Nowadays, with the development of the world economy, the number of high-precision plastic molds is also increasing, and users are increasingly demanding the use of plastic caps molds.In this article, the plastic caps mold design, process method and common quality issues of plastic bottle caps are briefly described, now, we talking about the reasons of the lack of material caused by the plastic caps mold.

  The lack of material is generally in the plastic processing process, due to the mold cavity filled with dissatisfaction, resulting in the shape of the part is inconsistent with the design of the phenomenon is called lack of material.

  Generally, due to the unobstructed discharge of the interior of the plastic caps mold, the air accumulated in the cavity cannot be discharged, resulting in insufficient plastic filling amount, resulting in shortage of material, and the measures taken are to reduce the filling speed of the plastic or add corresponding vent holes to the mold.