How to Pick a Plastic Injection Molding Machine to Fit Your Needs

Having a machine that can create a mass amount of identical plastic parts can be essential in many businesses. Plastic injection molding machines were made to be both versatile and efficient when it comes to mass production of plastic parts. To find a new, used, or pre-owned injection molding machine for sale, go and check out eBay for a large selection.

What types of plastic injection molding machine mounts are there?

Different machine types can fit in different spaces. Depending on your space requirements, there is a machine for you. The desktop injection molding machines are small injection molding machines and will fit on top of a desk. It is better for smaller spaces and smaller runs of molds. The benchtop injection molding machine is a large stand-alone machine that needs more space to function but can do larger runs.

Types of injection processes

Different types of injection machines have different processes. You will want to find out what process will work better with your molding needs. The process choices include:

  • Hydraulic - A hydraulic motor can reach higher pressures than an electric motor, which may be necessary for some mold types. The hydraulic motor uses more electricity because the motor is always running.
  • Electric - Electric machines are digitally controlled and have faster output. They also use less energy and cost less to maintain, but they have a higher up-front cost.
  • Hybrid - Hybrid machines combine the efficiency of an electric machine with the high pressures of a hydraulic machine.
What types of plastics can be used in these machines?

There are a ton of different plastics that can be used in the injection machines. Different plastics have different benefits, such as impact or moisture resistance and how well metal coatings adhere to the plastic. When choosing a plastic to work with, make sure its properties fit your needs. Some of the more common plastic types include:

  • ABS - ABS is a commonly used plastic because it has high impact resistance and rigidity. Metal coating adheres well to this plastic.
  • Polypropylene - This plastic has high stiffness and low friction because it is finished with a glossy surface.
  • Polycarbonate - This has a good impact strength and also is temperature-resistant. It also is resistant to chemicals.
  • PVC - PVC has good insulation properties. It is also low in cost and flame-retardant.
  • Polystyrene - This has high impact resistance and strength. FDA grades are available.