Injection Molding

One of the most common methods of converting plastics from the raw material form to an article of use is the process of injection molding. This process is most typically used for thermoplastic materials which may be successively melted, reshaped and cooled. This versatile process allows us to produce high quality, simple or complex components. Injection molding consists of a high pressure injection of the raw material into a mold cavity which shapes the polymer into the desired shape.

Key Advantages & Benefits
of Molding Parts with injection molding:
  • Injection molding allows for high production output rates.
  • When producing your product you may use inserts within the mold. You may also use fillers for added strength.
  • Close tolerances on small intricate parts is possible with Injection Molding.
  • More than one material may be used at the same time when utilizing co-Injection Molding.
  • There is typically very little post production work required because the parts usually have a very finished look upon ejection.
  • All scrap may be reground to be reused, therefor there is very little waste.

Gas-Counter Pressure 

Injection Molding

Counter-pressure is best described as an operation extension of the standard injection molding process. The difference is how we are able to control the melt front of the incoming resin during resin injection. Molten plastic injected into a typical mold will flow in the path of least resistance. In other words, nominal walls fill first and then thinner walls or features are filled and packed nearer the end of the injection sequence. Counter-pressure provides a controlled resistance to the flow front, forcing some of the melt to enter the thinner or harder to fill areas during the initial injection.

Key Advantages & Benefits of Molding Parts with Gas-Counter pressure:
  • Physical property improvement due to cells spherical shape and uniform distribution in the whole part.
  • Denser surface greatly enhances the fatigue load resistance.
  • Greatly improves surface finish.
  • Part weight reduction due to foaming process.
  • Increased flexural modulus results in more durability from impacts.
  • Allows thicker wall sections than straight injection.