JPH043155Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a gasket that is inserted between two facing members to achieve a seal, and more specifically, the present invention relates to a gasket that is inserted between two facing members to create a seal. The present invention relates to a composite gasket that achieves sealing using a gasket material having the following properties.

[Prior Art] Conventionally, gaskets for sealing cover members such as oil pans and rocker covers used in engines have been made of synthetic rubber, synthetic resin, cork,
Alternatively, a regular gasket made of asbestos or other material is molded or punched into a gasket shape and inserted into the joint surface, or a liquid that is applied to the joint surface and hardens in the latter half of a certain period of time to become a sealing material. Fluid gaskets such as powder or paste are commonly used.

[Problem to be solved by the invention] The above-mentioned fixed-shaped gasket has a sealing effect even if the mounting surface is somewhat rough because the material itself has a certain volume, but the molding cost is high and there is little flexibility in shape. There are drawbacks.

On the other hand, fluid gaskets are liquid, powder, or paste-like and have soft adhesive properties before hardening, so they can be applied to any shape. However, it has the disadvantage that it is not suitable for cases where there is an excessively large gap between the joint surfaces or where the tightening surface pressure is uneven.

The present invention was devised to eliminate these drawbacks, and has good sealing compatibility even in areas with poor gasket joint surface roughness or poor alignment dimension accuracy, and is highly suitable for use in complex areas. The present invention provides a composite gasket that is flexible, has good heat resistance, and vibration-proofing properties.

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

[Means for Solving the Problems] As shown in FIG. 1, the present invention is such that the outer shell A is formed of a flexible gasket material such as lead, synthetic rubber, synthetic resin, or graphite, and It is a composite gasket whose core is composed of a gasket material B in the form of liquid, powder, or paste, and the flexible outer shell A has a hollow part.
and a fluid gasket material B sealed in the hollow part of the outer shell A, and a plurality of strips 1 protruding in the longitudinal direction toward the outer surface of the outer shell A. It is characterized by being integrated.

The liquid, powder, or paste gasket material B used here has the property of becoming an elastic body by curing in the latter half of a certain period of time by heating, room temperature, or chemical change.

[Example] This composite gasket may be produced by forming an outer shell A of a regular gasket having a hollow part using an extruder or the like, and then injecting and filling the hollow part with a non-standard gasket material B. Any efficient forming method may be used without any particular limitation.

As shown in Fig. 2, the composite gasket having the above structure is plastically deformed when it is installed on the gasket joint surface and tightened, but at this time, the gasket material B filling the hollow part of the outer shell A decreases in volume of the hollow part. The groove 2 between the strip 1 and the groove 1 provided on the outer peripheral surface of the outer shell A
It oozes out evenly from the thin and weak parts of the outer shell A and covers the outer circumferential surface of the outer shell A. The amount of gasket material B that oozes out can be controlled by adjusting the shape of the strips 1 and the number of strips provided, and if necessary, it can be controlled by configuring the strips into a mesh shape or the like. You can select the amount of seepage and compression.

Next, the composite gasket from which the gasket material B has oozed out after being compressed is moved to the upper member 3 as shown in FIG.
The gasket material B adheres to the joint surface of the lower member 4 and fills the valleys 2 of the striations 1 of the outer shell A, and hardens in the latter half of a certain period of time, resulting in a volume and strong adhesion of the gasket that could not be obtained with conventional gaskets. Both of these effects can be obtained, and since the outer shell A and the gasket material B can be bent into any shape while maintaining a predetermined cross-sectional shape in the free state, it is possible to install it on any complex structure, making it a revolutionary material. Show flexibility.

Further, since the gasket material B is usually made of silicone or the like, it has high heat resistance and is semi-cured with sufficient volume, thereby greatly improving vibration damping properties.

[Effects of the invention] As explained above, the present invention has the flexibility to be installed and sealed even if the tightening surface pressure is uneven or the joint surface of the gasket is complex and somewhat rough, and it also has a strong adhesion. This makes it an ideal composite gasket, as it provides perfect sealing.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway perspective view of the composite gasket of the present invention. FIGS. 2 and 3 are schematic cross-sectional views showing a state in which the composite gasket of the present invention is installed. A... Outer shell, B... Gasket material, 1... Strip,
2...trough, 3...upper member, 4...lower member.

Claims (1)

[Scope of utility model registration request] In a string-like composite gasket using a flexible gasket material and a fluid gasket material; the composite gasket includes an outer shell having a hollow part and a fluid-like gasket sealed in the hollow part of the outer shell. 1. A composite gasket, characterized in that a plurality of stripes are integrally provided on the outer surface of the outer shell and protrude outward and in the longitudinal direction.