Resin injection sleeve for RTM (Resin Transfer Molding) die

Abstract

The invention discloses a resin injection sleeve for an RTM (Resin Transfer Molding) die. The resin injection sleeve comprises a resin injection sleeve body, wherein a sealing groove which is used for containing an O ring is formed between the resin injection sleeve body and the die, counterbore holes are formed in the resin injection sleeve, the resin injection sleeve and the die are fastened in a manner that bolts pass through the counterbore holes, and the O ring is tightly pressed; pipe threads which are connected with external threads are formed on one end of the resin injection sleeve body, and a tapered inner wall is formed in the resin injection sleeve body. According to the resin injection sleeve, the sealing groove and the demolding angle of the resin injection sleeve are reasonably designed, so that the sealing requirements between the resin injection sleeve and the die as well as between the resin injection sleeve and an external pipeline of the die in a resin injection process can be satisfied, the integral sealing requirement of the die is effectively satisfied, and the requirements that residual resin in the resin injection sleeve can smoothly come off from the resin injection sleeve, the working efficiency is improved and the service life of the resin injection sleeve is prolonged are effectively satisfied by virtue of the reasonable tapered inner wall.

Description

technical field [0001] The invention relates to an RTM glue injection molding, in particular to an easy-to-clean glue injection auxiliary device. Background technique [0002] Resin Transfer Molding (RTM) process is generally used in the production of composite parts with complex profiles and high surface quality requirements. It is a low-cost liquid molding technology that does not use prepregs. Preformed blanks— Clamping—resin injection—curing—demolding and other five processes complete the production of parts. Because the RTM process has the characteristics of high production efficiency, high manufacturing precision, good surface quality, and the ability to directly form complex and shaped products, it has been more and more widely used in aerospace, rail transportation and other fields. [0003] In the process of injecting resin, the injection sleeve is an important channel connecting the mold and the injection device. A good seal between the injection sleeve and the mo...

AI Technical Summary

Problems solved by technology

[0003] In the process of injecting resin, the injection sleeve is an important channel connecting the mold and the injection device. A good seal between the injection sleeve and the mold is an important means to ensure the vacuum of the mold. There is residual resin in the inner hole of the injection sleeve. To clean the residual resin in the inner hole of the injection sleeve, tools such as drills are needed, which will scratch the surface of the inner hole of the injection sleeve, which will lead to frequent disassembly, replacement or even scrapping of the injection sleeve, reducing work efficiency. , increase the cost

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