Molds flash

Processing PC resins by extmsion or injection-molding methods requires melt temperatures of 290—320°C. High melt viscosity at low shear rates prevents mold flash and drool. At injection shear rates, apparent viscosities decrease, and easy melt flow allows manufacture of large, complex parts. 

Also called regrind and reclaiming. Most processing plants have been reclaiming/ recycling reprocessable TP materials such as molding flash, rejected products, blown... 

Buffing and trimming off mold flash from the tire. 

During the heat curing cycle, the low viscosity of TSs tends to cause flash, particularly in CM. Basically there is no flash with TPs, as viscosity is not so low, and closed molds are used. The inherently more costly removal of flash from the parting line and holes with CM, as well as slower molding cycles, difficulty in molding side holes or sections, and problems in molding flash-free metal inserts, have all helped to reduce the use of CM in favor of closed-mold TM and IM. 

PPS/PEEK/PMP, GF, organosilane Mold release and reduced molding flash Hindi etal. 1994... 

A considerable amount of machining is done with thermosets because, with the exception of a couple of methods, the mechanical removal of molding flash is necessary in thermoset processes. Drilling holes and cutting openings is also commonplace in some processes because it is difficult, bordering on impossible, to mold them in for many designs. 

Variations in PWB thickness, variability in the molded cross-section of the connector body, or molding flash can... 

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