CN111037780A

CN111037780A - High-filling wood-plastic composite material rolling granulation device

Info

Publication number: CN111037780A
Application number: CN201911202431.5A
Authority: CN
Inventors: 曾广胜; 江太君; 陈一; 孟聪; 胡灿; 尹琛; 刘水长
Original assignee: Hunan University of Technology
Current assignee: Hunan University of Technology
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2020-04-21

Abstract

The utility model provides a high packing wood-plastic composite material roll extrusion prilling granulator, belongs to wood-plastic composite material processing technology field, including pay-off extruding means and roll extrusion granulation mechanism, pay-off extruding means sets up the place ahead on roll extrusion granulation mechanism, pay-off extruding means includes the extruder, and inside sets up the screw rod, roll extrusion granulation mechanism includes compression roller and pelletization roller. The invention utilizes a parallel double-screw extruder to carry out mixing extrusion, adopts double-roller extrusion granulation on the premise of not configuring a granulation die head, and realizes the rolling granulation of the high-filling wood-plastic composite material by means of the opening of the roller surface and an automatic ejection device. The device is suitable for preparing high-filling wood-plastic composite particles, so that the particles are uniform in texture, high in production efficiency, free of dust, low in water content, stable in quality and low in material oxidative degradation rate.

Description

High-filling wood-plastic composite material rolling granulation device

Technical Field

The invention relates to the technical field of wood-plastic composite material processing devices, in particular to a high-filling wood-plastic composite material rolling and granulating device.

Background

The wood-plastic composite material is a novel composite material which has the double performances of plastic processing performance and wood texture and is prepared by fully utilizing agricultural and forestry wastes and plastic reclaimed materials. The content of the plant fiber serving as a main raw material of the wood-plastic composite material is usually over 50 percent, and the addition of the high-content plant fiber changes the rheological behavior of a resin matrix, increases the viscosity, deteriorates the fluidity and is difficult to process. The content of the plant fiber of the wood-plastic composite material for producing the section is usually as high as 60%, and the conventional process is mainly characterized in that the plant fiber is subjected to blending plasticization by a parallel double-screw extruder and then is crushed by a fan to form a crushed material and the crushed material is used for producing the section. However, the process can cause serious dust loss, seriously affect the production environment and harm the health of production personnel. The wood-plastic composite particles with uniform particles and low ash content are produced in a granulation mode, dust in the production process is reduced, the stability and uniformity of particle feeding in the production process of sectional materials are improved, and the production efficiency and the yield of products are improved. However, the water content of the plant fiber is usually as high as 10%, the drying cost of the plant fiber is too high through heating equipment, and the plant fiber is usually directly used, so that the extrusion instability phenomenon of the wood-plastic composite material is generated due to the overweight of water in the extrusion granulation process, the extruded material strips are broken irregularly, and even the material spraying phenomenon is prevented.

Disclosure of Invention

The invention provides a rolling granulation device for a high-filling wood-plastic composite material, aiming at the problems that the high-filling wood-plastic composite material is poor in flowability, material strips are easy to break in the extrusion granulation process and the material is sprayed.

In order to achieve the purpose, the application is realized by the following technical scheme:

the utility model provides a high packing wood-plastic composite material roll extrusion prilling granulator, includes feeding extrusion mechanism and roll extrusion granulation mechanism, feeding extrusion mechanism sets up the last the place ahead at roll granulation mechanism, feeding extrusion mechanism includes the extruder, and inside sets up the screw rod, roll extrusion mechanism includes compression roller and pelletization roller.

Preferably, the head of the extruder is of an open structure.

Preferably, the compression roller and the granulating roller are tangent and synchronously move towards each other at a constant speed.

Preferably, the roller surface of the granulating roller is provided with a plurality of granulating holes, and the granulating holes are cylindrical.

Preferably, the inside of the granulating hole is sequentially provided with a limiting shoulder and a piston.

Preferably, the piston is connected with a positioning rod, and the positioning rod penetrates through the limiting shoulder to be connected with a limiting nut.

Preferably, a spring is fixedly connected between the piston and the limiting shoulder.

The invention utilizes a parallel double-screw extruder to carry out mixing extrusion, adopts double-roller extrusion granulation on the premise of not configuring a granulation die head, and realizes the rolling granulation of the high-filling wood-plastic composite material by means of the opening of the roller surface and an automatic ejection device. The device is suitable for preparing high-filling wood-plastic composite particles, so that the particles are uniform in texture, high in production efficiency, free of dust, low in water content, stable in quality and low in material oxidative degradation rate.

Drawings

FIG. 1 is a schematic structural view of a rolling and granulating device for high-filling wood-plastic composite materials;

fig. 2 is a schematic view of the structure of the granulating roll of the present invention.

1. An extruder; 2. a screw; 3. a compression roller; 4. a granulating roller; 5. granulating holes; 6. a limiting shoulder; 7. a piston; 8. a spring; 9. positioning a rod; 10. and a limiting nut.

Detailed Description

The invention is further illustrated by the following specific examples. The starting materials and methods employed in the examples of the present invention are those conventionally available in the market and conventionally used in the art, unless otherwise specified.

Example 1

As shown in fig. 1 and 2, the rolling and granulating device for the high-filling wood-plastic composite material comprises an extruder 1, a screw rod 2, a compression roller 3, a granulating roller 4, a granulating hole 5, a limiting shoulder 6, a piston 7, a spring 8, a positioning rod 9 and a limiting nut 10. The extruder 1 and the screw 2 form a feeding extrusion mechanism, the compression roller 3 and the granulating roller 4 form a rolling granulating mechanism, and the feeding extrusion mechanism is arranged in the upper front of the rolling granulating mechanism.

The head of the extruder 1 is of an open structure. The compression roller 3 and the granulating roller 4 are tangent and synchronously move in opposite directions at a constant speed; 4 roll surfaces of pelletization roller set up 5 holes of a plurality of pelletization, and pelletization hole 5 is cylindrical, and the inside in pelletization hole 5 sets gradually spacing shoulder 6 and piston 7, and piston 7 links to each other with locating lever 9, and locating lever 9 passes spacing shoulder 6 links to each other with stop nut 10, and spring 8 is fixed in between piston 7 and the spacing shoulder 6.

Example 2

The embodiment discloses the operating principle of a high-filling wood-plastic composite material rolling and granulating device:

after the high-filling wood-plastic composite material is mixed by the extruder 1, the composite material melt enters the V-shaped space between the compression roller 3 and the granulating roller 4 under the conveying action of the screw rod 2, and most of moisture in the melt can be naturally volatilized due to the open structure.

Under the extrusion action of the compression roller 3 and the granulating roller 4, the composite material melt is extruded into the piston 7 in the granulating hole 5, so that the piston 7 in the granulating hole 5 pushes the spring 8 to move inwards, and the material enters the granulating hole 5.

With the placement of the granulating roller 4, when the granulating hole 5 exceeds the extrusion of the press roller 3, the piston 7 pushes the melt in the granulating hole 5 outwards under the action of the spring 8, so that the melt particles are separated from the granulating hole 5, and the composite material particles can be packaged and put in storage after being naturally cooled.

In the embodiment, a parallel double-screw extruder is used for mixing and extruding, double-roller extrusion granulation is adopted on the premise of not configuring a granulation die head, and rolling granulation of the high-filling wood-plastic composite material is realized by means of the opening of the roller surface and an automatic ejection device. The device is suitable for preparing high-filling wood-plastic composite particles, so that the particles are uniform in texture, high in production efficiency, free of dust, low in water content, stable in quality and low in material oxidative degradation rate.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims

1. The utility model provides a high packing wood-plastic composite material roll extrusion prilling granulator, includes feeding extrusion mechanism and roll extrusion granulation mechanism, its characterized in that, feeding extrusion mechanism sets up the place ahead in last of roll extrusion granulation mechanism, feeding extrusion mechanism includes the extruder, and inside sets up the screw rod, roll extrusion granulation mechanism includes compression roller and pelletization roller.

2. The roll granulation apparatus as claimed in claim 1, wherein the head of the extruder is of an open structure.

3. The roll granulation device according to claim 1, wherein the compression roller and the granulation roller are tangential and move synchronously in opposite directions at a constant speed.

4. The roll granulation device according to claim 1 or 3, wherein the surface of the granulation roller is provided with a plurality of granulation holes, and the granulation holes are cylindrical.

5. The roll granulation apparatus as claimed in claim 4, wherein a stopper shoulder and a piston are sequentially disposed inside the granulation hole.

6. The roll granulation apparatus as claimed in claim 5, wherein the piston is connected to a positioning rod, and the positioning rod passes through the position-limiting shoulder and is connected to a position-limiting nut.

7. The roll granulation apparatus as claimed in claim 5, wherein a spring is fixedly connected between the piston and the stop shoulder.