Plastic extrusion mold with high-heat-dissipation sizing sleeve

Abstract

The invention discloses a plastic extrusion mold with a high-heat-dissipation sizing sleeve, and belongs to the field of plastic molds. Through improvement of the interior of a conventional sizing sleeve, double-effect cooling can be carried out on the interior and the exterior of a pipe blank, and the deformation of the pipe blank can be effectively prevented; through creative adding of a cooling and sizing auxiliary part, air inflation and circulation of cooling water can be achieved, the cooling effect and the sizing effect are effectively improved, and a cooling and sizing plate on the cooling and sizing auxiliary part extends outwards by inflating compressed air so that the cooling and sizing plate can make contact with the interior of a pipe blank, the heat of the pipe blank is transferred to internal circulating water through heat transfer of a heat transfer piece in the cooling and sizing plate, the goal of effective cooling is achieved, efficient heat dissipation and cooling are achieved in cooperation with an original cooling mode of the sizing sleeve, the cooling and sizing plate makes contact with the pipe blank, and the appearance of the pipe blank can be effectively prevented from deformation.

Description

technical field [0001] The invention relates to the field of plastic molds, in particular to a plastic extrusion mold with a high heat dissipation calibrating sleeve. Background technique [0002] Plastic molds are tools that are matched with plastic molding machines in the plastic processing industry to give plastic products a complete configuration and precise dimensions. Due to the variety of plastics and processing methods, and the structures of plastic molding machines and plastic products, the types and structures of plastic molds are also varied. According to the different molding methods, the types of plastic processing molds corresponding to different process requirements can be divided, mainly including injection molding moulds, extrusion molding moulds, blister molding moulds, high-expansion polystyrene molding moulds, etc. [0003] Among them, the plastic extrusion die is a type of die used to form and produce continuous-shaped plastic products. Processing of p...

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Problems solved by technology

[0004] When the sizing sleeve is working, it mainly cools down through the external circulating water, while the inside is filled with compressed air through the mandrel to maintain a certain pressure to prevent the tube blank from collapsing and deforming, and the end is sealed with a rubber stopper. Sealing, which is enough for small-diameter round pipes, but for special-shaped pipes such as slightly larger-diameter square pipes, it is obviously impossible to achieve a good shaping effect only by filling compressed air, and it can only Only cooling the outside of the tube billet, the effect of cooling and shaping is not good

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