Molding process overview Injection molding is a cyclic process, and each cycle mainly includes:To get more news about 2k mold, you can visit asm-mold.com official website.

Quantitative feeding--melt plasticization--pressure injection--filling and cooling--opening and picking up parts. After the plastic part is taken out, the mold is closed again, and the next cycle is carried out. injection molding

Three major processes of plastic melt filling:

Filling stage: the cavity has just been filled.

Pressurization stage: The end of the cavity begins to bear pressure.

Compensation phase: The contraction phase causes feeding. Most of the residual stresses are generated at this stage. Injection time refers to the time it takes for the screw of the injection molding machine to move forward and push the plastic forward, that is, the time before the pressure maintenance stage. The period from the end of filling to the opening of the mold is called "post-filling time"; the holding time refers to the time it takes to maintain the screw at a certain pressure after filling until the rubber mouth cools and solidifies, which can make up for the material itself. of compressibility. Cooling time refers to the time required for the pressure to be released after the pressure is maintained until the finished product is solidified enough to be ejected-also known as the curing time (CureTime).

Why should plastic parts be designed with rounded corners?

Answer: The sharp corners of plastic parts will produce stress concentration during molding, and they are easy to crack when subjected to impact and vibration; plastic parts are designed with rounded corners, which not only avoids stress concentration, improves the strength of plastic parts, but also facilitates the filling of plastic parts. At the same time, the corresponding part of the mold cavity is also rounded, so that the mold will not crack due to stress concentration during quenching and use, and the firmness of the mold is improved.