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Method and apparatus for producing granular foam parts

A granular and foam technology, applied in the field of producing granular foam parts, can solve the problems of low production volume and high rejection rate

Active Publication Date: 2017-09-26
库尔特公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Considerably high reject rate and low throughput compared to the production of granular foam parts based on other materials

Method used

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  • Method and apparatus for producing granular foam parts
  • Method and apparatus for producing granular foam parts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0081] exist figure 1 A first embodiment of a device 1 for producing granular foam parts is shown in .

[0082] The device 1 comprises a material container 2 , a mold 3 and a pipe 4 leading from the material container 2 to the mold 3 .

[0083] Material container 2 is used to hold loose foam particles. The material container 2 has a base 5 and is connected in the area of ​​the base via a compressed air line 6 to a compressed air source 7 . The compressed air line 6 is connected to several nozzles (not shown) provided in the base 5, so that several air streams can be activated in the material container 2 and rotate the foam particles, thereby separating them.

[0084] In the region of the base 5 of the material container 2 , the delivery line 4 is connected to the material container 2 . Adjacent to the material container 2 in the delivery line 4 is a blowing nozzle 8 . The blowing nozzle 8 is connected to a compressed air source 7 via a further compressed air line 9 . The ...

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PUM

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Abstract

The invention relates to a method and a device for producing granular foam parts. The method comprises the steps of: - feeding foam particles from a material container to a mold by means of a pipe, and - while supplying heat, thermoplastically welding the foam particles in the mold into a granular foam part, wherein the foam particles to be fed Add steam.

Description

technical field [0001] The invention relates to a method and a device for producing granular foam parts. In particular, the present invention relates to a method and an apparatus for producing granular foam pieces from thermoplastic polyurethane-based expandable particles. Background technique [0002] Particle foam parts based on thermoplastic polyurethane are known from WO 94 / 20568. These granular foam pieces are made of expandable granular thermoplastic polyurethane. For molded part production, pre-expanded (if applicable) pressurized thermoplastic polyurethane pellets are placed in a heatable mold and heated sufficiently so that the pellets are welded together. Heating is done by applying steam. If desired, the pellets can be pressurized prior to molding production. After demoulding, the molding should be adjusted until it has reached a constant weight. Conditioning is performed at a temperature of 20 to 120°C. TPU pellets can be provided with e.g. butane or CO 2 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C44/44
CPCB29C44/3496B29C44/445B29K2075/00B29C44/3426B29K2105/04B29K2105/251
Inventor 哈拉尔德·佐默沃尔特·库尔茨诺贝特·罗伊贝尔
Owner 库尔特公司