The structure of the equipment for the production of PVC pipe extrusion cylinder inner sleeve
　　Equipment for the production of PVC pipe extrusion cylinder is set according to the surface structure can be divided into cylindrical, cone and shoulder in cylindrical; According to the integrity can be divided into the integral, modular and split combined; According to the inner cavity can be divided into round, oblate and shape.
　　Cylinder bushing processing is convenient, easy to measure size, after the work parts wear can be diverted to use. But when the replacement set more difficult. When change the lining color carefully to find good assembly location. And change of operation for a long time. On the small and medium-sized extrusion machine PVC pipe with this kind of bushing. In recent years in the large extrusion machine began to use such bushing.
　　Conical liner cone is not easy to processing, when the length exceeds lm cone straightness is not easy to guarantee. The size of each point is not easy to check. But replacing within the set time is short.
　　With convex sets bushing is basically the same as the cylinder bushing. PVC pipe hot charging operation don't have to pinpoint the location in advance. Rely on convex automatic alignment.
　　Lined with sets of inner hole on both ends to make cone, to help the smoothly during extrusion ingot casting and gasket to one container. And centering role. Make the mold core in a tight squeeze tube in the back. Can accurately in the center line of the extrusion.