Profile: Peak Plastics Ltd. specializes in manufacturing pen trays, feet and height adjusters, end caps and cable ports. We also offer services like injection plastic moulding and bespoke moulding. In our injection molding the resin is usually in pellet or granule form, and is melted by heat and shearing forces shortly before being injected into the mould. Resin pellets are poured into the feed hopper, a large open bottomed container, which feeds the granules down to the screw. The screw is rotated by a motor, feeding pellets up the screw's grooves. The depth of the screw flights decreases towards the end of the screw nearest the mould, compressing the heated plastic.