Polyurethane rubber bending die

Abstract

The invention relates to a polyurethane rubber bending die which comprises a male die body, rubber and a female die body. A rubber pad is arranged on the rubber. A pressure reduction groove is formed in the middle on the top of the rubber downwards. A steel cushion plate is arranged in a pit bottom of the female die body. The upper surface of the steel cushion plate is a curved surface. Steel bars are arranged in the two sides of the steel cushion plate in a cushioned mode. The steel bars are tangent to the top ends of the female die body, a baffle and the rubber. A cavity is formed between the rubber and the steel cushion plate. The curvature radius of the upper surface of the steel cushion plate is equal to the sum of the curvature radius of a rubber forming part and the thickness of the rubber cushion. Due to the fact that the cavity is formed between the rubber and the steel cushion plate, rubber pressure formed during bending forming can be reduced; due to the fact that the steel cushion plate is additionally arranged, and the upper surface of the steel cushion plate is the curved surface, it can be ensured that forming force on the whole curved surface is uniform; due to the fact that the pressure reduction groove is formed in the top of the rubber, side pressure formed during forming can be increased, springback can be eliminated, and the workpiece quality and dimensional accuracy are improved.

Description

technical field [0001] The invention relates to the field of molds, in particular to a polyurethane rubber bending mold. Background technique [0002] The bending process is based on the needs of the shape of the part, through the mold and the press to bend the blank into a certain angle, and the stamping process method of a certain shape workpiece. It is widely used, such as many cover parts on cars, cabinet frame components of cars, Handles on the car, foot brackets, bracket components on the bicycle, handles, small ones such as door buckles, clips (iron clips), etc. [0003] Urethane rubber bending dies are used for sheet metal bending. Usually there is only one steel punch (or die) and a container frame for installing polyurethane rubber. The structure is simple, versatile, and the manufacturing cost is low. They are smaller when bent in metal dies, thus showing many advantages. However, when using a polyurethane rubber bending die, on the one hand, the forming pressur...

AI Technical Summary

Problems solved by technology

However, when using a polyurethane rubber bending die, on the one hand, the forming pressure of the rubber pad is not easy to adjust, and on the other hand, the forming pressure is unevenly distributed, which reduces the quality and dimensional accuracy of the formed part.

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