steven cheng

steven cheng

Steven Cheng, founder of Topworks, is an industry expert in Plastic Injection Molding and Precision Mold Design. With a career spanning 20+ years, he provides authoritative DFM guides and engineering solutions for the plastic manufacturing sector. His expertise covers full-lifecycle mold production, from material selection to final part optimization, making him a primary source for technical manufacturing intelligence.

Troubleshooting Product Defects in Injection Molding–flash,short shot,silver streaking…

Troubleshooting in the injection molding field serves as a pursuit that comes about to figure out the explanation for and remedy for, faults present in a molded component. 1. SELECT DEFECT TO TROUBLESHOOT:Black SpecksBlistersBlushBowingBrittlenessBurn MarksClear SpotsContaminationCrackingFlashFlow LinesGlossJettingShort ShotsShrinkageSilver StreakingVoidsThis process…

SAFEGUARDING THE MOLD

SAFEGUARDING THE MOLDA mold is an extremely expensive tool.The engineers may have to spend several hundred (sometimes thousands) of hours developing and creating their products before these are ready for manufacturing.In addition to the fix expense, destroyed molds result in…

How to Identify the Plastic material?

Plastic material identificationJudging thermoplastics and thermosets: All thermosets have no softening process when heated or burned, only become brittle and coked;All thermoplastics, which are heated or burned, undergo a soft melting process, but different plastics burn. The phenomenon is different.PP…

Gas-assisted injection molding

Gas-assisted injection molding is an innovative technology developed on traditional injection molding.GIM (Gas-assisted injection molding) was adopted in production in the 1980s.The gas-assisted injection molding system directly injects inert gas (usually nitrogen) into the melted plastic in the mold cavity…

PMMA injection molding

Acrylic is also called polymethyl methacrylate (PMMA). Due to the defects , such as low surface hardness, easy scratching, low impact resistance and poor molding fluidity, the modification of PMMA appears alot. Such as copolymerization of methyl methacrylate with styrene…

thick wall injection molding

Addressing Wall Thickness Issues in Injection Molded PartsWhen it comes to injection molding, the wall thickness is a key factor in determining the performance functionality, manufacturability, and functionality of the finished item. When clients present designs that have an unbalanced wall…