Method for controlling microscopic bubble nucleation in fluid polymer material production and its apparatus

Abstract

A method for controlling microscopic bubble nucleation in fluid polymer material production and its apparatus that utilizes a gas pipe disposed in the conveyance screw shaft of a conventional injection or extraction forming mechanism and, furthermore, a microbubble generating component (such as a microscopic perforation vented metal head or a microscopic perforation ceramic head, etc.) installed at the front extremity of the conveyance screw shaft. At the rear extremity of the gas pipe, a pressurization pump or a high pressure gas storage tank is admitted from an air intake opening, enabling the gas to be indirectly heated by an electric heater on the materials pipe. The high temperature gas is thereafter outputted from the microscopic perforations of the microbubble generating component such that high temperature microscopic bubbles are directly admitted into the section of liquid polymer material which is then uniformly amalgamated by the conveyance screw shaft and then deposited into a forming die. As a result, high pressure gas conveyance or termination is controllable; control is afforded as to whether each section of liquid polymer material is microbubble nucleated and amalgamated. The present invention thereby provides a microbubble nucleation production method in which the non-bubble nucleated is at the surface and the bubble nucleated is at the interior section when the liquid polymer material is poured into a forming die.

Description

technical field [0001] The invention relates to a method and device for controlling the generation of microbubble nuclei in fluid polymer materials. A heater is installed outside the conveying screw to melt the polymer material in the material tube, and a heater is installed inside the conveying screw. A gas delivery tube, connected to the micro-bubble generation component at the front end of the delivery screw, controls the formation of bubble nuclei or No bubble nuclei. Background technique [0002] Generally, the polymer material used in injection or extrusion molding machines is melted into a fluid, injected into the polymer material with a physical foaming agent, and stirred to make the polymer contain a mixture of foaming agent cells. Then the mixture is injected into the forming mold to solidify, so that the pressure drop in the mixture promotes the growth of the unit cell in the polymer. However, the polymer material produces a chemical reaction to form a blowing a...

AI Technical Summary

Problems solved by technology

[0006] 3. It is not easy to control the separation of the non-nucleating part and the nucleating part of the fluid polymer material heated and melted in the material tube, and it is quite difficult to control the required foaming agent ratio and the connection of the non-nuclear part. often unstable

[0007] The injection port of the foaming agent must be equipped with a check valve to prevent the backflow of the polymer material, but this device will increase the cost and failure rate of the equipment

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