Custom-Built Presses

Dual-compound injection

Multiinjection dual-compound multistation press for rubber molding
Dual-compound CMX: an exclusivity by REP!

Special Presses

The dual-compound machine or multiinjection press

Equipping an injection molding machine with a second injection unit has become customary to REP on all types of machines in all configurations: 

  • injection from the top
  • or the bottom,
  • the back
  • or the side.

The user's objective is to produce parts integrating several compounds of various characteristics. The goal consists in combining technical performances at optimized costs:

  • elimination of assembly operations
  • integration of a low-cost compound into a part, thus limiting the quantity of noble compound to the functional part only



The dual-compound injection principle can be adapted to all injection presses, regardless of the size of the closing units and of the injection units.

 

The production of dual-compound parts may be performed using:

    • Two sequential injections into two complementary cavities,
    • Simultaneous injection into two different cavities or in two separate part cavities,
    • Simultaneous (or offset) injection into one single cavity.

 

It is either possible to directly inject into the mold or through a special cold runner block (CRB) integrating several compound circuits.

 

Let's have a look at the dual-compound CMX: That's productivity, versatility and flexibility!

The dual-compound multistation machine (CMS in G9 and CMX in G10)  is an injection press with 4 rotating stations and 2 injection units.

It allows for the synchronous curing, stripping, and injection of 2 compounds in the same mold.

Productivity 

Much higher hourly production: gain in productivity of 50 to 100% compared to a single-station press of 400 tons.

Quick mould change (10 minutes for 4 moulds).

Flexibility

Possibility to disable a mold.

Ability to program different shot sizes.

Versatility

Adaptation of the stripping station to various kinematics.

The dual-compound multistation press is not only dedicated to dual-compound injection: users can switch from simultaneous injection to sequential injection, or only use an injection unit if required !

 

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