Rubber product one-step injection, hollowing and vulcanization forming production method

Abstract

The invention discloses a rubber product one-step injection, hollowing and vulcanization forming production method, which belongs to the technical field of rubber product processes. By adopting the rubber product one-step injection, hollow and vulcanization forming production method, the injection, hollowing and vulcanization procedures can be completed in a same mold cavity, the mold cavity comprises an upper half mold, a lower half mold and a mold core, the mold core sets a foundation for the hollowing of the mold cavity, after the hollowing, the condition for introducing the high-temperature high-pressure gas for the vulcanization can be satisfied, the injection molding, hollowing and vulcanization apparatus can be integrated, the heat loss caused by the procedure circulation and the procedure circulation cost in the prior art can be avoided, and the traditional defects of the traditional rubber product production process such as re-pressurizing, heating, energy consumption, time consumption and high cost can be solved.

Description

technical field [0001] The invention belongs to the technical field of rubber products, and in particular relates to a production method of one-time injection, hollowing and vulcanization molding of rubber products. Background technique [0002] Prior art In the air-free tire products mainly based on shared bicycles, there are generally at least two systems for tire materials, one is based on SBS (styrene-based thermoplastic elastomer) and SEBS (polystyrene as the end segment) , the ethylene-butene copolymer obtained by hydrogenation of polybutadiene as the linear three-block copolymer of the middle elastic block) is a physical and chemical "crystallization" system of plastics (Mobike, such as figure 1 As shown in the tire, the pores are vertical holes); a chemical reaction "cross-linking" system (Hello bike, such as figure 2 The cross-section of the tire shown, the hole is a horizontal annular hole), both systems can be injection molded by the melt injection process. [...

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Problems solved by technology

[0004] The SBS and SEBS materials of the first system are expensive, easy to soften at high temperature and have poor wear resistance;

[0005] In the second system, the molding of the tire is to inject a long semi-finished product in the mold first, the pores can only be straight holes, and then cut according to the corresponding specifications, and then transfer to the vulcanization mold for vulcanization. The molding and vulcanization should be carried out separately. , although the material cost is relatively low, but the process cost is high. Moreover, during the vulcanization process, due to the pores inside, it is difficult to ensure the uniform vulcanization of the entire semi-finished product during the vulcanization process, and the dynamic balance effect of the finished product is poor. After vulcanization, the high-pressure gas in the pores is in the It is also easy to expand rapidly and explode when the mold is opened, causing the thin wall of the pores to rupture and become a waste product. Heating, energy consumption, time-consuming, high cost, is a major drawback of the rubber product process

[0006] The above two systems also have the same defect: the holes are distributed in different places inside or outside the tire. This structure causes the tire to bear pressure unevenly, so that the tire has different stress points, resulting in uneven dynamic balance of the tire. The user will feel the bumps and the comfort is not good

However, the heat resistance of TPE, the material used in this invention, is not as good as that of rubber, and the physical properties decrease greatly as the temperature rises, so the scope of application is limited.

At the same time, compression deformation, elastic recovery, and durability are inferior to those of rubber, and the price is often higher than that of similar rubber.

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