JPH0517855B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an improved method for manufacturing an insulator used in a carburetor of an internal combustion engine, and specifically, a method for manufacturing an insulator using two or more types of materials. This invention relates to a method for manufacturing an insulator with a composite gasket.

[Conventional technology]

When assembling a carburetor or the like to an intake manifold, various insulators are used for the purpose of suppressing the conduction of temperature on the intake manifold side to the carburetor.

In terms of conventional thermosetting resins, most thermosetting resins are phenolic resins or composites of phenolic resins and reinforcing fillers, which are molded into desired shapes and put into practical use. However, such materials have almost no sealing power due to their physical properties, so it is impossible to achieve a seal between the flanges of the intake manifold and carburetor.In order to make this part airtight, rubber, synthetic resin, etc. This is dealt with by installing a gasket made of fiber, etc.

[Problem that the invention seeks to solve]

However, the above-mentioned structure has the drawback that the alignment of bolt holes, ventilation holes, etc. is troublesome due to the large number of parts, and installation work is time-consuming. A countermeasure product with a gasket material laminated thereon was also attempted, but there remained the risk of creating a step inside the vent that would disrupt the flow of air.

The present invention eliminates these drawbacks and provides a method for manufacturing an excellent insulator with a gasket that has high performance and is extremely easy to mold and install.

A detailed description will be given below with reference to the drawings.

[Means for solving problems]

As shown in FIGS. 3 and 4, the present invention is an insulator that uses a material having heat insulating properties as a base material 1, such as a thermosetting synthetic resin or hard rubber, or a mixture containing heat-resistant fibers. Shulator A1
and a gasket A2 for sealing the insulator A, in which a gasket material 2 of a compressible elastic plate having a larger shape than a desired shape as shown in FIG. The gasket material 2 is supplied between the parting surfaces 3 of the mold B, the mold B is clamped as shown in FIG. 1, and the gasket material 2 is punched into the shape of the mold cavity 4. The base material 1a of the insulator A1 is filled in the inside of the insulator A1 by a known method and then cured to form the gasket material 2 and the base material 1 as shown in FIG.
It is characterized by a manufacturing method of integrating the insulator A with a gasket.

[Effect]

By the manufacturing method of insulator A with a gasket of the present invention, a large cost reduction was achieved while exhibiting high performance.

That is, one of the features of the present invention is that the two steps of cutting the gasket material 2 and molding the base material 1 are performed in the mold B as shown in FIG. 1, and the mold B is opened and closed frequently. It enables continuous formation without the need for This configuration has a mold cavity 4 as shown in Figure 2.
A gasket material 2 larger than the cross-sectional shape of the parting surface 3 is sandwiched between the mold parting surfaces 3, the mold B is tightened, and the gasket material 2, which has the cross-sectional shape of the mold cavity 4, is inserted into the cavity 4 as it is. leave. Next, as shown in FIG. 1, the base material 1a is filled into the cavity 4 and the insulator A1 is hardened to form an insulator A with a gasket. At this time, since the base material 1a is made of synthetic resin or synthetic rubber that is melted and formed during molding, it can be easily integrated with the gasket material 2 without using advanced and expensive adhesive technology. This greatly reduced the number of work processes and production costs.

〔Example〕

In the drawings explaining the present invention, an insulator A with a two-layer structure consisting of a base material 1 having heat insulating properties and a gasket material 2 is shown, but the insulator A is not limited to this structure. It is also possible to implement a laminated structure in which the gasket materials 2 are continuously punched out and the material 1 is placed between them.
This structure results in an insulator A with a gasket that exhibits a strong sealing force.

〔Effect of the invention〕

As explained above, the present invention is an ideal method for manufacturing an insulator with a gasket that has good moldability and can maintain high sealing force and excellent heat insulation properties.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing a state in which an insulator with a gasket according to the present invention is manufactured. FIG. 2 is a sectional view showing a pre-process in the state shown in FIG. 1. FIG. 3 is a sectional view of an insulator with a gasket obtained according to the present invention. FIG. 4 is a plan view of FIG. 3. A... Insulator with gasket, B...
Mold, 1...Base material, 2...Gasket material, 3...
...parting surface, 4...mold cavity.

Claims (1)

[Claims] 1 An insulator A1 whose base material 1 is made of a material having heat insulating properties such as a thermosetting synthetic resin or hard rubber alone or a mixture mixed with heat-resistant fibers, and an insulator A1 that is integrated with the insulator A1. In the manufacturing method of gasket A2 which forms a seal with the gasket material 2, a compressible elastic plate gasket material 2 having a larger shape than a desired shape is supplied between the parting surfaces 3 of a mold B, and the mold B is clamped to form the gasket material 2. 2 into a mold cavity 4 shape, the material 1a of the base material 1 is filled into the mold cavity 4 and cured to be integrated with the gasket material 2. A method of manufacturing attached insulator A.