An injection mold that allows air to be discharged after the mold is closed

Abstract

The invention discloses an injection mold in which the air can be discharged after the molds are closed. Its structure includes a top seat, an upper mold, an exhaust mechanism, a lower mold, a connecting block, and a base. The top of the upper mold is connected with the top seat. The upper mold is connected with the lower mold through the exhaust mechanism. Compared with the prior art, the beneficial effect of the present invention is: based on Lenz's law, rigid collision can be prevented when the molds are closed, and most of the air in the mold cavity can be discharged by slow falling. It can be discharged in time. After the mold is closed, based on the principle of magnetic attraction, the magnetic force is used as the power source, and the characteristics of the clockwork can be used to simultaneously make multiple sets of air extraction groups perform air extraction simultaneously, which improves the efficiency of air extraction. Using planetary gears Set three times the number of revolutions, increase the amount of air extraction, so that the air in the mold cavity can be fully exhausted, avoid mixing the air with the melt, prevent the generation of air bubbles, so that the mechanical strength, weight, and aesthetics of the plastic parts will not be affected, and the quality of the plastic parts will not be affected. It can be guaranteed that the extracted gas can cool the plastic part after the mold is opened, which is convenient for the demoulding of the plastic part.

Description

technical field [0001] The invention relates to the technical field of molds, in particular to an injection mold from which air can be discharged after mold closing. Background technique [0002] Due to the advantages of light weight, good toughness, easy molding and low cost, etc., transparent plastics are more and more used to replace glass in modern industrial and daily products. Machine high-pressure injection into the cavity of the injection mold, obtained after cooling and solidification. [0003] When the upper and lower molds are closed, due to the tight fit of the molds, it is difficult to discharge the internal air after the molds are closed, which will cause the air to mix with the injected melt and form air bubbles. The air bubbles will not only weaken the mechanical strength of the plastic parts, but also reduce the pressure of the plastic parts. The weight of the parts makes the quality of the plastic parts not guaranteed, and the bubbles of the transparent pl...

AI Technical Summary

Problems solved by technology

[0003] When the upper and lower molds are closed, due to the tight fit of the molds, it is difficult to discharge the internal air after the molds are closed, which will cause the air to mix with the injected melt and form air bubbles. The air bubbles will not only weaken the mechanical strength of the plastic parts, but also reduce the pressure of the plastic parts. The weight of the plastic parts makes the quality of the plastic parts not guaranteed, and the bubbles of the transparent plastic parts are obvious, which affects the aesthetics of the transparent plastic parts

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