Manufacturing method of hot-laminated handball

Abstract

The invention discloses a method for manufacturing a hot-laminated handball in the field of handball manufacturing, which comprises the following steps: S101, manufacturing an inner container: mixing natural rubber and butyl rubber, sequentially carrying out plastication and mixing treatment to prepare a uniform rubber sheet, and putting the rubber sheet into an inner container processing mold to manufacture the inner container; and S102, manufacturing a filling layer: after fully and uniformly mixing polypropylene foaming microspheres and a binder, injecting the mixture into a space between the inner container and the reinforcing layer to form a stable whole, so that the weight and the perimeter of the filling layer reach the international standard weight and the international standard perimeter. The high-strength ball skin material is selected, the reinforcing layer is additionally arranged, and professional surface wear-resistant treatment is carried out, so that the gram weight and circumference of the manufactured handball are greatly improved; the reasonable structural design is matched with high-quality raw materials, the handball can be better controlled, the damage risk of internal components is greatly reduced, meanwhile, the service life of the inner container is guaranteed through good air tightness and chemical stability, and therefore the service life of the whole handball is remarkably prolonged.

Description

Technical Field

[0001] The present invention relates to the field of handball production, specifically a method for manufacturing a heat-bonded handball. Background Art

[0002] Due to its intense competitive confrontation and unique viewing pleasure, handball is widely popular worldwide, and the number of participants is increasing day by day. During intense matches and high-intensity daily training, handballs are frequently subjected to strong impacts, continuous friction, and various complex and changeable usage environments. However, the current manufacturing methods of handballs, such as machine sewing and hand sewing, have a series of problems that need to be solved urgently, resulting in difficulties in meeting the actual requirements in terms of circumference, gram weight, and service life.

[0003] The toughness of the leather material of existing handballs is insufficient, and it is extremely easy to wear and break under frequent hitting and friction; the internal structure design lacks rationality and cannot effectively disperse the impact force, resulting in premature damage to the internal components of the ball; the manufacturing process is not delicate enough, causing the overall quality of the handball to be unstable, which in turn has a negative impact on the performance of the handball, such as its flight trajectory, elastic feedback, and the athlete's grip feeling. These problems not only increase the cost for athletes and users to replace handballs, but also hinder the popularization and development of handball to a certain extent. Moreover, the leather material of the ball is too hard or too slippery, resulting in insufficient friction and tactile feedback for athletes when holding and passing the ball, affecting the accuracy of ball control.

[0004] Therefore, those skilled in the art have provided a method for manufacturing a heat-bonded handball to solve the problems raised in the above background art. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for manufacturing a heat-bonded handball to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: A method for manufacturing a heat-bonded handball includes the following steps: S101. Inner bladder production: After mixing natural rubber and butyl rubber, it is successively subjected to plasticating and mixing treatments to form a uniform film, and the film is placed into an inner bladder processing mold to make an inner bladder; S102. Filling layer production: After thoroughly mixing polypropylene foamed microspheres and a binder evenly, it is injected into the space between the inner bladder and the reinforcing layer to form a stable whole; S103. Reinforcing layer production: Using a weaving process, carbon fiber filaments or glass fiber filaments are woven into a regular mesh structure. Then, the woven fiber mesh is tightly sleeved outside the inner bladder and the filling layer, and a high-strength binder is used to firmly bond it to the filling layer to enhance the overall strength of the handball; S104. Making the ball skin: Cut the composite fabric of aramid fiber and polyurethane according to the shape and size of the handball, and tightly wrap it around the outside of the reinforcement layer through hot pressing and stitching processes. During stitching, use high-strength nylon or polyester threads and perform multi-layer reinforcement on the stitched parts to significantly improve the overall strength and wear resistance of the ball skin. S105. Surface treatment: Spray a wear-resistant coating composed of nano-scale ceramic particles and organic resin on the surface of the handball. This coating has excellent wear resistance and corrosion resistance, can further enhance the surface hardness of the handball, and effectively extend the service life of the handball.

[0007] As a further solution of the present invention: It also includes constructing a hexagonal grid structure of honeycombs between the inner bladder and the filling layer. This structure can not only provide good support but also effectively reduce the weight; between the ball skin and the reinforcement layer, adopt an overlapping arrangement structure of fish scales to increase the flexibility and touch of the ball skin, make the handball fit the hand more closely when being held, and improve the hand feeling.

[0008] As a further solution of the present invention: In the composite fabric of aramid fiber and polyurethane in step S104, the content of aramid fiber is 50%-80%.

[0009] As a further solution of the present invention: In the blend of natural rubber and butyl rubber in step S101, the content of natural rubber is 60%-90%.

[0010] As a further solution of the present invention: The average particle size of the polypropylene microspheres in step S102 is 10-100 μm.

[0011] As a further solution of the present invention: The weaving density of the carbon fiber woven mesh or glass fiber woven mesh in step S103 is 80-150 fibers per square centimeter.

[0012] As a further solution of the present invention: In step S101, the inner bladder is made by a hot pressing forming process, the forming temperature is 140-180 °C, and the pressure is 8-15 MPa.

[0013] As a further solution of the present invention: In step S102, the filling layer is made by mixing the filling material and the binder evenly and injecting them into the space between the inner bladder and the reinforcement layer, and making them evenly distributed through vibration and rotation.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. By selecting high-strength ball skin materials, adding a reinforcement layer, and performing professional surface wear-resistant treatment, the handball made by the present invention has been greatly improved in terms of wear resistance.

[0015] 2. In the present invention, the reasonable structural design is combined with high-quality raw materials, enabling the handball to better withstand impact force, significantly reducing the risk of damage to internal components. At the same time, good airtightness and chemical stability ensure the service life of the inner bladder, thereby significantly extending the service life of the entire handball.

[0016] 3. The present invention adopts an overlapping arrangement structure similar to fish scales, increasing the flexibility and touch of the ball skin, making the handball fit more closely to the hand when being held, and enhancing the hand feeling. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the preparation flow chart of the present invention; DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] Please refer to Figure 1 , in the embodiments of the present invention, the manufacturing method of the thermally bonded handball includes the following steps; S101. Inner bladder production: After mixing natural rubber and butyl rubber, it is successively subjected to plasticizing and mixing treatments to form a uniform film, and the film is put into an inner bladder processing mold to make the inner bladder; S102. Filling layer production: After fully mixing polypropylene foamed microspheres and a binder evenly, it is injected into the space between the inner bladder and the reinforcing layer to form a stable whole; S103. Reinforcing layer production: Using a weaving process, carbon fiber filaments or glass fiber filaments are woven into a regular mesh structure. Then, the woven fiber mesh is tightly sleeved outside the inner bladder and the filling layer, and a high-strength binder is used to firmly bond it to the filling layer to enhance the overall strength of the handball; S104. Ball skin production: The composite fabric of aramid fiber and polyurethane is cut according to the shape and size of the handball, and it is tightly wrapped outside the reinforcing layer through hot pressing and sewing processes. During the sewing process, high-strength nylon threads or polyester threads are selected, and multiple layers of reinforcement treatment are performed on the sewing parts to significantly improve the overall strength and wear resistance of the ball skin; S105. Surface treatment: A wear-resistant coating composed of a mixture of nanoscale ceramic particles and organic resin is sprayed on the surface of the handball. This coating has excellent wear resistance and corrosion resistance, can further improve the surface hardness of the handball, and effectively extend the service life of the handball.

[0020] Among them, it also includes constructing a hexagonal grid structure of a honeycomb between the inner liner and the filling layer. This structure can not only provide good support but also effectively reduce the weight. Between the spherical skin and the reinforcing layer, an overlapping arrangement structure of fish scales is adopted to increase the flexibility and touch of the spherical skin, making the handball fit more closely to the hand when being held and improving the hand feeling.

[0021] As a further solution of the present invention: in the composite fabric of aramid fiber and polyurethane in the step S104, the content of aramid fiber is 50%-80%.

[0022] As a further solution of the present invention: in the blend of natural rubber and butyl rubber in the step S101, the content of natural rubber is 60%-90%.

[0023] As a further solution of the present invention: the average particle size of the polypropylene foamed microspheres in the step S102 is 10-100 μm.

[0024] As a further solution of the present invention: the weaving density of the carbon fiber woven mesh or the glass fiber woven mesh in the step S103 is 80-150 fibers per square centimeter.

[0025] As a further solution of the present invention: in the step S101, the inner liner is made by a hot pressing process, the forming temperature is 140-180 °C, and the pressure is 8-15 MPa.

[0026] As a further solution of the present invention: in the step S102, the filling layer is made by mixing the filling material and the binder evenly and injecting them into the space between the inner liner and the reinforcing layer, and making them evenly distributed by vibration and rotation. Embodiment

[0027] Raw material preparation: Spherical skin material: Select a composite fabric with an aramid fiber content of 60% and a polyurethane content of 40%, and the fabric thickness is accurately controlled to be 1.5 mm.

[0028] Inner liner material: Mix natural rubber and butyl rubber in a ratio of 7:3 to make a blend with excellent performance.

[0029] Filling material: Select polypropylene foamed microspheres with an average particle size of 50 μm to ensure their buffering performance and the effect of dispersing impact force.

[0030] Reinforcing layer material: Adopt a carbon fiber woven mesh with a weaving density of 100 fibers per square centimeter to enhance the overall strength of the handball.

[0031] Manufacturing steps: Inner bladder manufacturing: Place the blend film of natural rubber and butyl rubber into a special mold. Under the conditions of a temperature of 150°C and a pressure of 10 MPa, through a hot pressing and forming process, an inner bladder with a diameter of 200 mm is made.

[0032] Filling layer manufacturing: Thoroughly mix polypropylene foamed microspheres and a binder in a ratio of 9:1, and then inject them into the space between the inner bladder and the reinforcing layer. Through precisely controlled vibration and rotation operations, the filling material is evenly distributed and cured at room temperature for 24 hours to ensure that the filling layer is tightly bonded to the inner bladder and the reinforcing layer.

[0033] Reinforcing layer manufacturing: Tightly sleeve a carbon fiber woven mesh outside the inner bladder and the filling layer, and use a special binder to firmly bond it to the filling layer to enhance the overall strength of the handball.

[0034] Ball skin manufacturing: Cut a composite fabric of aramid fiber and polyurethane into a suitable shape, and wrap it outside the reinforcing layer through hot pressing and sewing processes. During the sewing process, use high-strength nylon sewing threads and perform double-layer reinforcement treatment on the sewing parts to improve the overall strength and wear resistance of the ball skin.

[0035] Surface treatment: Spray a wear-resistant coating with a thickness of 0.1 mm on the surface of the handball. This coating is composed of nanoscale alumina ceramic particles and silicone resin, further enhancing the surface hardness and wear resistance of the handball. Embodiment

[0036] Raw material preparation: Ball skin material: Select a composite fabric with an aramid fiber content of 70% and a polyurethane content of 30%, with a thickness of 1.8 mm.

[0037] Inner bladder material: Mix natural rubber and butyl rubber in a ratio of 8:2 to make a blend.

[0038] Filling material: Select polypropylene foamed microspheres with an average particle size of 30 μm.

[0039] Reinforcing layer material: Adopt a high-strength fiberglass woven mesh with a weaving density of 120 fibers per square centimeter.

[0040] 2. Manufacturing steps: Inner bladder manufacturing: Place the blend film of natural rubber and butyl rubber into a mold, and perform hot pressing and forming under the conditions of a temperature of 160°C and a pressure of 12 MPa to make an inner bladder with a diameter of 210 mm.

[0041] Manufacture of the filling layer: Mix the polypropylene foamed microspheres and the binder evenly at a ratio of 8.5:1.5, and then inject them into the space between the inner liner and the reinforcement layer. By means of vibration and rotation, the filling material is evenly distributed and cured at a temperature of 60°C for 12 hours.

[0042] Manufacture of the reinforcement layer: Wrap the glass fiber woven mesh around the outside of the inner liner and the filling layer, and use a high-strength epoxy resin binder to firmly bond it to the filling layer.

[0043] Manufacture of the ball skin: Cut the composite fabric of aramid fiber and polyurethane into a suitable shape, and wrap it around the outside of the reinforcement layer by means of hot pressing and sewing. During the sewing process, use high-strength polyester sewing threads and perform a three-layer reinforcement treatment on the sewing part.

[0044] Surface treatment: Spray a wear-resistant coating with a thickness of 0.15 mm on the surface of the handball. This coating is composed of a mixture of nanoscale silicon carbide ceramic particles and fluorocarbon resin.

[0045] For Example 1 and Example 2, through actual tests, after thousands of impacts and frictions, the wear degree of the ball skin is much lower than that of traditional handballs, which can effectively extend the service life of the handball, and has better impact resistance and just the right feel.

[0046] Compared with the existing traditional handball manufacturing process, by selecting high-strength ball skin materials, adding a reinforcement layer, and performing professional surface wear-resistant treatment, the handball manufactured by the present invention has been greatly improved in terms of wear resistance; moreover, the reasonable structural design and high-quality raw materials enable the handball to better withstand impacts, greatly reducing the risk of damage to internal components. At the same time, good airtightness and chemical stability ensure the service life of the inner liner, thereby significantly extending the service life of the entire handball.

[0047] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A method for making a heat-bonded handball, characterized in that: The steps include: S101, liner production: natural rubber and butyl rubber are mixed, and then plasticized and mixed to form a uniform film, and the film is placed in a liner processing mold to form the liner; S102, filling layer preparation: after fully mixing the polypropylene foam microspheres and the binder, inject them into the space between the inner liner and the reinforcement layer to form a stable whole; S103, reinforcement layer production: using a weaving process, weaving carbon fiber filaments or glass fiber filaments into a regular mesh structure, then tightly covering the woven fiber mesh on the outside of the liner and the filling layer, and using a high-strength adhesive to firmly bond it to the filling layer; S104, ball skin production: the composite fabric of aramid fiber and polyurethane is cut according to the shape and size of the handball, and is tightly wrapped on the outside of the reinforcement layer through heat pressing and sewing process, and high-strength nylon suture or polyester suture is used to perform multi-layer reinforcement treatment on the suture; S105, Surface treatment: Spray a layer of wear-resistant coating made of a mixture of nano-ceramic particles and organic resin on the surface of the handball.

2. The method for making a heat-bonded handball according to claim 1, characterized in that: It also includes a honeycomb hexagonal grid structure built between the inner liner and the filling layer, which not only provides good support but also effectively reduces weight; between the ball skin and the reinforcement layer, an overlapping arrangement structure of fish scales is used to increase the flexibility and touch of the ball skin, making the handball fit better to the hand when held, improving the feel.

3. The method for making a heat-bonded handball according to claim 1, characterized in that: In the step S104, the content of aramid fiber in the composite fabric of aramid fiber and polyurethane is 50%-80%.

4. The method for making a heat-bonded handball according to claim 1, characterized in that: The content of natural rubber in the blend of natural rubber and butyl rubber in step S101 is 60%-90%.

5. The method for making a heat-bonded handball according to claim 1, characterized in that: The average particle size of the polypropylene foamed microspheres in step S102 is 10-100 μm.

6. The method for making a heat-bonded handball according to claim 1, characterized in that: In the step S103, the weaving density of the carbon fiber woven mesh or the glass fiber woven mesh is 80-150 fibers per square centimeter.

7. The method for making a heat-bonded handball according to claim 1, characterized in that: The inner liner in step S101 is manufactured by a hot pressing process, with a molding temperature of 140-180° C. and a pressure of 8-15 MPa.

8. The method for making a heat-bonded handball according to claim 1, characterized in that: In step S102, the filling layer is made by mixing the filling material and the adhesive evenly and injecting the mixture into the space between the inner liner and the reinforcing layer, and then vibrating and rotating the mixture to make it evenly distributed.

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