Extrusion blow moulding (EBM)
In extrusion blow moulding, a tubular preform is adapted (extruded) to the inner contours of a tool mould using pressure. A typical feature of packaging made using this technology is the welding seam at the base of the bottle. The advantages of the procedure include the wide range of potential designs (round, angular, oval, with handle) and the flexibility in the production output.
EBM is particularly suitable for bottles and packaging for cosmetics, household cleaning products, drinks and food, as well as oils and lubricants.
Injection stretch blow moulding (ISBM), two-step process
ALPLA primarily follows a two-step procedure for the production of PET bottles. Preforms are first produced in the injection moulding process. In the second step, known as stretch blow moulding, the preforms are heated up in the machine and then stretched to the shape of the product in the tool. The typical feature of these bottles is the clearly distinguishable injection point at the base of the bottle. The advantages of this technology include rapid cycle times and high output quantities.
PET bottles are suitable for carbonated drinks, but ALPLA also specialises in the use of this technology for household and personal care products.
ALPLA utilises the one-step PET process at selected locations. This handles the production of the preform and the stretch blow moulding of the bottle in a single process.
Injection moulding (IM)
Injection moulding is one of the principal procedures for producing moulded plastic parts. Here, plastic mass is injected into a tool mould under pressure and cooled. There is a virtually unlimited choice of shapes and surfaces available. ALPLA uses this technology to primarily produce individual components and caps. PS, PP and PE are the plastic materials used.
Injection blow moulding (IBM)
ALPLA also uses the injection blow moulding process at certain sites for smaller containers with high quality requirements. Due to the high dimensional accuracy, low weight fluctuation and good surface quality, the injection blow moulds are particularly suitable for the production of jars or roll-on deodorants. Typical plastics processed by means of this technology include PE, PP and PET.