Compression Moulding

Compression Moulding.

Your compentent solution partner.


Precise and repeatable movements.

The term "injection-compression moulding" refers to the introduction of thermoplastic melt into a slightly open mould with simultaneous or subsequent pressing (= compression moulding) via an additional closing stroke. This additional closing stroke can either be performed by the machine or by a coining punch in the mould. The resulting cavity pressure is distributed more evenly over the part surface, usually with the aim of improving the molding accuracy and dimensional stability of the parts. Injection-compression moulding is a low-pressure process, so that inserts such as decorations or metal inserts are protected from damage. Particularly in lighting applications, low injection and holding pressures can minimize internal stresses and thus significantly influence the optical properties. A suitable injection moulding machine must therefore not only have a high degree of flexibility, but also have very precise and repeatable movements.

  • Flexible
  • Precise
  • Repeatable
  • Error-free

Latest injection moulding technology.

  1. Closing of the tool to the embossing gap
  2. Injection of the thermoplastic melt
  3. Coining of the injected melt 
  4. Cooling and demoulding

Tailored to your applications.

  • Optical applications (e.g. lenses, diffusing lenses, headlights, displays, etc.)
  • Long-fibre reinforced moulded parts (e.g. door modules, underbody protection, etc.)
  • Decorated components (e.g. decorative panels, side panels, mobile phone shells, etc.)
  • Components with surface structures (e.g. Fresnel structures, Lotus surfaces, etc.)
  • Foamed components (e.g. insulation components, lightweight construction, etc.)
  • Components with problem areas (e.g. blowholes, sink marks at the end of the flow path, etc.)

Your benefits.

  • Flexible processes, precise starting and control of the clamp in different profiles and positions
  • Linear holding pressure behaviour (improvement of dimensional accuracy, sink marks and distortion)
  • Mould filling > 100% in the injection phase
  • Possible reduction of injection pressure and clamping force
  • Reduction of fibre alignment and internal stresses
  • Less material shear
  • Improved cavity venting
  • A feature that can be switched on, switched off and retrofitted to all standard injection moulding machines



Your contact person.

Thorsten Thümen
Senior Director Technology


Please contact us, we will be happy to help you.