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A method of manufacturing a rubber diaphragm

A technology of a rubber diaphragm and a manufacturing method, applied in the field of rubber manufacturing, can solve the problems of low service life, instability, poor cold resistance, etc., and achieve the effects of prolonging service life, good viscosity, and enhancing viscose ability.

Active Publication Date: 2015-09-09
SUZHOU XIANGYUAN SPEICAL FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of chloroprene rubber are electrical insulation performance, poor cold resistance, raw rubber is unstable during storage, and when used to manufacture rubber diaphragms for centrifugal pumps or diaphragm pumps in slurry transportation, the service life is low and the ductility is low. No, this invention has changed these disadvantages

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A kind of manufacture method of rubber diaphragm, its processing step is as follows:

[0020] (1) Mastication: Take 80g of neoprene raw powder and 20g of nitrile rubber raw powder for plastication to improve its plasticity, and the addition of acetonitrile rubber increases the ductility;

[0021] (2) Mixing: Add 30g of carbon black, 10g of short fiber, 1g of stearic acid, 1.5g of anti-aging agent and 4.0g of accelerator DM4 to the masticated chloroprene rubber raw powder and nitrile rubber raw powder. Mixing in the mixer, the mixing conditions are 8MPa, 190°C, 20min;

[0022] (3) Molding: Pour the molten slurry obtained from mixing into the mold while it is hot, and cool and dry in a vacuum environment at 25°C for 24 hours to obtain a rubber diaphragm. The air bubbles in the rubber can be removed under vacuum conditions. Cooling, it is not easy to make the colloid crack when it dries, making it more compact;

[0023] (4) Treatment: take two pieces of 0...

Embodiment 2

[0031] Example 2: The rest is the same as in Example 1, except that in step (2), the mixing conditions are 8MPa, 100°C, 1h, but at such a temperature, prolonged time cannot enhance mixing As a result, the obtained mixed rubber is easy to crack.

Embodiment 3

[0032] Embodiment 3: the rest is the same as the above-mentioned embodiment 1, the difference is that in step (5), the thickness of the isocyanate glue is thinner, which is the same as the thickness of pregelatinization, and the polyurethane film is easy to fall off.

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Abstract

The invention discloses a manufacturing method of rubber diaphragm, and relates to the rubber manufacturing field. The rubber diaphragm can be manufactured by plasticating, mixing, molding, processing, gelatinizing, gluing and drying. In the manufacturing course of the rubber diaphragm, plasticating can be carried out firstly to improve the plasticity of rubber, so that in the following steps, the rubber can be mixed well with other materials; the malleability is improved by adding acetonitrile rubber; in the step of molding, the rubber is cooled and dried for 24 hours in vacuum environment at 25 DEG C; bubbles in the mixed rubber can be removed in vacuum environment; the rubber mass is less susceptible to cracks in dry conditions due to slow cooling in room temperature and is more compact; polyurethane films are adopted because of relatively good effect of neoprene, the middle part of the rubber diaphragm is more susceptible to wearing than the two ends and the service time of the rubber diaphragm is prolonged by adding two pieces of polyurethane films.

Description

technical field [0001] The invention relates to the field of rubber manufacturing, in particular to a method for manufacturing a rubber diaphragm. Background technique [0002] Rubber: A highly elastic polymer material with reversible deformation. It is elastic at room temperature, can produce large deformation under a small external force, and can return to its original shape after the external force is removed. Rubber is a completely amorphous polymer, its glass transition temperature (T g) is low, and its molecular weight is often large, greater than hundreds of thousands. made by co-aggregation. Such as high tensile strength, excellent heat resistance, light resistance, aging resistance, and oil resistance are superior to natural rubber, styrene-butadiene rubber, and butadiene rubber. It has strong flame resistance and excellent flame retardancy resistance, high chemical stability and good water resistance. The disadvantages of chloroprene rubber are electrical in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B25/08B32B25/16B32B37/12C08L11/00C08L9/02
Inventor 周建颜玉荣
Owner SUZHOU XIANGYUAN SPEICAL FINE CHEM
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