Verfahren zur Physikalischen Schauminjektion

Details

Veröffentlichungs-Nr.

EP4729266

Anmeldetag

30. November 2022

Veröffentlichung

22. April 2026

Rechtsraum

EP

IPC

B29C44/60

Abstract

System and method for physical foaming injection suitable for manufacturing low-density member are provided. The method for physical foaming injection includes i) heating an inside of a barrel that is elongated in one direction; ii) providing resin beads in the barrel; iii) manufacturing a melt by rotating and heating the resin beads with a first screw provided in the barrel; iv) directly providing a gas for physical foaming in the barrel along a transferring direction of the resin beads by spacing the resin beads; v) providing a gas for physical foaming in the barrel and forming a supercritical fluid by agitating a second screw placed in front of a first screw, the first screw to be spaced apart the second screw along a transferring direction; vi) providing a mixture in which the supercritical fluid is incorporated into the melt while the melt passes through the supercritical fluid; vii) pressurizing a cavity formed by the combination of a upper mold part and a lower mold part by injecting gas into the cavity; viii) foaming the mixture in the cavity while injecting the mixture into the cavity; ix) reducing pressure of the cavity in multiple stages after the injection of the mixture, and x) separating the upper mold part and the lower mold part from each other to remove the foamed member with a low density of 0.1 g/cc to 0.5 g/cc.

Anmelder

Firma

Comtech Chemical Co., Ltd.

Land

🇰🇷 Südkorea

Fachgebiete