Detail Basics About Injection Blow Molding

Injection blow molding is widely known as manufacturing process. This process is able to combine the accuracy of the injection molding for minimum waste with rapid blow molding process. It can work along with plastic. It specializes in creating hallow shapes such as bottles. Since the blow molding methods are less expensive than manufacturing process, these methods are commonly used to fabricate larger container by using extrusion blow. The output of this technique commonly has no seams with glass clear.

The process of injection blow molding involves three phases including material injection to the preformed mold, blowing, and also ejection of the final product from the machine. The machine configuration which is commonly used is blow molding machine with thee stages. This machine is able to rotate 120 inches at each phase of the molding process.

Injection phase begins when the molten glass or plastic is injected to the preformed mold over the core pin. It is able to form the interior of parison and also finishes the neck interior. Then, the parison is separated for the mold and then inserted to the blow mold. In the blow mold, the parison will be inflated by the pressurized air. Then, the product will be forced out of the machine after the cooling period. The last step is to test the product whether it leaks or not and then move it to another station for finishing or labeling.

In designing the model of the product you are going to fabricate, you have to consider some important issues. You have to consider selecting the right thermoplastic resin you are going to use for the application on your product, designing the geometry of the mold including the material shrinkage during the cooling phase, and also calculating the proper amount of the material injected. Another important thin you have to take into account is about choosing the appropriate pressure needed to inflate the parison. While designing, you have to consider the tolerances in the core rod and the preformed mold so that the core rot can sit perfectly on the mold center and the parison can have a constant wall thickness.

There are a lot of products which can be manufactured through the process of injection blow molding, especially hallow products such as bottles, can, and also small containers. The injection phase process is able to create the neck with excellent tolerances. The benefit you can take from this process is that the undercuts can be included into the design of injection blow mold for producing certain product like mascara bottles.


Post time: 06-03-2017