Plastic Custom Molding: Three Different Molding Processes

Plastic custom molding is a process that allows a manufacturer to request a specific part. The company may need it for a specialized unit. It may also simply need a prototype for later mass production. The molding process the manufacturer requests will vary based on specifications, requirements and preference. These can and do vary depending upon the focus and capabilities of the molding company.

Three Molding Processes

When it comes to molding plastic, even customizing, plastic molding companies can offer a variety of different processes. Some are designed specifically to handle large volumes. Some are more adept at producing a specific type of custom plastic component. Below are three basic types of molding processes from which a manufacturer can choose:

1. Blow Molding: This involves forcing plastic into a mold by pouring the material out of a barrel. This type of mold production is best suited for creating high-volume, hollow objects. Examples of these one-piece parts include bottles and tubes

2. Compression Molding: This is a method involves compression (pressing) of two heated halves of thermoset resins, fiberglass or reinforced plastic. It usually involves vertical presses, producing parts for air-cooling before shipping them. The results of compression molding usually exhibit excellent durability and strength making them very suitable for auto parts

3. Injection Molding: After melting plastic, molders force it into a mold cavity. After cooling, they can remove the mold. This is the best method for handling requests for custom molding. They are also excellent mass producers of a bottle caps, kitchen utensils and toys
While other types of molding are available, including film insert and rotational molding, these three common types address specific demands and specifications.

Custom Molding

Molding processes all have strengths and weaknesses. It is important to understand what each process offers. By accomplishing this, your company can make an informed choice on what method is best suited for preparing a prototype for custom molding.

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