CN116271746B - Double-layer ball and preparation method thereof - Google Patents
Double-layer ball and preparation method thereof Download PDFInfo
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- CN116271746B CN116271746B CN202310172739.XA CN202310172739A CN116271746B CN 116271746 B CN116271746 B CN 116271746B CN 202310172739 A CN202310172739 A CN 202310172739A CN 116271746 B CN116271746 B CN 116271746B
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- ball
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- cover
- ball cover
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- 238000002360 preparation method Methods 0.000 title abstract description 9
- 239000000463 material Substances 0.000 claims description 55
- 239000000872 buffer Substances 0.000 claims description 28
- 239000000758 substrate Substances 0.000 claims description 28
- 239000004744 fabric Substances 0.000 claims description 26
- 230000003313 weakening effect Effects 0.000 claims description 20
- 239000010985 leather Substances 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 11
- 229920001971 elastomer Polymers 0.000 claims description 8
- 229920000728 polyester Polymers 0.000 claims description 7
- 239000004745 nonwoven fabric Substances 0.000 claims description 6
- 238000004080 punching Methods 0.000 claims description 6
- 238000009958 sewing Methods 0.000 claims description 6
- 238000013329 compounding Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 4
- 229920002972 Acrylic fiber Polymers 0.000 claims description 3
- 229920000742 Cotton Polymers 0.000 claims description 3
- 239000004433 Thermoplastic polyurethane Substances 0.000 claims description 3
- 239000004816 latex Substances 0.000 claims description 3
- 229920000126 latex Polymers 0.000 claims description 3
- 239000002649 leather substitute Substances 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 239000004800 polyvinyl chloride Substances 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 abstract 2
- 238000000576 coating method Methods 0.000 abstract 2
- 239000010410 layer Substances 0.000 description 120
- 230000003014 reinforcing effect Effects 0.000 description 8
- 239000002344 surface layer Substances 0.000 description 3
- 239000006173 Good's buffer Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B41/00—Hollow inflatable balls
- A63B41/02—Bladders
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B41/00—Hollow inflatable balls
- A63B41/08—Ball covers; Closures therefor
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B45/00—Apparatus or methods for manufacturing balls
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Laminated Bodies (AREA)
Abstract
The invention relates to the field of sport ball preparation and discloses a double-layer ball and a preparation method thereof, wherein the double-layer ball comprises a ball bladder, an inner ball skin, an outer ball skin and an air charging nozzle, the inner ball skin is used for coating the ball bladder, the inner side surface of the inner ball skin is glued with the outer surface of the ball bladder, the outer ball skin is used for coating the inner ball skin, the inner side surface of the outer ball skin is attached with the outer side surface of the inner ball skin, an air charging hole is formed in the ball bladder, one end of the air charging nozzle is embedded into the air charging hole, and the other end of the air charging nozzle penetrates through the inner ball skin and the outer ball skin and protrudes out of the outer surface of the outer ball skin.
Description
Technical Field
The invention relates to the field of sport ball preparation, in particular to a double-layer ball and a preparation method thereof.
Background
Ball games are important components of sports industry, are widely developed competitive sports and mass sports, and mainly comprise basketball, football, volleyball and the like. The traditional ball middle tyre is generally composed of an inner container, a yarn winding layer (wrapped outside the inner container), an outer skin layer (wrapped outside the yarn winding layer) and an air tap. The outer layer structure is simpler in composition, poor in wear resistance, and in the frequent use process, the outer layer ball skin is too fast, once the surface layer material is worn out and damaged in the use process, whether the inflatable bladder is intact or not, the whole ball is required to be discarded, a large amount of resource materials are wasted, and the service life of the product ball is limited.
Disclosure of Invention
Therefore, it is necessary to provide a double-layer ball and a preparation method thereof, which solve the problems that after the outer skin layer of the existing sport ball is damaged, the sport ball can only be discarded entirely, resources are wasted, and the service life of the sport ball is affected.
In order to achieve the above purpose, the invention provides a double-layer ball, which comprises a ball bladder, an inner layer ball cover, an outer layer ball cover and an air charging nozzle, wherein the inner layer ball cover is used for covering the ball bladder, the inner side surface of the inner layer ball cover is glued with the outer surface of the ball bladder, the outer layer ball cover is used for covering the inner layer ball cover, the inner side surface of the outer layer ball cover is attached with the outer side surface of the inner layer ball cover, the ball bladder is provided with the air charging hole, one end of the air charging nozzle is embedded into the air charging hole, and the other end of the air charging nozzle penetrates through the inner layer ball cover, the outer layer ball cover and protrudes out of the outer surface of the outer layer ball cover.
Further, the bladder is an inflatable bladder, a yarn bladder, a cloth bladder or a ball middle tire, the inflatable bladder is a rubber bladder, a PVC bladder, a TPU bladder or a latex bladder, the yarn bladder is wound with yarns outside the inflatable bladder, the cloth bladder is made of an inflatable bladder outer cloth, and the ball middle tire is made of a rubber sheet attached to the surface of the cloth bladder or the yarn bladder.
Further, the inner ball cover is formed by compounding more than one layer of materials, the outer ball cover is formed by compounding more than one layer of materials, and the materials of the inner ball cover and the outer ball cover are the same or different.
Further, the inner ball cover comprises a first plane material layer, a first buffer layer and a first reinforced substrate layer from outside to inside, the first plane material layer, the first buffer layer and the first reinforced substrate layer are tightly adhered, the outer ball cover comprises a second plane material layer, a second buffer layer and a second reinforced substrate layer from outside to inside, and the second plane material layer, the second buffer layer and the second reinforced substrate layer are tightly adhered.
The surface material layer is used for guaranteeing the wear resistance, cold resistance, new water absorption and anti-striking performance of the outer surface of the inner ball cover, the buffer layer is made of materials with good buffer performance and rebound resilience, and the reinforcing substrate layer is used for reinforcing the tensile strength of the inflatable ball.
Further, the materials of the first surface material layer and the second surface material layer are PU, PVC, TPU, synthetic leather or leather materials, the materials of the first buffer layer and the second buffer layer are EVA, TPE, SBR or RB, and the materials of the first reinforced substrate layer and the second reinforced substrate layer are non-woven fabrics, polyester fabrics, oxford fabrics, pound fabrics, cotton fabrics, acrylic fibers or cotton-polyester blends.
Further, an annular flange is arranged at the other end of the charging connector, and the annular flange is clamped with the outer ball cover. The flange on the charging connector clamps the inner ball cover and the outer ball cover to form a double-layer ball.
Further, the annular flange has a tapered cross section. Ensuring the good roundness of the surface of the double-layer ball.
Further, the outer end of the charging connector protrudes from the annular flange to extend to form a mounting rod. The installation rod is convenient for a worker to take, put and install the charging connector, and after the double-layer ball is finished, the convex installation rod on the charging connector is cut off when the double-layer ball is used.
Further, a first weakening groove is formed between the mounting rod and the annular flange, and the first weakening groove is an annular groove. The first weakening groove is convenient for manually breaking the mounting rod and is convenient for using the double-layer ball.
Further, a second weakening groove is formed in the charging connector, the second weakening groove is an annular groove, and the second weakening groove corresponds to the curved surface where the outer surface of the inner layer ball cover is located. When the outer ball cover is torn off, the air charging nozzle can be broken off from the second weakening groove, so that the ball bladder and the inner ball cover form a new air charging ball to be used.
The preparation method of the double-layer ball comprises the following steps:
(1) Manufacturing a bladder;
(2) Punching out an inner ball leather ball sheet, and adhering the inner ball leather ball sheet to the outer surface of the bladder to form an inner ball;
(3) Punching out outer ball leather ball sheets, sewing the outer ball leather ball sheets with each other to form an outer ball leather, and arranging the inner ball in the outer ball leather during sewing to enable the outer ball leather to cover the inner ball to form a double-layer ball;
(4) An air charging nozzle is inserted.
The technical scheme has the following beneficial effects:
In the invention, the outer ball and the inner ball are not glued by using the gluing layer, but are only clung to each other, when the outer ball skin is damaged, the outer ball skin can be pulled out to obtain the complete inner ball body, and the inner ball body is reused, so that the using function is not influenced, the service life of the product is prolonged, and the waste of material resources is avoided.
Drawings
FIG. 1 is a cross-sectional view of a double-layered ball according to an embodiment;
fig. 2 is a partial cross-sectional view of a double layer ball according to an embodiment.
FIG. 3 is a cross-sectional view of an embodiment of an inflation nozzle;
FIG. 4 is a cross-sectional view of another embodiment of an inflation nozzle;
fig. 5 is a partial cross-sectional view of another embodiment of a double layer ball.
FIG. 6 is a block diagram of different ball segment combinations according to the embodiment, and FIGS. 6A-E are block diagrams of different ball segment combinations;
Reference numerals illustrate:
1. A bladder; 11. an air filling hole; 2. an inner layer ball cover; 21. a first facestock layer; 22. a first buffer layer; 23. a first reinforcing substrate layer; 3. an outer ball cover; 31. a second facestock layer; 32. a second buffer layer; 33. a second reinforcing substrate layer; 4. an air charging nozzle; 41. an annular flange; 42. a mounting rod; 43. a first weakening groove; 44. a second weakening groove; 5. a groove; 51. a convex strip.
Detailed Description
In order to describe the technical content, constructional features, achieved objects and effects of the technical solution in detail, the following description is made in connection with the specific embodiments in conjunction with the accompanying drawings.
Referring to fig. 1-3, the embodiment discloses a double-layer ball, which comprises a ball bladder 1, an inner ball cover 2, an outer ball cover 3 and an air charging nozzle 4, wherein the inner ball cover 2 is used for wrapping the ball bladder 1, the inner side surface of the inner ball cover 2 is glued with the outer surface of the ball bladder 1, the outer ball cover 3 is used for wrapping the inner ball cover 2, the inner side surface of the outer ball cover 3 is attached with the outer side surface of the inner ball cover 2, the ball bladder 1 is provided with an air charging hole 11, one end of the air charging nozzle 4 is embedded into the air charging hole 11, the other end of the air charging nozzle 4 penetrates through the inner ball cover 2 and the outer ball cover 3 and protrudes out of the outer surface of the outer ball cover 3, the other end of the air charging nozzle 4 is provided with an annular flange 41, and the annular flange 41 is clamped with the outer ball cover 3. In this embodiment, the outer ball cover 3 is fixed by the annular flange 41, and those skilled in the art can also use other feasible methods to further fix the outer ball cover 3.
The ball bladder 1 is an inflatable bladder, a yarn bladder, a cloth bladder or a ball middle tire, the inflatable bladder is a rubber bladder, a PVC bladder, a TPU bladder or a latex bladder, the yarn bladder is formed by winding yarns outside the inflatable bladder, the cloth bladder is formed by attaching cloth outside the inflatable bladder, and the ball middle tire is formed by attaching a rubber sheet on the surface of the cloth bladder or the yarn bladder.
The inner ball cover 2 comprises a first surface material layer 21, a first buffer layer 22 and a first reinforced substrate layer 23 from outside to inside, the first surface material layer 21, the first buffer layer 22 and the first reinforced substrate layer 23 are tightly adhered, the outer ball cover 3 comprises a second surface material layer 31, a second buffer layer 32 and a second reinforced substrate layer 33 from outside to inside, and the second surface material layer 31, the second buffer layer 32 and the second reinforced substrate layer 33 are tightly adhered.
The surface material layer is used for guaranteeing the wear resistance, cold resistance, new water absorption and anti-striking performance of the outer surface of the inner ball cover 2, the buffer layer is made of materials with good buffer performance and rebound resilience, and the reinforcing substrate layer is used for reinforcing the tensile strength of the inflatable ball.
The materials of the first surface material layer 21 and the second surface material layer 31 are PU, PVC, TPU, synthetic leather or leather materials, the materials of the first buffer layer 22 and the second buffer layer are EVA, TPE, SBR or RB, and the materials of the first reinforced substrate layer 23 and the second reinforced substrate layer 33 are non-woven fabrics, polyester fabrics, oxford fabrics, pound fabrics, cotton fabrics, acrylic fibers or cotton-polyester blends.
In the specific manufacturing process, the total thickness of the inner ball cover 2 is 1.5-6MM, and the total thickness of the outer ball cover 3 can be slightly thicker than the material of the inner ball by 1-3MM or slightly thinner by 1-3MM.
In this embodiment, the bladder 1 is a rubber bladder inflatable bladder, the inner layer bladder 2 comprises a PU first surface material layer 21, an EVA first buffer layer 22 and a non-woven fabric first reinforcing substrate layer 23 from outside to inside, and the outer layer bladder 3 comprises a PU second surface material layer 31, an EVA second buffer layer 32 and a non-woven fabric second reinforcing substrate layer 33 from outside to inside.
In another embodiment, the bladder 1 is a yarn bladder, the inner layer ball cover 2 comprises a PVC first surface material layer 21, a TPE first buffer layer 22 and a polyester fabric first reinforced substrate layer 23 from outside to inside, and the outer layer ball cover 3 comprises a PU second surface material layer 31, an EVA second buffer layer 32 and a non-woven fabric second reinforced substrate layer 33 from outside to inside.
In another embodiment, the bladder 1 is a middle ball carcass, the middle ball carcass is made by attaching a rubber sheet on the surface of a fabric bladder, the inner ball skin 2 is composed of a TPU first surface material layer 21, an SBR first buffer layer 22 and an oxford first reinforced substrate layer 23 from outside to inside, and the outer ball skin 3 is composed of a PU second surface material layer 31, an EVA second buffer layer 32 and an acrylic second reinforced substrate layer 33 from outside to inside.
In another embodiment, the inner ball cover is made of a PU material layer, and the outer ball cover is made of a leather material layer. The annular flange 41 is tapered in cross section. Ensuring the good roundness of the surface of the double-layer ball. The outer end of the charging nozzle 4 extends to form a mounting rod 42 from a protruding annular flange 41. The mounting rod 42 is convenient for a worker to take and put the mounting air charging connector 4, and after the double-layer ball is finished, the mounting rod 42 protruding from the air charging connector 4 is cut off during use.
In another embodiment, as shown in fig. 4, a first weakening groove 43 is provided between the mounting rod 42 and the annular flange 41, the first weakening groove 43 being an annular groove. The first weakening groove 43 facilitates manual breaking of the mounting bar 42, facilitating use of the double-layered ball. The charging connector 4 is provided with a second weakening groove 44, the second weakening groove 44 is an annular groove, and the second weakening groove 44 corresponds to the curved surface of the outer surface of the inner layer ball cover 2. When the outer ball cover 3 is torn off, the air charging nozzle 4 can be broken off from the second weakening groove 44, so that the ball bladder 1 and the inner ball cover 2 form a new air charging ball for use.
The inner ball cover 2 and the outer ball cover 3 are provided with a plurality of grooves 5, and the grooves 5 of the inner ball cover 2 and the outer ball cover 3 are staggered. When the double-layer ball is used as basketball, the grooves 5 are used for facilitating grabbing of the ball.
In another embodiment, as shown in fig. 5, a plurality of raised strips 51 are formed on the inner surface of the outer cover 3, and the raised strips 51 are adapted to the grooves 5 of the inner cover 2. The convex strips 51 are matched with the grooves 5, so that the inner ball cover 2 and the outer ball cover 3 can be positioned and fixed conveniently.
The preparation method of the double-layer ball comprises the following steps:
(1) Manufacturing a bladder 1;
(2) Punching out the inner ball cover 2 ball pieces, and adhering the inner ball cover 2 ball pieces to the outer surface of the bladder 1 to form an inner ball;
(3) Punching out the outer ball cover 3 ball pieces, sewing the outer ball cover 3 ball pieces with each other to form an outer ball cover 3, and arranging the inner ball in the outer ball cover 3 during sewing, so that the outer ball cover 3 covers the inner ball to form a double-layer ball;
The surface layer material of the inner sphere is punched into the required spherical sheet shape combination as shown in fig. 6: basketball shape, football pentagon, hexagon, volleyball piece shape, etc. are only illustrated by the figures, and the shapes are not illustrated, such as fan shape, plum blossom shape, waist drum shape.
The surface layer material of the outer ball is punched into the required ball sheet shape combination as shown in fig. 6: the shapes of basketball, football pentagon, hexagon, volleyball piece and the like are just exemplified by figures, and the shapes of the volleyball pieces can be consistent with those of inner-layer balls and can be matched with those of different volleyball pieces without being exemplified by sectors, quincuncials, waist drums and the like.
When the outer ball cover 3 is sewn by using the outer ball cover ball pieces with various shapes, the outer ball cover 3 ball pieces can be sewn to form two half ball covers, then the inner ball is clamped into the two half ball covers, and then the two half ball covers are sewn.
(4) The charging nozzle 4 is inserted, and the annular flange 41 on the charging nozzle 4 is clamped with the outer surface of the outer ball cover 3.
In the invention, the outer ball and the inner ball are not glued by using a gluing layer, but are only clung to each other, in addition, the inner ball cover 2 and the outer ball cover 3 are clamped with each other by using the flange on the charging connector 4 to form the double-layer ball, when the outer ball cover 3 is damaged, the outer ball cover 3 can be pulled out to obtain a complete inner ball body, and the inner ball body is reused, so that the service life of the product is prolonged, and the waste of material resources is avoided.
When the product is specifically used, the double-layer ball can be used as a conventional game ball, and after the outer ball cover 3 is worn, the outer layer is removed, so that the double-layer ball can be used as a training ball.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the statement "comprising … …" or "comprising … …" does not exclude the presence of additional elements in a process, method, article, or terminal device that includes the element. Further, herein, "greater than," "less than," "exceeding," and the like are understood to not include the present number; "above", "below", "within" and the like are understood to include this number.
While the embodiments have been described above, other variations and modifications will occur to those skilled in the art once the basic inventive concepts are known, and it is therefore intended that the foregoing description and drawings illustrate only embodiments of the invention and not limit the scope of the invention, and it is therefore intended that the invention not be limited to the specific embodiments described, but that the invention may be practiced with their equivalent structures or with their equivalent processes or with their use directly or indirectly in other related fields.
Claims (4)
1. The double-layer ball is characterized by comprising a ball bladder, an inner layer ball cover, an outer layer ball cover and an air charging nozzle, wherein the inner layer ball cover covers the ball bladder, the inner side surface of the inner layer ball cover is glued with the outer surface of the ball bladder, the outer layer ball cover covers the inner layer ball cover, the inner side surface of the outer layer ball cover is attached to the outer side surface of the inner layer ball cover, the ball bladder is provided with the air charging hole, one end of the air charging nozzle is embedded into the air charging hole, and the other end of the air charging nozzle penetrates through the inner layer ball cover, the outer layer ball cover and protrudes out of the outer surface of the outer layer ball cover;
the inner ball cover is formed by compounding more than one layer of materials, the outer ball cover is formed by compounding more than one layer of materials, and the materials of the inner ball cover and the outer ball cover are the same or different;
the inner ball cover comprises a first plane material layer, a first buffer layer and a first reinforced substrate layer from outside to inside, the first plane material layer, the first buffer layer and the first reinforced substrate layer are tightly adhered, the outer ball cover comprises a second plane material layer, a second buffer layer and a second reinforced substrate layer from outside to inside, and the second plane material layer, the second buffer layer and the second reinforced substrate layer are tightly adhered;
the materials of the first surface material layer and the second surface material layer are PU, PVC, TPU, synthetic leather or leather materials, the materials of the first buffer layer and the second buffer layer are EVA, TPE, SBR or RB, and the materials of the first reinforced substrate layer and the second reinforced substrate layer are non-woven fabrics, polyester fabrics, oxford fabrics, pound fabrics, cotton fabrics, acrylic fibers or cotton-polyester blends;
An annular flange is arranged at the other end of the charging connector and is clamped with the outer ball cover;
The outer end of the charging connector protrudes upwards to form an annular flange to extend to form a mounting rod;
a first weakening groove is formed between the mounting rod and the annular flange, and the first weakening groove is an annular groove;
the charging connector is provided with a second weakening groove which is an annular groove, and the second weakening groove corresponds to the curved surface of the outer surface of the inner spherical cover.
2. The double-layer ball according to claim 1, wherein the bladder is an inflatable bladder, a yarn bladder, a cloth bladder or a ball middle tire, the inflatable bladder is a rubber bladder, a PVC bladder, a TPU bladder or a latex bladder, the yarn bladder is made by winding yarns outside the inflatable bladder, the cloth bladder is made by attaching cloth outside the inflatable bladder, and the ball middle tire is made by attaching a rubber sheet on the surface of the cloth bladder or the yarn bladder.
3. The double-layered ball of claim 1, wherein the annular flange is tapered in cross-section.
4. A method of producing a bilayer ball according to any one of claims 1 to 3 comprising the steps of:
(1) Manufacturing a bladder;
(2) Punching out an inner ball leather ball sheet, and adhering the inner ball leather ball sheet to the outer surface of the bladder to form an inner ball;
(3) Punching out outer ball leather ball sheets, sewing the outer ball leather ball sheets with each other to form an outer ball leather, and arranging the inner ball in the outer ball leather during sewing to enable the outer ball leather to cover the inner ball to form a double-layer ball;
(4) An air charging nozzle is inserted.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310053274 | 2023-02-03 | ||
| CN2023100532746 | 2023-02-03 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116271746A CN116271746A (en) | 2023-06-23 |
| CN116271746B true CN116271746B (en) | 2024-05-03 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310172739.XA Active CN116271746B (en) | 2023-02-03 | 2023-02-28 | Double-layer ball and preparation method thereof |
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| Country | Link |
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| CN (1) | CN116271746B (en) |
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| CN106823308A (en) * | 2017-01-20 | 2017-06-13 | 朱彧 | Environment-friendly water-based gluing closes mechanical lagging basketball |
| CN209771242U (en) * | 2019-01-27 | 2019-12-13 | 南京哈恩达斯体育用品有限公司 | Quick aerating device of spheroid production |
| CN109999438A (en) * | 2019-04-23 | 2019-07-12 | 米建军 | A kind of inflatable hollow sphere of noise reduction |
| CN210904861U (en) * | 2019-10-18 | 2020-07-03 | 三力伟业（天津）体育用品有限公司 | Push type ball courage aerating device |
| CN214344265U (en) * | 2020-12-21 | 2021-10-08 | 无锡市爱可赛体育用品有限公司 | Antiskid ball for sports |
| CN219517735U (en) * | 2023-02-03 | 2023-08-15 | 厦门元保运动器材有限公司 | Double-layer ball |
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|---|---|
| CN116271746A (en) | 2023-06-23 |
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