CN2740378Y - Polyester plastic recovering device with single screw - Google Patents

Abstract

The utility model discloses a high-efficiency single-screw plastic recycling machine capable of producing high-quality recycled polyester pellets with reliable operation. One end of the extruder is connected with a motor, and the other end is connected with a die head through a screen changer; At the feed port of the extruder; the outlet of the die is connected to the water tank, and the other end of the water tank is connected to the pelletizer through the drying device; the other end of the pelletizer is connected to the air blowing device through the vibration device, It is equipped with a large length-to-diameter ratio, internal cooling, double exhaust and recovery single-screw, and the compactor adopts a centrifugal cutting and feeding device. Compared with the prior art, the utility model has good yield and quality of recovered pellets and low energy consumption, and has great economic value and practical value in plastic film processing.

Description

Single Screw Polyester Plastic Recycling Machine

1. Technical field

The utility model belongs to plastic film processing equipment, in particular to a single-screw polyester plastic recycling machine.

2. Background technology

Before the utility model was made, most of the existing plastic recycling equipment used the twin-screw extrusion processing form, and the film fragments were forcibly pressed in by the feeding screw, and melted and granulated by the same or different twin-screws. The twin-screw granulator has the following problems:

1. The manufacturing process of twin-screw extrusion components is complex and the processing cycle is long, which makes the overall cost of the equipment too high, the waste film recycling cost is high, and the meaning of recycling is lost. A large number of small and medium-sized enterprises have to throw away the scraps and waste films produced in production or Sell to paint factory etc. at low price.

2. Since the twin-screws need to be fed quantitatively, the bulk density of waste film fragments is extremely low, only about 0.01, which basically cannot meet the feeding requirements of the twin-screws. Therefore, the extrusion capacity of the general recycling twin-screw is low. For example, the extrusion capacity of the 92 units common in the market is only 200 kg/hour.

3. Polyester plastic is an easily degradable material, which is very sensitive to water and heat. If it is not handled properly, the viscosity of the product will drop greatly. If the viscosity drop exceeds 0.03, it will affect the recycling effect. If it exceeds 0.05, it cannot be recycled and can only be used. Downgrade to use. However, the exhaust effect of the twin-screw is poor, and the control accuracy of the viscosity drop cannot be guaranteed.

3. Contents of the invention

The purpose of the utility model is to provide a high-efficiency single-screw plastic recycling machine with reliable operation and capable of producing high-quality recycled polyester pellets.

The purpose of this utility model is achieved through the following technical solutions: a single-screw polyester plastic recycling machine, which is characterized in that it includes an extruder, a compactor, a screen changer, a die head, a water tank, a drying device, Pelletizer, vibration device and air delivery device, one end of the extruder is connected to the motor, and the other end is connected to the die head through a screen changer; the compactor is arranged at the feed port of the extruder; the outlet of the die head is connected to the The water tank is connected, and the other end of the water tank is connected with the granulator through the drying device; the other end of the granulator is connected with the air blowing device through the vibration device.

The utility model is equipped with a large length-diameter ratio internal cooling double exhaust recovery single screw in the extruder. The single screw has low manufacturing cost and good exhaust effect, which can ensure the control accuracy of viscosity drop. The compactor adopts a centrifugal cutting and feeding device, and the raw film fragments can be directly thrown into the side extruder by the feeding device without granulation treatment, and finally made into plastic granules by the plastic recycling machine.

In the utility model, after cutting and compacting the crushed PET waste film, it is forced into the extruder by centrifugal force, plasticized and melted in the extruder, and the water vapor and impurities are discharged by the vacuum system, and then shaped by the mold. , after cooling in water, it is cut into dry polyester plastic particles that are suitable for subsequent molding processes. The automatic speed regulation and temperature control system of the utility model uses PLC as the main control device of the system, adopts a new type of touch screen operation, has a friendly and open man-machine interface, and is convenient for system information integration at the same time. Through the communication between the touch screen and the programmable sequencer, the automatic control of each underlying equipment can be realized, and the recovery unit can be fully managed. The automatic control system can conveniently realize the setting, real-time control, real-time display and information storage of various process parameters (plasticizing temperature, operating speed) and alarm parameters (safety protection such as material temperature, material pressure, and current overload). Compared with the prior art, the utility model has the following advantages: 1. Use the ultra-low density film fragment compaction feeding device to ensure the feeding amount of the film fragments, and at the same time remove part of the moisture in advance to prevent the extrusion and melting process. Degradation; 2. The single screw with large aspect ratio and double exhaust can fully plasticize the film fragments and remove moisture and impurities; the dual-channel automatic filter device can effectively remove fine impurities and ensure the film-forming properties of the subsequent process; 3 , The negative pressure drying device can effectively remove the surface moisture of the finished particles, ensuring the output and quality of the recycled pellets, and low energy consumption.

4. Description of drawings

Accompanying drawing is the structural representation of the utility model.

5. Specific implementation

A kind of single-screw plastic recycling machine described in the utility model, comprises extruder 1, compactor 2, screen changer 3, die head 4, water tank 5, drying device 6, granulator 7, vibrating device 8 and wind Send device 9. The extruder 1 is driven by a motor, and the other end is connected to the die head 4 through the screen changer 3. The extruder 1 is equipped with a single screw with a large length-to-diameter ratio, internal cooling, double exhaust, and recovery. The single screw has low manufacturing cost and excellent exhaust effect. Well, the control accuracy of the viscosity drop can be guaranteed. The screen changer 3 can play the role of filtering impurities. The compactor 2 is set at the feeding port of the extruder 1, and it adopts a centrifugal cutting feeding device, and the raw film fragments can be directly thrown into the side extruder 1 by the feeding device without granulation treatment. The die head 4 used for casting strip forming is connected with the water tank 5, and the other end of the water tank 5 is connected with the pelletizer 7 through the drying device 6;

When working, the raw material film fragments are directly thrown into the side extruder 1 by the feeding device 2, and after being extruded by a large length-to-diameter ratio internal cooling double exhaust recovery single screw, the impurities are filtered out by the screen changer 3, and the die head 4 Casting belt forming, after the plastic belt film is cooled by the water tank 5, it is dried by the drying device 6; the plastic belt film after the drying treatment is cut into small plastic particles by the pelletizer 7, and then screened by the vibration device 8, Plastic granules with a suitable particle size are obtained, and finally qualified plastic granules are transported out through the air delivery device 9 . The automatic speed regulation and temperature control system of the utility model can adopt PLC as the main control device of the system, adopt a new type of touch screen to operate, the human-machine interface is friendly and open, and at the same time, it is convenient for system information integration. Through the communication between the touch screen and the programmable sequencer, the automatic control of each underlying equipment can be realized, and the recovery unit can be fully managed. The automatic control system can conveniently realize the setting, real-time control, real-time display and information storage of various process parameters (plasticizing temperature, operating speed) and alarm parameters (safety protection such as material temperature, material pressure, and current overload).

Claims (3)

1, a kind of single-screw polyester plastic recycling machine is characterized in that: it comprises extruder (1), compactor (2), screen changer (3), die head (4), water tank (5), Drying device (6), pelletizer (7), vibrating device (8) and air delivery device (9), one end of the extruder (1) is connected to the motor (10), and the other end is passed through the screen changer (3) Connect with the die (4); the compactor (2) is arranged at the feeding port of the extruder (1); the outlet of the die (4) is connected with the water tank (5), and the other end of the water tank (5) passes through The drying device (6) is connected with the granulator (7); the other end of the granulator (7) is connected with the air delivery device (9) through the vibrating device (8). 2. The single-screw polyester plastic recycling machine according to claim 1, characterized in that: the extruder (1) is equipped with a single-screw recycling single-screw with large length-to-diameter ratio, internal cooling, and double exhaust. 3. The single-screw polyester plastic recycling machine according to claim 1, characterized in that: the compactor (2) is a centrifugal cutting and feeding device.

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