CN111973959A

CN111973959A - Manufacturing method of ball, TPU leather, vulcanizing mold and machine-pasted ball

Info

Publication number: CN111973959A
Application number: CN202010967674.4A
Authority: CN
Inventors: 林佑儒
Original assignee: Shenzhen Kela Tuosi Sports Co ltd; Dongkou Changguanlong Sporting Goods Co ltd
Current assignee: SHENZHEN KELA TUOSI SPORTS Co.,Ltd.
Priority date: 2020-09-15
Filing date: 2020-09-15
Publication date: 2020-11-24

Abstract

The invention provides a ball manufacturing method, a TPU leather material, a vulcanizing mold and a machine-pasted ball, relates to the technical field of ball manufacturing, and mainly solves the technical problem that the surface hand feeling of PU or PVC plastic leather is damaged by a vulcanizing ring joint in the ball manufacturing method in the prior art. The manufacturing method of the ball at least comprises the following steps: and cutting the TPU leather into the shape of the spherical leather patch to prepare the TPU spherical leather patch. Placing the TPU ball skin patch on a patch die, then placing the middle tire in the die, and pressurizing the middle tire to ensure that the TPU ball skin patch is adhered on the middle tire; placing the middle tire adhered with the TPU ball skin patch in a vulcanization mold with a grain, and remolding the TPU ball skin adhered on the middle tire through the vulcanization mold with the grain; and taking out the product, cooling and finishing the surface. The method for sticking the ball cover can destroy the hand feeling of the surface of the ball cover, and can form lines for enhancing the hand feeling on the surface of the ball cover during vulcanization, thereby simplifying the manufacturing process and shortening the manufacturing period.

Description

Manufacturing method of ball, TPU leather, vulcanizing mold and machine-pasted ball

Technical Field

The invention relates to the technical field of rubber balls, in particular to a ball manufacturing method, a TPU leather material, a vulcanizing mold and a machine-pasted ball.

Background

The existing procedure of sticking basketball on machine is to coat the vulcanized middle core of basketball with oily glue and then cut PU or PVC leather into eight pieces of basketball sticking pieces. Further, the basketball patch is placed within the mold and the cut basketball patch is positioned through the mold. And further placing the middle tire pasted with the basketball patch into a mold, and closing the upper mold and the lower mold. Then, the middle tire in the vulcanizing mold is further internally pressurized, so that the middle tire is extruded from inside to outside to stick the basketball skin patch on the middle tire. The bonded basketball is put into a vulcanizing mould, and after heating, pressurizing and vulcanizing, the basketball sheet can be bonded on the middle tyre.

The existing machine-pasted basketball at least has the following defects in the production process:

basketball on the market today uses PU or PVC type of plastic leather that cannot accommodate the high temperatures of vulcanization. Specifically, the middle tyre stuck with the basketball patch needs to be heated to 140 ℃ and kept for more than 5 minutes to complete the vulcanization in the vulcanization process. Because of the higher vulcanizing temperature, the capillary holes or gaps originally used for increasing the hand feeling and the softness of the surface of the PU or PVC plastic leather can be damaged, and further the hand feeling and the hardness of the PU or PVC plastic leather can be damaged.

Disclosure of Invention

One of the purposes of the invention is to provide a ball manufacturing method, which solves the technical problem that the surface hand feeling of PU or PVC plastic leather is damaged by adding a sulfur ring in the ball manufacturing method in the prior art. Advantageous effects can be achieved in preferred embodiments of the present invention, as described in detail below.

In order to achieve the purpose, the invention provides the following technical scheme:

the manufacturing method of the ball at least comprises the following steps:

s1, forming the ball skin patch, and cutting the TPU leather into the shape of the ball skin patch to manufacture the TPU ball skin patch.

S2, adhering a TPU ball skin paster, placing the TPU ball skin paster on a paster mold, then placing the middle tire in the mold, and pressurizing the middle tire to ensure that the TPU ball skin paster is adhered on the middle tire;

s3, vulcanizing and forming, namely placing the middle tire adhered with the TPU ball skin patch into a vulcanizing mold with a grain, and remolding the TPU ball skin adhered on the middle tire through the vulcanizing mold with the grain;

and S4, cooling and trimming, taking out the product, cooling and trimming the surface.

In a further preferred or alternative technical solution of the present invention: and S11, edging the TPU ball skin patch cut into the shape of the basketball sheet to reduce the thickness of the edge of the TPU ball skin patch.

In a further preferred or alternative embodiment of the invention, the sulphurization temperature is 160 ℃.

In a further preferred or alternative technical scheme of the present invention, the TPU ball skin used in the above preferred technical scheme at least includes an outer skin layer and a buffer layer, the outer skin layer and the buffer layer are bonded to each other, and the outer skin layer is made of TPU material.

Further preferably, when the TPU covering is used in the above method of making a ball, the outer cover layer is located on the side facing away from the middle tube.

The utility model provides a TPU cladding, includes skin layer and buffer layer, and skin layer and buffer layer bond each other, and the skin layer is made for the TPU material, and the skin layer is located the one side that deviates from the well child.

In a further preferable or optional technical scheme of the invention, the buffer layer in the TPU leather is made of any one of TPU foaming material, PU, PVC, EVA and TPE.

In a further preferable or optional technical scheme, the TPU leather further comprises a reinforcing layer, and the reinforcing layer is adhered to the surface of the buffer layer, which is away from the outer skin layer.

In a further preferable or optional technical scheme of the invention, the reinforcing layer in the TPU leather is a non-woven fabric and/or a non-woven fabric.

The utility model provides a vulcanization mould utensil, this vulcanization mould utensil inner wall is provided with the shaping groove, shaping groove and ball skin surface line looks adaptation.

A machine-pasted ball comprises a TPU ball skin and a middle tire, wherein the TPU ball skin is pasted on the middle tire.

In a further preferred or alternative embodiment of the invention, the edge of the TPU ball skin patch penetrates into the middle carcass.

In a further preferred or alternative technical scheme of the invention, the middle tire is made of TPU foaming material.

The manufacturing method of the ball provided by the invention at least has the following beneficial technical effects:

the TPU leather is used for manufacturing the TPU ball leather patch, the thermoplasticity of the TPU leather is fully utilized, and the hand feeling of the surface of the ball leather is prevented from being damaged by the high temperature of a vulcanization link. And through set up the line with ball surface line looks adaptation in the vulcanization mould utensil, and then make the vulcanization mould utensil still keep away from the line of reinforcing feel with the TPU ball skin paster one side back mould when the vulcanization, reach the preparation flow of simplifying the ball, shorten the preparation cycle of ball.

In a further preferred or optional embodiment of the present invention, after the TPU skin material is cut into the TPU ball skin patch, the edge of the TPU ball skin patch is chamfered, so that the edge of the TPU ball skin patch is thinned, and after the TPU ball skin patch is heated in a vulcanization mold, the edge portion of the TPU ball skin patch is melted under the action of high temperature, and the melted edge portion of the TPU ball skin patch is penetrated into the middle tire layer due to the pressurization in the middle tire and the extrusion from inside to outside of the middle tire. And further, the TPU ball skin edge part can be prevented from being layered, and the service life of the ball is prolonged.

The TPU leather provided by the invention is made into the outer skin layer by the TPU material, so that the TPU leather can be used for the manufacturing method of the ball. Furthermore, a buffer layer is added into the TPU leather, so that the elasticity of the TPU leather after being made into the ball cover can be improved.

The forming groove is formed in the inner wall of the vulcanizing mold, so that the surface of the ball skin can be remolded into lines capable of enhancing hand feeling while vulcanizing, one mold can be used for two purposes, namely vulcanizing and remolding the lines of the ball skin, the process is simplified, and the manufacturing period of the ball is shortened.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a flow chart of a method of making a ball according to a first preferred embodiment of the present invention;

FIG. 2 is a flow chart of a method of making a ball according to a second preferred embodiment of the present invention;

FIG. 3 is a schematic illustration of a method of making a ball according to a preferred embodiment of the present invention;

FIG. 4 is a schematic view of a preferred embodiment of the vulcanization molding of the present invention;

FIG. 5 is a schematic view of a preferred embodiment of the invention with the cover edge penetrating the middle tire;

FIG. 6 is a schematic diagram of a vulcanization step in a process of mechanically attaching a ball skin in the prior art;

FIG. 7 is a partial schematic view of a prior art cover bonded to a center tire;

FIG. 8 is a schematic view of a preferred embodiment ball of the present invention;

FIG. 9 is a schematic illustration of a TPU skin of a preferred embodiment of the invention;

FIG. 10 is a schematic cut-away view of a ball according to a preferred embodiment of the present invention;

FIG. 11 is a schematic cut-away view of a prior art ball;

FIG. 12 is a schematic representation of a vulcanization mold according to a preferred embodiment of the present invention.

In the figure: 1-TPU ball skin paster; 2-an outer skin layer; 3-a buffer layer; 4-a reinforcing layer; 5-vulcanizing the mold; 6-middle tyre layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

Referring to fig. 1 to 3, in a preferred or alternative embodiment of the present invention, a method for manufacturing a ball at least includes the steps of:

s1, forming the ball skin patch, cutting the TPU leather into the shape of the ball skin patch to manufacture the TPU ball skin patch 1.

It should be noted that the TPU leather described in the above embodiments may be a single layer leather made of TPU material, or may be a multi-layer composite leather made of TPU material.

S2, adhering the TPU ball skin paster 1, placing the TPU ball skin paster 1 on a paster mold, then placing the middle tire in the mold, and pressurizing the middle tire to ensure that the TPU ball skin paster 1 is adhered on the middle tire.

In a preferred or alternative embodiment, the middle tire and the TPU ball skin patch 1 are adhered through oily glue.

Specifically, the TPU ball skin patch 1 is laid in a patch die, an upper die and a lower die in the patch die are covered, so that the TPU ball skin patch 1 is pasted on a middle tire, the middle tire pasted with the TPU ball skin patch 1 is taken out, and the pasting of the TPU ball skin patch 1 is completed.

As a preferred or alternative embodiment, the TPU cover patch 1 is adhered to the TPU foamed middle tire. Specifically, the middle tire layer in the TPU foamed middle tire is made of TPU foamed materials. The middle tire layer is made of TPU (thermoplastic polyurethane) foam without vulcanizing the middle tire in the manufacturing process, so that twice vulcanizing in the ball manufacturing process is reduced to once vulcanizing, and harmful gas generated in the manufacturing process is reduced. Compared with the common middle tire, the TPU foamed middle tire has more excellent elasticity.

It should be noted that, the TPU is foamed into the thermoplastic material, so the influence of the environmental temperature and humidity during the process of foaming the TPU is small, and the stability of the product quality can be improved.

And S3, vulcanizing and forming, namely placing the middle tire adhered with the TPU ball skin patch 1 in a vulcanizing mold with a line, and remolding the TPU ball skin adhered on the middle tire through the vulcanizing mold with the line.

Preferably, the temperature for vulcanization molding in the above examples is 160 ℃. When the vulcanizing temperature reaches 160 ℃, one side of the TPU ball skin paster 1 close to the inner wall of the vulcanizing mold is in semi-liquidization, and because the TPU material has thermoplasticity, compared with PU or PVC ball skin in the prior art, the surface hardness of the TPU ball skin cannot be hardened due to the high temperature of 160 ℃, and is further suitable for high-temperature vulcanizing.

Referring to fig. 3, 4 and 12, as a preferred or alternative embodiment, the vulcanizing mold is provided with a forming groove on the inner wall, so that the surface of the TPU ball skin patch 1 attached to the inner wall of the vulcanizing mold is melted and injection-molded to form a surface with particles for enhancing hand feeling.

It should be noted that, referring to fig. 6, in the existing method for attaching a ball cover, grain lines for enhancing hand feeling are added on the surface of the ball cover, and then in the vulcanization process, the grains on the surface of the ball cover deform due to high temperature, thereby destroying the hand feeling on the surface of the ball cover. In addition, PU or PVC ball covers in the prior art do not have thermoplasticity, and the surface hardness of the ball covers is increased during vulcanization, so that the surface hand feeling is further reduced.

It should be noted that, in the prior art, when the PU or PVC ball skin is attached by machine, the unit time is 10min to 14min, and when the ball skin is attached by the above method, the unit time can be 5min to 7min, thereby shortening the manufacturing cycle of the ball.

As a further preferred or alternative embodiment of the present invention, the TPU cover sheet 1 cut into the shape of a basketball sheet is chamfered to reduce the thickness of the edge of the TPU cover sheet 1.

In the above embodiment, referring to fig. 5, after the TPU ball skin patch 1 is chamfered, the thickness of the edge portion is reduced, and the edge portion of the TPU ball skin patch 1 is in a hot-melt state during the vulcanization operation. Furthermore, when in vulcanization operation, the middle tire is internally pressurized, so that the middle tire is internally and externally extruded, the edge part of the TPU ball skin patch 1 is further promoted to permeate into the middle tire layer, and the ball can be split in the using process, so that the service life of the ball is prolonged.

It should be noted that, referring to fig. 7 and 11, the edge of the PU or PVC ball skin in the prior art is not melted when the ball skin is pasted on the machine, and then the PU or PVC ball skin in the prior art is pasted with the middle tire layer completely by the oil-based adhesive, and as the usage time increases, the edge of the PU or PVC ball skin is easy to peel, and the service life of the ball is shortened.

Referring to fig. 3, 9 and 10, in a preferred or alternative embodiment of the present invention, the TPU skin material includes at least an outer skin layer 2 and a cushion layer 3, the outer skin layer 2 and the cushion layer 3 are bonded to each other, the outer skin layer 2 is made of TPU, and the outer skin layer 2 is located on a side facing away from the middle tire.

In a preferred or alternative embodiment, the outer skin layer 2 has a thickness of 0.08mm to 0.1 mm. The buffer layer 3 has a thickness of 0.6mm to 0.4 mm.

Referring to fig. 9 and 10, as a preferred or alternative embodiment, the outer skin layer 2 and the buffer layer 3 are bonded by a toluene-resistant glue.

In a further preferred or alternative embodiment of the present invention, the buffer layer 3 may be made of any one of TPU foam, PU, PVC, EVA and TPE.

Referring to fig. 9 and 10, in a further preferred or alternative embodiment, the TPU skin further includes a reinforcing layer 4, and the reinforcing layer 4 is adhered to the surface of the cushioning layer 3 facing away from the outer skin layer 2.

Preferably, the reinforcing layer 4 is made of a nonwoven fabric or a nonwoven fabric. Further preferably, the thickness of the reinforcing layer 4 is 0.09mm to 0.1 mm.

Referring to fig. 8 to 10, in a further preferred or alternative embodiment, the TPU shell in any of the above examples can be made into a cover by the ball making process of the present invention.

Referring to fig. 12, in a preferred or alternative embodiment of the present invention, the inner wall of the vulcanizing mold 5 is provided with a forming groove, and the forming groove is matched with the surface texture of the ball skin.

In a preferred or alternative embodiment of the present invention, the shape of the forming groove on the inner wall of the vulcanizing mold 5 is adapted to the grain pattern of the ball skin surface for enhancing hand feeling, so that the surface of the ball skin is injection-molded with the grain pattern through the forming groove on the inner wall of the vulcanizing mold 5.

In a preferred or alternative embodiment, the vulcanization mold 5 described above is suitable for use in the method for manufacturing the ball according to the invention.

As a preferred or alternative embodiment of the present invention, the machine-attachable ball of the present invention is made by the method of making the ball described in any of the above embodiments.

As a preferred or alternative embodiment of the present invention, the machine-attachable ball of the present invention is made of the TPU leather described in any one of the above embodiments.

As a preferred or alternative embodiment of the invention, the edge of the TPU cover patch 1 penetrates into the carcass ply 6.

In the preferred embodiment, the edge of the TPU ball skin patch 1 penetrates into the middle tire layer 6 to effectively increase the stability between the ball skin and the middle tire, prevent the edge part of the ball skin from peeling, and further prolong the service life of the ball.

In a further preferred or alternative embodiment of the invention, the TPU ball cover patch 1 may be made from the TPU cover material described in any one of the preferred embodiments of the invention by the method of making the ball described herein.

In a further preferred or alternative embodiment of the invention, the TPU cover patch 1 includes at least one outer cover layer 2 of TPU material.

As a further preferred or alternative embodiment of the present invention, the surface of the TPU ball skin patch 1 facing away from the middle tire is provided with a hand-enhanced grain texture. Further preferably, the grain lines on the surface of the TPU spherical skin patch 1 are made by the vulcanizing mould 5 provided by the invention.

As a further preferred or alternative embodiment of the invention, the TPU cover patch 1 further comprises a cushioning layer 3. Further preferably, the buffer layer 3 may be made of any one of TPU foam, PU, PVC, EVA and TPE.

In a further preferred or alternative embodiment of the invention, the TPU cover patch 1 further comprises a reinforcing layer 4. Preferably, the reinforcing layer 4 is a nonwoven fabric and/or a nonwoven fabric.

In a further preferred or alternative embodiment of the invention, the middle layer 6 is made of TPU foam.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. The manufacturing method of the ball is characterized by at least comprising the following steps:

forming the ball skin patch, cutting the TPU leather into the shape of the ball skin patch to prepare the TPU ball skin patch (1);

sticking a TPU ball skin patch (1), placing the TPU ball skin patch (1) on a patch die, then placing a middle tire in the die, and pressurizing the middle tire to enable the TPU ball skin patch (1) to be stuck on the middle tire;

vulcanizing and molding, namely placing the middle tire adhered with the TPU ball skin patch (1) in a vulcanizing mold with a grain, and remolding the TPU ball skin adhered on the middle tire through the vulcanizing mold with the grain;

and (5) cooling and trimming, taking out the product, cooling and trimming the surface.

2. A method for manufacturing a ball according to claim 1, wherein the TPU cover sheet (1) cut out in the shape of a basketball hoop is chamfered so that the thickness of the edge of the TPU cover sheet (1) is reduced.

3. A method of making a ball as claimed in claim 1 wherein the temperature of the sulphurization is 160 ℃.

4. A TPU skin used in the process of any one of claims 1 to 3, characterized in that the TPU skin comprises at least an outer skin layer (2) and a breaker layer (3), the outer skin layer (2) and the breaker layer (3) being bonded to each other, the outer skin layer (2) being made of TPU material.

5. TPU leather according to claim 4, characterized in that the cushioning layer (3) is made of any one of TPU foamed material, PU, PVC, EVA and TPE.

6. TPU leather according to claim 4, characterized in that the TPU leather further comprises a reinforcing layer (4), and the reinforcing layer (4) is adhered to the side of the cushioning layer (3) facing away from the outer skin layer (2).

7. A vulcanization mould for use in the method according to any one of claims 1 to 3, characterized in that the vulcanization mould (5) is provided with shaping grooves on its inner wall, which shaping grooves are adapted to the surface texture of the ball skin.

8. A machine-bonded ball wherein the cover is made by the method of any one of claims 1 to 3.

9. Machine-bonded ball according to claim 8, characterized in that the edge of the TPU ball skin patch (1) penetrates into the middle-ply (6).

10. Machine-pasted ball according to claim 9, characterized in that the middle-ply (6) is made of TPU foamed material.