Rubber and Plastics Processing Equipment Key Terms

Explore rubber and plastics processing equipment key terms

By Shannon Tani

Plastic and rubber machinery is an essential part of many manufacturing companies. The two products are ubiquitous in our society. But someone new to the industry may have an difficult time understanding the different types of machines. For example, injection molding and extrusion work in similar ways, but with different results. Presses are another way that you can mold plastic. Learning the following terms related to plastic and rubber machinery will help you get started in the industry.

Injection molding

Injection molding is one way that manufacturers develop plastic and rubber products. In this process, melted plastic or rubber is injected into a mold in the shape of the finished product. As the product cools, it retains the shape.
Try: See an example of injection molding at TechnologyStudent.com.

Computer numerical controlled (CNC) machining

In computer numerical controlled (CNC) machining, manufacturers use a computer controlled machine to remove imperfections.
Try: Bluegrass Manufacturing describes CNC machining.

Presses

Presses use a pressing motion in order to shape the rubber or plastic into the desired design. Typically, there will be a male and female side to the press. When you put a sheet of plastic between the two, they pres together to form the shape.
Try: West Coast Rubber Machinery produces rubber presses. You can see several examples on their site.

Rubber extruder

A rubber extruder is similar to injection molding in that the rubber is pressed through a spout. However, an extruder does not have a mold at the end. It is used to shape long tubes of rubber, which can then be cut and used for other purposes.
Try: See examples of rubber extruders at Santosh.

Snap fit and press fit

Many plastic pieces are designed to either snap fit together or press fit together. In a snap fit, two pieces will snap together to stay put. A common example is in a ball and socket joint. In a press fit, a tube will snugly fit into a hole. Both styles require extensive planning and engineering to work properly.
Try: A page at the Penn State School of Engineering explains a snap fit. Learn more about a press fit at Engineers Edge.

Thermoforming

Thermoforming is a process by which a manufacturers form a plastic sheet into the proper shape through heating. Once the sheet is heated, it is placed into a mold to get its shape.
Try: You can learn more about thermoforming through Techniform Plastics.