Injection moulding

Producing moulded parts quickly and easily

Injection moulding can be used to produce moulded parts ranging from a few milligrams to kilograms in mass. Even complex geometries can be realised fully automatically in a single operation. The process is also characterised by high reproducibility and a low rate of rework. For this reason, injection moulding is currently the most important technology for producing moulded parts out of thermoplastics.

We have a large number of injection moulding machines at our disposal. The clamping force of the machinery ranges from 50 to 250 tonnes. The focus is on special processes such as foam injection moulding, and the processing of long-fibre reinforced thermoplastics or high-temperature thermoplastics. Highlights in our inventory of equipment include an injection moulding compounder from Krauss-Maffei, and a foam injection moulding machine from Engel, which we access in cooperation with Neue Materialien Bayreuth GmbH.

 

Sebastian Gröschel | Polymer Engineering Bayreuth

Contact: M.Sc. Alper Aksit
Phone: +49 921 55 7472
E-mail: alper.aksit@uni-bayreuth.de

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.

Clamping unit servo-electric

Clamping force [kN] 1,000

Clear distance between tie bars [mm] 470

Minimum installation height [mm] 250

Maximum platen spacing [mm] 850

Maximum processing temperature [°C] 450

Physical blowing agent N2 or CO2

Injection unit 170

Screw diameter [mm] 30

Effective screw length [L/D] 20

Maximum injection volume [cm3] 85

Maximum injection pressure

  • 0%
  • 2000

    Maximum shot weight [g PS] 77

    Maximum loading pressure [bar] 50

    Location: University of Bayreuth

    Contact: M.Sc. Alper Aksit

    Phone: +49 921 55 74 72

    E-mail: alper.aksit@uni-bayreuth.de

    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.

    Clamping force [kN] 650

    Clear tie bar spacing [mm] 420 x 470

    Minimum installation height [mm] 250

    Injection unit A1

    Screw diameter [mm] 25

    Effective screw length [mm] 650

    L/D 26

    Max. Injection volume [cm³] 52

    Max. injection pressure

  • 0%
  • 2,500

    Maximum processing temperature [°C] 450

    Injection unit B

    Screw diameter [mm] 20

    Effective screw length [mm] 400

    L/D 20

    Max. Injection volume [cm³] 24

    Max. injection pressure

  • 0%
  • 2.025

    Maximum processing temperature [°C] 450

    Location: Neue Materialien Bayreuth GmbH

    Contact: Sebastian Gröschel

    Phone: +49 921 55 74 62

    E-mail: sebastian.groeschel@uni-bayreuth.de

    • 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)

    Clamping force [kN] 4,500

    Clear tie bar spacing [mm] 800 x 900

    Minimum installation height [mm] 350

    Injection unit 1 [mm] 60 (MuCell)

    Injection unit 2 [mm] 60

    Max. Injection weight [g/hp] 700 each

    Max. injection pressure

  • 0%
  • 2,000

    Maximum processing temperature [°C] 450

    Property of Neue Materialien Bayreuth GmbH
    Location: Neue Materialien Bayreuth GmbH

     

    Contact: Christin Baumgart

    Phone: +49 921 50 736 112

    E-mail: christin.baumgart@nmb-gmbh.de

    • 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

    Clamping force [kN] 500

    Clear tie bar distance [mm] 370 x 320

    Minimum installation height [mm] 150

    Screw diameter [mm] 150

    Screw length [mm] 30

    L/D 20.5

    Maximum barrel temperature [°C] 350

    Location: Neue Materialien Bayreuth GmbH

     

    Contact: Christin Baumgart

    Phone: +49 921 50 736 112

    E-mail christin.baumgart@nmb-gmbh.de

    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.

    Clamping force [kN] 2,000

    Clear tie bar spacing [mm] 560

    Minimum installation height [mm] 350

    Screw diameter [mm] 25

    Screw length [mm] 1,200

    L/D 48

    Injection piston diameter [mm] 60

    Max. Injection weight [g/hp] 650

    Maximum injection pressure

  • 0%
  • 2,000

    Maximum cylinder temperature [°C] 400

    Property of Neue Materialien Bayreuth GmbH
    Location: Neue Materialien Bayreuth GmbH

     

    Contact: Christin Baumgart

    Phone: +49 921 50 736 112

    E-mail: christin.baumgart@nmb-gmbh.de

    WEITERE AUSSTATTUNG UND TECHNIKA

    English