Gas Injection Technology (GIT) is suitable for many different plastic parts

The Process

Why gas assisted injection?

THE 3 STEPS OF THE GAS INJECTION Injection of melted plastic mass Gas injection After pressure gas phase

The possibility of designing parts with strong thickness...

freedom of style.

rigidity improvement.

simplification of the tools.

reduction of clamping force.

...thanks to the creation of hollow zones:

elimination of the sink marks.

reduction in the cycle time.

saving in polymer.

A packing pressure homogeneous and effective:

a better respect of the form (elimination of warpage).

There are several methods of gas injection:

The partial filling of cavity (± approx. to 70 %) with polymer followed by gas.

The complete filling of cavity and hollowing by gas:

by compacting the plastic material and by compensating the shrinkage during the packing step.

by pushing the plastic material into a over-flow cavity.

by driving back the plastic material towards the screw (backinjection).

The parameters related to gas injection are, the time lag compared to the beginning of polymer injection, duration of gas applied, the level of pressure and its profile.

Many gas injection procedures are free of patent rights. There are existing gas injection procedures which are covered by third parts rights. BAUER may not be hold responsible for the use of procedures which are covered by third parts rights.