JPS59160474A - Leather covered ball - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] This invention relates to leather-covered reballs for pneumatic basketballs for ball games, handballs, etc.). It is intended to provide a high level of entertainment.

Conventionally, these balls are made with a reinforcing layer such as nylon thread wrapped around the inner tube.
Nakahari cup (rubber) molded into a spherical shape! A carbonyl substrate was produced by adhering the material by placing it in a vulcanization mold having a groove for forming an IJ and vulcanizing it. Therefore, the ribs are made integrally with the ball base and are coated with a rubber adhesive and dried, while the outer skin panel of natural leather (or synthetic leather) cut into a predetermined shape is coated with a rubber adhesive and dried. This conventional method, in which the leather is attached by manually fitting the leather into the section surrounded by the ribs of the ball base, has many drawbacks as described below.

(a) The manufacturing process of the mold for vulcanizing the ball base is complicated and inevitably expensive.

(b) When the ball base was vulcanized, defective products were likely to occur in the convex rubber rib portions (due to insufficient filling of the rubber material in the rib portions).

(c) Since the part of the ball base covered by the skin panel and the part of the rib exposed to the outside are integrated, it was not possible to select a material suitable for the small part of the rib in terms of color and weather resistance.

(d) When applying adhesive to the ball base, it is difficult to avoid soot (inefficiency), so the ribs exposed on the ball surface may be discolored or smeared with adhesion spots, and may be difficult to avoid in the next process. The processing mold was contaminated.

(e) Leather pasting was done by hand, so productivity was extremely low.

These drawbacks can be eliminated by implementing the present invention.

Figure 1 shows a partial cross-section of a conventional ball, with 1 indicating a butyl rubber inner tube, 2 a rubber midsole layer including a nylon thread wound layer, 3 a rubber rib integrated with the rubber midsole layer 2, and 4 an adhesive layer. , 5 indicates the epidermal panel.

2 and 3 each show a partial cross-sectional view of a ball obtained by carrying out the present invention, and the same reference numerals are given to the corresponding parts as shown in FIG. 1.

The embodiment shown in Fig. 2 is related to a size 7 leather basket, in which several 70 denier/1 x 2 nylon 66 threads are lined up on a butyl rubber inner tube 1 and rubber glue is applied. Spread uniformly on the spherical surface without track 300
0n1 roll, on top of which a 1-inch thick medium tension cover rubber 6 containing black natural rubber is molded into a spherical shape and placed along it, and is vulcanized in a vulcanization mold without rib grooves to form the medium tension layer 2. At the same time, a size 7 ball base is created. On the other hand, the ribbon-shaped rubber corresponding to the lip is made of a black natural rubber compound, and is extracted and molded using an extraction machine into a predetermined cross-sectional shape (a rectangle with 1.3 cranes in length and 5 cranes in width), and the surface to be bonded to the ball base is made of rubber. Apply adhesive and let dry. Also, the wrinkled natural leather that will become the skin panel is cut into a predetermined size and shape, printed, and shaved, and a rubber adhesive is applied to the bonding surface and dried in the same manner as the rubber bongs described above. The several skin panels and ribbon-shaped rubber are loaded into the leather pasting machine while being adsorbed one after another onto the hemispherical inner surface of the leather pasting machine, and then the ball base coated with adhesive and dried is built into the leather pasting machine and the ball is Compressed air of 6 kg/cd is injected into the base to press the natural leather panel and ribbon-like rubber to the ball base.

In FIG. 2, reference numeral 7 indicates a rib made of ribbon-like rubber, 4 an adhesive layer, and 8 a skin panel made of natural leather.

The performance appearance of the ball molded in this way is not inferior to conventional basketball retopoles, but the production efficiency is 3 to 4 times higher than the conventional method of hand-stretching, and the material color of the ribs is improved. has the advantage that you can get what you want according to your needs.

The embodiment shown in FIG. 3 is an attempt to reduce costs by omitting the intermediate cover rubber and the process of force/XJ-X type-sulfur in the embodiment 1 shown in FIG.

In other words, several 100 denier nylon 66 raw threads were rolled onto a butyl rubber tube 1 (slightly heavier than the one shown in Fig. 2) while applying rubber glue until the length was 4000 m, and a Nakahari Kawai was made. A No. 7 substrate with a smooth substrate surface was prepared by heating with a trowel at 140° C. for 2 minutes in a vulcanization mold without heating. The subsequent leather bonding process is exactly the same as that of the embodiment shown in FIG. 2 to obtain the finished product, thereby making it possible to provide a low-cost leather belt.

[Brief explanation of the drawing]

Since the drawings are used to explain the present invention in detail, FIG. 1 is a partial cross-sectional view of a conventional ball, and FIGS. 2 and 3 are partial cross-sectional views of a ball showing different embodiments of the present invention. It is. 'l Inner tube 2 Rubber middle layer 3 Rubber rib 4 Adhesive layer 5 Outer panel □ Patent applicant Molten Co., Ltd. Agent Patent attorney Takehiro Furuta Figure 1 Figure ゛Z Figure 3 Procedural amendment 1, Indication of the case Patent III (2) 2, filed on October 15, 1982;
Name of the invention Leather-bound ball 3. Relationship with the case of the person making the amendment Patent applicant Molten Co., Ltd. 401 Agent ■ 730 6. Number of inventions increased by the amendment None 7. Specification to be amended Document 1. Name Leather Ball 2, Claim 3, Detailed Description of the Invention This invention focuses on improving the complexity and inefficiency of the manufacturing process for leather balls such as pneumatic basketballs for ball games and handballs. The purpose is to provide a leather-covered ball that is easy to manufacture. Conventionally, these balls are as shown in FIG. In other words, these balls are constructed by forming a reinforcing layer such as a nylon thread on the inner tube 1, and then placing a spherical middle cover rubber on the reinforcing layer in grooves for forming dividing ribs. The ball base was made by placing it in a mold with an engraved part and vulcanizing it to adhere it.Therefore, the partition ribs 3 were made integral with the ball base, and a rubber adhesive was applied thereto and dried. On the other hand, apply a rubber adhesive to a skin panel of natural leather (or synthetic leather) that has been cut into a predetermined shape, dry it, and fit it by hand into the compartment surrounded by the compartment ribs 3 of the Bonyl base. This conventional method had the following disadvantages: (a) The manufacturing process of the mold for vulcanizing the ball base was complicated and unavoidable. (b) When the ball base was vulcanized, it was easy to produce defective products with the dividing ribs 3 without a convex shape (due to insufficient filling of the rubber material in the rib portions). ) Ball base (rubber lining [
2) and the partition rib 3 exposed on the surface are integrated,
It was not possible to select a material suitable for the small section ribs 3 in terms of color and weather resistance. (d) When applying adhesive to the base of the ball, partition rib 3
Since it is difficult to avoid this (inefficiency), the partition ribs 3 exposed on the pole surface exhibit discoloration and stains due to adhesion spots, and also stain the processing mold for the next process. (e) Leather pasting was done by hand, so productivity was extremely low. This invention was made in order to eliminate the conventional drawbacks as described above. A first embodiment of the present invention will be explained based on FIG. Note that the same reference numerals are given to the corresponding members as those shown in FIG. This example relates to a size 7 leather basket. Several 70 denier/1x2 nylon 66 twisted threads are arranged on a butyl rubber inner tube 1, and while applying rubber glue, they are spread evenly over the spherical surface. Rolled for 3000m,
On top of this, a medium cover rubber 6 containing black natural rubber and having a thickness of 1Wm is molded into a spherical shape and placed along it, and is vulcanized in a vulcanization mold without rib grooves to form a rubber medium cover layer 2. Create a ball base of size 7. In other words, the outer surface of the ball base is formed smoothly and without any undulations. On the other hand, the dividing ribs 7, which are arranged in a predetermined pattern on the outer surface of the ball base, for example, in a dividing pattern for basketball, handball, etc., are made of a ribbon-shaped rubber material containing black natural rubber.
A predetermined cross-sectional shape (a rectangle with a length of 1.3 fi and a width of 5 mm) is extruded and vulcanized using an extruder, and a rubber adhesive 4 is applied and dried on the surface to be bonded to the ball base. Furthermore, a flat skin panel 8 placed in the compartment surrounded by the compartment ribs 7 is made by cutting, printing, and sawing grained natural leather into a predetermined size and shape. Similarly, a rubber adhesive 4 is applied to the adhesive surface and dried. These 8 skin panels and ribbon-shaped division ribs 7 are loaded into the leather pasting machine while adsorbing them one after another onto the hemispherical inner surface of the leather pasting machine, and then the ball base coated with adhesive and dried is built into the leather pasting machine. Then, 6 kg/cj of compressed air is injected into the pole base to press the skin panel 8 and partition rib 7 to the ball base. As described above, the present invention comprises a ball base whose outer surface is formed smoothly and without undulations, a dividing rib 7 made of ribbon-like rubber adhered to the outer surface of the ball base in a predetermined pattern, and a dividing rib on the outer surface of the ball base. It comprises a skin panel 8 adhered to the area surrounded by 7. According to this invention, the performance and appearance of the leather-covered pole are not inferior to conventional basketballs, and the production efficiency is improved by 3 to 4 times compared to the conventional method of hand-covering, and the material of the partition ribs 7 is The color has the advantage that it can be tailored to the desired taste. A second embodiment of the present invention shown in FIG. 3 eliminates the middle cover rubber 6 in the first embodiment and omits the cover molding and vulcanization process to reduce costs. That is, on the inner tube 1 made of butyl rubber, which is slightly heavier than that in the first embodiment, several 6.6 m 100 denier nylon threads are wound while being stretched while applying F rubber glue to a length of 4000 m. A No. 7 ball base with a smooth pole base surface was prepared by heating at 140° C. for 2 minutes in a vulcanization mold without applying a cover rubber. The subsequent leather application process is exactly the same as that of the first embodiment to obtain the finished product, thereby making it possible to provide an inexpensive basketball. 4. Brief explanation of the drawings TI! J is a partial cross-sectional view of a conventional leather-covered pole, the second
The figure is a view corresponding to the above, showing a first embodiment of the leather-covered pole according to the present invention, and FIG. 3 is a view corresponding to the above, showing a second embodiment of the same. 1 Inner tube 2 Rubber lining layer 3 Compartment rib 4 Adhesive layer 5 Outer panel t Inner cover rubber 7 Compartment rib 8 Outer panel

Claims (1)

[Claims] In a leather-covered lipo having a surface structure in which partition ribs are exposed on the ball surface and a skin panel is attached within the partitions surrounded by the ribs, the ball base body has a smooth outer surface with no undulations. A leather-covered ball, characterized in that the dividing ribs and the skin panel are bonded to the ball base by simultaneous processing.