A polymer melt calculus enhanced heat transfer and mixing plastic extruder

Abstract

The invention discloses a calculus-reinforced heat transfer and plasticizing mixer-extruder for a polymer melt. The mixer-extruder mainly comprises a charging and plasticizing part, a heating and cooling part, a control system and a transmission system, wherein torsional dowels are arranged on a screw or a barrel of the charging and plasticizing part; each torsional dowel consists of two parts, i.e. a torsional section and a mounting section; four curved surfaces which are upwards spiral and are gradually twisted for 90 degrees are arranged on the lateral surface of the torsional section of each torsional dowel; the length of each torsional section does not exceed the depth of a spiral groove in the mounting position of the torsional dowel; the mounting section of each torsional dowel is inserted into a shaft of the corresponding screw or the corresponding barrel, and is provided with an anti-rotation structure. According to the extruder, the shortcomings of heat transfer of conventional dowels and screws are compensated; a forced convection mode is adopted, so that the transfer of heat in materials is reinforced, and the heat transfer is reinforced; in addition, the materials are separated, overturned and collected for many times, so that the materials can move axially and radially to reinforce mixing and enhance a mixing effect; moreover, the extruder can be combined with multiple structures, and is convenient to machine and manufacture and easy to maintain.

Description

technical field [0001] The invention relates to a plastic extrusion molding device capable of enhancing heat transfer and mixing and plasticizing, in particular to a polymer melt calculus enhanced heat transfer and mixing and plasticizing extruder, which belongs to the field of polymer material molding machinery . Background technique [0002] The extruder is one of the main equipment in the plastic processing industry. It is mainly composed of a feeding and plasticizing system, a transmission system, a heating and cooling system, and a control system. Among them, the screw and barrel are the key components of the extruder. The screw rotates at a certain speed in the heated barrel. Its main function is to melt, plasticize, mix and compress solid plastic particles or powder, so that the polymer melt can be extruded from the molding head. Get finished or semi-finished products. The plasticizing effect of the screw determines the performance of the whole extruder. The heat tr...

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Problems solved by technology

However, the pins are generally cylindrical, square or diamond-shaped, and the heat transfer effect is not very obvious.

[0005] In the patent (patent number: 201010512626), a kind of enhanced heat transfer and mixing extruder is mentioned. There is a rolling body between the screw and the barrel of the feeding and plasticizing part of the extruder, and the rolling body follows 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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