Research On Structure Optimization Of The High-gloss Parts By Injection Molding

Rapid Heat Cycle Molding (RHCM) is a new type of injection molding technology in recent years. The products which obtained by this method have lots of advantages,such as eliminating dents, weld mark and silver mark,etc.Meanwhile,The appearance of molding products can get high gloss.Eliminating the need for secondary processing and reducing environmental pollution caused by spraying.The high-quality surface of the RHCM need for the better structural design,unreasonable design may cause sink marks, warpage and other defects.According to the process characteristics of the RHCM and the requirements of high-quality appearance,The surface index, volume shrinkage and warpage which were influenced by the main wall thickness and ultra-thin wall thickness of the high-light parts were researched and compared with the general injection molding.The design criteria of the RHCM parts main wall thickness were obtained.At the same time, on the basis of general injection molding structural design,the position and the dimension design of the back strengthen structure, hole, fillet, stripping slope and inserts of the RHCM parts were researched and obtained.The ruler will give a direction on structure design of the high-gloss surface quality plastic parts.Finally,Based on the example of a high-gloss LCD monitor stand,according to Moldflow,Taguchi method,data processing combined with the structural design rulers of RHCM.The apparent quality problems were solved by using Improving the structure and optimizing the process parameters.The actual result showed that it was feasible.The result shows the structural design rulers of RHCM are reasonable and practical.