Pre-expansion Technology of Copolymer Foam Pattern

Hu Guoliang Ye Shengping Huang Naiyu

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Pre-expansion Technology of Copolymer Foam Pattern
Issue 3, Pages: 11-12(2001)
Published： 2001 ，
DOI：

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[1]胡国良,叶升平,黄乃瑜.共聚物发泡模预发工艺研究[J].特种铸造及有色合金,2001(03):11-12+3-2.

Hu Guoliang Ye Shengping Huang Naiyu. Pre-expansion Technology of Copolymer Foam Pattern. [J]. Special Casting & Nonferrous Alloys (3):11-12(2001)
[1]胡国良,叶升平,黄乃瑜.共聚物发泡模预发工艺研究[J].特种铸造及有色合金,2001(03):11-12+3-2. DOI：

Hu Guoliang Ye Shengping Huang Naiyu. Pre-expansion Technology of Copolymer Foam Pattern. [J]. Special Casting & Nonferrous Alloys (3):11-12(2001) DOI：

摘要

针对国产蒸气间歇式预发机预发共聚物不易控制的问题

采用低压进气、保压预发及快速出料工艺

较好地预发出小粒径（0 .3～ 0 .4mm）的国产共聚物

使预发后珠粒的干态堆积密度达到 0 .0 2 0～ 0 .0 2 4g/cm3;同时

用扫描电镜观察预发珠粒外表及内部组织结构

为得出最佳的预发工艺提供参考依据

Abstract

Aimed to the fact that pre expanded copolymer beads have a lot of troubles with quality control in domestic discontinuous pre expander

the technology for low pressure steam inlet

pre expanded during holding pressure and rapid material outlet is developed. The fine pre expanded copolymer beads（0.3～0.4 mm） with dry stack density 0.020～0.024 g/cm 3 are achieved. Morever

the examination of the structure of external appearance and internal fracture for pre expanding beads by SEM could provide technological references for optimum pre expanding process.

关键词

共聚物消失模预发工艺

Keywords

CopolymerLost Foam PatternPre expansion Technology

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