Steinl Group: New vertical machines, automation, adhesive and sealing technology, and biopolymer applications
LWB Steinl, the manufacturer of rubber processing machines headquartered in Altdorf-Landshut, Germany, has emerged to a broad-based group of eight companies within the last eight years. Five of the eight companies will give a comprehensive overview of their expertise at K 2019 on the joint stand of the Steinl Group. Beyond elastomer injection moulding and rubber processing technology, these include, in particular, the adhesive and sealing technology, but also the development and application of fibre-reinforced biopolymers.
Vertical elastomer injection moulding machines with leading ergonomic levels
LWB Steinl will introduce a machine system featuring a vertical rotary table clamping unit, characterised by top marks in operating and maintenance ergonomics. Its central component is a stand-alone, therefore universally accessible, three-pillar clamping unit with a horizontal plasticising and injection unit, which centrally injects via a diverter through the upper machine plate. The horizontal plasticising and injection unit keeps the overall height of the production cell low, which is an operational advantage in halls with low clear height.
Due to this concept and the low round table clamping area of just 1,000 mm above the floor, the new machine concept offers ergonomic advantages, in particular for injection moulding tasks with a high proportion of manipulation, e.g. for the addition of rubber profile frames to car glass panes. The machine drive module including hydraulics is a stand-alone unit as well and thus accessible from all four sides for maintenance and set-up jobs.
The second example from the vertical machine programme is a C-frame machine with a clamping force of 1,000 kN and 1,000 cc EFE-injection unit. In combination with a two-cavity cold runner tool integrating a new cold-runner-system from ITS-Huber, which is capable for an operation optionally with or without pressure sensors in the mould cavity the production of rubber doorstops will be demonstrated.
Automated elastomer parts handling and post-processing
The automation potential is demonstrated with a two-machine production cell consisting of a top-closing C-frame-machine in thermoplastic version, type VCRS 500/115 and a portal-frame-machine, type VRF 1100/160. Assisted by a six-axis robot, they are moulding a two-component shaft seal consisting of a polyamide ring part and a moulded-on EPDM rubber seal. As a new feature, a plasma treatment station is used between the two injection moulding stations for optimum cleaning and activation of the polyamide surface. The sealing lip is then mechanically post-processed and checked for dimensional accuracy within the production cell.
Liquid sealing technology complements rubber element sealing technology
The Dreibond GmbH in Ismaning near Munich, part of the Steinl Group since 2013, focuses on the development of adhesive and sealant applications for high-volume production. Based on 40 years of experience, system solutions ranging from the development of liquid adhesives and sealants to the design and manufacture of process-reliable application systems in industrial assembly lines can be offered from a single source. The applications go far beyond the bonding and sealing of flat surfaces, e.g., up to rotor spray applications in holes, as well as the oiling and greasing of bearings and threads or the press fitting of sealing rings.
Biomaterials expertise since 2011
Biofibre GmbH, founded by LWB Steinl in 2011 and based in Altdorf/Landshut, Germany, develops, produces and sells natural fibre-reinforced bioplastics for thermoplastic processing into moulded articles, with a focus on injection moulding. The bioplastics produced are characterised by high eco-efficiency. It results from the production without fossil fuels and the high proportion of recycled plastics. The material development is carried out in close cooperation with the Technical University of Munich. The alliance with Naftex GmbH in Lower Saxony, which was acquired in 2019, ensures compounding in industrial quantities.
Rubber compound batch-off cooling units
The Italian company Prodicon International Slr., Milano, is the fifth company of the Steinl Group on display. Prodicon is specialised in the development and production of batch-off cooling lines and special machinery for the rubber compounding in the tyre industry, as well as in the field of technical rubber products.
About LWB Steinl