Forming Process

From bottle molding to blow molding, no reheating required. Available in 2/3/4 stations for flexibility.

Equipment Configuration

One set machine handles multiple bottle shapes (Hot type embryo method).

Cost & Efficiency

Less labor, energy consumption & floor space.

Key Advantages

• Low contamination risk (less handling)
• Wide range of product shapes
• Lower defect rates, higher quality consistency

Forming Process

Injection and blow molding are separate processes, requiring separate heating.

Equipment Configuration

Multiple machines: injection molder, storage, reheat & blow molding (Cold type embryo).

Cost & Efficiency

Higher labor, energy use, and floor space.

Considerations

• Higher risk of contamination/moisture issues
• Limited product shape variety
• Higher defect rates, more process steps

Molten PET resin is injected into a mold cavity to form a "test-tube" like preform with a finished neck.

Excess material (tail) is removed. The preform temperature is equalized to ensure optimal stretching elasticity.

A rod stretches the preform vertically while high-pressure air expands it horizontally against the mold walls.

The mold opens and the finished bottle is ejected via robot or gravity for packaging.

Involves three integrated stages: injection molding to create a preform, stretching the preform mechanically, and blow molding it into the final shape. This occurs in a single machine without needing to reheat the preform, optimizing overall thermal efficiency.

Involves the continuous extrusion of plastic material into a hollow parison (tube), followed directly by inflating it within a mold. The process is simpler but often requires separate finishing operations, including tail cutting and potential parison reheating.

Tends to produce products with superior dimensional stability, higher tensile strength, and vastly improved gas barrier properties. This is due to the bi-axial molecular orientation triggered by the physical stretching process.

Typically results in slightly lower absolute precision, but is significantly better suited for structural components with handle grips, off-center openings, complex dual-chamber configurations, and hollow containers.

Used extensively for producing premium high-precision, crystal-clear, and smaller bottles. Highly preferred for cosmetics, carbonated beverage bottles, premium pharmaceuticals, spirits, and personal care packaging.

Widely preferred for larger containers, industrial tanks, and standard jerrycans. Excellent for chemical bottles, household detergent containers, heavy-duty drums, automotive components, and water coolers.

Offers greatly optimized energy efficiency in 1-step machines. Because the preform retains injection-molding heat and moves immediately to stretching/blowing, it bypasses reheating, reducing energy consumption by up to 40%.

Consumes more electrical energy during structural heating of raw resin extrusions. The extrusion screws and die heads require continuous high-temperature maintenance, and flash/waste trim must be collected and reheated.

Provides extraordinarily fast, stable cycle times. It is ideal for ultra-high-volume, continuous batch productions with zero-defect requirements. Tooling changes are more complex, locking in dedicated designs.

Generally slower for small-capacity bottles but delivers outstanding modular flexibility. It features lower initial tooling and mold setup costs, allowing swift prototyping and easy switching between distinct container shapes.