Pressure stabilizing device for highly-filled wood-plastic composite material pelletizing mould head

A wood-plastic composite material and granulation die head technology, which is applied in the field of high-fill wood-plastic composite material granulation die head voltage stabilizing device, can solve the problems of unstable head pressure and poor fluidity, and achieve the goal of ensuring the pressure of the head Effect

Inactive Publication Date: 2020-03-24
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of poor fluidity of high-filling wood-plastic materials and unstable head pressure caused by water weight in the granulation process, the invention provides a pressure stabilizing device suitable for granulation dies of high-filling wood-plastic composite materials

Method used

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  • Pressure stabilizing device for highly-filled wood-plastic composite material pelletizing mould head

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Such as figure 1 As shown, the high-filling wood-plastic composite material granulation die pressure stabilizing device includes a barrel 1, a screw 2, a flange 3, a transition body 4, a storage chamber 5, a pressing piston 6, a pressing rod 7, a hydraulic cylinder 8, Pelletizing die head 9, converging runner 10, discharge port 11.

[0020] The screw 2 is set inside the barrel 1, and the end of the barrel 1 is connected to the transition body 4 through the flange 3; the transition body 4 is provided with a conical storage chamber 5, and a dynamic movable compression chamber is provided on the side of the storage chamber 5. The piston 6 and the compression piston 6 are connected to the hydraulic cylinder 8 through the compression rod 7, and the hydraulic cylinder 8 maintains a stable pressure on the contact surface of the compression piston 6 and the composite material melt through dynamic pressure.

[0021] The pelletizing die head 9 is provided with a tapered convergi...

Embodiment 2

[0023] This example discloses the working principle of the high-filling wood-plastic composite material granulation die head voltage stabilizing device:

[0024] When the highly filled wood-plastic composite material melt containing water vapor enters the storage chamber 5 in the transition body 4 under the mixing and conveying action of the screw 2, it is dynamically released by the compression piston 6 in the storage chamber 5, To ensure the stability of the melt pressure in the material storage chamber 5, as the melt is continuously conveyed forward, the material is compacted. The pressure caused by the periodic movement of the screw 2 is balanced with the dynamic pressure of the compression piston 6 in the material storage chamber 5, so that the pressure of the material entering the pelletizing die 9 is stable, and the strip can be extruded normally and stably.

[0025] The present invention aims at the problem of heavy moisture and unstable die head pressure in the granul...

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Abstract

The invention discloses a pressure stabilizing device for a highly-filled wood-plastic composite material pelletizing mould head, and belongs to the technical field of wood-plastic composite materialprocessing devices. The pressure stabilizing device comprises an external pressurizing device which is arranged on a transition body, wherein one side of the transition body is connected with a screwfeeding mechanism, and the other side of the transition body is connected with a pelletizing mechanism. In order to solve the problems that water content is high and mould head pressure is unstable ina wood-plastic composite material pelletizing process, the transition body is additionally arranged between a parallel dual-screw discharge hole and the pelletizing mould head, and the external pressurizing device is additionally arranged in the transition body, so that stability of machine head pressure is guaranteed by dynamically regulating pressure of a composite material melt in a transitionbody storage room, and tie bar extrusion smoothness is guaranteed. The pelletizing mould head is suitable for extruding and pelletizing of the wood-plastic composite material with wood powder water content being 10% and filling lower than 60%.

Description

technical field [0001] The invention relates to the technical field of processing devices for wood-plastic composite materials, and more specifically, relates to a high-fill wood-plastic composite material granulation die pressure stabilizing device. Background technique [0002] Wood-plastic material is a new type of composite material that makes full use of agricultural and forestry waste and plastic recycled materials to prepare a dual performance of plastic processing performance and wood texture. As the main raw material of wood-plastic materials, the plant fiber content is usually as high as more than 50%. The addition of high-content plant fiber changes the rheological behavior of the resin matrix, increases the viscosity, deteriorates the fluidity, and makes processing difficult. For the production of wood-plastic materials for profiles, the plant fiber content is usually as high as 60%. The traditional process is mostly blended and plasticized by parallel twin-screw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B9/06B29C48/40B29C48/50
CPCB29B9/06B29C48/40B29C48/50
Inventor 曾广胜江太君陈一孟聪胡灿尹琛刘水长
Owner HUNAN UNIV OF TECH
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