Compression moulding technology
■ What is it?
Aisa’s compression moulding technology at the forefront
- Extruder with axial pressure piston for better material melts and fast colour change.
- Optimised extruder and dosing heating profile for evenly low-tempered doses and improved sleeve welding.
- Spiral flow dosing head for stress-free symmetrical doses.
- Volumetric dosing eliminates dose weight variation.
- Our in-house production includes high cooling moulds made with laser sintering.
- Two-step compression process adapts compression mode based on material and design criteria.


1. Volumetric dosing (B) eliminates dose weight variation of the doughnut (C).
2. Outer and inner parts (F)(G) of the mandrel are pushed down.
The outer part (G) of the mandrel is closing the mould before pressure is applied.
The outer part (G) of the mandrel is closing the mould before pressure is applied.
3. Pushing the inner part (F) of the mandrel further down moulds the shape of the tube head.
4. The measurement of the thickness of the moulded shoulder is done and transmitted to the dosing regulation system. This system controls the shoulder dosing and can adjust the thickness by varying the amount of material dispensed. If you’re working with PCR and non-homogenous materials, this feature will prove very useful.
5. After cooling under pressure in the closed mould and welding the shoulder to the sleeve, the mandrel lifts and releases the perfectly shaped tube with a clean orifice.
A. Extruder with axial pressure piston
B. Volumetric dosing system
C. Doughnut (PE dose)
D. Orifice pin
E. Sleeve
F. Internal mandrel
G. External mandrel
■ Availability
On all Aisa PTH heading tube machines.

■ Synchroflow™ technology benefits
- Enhanced tube shoulder appearance.
- Excellent aesthetics, no flow lines on coloured shoulder.
- Perfect welding for round shoulders.
- Cleaner and smaller orifice now possible.
- No air trapped on the shoulder head.
- No crooked shoulder head.
- Improved economics.
- Faster and less frequent tooling change-over.
- Improved process stability leading to higher productivity.
- Reduced tooling needs, through standardisation.
- Up to 60% lower investment on dosing nozzles.
- Faster colour change-over.
Our other technologies :
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