Injection moulding is the technique for making complex plastic products with a high-quality appearance in large series. The production by means of robots is extremely efficient and, since there is barely any or no finishing required, the product costs are low. In addition, other product components can already be included in the mould, so that they are integrated with the end product. VDL Wientjes Emmen concentrates on injection moulding of technical and special plastics.
Thermoplast raw materials
Injection moulding involves working with thermoplastic raw materials, which are supplied as granulate, with or without glass fibres or other supplements integrated. After being heated, these granulates are injected under high pressure in the mould. The surfaces are exactly the same as the mould surface: smooth or textured, with logos, images or texts applied.
VDL Wientjes Emmen has a very well-equipped injection moulding factory with a large capacity, which houses machines with a clamping force varying from 500 kn to 20000 kN maximum. The shot volume varies from 1 cc to 10 liter. The maximum mould dimension is 2500 x 2200 x 1700 mm. The injection moulding machiness are capable to use a hotrunner system with hydraulic or pneumatic pin valve and are therefore suitable for casdade injection moulding. Above this the machines are capable to control hydraulic cores in complex moulds and moulds can be connected with Euro-Map-Standard. Every injection moulding machine is equipped with linear robots with one extra axe. For complex products, robot claws are made in house specifically for the product. For production with high standard technical plastics, the moulds are heated with thermo oil.
Unique at VDL Wientjes Emmen is the possibility to apply gas injection. By injecting gasses after filling the mould, a hollow product is created. As a result, less material is needed and the cycle time is reduced. Strength and surface quality are fully retained and even thick-walled components do not require strengthening ribs.
2 or 3 components
VDL Wientjes Emmen is also able to use two or even three components in injection moulding. A product consistent of two or three different materials is formed in one injection cycle. For example, a flexible sealer can be integrated or a product can be produced in two colours. For two and three components the maximum shotvolume is 200 cc. 3K injection moulding is possible to a clamping force of 3500 kN. Our R&D department would like to advise you if, and on which machine we could manufacture your product.
For de finishing touch your product can be provided by, for example, your logo or a product name by tampon printing. Furthermore we can weld your products together by mirror welding or ultrasonic welding.