Additional Information:
2K Co-Injection Moulding Machine
This machine from the prestigious Austrian manufacturer Battenfeld is a 2007 horizontal injection moulding machine with 100 tonnes clamping force and a special Co-Injection (Sandwich Injection) configuration.
How Does Co-Injection Work?
The two injection units do not operate independently — they meet inside a combined nozzle. First, Unit A injects: the first material adheres to the mould wall and forms the outer skin. Then Unit B follows: the second material flows into the core of the first, pushing it forward. The result is a part with an outer skin of Material 1 and a core of Material 2. If both materials are injected simultaneously or overlapping, a decorative marble or blended colour effect is achieved. The entire process takes place in a single cycle with a standard mould — no expensive rotary platen tooling is required.
In the current production of this machine, Unit A feeds green and Unit B feeds yellow material of the same plastic type, both injected simultaneously through a single combined nozzle into the mould. As the green and yellow materials flow side by side and into each other, a natural marbled colour effect is created on the part surface. Permanent and visually appealing coloured surfaces are produced in a single cycle — no labels or post-painting required.