Rotomoulding
Rotational moulding facilitates the production of hollow, seamless and relatively stress-free products in a wide range of polymers.
In the moulding process using biaxial rotation, a hollow tool containing a measured amount of fine particle polymer is heated. As the tool heats up and rotates, the polymer adheres to the surface of the tool. Once all the polymer sticks to the mould, the tool is cooled allowing the polymer to solidify. The seamless moulded part is then removed from the tool.
The rotomoulding process can achieve very complex geometry and fine detail, such as in tread forms, as well as the incorporation of pre-machined metal inserts. Products of various sizes can be moulded: from small parts weighing around 50 g to very large ones of more than 1 tonne.
Persico rotational moulding technology makes it easier to manufacture very complex mouldings from high-quality aluminium tooling.
Persico customers can choose from a variety of mould techniques and treatments:
CNC moulds
- Persico’s 5-axis CNC milling machines produce high-quality moulds in much less time
- CNC milling means greatly reduced milling and delivery time
- Higher quality, tighter tolerances and improved aluminium properties for large moulds
- Extremely precise flange assembly and internal surface profile
- Better surface finish from aluminium block than cast aluminium
- The greater the complexity, the greater the benefits of CNC-machined moulds compared to cast moulds
Cast moulds
- A dedicated in-house foundry able to manufacture large high quality aluminium castings for large moulds with simple and/or complex geometry, such as boats, sprayer tanks and underground septic tanks
- Special effects can be achieved to replicate the look of wood, rock, terracotta and leather
Light moulds
- An innovative CNC mould concept focused on increasing the exposure of the mould to heating and cooling, by introducing a minimized framing structure ·
- This innovative structure replaces the conventional one that typically generates shielding, energy absorption and additional useless weight ·
- Specifically designed clamps installed directly on flanges distribute the pressure evenly along the flanges, thanks to integrated reinforcing ribs in the mould shell ·
- Drastic weight reduction and enhanced heat exchange are the key advantages offered by this technology
- DTH tools
- Tooling with pressure, inert gas or vacuum capabilities
- Manual and automatic clamping
- Automatic tool opening and closing
- Production cells including tooling and machinery
- Partial or fully automated production cells
- Cooling jigs
- Trimming jigs
- Automation (robotic warehouse and handling/transfer systems)
- Polyethylene, XLPE, polypropylene, PVC, nylon, polycarbonate ETFE, PVDF, EVOH, PVA, PEEK, PBT, polystyrene, polyester TPU, PU.
- Lightweighting
- Part reduction
- assembly time reduction
- Rotational moulding can achieve increased part complexity, allowing for a reduction in the total number of parts and product assembly time.
- Design and co-design
- R&D
- Material testing
- Feasibility analyses
- Tooling design
- Tooling manufacturing engineering
- Process machinery design and manufacture.
- Process automation
- Prototyping
- Pre-series testing and production
- Service / Maintenance
- Training
- Spare parts
- ‘Leonardo’ fully automated DTH rotational production machine
- ‘SMART’ semi or fully automated electrically heated DTH rotational production machine
- Automotive Fuel tanks, oil tanks, water tanks, Interior fittings
- Architecture/Urban design Specialist cladding, living walls, rain water components, road furniture, litter bins, street furniture
- Buses Seating, cab dash boards and fittings, bumpers, external covers, fuel tanks, engine oil tanks, fresh and waste water tanks
- Railways Fresh and waste water tanks, seat components, external covers, signalling
- Transport Pallets, specialized shipping containers, insulated food containers, chemical shipping containers
- Trucks Fuel tanks, oil tanks, water tanks, AdBlue tanks, wheel arches, mud guards, air vents, lighting housings
- Marine boats Tenders, sailing dinghies, power boats, rescue boats, fishing boats, kayaks, canoes, SUPs, windsurfers
- Marine infrastructure Docks, floating jetties, mooring buoys, large and small navigation buoys, fenders, cable floats and protectors
- Furniture and fixtures Seats, tables, upholstery frames, beds, baths, sinks, toilets, urinals
- Lighting Hanging lights, floor lights, architectural lights, interior light mouldings of all sorts
- Liquid storage Large and small water tanks, chemical storage tanks, steel tank linings
- Agriculture Storage tanks, sprayer tanks, seed and fertilizer distribution tanks. Agricultural machinery: cab dashboards, cab roofs, seats, fuel tanks, hydraulic oil tanks, mudguards, under-the-bonnet components and tanks
- Composites Removable parts and equipment, slides, CLI permanent mandrels and formers for composite wrapping and filament winding
- Industrial components Machinery covers, oil water separators, fan housings, compressor housings, electrical component housings
- Toys/playgrounds Large playground equipment, slides, climbing frames, tunnels, water slides, small children’s toys, doll animals, play cars
- Wastewater infrastructure Large and small pipe joints, large and domestic grease traps, large and domestic oil and water separators, rain and grey water storage tanks, sewage storage and treatment plants
- Underground infrastructure
- Medical/Health care Medical furniture, beds, dressers, tables, storage trollies, care and rehabilitation aids, raised toilet seats, toileting chairs, specialized steps and home aids
