Composite mould for fabricating multilayer composite guide pipe

Abstract

A composite mould for fabricating multilayer composite guide pipe comprises a mouth mould and a core mould. The mouth mould includes a first and a second mouth mould independent of and adjacent to each other; the core mould is fitted in the first and second mouth moulds, and has a space reserved to serve as a material outlet; the bottom end of the first mouth mould is provided with a first material inlet, and a first material outlet of the first mouth mould communicating with the material inlet is located below the core mould; a total material inlet is disposed on the side of the first mouth mould and is adjacent to the core mould; and a first channel of the first mouth mould is disposed in the periphery of the core mould, a second annular material inlet is disposed in the second mouth mould, and the second mouth mould is provided therein with a second channel communicating with the material outlet of the first mouth mould. The invention solves the problem of complex fabricating process of the conventional multilayer composite guide pipe by multiple extruding steps, has good bondability between two adjacent layers, solves the problem of easy stratification of the composite pipe, and has simple operation, easy clearing and convenient application.

Description

technical field [0001] The invention relates to a mold, in particular to a combined mold for manufacturing multilayer composite pipes. Background technique [0002] As the requirements for the use of plastic pipes are getting higher and higher, two or more layers of material pipes with different properties are required, such as high-pressure composite pipes. The outer layer is required to be a flexible material, the middle layer is a moderately flexible material, and the inner layer is resistant Harder material at high pressure. At present, the commonly used method is to first extrude the inner layer tube → secondly coat the middle layer → coat the outermost layer three times. The process is complicated, and the catheter is easily delaminated due to other factors. Moreover, a set of molds is required for each layer of extrusion, and the concentricity requirements are high when designing the molds. Otherwise, it will affect the eccentricity of the catheter, and only one set...

AI Technical Summary

Problems solved by technology

The process is complicated, and the catheter is easily delaminated due to other factors

Moreover, a set of molds is required for each layer of extrusion, and the concentricity requirements are high when designing the molds. Otherwise, it will affect the eccentricity of the catheter, and only one set of molds can be used on fixed products, which cannot be used universally. If it is easily deformed after repeated use and polishing , the product quality requirements cannot be met, causing it to be unusable and need to be remade, resulting in a relatively high cost

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