JPS62158780A - Hermetical sealing material - Google Patents

Abstract

PURPOSE:To obtain a hermetical sealing material which will not be forced out and can maintain the sealing and rust-preventive properties for a long period of time, by inserting a metallic springy material in between layers of a matrix comprising an organic material having elasticity or plasticity. CONSTITUTION:A hermetical sealing material made by inserting a metallic springy material 2 in between layers of a matrix 1 comprising a material having elasticity or plasticity (e.g., a natural or synthetic rubber material or a thermosetting adhesive based on, e.g., an epoxy or urethane resin). Since the springy material 2 is placed in the center, no excessive tightening force acts on the surrounding elastic or plastic material 1, and therefore the material 1 will not be forced out. Further, since the tightening torque for the sealing material does not decrease through thermal history or prolonged used, the sealing and rust-preventive properties can be maintained for a long period.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is useful for joining exterior panels in the assembly process of automobile bodies or for attaching podium parts such as door fringes to exterior panels. Or it relates to a sealing material that is inserted between parts to seal joints.

[Conventional technology]

There are two methods for assembling POD panels in automobile manufacturing: a joining force method using welding and an assembling method using bolt tightening. In most cases, bolts are used to assemble parts such as the door to the main podium, and the front fender, hood, front balance panel, and other parts of the podium. .

Conventionally, in areas where bolted connections such as those mentioned above have been made, seals made of tape or an elastic or plastic material cut or molded into a shape that matches the joint are used to prevent leakage and to prevent rust. It may pinch the material.

[Problem that the invention seeks to solve]

However, with conventional sealing materials, due to their elasticity or plasticity, the tightening torque remains constant when tightening the ports. This problem sometimes occurs.

In addition, these sealants are usually used in the first process of White Pode, and then are subjected to the undercoat electrodeposition coating and L coating, so they are subjected to the heat history of the paint drying oven in each process, resulting in a decrease in rubber elasticity. Otherwise, there are frequent problems such as plastic deformation, failure to maintain the initial set torque, reduced sealing performance of joints, rain leakage, rust, etc.

Furthermore, if the sealant protrudes as described above, there is a problem in that the paint will not adhere to the underside of the protruding portion, which may cause rust to form there.

The present invention aims to solve the problem of the conventional sealing material described in 1. It is possible to obtain uniform tightening torque by normal bolt tightening, and it is possible to obtain torque evenly due to thermal history during processing or long-term use. The aim is to provide a sealing material that does not reduce its strength.

[Means for solving problems]

The sealing material of the present invention is characterized in that a metallic spring elastic body is inserted into an intermediate layer of an organic material matrix having elasticity or plasticity.

[For production]

The organic material having elasticity or plasticity used in the present invention may be a commonly used sealant material, such as natural rubber-based materials such as unvulcanized rubber, semi-vulcanized or vulcanized rubber, or butyl rubber or ltEPDM (ethylene brobylene diene). Synthetic rubber materials such as Turbo Limer) may also be used, and ordinary adhesives 1 such as epoxy, urethane, and polyester-phenol thermosetting adhesives may also be used.
Before hardening, it can be used as a plastic material.

The spring elastic body inserted into an elastic body or plastic body made of the above organic material and having a predetermined shape will be referred to as a buffer body from now on, since tightening in the vertical direction has the effect of buffering the load. Metallic materials with spring characteristics 1 For example, steel materials, stainless steel materials, or sheets coated with zinc are generally corrugated. It can be anything.

Even if the sealing material is subjected to a vertical load due to bolt tightening, the shock absorber has spring elasticity, so it plays the role of a spacer that maintains the gap distance.

Therefore, the tightening torque is constant, and since it is not compressed more than necessary, the elastic or plastic body does not protrude outside.Also, since the tightening is performed between the metal member - buffer body - metal member, thermal history and aging There is no reduction in torque and therefore no deterioration in sealing performance.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

Example 1 FIG. 1 shows a perspective view of a corrugated sealing material, 1
indicates an elastic body or a plastic body, and 2 indicates a buffer body.

Such a sealing material can be obtained by applying a rubber or plastic material to both sides of a flat metal plate by appropriate means and then press-molding it into a corrugated shape. 3 shows bolt holes provided by post-processing.

FIG. 2 shows a cross-sectional view taken along line A-A' in FIG. When tightened with the nut 5, the elastic or plastic body 1 is deformed and a complete seal can be created between the panels 6 and 7.

Embodiment 2 FIG. 4 shows a cross-sectional view of a sealing material in which an elastic body or a plastic body l is laminated on both sides of a buffer body 2' that has been previously processed into a corrugated plate shape. This is possible by using Furthermore, the buffer body 2' can be flattened by applying adhesive 1, for example, epoxy resin, to both sides. With such a sealant, weak tightening or torque can seal the joint. The epoxy resin is hardened by heating during the subsequent painting and drying process.

〔Effect of the invention〕

As mentioned above, the sealing material of the present invention has a buffer body with spring elasticity placed in the center, so that excessive tightening force is not applied to the surrounding elastic or plastic body, so the sealing material does not protrude outside. Since the tightening torque does not decrease due to heat history or aging, sealing performance and rust prevention properties can be maintained over a long period of time.

[Brief explanation of drawings]

FIG. 1 shows a perspective view of the sealing material of Example 1. FIG. 2 shows a cross-sectional view of the sealing material of Example 1, FIG. 3 shows a cross-sectional view of a panel joint using the sealing material of Example 1, and FIG. 4 shows a cross-sectional view of the sealing material of Example 2. represents a diagram. In the figure, l...Elastic body or plastic body 22...Buffer body 3...
・Bolt hole 4... Porto 5... Nut 6, 7... Panel patent applicant Toyota Motor Corporation Tsuchiyagi Co., Ltd. 1 Figure 4... Main port 5... Mr. , Toro, 7...1111ki I Shiga 3 figure Muga 4 figure

Claims (1)

[Claims] A sealing material characterized in that a metal spring elastic body is inserted into an intermediate layer of an organic material matrix having elasticity or plasticity.