CN-121989396-A - PE film cooling device and method for plastic waste recycling production

CN121989396ACN 121989396 ACN121989396 ACN 121989396ACN-121989396-A

Abstract

The invention relates to the technical field of film production, in particular to a PE film cooling device and a PE film cooling method for plastic waste recycling production, comprising a conveying component, a cooling component, a drying component and a reflux box, wherein the conveying component comprises a conveying roller, a reversing roller and a discharging roller; the cooling assembly comprises a rotating seat, a water supply pipe and a plurality of spray heads, wherein the rotating seat is rotatably arranged in the treatment box, the water supply pipe is arranged on the rotating seat, the spray heads are rotatably arranged on the water supply pipe and are used for spraying water to the thin film obliquely downwards, the drying assembly is arranged above the spray heads, and the backflow box is arranged at the bottom of the treatment box. The film can be in a vertical state, so that liquid can flow down under the action of gravity to pre-cool the film below, the liquid can absorb heat fully, and the cooling efficiency is improved.

Inventors

HE YIFAN
HE JINGCHANG
Liang Kongbiao

Assignees

浙江高远新材料科技有限公司

Dates

Publication Date: 20260508
Application Date: 20260203

Claims (10)

1. The PE film cooling device for plastic waste recycling production comprises a base, a support frame and a processing box, wherein the support frame is fixed on the base, the processing box is fixed on the support frame, The PE film conveying device comprises a treatment box, and is characterized by further comprising a conveying assembly, a cooling assembly, a drying assembly and a reflux box, wherein the conveying assembly comprises a conveying roller, a reversing roller and a discharging roller, the conveying roller and the discharging roller are arranged in the treatment box, and the reversing roller is arranged between the conveying roller and the discharging roller and is used for converting a PE film into a vertical state for conveying; the cooling assembly comprises a rotating seat, a water supply pipe and a plurality of spray heads, wherein the rotating seat is rotatably arranged in the treatment box, the water supply pipe is arranged on the rotating seat, the spray heads are rotatably arranged on the water supply pipe and used for spraying water to the thin films obliquely downwards, the drying assembly is arranged above the spray heads, and the backflow box is arranged at the bottom of the treatment box.
2. A PE film cooling apparatus for recycling plastic waste according to claim 1, wherein, The conveying assembly further comprises a water accumulating roller and an overflow plate, the water accumulating roller is rotatably arranged on one side of the reversing roller, the overflow plate is arranged on one side of the water accumulating roller and one side of the reversing roller and used for accumulating cooling water falling from the film, and the film entering the water accumulating roller and the reversing roller is pre-cooled by the accumulated cooling water.
3. A PE film cooling apparatus for recycling plastic waste according to claim 2, wherein, The ponding roller comprises a sliding rod, a ponding roller body and a locking screw, wherein the sliding rod is arranged on one side of the conveying roller in a sliding mode, the locking screw is connected to the sliding rod in a threaded mode and used for positioning the sliding rod, and the ponding roller body is arranged on the sliding rod in a rotating mode.
4. A PE film cooling apparatus for recycling plastic waste material in accordance with claim 3, wherein, The reflux tank includes box, backwash pump and back flow, the backwash pump sets up one side of box, the back flow with the backwash pump intercommunication, and with the delivery pipe intercommunication.
5. A PE film cooling apparatus for recycling plastic waste material in accordance with claim 4, wherein, The cooling assembly further comprises two adjusting frames and two reset elastic pieces, wherein the two adjusting frames are arranged on the water supply pipe in a sliding mode and used for dividing the spray head into two groups for position adjustment, the two reset elastic pieces are respectively arranged on one sides of the two adjusting frames, the conveying assembly further comprises two baffles, an adjusting screw rod and two control rods, the two baffles are arranged on two sides of the water supply pipe in a sliding mode, the adjusting screw rod is provided with two sections of opposite threads, the adjusting screw rod is in threaded connection with the two baffles, and the two control rods are respectively connected with the two baffles and used for adjusting the position of the spray head by contacting the adjusting frames.
6. A PE film cooling apparatus for recycling plastic waste according to claim 5, wherein, The delivery assembly further includes a baffle disposed between the dryer and the spray head.
7. A PE film cooling apparatus for recycling plastic waste material in accordance with claim 6, wherein, The baffle includes baffle body, two rotor plates, two wringing rollers, slip frame and riser, two rotor plates rotate and set up on the baffle body, two the wringing rollers respectively with two rotor plates are connected be provided with protruding pole on the rotor plates, the slip frame slides and sets up one side of wringing rollers, protruding pole is located in the recess of slip frame, the output of riser with the slip frame is connected.
8. A PE film cooling apparatus for recycling plastic waste according to claim 7, wherein, The dryer comprises a fan, a guide plate and a heater, wherein the fan is fixed above the partition plate, the guide plate is arranged on the fan, and the heater is arranged on one side of the guide plate.
9. A PE film cooling apparatus for recycling plastic waste according to claim 8, wherein, The dryer also comprises a temperature sensor and a ventilation structure, wherein the temperature sensor is arranged in the space between the processing box and the partition board, and the ventilation structure is connected with the temperature sensor and used for starting the ventilation structure to ventilate after the temperature value acquired by the temperature sensor exceeds a preset value.
10. A cooling method for producing a PE film by recycling plastic waste, which is characterized by comprising the steps of: The PE film produced by recycling the plastic waste passes through the conveying roller and bypasses the reversing roller to vertically upwards, and then bypasses the discharging roller; Rotating the rotating seat to adjust the angle of the spray head to incline downwards, and spraying water to the PE film to cool; the water flow continuously cools the entered PE film downwards along the film and flows into a reflux tank for storage.

Description

PE film cooling device and method for plastic waste recycling production Technical Field The invention relates to the technical field of film production, in particular to a PE film cooling device and method for plastic waste recycling production. Background The PE film is produced by recycling plastic waste, which is an environment-friendly and resource recycling process. In this process, various waste plastic products, particularly those having Polyethylene (PE) as a main component, such as packaging bags, plastic films, etc., are first collected. These wastes are subjected to strict classification and washing, and after removal of impurities, are crushed into small pieces or granules. Then, the treated plastic chips are heated to a melting point by a melting reconstruction technique and remolded into new plastic particles. The recycled plastic particles can be used as raw materials to prepare PE films through processes such as blow molding or casting. After extrusion blow molding or casting, the film is in a high temperature state, and must be effectively cooled and shaped to obtain good physical properties, dimensional stability and surface quality, and then can be coiled for storage. However, the cooling devices adopted in many production lines still have obvious technical defects that the cooling process mainly depends on a nozzle to spray cooling liquid (usually water) on the surface of the film, but the cooling liquid cannot fully and uniformly contact the surface of the high-temperature PE film due to unreasonable nozzle design, single spraying angle, oversized droplet size or uneven distribution. Even the phenomenon of spraying blind areas or discontinuous liquid film coverage occurs in partial areas, so that heat cannot be efficiently taken away. Disclosure of Invention The invention aims to provide a PE film cooling device and a PE film cooling method for plastic waste recycling production, which aim to enable films to be in a vertical state, enable liquid to flow down under the action of gravity to pre-cool the films below, enable the liquid to absorb heat sufficiently and improve cooling efficiency. In order to achieve the above purpose, according to a first aspect, the invention provides a PE film cooling device for recycling and producing plastic waste, which comprises a base, a supporting frame, a processing box, a conveying assembly, a cooling assembly, a drying assembly and a backflow box, wherein the supporting frame is fixed on the base, the processing box is fixed on the supporting frame, the conveying assembly comprises a conveying roller, a reversing roller and a discharging roller, the conveying roller and the discharging roller are arranged in the processing box, the reversing roller is arranged between the conveying roller and the discharging roller and is used for conveying PE films in a vertical state, the cooling assembly comprises a rotating seat, a water supply pipe and a plurality of spray heads, the rotating seat is rotatably arranged in the processing box, the water supply pipe is arranged on the rotating seat, the spray heads are rotatably arranged on the water supply pipe and are used for spraying water to the films obliquely downwards, the drying assembly is arranged above the spray heads, and the backflow box is arranged at the bottom of the processing box. The conveying assembly further comprises a water accumulating roller and an overflow plate, the water accumulating roller is rotatably arranged on one side of the reversing roller, the overflow plate is arranged on one side of the water accumulating roller and one side of the reversing roller and used for accumulating cooling water falling from the film, and the film entering the water accumulating roller and the reversing roller is pre-cooled by the accumulated cooling water. The water accumulating roller comprises a sliding rod, a water accumulating roller body and a locking screw, wherein the sliding rod is arranged on one side of the conveying roller in a sliding mode, the locking screw is connected to the sliding rod in a threaded mode and used for positioning the sliding rod, and the water accumulating roller body is arranged on the sliding rod in a rotating mode. The reflux box comprises a box body, a reflux pump and a reflux pipe, wherein the reflux pump is arranged on one side of the box body, and the reflux pipe is communicated with the reflux pump and the water supply pipe. The cooling assembly further comprises two adjusting frames and two reset elastic pieces, wherein the two adjusting frames are arranged on the water supply pipe in a sliding mode and used for dividing the spray head into two groups for position adjustment, the two reset elastic pieces are respectively arranged on one sides of the two adjusting frames, the conveying assembly further comprises two baffles, an adjusting screw rod and two control rods, the two baffles are arranged on two sides of the water supply pipe in a sliding mode, the