RTM (resin transfer moulding) mould with resin intercepting outlet

Abstract

The invention provides an RTM (resin transfer moulding) mould with a resin intercepting outlet. The RTM mould comprises an upper mould and a lower mould, wherein the lower mould is provided with a glue filling hole and a plurality of glue outlets, wherein the glue outlets are provided with metallic screens. Compared with the prior art, the RTM mould with the resin intercepting outlet provided by the invention has the advantages that the cross area of each single channel is reduced under the condition that the total area of the glue outlets is not reduced through the metallic screens; air in a mould cavity is discharged out from the mould through the metallic screens because of resin surface tension in the vacuum pumping state, so that less resin flows out, and the resin loss in manufacture is effectively reduced; in addition, even through a bit of resin flows in the metallic screens, a resin nail formed by solidifying the resin is also small, is likely to break and does not influence the demoulding property, and thus the glue outlets can be set flexibly and efficiently.

Description

technical field [0001] The invention relates to an RTM mold provided with a resin cut-off outlet. Background technique [0002] Composite material RTM, that is, resin transfer molding, Resin Transfer Moulding, molding process, is to use upper and lower closed molds, first put the fiber fabric blank into the mold cavity, and then inject the resin through equipment pressurization, soak the fiber fabric blank, and then solidify Forming method. Because of its high production efficiency and stable product quality, the RTM process has been more and more widely used in the automotive, aviation and military industries. [0003] In the RTM mold, one or more glue outlets will be set according to the shape and size of the product. The number and position of the glue outlet will directly affect the quality of the product. The traditional glue outlet is just a circular tube-shaped channel, and the resin will flow out of this channel when the glue is injected. But this kind ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an RTM mold with a resin cut-off outlet to solve the problem in the prior art that when injecting glue, in order to clear the air bubbles in the mold cavity, it needs to be opened after the resin fills the mold cavity. The outlet valve allows the resin to entrain the remaining air bubbles to continue to flow out, which will cause waste of resin. If the outlet valve is closed too early, the air bubbles will remain in the product and cause product defects; in addition, after the resin in the glue outlet is cured, it will Form a resin nail, if the resin nail sticks to the product, it will cause difficulty in demoulding, and in severe cases, the product will be damaged due to demoulding

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