Injection compression moulding

The injection compression moulding process enables the production of low-stress, thick-walled components without sink marks and with high contour accuracy. However, this is a complex process and requires a detailed knowledge of the process and high-quality machine technology. That’s where we come in.

Injection moulding machines with high positioning accuracy and high reproducibility, such as our hydraulic and electric ALLROUNDERs, are in demand for injection compression moulding. However, you can also rely on us when selecting compression technology and for the design and layout of the mould.


  • Universal injection compression moulding: machine controller enables free, customised programming without the need for non-standard programs
  • Hydraulic ALLROUNDER S: ideal for long compression paths and high compression forces
  • Electric ALLDRIVE series: for positioning accuracy to within one thousandth of a millimetre 

Process technology

Injection compression moulding
This process is characterised by a change in cavity volume during the ongoing injection and/or holding pressure phase. For this reason, the mould must be designed so that the cavity is sealed, even in the partially open state. With our expertise, this is sure to succeed.
to application consulting


LED lens
ARBURG participates in the OptiLight research project for the energy-efficient production of innovative hybrid lenses for LED streetlights. With the injection compression moulding process, precision free-form surfaces are produced which deflect the light in a targeted manner, according to a rectangular illumination profile.
to the moulded part

Belt pulley
In the case of thermosets, injection compression moulding increases part strength and prevents sink marks. The belt pulley is produced on a hydraulic ALLROUNDER 470 S using main axis compression moulding with the dual-pump technology. The compression gap in the mould is 7 mm.

Spectacle lenses
In the case of so-called ophthalmic lenses for spectacles, the thickness of the component can be determined via the compression path. The compression time for a 10 mm lens is 90 s. A hydraulic injection moulding machine with multi-pump technology is used.