JPH07108591A - Production of resin applied recessed mold member - Google Patents

Abstract

PURPOSE:To produce a resin applied member capable of being brought into contact with other metal member airtightly without using a seal material by a reduced number of manufacturing processes. CONSTITUTION:Two members 111, 112 having the same shape are opposed each other and a resin pipe 120 is arranged between two members. Both side ends of the resin pipe are closed and two members and the resin pipe are brought to a mutual close contact state. High pressure air is supplied into the resin pipe to expand the resin side to font resin layers to the insides of two members 2. Two members are cut off along the opposed surfaces thereof. Since the number of the manufacturing processes of a resin applied member can be reduced and a mold for forming a resin layer is unnecessary, manufacturing cost can be reduced. Further, the resin layer can be used as a seal material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a concave member with a resin, and more particularly to a method for manufacturing a concave member having a damping material such as a resin adhered to its inner surface.

[0002]

2. Description of the Related Art Conventionally, in order to improve the vibration damping property, it has been proposed to form an elastic body made of rubber or the like on the inner surface of a concave member such as an automobile cylinder head cover by press working (Japanese Utility Model Application No. 62-62). 152774 microfilm (see Jitsukaihei 1-58736)).

[0003]

However, since it is necessary to press the elastic body for each recessed member, there is a possibility that the processing time for the recessed member becomes long. The present invention has been made in view of the above problems, and an object of the present invention is to provide a method of manufacturing a resin-containing concave member capable of reducing the number of manufacturing steps.

[0004]

A method of manufacturing a member with resin according to the present invention comprises a first step in which two concave members having substantially the same shape are opposed to each other and a resin pipe is sandwiched therebetween, and two steps in the first step. A second step of closing both ends of a resin pipe sandwiched between two concave members and connecting the resin pipe to a high pressure gas supply source; and a high pressure gas in the resin pipe connected to the high pressure gas in the second step. And expanding the resin pipe to form a resin layer on the inside of the two concave members that are arranged to face each other, and two concave molds that face each other and have the resin layer formed on the inside in the third step. A fourth step of separating the members at the facing surface.

[0005]

In the method of manufacturing a member with resin according to the present invention, the resin pipe sandwiched between the two members is expanded by the high pressure gas and is stuck inside the concave member. By separating the two concave members at their opposing surfaces, two resin-containing concave members can be manufactured in one processing step.

[0006]

1 is a perspective view of a cylinder head cover of an internal combustion engine for an automobile manufactured by the method of manufacturing a concave member with a resin according to the present invention. For example, a cast metal cover 11 and an inner surface thereof are formed. And a resin layer 12 that has been formed. 2 to 5 are views showing a manufacturing process of a cylinder head cover manufactured by the method of manufacturing a concave member with a resin according to the present invention.

FIG. 2 is an explanatory view of the first step, and FIG. 3 is a perspective view of the first step. Two covers 111 having the same shape are shown.
And 112 face each other and the two covers 11
A flat elliptical resin pipe 120 is arranged between 1 and 112. FIG. 4 is an explanatory view of the second step, in which the two covers 111 and 112 and the resin pipe 120 are brought into close contact with each other to close both ends of the resin pipe 120, and the resin pipe 120 and the high-pressure gas supply source. 131 is connected via a connector 132.

FIG. 5 is an explanatory view of the third step, and FIG. 6 is a perspective view of the third step. The high pressure gas supplied from the high pressure gas supply source 131 expands the resin pipe 120, and the covers 111 and Resin layers 121 and 1 inside 112
22 is formed. The cover 111 or 112
The holes provided in the holes are closed by the hemispherical resin layer 123.

FIG. 7 is an explanatory view of the fourth step, in which the cover 12 of the cylinder head cover having a resin layer on the inner surface is separated by separating the two covers 111 and 112 at the facing surfaces and removing the excess resin. Complete. Further, by sandwiching the resin pipe between the flanges provided around the cylinder head cover, it becomes possible to form the resin layer on the inner surface of the cylinder head cover by the high pressure gas and simultaneously form the resin layer on the flange portion. This makes it possible to maintain airtightness between the cylinder head and the cylinder head cover without inserting a separate gasket between the cylinder head and the cylinder head cover.

In the above embodiment, the cylinder head covers having the same shape are opposed to each other, but the same shape does not matter as long as the members can be closely attached to each other through a resin pipe.

[0011]

According to the method of manufacturing a resin-coated member according to the present invention, it is possible to reduce the number of manufacturing steps of the concave member having the resin layer on the inner surface. Further, since it is not necessary to manufacture a mold for forming the resin layer, the manufacturing cost can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view of a cylinder head cover of an automobile internal combustion engine.

FIG. 2 is an explanatory diagram of a first step.

FIG. 3 is a perspective view of a first step.

FIG. 4 is an explanatory diagram of a second step.

FIG. 5 is an explanatory diagram of a third step.

FIG. 6 is a perspective view of a third step.

FIG. 7 is an explanatory diagram of a fourth step.

[Explanation of reference numerals] 111, 112 ... Outer cover 120 ... Resin pipe 131 ... High-pressure gas 132 ... Connector

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location // B29K 105: 22 B29L 9:00 22:00 31:30

Claims (1)

[Claims] 1. Two concave members having substantially the same shape are opposed to each other,
A first step of sandwiching the resin pipe therebetween, and a second step of closing both ends of the resin pipe sandwiched between the two concave members in the first step and connecting the resin pipe to a high-pressure gas supply source. And a third step of supplying a high-pressure gas into the resin pipe connected to the high-pressure gas in the second step to expand the resin pipe and form a resin layer inside the two concave members arranged opposite to each other. And a fourth step of separating the two opposed concave members having a resin layer formed therein in the third step at opposed surfaces.
The method of manufacturing a concave member with a resin, which comprises: