What we do:
NTD mould a wide range of engineering and commodity plastics in shot weights from a few grams to 1.5 kilograms, including PA, POM, PC, PP, ABS, AES, ASA, PE, TPU, TPE, PSO, HIPS, PVC and PBT.
Over moulding is a multi-shot injection moulding process that produces a single product from two or more different thermoplastics. The first “shot”, known as the substrate, is typically the more rigid of the two materials being used and is designed to accept the subsequent shots / over-moulds.
A variety of thermoplastics can be used for the over-mould, but they’re usually softer and more flexible than the substrate. The over-mould material may be mixed with colourants, foaming agents, and other additives to achieve the desired effect upon completion. Over-moulding typically allows for cosmetic differentiation in a part while also enhancing tactile performance.
Insert moulding is the process used to locate nuts, bolts or metal parts fixed inside cavities for injection moulding. These inserts can be stainless steel, brass or steel. Knurled brass inserts are commonly used as they have good retention in the moulding.
How we do it:
We have invested heavily in new technology over the last few years, with 10 of our 13 moulding machines being new. Our machines include a mix of full-electric, electric hybrid and hydraulic machines, with clamping forces ranging from 50 to 380 tonnes.
To allow automatic operation and increase productivity, we have added 3-axis robots to our new machines and continue to add more. Raw materials are automatically fed into machines using hopper loaders, and finished products are placed on conveyors to increase our automation.