CN110900890B

CN110900890B - High-speed film recovery granulating device

Info

Publication number: CN110900890B
Application number: CN201911094843.1A
Authority: CN
Inventors: 曾广胜; 江太君; 尹琛; 孟聪; 陈一; 胡灿; 刘水长
Original assignee: Hunan University of Technology
Current assignee: Hunan University of Technology
Priority date: 2019-11-11
Filing date: 2019-11-11
Publication date: 2021-06-29
Anticipated expiration: 2039-11-11
Also published as: CN110900890A

Abstract

The invention relates to the technical field of film recovery, and discloses a high-speed film recovery granulating device which comprises a heating hobbing cutter for cutting a film and a granulating tower for receiving a film material cut by the hobbing cutter, wherein the granulating tower is provided with a discharge end, the hobbing cutter comprises a roller and cutter teeth arranged on the roller, a spiral groove extending along the height direction of the granulating tower is formed in the granulating tower, the tail end of the spiral groove is the discharge end of the granulating tower, and high-temperature gas is introduced into the granulating tower to enable the film material to enter along the initial end of the spiral groove and finally be sprayed out from the discharge end. The characteristics of small thickness and easy shrinkage and curling into lumps when being heated of the thin film plastic are utilized, the thin film plastic is sliced by the high-temperature hob, the thin film waste strips which are shrunk and curled when being heated are prepared into plastic particles with uniform particles and compact texture by high-temperature gas, the mechanical property of the particle material is kept good, the processing efficiency is high, and the application range of the material is wide.

Description

High-speed film recovery granulating device

Technical Field

The invention relates to the technical field of film recovery, in particular to a high-speed film recovery and granulation device.

Background

The plastic film is the product with the largest output and the most extensive application in the application of plastic products, and the application field of the plastic film not only relates to the industry, but also relates to the daily life field. The traditional plastic film forming process comprises a bubble film blowing method, a tape casting method, a multi-roller calendering method, a film laminating method and the like, however, a trimming process is carried out in all the film processing and forming processes, the edge part in the film processing process is cut and removed, and a lot of leftover bits and pieces are generated. Compared with the waste materials generated by injection molding and other molding modes, the waste materials have higher material purity, low material thermal degradation procedure and less mechanical property loss, so the waste materials can be recycled and reused as high-end materials and have very important application value.

The waste film waste is low in apparent density due to the fact that the film scraps are usually thin films, the waste film waste is difficult to process by adopting the traditional crushing and re-extrusion granulation process, the process is low in efficiency of the material with low apparent density, the processing cost is high, the thermal history of the plastic can be increased due to multiple high-temperature treatments, the thermal degradation risk is increased, and the physical properties of the material are reduced. Therefore, a process and a device suitable for rapidly and efficiently recovering and granulating waste scraps in the film processing process are urgently needed to be developed, so that the thermal processing process is reduced as much as possible, the performance of the material is ensured, and high-end regenerated film plastic particles very close to the physical performance of a new material are prepared.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a high-speed film recycling and granulating device for preparing plastic granules with uniform granules, dense texture and good physical properties.

The purpose of the invention is realized by the following technical scheme:

the utility model provides a prilling granulator is retrieved to high-speed film, includes the heating form hobbing cutter that is used for cutting the film, receives the pelletization tower of being cut the film material by the hobbing cutter, and the pelletization tower has the discharge end, and the hobbing cutter includes the roller and locates the cutter tooth on the roller, sets up the helicla flute that extends along pelletization tower direction of height in the pelletization tower, and the helicla flute end is pelletization tower discharge end, lets in high-temperature gas in the pelletization tower and makes the film material follow the helicla flute top and get into and finally spout from the discharge end.

Furthermore, the discharge end of the granulating tower is connected with a discharge pipe, the tail end of the discharge pipe is provided with a filter screen, and the discharge pipe is provided with a discharge hole on the wall of the pipe section between the filter screen and the granulating tower.

Furthermore, a vibration cooling screen is arranged below the discharge hole.

Still further, the end of the vibration cooling screen is connected with a discharge hole.

Furthermore, the cutter teeth are uniformly arranged in the circumferential direction of the roller, and the length of each cutter tooth is equal to that of the roller.

Still further, include the protective frame that covers the area that the hobbing cutter is located, protective frame has the film material export.

And a material conveying pipe is arranged between the film material outlet of the protective frame and the spiral groove starting end of the granulating tower, the material conveying pipe is also provided with a through hole for introducing high-temperature gas, and the high-temperature gas sequentially passes through the film material outlet and the spiral groove starting end of the protective frame after being input into the material conveying pipe.

Furthermore, a supporting table convenient for efficient cutting is arranged at the position where the film is cut by the hob.

Further, the film is flatly conveyed to the supporting table through a rubber guide roller.

Furthermore, the cutting edge of the hob cutter teeth is made of teflon.

Compared with the prior art, the invention has the following beneficial effects:

the characteristics of small thickness and easy shrinkage and curling into lumps when being heated of the thin film plastic are utilized, the thin film plastic is sliced by the high-temperature hob, the thin film waste strips which are shrunk and curled when being heated are prepared into plastic particles with uniform particles and compact texture by high-temperature gas, the mechanical property of the particle material is kept good, the processing efficiency is high, and the application range of the material is wide.

Drawings

Fig. 1 is a schematic structural view of a high-speed film recycling and granulating apparatus according to embodiment 1.

Detailed Description

The present invention will be further described with reference to the following detailed description, wherein the drawings are provided for illustrative purposes only and are not intended to be limiting; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

Example 1

As shown in figure 1, the high-speed film recycling and granulating device comprises a heating hobbing cutter for cutting a film, a granulating tower 2 for receiving a film material cut by the hobbing cutter and a discharge pipe 3 connected to the discharge end of the granulating tower, wherein the hobbing cutter comprises a roller 11 and cutter teeth 12 arranged on the roller, the cutter teeth 12 are uniformly arranged in the circumferential direction of the roller 11, the length of each cutter tooth is equal to that of the roller, the tip of each cutter tooth is a cutting edge 13, the cutting edge 13 is made of Teflon which is resistant to temperature and does not adhere to plastics, the hobbing cutter 11 needs to be heated when cutting the film, the heating temperature is 80-140 ℃, preferably 100 ℃, the characteristic that the film is easily shrunk and curled into a lump when being heated is fully utilized, the film cut by the high-temperature cutting edge is rapidly shrunk into small plastic blocks, the cutting direction of the cutting edge 13 is the same as the rotating direction of the roller 11, and the rotating direction of the roller.

The regional fender frame 4 that covers in hobbing cutter place to prevent to be heated the plastics fritter that forms and splash, simultaneously also be in considering for production safety, fender frame 4 has film material entry 41 and export 42, be equipped with the brace table 5 of the high-efficient cutting of being convenient for in the position department of hobbing cutter cutting film, film material entry 41 sets up in brace table 5 surface department promptly, the film levels through rubber deflector roll 6 and carries to brace table 5 on and enter fender frame 4, at brace table corner, the antedisplacement of film material is unsettled, cutting edge 13 is at rotatory in-process with the film material section and plasticize rapidly and become the fritter. The film material outlet 42 is located below the hob, and the formed plastic small blocks obliquely fall into the film material outlet 42 under the dual actions of gravity and the cutting action force of the blade, and then enter the granulation tower 2 for further grinding.

The granulation tower 2 is of a cylindrical structure, a spiral groove 21 extending along the height direction of the granulation tower is formed in the granulation tower 2, the tail end of the spiral groove 21 is the discharge end of the granulation tower, and high-temperature gas is introduced into the granulation tower 2 to enable the small plastic blocks to enter along the initial end of the spiral groove 21 and finally to be sprayed out of the discharge pipe 3. The small plastic blocks are continuously softened under the action of high-temperature gas and continuously collide and roll with the wall surface of the spiral groove 21, and the small plastic blocks are quickly converted into plastic particles with uniform texture.

In order to form a good discharge circulation of the plastic particles, a filter screen 7 may be disposed at the end of the discharge pipe 3, and the discharge pipe 3 has a discharge port 31 formed on the wall of the pipe section between the filter screen 7 and the granulation tower 2, the discharge port 31 being disposed downward, so that the plastic particles fall out from the discharge port under the action of gravity, and the high-temperature gas is discharged through the filter screen 7 in the discharge pipe 3.

The vibrating cooling screen 8 is arranged below the discharge port 31 to timely cool the plastic particles so as to reduce the heating process as much as possible and ensure the performance of the material, the discharge port 81 is connected to the end part of the vibrating cooling screen 8, the plastic particles falling onto the vibrating cooling screen 8 gradually move to the discharge port 81 along with rhythmic vibration, and in the process, the plastic particles can be completely cooled until entering the discharge port and being packaged and put in storage.

In order to make the plastic small blocks smoothly enter the granulating tower 2, a material conveying pipe 9 is further arranged between the film material outlet 42 of the protective frame and the beginning end of the spiral groove 21 of the granulating tower, the material conveying pipe 9 is further provided with a through hole 91 for introducing high-temperature gas (namely, the material conveying pipe is provided with three gaps, one is communicated with the beginning end of the spiral groove 21 of the granulating tower, the other is communicated with the film material outlet and the other is a high-temperature gas inlet), and after the high-temperature gas is input into the material conveying pipe 9, the plastic small blocks are smoothly blown into the spiral groove through the film material outlet 42 and the beginning end of the spiral groove 21 of the protective frame.

In addition, the high-temperature gas discharge end of the discharge pipe 3 can be communicated with the through hole 91 of the material conveying pipe for introducing high-temperature gas through a pipeline, so that the high-temperature gas can be recycled, and the heat energy can be saved.

The high-temperature gas is high-temperature air.

The recovery prilling granulator of this embodiment simple structure makes the plastics fritter "polish" into the even granule of size rapidly under the striking effect of high temperature and with the cell wall through the helicla flute design of granulation tower, and sweeps by high temperature gas from the plastics fritter to the finished in-process of plastic granules, and the pelletization process is very fast, and plastic granules hot working process is short, can effectively remain its physical properties.

It should be understood that the above examples are only for clearly illustrating the technical solutions of the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A high-speed film recycling and granulating device is characterized by comprising a heating hobbing cutter for cutting a film and a granulating tower for receiving a film material cut by the hobbing cutter, wherein the granulating tower is provided with a discharge end, the hobbing cutter comprises a roller and cutter teeth arranged on the roller, a spiral groove extending along the height direction of the granulating tower is formed in the granulating tower, the tail end of the spiral groove is the discharge end of the granulating tower, and high-temperature gas is introduced into the granulating tower to enable the film material to enter along the initial end of the spiral groove and finally be sprayed out from the discharge end;

a supporting table convenient for efficient cutting is further arranged at the position where the film is cut by the hob, and the film is conveyed to the supporting table smoothly through a rubber guide roller;

the cutting edge of the hob cutter tooth is made of teflon.

2. The high-speed film recycling and granulating apparatus of claim 1, wherein the discharge pipe is connected to the discharge end of the granulating tower, a filter screen is arranged at the tail end of the discharge pipe, and the discharge pipe is provided with a discharge port on the wall of the pipe section between the filter screen and the granulating tower.

3. The high-speed film recycling granulation apparatus as claimed in claim 2, wherein a vibration cooling screen is provided below the discharge port.

4. A high speed film recycling granulator according to claim 3 wherein the vibrating cooling screen is terminated by a discharge outlet.

5. A high speed film recycling granulator according to claim 1 wherein the cutter teeth are uniformly arranged around the circumference of the roller, each cutter tooth having a length equal to the length of the roller.

6. The high speed film recycling pelletizer of claim 5, further comprising a protective frame covering the area where the roller cutters are located, the protective frame having a film material outlet.

7. A high-speed film recycling and granulating apparatus as claimed in claim 6, wherein a material conveying pipe is provided between the film material outlet of the protective frame and the spiral groove start end of the granulating tower, the material conveying pipe further has a through hole for introducing high-temperature gas, and the high-temperature gas is introduced into the material conveying pipe and then sequentially passes through the film material outlet of the protective frame and the spiral groove start end.