Injection moulding machines for special, high-output applications

Six Station, six clamping units, rotary injection moulding machine complete with 1,450×1,650 mm platens and 220 tons clamping force with nominal injection volume of 13,855 cm3. The machine is used in the road safety sector

Presma (Gornate Olona, Italy) has always been producing special injection moulding machines to process both virgin and recycled thermoplastic materials, as well as, for some years now, natural rubber and silicone, into compact, semi-expanded, two-component and gas-moulded parts. Its range includes over 100 models having clamping forces of between 6 and 1,600 tons and platens measuring up to 3.5 m2, versions with modular clamping units, featuring 1, 2, or 3 stations, and rotary units with between 2 and 18 stations; the machines are available with horizontal or vertical mould opening with sliding bottom mould half; reciprocating-screw or transfer (screw + piston) injection units, multicolour or co-injection (sandwich structure) heads. The range also includes working cells made up of several injection moulding machines served by anthropomorphic robots, used for the production of multicolour parts, and vertical tie-bar type or tie-bar-less machines with a sliding or rotary table housing two bottom mould halves. Presma’s Non Standard Technology machinery, often subject to confidentiality restrictions, is very unlikely to be seen at the various industry events that this Varese-based company regularly takes part in. Consequently, the machines exhibited often do not reflect the very best solutions it can provide, although they are certainly able to show that its technology offers efficient solutions in terms of productivity and flexibility, sometimes integrated with automated and remotely controlled systems. Presma’s key strength has always been its rotary machine concept, based on the combination of one or more injection units with a “carousel” of moulds. Visitors to the forthcoming K trade fair in Düsseldorf (Hall 15, Booth C57) will be able to appreciate the potential of a full-electric “rotary machine” designed specifically to produce thermoplastic foam corks for oenological use. This machine features a new platen drive and a brand new mould opening/closing system solving several problems that have recently been highlighted in the production of certain T-corks for spirits. The exhibit on show, which represents an evolution of the range of specific equipment for this field that includes four models having different productivity levels, offered in various versions, both hybrid and fully electric, that can be equipped to manufacture two materials/colours corks and to overmould inserts. Also on show at the company’s booth there will be a range of large co-injected and recycled thermoplastic products produced using the large size rotary machines which, like all Presma solutions, are entirely Italian made.