Holed continuously foaming extrusion mould head with exhausting function

Abstract

The invention discloses an opening-typed micelle continuous foaming pressing die head, comprising a die body which is provided with a die cavity and at least one gas release flow passage. One end of the die cavity forms a material inlet and the other end thereof forms a material outlet. The die cavity sequentially forms a diverging area, a pressure accumulation area, a pressure release area, an air release area and a shaping area from the material inlet to the material outlet. The gas release area is communicated with space outside the die body through the gas release flow passage. The foaming agent gas which is released in the foaming preparation process is rapidly exhausted outside the die head through the gas release flow passage, thus leading a foaming body to have uniform opening-typed micelle.

Description

Open Cell Continuous Foaming Extrusion Die with Venting Function technical field The invention relates to an open-cell continuous foaming and pressing (pressing) die, in particular to an open-cell continuous foaming and pressing die with exhaust function. Background technique The open-cell cellular foam made of polystyrene is generally used as the core material of Vacuum Insulation Panel (V.I.P. for short), and its thermal insulation effect is better than that of the current PU (polyurethane) material as the core material. Vacuum insulation board, and has recyclability. Therefore, open-cell cellular foams made of polystyrene are often used in thermal insulation devices such as refrigerators. Supercritical physical foaming continuous extrusion (supercritical physical foaming continuous extrusion) refers to the use of supercritical fluids such as refrigerant (HFC), nitrogen (N2), carbon dioxide (CO2), etc. liquid gas) as a foaming agent, and in an extruder (extruder), the...

AI Technical Summary

Problems solved by technology

However, removing the surface skin will increase the manufacturing cost of vacuum insulation panels

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