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Membrane used for linear pneumatic actuator, and production method thereof

A pneumatic actuator and straight-stroke technology, applied in chemical instruments and methods, layered products, rubber layered products, etc., can solve problems such as short service life, diaphragm deformation, bubbling, etc., and achieve excellent stability and performance Reliable, oil-resistant results

Inactive Publication Date: 2013-01-16
SHANDONG DINGTAI ENERGY SAVING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in the pneumatic actuators in the prior art, the diaphragm that acts as a seal in the cavity is unreasonable due to the unreasonable selection of material components, so that the pressure resistance, sealing performance, oil resistance, and tensile properties of the diaphragm cannot reach the corresponding levels. skills requirement
Especially when the intake pressure is too high, the diaphragm is prone to stress concentration and deformation, resulting in air leakage, bubbling or even tearing of the diaphragm
In addition, after a period of use, some diaphragms are prone to aging and cracks. The service life is short and they need to be replaced frequently, which seriously affects the normal production and causes great economic losses to the enterprise.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1 Preparing Diaphragms for Linear Swing Pneumatic Actuators

[0019] Raw material component parts by weight are as follows:

[0020] 30kg of silica gel, 20kg of nitrile rubber, 15kg of fluorine rubber, 25kg of EPDM rubber, and 5kg of connecting cloth.

[0021] The production method comprises the following process steps:

[0022] Weigh the raw materials; mix the prepared raw materials, the temperature of the rubber mixing is 52°C, and the time is 30 minutes; then fill the refined rubber into the abrasive tool, one layer of rubber and one layer of cloth, until three layers of cloth are loaded; Cover the mold cover and put it into a vulcanizer for vulcanization. The temperature during the vulcanization process is 140°C. After 60 minutes, the vulcanized diaphragm is formed, and the required diaphragm can be obtained after stopping the machine.

[0023] After testing, the working pressure range of the diaphragm in this embodiment is 0.7MPa, the life span is 3549.8...

Embodiment 2

[0024] Example 2 Preparing Diaphragms for Linear Swing Pneumatic Actuators

[0025] Raw material component parts by weight are as follows:

[0026] 30kg of silica gel, 30kg of nitrile rubber, 25kg of fluorine rubber, 30kg of EPDM rubber, and 10kg of connecting cloth.

[0027] The production method comprises the following process steps:

[0028] Weigh the raw materials; mix the prepared raw materials at a temperature of 55°C for 40 minutes; then fill the refined rubber into the abrasive tool, one layer of rubber and one layer of cloth, until three layers of cloth are loaded; Cover the mold cover and put it into the vulcanizer for vulcanization. During the vulcanization process, the temperature is controlled at 160°C. After 70 minutes, the vulcanized diaphragm is formed, and the required diaphragm can be obtained after stopping the machine.

[0029] After testing, the working pressure range of the diaphragm in this embodiment is 0.62MPa, the service life is up to 334576 time...

Embodiment 3

[0030] Example 3 Preparing Diaphragms for Linear Swing Pneumatic Actuators

[0031] Raw material component parts by weight are as follows:

[0032] 20kg of silica gel, 20kg of nitrile rubber, 15kg of fluorine rubber, 20kg of EPDM rubber, and 5kg of connecting cloth.

[0033] The production method comprises the following process steps:

[0034] Weigh the raw materials; mix the prepared raw materials, the mixing temperature is 60°C, and the time is 38 minutes; then fill the refined rubber into the abrasive tool, one layer of rubber and one layer of cloth, until three layers of cloth are loaded; Cover the mold cover and put it into the vulcanizer for vulcanization. During the vulcanization process, the temperature is controlled at 150°C. After 50 minutes, the vulcanized diaphragm is formed, and the required diaphragm is obtained after stopping the machine.

[0035] After testing, the working pressure range of the diaphragm in this embodiment is 0.56MPa, the life span is 32187...

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PUM

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Abstract

The invention discloses a membrane used for a linear pneumatic actuator, and relates to the technical field of pneumatic actuators. The membrane used for the linear pneumatic actuator is prepared by employing 20-30 parts of a silicon rubber, 20-30 parts of a nitrile butadiene rubber, 54-67 parts of a fluorine rubber, 20-30 parts of an ethylene propylene diene monomer rubber and 5-10 parts of cloth as raw materials, and through material preparation, a rubber mixing process and a vulcanization molding process. Due to the adoption of the above raw material components and special producing technology, compared with a conventional membrane used for a pneumatic actuator, the membrane provided by the invention has excellent pressure resistant performance, sealing performance, heat resistant performance and stability, and is small in size, light in weight and reliable in performance.

Description

technical field [0001] The invention relates to the technical field of pneumatic actuators, in particular to a diaphragm used for linear stroke pneumatic actuators. Background technique [0002] At present, in the pneumatic actuators in the prior art, the diaphragm that acts as a seal in the cavity is unreasonable due to the unreasonable selection of material components, so that the pressure resistance, sealing performance, oil resistance, and tensile properties of the diaphragm cannot reach the corresponding levels. skills requirement. Especially when the intake pressure is too high, the diaphragm is prone to stress concentration and deformation, resulting in air leakage, bubbling or even tearing of the diaphragm. In addition, after a period of use, some diaphragms are prone to aging and cracks. The service life is short and they need to be replaced frequently, which seriously affects the normal production and causes great economic losses to the enterprise. Contents of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/06B32B27/12B32B25/04B32B25/10C08L83/04C08L9/02C08L27/12C08L23/16
Inventor 冯启云袁桔红
Owner SHANDONG DINGTAI ENERGY SAVING TECH