Polymer melt calculus heat transfer enhancement and mixing plasticization extruder

Abstract

The invention discloses a polymer melt calculus heat transfer enhancement and mixing plasticization extruder. The polymer melt calculus heat transfer enhancement and mixing plasticization extruder mainly comprises a charged material plasticizing part, a heating and cooling part, a control system, a drive system and the like; the structures and the connection modes of the charged material plasticizing part, the heating and cooling part, the control system and the drive system are as the same as those of a common extruder; a screw rod of the charged material plasticizing part is provided with a mixing section which is provided with axial cutting edges (or forms an angle with the axial direction) with n equal divisions along the peripheral direction; adjacent cutting edges are parallel mutually; 90-degree torsional curve surfaces are additionally arranged in inner surfaces among the cutting edges, namely distributary torsion convergence sections. In the extruder provided by the invention, polymer melts rotate along with screws as well as twist by 90 degrees along the inner surfaces of the cutting grooves under the relative motion of the screws and machine barrels, so that the heat of the machine barrels is transmitted successively via each surface of the melts to enforce convection, and the heat transfer intensification and plasticization effects are achieved; additionally, the melts in the cutting grooves are subjected to distributary torsion convergence, and are mixed fully, so that the mixing effect is improved.

Description

technical field [0001] The invention relates to a plastic extrusion molding device, in particular to an extruder capable of enhancing heat transfer and mixing and plasticizing. Background technique [0002] Extruder is one of the main equipment in plastic processing industry. The extruder host is mainly composed of feeding and plasticizing system, transmission system, heating and cooling system, control system and other parts. Among them, the screw and barrel are the key components of the extruder. The screw rotates in the heated barrel, the main function is to melt and mix solid plastic particles or powder, and the polymer melt is extruded into the molding head to form and shape to obtain finished products or semi-finished products. The plasticizing effect of the screw determines the performance of the whole extruder, but the heat transfer and mixing effect of the conventional extruder is not good, especially when the screw groove is deep. [0003] Among the new screws o...

AI Technical Summary

Problems solved by technology

but it doesn't mix very well

[0005] In the patent (Patent No.: 201010512626), an enhanced heat transfer and mixing extruder is mentioned. There are rolling elements between the screw and the barrel in the feeding and plasticizing part of the extruder, and the rolling elements follow the screw in the barrel. Rotating inside while freely rolling in the corresponding groove can effectively improve the heat transfer and plasticizing effect of the extruder, but for the convenience of installation, the barrel needs to be split

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