Mandril-cooling device of wood-plastic extrusion die

Abstract

The invention discloses a mandril-cooling device of a wood-plastic extrusion die. The mandril-cooling device comprises a tail mandril, a front mandril, a water inlet pipe, screws, a water outlet pipe and a positioning pin, wherein the tail mandril comprises an outer cylinder, an inner mandril; and the inner mandril is arranged in the outer cylinder. The mandril-cooling device also comprises two sealing rings; the inner mandril is provided with two threaded holes; the right end of the inner mandril is provided with two concave circular truncated cones; the threaded holes are formed in the middle of the mandril; one sealing ring is arranged in each concave circular truncated cone; the water inlet pipe passes through an inner hole of each sealing ring and is connected with the threaded hole in a position close to the upper part of the inner mandril; the water outlet pipe passes through the inner hole of each sealing ring and is connected with the threaded hole formed in a position close to the lower part of the inner mandril; and the tail mandril is connected with the front mandril through the screws. The mandril-cooling device can be disassembled and assembled rapidly, has good sealing property and is free of leakage; water scale can be removed easily; and a machined product has high quality.

Description

technical field [0001] The invention relates to an extrusion die, in particular to a mandrel cooling device for a wood-plastic extrusion die. Background technique [0002] When the existing wood-plastic extrusion mold is cooling the tail mandrel, the structure adopted is to directly connect the water inlet pipe and the water outlet pipe with the inner mandrel through thread connection, and use screws to connect the tail mandrel with the front mandrel. Although this structure is simple in structure and easy to install, since the water inlet pipe and the water outlet pipe are connected to the inner mandrel through threaded connections, and there is a gap in the threaded connection, the cooling water in the water inlet pipe and the water outlet pipe often leaks and enters the mold. In the cavity, the quality of the extruded product is affected, and the cooling effect of the mandrel is affected. In severe cases, it needs to be disassembled for maintenance, and the maintenance is...

AI Technical Summary

Problems solved by technology

[0002] When the existing wood-plastic extrusion mold is cooling the tail mandrel, the structure adopted is to directly connect the water inlet pipe and the water outlet pipe with the inner mandrel through thread connection, and use screws to connect the tail mandrel with the front mandrel. Although this structure is simple in structure and easy to install, since the water inlet pipe and the water outlet pipe are connected to the inner mandrel through threaded connections, and there is a gap in the threaded connection, the cooling water in the water inlet pipe and the water outlet pipe often leaks and enters the mold. In the cavity, it affects the quality of the extruded product and the cooling effect of the mandrel. In severe cases, it needs to be disassembled for maintenance, and the maintenance is complicated and the workload is large.

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