Products and Services

Hunprenco is made up of 3 divisions. The main activities are with the Plunger & Cooler division for NNPB, PB and Blow Blow operations. We also manufacture a vast range of Precision Engineered components to customer requirements.

Cooling Tubes

In 1999 Hunprenco started supplying cooling tubes to customers to the same standard and quality as the plungers. This developed into the cooler division.
Cooling tubes for both NNPB and Standard Press/Blow production are produced on CNC machines. Tube coolers are swaged to meet customer requirements for profile and accuracy, using swaging dies manufactured in-house to cover a wide range of tube sizes in both mild steel and stainless steel.

The swaging technique ensures a uniform wall thickness and maintains concentricity to give excellent base fit and assembly, also allowing the internal tip profile to smoothly follow the external tip profile to improve cooling air flow within the plunger.

In addition, an anti-rotation mechanism has been implemented to eliminate movement and enhance cooler performance.

All cooling tubes undergo inline inspection, as well as final inspection, which includes a water and airflow test for vent hole clearance. A certificate of conformity is issued with all goods dispatched.

Tube Material and Sizes

A vast range of standard die sets are in stock and these are manufactured in-house with this facility able to produce additional to customer requirements.

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