Blow Moulding
Whether you’re producing PET bottles, cosmetic containers, or packaging in Tritan, PP, or PE, Tasman Machinery offers industry-leading solutions through our trusted partners: Aoki Technical Laboratory and SMC Corporation.
Aoki, based in Japan, is the global leader in 3-stage injection-stretch-blow moulding (ISBM) machines and tooling. Their technology delivers the lowest cost per bottle in the market, with exceptional energy efficiency and a reduced carbon footprint—especially in PET applications, the most widely recycled plastic worldwide.
SMC, headquartered in Thailand, specializes in high-speed extrusion blow moulding machines. Their systems are ideal for producing containers in HDPE, LDPE, PP, and PVC, offering flexible configurations with a wide range of extrusion heads, clamping units, and automation options. SMC’s machines are known for their reliability, efficiency, and adaptability across diverse packaging needs.
We also supply a full range of ancillary equipment to support blow moulding operations, including material handling systems, chillers, desiccant dryers, and downstream automation.
Injection Stretch Blow machines
Desiccant Dryer specialists
Ancillary suppliers
Desiccant Dryer specialists
Tool maintenance & cleaning aerosol sprays
Conveyors & buffer systems for injection moulders
Adiabatic cooling & chillers
Pressure Transducers & control instrumentation
Material Handling Systems
Bimetallic screws, barrels & tip sets
A step-by-step description of the blow molding process:
- Extrusion: The process starts with the extrusion of a thermoplastic material, usually in the form of pellets or granules, into a molten state. The plastic resin is melted and compressed in an extruder, which consists of a heated barrel and a rotating screw. The rotating screw pushes the molten plastic forward, melting it completely and creating a uniform melt.
- Parison Formation: Once the plastic material is molten and homogenous, it is extruded through a die head to form a tube-like shape called a parison. The parison is a hollow tube with a cross-sectional shape that corresponds to the final shape of the product. The size and length of the parison are controlled by adjusting the extrusion speed and the die shape.
- Mould Closing: The parison is transferred to a mould, which consists of two halves. The mould halves close around the parison, and a small amount of compressed air is introduced through the blow pin or mandrel. The compressed air inflates the parison, forcing it to conform to the shape of the mould cavity.
- Blow and Cooling: As the parison is inflated, the molten plastic is pressed against the inner walls of the mould, taking its shape and solidifying. The mould is designed with cooling channels to facilitate rapid cooling of the plastic. The cooling time varies depending on the material and the size and thickness of the product. Once the plastic has cooled and solidified, the mould is opened.
- Part Ejection: The mould halves separate, and the newly formed plastic part, now in its final shape, is ejected from the mould. The excess plastic, called flash, may be present at the parting line of the mould. This excess material is trimmed off and recycled for future use.
- Repeat: The process is repeated to produce multiple parts in a continuous cycle. The cycle time varies depending on factors such as the size of the part, material properties, and cooling time required.
Get Started