Blow molding processes are an ideal way of creating a range of different hollow plastic items. With air pressure, it is possible to inflate the plastic into its mold cavity. This process is similar to what the glass industry uses. There is a range of plastic items that use the technique. There are a few kinds, including injection blow molding, extrusion, and injection stretch blow molding.
About the Molding Process
First, the manufacturer begins with molten plastic for the base of the process, no matter the part you are making. Depending on the process, it might be a Parison or a Preform.
Next, the company will inflate the tube to the correct location. There are a few processes for that process, including injection blow molding, extrusion blow molding, as well as injection stretch blow molding.
About Extrusion Blow Molding
The process begins with the parison, and then hot air can move into the parison or tube. That inflates the preformed tube, creating a more hollow part. The mold cavity’s shape might impact the way the parison gets formed. The resulting pats could include containers, jars, or plastic bottles. Then the mold will open, allowing the part to get ejected. Another one will then take its place. That completes the process.
About Injection Blow Molding
First, the company will mold the plastic into a cavity, onto the core pin. Then the mold creates the piece’s outer portion, and it is based on the core rod. It can shape the preform’s interior. Then the preform can get shaped using a bottle or jar. There is a lot of polymers attached to the piece. Once the mold has opened, the rod moves the piece to the company’s blow station. Then the rod where the item is can open, blowing compressed air to the preform. The piece can get cooled before getting ejected.
The method works the best for smaller pieces, such as samples or pharmaceutical bottles. The technique can create hollow parts in more significant quantities. Still, the method is not as standard as other ones.
About Injection Stretch Blow Molding
The injection stretch blow molding process is similar to the one that injection blow molding uses. The polymer will move into the injection cavity on its runner block to form the preform. The pin will create the parts’ inner diameters.
Choose the Right Injection Blow Molding Machine Manufacturers Today
Pet All Manufacturing, Inc. is one of the best in the area when it comes to injection blow molding machinery. If you want to know more about our company, feel free to reach out to us today. We can help you choose the right machinery for the job.