[0001] The invention relates to a panel for the manufacture of a wall, ceiling or the like
comprising a core of mineral wool or suchlike insulating material and boards on both
sides of said core, the ends on at least two sides of which are inwardly bent over.
[0002] Such a panel is known from Dutch Patent Application 7705382. In this known panel
the material of the core near the sides of the panel has greater density than the
material of the medium part of the core, whilst for the mutual joint of the panels
the core material has grooves near the sides for receiving a tie member. Therefore,
this known construction is expensive in manufacture and mounting.
[0003] The invention has for its object to provide a panel of the kind set forth having
a simple configuration and yet ensuring a satisfactory joint between the panels.
[0004] According to the invention this can be achieved by bending over the rims on one side
of the panel through an angle of less than 90° with respect to the plane of the boards
concerned, whereas on the other side of the panel the rims are bent over through an
angle of more than 90° with respect to the plane of the boards concerned so that as
a result of the bending of the rims the sandwiched, insulating material is densified
in the area of the rims and is pressed at least partly outwards from between the rims.Since
by bending over the boards the sandwiched, insulating material is automatically slightly
densified and the material bulges out slightly from between the bent-over rims, a
satisfactorily sealing joint between the panels will be obtained when positioning
the panels side by side in contact with one another to form a wall or the like.
[0005] It should be noted that from Austrian Patent Specification 300,289 a panel is known
which is provided at one edge with a groove bounded by relatively parallel board parts
and at the opposite edge with a spring also bounded by relatively parallel board parts.
[0006] Between the boards is sandwiched hard foam which is permoulded at the location of
the groove and the spring respectively for obtaining a vaulted, protruding boundary
face. This requires pretreatment of the hard foam befofe it is arranged between the
boards. Densification and protrusion of the insulating material by bending over the
rims during the manufacture of the panel-are, however, not known from said publication.
[0007] The invention will be described more fully hereinafter with reference to the accompanying
drawing showing a schematic plan view of the proximal sides of two panesl of identical
design.
[0008] From the Figure it will be apparent that each panel comprises two relatively parallel
coating sheets 1 and 2, usually made from metal, between which is located a core 3
of mineral wool or similar insulating material.
[0009] Near one side of a panel the rims 4 and 5 of the coating sheets 1 and 2 are bent
over in the embodiment shown through an angle of 135
0 around folding lines 6 and 7 respectively. In general, the rims will first be bent
over at right angles and subsequently the insulating material 3 will be sandwiched
between the sheets 1 and 2 so that it is firmly pressed against the rims bent over
at right angles. Then the rims 4 and 5 are further bent over inwardly. This results
in that when bending over the rims 4 and 5 the insulating material is densified to
a given extent in the area of the side concerned of the panel and will form, in addition,
a part 8 slightly bulging outwards between the proximal ends of the rims 4 and 5.
[0010] Near the other side of the panel the rims 9 and 10 of the sheets are inwardly bent
over through an angle of 45
0 prior to the disposition of the sheets on the insulating material. The core 3 of
insulating material is proportioned so that it extends in the unloaded state up to
the free ends of said rims. Therefore, also in this case when the bent-over rims 9
and 10 are pressed against the insulating material a certain degree of densification
of the insulating material will occur, whilst at the same time the material will form
an outwardly bulging part 11 between the proximal ends of the bent-over rims 9.and
10.
[0011] In order to build up a wall, a ceiling or a similar partition such panels will be
arranged in a conventional manner side by side and be pressed one against the other
so that the bent-over parts 5 and 10 and the bent-over parts 4 and 9 firmly contact
one another, thus ensuring a satisfactorily relative alignment of the panels. When
the panels as well as a satisfactory mutual fixation of the panesl as well as asatisfactory
relative alignment of the panels. When the panels are ipressed one against the other
the bulging parts 8 and 11 of the insulating material will be depressed so that at
the same time a satisfactorily sealing joint between the insulating cores of the;
panels is obtained, whilst a heat transferring bridge is avoided, since the proximal
ends of the bent-over rims 4, 5, 9 and 10 are separated from one another by the insulating
material. Since, moreover the sides of the panels engage one another no chink will
be formed at right angles to the plane of the ready wall or the like.
[0012] The figures used in the claims are only meant to explain more clearly the intention
of the invention and are not supposed to be any restriction concerning the interpretation
of the invention.
1. A panel for building up a wall, a ceiling or the like comprising a core of mineral
wool or suchlike insulating material and boards located on both sides of said core
and having their rims inwardly bent over on at least two sides of the panel characterized
in that on one side of the panel the rims are bent over through an angle of less than
90° with respect to the plane of the boards concerned, whereas on the other side of
the panel the rims are bent over through an angle of more than 90° with respect to
the plane of the boards concerned so that owing to bending over the rims the sandwiched,
insulating material is densified in the area of the rims and at least partly pressed
outwards from between the rims.
2. A panel as claimed in Claim 1 characterized in that the bent-over rims are at an
angle of 45 and 135° respectively to the further parts of the boards.
3. A panel as claimed in anyone of the preceding Claims characterized in that the
core is proportioned so that at the board rims bent over through an angle of more
than 90o the core extends in the undeformed state up to near the folding lines along which
the boards are bent over.
4. A panel as claimed in anyone of the preceding Claims characterized in that the
core is proportioned so that at the board rims bent over through an angle of less
than 90° the core extends in the undeformed state up to the outer side of the boards.
