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A kind of rubber vulcanization method and rubber production method

A technology of rubber vulcanization and vulcanization temperature, applied in the field of rubber, can solve the problems of different equipment, high requirements, air pockets, etc., and achieve the effect of improving yield, reducing production costs and saving costs

Active Publication Date: 2021-08-06
厦门市金汤橡塑有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of unsuitable low-hardness rubber formula and high requirements for equipment when the existing technology adopts the method of setting exhaust grooves in the mold or adding vacuum equipment to solve the problem of air pocket or air trapping. And provide a kind of new rubber vulcanization method and rubber production method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This embodiment is used to illustrate the rubber vulcanization method and the rubber production method provided by the present invention.

[0026] The rubber composition used in this embodiment consists of the following components by weight: 100 parts of natural rubber, 40 parts of white carbon black, 10 parts of titanium dioxide, 30 parts of barium sulfate, 28 parts of naphthenic oil, 8 parts of active zinc oxide, 2 parts of stearic acid, 2 parts of sulfur, 1.5 parts of accelerator DM.

[0027] Mixing: put natural rubber into the internal mixer and knead for 3 minutes, put in white carbon black, titanium dioxide, barium sulfate, active zinc oxide and stearic acid and knead for 6 minutes, then put in naphthenic oil and knead for 4 minutes, Finally, add sulfur and accelerator DM and continue mixing for 0.5 minutes. When the temperature reaches 95-105°C, the rubber is discharged. The total mixing time is 13.5 minutes to obtain a banbury compound.

[0028] Open milling: P...

Embodiment 2

[0031] This embodiment is used to illustrate the rubber vulcanization method and the rubber production method provided by the present invention.

[0032] The rubber composition used in this embodiment consists of the following components by weight: 100 parts of EPDM rubber, 30 parts of calcium hydrogen, 50 parts of N774 carbon black, 28 parts of naphthenic oil, 5 parts of active zinc oxide, stearin 1 part of acid, 3.5 parts of dicumyl peroxide, and 1.5 parts of accelerator DM.

[0033] Mixing: put EPDM rubber, active zinc oxide, and stearic acid into the internal mixer and mix for 2 minutes, then add N774 carbon black and light calcium and mix for 6 minutes, then add naphthenic oil and mix for 4 minutes , and finally add dicumyl peroxide and accelerator DM and mix for 0.5 minutes; when the temperature reaches 110-120°C, remove the glue to obtain the banbury compound.

[0034] Open milling: Put the obtained banbury rubber into the open mill, adjust the roller distance to 5-6mm...

Embodiment 3

[0037] This embodiment is used to illustrate the rubber vulcanization method and the rubber production method provided by the present invention.

[0038] The composition of the rubber composition used in this embodiment and the mode of banburying and milling are all the same as in Example 1.

[0039] Spray a small amount of water in the vulcanization mold cavity (according to the volume of the mold cavity is 1L, the consumption of water is 5ml). Cut the open-rolled film into strips, inject the rubber into the injection barrel through the screw extruder on the injection machine, and then inject the rubber into the cavity of the mold through the pressure of the oil cylinder on the injection machine, and then spray the rubber on the surface A small amount of distilled water (according to the volume of the mold cavity is 1L, the amount of water used is 5ml), the mold is closed, the temperature in the mold cavity is controlled at 150±5°C and the pressure is controlled at 15±1MPa an...

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PUM

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Abstract

The invention belongs to the field of rubber, and specifically discloses a rubber vulcanization method and a rubber production method. The rubber vulcanization method includes placing the compounded rubber in the mold cavity, closing the mold, and raising the temperature in the mold cavity to the vulcanization temperature to carry out the vulcanization reaction, wherein, the method also includes before closing the mold. Water is sprayed on the surface of the rubber compound and / or the mold cavity, and during the vulcanization process, the vulcanization temperature is controlled to not be lower than the gasification temperature of water in the mold cavity. Using the method provided by the invention to vulcanize rubber not only greatly improves the yield of vulcanized rubber products, but also can significantly reduce the cleaning frequency of molds and reduce production costs.

Description

technical field [0001] The invention belongs to the field of rubber, and specifically discloses a rubber vulcanization method and a rubber production method. Background technique [0002] The rubber vulcanization process includes mixing the rubber material, then placing the resulting mixed rubber in the mold cavity, closing the mold, and completing the vulcanization in the mold cavity. Among them, vulcanization can form a three-dimensional network structure through intermolecular crosslinking of raw rubber to endow the rubber with excellent elasticity, heat resistance, tensile strength, solvent resistance, etc. The process of placing the rubber compound in the mold cavity usually includes cutting the rubber compound into a specific shape such as a strip, injecting the compound into the injection barrel through a screw extruder on the injection machine table, and then the machine table passes through Cylinder pressure injects the compound into the mold cavity. During the vu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C35/02
Inventor 何青松黄阳李明
Owner 厦门市金汤橡塑有限公司
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