Forming device and preparation method for plastic foam product

A technology of plastic foam and molding device, which is applied to the field of molding device and preparation of plastic foam products, can solve the problems of limited application range, long production cycle, complicated process, etc., and achieves simple process flow, no waste of raw materials, fusion bonding solid effect

Inactive Publication Date: 2013-01-30
中广核俊尔(上海)新材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] To sum up, the improved method of molding and foaming engineering plastics is affected by chemical foaming agents, and its application range is limited. It is also necessary to solve the problems of material recycling, resource conservation and environmental protection.
The method of preparing foamed plastic products by injecting high-pressure gas to dissolve in thermoplastic resin, releasing pressure and foaming, also has the problems of complicated process, complicated equipment, long production cycle and high energy consumption.

Method used

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  • Forming device and preparation method for plastic foam product
  • Forming device and preparation method for plastic foam product
  • Forming device and preparation method for plastic foam product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Polystyrene foam beads (density 30Kg / m 3 , Wuxi Xingda) to fill the mold cavity of the above-mentioned molding device, put the mold into the steam generator, add 150ml of water to the water tank 4 of the steam generator, cover the cover plate 8, and place the molding mechanism on Between the upper hot pressing plate 1 and the lower hot pressing plate 9 of the hot press, the upper hot pressing plate 1 and the lower hot pressing plate 9 are heated and pressurized, so that the internal pressure of the steam generator reaches 0.15-0.2 MPa, and the pressure is released after 4 minutes of molding. Press, take out the mold, cool naturally to normal temperature, remove the mold, and obtain a polystyrene foam board.

[0050] The melt-bonded polystyrene foam beads in the polystyrene plastic foam board are not easy to scatter.

Embodiment 2

[0052] Polypropylene foam beads (density 30Kg / m 3 , Juner New Material Co., Ltd.) to fill the mold cavity of the above-mentioned molding device, put the mold into the steam generator, add 200ml of water to the water tank 4 of the steam generator, cover the cover plate 8, and mold The mechanism is placed between the upper hot pressing plate 1 and the lower hot pressing plate 9 of the hot pressing machine, and the upper hot pressing plate 1 and the lower hot pressing plate 9 are heated and pressurized to make the internal pressure of the steam generator reach 0.6-0.7MPa and form After 2 minutes, the pressure was released, the mold was taken out, cooled naturally to room temperature, and the mold was removed to obtain a polypropylene plastic foam board.

[0053] The melt-bonded polypropylene foam beads in the above-mentioned polypropylene plastic foam board are not easy to scatter.

Embodiment 3

[0055] Polylactic acid foam beads (density 120Kg / m 3 , Juner New Material Co., Ltd.) to fill the mold cavity of the above-mentioned molding device, put the mold into the steam generator, add 200ml of water to the water tank 4 of the steam generator, cover the cover plate 8, and mold The mechanism is placed between the upper hot pressing plate 1 and the lower hot pressing plate 9 of the hot pressing machine, and the upper hot pressing plate 1 and the lower hot pressing plate 9 are heated and pressurized to make the internal pressure of the steam generator reach 0.15-0.2 MPa, and the molding After 3 minutes to 4 minutes, release the pressure, take out the mold, cool naturally to room temperature, remove the mold, and obtain a polylactic acid plastic foam board.

[0056] The melt-bonded polylactic acid foam beads in the polylactic acid plastic foam board are not easy to scatter.

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PUM

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Abstract

The invention discloses a forming device and a preparation method for a plastic foam product. The forming device comprises an upper hot platen, a lower hot platen, and a forming mechanism between the upper hot platen and the lower hot platen, wherein the forming mechanism comprises a stream generator and a mold in the stream generator; the inside of the mold is provided with a mold cavity used for accommodating plastic foam; and the cavity wall of the mold cavity is provided with capillary through holes. The preparation method comprises the following steps of: making the stream generator havethe internal pressure of 0.1 to 1.6 MPa by using the forming device, forming for 1 to 15 min and releasing the pressure; and cooling and removing the mold to obtain the plastic foam product. The device has the advantages of simple structure and easy operation; and the preparation method has the advantages of simple operation and low cost, and is suitable for industrialized production.

Description

technical field [0001] The invention relates to the field of preparation of thermoplastic resin foam materials, in particular to a molding device for plastic foam products and a preparation method thereof. Background technique [0002] Plastic foam, also known as foam plastic, is a kind of polymer material formed by a large number of gas micropores dispersed in solid plastic. It has the characteristics of light weight, heat insulation, sound absorption, shock absorption, etc., and its dielectric properties are better than those of matrix resin. , is very versatile. The preparation process of plastic foam generally includes: ① introducing gas into liquid or molten plastic to generate micropores; ② increasing the micropores to a certain volume; ③ fixing the micropore structure by physical or chemical methods to obtain plastic foam. Plastic foam products include finished products made of plastic foam or finished products made of plastic as raw materials through foaming treatme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C44/02B29C44/34B29C44/58
Inventor 卢军刁雪峰吴智华祖勇
Owner 中广核俊尔(上海)新材料有限公司
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