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EPDM diaphragm piece rubber material watering mixing technology

A diaphragm and mixing technology, applied in the field of EPDM diaphragm rubber mixed with water, can solve the problems of unqualified appearance quality, easy generation of sulfur marks, and increased cost, so as to save labor and power costs and save demoulding agent and softener, and the effect of improving product qualification rate

Active Publication Date: 2016-04-06
HUANGSHAN QUANSHENG SEALING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) Since EPDM diaphragms are vulcanized and molded at a high temperature > 150°C, some low-boiling substances in the rubber are easy to volatilize and produce gas. In addition, the upper and lower areas of this type of product are large, and there are many bumps on the surface. , which hinders the discharge of gas, causing partial suffocation inside and on the surface of the product, often forming rotten air bubbles and nest pores, and the appearance quality is unqualified;
[0005] (2) Due to the special situation of the product structure, it is necessary to use more release agent to take out the product during vulcanization. If there is too much release agent or if the spraying is slightly uneven, there will be a lack of glue or it will be difficult to release the mold, and the operating requirements for workers Very high, product breakage often occurs;
[0006] (3) Due to the large area of ​​the product, the hardness requirements of the product will result in poor fluidity of the rubber compound and easy to produce sulfur marks;
[0007] (4) Products with poor appearance and cracks can only be scrapped, resulting in waste of raw materials, low yield, and increased costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This embodiment relates to a water-mixing process for EPDM diaphragm rubber, which consists of the following steps:

[0032] Step 1, plasticizing with a 16-inch open mill, and the temperature of the sheet output from the open mill is 50°C;

[0033] Step 2, add water to the 35L internal mixer and knead: raise the top bolt, add 20kg of plastic compound rubber, press the top bolt for 10s, add 3kg of auxiliary materials (including filler, vulcanizing agent, the weight ratio of filler and vulcanizing agent is 5:1, pre- Put them together and stir evenly, the filler is conventional filler in this field), add 1.2kg of water (the weight ratio of plastic rubber, auxiliary materials and water is 20:3:1.2), press the top bolt, and raise the top bolt for 230s (< 80°C), unloading, the discharge temperature of the mixer is 90°C, and the mixed rubber is parked for 10 hours;

[0034] Step 3, 16-inch open mill re-refining: under the condition of controlling the temperature of the coolin...

Embodiment 2

[0042] This embodiment relates to a water-mixing process for EPDM diaphragm rubber, which consists of the following steps:

[0043] Step 1, plasticizing with a 16-inch open mill, and the temperature of the sheet output from the open mill is 55°C;

[0044] Step 2, add water to the 35L internal mixer and knead: raise the top bolt, add 20kg of plastic compound rubber, press the top bolt for 10s, add 3kg of auxiliary materials (including filler, vulcanizing agent, the weight ratio of filler and vulcanizing agent is 5:1, pre- Put them together and stir evenly, the filler is conventional filler in this field), add 1.2kg of water (the weight ratio of plastic rubber, auxiliary materials and water is 20:3:1.2), press the top bolt, and raise the top bolt for 240s (< 80°C), unloading, the discharge temperature of the mixer is 80°C, and the mixed rubber material is parked for 14 hours;

[0045] Step 3, 16-inch open mill re-refining: under the condition of controlling the temperature of t...

Embodiment 3

[0053] This embodiment relates to a water-mixing process for EPDM diaphragm rubber, which consists of the following steps:

[0054] Step 1, plasticizing with a 16-inch open mill, and the temperature of the sheet output from the open mill is 60°C;

[0055] Step 2, add water to the 35L internal mixer and knead: raise the top bolt, add 20kg of plastic compound rubber, press the top bolt for 10s, add 3kg of auxiliary materials (including filler, vulcanizing agent, the weight ratio of filler and vulcanizing agent is 5:1, pre- Put them together and stir evenly, the filler is conventional filler in this field), add 1.2kg of water (the weight ratio of plastic rubber, auxiliary materials and water is 20:3:1.2), press the top bolt, and raise the top bolt for 220s (< 80°C), unloading, the discharge temperature of the mixer is 85°C, and the mixed rubber is parked for 20 hours;

[0056] Step 3, 16-inch open mill re-refining: under the condition of controlling the temperature of the coolin...

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PUM

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Abstract

The invention relates to an EPDM diaphragm piece rubber material watering mixing technology. The EPDM diaphragm piece rubber material watering mixing technology includes the following steps of 1, 16-inch open mixing machine plasticating; 2, 35-L internal mixer watering mixing; 3, 16-inch open mixing machine remilling; 4, rubber material standing; 5, 16-inch open mixing machine remilling; 6, rubber material standing; 7, piece discharging; and 8, vulcanizing. By means of the EPDM diaphragm piece rubber material watering mixing technology, softening agents used for a product are reduced, mobility during producing is good, evaporation of water vapor is quick, the requirement for the hardness of the product is met, molding is easy, consumed time is short, and labor and electric power cost are saved; as gas exhausting and mold releasing of the product is easy, the percent of pass of the product is increased; high-cost releasing agents are saved, and the material cost is reduced; dust pollution in the banburying process is reduced, and the environment-friendly effect is achieved; and the performance of the product made of a watering-mixed rubber material is not changed. In this way, the EPDM diaphragm piece rubber material watering mixing technology can be applied to the technical field of EPDM diaphragm piece rubber material watering mixing.

Description

technical field [0001] The invention relates to an EPDM diaphragm rubber material mixing process, in particular to a water-added mixing process for the EPDM diaphragm rubber material. Background technique [0002] At present, the process flow of EPDM (ie: EPDM) diaphragm rubber compounding is: 16-inch open mixer plastic compounding--35L internal mixer mixing--16-inch open mill re-milling--glue Material parking - product vulcanization. [0003] Although the above-mentioned prior art discloses a process flow of EPDM diaphragm compound mixing, which can also meet certain needs, there are still some defects, such as: [0004] (1) Since EPDM diaphragms are vulcanized and molded at a high temperature > 150°C, some low-boiling substances in the rubber are easy to volatilize and produce gas. In addition, the upper and lower areas of this type of product are large, and there are many bumps on the surface. , which hinders the discharge of gas, causing partial suffocation inside a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B7/74B29B7/94B29C35/02B29L7/00
CPCB29B7/7495B29B7/94B29C35/02B29K2023/16B29L2007/002
Inventor 汪媛宣荃刘欢朱江华
Owner HUANGSHAN QUANSHENG SEALING TECH
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