Understanding Plastic Molding Process

The plastic manufacturing is a process in which plastic molding companies make plastic materials. It involves a series of stages that turn raw oil and natural gas into plastic objects such as pipes, straws, hoses and other sophisticated application products. It is a complex process that starts with changing oil and natural gas into hydrocarbon monomers that are then linked together to form long chains called polymer plastics. Depending on the type of monomers that have been linked together, the plastic manufacturing process can help produce a wide range of polymer types such as polyethylene terephthalate (PET), polyvinyl chloride (PVC) and polyethylene, which are usually high density in form.

After the plastic polymer has been created, the next stage would involve transforming these polymers into simpler forms that can be used to make products. There are four sub-processes that are used and they include injection molding, rotational molding, extrusion and blow molding. Each of these processes is aimed at producing different plastic products for different applications.

Injection molding is a plastic manufacturing process in which compressed plastic polymers are fed into an injection molding machine to produce objects. The molding machines shape the pellets into the desired shapes and add other ingredients to give them the required color as well as texture. Injection molding produces products such as fittings, closures, containers and tubs.

Extrusion Molding: It is similar to injection molding only that shaped die is used to give the plastic mold a tube like shape. This is why plastic pipes are manufactured using this technique.

Blow Molding: It is a slightly complex process used to create hollow plastics with some form of neck. The process turns the plastic pellets into molds and air injected to create hollow openings. Injection blow molding produces only small containers while extrusion blow molding can produce large containers.

Rational molding: This is perhaps the most sophisticated and costly type of molding. Just like other molding processes, rational molding transforms plastic pellets into a mold. The only difference is that the mold is rotated to produce complex hollow shapes. Some of the products produced using this technique include toys and furniture. For more information about plastic molding, contact a plastic molding company at http://preplastics.com/.

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