TPV clamping strip extrusion die

Abstract

The invention discloses a TPV clamping strip extrusion die which comprises a first mouth-shaped plate, a second mouth-shaped plate, a third mouth-shaped plate, a splitter plate and a fixing plate which are sequentially overlapped and fixed together, cavities which communicate with one another are formed in the first mouth-shaped plate, the second mouth-shaped plate and the third mouth-shaped plate, an auxiliary runner is arranged on one side of the cavity of the second mouth-shaped plate; a melt pool communicating with the first mouth-shaped plate is formed in the splitter plate, a framework positioning core is fixedly connected to the fixing plate, a guide hole is formed in the center of the framework positioning core, and main runners are symmetrically formed in the two sides of the framework positioning core. Multi-plate mouth-shaped matching is adopted, two feeding ports and one feeding port are adopted to control feeding of the appearance part of the product, each section of cavity is gradually decreased, the back pressure of each mouth-shaped inlet is increased, and roughness, lines and melt cracking of the appearance surface of the product are reduced; and the other feeding port controls feeding of the lip part, and the length of the lip of the product is controlled by independently adjusting the feeding amount of the lip part.

Description

technical field [0001] The invention relates to a TPV strip extrusion die, which belongs to the technical field of automobile product manufacturing. Background technique [0002] The existing TPV strip extrusion die structure has the following problems: (1) There is only one feed port for the TPV material required for the cavity, and the feed pressure is not easy to control, and the product surface is prone to melt fracture or lines, and the surface is rough and melted. (2) There is no melt pool with equal wall thickness, the TPV rubber is basically cut at 90°, the balance of the coating pressure on both sides of the steel strip is not easy to adjust, and it needs to be repeated during production. The backbone position can only be determined by trial and error to ensure that the TPV completely coats the backbone. Contents of the invention [0003] The object of the present invention is to provide a TPV strip extrusion die with simple structure, convenient debugging, high ...

AI Technical Summary

Problems solved by technology

[0002] The existing TPV strip extrusion die structure has the following problems: (1) There is only one feed port for the TPV material required for the cavity, and the feed pressure is not easy to control, and the product surface is prone to melt fracture or lines, and the surface is rough and melted. (2) There is no melt pool with equal wall thickness, the TPV rubber is basically cut at 90°, the balance of the coating pressure on both sides of the steel strip is not easy to adjust, and it needs to be repeated during production. The backbone position can only be determined by trial and error to ensure that the TPV completely covers the backbone

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