Oil seal mold

Abstract

The invention discloses an oil seal mold. The oil seal mold comprises an upper mold plate and a lower mold plate, wherein at least one upper mold core group is arranged on the upper mold plate; the upper mold core group comprises an upper outer mold core and an upper inner mold core, the upper outer mold core is arranged on the upper mold plate, the upper inner mold core can move up and down and is arranged on the corresponding upper outer mold core, and the upper outer mold core and the corresponding upper inner mold core are matched to form a concave cavity; at least one lower mold core is arranged on the lower mold plate, the lower mold core is in one-to-one correspondence with the upper mold core group, an annular boss is arranged on the lower mold core, and when the upper mold plate and the lower mold plate are combined, the annular boss extends into the corresponding concave cavity to form a forming cavity for forming an oil seal; and an oil seal lip forming part used for formingthe lip part of the oil seal is arranged on the upper inner mold core. According to the oil seal mold, the structure is simplified, the assembly error is reduced, the production precision and the rate of finished products of the oil seal are improved, a plurality of mold core groups can be arranged on one set of mold plates, so that the production efficiency of the oil seal is improved.

Description

technical field [0001] The invention relates to a mold for an oil seal. Background technique [0002] At present, the oil seal is a general term for the lip-shaped rubber seal ring of the rotating shaft and the reciprocating motion rubber seal ring; the oil seal is an important mechanical part, which is used to block lubricating oil or grease, so that no leakage will affect the mechanical lubrication and pollute the environment. Therefore, the oil seal is a very important functional mechanical part; among them, the inner skeleton oil seal is a type of oil seal widely used; the main manufacturing process of the inner skeleton oil seal is to prepare the rubber material and the metal skeleton first, and then heat-press the oil seal mold and The finished product is completed through the post-processing process; the post-processing process is mainly cutting the lip, assembling the hoop spring, etc.; since the rubber material and the metal skeleton are hot-pressed by the oil seal ...

AI Technical Summary

Problems solved by technology

[0002] At present, the oil seal is a general term for the lip-shaped rubber seal ring of the rotating shaft and the reciprocating motion rubber seal ring; the oil seal is an important mechanical part, which is used to block lubricating oil or grease, so that no leakage will affect the mechanical lubrication and pollute the environment. Therefore, the oil seal is a very important functional mechanical part; among them, the inner skeleton oil seal is a type of oil seal widely used; the main manufacturing process of the inner skeleton oil seal is to prepare the rubber material and the metal skeleton first, and then heat-press the oil seal mold and The finished product is completed through the post-processing process; the post-processing process is mainly cutting the lip, assembling the hoop spring, etc.; since the rubber material and the metal skeleton are hot-pressed by the oil seal mold, it is the main process to shape the oil seal and realize the structural parameters of the design, so it It is the most important process in the whole manufacturing process, so the oil seal hot press forming mold is the key hardware for oil seal manufacturing; the main part of the oil seal to perform the sealing function is the lip, and the main structural parameters of the lip are the front lip angle, lip tip angle, rear lip angle, and rear lip angle. Lip angle, lip diameter and R value, R value is the distance between the plane where the lip point track circle is located and the plane where the spring groove center point track circle ring is located; scientific structural parameter design and precise manufacturing can achieve the sealing of the oil seal function; however, the structural parameters of the oil seals produced by the oil seal molds in the prior art often fail to meet the design requirements, affect product quality, and even cause seal failure; The mold group includes the upper template, the lower template, and the mold core, etc. The upper template is installed on the upper template frame, the lower template is installed on the lower template frame, and the upper template, the lower template and the mold core cooperate to form a pressure cavity. Mold, a single oil seal forming mold occupies a relatively large space in the entire mold, so that a set of molds can only have a maximum of 36 mold groups for forming oil seals, making the production efficiency of oil seals low

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