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

A material processing and spray-free technology, which is applied in the field of spray-free material processing and molding, can solve the problem that the spray-free material flow marks or water marks cannot be completely eradicated, and achieve the effects of increasing the curing time of the arrangement, delaying the curing speed, and reducing the viscosity

Inactive Publication Date: 2020-08-28
深圳市同益实业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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

Examples

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Embodiment 1

[0048] A method for eradicating flow marks and water inclusion marks in the processing and molding of spray-free materials based on the system, which includes the steps of:

[0049] Adding the initial spray-free material to the injection molding machine for melting treatment to obtain a fluid spray-free material;

[0050] Before the fluid spray-free material is injected into the mould, the high-frequency alternating current generating device outputs a 40kHZ high-frequency alternating current to the electromagnetic induction coil, thereby electromagnetically heating the mould, so that the mould is heated at 25°C / s Speed ​​up the temperature, when the temperature of the mold is heated to be greater than or equal to the melting temperature of the resin in the spray-free material, then turn off the high-frequency alternating current generator, and then send a cooling command to the mold temperature machine, and the mold temperature machine according to The cooling instructions coo...

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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...

Claims

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Application Information

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IPC IPC(8): B29C45/73B29C45/78
CPCB29C45/0025B29C45/73B29C45/78B29C2045/7356B29C2945/76531
Inventor 李玉民周郑彬王全兵叶耕宏张振忠王秀军
Owner 深圳市同益实业股份有限公司
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