wobei die Sicherungsvorrichtung (126) ein erstes Sicherungsglied (200) und ein zweites Sicherungsglied (202) beinhaltet, und wobei der Elastomerring (124) zwischen dem ersten Sicherungsglied (200) und dem zweiten Sicherungsglied (202) angeordnet ist.
     
    5. Anordnung (100) nach Anspruch 4, wobei der Elastomerring (124) eine erste ringförmige Fläche und eine zweite ringförmige Fläche beinhaltet und wobei das erste Sicherungsglied (200) einen ersten Sicherungsteil beinhaltet, der mit der ersten ringförmigen Fläche des Elastomerrings (124) in Eingriff steht, und das zweite Sicherungsglied (202) einen zweiten Sicherungsteil beinhaltet, der mit der zweiten ringförmigen Fläche des Elastomerrings (124) in Eingriff steht.
     
    6. Anordnung nach Anspruch 5, wobei der erste Sicherungsteil in die erste ringförmige Fläche des Elastomerrings (124) einrückt.
     
    7. Anordnung (100) nach Anspruch 6, wobei der erste Sicherungsteil eine verjüngte Oberfläche beinhaltet, die mindestens einen Teil des Elastomerrings zu der inneren Nabe hin verkeilt.
     
    8. Anordnung (100) nach Anspruch 4, wobei das erste Sicherungsglied (200) ein ringförmiger Ring mit einem Außendurchmesser ist, der größer als der Innendurchmesser des Elastomerrings (124) und kleiner als der Außendurchmesser des Elastomerrings (124) ist.
     
    9. Anordnung (100) nach Anspruch 8, wobei das erste Sicherungsglied (200) einen Sicherungsteil beinhaltet, der mit der ersten ringförmigen Fläche des Elastomerrings (124) in Eingriff steht und sich durchgehend um eine ringförmige Fläche des ersten Sicherungsglieds (200) herum erstreckt.
     
    10. Anordnung (100) nach Anspruch 5, wobei der Elastomerring (124) eine Dicke (T) aufweist und der Großteil des Eingriffs zwischen dem ersten Sicherungsteil und der ersten ringförmigen Fläche in der inneren Hälfte der Dicke (T) erfolgt.
     
    11. Verfahren zum Schneiden von Glasfasern, wobei das Verfahren umfasst:

    Ineingriffbringen kontinuierlicher Glasfasern mit einer umlaufenden Oberfläche (110) eines ersten drehbaren Gliedes (112), das einen Elastomerring (124) beinhaltet, der an einer zylindrischen inneren Nabe (122) zur Drehung mit der inneren Nabe (122) montiert ist,

    Drehen des ersten drehbaren Gliedes (112), um die Glasfasern in Kontakt mit einer oder mehreren Schneidklingen (116) zu bringen,

    Schneiden der Glasfasern in diskrete Segmente (120) mit der einen oder den mehreren Klingen (116), und

    gekennzeichnet durch mechanisches Halten des Elastomerrings (124) in seiner Stellung relativ zu der inneren Nabe (122) durch Einrücken oder Vorrücken eines Fortsatzes an einem Sicherungsglied, das fixierbar an der inneren Nabe angebracht ist, in eine ringförmige Fläche des Elastomerrings.


     
    12. Verfahren nach Anspruch 11, wobei der Fortsatz (180) vorzugsweise eine rampenförmige Oberfläche oder mehrere Zähne umfasst.
     
    13. Verfahren nach Anspruch 12, wobei die Sicherungsvorrichtung (126) ein ringförmiger Ring mit einem Außendurchmesser ist, der größer als der Innendurchmesser des Elastomerrings (124) und kleiner als der Außendurchmesser des Elastomerrings (124) ist.
     
    14. Verfahren nach Anspruch 12, wobei das Einrücken der ringförmigen Fläche das Verkeilen mindestens eines Teils des Elastomerrings (124) zu der inneren Nabe (122) hin umfasst.
     


    Revendications

    1. Ensemble (100) pour hacher des fibres de verre, l'ensemble comprenant :

    une molette de coupe (114) ayant une pluralité de lames s'étendant radialement (116) ; et

    une roulette (112) adjacente à la molette de coupe (114), la roulette (112) comprenant :

    un moyeu interne (122) ;

    une bague élastomère (124) montée sur le moyeu interne (122) pour tourner avec ce dernier ; et

    un dispositif de retenue (126) attaché, de manière fixe, au moyeu interne (122), caractérisé en ce que le dispositif de retenue comprend une saillie qui rentre ou fait saillie dans la bague élastomère (124) pour résister à la séparation de la bague élastomère (124) du moyeu interne (122) pendant la rotation de la roulette (112).


     
    2. Ensemble (100) selon la revendication 1, dans lequel la bague élastomère (124) est comprimée sur le moyeu interne (122).
     
    3. Ensemble (100) selon la revendication 1, dans lequel la bague élastomère (124) comprend du polyuréthane.
     
    4. Ensemble (100) selon la revendication 1, dans lequel le dispositif de retenue (126) comprend un premier élément de retenue (200) et un second élément de retenue (202), et dans lequel la bague élastomère (124) est prise en sandwich entre le premier élément de retenue (200) et le second élément de retenue (202).
     
    5. Ensemble (100) selon la revendication 4, dans lequel la bague élastomère (124) comprend une première face annulaire et une seconde face annulaire et dans lequel le premier élément de retenue (200) comprend une première partie de retenue qui met en prise la première face annulaire de la bague élastomère (124) et le second élément de retenue (202) comprend une seconde partie de retenue qui met en prise la seconde face annulaire de la bague élastomère (124).
     
    6. Ensemble selon la revendication 5, dans lequel la première partie de retenue rentre dans la première face annulaire de la bague élastomère (124).
     
    7. Ensemble (100) selon la revendication 6, dans lequel la première partie de retenue comprend une surface progressivement rétrécie qui cale au moins une partie de la bague élastomère vers le moyeu interne.
     
    8. Ensemble (100) selon la revendication 4, dans lequel le premier élément de retenue (200) est une bague annulaire avec un diamètre externe qui est supérieur au diamètre interne de la bague élastomère (124) et inférieur au diamètre externe de la bague élastomère (124).
     
    9. Ensemble (100) selon la revendication 8, dans lequel le premier élément de retenue (200) comprend une partie de retenue qui met en prise la première face annulaire de la bague élastomère (124) et s'étend de manière continue autour d'une face annulaire du premier élément de retenue (200).
     
    10. Ensemble (100) selon la revendication 5, dans lequel la bague élastomère (124) a une épaisseur (T) et la majorité de la mise en prise entre la première partie de retenue et la première face annulaire a lieu dans la moitié interne de l'épaisseur (T).
     
    11. Procédé pour couper des fibres de verre, le procédé comprenant les étapes suivantes :

    amener des fibres de verre continues en mise en prise avec une surface circonférentielle (110) d'un premier élément rotatif (112) qui comprend une bague élastomère (124) montée sur un moyeu interne cylindrique (122) pour tourner avec le moyeu interne (122) ;

    faire tourner le premier élément rotatif (112) pour amener les fibres de verre en contact avec une ou plusieurs lames de coupe (116) ;

    couper les fibres de verre en segment discrets (120) avec les une ou plusieurs lames (116) ; et

    caractérisé par l'étape pour maintenir mécaniquement la bague élastomère (124) en place par rapport au moyeu interne (122) en rentrant ou faisant saillie dans une face annulaire de la bague élastomère avec une saillie sur un élément de retenue attaché de manière fixe au moyeu interne.


     
    12. Procédé selon la revendication 11, dans lequel la saillie (180) comprend de préférence une surface à rampe ou une pluralité de dents.
     
    13. Procédé selon la revendication 12, dans lequel le dispositif de retenue (126) est une bague annulaire avec un diamètre externe qui est supérieur au diamètre interne de la bague élastomère (124) et inférieur au diamètre externe de la bague élastomère (124).
     
    14. Procédé selon la revendication 12, dans lequel l'étape pour faire rentrer la face annulaire comprend l'étape pour caler au moins une partie de la bague élastomère (124) vers le moyeu interne (122).
     




    Drawing























    Cited references

    REFERENCES CITED IN THE DESCRIPTION



    This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

    Patent documents cited in the description