Porous die of extruder

Abstract

The invention discloses a porous die of an extruder. The porous die comprises a die body, a main runner, an arc-shaped splitter plate and extrusion holes, the main runner is formed in the upper side of the die body, the arc-shaped splitter plate is arranged at the bottom end of the main runner, an outer arc surface of the arc-shaped splitter plate is connected with the bottom end of the main runner, multiple sets of extrusion holes are formed in an inner arc surface of the arc-shaped splitter plate, and each group of extrusion holes communicate with the main runner through the arc-shaped splitter plate. The arc-shaped splitter plate is arranged in the die body, under the effect of the outer arc surface of the arc-shaped splitter plate, the material flow entering from the main runner is redistributed in a cavity of a machine head and uniformly enters all the extrusion holes, the path of the extrusion hole at the center of the die body is prolonged, the paths of the extrusion holes awayfrom the center of the die body are reduced, the pressure loss of the material flow in the central extrusion hole is increased, the pressure of the central material flow is reduced, the material flowaway from two ends of the center of the die body is increased, and the flow speed and the flow of the material flow extruded in each extrusion hole are kept consistent.

Description

Technical field: [0001] The patent of the present invention relates to an extruder die, and more specifically, relates to a polymer extruder die. Background technique: [0002] Today's polymer extruder is basically composed of extruder, head, die and other parts. The polymer material becomes a polymer in a molten state after being conveyed, heated and mixed in the extruder. Melt, the polymer melt in the molten state is gradually pushed towards the direction of the machine head under the rotation of the screw in the extruder host, and is extruded from the extrusion hole on the die of the extruder under the action of pressure , the extruded material strips are cooled and pelletized to become the finished pellets required for production. Since the movement state of the polymer melt in the die cavity is close to the pressure flow state, when passing through the multi-hole die, the melt material will be distributed to each extrusion hole. The extrusion hole at the center will g...

AI Technical Summary

Problems solved by technology

[0003] When the existing polymer extruder extrudes multiple strips at the same time through the multi-hole die, the extrusion hole far away from the center has a small material flow rate and lacks the corresponding material flow pressure, resulting in the extrusion of the extrusion hole. The flow rate of the material flow is lower than that of the center. The flow rate of different extrusion holes is different, so that the size of the formed material is not the same. When the finished product is drawn, some strands will be stretched or even broken, while some strands will be stretched. The strands will be relatively loose, and the size deviation of the cross-sectional size of the final finished product will be serious, and even waste will appear, which will affect the normal production process.

Images