Paste-like high-expansion vibration-damping and sound-insulating adhesive for automobiles and its manufacturing process

Abstract

The invention provides automobile paste high-expansion vibration-reduction and sound-insulation rubber and a manufacturing process thereof. Butadiene rubber, EVA, liquid butyronitrile, rubber oil, epoxy resin, polyisobutene, nano activated calcium carbonate, a foaming agent, sulfur, an accelerating agent, a rust inhibitor, a vulcanizing agent, a plasticizer and a tackifier are selected and used, and a pressure kneader is used for mixing the dispersed materials. The rubber is spread on corresponding parts of steel plates in an automobile body welding workshop by a glue spreading pump; the rubber passes through a painting shop after automobile body welding, is heated with an electrophoretic paint drying line to foam to fill up an entire cavity, and achieves the effects of vibration reduction, sound insulation, dust separation and dust prevention.

Description

technical field [0001] The invention relates to the technical field of automobile materials. It is used in the cavity formed by two steel plates on three pillars of the automobile, or between the roof outer plate and the reinforcement rib, and can also be used in the gap between the inner and outer plates of the car body after welding. In particular, it relates to automobile paste-like high-expansion shock-absorbing and sound-insulating adhesive and its manufacturing process. Background technique [0002] In order to pursue quiet, comfortable and environment-friendly cars, the automobile industry must cut off the noise brought by all the cavities of the body, especially the noise and dust brought by the three pillars A, B, and C from the outside air. It cannot be sealed in the welding workshop. When the body is pre-treated and electrophoresed, the liquid must flow in and out of these cavities. If it is sealed after the pre-treatment and electrophoresis, the cavity has been w...

AI Technical Summary

Problems solved by technology

At present, there are two types widely used by designers in the automotive industry. The first is a block rubber material that can expand after heating, and the second is a two-component paste material. Although these two materials can have certain effects , but each has its own defects. The first material is a block material, the process is more complicated, it is not convenient for automatic production and automatic construction, and the shelf life is short, which is not conducive to long-distance transportation and use.

The second type of material is a two-component material, which requires special construction equipment, is expensive, and has poor flame retardancy, which is not conducive to large-area use on automobiles.

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