Polyurethane Casting

Rigid Polyurethane is cured by catalytic action at room temperature resulting in design benefits well beyond other plastics.

The polyol resin is mixed with an isocyanate hardener and curing takes place within the hour. Like thermoplastics rigid polyurethane is light, which equips it well to compete with metals on weight/strength ratio.

The process

The processes employ techniques very similar to sand casting, particularly the pivotal role of accurate moulds. Like aluminium, the high fluidity of rigid polyurethane at moulding, means an ability to form accurate parts, with shallow recesses, deep wells and slots and with low warp characteristics.

Techniques at Norse Precision Castings allow wall thickness from 1mm to 30mm with tolerances as low as ±0.3mm and excellent machinability enables the finished part to be offered with even tighter tolerances. Strengthening ribs may be added easily in recognised areas of stress, giving the designer the luxury of putting material only where it is needed. Hidden benefits emerge however with its ability to be moulded cold.

Benefits of Polyurethane Casting

Precise mouldings without risk of damage

Inserts such as threads and bearing surfaces can be placed without difficulty but the absense of high temperatures during the manufacturing process means more delicate items such as electronic packages, connectors, and co-axial components can be encapsulated without risk of damage. Surfaces accept sprayed metals for EMC/RFI interference suppression.

The precision of moulding enables surface logos to be formed, and irregular shaped identification markings to be included. The mouldings can be supplied in a choice of finishes including smooth, textured or a 'suede' effect. Additionally silk screen printing can be applied for a complete product.

Benefits of Precise Mouldings

Want to find out more?

Our team would be more than happy to discuss your requirments and answer any questions you may have. Simply follow the link below:

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