Features: 1) Specialized equipment used for producing rigid and half-rigid PU filter end caps 2) Operation process: a) Raw materials are injected into moulds automatically b) The materials run along a pre-set locus after being agitated in the low-pressure reaction injection machine c) After inserting an element, the injected mould will be transferred into streamline products with mating fixtures d) Products ripen and harden into shape 3) Consists of a low-pressure reaction injection machine, automatic turntable and ring- shaped conveying line 4) Machine model N25 has an LCD touch screen, and man-machine interface utilizing a NC automatic turntable to complete material injection into the mould, with the turntable driven by a digital ETN200 double-axle servo-controller: a) Module design with integration of controller, actuator and operational panel b) Location with point-to-point method between two axles, clearance compensated through a slant line c) Huge resource for software-conducting operation and information memory d) Two axles utilize DC servo-motors with fully-closed circuit control system 5) Machine model LJ uses mechanical contouring method to finish material injection with an automatic turntable, which is driven by a mechanically-driven and speed- variable electromotor, and has a template below; such machine has the advantage of a low price, and is suitable for mass, uniform and simple production 6) Conveying line model X with speed-adjustable function for curing air-filters, is a kind of special auxiliary equipment for producing PU polyfoam products, moving in a smooth and reliable way. The baking channel of the line adopts electrical heating with evenly-distributed temperature.