Problems and improvement measures of injection molding

Whether a set of injection molds are successfully opened depends mainly on whether the injection molds have a lot of problems? A successful set of molds can be reflected in product appearance, assembly, and production efficiency. Then, relatively speaking, the more injection mold molding problems, the greater the possibility that the mold is not opened well. Then let’s take a look, what are the problems that are easy to occur in injection mold molding?

The most common problems in injection mold molding are batch front, multi-glue, encapsulation, shrinkage, cracking, insufficient filling, wrinkle and pitting, overflow, weld mark, warpage, deformation and other problems. The machine is improved by adjusting the machine, and it can also be controlled by several points during the design of the injection mold:

1. The wall thickness should be as uniform as possible, and the draft angle should be large enough;

2. The transition part should be gradually and smoothly transitioned to prevent sharp corners. Sharp edges, especially pc products must not have gaps;

3. The gate runner should be as wide and thick as possible. The gate position should be set according to the shrinking and condensing process. If necessary, a cold material well should be added;

4. The surface of the mold should be smooth and the roughness is low, preferably less than 0.8MM;

5. Exhaust holes. The tank must be sufficient to exhaust air and melt gas in a timely manner;

6. In addition to pet, the wall thickness should not be too thin, generally not less than lmm.

In the mold design, in order to prevent poor backflow during injection molding, or uneven cooling to cause poor injection molding, surface defects and deterioration, do the above points to effectively avoid the occurrence of bad problems.