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Rubber material forming die for low-compression EPDM sealing ring and application and processing method thereof

A processing method and sealing ring technology, which is applied in the field of rubber seal processing, can solve the problems that special-shaped rubber rings are difficult to take into account high temperature resistance, high heat cooling liquid immersion resistance, low compression permanent deformation shape quality, etc., to achieve both shape quality and performance requirements , Reduce product scrap rate, not easy to fall off

Pending Publication Date: 2018-08-03
南京金三力高分子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides a rubber forming mouth shape of a low-pressure variable EPDM sealing ring, and its purpose is to solve the problem that the existing special-shaped rubber rings used in the production of automobile water pumps are difficult to take into account the performance and appearance of high temperature resistance, high heat cooling liquid immersion resistance, and low compression permanent deformation. quality problem

Method used

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  • Rubber material forming die for low-compression EPDM sealing ring and application and processing method thereof
  • Rubber material forming die for low-compression EPDM sealing ring and application and processing method thereof
  • Rubber material forming die for low-compression EPDM sealing ring and application and processing method thereof

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Experimental program
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Effect test

Embodiment 1

[0044] Such as figure 2 As shown, the present embodiment provides a rubber forming mouth shape of a low-pressure variable EPDM sealing ring, including a rubber outlet, and the rubber outlet includes four material opening sections connected at one end, and the four material opening sections are respectively the first material opening Section 1, the second mouth section 2, the third mouth section 3 and the fourth mouth section 4.

[0045] In this embodiment, the four feed opening sections are fan-shaped, the centers of rotation coincide, and the circumferential direction is scattered; and the parameters and mutual positions of each feed opening section are limited, that is, the diameter of the first feed opening section 1 is The width of the first feed opening is 101, that is, the chord length of the arc is 10-20 mm; the diameter of the second feed opening section 2 is The second feed opening width 201 is 10-20mm; the diameter of the third feed opening section 3 is The thi...

Embodiment 2

[0049] This embodiment provides a kind of processing method of low-pressure variable EPDM sealing ring, obtains the semi-finished product rubber material of specific shape by adopting the rubber material molding mouth shape of low-pressure variable EPDM sealing ring in embodiment 1, and vulcanization molding produces such as figure 1 Automotive water pump EPDM seal shown.

[0050] In this embodiment, the diameter of the first feed port section 1 in the rubber forming mouth is The first feed opening width 101 is 20mm; the diameter of the second feed opening section 2 is The second feed opening width 201 is 120mm; the diameter of the third feed opening section 3 is The third feed opening width 301 is 20mm; the diameter of the fourth feed opening section 4 is The fourth opening width 401 is 20mm; the angle α between the centerline of the first opening section 1 and the second opening section 2 is 78°; the angle α between the centerline of the first opening section 1 and the...

Embodiment 3

[0065] This embodiment provides a processing method for a low-voltage transformer EPDM sealing ring, which is basically the same as in Embodiment 2, except that:

[0066] In this embodiment, the diameter of the first feed port section 1 in the rubber forming mouth is The first feed opening width 101 is 10mm; the diameter of the second feed opening section 2 is The second feed opening width 201 is 10mm; the diameter of the third feed opening section 3 is The third feed opening width 301 is 10mm; the diameter of the fourth feed opening section 4 is The fourth mouth width 401 is 10mm; the angle α between the centerline of the first mouth section 1 and the second mouth section 2 is 88°; the angle α between the centerline of the first mouth section 1 and the fourth mouth section 4 The included angle β is 135°; the included angle γ between the centerlines of the third feed opening section 3 and the fourth feed opening section 4 is 65°.

[0067] In step one, the EPDM body sizin...

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Abstract

The invention discloses a rubber material forming die for a low-compression EPDM sealing ring and an application and processing method of the low-compression EPDM sealing ring and belongs to the technical field of rubber sealing part processing. The rubber material forming die comprises a rubber material outlet. The rubber material outlet comprises four material port sections connected at one end,wherein the four material port sections are correspondingly the first material port section, the second material port section, the third material port section and the fourth material port section. The four material port sections are all in a fan shape and the rotation centers are coincident. The processing method of the sealing ring comprises the following steps that firstly, the rubber materialforming die for the low-compression EPDM sealing ring is adopted, and a semi-finished rubber material is processed and formed through a rubber pre-forming machine; then, a die cavity of a vulcanization forming die is filled with the semi-finished rubber material, and the semi-finished rubber material is arranged in place; and finally, vulcanization forming is carried out. According to the shape characteristics of special-shaped rubber rings, the vulcanization performance of the EPDM material is comprehensively taken into account, the unique rubber material forming die is designed, the special-shaped rubber material is obtained, and the appearance quality and performance requirements can be taken into account by adopting the rubber material vulcanization forming, so that the rejection rateof products is lowered effectively, and the production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of processing rubber seals, and relates to the processing of EPDM rubber sealing rings used in automobile water pumps, and more specifically, to a rubber forming shape and processing method for low-pressure variable EPDM sealing rings. Background technique [0002] As we all know, the automobile water pump is an indispensable and important part of the automobile engine cooling system. When the combustible mixer is burning, the gas pressure and temperature in the cylinder rise sharply, and the instantaneous pressure can reach 3MPa~5MPa, and the instantaneous temperature can reach 2200K~2800K. If the parts in contact with high-temperature gas (such as cylinder block, cylinder head, piston, valve, etc.) are not cooled in time, the moving parts will destroy the normal gap due to thermal expansion, or get stuck due to the failure of lubricating oil at high temperature. If the parts die, the mechanical strength of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C35/02B29C33/42B29C33/00C08L23/16C08K3/04C08K3/22C08K5/09C08K5/18C08K13/02
CPCC08K3/04C08K3/22C08K5/09C08K5/18C08K13/02B29C33/00B29C33/42B29C35/007B29C35/02C08L2201/08C08K2201/014C08L23/16
Inventor 芮巧红魏二楼金国秋
Owner 南京金三力高分子科技有限公司
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