One-step molding vulcanization technology of hollow-core rubber product

A rubber product, a one-time technology, applied in household components, applications, household appliances, etc., can solve the problems of uneven thickness, large tolerances, damaged splices, etc., to eliminate the hidden danger of damage after inflation and avoid secondary damage , the effect of uniform wall thickness

Active Publication Date: 2018-10-26
陕西特种橡胶制品有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method guarantees the overall size, but the splicing will cause damage and convex-concave defects at the splicing place after inflation
In order to eliminate the quality hidden dangers caused by splicing, some enterprises use extrusion or other methods for vulcanization. However, due to the absence of stable supports, the geometrical and dimensional tolerances of the hollow rubber products made by extrusion are too large, resulting in inconsistencies in the geometrical dimensions of the products. First, the uneven thickness of the product will eventually affect the sealing stability of the hollow rubber product after inflation

Method used

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  • One-step molding vulcanization technology of hollow-core rubber product

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Experimental program
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Effect test

Embodiment 1

[0024] The one-time molding vulcanization process of the hollow rubber product of the present embodiment comprises the following steps:

[0025] Step 1, using the coating extrusion process to prepare rubber-coated rods; as figure 1 As shown, the rubber-coated rod consists of a rod core 1 and a rubber coating layer 2 coated on the rod core 1. The material of the rod core 1 is a phase change material, which is mixed with the following raw materials in weight percentage Uniformly made: 7% boron trioxide, 20% aluminum hydroxide, 17% sodium nitrate, 30% paraffin wax, 3% silicon dioxide, 5% talc, 6% rosin, 4% liquid coumarone, hard 2% fatty acid, 6% calcium carbonate, the phase change material is solid at room temperature, and the phase change temperature is 120°C; the rubber is EPDM rubber;

[0026] Step 2. Remove part of both ends of the rod core 1 of the rubber-coated rod described in step 1 (the removal length is about 100mm-200mm), fill it with rubber compound, and embed the a...

Embodiment 2

[0031] The one-time molding vulcanization process of the hollow rubber product of the present embodiment comprises the following steps:

[0032] Step 1, using the coating extrusion process to prepare rubber-coated rods; as figure 1 As shown, the rubber-coated rod consists of a rod core 1 and a rubber coating layer 2 coated on the rod core 1. The material of the rod core 1 is a phase change material, which is mixed with the following raw materials in weight percentage Uniformly made: boron trioxide 5%, aluminum hydroxide 22%, sodium nitrate 15%, solid paraffin 35%, silicon dioxide 2%, talc 3%, rosin 5%, liquid coumarone 4%, hard 1% fatty acid, 8% calcium carbonate, the phase change material is solid at room temperature, and the phase change temperature is 150°C; the rubber is EPDM rubber;

[0033] Step 2. Remove part of both ends of the rod core 1 of the rubber-coated rod described in step 1 (the removal length is about 100mm-200mm), fill it with rubber compound, and embed the...

Embodiment 3

[0038] The one-time molding vulcanization process of the hollow rubber product of the present embodiment comprises the following steps:

[0039] Step 1, using the coating extrusion process to prepare rubber-coated rods; as figure 1 As shown, the rubber-coated rod consists of a rod core 1 and a rubber coating layer 2 coated on the rod core 1. The material of the rod core 1 is a phase change material, which is mixed with the following raw materials in weight percentage Uniformly made: boron trioxide 8%, aluminum hydroxide 18%, sodium nitrate 20%, solid paraffin 25%, silicon dioxide 4%, talc 7%, rosin 7%, liquid coumarone 3%, hard 3% fatty acid, 5% calcium carbonate, the phase change material is solid at room temperature, and the phase change temperature is 135°C; the rubber is EPDM rubber;

[0040] Step 2. Remove part of both ends of the rod core 1 of the rubber-coated rod described in step 1 (the removal length is about 100mm-200mm), fill it with rubber compound, and embed the...

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Abstract

The invention discloses a one-step molding vulcanization technology of a hollow-core rubber product. The one-step molding vulcanization technology comprises the following steps of: step one. preparinga bar material coated with rubber, specifically, the bar material comprises a bar core and a rubber coating layer coating the bar core, and the bar core is made of a phase change material; step two.removing part of both ends of the bar core in a digging manner, then filling the hollow parts of the bar core with rubber compound, and inserting air nozzles in the mixed rubber to obtain a semi-finished product; and step three. putting the semi-finished product in an indirect vulcanizing tank for vulcanization to obtain the hollow core rubber product. According to the one-step molding vulcanization technology, the phase change material is used as the bar core for preparing the bar material coated with the rubber; the phase change material bar core can stably support the rubber coating layer in the molding process, so that the geometric dimensioning of the molded rubber product is ensured; the phase change material bar core is converted into liquid at a high temperature so as to be discharged in the vulcanization process, so that the one-step extrusion molding vulcanization of the hollow rubber product is realized; the geometric dimensioning of the appearance of the prepared hollow core rubber product meets the requirements; the prepared hollow core rubber product has uniform wall thickness; and meanwhile the hidden danger of damage after inflation caused by a mold pressing splicing method is eliminated.

Description

technical field [0001] The invention belongs to the technical field of nuclear island sealing, and in particular relates to a one-time molding vulcanization process of hollow rubber products. Background technique [0002] There are nuclear island refueling pools, spent fuel pools and several water pools in the nuclear power plant, and the reactor pool is isolated from other pools by water gates. The sluice gate in the nuclear power plant is about 10 meters high. Due to the requirements for the sealing ability of the sluice gate, the tolerance requirements for the gap between the door body and the door frame embedded in the pool are very high. The sealing ability of the sluice gate is related to the performance of the sealing ring, which is often used as a sealing ring. It is a hollow rubber product. When the hollow rubber product is inflated, it can effectively expand and fill the gap, thus playing the role of sealing. [0003] However, since most of the hollow rubber produ...

Claims

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Application Information

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IPC IPC(8): B29D99/00C08L91/06C08L45/02C08L93/04C08K13/02C08K3/22C08K5/09C08K3/36C08K3/34
CPCB29D99/0053C08K2003/2227C08L91/06C08L2205/03C08L45/02C08L93/04C08K13/02C08K3/22C08K5/09C08K3/36C08K3/34
Inventor 孙超超陈红卫范伟丰苏有学彭峰李娜李熠孙龙龙齐春孟维民郝中航朱彩军
Owner 陕西特种橡胶制品有限公司
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