英语翻译Simulation of the gas-assisted injection molding process using amid-plane model of a contained-channel partAbstractComputer-aided engineering (CAE) simulation and experimental studies have been carried out on the cavity filling and gas pa

英语翻译Simulation of the gas-assisted injection molding process using amid-plane model of a contained-channel partAbstractComputer-aided engineering (CAE) simulation and experimental studies have been carried out on the cavity filling and gas pa
英语翻译
Simulation of the gas-assisted injection molding process using a
mid-plane model of a contained-channel part
Abstract
Computer-aided engineering (CAE) simulation and experimental studies have been carried out on the cavity filling and gas packing steps in
the gas-assisted injection molding of a contained-channel part.A mid-plane model of the three-dimensional geometry of the mold cavity has
been proposed to be analyzed by the finite element method.The shot size,the distribution of the gas bubble and the residual wall thickness were
calculated using a commercial simulation software (Moldflow Plastics Insight Version 4.1).The outcomes predicted by simulation were compared
with the experimental results indicating the good predictive capability of the proposed model.
1.Introduction
Nowadays gas-assisted injection molding (GAIM) is not an
innovative technology for manufacturing hollowed plastic parts
with the first patent dating from 1978 [1].However,the establishment
as a common molding process has not yet been achieved
in the polymer industry.This is a result of some pitfalls in the
practical application of the GAIM process due to the inherent
gas instability that implies a complex relationship between the
parameters which control the gas flow and the quality of the
molded parts.Its higher limitation is the understanding of the
characteristics of the process,specially with respect to the typical
flow phenomenon.
There are four different processes to produce GAIM parts:
short-shot process,full-shot process,back-to-screw process and
mold with retractable cores [2].In thiswork,we have studied the
first process which is also called the standard GAIM.The shortshot
process can be described by a simple three-step process:
1.A short-shot of molten polymer initially fills 70–90% of the
mold cavity under the ram speed control of the injection
molding machine (Fig.1a).
2.After a short delay period,compressed nitrogen gas cores
out the molten polymer.The penetrating gas leaves behind
a polymer layer at the mold walls,attaining a molded part
with a polymer skin and an inner gas channel (Fig.1b).Gas
penetration which takes place at this step is denominated
primary gas penetration.This step finishes when the mold
cavity has been entirely filled (Fig.1c).
3.Gas is continuously injected to transmit the packing pressure
to the polymer.At this stage the polymer shrinkage is
counteracted by a growth of the gas core.The gas packing
pressure remains until all polymer material has solidified.
急,6月5号要交,翻译得好的我加分,

英语翻译Simulation of the gas-assisted injection molding process using amid-plane model of a contained-channel partAbstractComputer-aided engineering (CAE) simulation and experimental studies have been carried out on the cavity filling and gas pa
模拟气体辅助注射成型过程中使用
中期飞机模型的载道的一部分
摘要
电脑辅助工程（ CAE技术）模拟和实验研究已经开展了关于腔填充和气体包装的步骤
对气体辅助注射成型的载道的一部分.中期飞机模型的三维几何形状型腔已
有人建议进行分析的有限元方法.铅球大小,分布的气泡和剩余壁厚为
计算使用的是商业模拟软件（ Moldflow的塑料Insight的4.1版本） .所预测的结果进行了对比仿真
与实验结果表明了良好的预测能力,提出的模型.
1 .导言
如今气体辅助注射成型（气辅注塑）是不是一个
创新科技为制造业掏空塑料部件
与第一专利的历史可以追溯到1978年[ 1 ] .然而,建立
作为一个共同的成型过程尚未实现
在聚合物行业.这是由于在一些陷阱
实际应用过程中的气辅注塑的内在原因
天然气的不稳定,这意味着一个复杂的关系
参数控制的气体流量和质量
件.高时效的理解是
特征的过程,特别是对典型
流动的现象.
有四种不同的流程来生产气辅注塑部分：
短杆的过程中,充分拍摄过程中,回归进程和螺钉
模具伸缩核心[ 2 ] .在thiswork ,我们研究了
第一个进程也被称为标准的气辅注塑.该shortshot
过程可以说是通过一个简单的三个步骤：
1 .短杆最初熔融聚合物填充70-90 ％的
模具型腔的内存速度控制注射
成型机（图1A ）款.
2 .经过短暂的延迟期,压缩氮气内核
聚合物的熔融.穿透气留下
聚合物层在模具墙壁,实现成型部分
以聚合物皮肤和内部气道（图1b ）向.燃气
渗透其中发生在这一步是计价
主要气体渗透.这一步完成时,模具
腔已完全填补（图1C ）款.
3 .气体不断注入转交包装压力
以聚合物.在这一阶段的聚合物收缩
的增长所抵消的天然气核心.气体包装
压力仍然直到所有高分子材料已经凝固.