Environment-friendly science and technology rubber ball and vulcanization mold thereof

Abstract

The utility model discloses an environmental protection science and technology rubber ball and vulcanization mould thereof, and the rubber basketball includes the inner bag layer, winding layer, base material layer and film layer that are wrapped in turn from inside to outside. The inner bag layer outer surface sets up the inner rubber layer to stick solid winding layer, and the winding layer outer surface sets up the outer rubber layer to stick solid base material layer, and the film layer is fixed through the base material layer outer surface adhesion, realizes the close adhesion between each functional layer while guaranteeing the stability of the ball body structure, and the overall performance of the basketball is optimized. The vulcanization mould contains the upper die, lower die of hinged, and both are equipped with heating gas inlet and outlet device and cooling water inlet and outlet device in the hollow area, and the upper gas outlet and lower gas outlet that are communicated with the hollow area are respectively arranged. The upper die and lower die cover and form the chamber containing the basketball, and the lower die is provided with the inflation air pipe that is communicated with the chamber, and the end portion is in register with the basketball air inlet. The technical scheme of the utility model can reduce the hardness of the rubber basketball and improve the hand feeling.

Description

Technical Field

[0001] This utility model relates to the field of rubber basketballs, specifically to an environmentally friendly rubber ball and its vulcanization mold. Background Technology

[0002] As a widely used team sport, the surface structure of basketballs directly affects their handling and durability. Currently, most rubber basketballs are molded in one piece using a high-temperature, high-pressure vulcanization process. However, due to limitations in vulcanization mold design, the air nozzles must be placed in the grooves to fit the equipment structure, resulting in insufficient product design flexibility. Furthermore, due to the constraints of the vulcanization system, the height of the surface particles is typically controlled within the range of 0.8-1.2mm, with a particle gap of 0.2-0.5mm. Exceeding these parameters can easily lead to molding defects such as missing material (missing the correct size), limiting the potential for improving the feel. In addition, the rubber granule layer formed by the vulcanization process generally has a high surface smoothness, which can easily lead to insufficient grip in humid environments. Utility Model Content

[0003] In view of the above problems, this utility model provides an environmentally friendly rubber ball and its vulcanization mold, which solves the problems of fixed air nozzle position, easy loss of particle size and slippery feel due to the limitations of vulcanization process in rubber basketballs.

[0004] To achieve the above objectives, in a first aspect, this application provides an environmentally friendly rubber ball, comprising an inner liner layer, a winding layer, a substrate layer, and a film layer; the winding layer is wrapped around the outer surface of the inner liner layer, and the outer surface of the inner liner layer is provided with an inner adhesive layer for bonding the winding layer; the substrate layer is wrapped around the outer surface of the winding layer, and the outer surface of the winding layer is provided with an outer adhesive layer for bonding the substrate layer; the film layer is bonded to the outer surface of the substrate layer.

[0005] The inner and outer rubber layers are used to bond and fix the inner bladder, winding layer and substrate layer layer one by one. The thermoplastic elastomer substrate layer supports the rubber layer to form a deformation-resistant composite structure. The textured rubber sheet layer improves grip friction, the elastic rubber inner bladder layer maintains stable air pressure, and the fiber winding layer enhances the overall strength, thus comprehensively optimizing the basketball's handling and durability.

[0006] In some embodiments, the film layer includes multiple films spliced ​​together, and a rib groove is provided at the splicing point of the films, with a coating layer provided at the bottom of the rib groove.

[0007] In some embodiments, the environmentally friendly rubber ball also includes an air nozzle connected to the interior of the environmentally friendly rubber ball, with the air inlet of the air nozzle flush with the outer surface of the film layer.

[0008] In some embodiments, the outer surface of the film layer is provided with bumps, the size of which is 1.5 to 2.5 mm and the gap between the bumps is 0.8 to 1.5 mm.

[0009] In some embodiments, the protrusions are provided on the film; or, the protrusions are provided on the grooves and the film.

[0010] Or the bumps may have engraved patterns.

[0011] In a second aspect, this utility model also provides a vulcanizing mold for manufacturing an environmentally friendly rubber ball according to the first aspect. The vulcanizing mold includes an upper mold and a lower mold, which are connected to each other. Both the upper mold and the lower mold have hollow areas, and heating gas inlet and outlet devices and cooling water inlet and outlet devices are provided in the hollow areas of both the upper mold and the lower mold. The lower mold has a vent hole. After the upper mold and the lower mold are closed, a cavity for accommodating the environmentally friendly rubber ball is formed. The vent hole is connected to the cavity. An inflation duct is provided through the lower mold and connects to the cavity. One end of the inflation duct is positioned opposite to the air inlet of the environmentally friendly rubber ball, and the air inlet is located on the rubber sheet.

[0012] In some embodiments, the vulcanizing mold further includes an inflation head, which includes an inflation body and a card, the card being movably sleeved on the inflation body; the outer edge of the end of the inflation duct near the chamber is provided with a groove for accommodating the card; when the film is placed, the card is placed in the groove, and the end of the inflation body is flush with the surface of the card.

[0013] Unlike existing technologies, the above technical solution provides an environmentally friendly rubber ball and its vulcanization mold. The rubber basketball comprises, from the inside out, an inner bladder layer, a winding layer, a substrate layer, and a film layer, bonded together sequentially. The thermoplastic elastomer substrate layer supports the surface film layer. The film layer is composed of multiple pieces of ribbed film spliced ​​together, with a coating layer inside the ribs and raised bumps and gaps on the outer surface. The air inlet is flush with the outer surface of the film layer. The vulcanization mold includes a connecting upper and lower mold. The hollow area is equipped with a heating gas inlet / outlet device, a cooling water inlet / outlet device, and an air outlet. The lower mold has an air duct running through it to align the air nozzle. This technical solution avoids misalignment during particle molding through a layered composite structure. The mold cooling device and air path design optimize vulcanization temperature and air nozzle positioning. The raised bump distribution improves the uniformity of touch, comprehensively solving the problems of limited air nozzle position, particle defects, and excessive hardness in traditional basketballs.

[0014] The above description of the utility model is merely an overview of the technical solution of this utility model. In order to enable those skilled in the art to better understand the technical solution of this utility model and to implement it based on the description and drawings, and to make the above-mentioned objectives and other objectives, features and advantages of this utility model easier to understand, the following description is provided in conjunction with the specific embodiments and drawings of this utility model. Attached Figure Description

[0015] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of the present invention and other related contents, and should not be considered as limitations on the present invention.

[0016] In the accompanying drawings of the instruction manual: Figure 1 This is a three-dimensional structural diagram of the rubber basketball described in a specific embodiment; Figure 2 This is a three-dimensional structural diagram of the rubber basketball described in a specific embodiment; Figure 3 This is a cross-sectional view of the rubber basketball described in the specific embodiment; Figure 4 This is a schematic diagram of the structure of the rubber basketball and vulcanizing mold described in the specific embodiment; Figure 5 This is a schematic diagram of the structure of the inflation head described in a specific embodiment.

[0017] The reference numerals used in the above figures are explained as follows: 1. Inner liner; 2. Wrapping layer; 3. Substrate layer; 4. Film layer; 41. Film; 42. Sinew groove; 43. Protrusions; 5. Upper mold; 6. Lower mold; 61. Inflatable air duct; 7. Hollow area; 8. Inflation head; 81. Inflatable body; 82. Cards. Detailed Implementation

[0018] To illustrate in detail the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this utility model, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this utility model and are therefore intended to limit the scope of protection of this utility model.

[0019] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this utility model. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this utility model, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0020] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit the invention.

[0021] In the description of this utility model, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " generally indicates that the preceding and following objects have an "or" logical relationship.

[0022] In this invention, terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy, or order between these entities or operations.

[0023] Without further limitations, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this invention is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a series of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0024] Similar to the understanding in the Examination Guidelines, in this utility model, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments of this utility model, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0025] In the description of the embodiments of this utility model, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the convenience of describing the specific embodiments of this utility model or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0026] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this utility model, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this utility model pertains, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.

[0027] Please see Figures 1 to 3 In a first aspect, this embodiment provides an environmentally friendly rubber ball, including an inner liner layer 1, a winding layer 2, a substrate layer 3, and a film layer 4; the winding layer 2 is wrapped around the outer surface of the inner liner layer 1, and the outer surface of the inner liner layer 1 is provided with an inner adhesive layer for bonding the winding layer 2; the substrate layer 3 is wrapped around the outer surface of the winding layer 2, and the outer surface of the winding layer 2 is provided with an outer adhesive layer for bonding the substrate layer 3; the film layer 4 is bonded to the outer surface of the substrate layer 3.

[0028] In this embodiment, the inner bladder layer 1 is the core air-filled structure of the basketball, preferably made of elastic rubber to form a sealed cavity, which is used to maintain the shape of the ball and the stability of air pressure; the winding layer 2 is made of fiber material wrapped around the outer surface of the inner bladder layer 1 in a spiral or mesh manner, and is bonded and fixed to the inner bladder layer 1 by an inner adhesive layer (such as synthetic rubber glue), which is used to enhance the structural resistance to deformation; the substrate layer 3 is a thermoplastic elastomer layer, which is bonded to the winding layer 2 by an outer adhesive layer, and is used to provide a supporting base for the surface leather; the film layer 4 is a surface-textured rubber sheet, which is bonded to the outer surface of the substrate layer 3 by hot pressing or adhesive, which is used to improve the grip friction and wear resistance of the basketball.

[0029] In this embodiment, the inner rubber layer and the outer rubber layer are used to bond and fix the inner bladder layer 1, the winding layer 2 and the substrate layer 3 layer by layer. With the support of the thermoplastic elastomer substrate layer 3 for the film layer 4, a deformation-resistant composite structure is formed. The surface textured rubber film layer 4 improves the grip friction, the elastic rubber inner bladder layer 1 maintains stable air pressure, and the fiber winding layer 2 enhances the overall strength, thus comprehensively optimizing the basketball's controllability and durability.

[0030] In some embodiments, the film layer 4 includes multiple films 41, which are spliced ​​together, and a groove 42 is provided at the splicing point of the films 41, with a coating layer at the bottom of the groove 42.

[0031] In this embodiment, the film 41 can be spliced ​​by hot pressing or adhesive to form the film layer 4, which is used to improve grip friction; the splicing point is the joint area of ​​the edge of the film 41, and the groove 42 is a groove structure on the inner side of the splicing point, which is used to accommodate the coating layer and hide the seam; the coating layer is applied to the bottom of the groove 42, and is made of wear-resistant elastic material, which is used to cover the joint marks and prevent cracking.

[0032] This embodiment uses the design of splicing film 41 with coating layer inside the groove 42 to maintain the texture friction performance of film layer 4 while eliminating the defect of exposed seams and improving the appearance consistency. The coating layer fills and reinforces the structure of groove 42, reduces the risk of cracking at the splice and enhances the durability of basketball.

[0033] In some embodiments, the environmentally friendly rubber ball also includes an air nozzle connected to the interior of the environmentally friendly rubber ball, with the air inlet of the air nozzle flush with the outer surface of the film layer 4.

[0034] In this embodiment, the air nozzle refers to the air-inflating component that penetrates the inner and outer cavities of the environmentally friendly rubber ball. It is preferably made of metal or hard plastic and is used to inflate the ball. The position of the air nozzle is not limited to the middle of the groove 42 and the middle of the film 41 of the environmentally friendly rubber ball. The air inlet is the exposed end of the air nozzle, and its opening plane is flush with the outer surface of the film layer 4, which can eliminate the tactile difference and appearance interference caused by the protrusion of the traditional air nozzle.

[0035] This embodiment optimizes the overall appearance and tactile uniformity by aligning the air inlet with the outer surface of the film layer 4, while ensuring airtightness and ease of inflation.

[0036] In some embodiments, the outer surface of the film layer 4 is provided with protrusions 43, the size of the protrusions 43 is 1.5 to 2.5 mm, and the gap between the protrusions 43 is 0.8 to 1.5 mm.

[0037] In this embodiment, the bumps 43 refer to the regular raised structures integrally formed on the outer surface of the film layer 4, preferably made of soft rubber, to enhance grip friction; the gaps are the intervals between adjacent bumps 43, which, through uniform distribution, avoid the hardening of the touch caused by excessively dense bumps, while maintaining the touch sensitivity of the surface texture. The bumped surface on the film layer can be smooth, or the bumped surface on the film layer can be engraved with patterns, such as any one of the following: mesh, hexagonal pattern, wave pattern, lightning pattern, or dart pattern.

[0038] This embodiment improves the grip and ball control stability of the basketball surface by using soft protrusions 43 and reasonable gaps. It has a soft touch and balanced wear resistance, which is suitable for professional sports needs and avoids defects such as easy slipping or hard touch.

[0039] In some embodiments, the protrusions 43 are disposed on the film 41; or, the protrusions 43 are disposed on the grooves 42 and the film 41.

[0040] In this embodiment, the protrusions 43 are disposed on the film 41 or simultaneously distributed on the grooves 42 and the film 41. The synergistic effect of the groove structure of the grooves 42 on the covering and positioning of the protrusions 43 and the surface texture of the film 41 enhances the tactile consistency between the splicing area and the planar area, and avoids the fluctuation of friction performance caused by the positional difference of the protrusions 43. The placement of the protrusions 43 in the grooves 42 also strengthens the grip at the splicing point, compensates for the weakening of surface friction caused by the recess of the grooves 42, and improves the overall stability of basketball handling and the uniformity of touch, and extends the service life of the surface texture.

[0041] Please see Figure 4 In a second aspect, this embodiment also provides a vulcanizing mold for manufacturing an environmentally friendly rubber ball according to the first aspect. The vulcanizing mold includes an upper mold 5 and a lower mold 6, which are connected to each other. Both the upper mold 5 and the lower mold 6 are hollow. A heating gas inlet / outlet device and a cooling water inlet / outlet device are provided in the hollow area 7 of both the upper mold 5 and the lower mold 6. The upper mold 5 has an upper air outlet that is connected to the hollow area 7 of the upper mold 5. The lower mold 6 has a lower air outlet that is connected to the hollow area 7 of the lower mold 6. After the upper mold 5 and the lower mold 6 are closed, a cavity for accommodating the environmentally friendly rubber ball is formed. An inflation duct 61 is provided through the lower mold 6 and connects to the cavity. One end of the inflation duct 61 is positioned opposite to the air inlet of the environmentally friendly rubber ball, and the air inlet is located on the rubber sheet 41.

[0042] In this embodiment, the vulcanizing mold is a hot pressing device for molding environmentally friendly rubber balls. The upper mold 5 and the lower mold 6 are preferably steel shells, and the hollow area 7 refers to the sealed cavity inside the mold body. Preferably, the cooling device is a circulation pipe set in the hollow area 7, which is used to introduce steam or cooling water to regulate the vulcanization temperature. The upper and lower air outlets are through holes on the surface of the mold body, which are respectively connected to the hollow area 7 and the outside, and are used to discharge gas to maintain the vulcanization gas pressure balance. The chamber is a spherical space formed by the upper mold 5 and the lower mold 6 after they are closed, which is used to accommodate the semi-finished basketball to be vulcanized. The air inlet duct 61 is a metal pipe that passes through the lower mold 6, and its end is aligned with the air inlet of the environmentally friendly rubber ball, which is used to inflate the ball during the vulcanization process and fix the position of the air nozzle. The air inlet is the air inlet of the inner bladder layer 1 of the basketball, located on the rubber sheet 41 of the rubber sheet layer 4.

[0043] This embodiment achieves precise control of vulcanization temperature by using a steel vulcanization mold in conjunction with a cooling device in the hollow zone 7, reducing hardening and surface smoothness defects of the rubber layer caused by high temperature; the upper and lower air outlets work together to balance the vulcanization gas pressure, avoiding poor interlayer adhesion, and comprehensively improving the molding quality and performance consistency of the basketball.

[0044] Please see Figure 5 In some embodiments, the vulcanizing mold further includes an inflation head 8, which includes an inflation body 81 and a card 82, the card 82 being movably fitted onto the inflation body 81; the outer edge of the end of the inflation duct 61 near the chamber is provided with a groove for accommodating the card 82; when the film 41 is placed, the card 82 is placed in the groove, and the end of the inflation body 81 is flush with the surface of the card 82.

[0045] In this embodiment, the inflation head 8 refers to the inflation component that cooperates with the inflation duct 61 in the vulcanizing mold. The inflation body 81 is preferably a metal tubular structure used to conduct inflation airflow. The card 82 is preferably an annular elastic element that is movably sleeved on the outer wall of the inflation body 81 and used to abut against the edge of the film 41. The groove is an annular groove on the outer edge of the end of the inflation duct 61 and is used to limit the card 82. The end of the inflation body 81 and the surface of the card 82 are flush, meaning that they are on the same plane to avoid the film 41 from being deformed by pressure.

[0046] In this embodiment, the coordinated structure of the inflatable body 81, the card 82, and the groove ensures that the film 41 is subjected to uniform force during inflation. The card 82 limits the movement of the inflatable body 81 to prevent it from shifting. The flush end design prevents the film 41 from being partially dented or damaged, ensuring the positioning accuracy of the air nozzle and the sealing of the film layer 4, and reducing air leakage or deformation defects after vulcanization.

[0047] Furthermore, the following examples can be derived from the above technical solutions: The manufacturing process of a rubber basketball includes the following steps: 1: Manufacturing process of wear-resistant low-temperature rubber compound 1) 60-100 parts of rubber materials: natural rubber, synthetic rubber SBR, or butadiene rubber or nitrile rubber are formulated in the following proportions.

[0048] 2) 30-60 parts of filler materials: calcium carbonate, fumed silica, zinc oxide, stearic acid in proportion, cellulose (including lignocellulose, leather cellulose, or recycled cellulose).

[0049] 3) 10-30 parts: Additives: tackifying resin, protective wax, rubber flow degassing agent, antioxidant, anti-aging agent, accelerator, ointment, closed-cell foaming agent azodicarbonamide AC or dibenzenesulfonyl hydrazine ether (OBSH) or chemical foaming agent carbon dioxide CO2, sulfur and a certain amount of color glue.

[0050] For example: 70 parts natural rubber, 10 parts styrene-butadiene rubber, 10 parts synthetic rubber (SBR), 20 parts calcium carbonate, 5 parts silica, 10 parts zinc oxide, 5 parts stearic acid, 20 parts cellulose, 5 parts tackifying resin, 2 parts protective wax, 2 parts flow venting agent (PW), 3 parts naphthenic oil, 1 part antioxidant, 2 parts anti-aging agent, 2 parts accelerator (BZ), 1 part accelerator (PZ), 3 parts foaming agent (AC), 2 parts sulfur, and a certain amount of color rubber.

[0051] The above-mentioned rubber materials and filler materials are mixed in an internal mixer and then cut into rubber sheets. Next, add the additives to the film and start the mixing process. Turn the mixture evenly from side to side for 5-10 minutes. The mixing mill has a temperature control: 50-80℃ to avoid scorching due to excessive temperature, and poor softness of the rubber compound due to excessively low temperature, which will affect the quality of the finished product.

[0052] After the rubber compound has been processed and rolled, it is calendered into rubber sheets. The finished rubber sheets must be immediately sent to an air-conditioned room below 25°C to cool and wait for use. The rubber sheets are left to cool and stand for 4 hours before use.

[0053] 2: Making an inflatable gauze liner or a cloth liner Option 1: Fabrication of the gauze pad The pneumatic tire is sized to the required diameter, and then a certain length of yarn is wound around the pneumatic tire. The yarn materials include: cotton yarn, polyester yarn, nylon yarn, staple polyester yarn, long-fiber polyester yarn, nylon N6 yarn, and nylon N66 yarn.

[0054] Option 2: Gauze padding preparation The pneumatic tire is sized to the required diameter, and then a certain length of yarn is wound around the pneumatic tire. The yarn materials include: cotton yarn, polyester yarn, nylon yarn, short-fiber polyester yarn, long-fiber polyester yarn, nylon N6 yarn, and nylon N66 yarn. Then, a layer of leather-like substrate (non-woven fabric, dustproof cloth, polyester cloth, or fleece) is wrapped around the yarn core.

[0055] 3: Rubber ball molding Cut the film made in step one into the required pieces, attach them to the forming mold with the corresponding piece shape and air suction holes, then put in the yarn or gauze pad, and use the automatic bonding of the forming machine to form an unvulcanized sphere.

[0056] Molding mold features: The air nozzle is designed in the groove or middle of the sheet.

[0057] 4: Uncured rubber balls are vulcanized using a vulcanizing machine to obtain vulcanized rubber basketballs.

[0058] 1) Vulcanizing mold design: A: Valve design: Option 1: The air nozzle is in the middle of the sheet, the upper and lower molds of the sheet are evenly divided, the inflation position is in the middle of the sheet, the inflation tube is inserted at an angle, and there needs to be a gap between the inner mold and the outer mold to facilitate the circulation of steam and cooling water. Therefore, in order to prevent steam and cooling water leakage, the inner mold and the outer mold are made into one piece, and a channel is made where the inflation air tube is inserted. The vulcanization mold needs to be made of steel material.

[0059] Option 2: The air nozzle is located in the middle of the groove, the upper and lower molds are evenly centered, the air inlet is located at the mold closing position, and the conventional aluminum inner mold design is easy to manufacture.

[0060] B: Anti-slip and dustproof particle design Particle size 1.5-2.5MM, shape: the surface of the particles is flat and round, and the arrangement is random and irregular. The gap between particles is 0.8-1.5MM. Larger particle designs are available. Patterns such as net patterns, hexagonal patterns, wave patterns, lightning patterns, dart patterns, etc. can also be engraved on the surface of the particles.

[0061] C: Rib Groove Design The groove design incorporates the curvature of the thinned leather section of the leather used to glue the basketball. Smooth gluten grooves or granular gluten grooves.

[0062] 5: Low-temperature and low-pressure vulcanization Unvulcanized spheres are placed on a vulcanizing machine equipped with a vulcanizing mold for vulcanization. Its vulcanizing air pressure: 6-9 kgf / cm2 (0.6-0.9 MPa), low temperature: 140-150℃ Standard rubber basketball: Pressure: 9.5-12 kgf / cm² (0.6-0.9 MPa), Low temperature: 160-180℃ The rubber basketballs manufactured using the above technical solutions have the following functions: 1. Low-temperature and low-pressure vulcanization preserves the flexibility, stability, and color properties of the rubber ball, especially in terms of fluorescent rubber color, low-temperature vulcanized rubber has a more vibrant color.

[0063] 2. The hardness of the ball produced by low-temperature vulcanization is softer than that of the ball produced by high-temperature vulcanization, with a hardness reduction of 10-20 degrees. The hardness of this patented product is 40-60 degrees, while the hardness of a regular basketball is 70-80 (Shore C hardness tester).

[0064] 3. Comparison of resilience of spheres with the same structure: When dropped from a height of 1800MM, the low-temperature vulcanized sphere rebounds to a height of 1300-1400MM, while the high-temperature vulcanized sphere rebounds to a height of 1200-1300MM. The low-temperature vulcanized sphere has better resilience.

[0065] 4. Under low-temperature vulcanization conditions, the rubber becomes more fluid, thereby promoting better flow and penetration of the rubber material into the fabric layer at the bottom of the leather, making the rubber and leather bond firmly.

[0066] 5. When particles hit the ground, the contact area is small.

[0067] By adopting the above technical solutions, this utility model differs from the prior art and has the following beneficial effects: This utility model provides an environmentally friendly rubber ball and its vulcanization mold. The rubber basketball includes, from the inside out, an inner bladder layer, a winding layer, a substrate layer, and a film layer, which are sequentially composited. The inner and outer rubber layers are bonded together, and the thermoplastic elastomer substrate layer supports the surface film layer. The film layer is composed of multiple pieces of ribbed film spliced ​​together, with a coating layer inside the ribs and raised bumps and gaps on the outer surface. The air inlet is flush with the outer surface of the film layer. The vulcanization mold includes a hinged upper and lower mold, a cooling device and an air outlet in the hollow area, and an air inlet through which the air inlet is aligned with the lower mold via an inflation duct. The above technical solution avoids misalignment during particle molding through a layered composite structure, optimizes vulcanization temperature and air inlet positioning through the mold cooling device and air path design, and improves the uniformity of touch by increasing the distribution of raised bumps. It comprehensively solves the problems of limited air inlet position, particle defects, and excessive hardness in traditional basketballs.

[0068] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this utility model, this does not limit the scope of patent protection for this utility model. Any technical solutions resulting from equivalent structural or procedural substitutions or modifications made based on the essential concept of this utility model and utilizing the content described in the text and drawings of this utility model, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection for this utility model. The eight-piece sheet diagram shown in the embodiments is merely illustrative; the patent may cover other sheet shapes that can be assembled into a basketball.

Claims

1. An environmentally friendly rubber ball, characterized in that, It includes an inner liner layer, a winding layer, a substrate layer, and a film layer; the winding layer wraps around the outer surface of the inner liner layer, and the outer surface of the inner liner layer is provided with an inner adhesive layer for bonding the winding layer; the substrate layer wraps around the outer surface of the winding layer, and the outer surface of the winding layer is provided with an outer adhesive layer for bonding the substrate layer; the film layer is bonded to the outer surface of the substrate layer.

2. The environmentally friendly rubber ball according to claim 1, characterized in that, The film layer comprises multiple films, which are spliced ​​together, and a rib groove is provided at the splicing point of the films, with a coating layer provided at the bottom of the rib groove.

3. The environmentally friendly rubber ball according to claim 2, characterized in that, The environmentally friendly rubber ball also includes an air nozzle, which is connected to the interior of the environmentally friendly rubber ball, and the air inlet of the air nozzle is flush with the outer surface of the film layer.

4. The environmentally friendly rubber ball according to claim 2, characterized in that, The outer surface of the film layer is provided with protrusions, the size of which is 1.5 to 2.5 mm and the gap between the protrusions is 0.8 to 1.5 mm.

5. The environmentally friendly rubber ball according to claim 4, characterized in that, The bumps on the film layer are either smooth or have textured surfaces.

6. The environmentally friendly rubber ball according to claim 4, characterized in that, The protrusions are disposed on the film; or, the protrusions are disposed on the grooves and the film.

7. A vulcanizing mold, characterized in that, The vulcanizing mold is used to manufacture an environmentally friendly rubber ball as described in any one of claims 1 to 6; The vulcanizing mold includes an upper mold and a lower mold, which are connected to each other. Both the upper mold and the lower mold have hollow areas, and heating gas inlet and outlet devices and cooling water inlet and outlet devices are provided in the hollow areas of the upper mold and the lower mold. The lower mold is provided with a vent hole. After the upper mold and the lower mold are closed, a cavity for accommodating the environmentally friendly rubber ball is formed. The vent hole is connected to the cavity. The lower mold is provided with an inflation duct that is connected to the cavity. One end of the inflation duct is positioned opposite to the air inlet of the environmentally friendly rubber ball. The air inlet is located on the rubber sheet.

8. The vulcanizing mold according to claim 7, characterized in that, Also includes: Inflation head; The inflation head includes an inflation body and a card, the card being movably sleeved on the inflation body; the outer edge of the end of the inflation duct near the chamber is provided with a groove for accommodating the card; When the film is placed, the card is placed in the groove, and the end of the inflatable body is flush with the surface of the card.

Images