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(11) | EP 3 315 178 A1 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | A METHOD FOR PREPARING OPTIMIZED STRUCTURE FOOTBALL |
BACKGROUND OF THE INVENTION
Field of the invention
[0001] The present invention relates, generally, to the field of preparing football, and more particularly to a method for preparing optimized structure football.
Description of the Prior Art
[0002] In the course of the existing football liner production process, yarn wrapping is a very important step, the yarn is immersed in glue and then winding in the Liner surface, currently, yarn wrapping is mainly completed by artificial winding or equipment winding. The above methods requires lots of mechanical equipments, with complex process, high labor costs, high material cost, low efficiency and uneven thickness. The production of the prior art is also easy to absorb water, with poor bouncing performance, not durable, yarn expose and other deficiencies.
SUMMARY OF THE INVENTION
[0003] In order to overcome the above-mentioned deficiencies of the prior art, it is an object of the present invention to provide a simple method for preparing optimized structure football with low cost. The football obtained is flexible, soft, with good bouncing performance, durable and not easy to absorb water.
[0004] In order to achieve the above object, the present invention includes the following technical solution:
A method for preparing optimized structure football characterized in that the manufacturing process comprises the steps of:
Step 1, selecting the interlaced cloth, cutting the interlaced cloth into pieces, and sewing the plurality of cloth pieces into a Liner shell;
Step 2, put the football Liner into the interior of the Liner shell, and sewing by using the sewing machine;
Step 3, brush glue in the football mouth area;
Step 4, fill air into the Liner, and brush glue in the bare sewing line after inflatable stereotypes;
Step 5, dry the Liner shell after brushing the glue;
Step 6, the football is made from the outside to the middle by the PU layer, the EVA foam layer, the non-dampening layer and the interlaced cloth layer, and the PU layer and the EVA foam layer I are adhered by glue wherein the EVA foam layer I is bonded to the non-dampening layer through the glue, the non-dampening layer is bonded to the interlaced cloth layer through the glue;
Step 7, cut the football skin into pieces, and sewing the pieces into football shell by sewing machine;
Step 8, bonding EVA foam cotton layer with the ball shell surface through the glue;
Step 9, put the drying Liner shell into the ball shell and sewing; the Liner shell contact with EVA foam layer.
Step 10, check the leakage of the football, fill air into the football at constant pressure, and make sure the pressure is consistent in a time period of a plurality of hours;
Step 11, for the pressure changes within 0-0.5pa, use the plastic processing to the bare sewing line.
[0008] Further, the football Liner is made of rubber inner Liner, PVC Liner, TPU Liner or latex gall Liner.
[0010] Further, the interlaced cloth is made of one or more of a nonwoven fabric, a polyester, a cotton cloth, an acrylic or a polyester-cotton blended fabric.
[0012] Further, the EVA foam layer I and the EVA foam layer II are respectively replaced with a TPE foam layer and / or an SBR foam layer.
Embodiments
The technical solutio
[0015] A method for preparing optimized structure football characterized in that the manufacturing process comprises the steps of:
Step 1, selecting the interlaced cloth and folded into four layers, cutting the interlaced cloth into pieces, and the 8-layer cloth is sewn into a liner shell by a sewing machine into a Liner shell; The stitch of the sewing machine is made of cotton thread, and the margin of the sewing machine is 4 mm.
Step 2, put the football Liner into the interior of the Liner shell; And use the sewing machine to seal the Liner shell, the Liner is made of rubber, and the thickness of the glue brushed on the sewing thread is 3mm;
Step 3, brush glue in the football mouth area;
Step 4, fill air into the Liner, and brush glue in the bare sewing line after inflatable stereotypes;
Step 5, dry the Liner shell after brushing the glue;
Step 6, the football is made from the outside to the middle by the PU layer, the EVA foam layer, the non-dampening layer and the interlaced cloth layer, and the PU layer and the EVA foam layer I are adhered by glue wherein the EVA foam layer I is bonded to the non-dampening layer through the glue, the non-dampening layer is bonded to the interlaced cloth layer through the glue;
Step 7, cut the football skin into pieces, and sewing the pieces into football shell by sewing machine;
Step 8, bonding EVA foam cotton layer with the ball shell surface through the glue;
Step 9, put the drying Liner shell into the ball shell and sewing; the Liner shell contact with EVA foam layer.
Step 10, check the leakage of the football, fill air into the football at constant pressure, and check if the pressure is consistent in 72 hours;
Step 11, for the pressure changes of 0.5pa, use the plastic processing to the bare sewing line.
[0016] The basic principles and main features of the present invention have been shown and described above. It should be understood by those skilled in the art that the present invention is not limited by the above-described embodiments and that the principles described in the above examples and specification are illustrative of the principles of the invention without departing from the spirit and scope of the invention Various changes and modifications, and such changes and modifications are within the scope of the invention as claimed. It is intended that the scope of the invention be defined by the appended claims and their equivalents.
Step 1, selecting the interlaced cloth, cutting the interlaced cloth into pieces, and sewing the plurality of cloth pieces into a liner shell;
Step 2, put the football liner into the interior of the liner shell, and sewing by using the sewing machine;
Step 3, brush glue in the football mouth area;
Step 4, fill air into the liner, and brush glue in the bare sewing line after inflatable stereotypes;
Step 5, dry the liner shell after brushing the glue;
Step 6, the ball is made from the outside to the middle by the PU layer, the EVA foam layer, the non-dampening layer and the interlaced cloth layer, and the PU layer and the EVA foam layer I are adhered by glue wherein the EVA foam layer I is bonded to the non-dampening layer through the glue, the non-dampening layer is bonded to the interlaced cloth layer through the glue;
Step 7, cut the ball skin into pieces, and sewing the pieces into ball shell by sewing machine;
Step 8, bonding EVA foam cotton layer with the ball shell surface through the glue;
Step 9, put the drying liner shell into the ball shell and sewing; the liner shell contact with EVA foam layer.
Step 10, check the leakage of the ball, fill air into the ball at constant pressure, and make sure the pressure is consistent in a time period of a plurality of hours;
Step 11, if the pressure changes in step 10 is within 0-0.5 pa, use the plastic processing to the bare sewing line.