System and method for eradicating flow marks and water inclusion marks of spraying-free material during processing and forming

Abstract

The invention discloses a system and method for eradicating flow marks and water inclusion marks of a spraying-free material during processing and forming, wherein the system comprises a mold, an electromagnetic induction coil and a high-frequency alternating current generation device; the mold is used for injection molding of the spraying-free material; the electromagnetic induction coil is disposed on the surface of the mold; and the high-frequency alternating current generation device is electrically connected with the electromagnetic induction coil. According to the system and the method in the invention, the mold is heated in an electromagnetic heating manner, so that the mold is rapidly heated to the temperature close to or higher than the melting temperature of resin in the spraying-free material; on the one hand, the curing speed of the fluid spraying-free material in a mold cavity is reduced; on the other hand, the viscosity of the fluid spraying-free material in the mold cavity is reduced; the shear strength of powder in the fluid spraying-free material in the mold cavity is greatly reduced; the arrangement and curing time of the powder in the cavity is prolonged; the arrangement intensity of the powder is obviously reduced; and the problems of the flow marks and the water inclusion marks of the spraying-free material during processing and forming can be completely eradicated.

Description

technical field [0001] The invention relates to the field of processing and molding of spray-free materials, in particular to a system and method for eradicating flow marks and water inclusion marks in the processing and molding of spray-free materials. Background technique [0002] The existing spray-free materials are prone to the problem of flow marks or water marks during injection molding. This is because when the flow direction of molten plastic mixed with metal powder or pearl powder changes suddenly in the mold cavity, it will cause metal powder or The pearlescent powder changes in the arrangement direction, destroying the original parallel arrangement, and the relatively cold mold wall quickly solidifies this change, and then forms the symptoms of water traps or flow marks on the surface of the product. [0003] The existing technology usually uses the steam quenching and heating process to improve the water mark or flow mark problem. However, due to the steam quenc...

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Problems solved by technology

[0005] In view of the above deficiencies in the prior art, the purpose of the present invention is to provide a system and method for eradicating flow marks and water inclusions in the processing and molding of spray-free materials, aiming to solve the problem that the prior art cannot completely eradicate the processing and forming of spray-free materials. The problem of flow marks or water traps

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