Controllers Injection Pressure

The processing conditions are Injection pressure (dynamic fill, and pack & hold), Melt temperature and Injection time.

Available as a standard option on the MACO Compact (see alsoMACO Compact Retrofits for Van Dorn/Demag HTTM* Machines).

Controlling Injection Pressure

Melt temperature and injection time are easily achievable, since they are fixed values that can be directly entered into an operator interface on the machine. Injection pressures are a different story. Conventional molding techniques attempt to achieve recommended injection pressure by means of a velocity profile. But a constant velocity does not correlate to a constant internal melt pressure due to the non-linear behavior of material. This results in linearization of the polymer during the dynamic fill stage up to 10:1 in comparison to the pre-molded spherical structure; residual stress and micro cracks from the pack and hold stage; and excessive shear.