Blow Molding or Plastic Injection Molding Service – Which is Best?

by | Jun 26, 2019 | Industrial Supplies

For plastic products, you can choose from several processes. For example, instead of old fashioned casting, you may want to go with blow molding or a plastic injection molding service. But what is the difference between these two methods and which one is best for you? Here is important information to help you decide.

Blow Molding

Did you ever watch a glass bottle blower create bottles? Blow molding is very similar. The process starts when plastic granules are melted and run through an extrusion process which creates warm plastic tubes. The tubes are cut to a specific length and then placed into molds. The molds contain the shape of the bottle or container to be manufactured. Air is then blown in to force the tube into all the crevices of the mold.

Blow molding takes very little time to create a large amount of hollow plastic containers. It is perfect for companies selling liquids and needing durable and inexpensive containers. This includes soft drinks, cleaners, and many other products.

Injection Molds

A plastic injection molding service company makes many parts for a wide range of products. Each part requires a specific mold, but once the molds are created, they can be used over and over again. The manufacturing process starts out similarly to blow molding. Plastic pellets are melted down, but instead of using extrusion (like blow molding), the hot liquid is injected directly into the molds. As the molds cool, the plastic part is removed.

Which One is Best

If you need plastic bottles or containers, blow molding offers the best options. It is cost-effective, fast, and can give you high production runs. When you need intricate parts, your plastic injection molding services can help you. The process is very efficient with little waste, allowing the manufacturer to pass the savings on to the customer.

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