Desiccant cap production process

Mar 11 , 2020

As a component of medicinal plastic bottles in pharmaceutical packaging, the production and processing of desiccant caps are similar to the requirements of the bottle body, except that the main raw material of the bottle body is blow molding grade, while the main raw material of the bottle cap is injection molding grade.

desiccant cap

The pharmaceutical bottle cap production process is:

First, feeding and batching are mainly conveyed to the hopper of the injection molding machine through pipes. After the machine is turned on, the material in the hopper enters the person's barrel to complete the process of feeding the machine.

Secondly, plasticization is a process in which the plastic batch material that enters the barrel from the hopper is heated in the barrel to reach a flowing state and has good plasticity. The requirement is that the plastic reaches the specified molding temperature before entering the mold cavity, and a sufficient amount of molten plastic is provided within the specified time.

Third, the first injection is to inject the well-plasticized melt into the mold under the pressure of the screw (injection process). When the melt is injected into the mold cavity, it passes through the nozzle, the main (sub) runner, and the gate. The resistance is very high. It has a large injection pressure loss of 30% -70%, so the process requires a sufficient injection pressure to ensure complete mold filling. This is followed by the molding stage, which consists of four steps: disposable mold, compaction, reverse flow and gate curing. The plastic melt injected into the mold cavity is cooled and shaped into a plastic cover.

Fourth, cooling and demoulding. Mainly refers to the stage from when the plastic in the gate is completely frozen to when the lid is released from the mold. Demoulding can be divided into two types: strong demolding and spin-off.

It is necessary to grasp the various production links and avoid problems before they can produce medicinal bottle caps that the customers of high quality can trust.