For large injection-molded parts, a servo-driven valve gate system can improve surface finish and part performance. The art of sequential molding has proven to be a beneficial process in many markets. Automotive suppliers are one of the largest users of this technology, especially for the production of plastic parts with Class A surface finishes. Sequential [...]
Properly improve injection and dwell pressure as well as the injection rate to increase melt's compression tightness; prolong time of injection and dwell( the freezing of gate should not occur too early) to realize sufficient shrinkage compensation; properly reduce melt temperature and properly raise mold temperature( whereas cooling should be reinforce at parts with thick [...]
The injection products should not be too thick and when necessary the stiffening rid can be added to reduce wall thickness; the wall thickness must be kept as uniform as possible and the shape and structure should be simple and symmetric; […]
Both the shrink mark and shrinkage porosity are defects of injection products due to the molding shrinkage at thick walls where no sufficient follow-up compensation is made. During the injection process, the surface layer of products often condenses first, followed by the center layer, which will cause sinking on the surface of parts with thick [...]
as an injection molding engineer, he should be very familiar with welding mark, the thread mark formed at the front confluence of two or more melt flows in the cavity is called welding mark or welding line. […]
In actual engineering practice, commonly-used methods for treating welding mark include: […]
In the molding industry, Mould is one of the essential production tools, but how to evaluate a set of mould, The heat exchange efficiency is an important parameter, In part two of our three-part sub-series on mold water cooling systems, we review water quality and its impact on mold performance. […]
In today’s mold design process, CAE technology is more and more important, before that, Our designers cannot ensure that their design is completely correct, Process simulation is the core of CAE technology. […]
Now we have understood the importance of mold design review, do you know how to start? Generally, The mold designer then uses the information gathered for him from the previous steps to generate a mold design and submit a tool assembly drawing to the mold buyer for approval. The next step is mold design review, [...]
There are many many sharp corners in every plastic product, what does a sharp corner mean? Sharp corners greatly increase the stress concentration during injection molding.it could lead to failure of plastic parts, especially for the high amount of stress concentration. So generally, as a mold or plastic produce designer, when he or she meet [...]