Posts tagged "plastic molding"

Because the hot runner mold has high requirements for plastics, the hot runner must be selected according to the specific plastics and their applications (the replacement of colored plastics is difficult and time-consuming). Different nozzles shall be used according to the type of plastic, and the plastic used shall meet the following conditions: ① Plastic has good thermal stability. Plastic has a wide melting temperature range, small viscosity change, and is insensitive to temperature change.

Flap edge, also known as flash, overflow, overflow, etc., mostly occurs in the opening and closing position of the mold, such as the parting surface of the mold, the sliding part of the slider, the gap of the insert, the hole of the ejector pin, etc. If the overflow is not solved in time, it will be further expanded, resulting in local collapse of the impression die, causing permanent damage. The flapping edge of the