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Water assistant jetting and forming method

An injection molding, water-assisted technology, applied in the field of water-assisted injection molding, can solve the problems such as the inability to obtain nitrogen at will, the high cost of manufacturing plastic products, and the uneven thickness of plastic products, and achieve the effect of shortening the curing and molding time.

Inactive Publication Date: 2005-01-19
CHUAN LIH FA MACHINERY WORKS CO LTD
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Problems solved by technology

[0002] If the known injection molding method wants to manufacture a plastic product with a hollow part, it is realized by injecting nitrogen into the plastic raw material in the mold cavity; but nitrogen is compressible, which often causes uneven thickness of the plastic product, and nitrogen Unable to obtain freely, resulting in high manufacturing cost of plastic products with hollow parts

Method used

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  • Water assistant jetting and forming method
  • Water assistant jetting and forming method
  • Water assistant jetting and forming method

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Embodiment Construction

[0029] see figure 1 As shown, a water-assisted injection molding method of the present invention is to close the mold A, inject the plastic material that will not fill the mold cavity into the interior of the mold B, introduce water flow C into the mold cavity through the water auxiliary device, and drain the water auxiliary device. It is realized by manufacturing procedures such as opening D, the water needle of the water auxiliary device exiting the mold cavity E, blowing gas F into the mold cavity through the water auxiliary device, storing and discharging water G, closing the drain valve of the water auxiliary device H, and opening the mold I;

[0030] Please refer to Figure 5 , wherein the mold A is closed: the movable template 2 leans against the fixed template 3 to close the mold 4;

[0031] Inject the plastic material that will not fill the mold cavity into the mold B: After the signal that the mold closing is completed is confirmed, the plastic material that melts a...

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Abstract

The invention relates to a water-assisted injection molding method which includes the following steps: A. closing the mold, B. injecting plastic raw material into the mold, C. guiding water into the mold cavity by water-assisted device, D. opening the drainage valve of water-assisted device, E. the water needle of water-assisted device exiting from mold cavity, F. blowing gas into the mold cavity by water-assisted device, G. storing drainage water, H. closing the drainage valve of water-assisted device, I. opening the mold. By the sequent steps of inside jetting water, blowing, pushing liquid and draining, the plastic product with hollow part can be obtained.

Description

technical field [0001] The invention relates to a plastic hollow molding method, in particular to a water-assisted injection molding method. Background technique [0002] If the known injection molding method wants to manufacture a plastic product with a hollow part, it is realized by injecting nitrogen into the plastic raw material in the mold cavity; but nitrogen is compressible, which often causes uneven thickness of the plastic product, and nitrogen It cannot be obtained freely, resulting in high manufacturing cost of the plastic product with the hollow portion. Contents of the invention [0003] In order to solve the above-mentioned technical problems, the present invention proposes a water-assisted injection molding method, which uses a water-assisted device to sequentially perform internal water injection, blowing and pushing the water to discharge the plastic raw materials in the cavity. A plastic finished product with a hollow portion, an average thickness, and r...

Claims

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Application Information

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IPC IPC(8): B29C45/03B29C45/70
Inventor 林荣腾
Owner CHUAN LIH FA MACHINERY WORKS CO LTD
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