Method and apparatus for producing plastic cylinder head cover

Abstract

A method produces a plastic cylinder head cover having an oil control valve holder as an integral part thereof by insert molding. The method includes a step of setting the oil control valve holder in one of a pair of molds that can approach and separate from each other; and a step of clamping the pair of molds and injecting plastic material. In the step of injecting plastic material, the oil control valve holder is set in the one mold with an insert pin being inserted in a hole thereof. Another a method produces a plastic cylinder head cover having an oil control valve holder as an integral part thereof by insert molding. The oil control valve holder includes a mounting surface on which it is mounted to a cylinder head, a hole oriented along an axis inclined to a plane direction of the mounting surface, and two faces containing open ends of the hole. The method includes a step of setting the oil control valve holder in one of a pair of molds that can approach and separate from each other; and a step of clamping the pair of molds and injecting plastic material. In the step of injecting plastic material, the oil control valve holder is set in the one mold with an abutment insert being abutted against the mounting surface near one of the two faces having a larger area than the other.

Description

technical field [0001] The present invention relates to a method and apparatus for manufacturing a resin cylinder head cover, and more specifically, to a method for manufacturing a resin cylinder head cover capable of preventing deformation of a hole portion of a lubricating oil control valve holder during insert molding. manufacturing device. [0002] Another present invention relates to a method and a manufacturing apparatus for a resin cylinder head cover, and more specifically, to a method capable of preventing deformation of a hole portion of a lubricating oil control valve holder and preventing the lubricating oil control valve from being retained during insert molding. A method and apparatus for manufacturing a resin cylinder head cover in which the mounting surface of a component is damaged or deformed. Background technique [0003] Conventionally, as a cylinder head cover for an internal combustion engine, a structure in which a metal OCV holder (hereinafter also a...

AI Technical Summary

Problems solved by technology

[0006] However, in the resin head cover disclosed in Japanese Patent Laid-Open No. 2006-316640, the middle portion of the hole of the OCV holder is hollow during insert molding. Figure 11 and Figure 12 As shown, the hole 107 of the OCV holder 103 may be deformed by the resin filling pressure during molding and the shrinkage after molding.

If the hole 107 of the OCV holder 103 is deformed in this way, oil leakage may occur between the OCV holder and the OCV when the head cover is used.

[0007] However, in the above-mentioned OCV holder, it is difficult to simultaneously improve the dimensional accuracy of the hole in the cylinder head cover and the mounting surface relative to the cover body, for example, the dimensional accuracy of the cover body relative to the hole is increased while the dimensional accuracy of the cover body relative to the mounting surface is reduced.

In this case, in the resin cylinder head cover of the above-mentioned Japanese Patent Laid-Open No. 2007-107479, since the entire mounting surface of the OCV holder is in contact with the lower mold, damage is likely to occur on the mounting surface of the OCV holder. , or deformed by excessive pressing

As a result, when using the head cover, there is a risk of oil leakage between the O CV holder and the head

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