Polymer melt shear vibration extrusion molding device

Abstract

The invention provides a polymer melt shear vibration extrusion molding device which comprises an extruding machine 13, an extrusion head 1 connected with the extruding machine through a flange plate, a mouth mould 12, a stock mould 14, a cooling water tank 15, a traction device 16 and a cutting device 17, and is characterized by further comprising a crank connecting rod shear vibration system 18 and a melt runner vibration chamber 2, wherein the crank connecting rod shear vibration system 18 is arranged above the extrusion head 1; the melt runner vibration chamber 2 is arranged inside the extrusion head 1; the crank connecting rod shear vibration system is composed of a crank connecting rod mechanism and a reciprocating vibration rod 3; the reciprocating vibration rod 3 is positioned in a through hole 9 formed in the extrusion head 1; the through hole 9 is communicated with the melt runner vibration chamber 2. The device provided by the invention not only can simultaneously promote polymer molecule chain orientation, shish-kebab structure generation and polymer crystalline grain refinement, and improve mechanical property of products, but also can reduce extrusion resistance and improve production efficiency.

Description

technical field [0001] The invention belongs to the technical field of polymer extrusion molding processing devices, in particular to a crank-connecting rod type polymer melt shear vibration extrusion molding device. Background technique [0002] Polymer melt vibration molding processing technology refers to the technology of applying a vibration field during the molding process to affect the rheological properties and condensed state structure of polymer melt. This technology can not only effectively promote the disentanglement of polymer molecules, reduce the viscosity of the polymer melt, improve the fluidity of the melt, thereby improving the melt breakage during extrusion and the degree of polymer extrusion swelling, and improving the extrusion process. It can improve the yield and quality, and at the same time, it can refine the grain size of the extrudate and improve the thermal stability. [0003] At present, there have been some reports on the research on the proce...

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Problems solved by technology

However, ultrasonic vibration is not ideal in terms of improving the mechanical properties of products, and even in some cases the mechanical properties decline after a long time of ultrasonic treatment (Fridman M L Peshkovsky S L Vinogradov G V. The rheology of thermoplastics under conditions of spiral flow and vibrations on extrusion. Polym. Eng. Sci. 1981 21( 12): 755.)

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