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A Special Screw Element For XPS Foam Board Extruder

Nov 21, 2018

Parallel twin screw has many applications, such as filling, blending, modification, reinforcement, devolatilization of chlorinated polypropylene and superabsorbent resin, extrusion of degradable masterbatch, polyamide polycondensation and polyurethane addition reaction, granulation of carbon powder and magnetic powder, production of insulating materials for cables and sheaths, etc.

Today, let's talk about parallel twin screw elements for XPS foaming extrusion. The extrusion process of XPS foam board is that the material entering the barrel must be melted by heat and melted into a melting state, then foaming agent is added to mix evenly, then pressure is built and extruded. The bubble and bulk density of our finished products are basically determined by the arrangement and mixing effect of the screw. The better the mixing, the more uniform the cell, the lower the yield. On the contrary, the worse the mixing, the different the cell size, the lower the thermal conductivity. At the same time, the wear of the feed section is very large, and some particles that are not completely melted are directly worn. In some cases, components need to be replaced in 3 months. Some foaming agents and water are injected, the materials produce acid, and corrosion is also very serious.

Kalshine has been experimentation for years. The experience of mass production is summarized. Finally, a series of screw elements have been developed for different situations. We improved the performance of threaded components, making it more suitable for high pressure environments. At the same time, we have raised some precision requirements, so that the problems can be improved more accurately at the same time. We are very willing to make an exclusive and applicable scheme for you and your twin screw extruder. Welcome your consultation.

FROM: www.kalshine.com