Transmission rubber piston mold and method for preparing transmission rubber piston with the mold

Abstract

The invention relates to a rubber piston die, and a method for making a rubber piston by using the die, and concretely relates to a speed changer rubber piston die, and a method for making a speed changer rubber piston by using the die. A clamp spring I is connected with a die holder plate I and a lower module; a clamp spring II is connected with a die holder plate II and an upper module; a die core is connected with a clamp spring III through the upper module; a dish-shaped spring is arranged in an installation groove between the upper module and the die core, the lower module is provided with a cavity and a stop bench, the cavity of the lower module comprises a large cavity and a small cavity, the small cavity is adjacent to the stop bench, the small cavity is connected with the large cavity through an arc transition surface, and a connecting position of the small cavity and the arc transition surface is provided with a convex ridge 1; the external periphery of the lower surface of the die core is provided with a convex ridge 2; and an exhaust channel is formed between the lower module and the die core. The method comprises the following steps: preheating the die; putting a skeleton in the cavity; disposing a rubber compound on the stop bench; carrying out vulcanization molding; carrying out die opening; and demolding. The die has the advantages of simple structure, low cost and convenient operation, and the production method has the advantages of simplicity and high yield, and is used for making speed changer rubber pistons.

Description

technical field [0001] The invention relates to a rubber piston mold and a method for preparing a rubber piston by using the mold. Background technique [0002] The structure of the transmission rubber piston mold used in the past is as follows: Figure 5 As shown: the upper mold of this mold is composed of upper mold part 1, mold core part 2, circlip II 8, formwork plate II7, circlip III 16 and ejector mechanism component 18; The pieces 1 are connected together, and the upper mold piece 1 is connected with the formwork plate II7 through the snap spring II8. The lower mold of the mold is composed of the lower mold part 4, the circlip I6 and the formwork plate I5; the lower mold part 4 is connected with the formwork plate I5 through the circlip I6, and the mold is opened by using the mold and the vulcanizing machine (such as Image 6 shown), clamping (such as Figure 4 shown), the whole process of vulcanization. This mold structure has the following defects: before the mol...

AI Technical Summary

Problems solved by technology

This mold structure has the following defects: before the mold is closed, the clamping force is not enough to press the skeleton 15 at the two sealing points. During the closing process, the rubber material will flow through the two sealing points under pressure, so the glue The material will drill out from here, causing the product to drill and overflow, thus affecting the appearance quality of the product

The scrap rate of the product in the production process is as high as 30%

[0003] In addition, using the existing process to prepare the rubber piston of the transmission, there is a problem that the flash of the product is thick and difficult to remove by hand

It is necessary to design special tooling and use a special frequency conversion trimming machine to complete it, but this will not only increase the product processing process, but also increase the cost of equipment and personnel.

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