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Rubber framework grease seal for automobile gear box and manufacturing method thereof

A technology for automobile gearboxes and skeleton oil seals, which is applied in the field of rubber sealing products, and can solve problems such as large compression set, poor reliability of oil seals, and poor sealing effects

Inactive Publication Date: 2008-12-10
青岛茂林橡胶制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And because automobiles are developing towards high speeds, hyperbolic gear oils such as sulfur and phosphorus are used for the lubrication of gearboxes, and the oil temperature can reach above 100°C. The rapid hardening in the oil loses the sealing effect. In recent years, the development of acrylic rubber can solve the rapid hardening of the hyperbolic gear oil, but there are the following shortcomings: 1. Large compression set, poor wear resistance, resulting in poor reliability of the oil seal, Short life and poor sealing effect
2. Rubber is easy to pollute the mold, resulting in high scrap rate, long vulcanization time, low production efficiency and high manufacturing cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A part by weight of a composition is expressed in kilograms.

[0030] Step 1: Mixing

[0031] ①. Put 100 parts of active chlorine-type acrylate rubber AR840 into the XK400 or XK450 open mill, the roller temperature is normal temperature to 40-50 ℃, the roller distance is 2-3mm, and the thicker roller distance is adjusted to 4-5mm to press the surface smooth;

[0032] ②. Adjust the temperature of the front roll to 35-40°C and adjust the temperature of the rear roll to 40-45°C. Add 0.5 parts of vulcanization activator stearic acid, 1.5 parts of operating aid TM-80, 1 part of anti-aging agent 445, MB and their supplements. Strong agent carbon black 4 parts and white carbon black 22 parts;

[0033] ③. Put in 2 parts of vulcanizing agent sodium stearate and 0.5 parts of accelerator sulfur and potassium stearate under the mixing condition that the roller temperature is not higher than 50 ℃, and make triangular bags 4-5 times, and adjust the roller distance to 0.2-0.5mm, thi...

Embodiment 2

[0044] A part by weight of a composition is expressed in kilograms.

[0045] Step 1: Mixing

[0046] ①Put 100 parts of active chlorine-type acrylate rubber AR840 into XK400 or XK450 open mill, roll temperature to 40-50°C at normal temperature, roll distance 2-3mm, thicken the roll distance to 4-5mm to press the surface smooth;

[0047] ②. Adjust the temperature of the front roll to 35-40°C and adjust the roll temperature to 40-45°C after adding 0.75 parts of vulcanization activator stearic acid, 1.75 parts of operating aid TM-80, 1.5 parts of antioxidant 445 and 1.5 parts of MB and their reinforcements 5 parts of agent carbon black and 25 parts of white carbon black;

[0048] ③. Put in 2.5 parts of vulcanizing agent sodium stearate and 0.55 parts of accelerator sulfur and potassium stearate under the mixing condition that the roller temperature is not higher than 50°C, and make triangular bags 4-5 times, and adjust the roller distance to 0.2-0.5mm, thin pass 3-5 times, put t...

Embodiment 3

[0059] A part by weight of a composition is expressed in kilograms.

[0060] Step 1: Mixing

[0061] ①Put 100 parts of active chlorine-type acrylate rubber AR840 into XK400 or XK450 open mill, roll temperature to 40-50°C at normal temperature, roll distance 2-3mm, thicken the roll distance to 4-5mm to press the surface smooth;

[0062] ②. Adjust the temperature of the front roller to 35-40°C and adjust the temperature of the rear roller to 40-45°C. Add 1 part of vulcanization activator stearic acid, 2 parts of operating aid TM-802, 2 parts of anti-aging agent 445, MB and their reinforcements 6 parts of agent carbon black and 28 parts of white carbon black;

[0063] ③. Put in 3 parts of vulcanizing agent sodium stearate and 0.6 parts of accelerator sulfur and potassium stearate under the mixing condition that the roller temperature is not higher than 50°C, and make triangular bags 4-5 times, and adjust the roller distance to 0.2-0.5mm, thin pass 3-5 times, put thick roll dist...

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PUM

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Abstract

The invention provides a rubber framework oil seal used for a gear box of an automobile and a manufacturing method thereof. The rubber framework oil seal comprises the following compositions in weight portion: 100 portions of activated chlorine type acrylate adhesive AR840, 0.5 to 1 portion of a vulcanizing activator stearic acid, 1.5 to 2 portions of a process additive TM-80, 2 to 3 portions of a vulcanizing agent sodium stearate, 0.5 to 0.6 portion of an accelerating agent sulfur and potassium stearate, 1 to 2 portions of an age inhibitor 445, 1 to 2 portions of MB, 4 to 6 portions of a strengthening agent carbon soot and 22 to 28 portions of a siliceous reinforcing agent. The rubber framework oil seal has the characteristics of stable size of hypoid gear oil of the gear box, oil resistance, anti-aging property, and sealing reliability, etc.

Description

technical field [0001] The invention belongs to the technical field of rubber sealing products, and specifically discloses a rubber composition for good sealing of gearboxes, input shafts, output shafts and framework oil seals and a manufacturing method thereof. Background technique [0002] Due to the rapid development of automobiles in my country, in 2006, the annual output of automobiles was more than 7 million, and the number of social automobiles could reach 40 million. However, the service life of rubber used in automobile gearboxes generally does not exceed 2 years, so the annual demand for gearbox oil seals is 50 million. The market demand is very large. And because automobiles are developing towards high speeds, hyperbolic gear oils such as sulfur and phosphorus are used for the lubrication of gearboxes, and the oil temperature can reach above 100°C. The rapid hardening in the oil loses the sealing effect. In recent years, the development of acrylic rubber can solve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/04C08K13/02C08K5/09C08K5/098C08K3/06C08K3/04C08K3/36B29C69/02B29B7/38B29B11/10B29C35/02B29C65/64F16J15/16B29K33/04B29L31/26
CPCB29C48/465
Inventor 高福年韩志刚
Owner 青岛茂林橡胶制品有限公司
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