CN205672472U - A hollow sphere and a sports ball using the hollow sphere - Google Patents

Abstract

The utility model relates to a hollow sphere and a sports ball using the hollow sphere. The hollow sphere includes two hemispherical shells; each hemispherical shell includes an embryo, a gauze and an outer shell; the embryo is formed into a hemispherical embryo by heating and molding chemical fiber gauze, the embryo has a hemispherical cavity, and the hemispherical cavity has an opening that penetrates the end face where the center of the embryo is located; the gauze is composed of a plurality of weft yarns wound on the outer surface of the embryo and a plurality of warp yarns wound on the outer surface of the embryo; the outer shell is a hemispherical outer shell formed by injection molding of thermoplastic elastic material on the outer surface of the gauze of the embryo; the two hemispherical shells are connected by heat welding to form a closed hollow sphere. The utility model has the characteristics of environmentally friendly materials, simple structure, fast molding, good roundness and high strength.

Description

A hollow sphere and a sports ball using the hollow sphere

technical field

The utility model relates to a hollow sphere, in particular to a hollow sphere and a sports ball using the hollow sphere.

Background technique

The molding method of hollow sports balls such as basketballs is to first make an inner container, then wrap yarn on the inner container, and then place it in a spherical shell (also called a middle tire) that is sewn or otherwise formed. Its structure usually includes: inner tank, that is, the bladder, in the innermost part of the ball, usually made of black rubber or butyl rubber; yarn winding, the surface of the inner tank is evenly wound with yarn and dipped with glue to coat the yarn, and the inner tank Form a protective layer like a silkworm cocoon, or fit gauze on the surface of the inner tank instead of winding yarn to ensure the roundness after inflation; the spherical shell, the supporting structure between the inner tank and the skin, is made of rubber material; The ball skin is divided into three categories: rubber, synthetic leather (microfiber, PU, PVC, etc.), and genuine leather; ball mouth: connected to the inflatable channel of the inner tank, air tightness is very critical.

Among them, gauze is often used instead of gauze, and a piece of gauze is used to fit the surface of the inner tank. The tighter the fit, the better the protection effect. Because the gauze is soft and easy to deform, it is necessary to arch the flat gauze and roughly constrain it into a spherical surface in advance for operation, such as binding and gathering the edges of the gauze with yarn so that it is roughly constrained into a spherical surface. The gauze also has a certain degree of ductility, so the edge of the gauze is easy to wrinkle and loosen after lamination.

In addition, because black rubber is used for the liner, there is an environmental pollution problem during production, which cannot be completely avoided even if butyl rubber is used. In addition, yarn must be wound on the surface of the inner tank, otherwise the inner tank cannot withstand the air pressure deformation after inflation, causing the ball to bulge and lose its roundness, making it unusable.

Utility model content

In order to overcome the shortcomings of the prior art, the first purpose of the utility model is to provide a hollow sphere, which has the characteristics of environmentally friendly materials, simple structure, fast forming, good roundness and high strength.

The second object of the present utility model is to provide a sports ball using the above-mentioned hollow sphere.

In order to solve the above problems, the technical solution adopted by the first purpose of the utility model is as follows:

A hollow sphere, characterized in that it includes two hemispherical shells; each hemispherical shell includes an embryo body, a gauze and an outer shell; the embryo body is formed into a hemispherical embryo body by a method of heating and molding chemical fiber gauze , the embryo body has a hemispherical cavity, and the hemispherical cavity has an opening through the end face where the center of the embryo body is located; the gauze is composed of several weft yarns wound on the outer surface of the embryo body and The shell is composed of several warp yarns; the shell is a hemispherical shell injection-molded on the outer surface of the gauze of the embryo body by thermoplastic elastic material; the two hemispherical shells are connected by heat welding to form a closed hollow sphere.

Preferably, the gauze is fixedly bonded to the outer surface of the embryo body by glue.

Preferably, patterns are provided on the outer surface of each hemispherical shell.

Preferably, lines are provided on the outer surface of each hemispherical shell.

Preferably, any one of the two hemispherical shells is provided with an air nozzle connecting portion.

In order to solve the above problems, the technical solution adopted by the second purpose of the utility model is as follows:

A sports ball adopting the hollow sphere described in the first object of the utility model.

Preferably, the outer surface of the hollow sphere is printed with a pattern or mounted with a ball skin.

Preferably, the sports ball is a basketball.

Compared with the prior art, the beneficial effects of the utility model are:

1. The embryo body of the present utility model is molded into a hemispherical embryo body by chemical fiber gauze by heating and molding; gauze is made of several weft yarns wound on the outer surface of the embryo and some warp yarns wound on the outer surface of the embryo; The shell is a hemispherical shell injection-molded on the outer surface of the gauze of the embryo body by thermoplastic elastic material; the two hemispherical shells are connected by heat welding to form a closed hollow sphere. Therefore, the hollow sphere described in the utility model has the advantages of environmentally friendly materials, simple structure, fast forming, good roundness and high strength. The hollow sphere formed by the utility model can replace the existing inner tank, and the sports ball can be made without a spherical shell by using the inner tank. Take basketball as an example: directly paste or spray the ball skin on the outer surface of the hollow sphere. .

2. The utility model heats the chemical fiber gauze into a hemispherical embryo, winds the yarn on the embryo, and then injects a hemispherical shell with a thermoplastic elastic material on the hemispherical surface, and heats the two hemispherical shells into a complete hollow. sphere. As a bladder, the traditional process and structure of wrapping gauze on the surface and wrapping the gauze protective layer are replaced by the inner gauze and yarn formed by integral injection molding, which has the advantages of simple process and environmentally friendly materials.

The utility model is described in further detail below in conjunction with accompanying drawing and specific embodiment.

Description of drawings

Fig. 1 is a schematic structural view of the embryo body described in Example 1 of the present invention.

Fig. 2 is a schematic structural view of the embryo body wrapped with gauze according to Embodiment 1 of the present utility model.

Fig. 3 is a structural schematic diagram of the hemispherical shell described in Embodiment 1 of the present utility model.

Fig. 4 is a schematic structural view of the hollow sphere described in Embodiment 1 of the present invention.

Fig. 5 is a schematic diagram of the split structure of the hollow sphere described in Embodiment 1 of the present utility model.

Among them, 100, hollow sphere; 10, hemispherical shell; 11, embryo body; 111, hemispherical cavity; 112, opening; 121, weft; 122, warp; 13, shell; 14, texture; lip, 15.

detailed description

Example 1:

With reference to Fig. 1-5, a kind of hollow sphere 100 described in the present embodiment comprises two hemispherical shells 10; Each hemispherical shell 10 all comprises embryo body 11, gauze and shell 13; The chemical fiber gauze is molded into a hemispherical embryo body by heating and molding, and the embryo body 11 has a hemispherical cavity 111, and the hemispherical cavity 111 has an opening 112 that runs through the end face where the center of the embryo body is located; the gauze is made of Several weft yarns 121 wound on the outer surface of the embryo body 11 and several warp yarns 122 wound on the outer surface of the embryo body 11 are formed; the shell 13 is injection molded on the gauze outer surface of the embryo body 11 The hemispherical shells; the two hemispherical shells 10 are thermally welded to form a closed hollow sphere 100 .

Preferably, the gauze is fixedly bonded to the outer surface of the embryo body 11 by glue. Textures 14 are embedded on the outer surface of the shell 13 of each hemispherical shell 10 . Any one of the two hemispherical shells 10 is provided with a valve connecting portion. A lip 15 is provided around the opening 112 of each hemispherical shell 10 . Such a design can facilitate the heat welding process of the two spherical shells and hemispheres. During the heat welding, the lip edges of the two hemispherical shells are aligned and pressed by the mold, and the heat welding effect is more ideal.

A method for making a hollow sphere, comprising the steps of:

1) Embryo body molding: the chemical fiber gauze is molded into a hemispherical embryo body by heating and molding; the hemispherical embryo body has a hemispherical cavity, and the hemispherical cavity has an opening that runs through the end surface of the embryo body. ;

2) Fixed gauze: put the hemispherical embryo body on the hemispherical mold; wrap several weft yarns on the outer surface of the embryo with chemical fiber yarn, and fix the weft yarns on the outer surface of the embryo at the same time; Wrap several warp yarns on the surface, and fix the warp yarns on the outer surface of the body at the same time; obtain a gauze fixed on the outer surface of the body; when winding the weft and warp yarns, one of the fixing methods of the yarns: dipping the yarns in advance with glue, Then paste on the outer surface of the embryo body.

3) Injection molding shell: put the embryo body processed in step 2 into a hemispherical injection mold, and inject thermoplastic elastic material on the outer surface of the gauze body of the embryo body to obtain a hemispherical shell with a hemispherical cavity; thermoplastic elastic The material is TPU. During injection molding, lines are injection molded on the outer surface of the hemispherical shell. During injection molding, an air nozzle connecting portion communicating with the hemispherical cavity of the hemispherical shell is injection molded on the hemispherical shell. During injection molding, a lip is injection molded around the opening of each hemispherical shell;

4) Heat welding: butt the open ends of the two hemispherical shells, and perform heat welding on the junction of the two to form a closed hollow spherical shell. During heat welding, the lips of the two hemispherical shells are aligned and pressed tightly through the mold. After aligning and pressing, cut off the excess lip. Such a design can facilitate the heat welding process of the two spherical shells and hemispheres. During the heat welding, the lip edges of the two hemispherical shells are aligned and pressed by the mold, and the heat welding effect is more ideal.

A sports ball using the above-mentioned hollow sphere. A ball skin is pasted on the outer surface of the hollow sphere. Preferably, the sports ball is a basketball.

Example 2:

The characteristics of this embodiment are: in the manufacturing method of the hollow sphere, in step 2), when winding the weft yarn and the warp yarn, the second fixing method of the yarn is: the yarn is drawn out from the hot-melt glue nozzle, and the hot-melt glue automatically Viscose yarn is formed after injection in the nozzle, and the viscose yarn is compounded with yarn and attached to the embryo body; others are the same as in Example 1.

Example 3:

The characteristics of this embodiment are: in step 2), the winding method of winding the warp yarn: by moving the hot melt glue nozzle along the longitude direction of the embryo body, the yarn compounded with viscose yarn is wound on the outer surface of the embryo body , forming a number of warp yarns; the winding method of winding weft yarns: the embryo body rotates and gradually rises and falls, so that the yarn is automatically and continuously wound on the outer surface of the embryo body to form several weft yarns. Others are identical with embodiment 2.

Example 4:

The feature of this embodiment is that patterns are provided on the outer surface of each hemispherical shell. Others are the same as in Example 1.

Example 5:

The feature of this embodiment is that the thermoplastic elastic material is one of TPE, TPR, TPO, and TPV. Others are the same as in Example 1.

The hollow sphere described in the utility model is tested, and the test results are as follows:

1. Anti-slip: the surface of the hollow sphere described in the utility model is provided with concave-convex lines, and the surface is astringent but not sticky when exposed to water, and has a delicate hand feeling, anti-skid, and anti-mildew. The hollow sphere described in the utility model is soaked in water, and the ball is picked up nine times with one hand ten times; while the traditional ball is soaked in water, ten times with one hand, it is picked up three times.

2. Waterproof: the hollow sphere described in the utility model is not afraid of soaking in water.

3. High strength: the hollow sphere described in the utility model has no obvious deformation when inflated with an air pressure of 10 pounds. However, when the traditional ball is inflated with an air pressure of 10 pounds, it begins to deform obviously, and the ball skin is degummed and cracked.

4. Bounce: Fall freely from a position of 1.8 meters, and bounce between 1.2 meters and 1.4 meters. The air pressure of the traditional ball needs to be controlled at about 8 pounds, but the air pressure of the hollow sphere described in the utility model can be controlled at about 6 pounds.

5. Air tightness: the hollow sphere described in the utility model and the traditional ball are respectively filled with an air pressure of 8 pounds and left standing for 8 days. The residual air pressure of the traditional ball is 7 pounds (loss 12.5%), while the residual air pressure of the hollow sphere described in the utility model is 7.8 pounds (loss 2.5%). After placing for fourteen days, the remaining air pressure of the traditional ball is 6 pounds (loss 25%), while the remaining air pressure of the hollow sphere described in the utility model is 7.2 pounds (loss 8.75%).

6. Anti-abrasion: Use 150# sandpaper to rub the surface of the ball 180 times, and the PU leather layer on the surface of the traditional ball will be completely worn away. However, the surface of the hollow sphere described in the utility model has no obvious abrasion.

7. The weight of the hollow sphere described in the utility model is stable.

8. Odor: The traditional ball has a glue and rubber smell. And the hollow sphere described in the utility model has no glue smell and rubber smell.

9. The hollow sphere described in the utility model has the characteristics of being environmentally friendly and recyclable.

The above-mentioned embodiments are only preferred embodiments of the present utility model, and cannot be used to limit the scope of protection of the present utility model. The scope of protection required by the utility model.

Claims (5)

1. A hollow sphere, characterized in that it comprises two hemispherical shells; each hemispherical shell comprises an embryo body, a gauze and a shell; the embryo body is molded into a hemispherical shape by chemical fiber gauze An embryo body, the embryo body has a hemispherical cavity, and the hemispherical cavity has an opening that runs through the end face where the center of the embryo body is; The shell is composed of several warp yarns; the shell is a hemispherical shell injection-molded on the outer surface of the gauze body of the embryo body by thermoplastic elastic material; the two hemispherical shells are connected by heat welding to form a closed hollow sphere. 2 . The hollow sphere according to claim 1 , wherein the gauze is fixedly bonded to the outer surface of the embryo body by glue. 3 . 3 . The hollow sphere according to claim 1 , wherein patterns are provided on the outer surface of each hemispherical shell; or lines are provided on the outer surface of each hemispherical shell. 4 . 4. The hollow sphere according to claim 1, characterized in that, any one of the two hemispherical shells is provided with an air nozzle connecting portion. 5. A sports ball using the hollow sphere according to any one of claims 1-4.