During the plastics melting, plasticizing process, melted materials constantly move toward the barrel front-end (measuring chamber), and more and more, and gradually formed a pressure to promote screw back. In order to prevent the screw back too quickly, to ensure melted material uniform and compacted, you need to give a opposite pressure to screw this opposite directional pressure is called injection machine backpressure.
Injection machine backpressure, also known as the plasticizing pressure, it is controlled is by oil return throttle of injection molding machine cylinder.
Reasonable adjustment for the injection machine backpressure can increase the stablability of injection volume and production dimension, reduce the water gas in the plasticized materials and improve the injection defects, like deformation, sink mark, welding lines.
If you want to know more about injection machine backpressure, or want to know how to use injection machine backpressure advantages, pls contact Dakumar.

By Miss Martina
Skype: sinomould-17
Email: dkm@dakumar.com