Contraposition spiral short screw extruder

Abstract

The invention discloses a contraposition spiral short screw extruder. The contraposition spiral short screw extruder comprises a first melt conveying passage and a second melt conveying passage which are oppositely arranged; the first melt conveying passage is formed by a first conveying mechanism; the second melt conveying passage is formed by a second conveying mechanism; the first conveying mechanism comprises a first machine barrel (1), a first screw (2) and a first right baffle plate (21); the second conveying mechanism comprises a second machine barrel (4), a second screw (7) and a second right baffle plate (23); the first conveying mechanism and the second conveying mechanism are arranged on the two sides of a gear case (11) coaxially and oppositely; the contraposition spiral short screw extruder further comprises a sleeve (3) which is fixedly arranged between the first right baffle plate (21) and the second right baffle plate (23); the sleeve (3) is internally provided with a material mixing screw (8) and an injection screw (9) in a rotary match manner; and communication holes are formed in positions, corresponding to the screw body central hole tail ends of the first screw (2) and the second screw (7), of the sleeve (3). According to the contraposition spiral short screw extruder, on the premise that the length of the screws is not increased, the small extruder capable of double material inputting is designed, and the plasticizing efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of extruders, in particular to an opposed helical short screw extruder. Background technique [0002] Screw extruder is an important equipment for plastic processing, and the screw is its core component. The length of the screw determines the length of the extruder. In the extruder, the barrel / screw has three functions: one is the feeding and conveying function, that is, the feeding section; the other is the plasticizing function, which melts the pellets into a plastic melt, that is, the plasticizing section; the third is stable extrusion The extrusion section must have a melt metering effect. [0003] If the existing screw extruder wants to obtain good-quality injection molding products, the screw must be long enough so that it has enough mixing length to fully melt the thermoplastic resin material. Therefore, the extruder tends to be larger. In recent years, the delivery cycle of products has been shorte...

AI Technical Summary

Problems solved by technology

[0003] If the existing screw extruder wants to obtain good quality injection molding products, the screw must be long enough so that it has enough mixing length to fully melt the thermoplastic resin material. Therefore, the extruder tends to be larger

In recent years, the delivery cycle of products has been shortened, and the plasticizing speed of the screw is required to be faster and faster, and many extruders have become unable to do what they want.

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