Water-assisted reverse extrusion injection molding method and water-assisted injection molding machine

An injection molding machine and injection molding technology, which is applied in the field of water-assisted reverse extrusion injection molding method and water-assisted injection molding machine, can solve the problems of unstable pressure change and inconsistent product wall thickness, and achieve the effects of constant pressure, consistent wall thickness and constant acceleration

Active Publication Date: 2022-07-29
广东伊之密精密注压科技有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the plastic melt is squeezed back into the hot runner of the mold and the material pipe of the machine, the pressure change is unstable, resulting in inconsistent wall thickness of the product

Method used

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  • Water-assisted reverse extrusion injection molding method and water-assisted injection molding machine
  • Water-assisted reverse extrusion injection molding method and water-assisted injection molding machine

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Embodiment Construction

[0048] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0049] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relationship between various components under a certain posture (as shown in the accompanying drawings). The relative positional relationship, the movement situation, etc., if the specific posture changes, the directional indication also changes accordingly....

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Abstract

The invention discloses a water-assisted reverse extrusion injection molding method and a water-assisted injection molding machine, wherein the fluid injection device is communicated with the mold, and is characterized in that the water-assisted reverse extrusion injection molding method comprises the following steps: controlling the fluid injection device to inject The fluid is injected into the mold to push the unsolidified plastic melt back into the barrel; the fluid pressure value of the fluid, the current pressure value of the barrel, and the movement of the injection molding assembly within the barrel are obtained The displacement of the injection molding component is adjusted according to the fluid pressure value, the current pressure value of the barrel and the displacement. The present invention adjusts the current pressure value of the plastic melt squeezed back in the barrel in real time according to the pressure value of the fluid, the current pressure value of the plastic melt squeezed back in the barrel, and the displacement of the injection molding component moving in the barrel, so as to ensure The constant acceleration of the plastic melt retraction ensures a consistent wall thickness in the final product.

Description

technical field [0001] The invention relates to the field of water-assisted injection molding, in particular to a water-assisted reverse extrusion injection molding method and a water-assisted injection molding machine. Background technique [0002] With the global trend of replacing steel with plastic, more and more parts are replaced by plastic in all walks of life, and the water-assisted process can form holes in plastic products, further reducing the weight of the product and reducing the internal stress of the product. [0003] Through exchanges with foreign advanced technologies, the melt reverse extrusion process of water-assisted technology is also gradually being promoted. Compared with the traditional water-assisted injection molding process, this process will extrude the plastic melt squeezed by water back into the mold during water injection. In the hot runner and the material pipe of the machine, it directly participates in the next injection. The mold directly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/03B29C45/76B29C45/77B29C45/53
CPCB29C2045/1707B29C45/1711B29C45/77B29C2945/76297B29C2945/76301B29C2945/76287B29C2945/76381B29C2945/76498B29C2945/76933B29C2945/76939B29C2945/76943B29C2945/76595
Inventor 齐明超侯永平张敏邝添智
Owner 广东伊之密精密注压科技有限公司
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