Injection moulding

The cost-efficient production of injection moulded parts requires the shortest possible cycle times, which are in the range of just a few seconds for mass-produced articles.

For this purpose, we use the hybrid injection moulding machine Arburg Allrounder 470 H 1000 – 170, which combines electric speed with hydraulic power.

The Arburg 470 H 1000 – 170 is the ideal injection moulding machine wherever short cycle times and high precision with very thin walls are required. In addition, thanks to its installed ProFoam unit, the machine has the option of thermoplastic foam injection moulding (TSG). This combination allows, for example, foamed thin-walled articles to be produced in very short cycle times.

The Krauss Maffei KM 65/ 180/ 55 CX V is a universally applicable, hydraulic two-component injection moulding machine for small processing quantities. With its special clamping system and control software, high-precision embossing functions such as expansion, closing, and opening embossing can be performed by the machine.

• Movable turntable with vertical centre plate (rotating/ oscillating)
• 2C operation with parallel injection units with bolt shut-off nozzle
• Precision embossing, breathing (injection embossing EXPERT)
• Core mould: 2C plate variotherm with plunge edge (200 x 400 mm)
• Core pulls: FAP (1 x pneumatic, 2 x hydraulic)
• BAP (1 x pneumatic, 2 x hydraulic)
• MP (2 x pneumatic, 4 x hydraulic)
• Standard 1C operation with ejector dummy
• Linear system for part removal
• Foam injection moulding (chemical, MuCell)
• 2K overmoulding
• Injection-compression moulding
• Variotherm mould temperature control
• Long-fibre reinforced thermoplastics (LFT pellets)

• Tie-bar closing unit, servo-electric, with 2-train knee lever.
• Valve gate nozzle
• Temperature monitoring for both clamping platens
• Freely programmable interfaces (4 inputs, 4 outputs)
• TFT touch-screen colour monitor

The injection moulding compounder (IMC) machine concept combines a twin-screw extruder for compounding with the piston injection system and clamping unit of a standard injection moulding machine. The combination of a continuously operating machine unit with a cyclically operating machine unit is achieved by integrating an intermediate melt accumulator. The co-rotating twin-screw extruder can be adapted to a wide range of homogenising and mixing tasks by selecting various screw elements and adapted speeds, so that a uniform compound quality can be ensured.

In this way, fibres, fillers, reinforcing materials, and additives can be efficiently incorporated into polymer matrix systems and processed into components without re-melting. The reduction of fibre breakage by incorporating continuous fibres allows the preparation and shaping of long-fibre reinforced thermoplastics. In the injection-moulded component, considerably greater residual fibre lengths are finally achieved than with conventional long-fibre injection moulding, resulting in excellent mechanical properties.

In cooperation with Neue Materialien Bayreuth GmbH, we have an IMC injection moulding compounder at our disposal that enables the feeding of up to 16 glass fibre rovings for the production of D-LFT components. A gravimetric dosing unit ensures the continuous dosing of up to 4 components, althouh the dosing of powder is also possible. In a granulate dry air dryer, the materials can be preconditioned for processing in three 100 l individual chambers.