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Method for producing hollow foam molded article and hollow foam molded article

A foamed molded body and a manufacturing method technology, which can be applied to other household appliances, household appliances, applications, etc., can solve the problems of reduced fluid flow efficiency and increased resistance, and achieve the effect of improving flow efficiency

Active Publication Date: 2017-04-12
KYORAKU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the surface of the inside of the wall 2 is rough, the resistance to the air (fluid) circulating in the space (air flow path) 3 inside the wall 2 increases, so that Reduced flow efficiency

Method used

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  • Method for producing hollow foam molded article and hollow foam molded article
  • Method for producing hollow foam molded article and hollow foam molded article
  • Method for producing hollow foam molded article and hollow foam molded article

Examples

Experimental program
Comparison scheme
Effect test

no. 2 approach

[0129] Next, a second embodiment will be described.

[0130] In the first embodiment, compressed gas is blown into the inside of the foamed parison 13 from the blowing needle 14 in a state where the split molds 12a and 12b are closed (sealed), and the foamed parison 13 is Blow molding is performed by increasing the internal pressure above atmospheric pressure.

[0131] In the second embodiment, in a state where the split molds 12a, 12b are clamped (sealed), vacuum molding is performed by suction from the cavities 10a, 10b of the split molds 12a, 12b. In this case, the foamed parison 13 is adhered to the wall surfaces of the inner cavities 10a, 10b, and the hollow molded foam body 200 having the air passage 205 is molded.

[0132] Next, compressed gas such as air is blown into the inside of the foamed parison 13 from the blowing needle 14, and the compressed gas is blown out from the blowing needle 15 through the inside of the foamed parison 13, thereby blowing the hollow part w...

no. 3 approach

[0138] Next, a third embodiment will be described.

[0139] In the first embodiment and the second embodiment, the hollow foamed molded body 200 is molded using the foamed parison 13 . The third embodiment is characterized in that the hollow foamed molded body 200 is molded from a thermoplastic resin sheet. Below, refer to Figure 7 , the hollow foamed molded article 200 of this embodiment will be described.

[0140]

[0141] First, refer to Figure 7 , an example of the manufacturing method of the hollow foam molded body 200 of the present embodiment will be described. Figure 7 It is a figure which shows the structural example of the molding apparatus which molds the hollow foam molding 200 of this embodiment.

[0142] The molding device for molding the hollow foamed molded article 200 of this embodiment has an extruder 101 and a mold clamping device 102, and extrudes the molten thermoplastic resin sheets 18, 19 from the extruder 101 to the mold clamping device 102, A...

Embodiment 1

[0192] The hollow foamed molded body 200 of the final molded body was adjusted to have an expansion ratio of 3.0 times and a wall thickness of 3.0 mm to prepare a foamed parison and perform blow molding. Therefore, the slit width when forming the foamed parison was 0.6 mm. Next, compressed gas is blown into the blow-molded foamed parison to cool the hollow foamed molded body 200, and the final molded hollow foamed molded body 200 has an expansion ratio of 3.0 times and A hollow foam molded body 200 having a wall thickness of 3.0 mm. In Example 1, the pressure of the compressed gas blown inside is 1kg / cm 3 . In addition, in Example 1, there was only an injection port for blowing compressed gas into the foamed parison, and the compressed gas was blown out from the injection port (there was no air circulation).

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Abstract

The invention provides a manufacture method for a hollow foaming formed body for increasing flow efficiency of a fluid flowed in the hollow foaming formed body. The dies (12a, 12b) clamp foamex to form the hollow foaming formed body having an air venting path, the fluid of the hollow foaming formed body flows to the air venting path, and then the hollow foaming formed body is cooled.

Description

technical field [0001] The present invention relates to a method for producing a hollow foamed molded body. Background technique [0002] In recent years, automobiles are required to have high ceilings, wide seats, etc. to widen the interior space, and therefore, the ducts for automobiles are required to be compact and to allow the intended flow of air to flow smoothly. In addition, different duct shapes are required for each vehicle type. [0003] In order to meet the above-mentioned requirements, conventional automobile pipes use hollow molded bodies made of high-density polyethylene, polypropylene, or the like. Since the hollow molded body can be easily molded into various shapes and can easily ensure the desired air flow rate, it is suitable as a duct for automobiles. [0004] However, in recent years, the noise generated by the compressor of the air conditioner and the wind noise of the air passing through the duct leaking from the duct outlet have become a problem, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C49/06B29L23/00
Inventor 五十岚优小野寺正明大野庆词
Owner KYORAKU CO LTD
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