Regranulation recovery device based on plastic film production

Abstract

The utility model discloses a regranulation recovery device based on plastic film production, which comprises a smelting machine and a pelletizer, a cold water tank and an air cooling box are sequentially arranged between the smelting machine and the pelletizer, and plastic filaments discharged from the outlet end of the smelting machine pass through the cold water tank, then enter the air cooling box and then enter the pelletizer to be pelletized. The cooling speed of the plastic filaments is increased through the cold water tank and the air cooling box, the problems that the occupied space is large and the cooling efficiency is low due to the fact that the distance between a smelting machine and a pelletizer needs to be lengthened for natural cooling at present are solved, and the re-pelletizing production efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of plastic film recycling technology, specifically relating to a re-granulation and recycling device based on plastic film production. Background Technology

[0002] During the production of plastic film, various factors such as equipment, processes, raw materials, and the environment inevitably lead to film breakage and waste film. Failure to recycle this waste film would result in significant waste. To save resources and reduce production costs, the waste film is recycled and processed using melting and granulation machines to produce plastic granules for reuse in production.

[0003] After the plastic film is melted in the melting machine, it is drawn into filaments and cut into small granules in the granulator. However, the strip (filament) plastic products that have just come out of the melting machine are at a high temperature and are difficult to cut in the granulator. At present, the only solution is to increase the distance between the melting machine and the granulator so that the plastic filaments can be cooled to a certain extent before being cut into granules. This method not only increases the floor space but also has a poor cooling effect, which affects the efficiency of re-granulation production. Utility Model Content

[0004] The purpose of this invention is to provide a re-granulation and recycling device based on plastic film production, which solves the problems of large space occupation and low efficiency in current production sites.

[0005] The technical solution adopted by this utility model is a plastic film production re-granulation and recycling device, which includes a melting machine and a granulator. A cold water tank and an air-cooling box are installed sequentially between the melting machine and the granulator. The plastic filaments coming out of the outlet of the melting machine pass through the cold water tank and enter the air-cooling box, and then enter the granulator to be granulated.

[0006] Preferably, the above-mentioned cold water tank is a rectangular tank with a length of 2.8-3.2m. The front end of the cold water tank is provided with an outlet and the rear end is provided with an inlet. The cold water tank is provided with a first guide roller and a second guide roller near the front end and the rear end, respectively. The distance between the first guide roller and the second guide roller and the bottom end of the cold water tank is 8-10cm. The middle of the cold water tank is provided with a support roller. The distance between the support roller and the bottom end of the cold water tank is 4-7cm. A pressure strip is provided above the support roller and flush with the top end of the cold water tank.

[0007] Preferably, the surfaces of the first guide roller and the second guide roller are provided with grooves in the circumferential direction, and the width of the grooves is greater than the diameter of the plastic filament; the idler roller is a smooth roller, and the idler roller is rotatably connected to the shaft of the idler roller.

[0008] Preferably, the air-cooled box includes an air-cooled trough and an air shroud. The air shroud is installed above the air-cooled trough and its top is connected to a cold air blower through a pipe. The air-cooled trough is an inverted cone shape with a water inlet at the bottom. The water inlet is connected to the rear end of a cold water tank through a pipe. A third guide roller and a fourth guide roller are respectively installed near the front and rear sides of the top of the air-cooled trough. The surfaces of the third guide roller and the fourth guide roller are provided with grooves in the circumferential direction. The width of the grooves is greater than the diameter of the plastic filaments.

[0009] Preferably, a slope transition plate is connected between the front end of the air-cooled tank and the rear end of the cold water tank, and the connection between the slope transition plate and the air-cooled tank and the cold water tank is rounded.

[0010] Preferably, a collection box is provided below the outlet of the granulator, a filter plate is provided in the middle of the collection box, and an opening is opened at the bottom to connect to the conveying pipe. The conveying pipe is connected to the conveying pump and the end of the conveying pipe is connected to the top of the silo.

[0011] Preferably, the upper part of the silo is cylindrical, the lower part is conical and has a discharge port, a valve is installed on the discharge port, an observation window is opened at the top of the side wall of the silo, and the upper outer side of the silo is covered with an opaque rubber layer.

[0012] Compared with the prior art, the beneficial effect of this utility model is that by installing a cold water tank and an air-cooled box between the melting machine and the granulator to accelerate the cooling speed of plastic filaments, it solves the problems of large space occupation and low cooling efficiency caused by the current need to extend the distance between the melting machine and the granulator for natural cooling, thereby improving the production efficiency of re-granulation. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the cold water tank structure. Detailed Implementation

[0015] The present invention will be further explained below with reference to the accompanying drawings to enable those skilled in the art to better understand it.

[0016] Example 1

[0017] like Figure 1-2 As shown, the plastic film-based re-granulation and recycling device includes a melting mill 1 and a granulator 2. A cold water tank 3 and an air-cooling box 4 are sequentially installed between the melting mill 1 and the granulator 2. Plastic filaments exiting from the outlet of the melting mill 1 pass through the cold water tank 3 and enter the air-cooling box 4, before entering the granulator 2 to be granulated. The cold water tank 3 and the air-cooling box 4 accelerate the cooling speed of the plastic filaments, solving the problems of large space occupation and low cooling efficiency caused by the current need to increase the distance between the melting mill 1 and the granulator 2 for natural cooling, thus improving the re-granulation production efficiency.

[0018] Specifically, the aforementioned cold water tank 3 is a rectangular tank with a length of 2.8-3.2m to ensure cooling effect while minimizing space occupation. The front end of the cold water tank 3 is provided with a water outlet 301, which is equipped with a switch and connected to a water outlet pipe to discharge water from the cold water tank. The rear end of the cold water tank 3 is provided with a water inlet 302, which is equipped with a switch and connected to a water inlet pipe to supply cold water to the cold water tank. The cold water tank 3 is provided with a first guide roller 303 and a second guide roller 304 near the front and rear ends, respectively. The distance between the first guide roller 303 and the second guide roller 304 and the bottom end of the cold water tank 3 is 8-10cm. The middle of the cold water tank is provided with a support roller 305, which is 4-7cm away from the bottom end of the cold water tank 3. A pressure strip 306 is provided above the support roller 305 and flush with the top end of the cold water tank 3. The plastic filaments from the melting machine 1 enter the cold water tank 3 and pass over the first guide roller 303, the second guide roller 304 and the support roller 305. While being immersed in water, they are prevented from sinking to the bottom. The pressure strip 306 has a limiting effect on the plastic filaments in the middle to prevent them from curling up.

[0019] Furthermore, the first guide roller 303 and the second guide roller 304 are provided with grooves on their circumferential surfaces. The width of the grooves is greater than the diameter of the plastic filaments so that the plastic filaments can pass through the grooves and have a guiding function. The idler roller 305 is a smooth roller, and the idler roller 305 is rotatably connected to the shaft of the idler roller 305 to reduce friction with the plastic filaments.

[0020] The air-cooled box 4 includes an air-cooling tank 401 and an air shroud 402. The air shroud 402 is installed above the air-cooling tank 401 and its top is connected to a cooler via a pipe. The air-cooling tank 401 is an inverted cone shape with a water inlet 403 at its bottom. The water inlet 403 is connected to the rear end of the cold water tank 3 via a pipe 404. A third guide roller 405 and a fourth guide roller 406 are respectively installed near the front and rear sides of the top of the air-cooling tank 401. The surfaces of the third guide roller 404 and the fourth guide roller 405 are circumferentially grooved, and the width of the grooves is greater than the diameter of the plastic filaments. The plastic filaments come out of the cold water tank and enter the air-cooling tank 401. Cold air comes out from the air shroud 402 to further cool the plastic filaments and blow off the water droplets attached to the surface of the plastic filaments. A small amount of water flows out from the water inlet 403 and is discharged into the cold water tank 3 via the pipe 404.

[0021] A slope transition plate 5 is connected between the front end of the air-cooled trough 401 and the rear end of the cold water trough 3. Paper is used to support the plastic filaments to prevent them from sagging and affecting the movement. The connection between the slope transition plate 5 and the air-cooled trough 401 and the cold water trough 3 is rounded to avoid scratching the plastic filaments.

[0022] A collection box 6 is provided below the outlet of the granulator 2. A filter plate 601 is provided in the middle of the collection box 6 to separate impurities or plastic filaments that have not been cut into granules from the re-granulation. An opening is opened at the bottom of the collection box 6 to connect to the conveying pipe 7. The conveying pipe 7 is connected to the conveying pump 8 and the end of the conveying pipe 8 is connected to the top of the hopper 9. The upper part of the hopper 9 is cylindrical and the lower part is conical and has a discharge port 10. A valve 11 is provided on the discharge port 10. An observation window 12 is opened at the top of the side wall of the hopper 9 and the upper outer side of the hopper is covered with an opaque rubber layer 13. The rubber layer 13 has the function of heat insulation and light blocking for the hopper 9 to ensure the performance of re-granulation.

[0023] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from its design spirit and principles should fall within the protection scope defined by the claims of the present invention.

Claims

1. A recycling and granulation device based on plastic film production, comprising a melting mill and a granulator, characterized in that, A cold water tank and an air-cooled box are installed sequentially between the melting machine and the granulator. The plastic filaments coming out of the outlet of the melting machine pass through the cold water tank and enter the air-cooled box, and then enter the granulator to be granulated.

2. The re-granulation and recycling device based on plastic film production according to claim 1, characterized in that, The cold water tank is a rectangular tank with a length of 2.8-3.2m. The front end of the cold water tank is provided with an outlet and the rear end is provided with an inlet. The cold water tank is provided with a first guide roller and a second guide roller near the front end and the rear end respectively. The distance between the first guide roller and the second guide roller and the bottom end of the cold water tank is 8-10cm. The middle of the cold water tank is provided with a support roller. The distance between the support roller and the bottom end of the cold water tank is 4-7cm. A pressure strip is provided above the support roller and flush with the top of the cold water tank.

3. The re-granulation and recycling device based on plastic film production according to claim 2, characterized in that, The first guide roller and the second guide roller have circumferential grooves on their surfaces, and the width of the grooves is greater than the diameter of the plastic filaments; the idler roller is a smooth roller, and the idler roller is rotatably connected to the shaft of the idler roller.

4. The re-granulation and recycling device based on plastic film production according to claim 1, characterized in that, The air-cooled box includes an air-cooled trough and an air shroud. The air shroud is installed above the air-cooled trough and its top is connected to a cold air blower through a pipe. The air-cooled trough is an inverted cone shape with a water inlet at the bottom. The water inlet is connected to the rear end of a cold water tank through a pipe. A third guide roller and a fourth guide roller are respectively installed near the front and rear sides of the top of the air-cooled trough. The surfaces of the third guide roller and the fourth guide roller are provided with grooves in the circumference. The width of the grooves is greater than the diameter of the plastic filaments.

5. The re-granulation and recycling device based on plastic film production according to claim 4, characterized in that, A slope transition plate connects the front end of the air-cooled tank and the rear end of the cold water tank. The connection between the slope transition plate and the air-cooled tank and the cold water tank is rounded.

6. The re-granulation and recycling device based on plastic film production according to claim 1, characterized in that, The granulator is equipped with a collection box below the outlet, a filter plate in the middle of the collection box, and an opening at the bottom for connecting to a conveying pipe. The conveying pipe is connected to a conveying pump and its end is connected to the top of the hopper.

7. The re-granulation and recycling device based on plastic film production according to claim 6, characterized in that, The upper part of the silo is cylindrical, the lower part is conical and has a discharge port. A valve is installed on the discharge port. An observation window is opened at the top of the side wall of the silo, and the upper outer side of the silo is covered with an opaque rubber layer.

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