Double-rubber combined oil seal forming die and forming method thereof

Abstract

The invention relates to a double rubber combined oil seal forming die and a forming method thereof. The double rubber combined oil seal forming die comprises an upper die, a middle die, a lower die, a die core and a rubber pressurized die, wherein, the lower die, the upper die and the middle die are combined so as to form a first rubber cavity in an encircling manner, and the upper die and the die core supported by the lower die are combined so as to form a second rubber cavity in an encircling manner; an oil seal support framework arranged in the first rubber cavity is connected with a rubber sealign rib of the lower die in a supporting manner; the second rubber cavity is shaped in advance and then is arranged inside the second rubber cavity formed on the upper inclined surface of the die core; and after first rubbers are filled in a rubber injection cavity of the upper die the first rubbers are injected to the first rubber cavity by the rubber pressurized die through the rubber injection cavity, a first rubber body is processed through vulcanization shaping and secondary vulcanization according to a conventional rubber vulcanization shaping method. The combined oil seal forming die with the double rubbers and the forming method thereof have the advantages as follows: the operation of the die forming technology is simple, the finished product ratio is high, the oil seal structure that is formed in an injection compressing manner is more compact, and the service life of the oil seal can be prolonged.

Description

technical field [0001] The invention relates to a sealing oil seal molding die and a molding method thereof, in particular to a double rubber combined oil seal molding die and a molding method thereof. Background technique [0002] The traditional sealing oil seal, that is, the rubber oil seal only uses one kind of rubber, and its mold forming process is relatively simple. However, with the development of automobiles to high-performance aspects such as high speed and strong bearing capacity, the sealing performance of the oil seal is required to be higher. At the same time, the price of the oil seal is required every year The price reduction range of more than 15% is required, and the price of rubber materials continues to rise, facing market price competition. High-speed oil seals must withstand increasingly harsh high-speed and high-temperature environments, and must adapt to operating conditions such as overloaded vehicles and harsh transportation environments. In order ...

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Problems solved by technology

[0002] The traditional sealing oil seal, that is, the rubber oil seal only uses one kind of rubber, and its molding process is relatively simple. However, with the development of high-performance automobiles such as high speed and strong bearing capacity, the sealing performance of the oil seal is required to be higher. At the same time, the price of the oil seal is required every year All have a price cut of more than 15%, and the price of rubber materials continues to rise, facing market price competition

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