Rubber bushing compacting mould

Abstract

The invention discloses a rubber bushing compacting mould. The mould comprises a pressure head, a base, a support ring, a compacting block and a guide pillar, wherein the guide pillar is fixed on the base, the compacting block is provided with a through-hole, the upper part of the through-hole is tapered, the upper part of the taper of the through-hole is a 3-degree tapered bore, and the lower part of the through-hole is flared. The invention also comprises a baffle ring which is arranged on the compacting block. Therefore, by using the rubber bushing compacting mould of the invention, the external metal bushing can be compacted, the adhesive force between the internal and external metal bushings and the rubber layer can be increased, the rubber layer of the rubber bushing can be prevented from dropping and the service life of the rubber bushing can be prolonged.

Description

technical field [0001] The invention relates to a mold, in particular to a rubber bush extrusion mold. Background technique [0002] The rubber bushing is the rubber elastic joint of the tail rotor pitch rod of the helicopter, which has the characteristics of simple structure and good shock absorption and sound insulation performance. The rubber bushing 1 is vulcanized by the inner metal bushing 11, the outer metal bushing 12 and the rubber layer 13 sandwiched between them. figure 1 It is the structure diagram of the rubber bushing. [0003] During the use of the rubber bushing, the operation of the variable pitch rod drives the outer metal bushing to do variable pitch movement. One side of the rubber layer in the middle of the inner and outer metal bushes is subjected to tensile stress, and the other side is subjected to compressive stress. Under the action of stress, the rubber layer is easy to separate from the inner and outer metal bushings from the joint, and the inst...

AI Technical Summary

Problems solved by technology

[0003] During the use of the rubber bushing, the operation of the variable pitch rod drives the outer metal bushing to do variable pitch movement. One side of the rubber layer in the middle of the inner and outer metal bushes is subjected to tensile stress, and the other side is subjected to compressive stress. Under the action of stress, the rubber layer is easy to separate from the inner and outer metal bushings from the joint, and the instantaneous overload will cause the tensile stress on the side of the rubber layer to be greater than the tensile limit of the rubber, which will damage the chemical bonds between the rubber molecules and form microscopic cracks , after repeated use, the crack spreads, causing the rubber layer to break, and eventually leads to the damage and failure of the rubber bushing

In order to avoid the above situation, it is necessary to use a mold to squeeze the outer metal bushing, so that the rubber layer between the inner and outer metal bushes produces a certain pre-squeeze deformation, so as to increase the distance between the inner and outer metal bushes and the rubber layer. The purpose of the adhesive force, so as to prolong the service life of the product, but the current industrial mold can not meet the processing requirements of this extrusion process

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