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Device for preparing supercritical foaming material and foaming material preparation method

A foaming material and supercritical technology, applied in the field of foaming materials, can solve problems such as screw damage, high screw strength requirements, and difficulty in achieving a balance in the quality of foaming materials, so as to improve the uniformity of distribution, reduce pressure and damage , to achieve the effect of quality

Pending Publication Date: 2021-12-03
FUJIAN HONGXING ERKE SPORTING GOODS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the process of preparing TPU foaming materials, the continuous extrusion foaming efficiency is high and suitable for industrial mass production, but the supercritical fluid needs to be released through the screw to achieve a good penetration effect. In this way, the supercritical fluid state can be maintained The required high pressure will easily cause greater damage to the screw, so the strength of the screw is required to be higher
And because the foaming material is always in a molten state during the continuous extrusion process, it is difficult to adjust and control process parameters such as supercritical carbon dioxide pressure, temperature, and pressure relief rate during the foaming process, which in turn leads to the failure of the finished foamed material The quality is difficult to achieve balance

Method used

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  • Device for preparing supercritical foaming material and foaming material preparation method
  • Device for preparing supercritical foaming material and foaming material preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0048] Such as figure 1 and 2 As shown, a device for preparing supercritical foaming materials, including a kettle body 1, a supercritical fluid circulation assembly 2, a high-pressure filling head 3 and a foaming mold 4;

[0049] The interior of the kettle body 1 is sequentially provided with a permeation chamber 11, a pressurization chamber 12 and a mixing extrusion chamber 13 from top to bottom;

[0050] The permeation chamber 11 is provided with a first air inlet 111 for introducing supercritical fluid and a first air outlet 112 for discharging supercritical fluid, a heating rod is arranged in the pressurization chamber 12, and the mixing A screw extrusion assembly 131 is provided in the extrusion chamber 13, and the screw extrusion assembly 131 includes a main shaft, blades arranged around the main shaft, and a motor for driving the screw;

[0051] The supercritical fluid circulation component 2 communicates with the first air inlet 111 and the first gas outlet 112 of t...

Embodiment 2

[0061] A kind of method that uses the device for preparing supercritical foam material in above-mentioned embodiment one to prepare supercritical foam material, comprises the steps:

[0062] Step 1: Introduce carbon dioxide into the kettle body 1, the high-pressure filling head 3 and the foaming mold 4 to clean and discharge the air, then add TPU particles into the permeation cavity 11, and heat the whole kettle body 1 to make the kettle body 1 The temperature is greater than the critical temperature of supercritical carbon dioxide fluid and less than the melting temperature of TPU particles

[0063] Step 2, passing the pressurized supercritical carbon dioxide fluid into the permeation chamber 11 through the supercritical fluid circulation component 2 and continuing to circulate for a certain period of time;

[0064] Step 3, stop feeding the supercritical carbon dioxide fluid into the permeation chamber 11 and make the TPU particles in the permeation chamber 11 fall into the p...

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Abstract

The invention relates to a device for preparing a supercritical foaming material and a foaming material preparation method. The device for preparing the supercritical foaming material comprises a kettle body, a supercritical fluid circulation assembly, a high-pressure filling head and a foaming mold; a permeation cavity, a pressurization cavity and a mixing extrusion cavity are sequentially formed in the kettle body from top to bottom; and a first air inlet used for introducing supercritical fluid and a first air outlet used for discharging the supercritical fluid are formed in the permeation cavity, a heating element is arranged in the pressurization cavity, and a screw extrusion assembly is arranged in the mixing extrusion cavity. According to the device for preparing the supercritical foaming material, the permeation process and the extrusion process of the supercritical fluid of the foaming material are separated, and the pressure intensity and the temperature of the supercritical fluid can be controlled in the permeation process; and meanwhile, the foaming material needs to be melted in the pressurization cavity after the permeation process, and the distribution uniformity degree of the supercritical fluid in the foaming material is further improved.

Description

technical field [0001] The invention relates to the technical field of foaming materials, in particular to a device for preparing supercritical foaming materials and a preparation method for foaming materials. Background technique [0002] Supercritical foam molding is a physical foam molding technology, but also a microcellular foam molding technology, it is in the injection molding, extrusion and blow molding process, the supercritical state of carbon dioxide or nitrogen and other The gas is injected into a special plasticizing device, and the gas and the molten raw material are fully and uniformly mixed / diffused to form a single-phase mixed sol, and then the sol is introduced into the mold cavity or extrusion die, so that the sol produces a large pressure drop, As a result, the gas is precipitated to form a large number of bubble nuclei; during the subsequent cooling and molding process, the bubble nuclei inside the sol continue to grow and form, and finally a microcellul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C44/34B29C44/42B29K75/00
CPCB29C44/34B29C44/42B29C44/3415B29C44/3442B29K2075/00
Inventor 吴荣照林秀欣袁雄文文明
Owner FUJIAN HONGXING ERKE SPORTING GOODS CO LTD