CN105313287A - Single-screw extruder - Google Patents

Abstract

The invention discloses a single-screw extruder, which comprises a motor, a screw, a heater and a discharge port. The output part of the motor is connected to the reducer; the reducer is connected to the coupling port; the screw is matched with the reducer and the motor through the coupling; the feeding port is arranged on the surface of the barrel; The top of the feed inlet is provided with an agitator; the screw is arranged in the barrel; the screw is provided with a main thread and a secondary thread; a number of heaters are arranged outside the barrel; the heater is wrapped with a layer Insulation layer; the outer end of the barrel is provided with a safety shield; the bottom of the single-screw extruder is provided with a die; the discharge port is provided at the bottom of the die; the filter layer is provided at the discharge The left side of the mouth; the middle of the die head of the screw extruder is provided with a rectangular baffle. The extruder of the invention has the advantages of reasonable structural design, convenient use and high working efficiency.

Description

A single screw extruder

technical field

The invention relates to an extruder, in particular to a single-screw extruder.

Background technique

At present, with the development of science and technology, people have higher and higher requirements for processing equipment such as plastics, which can effectively recycle and utilize resources. Extruders, which are often used for processing plastics, have more and more functions. At present The process of processing plastic products by extruder mostly uses single-screw extruder without exhaust function. This processing method not only makes the melt mixing not uniform enough, resulting in more crystal points and bubbles in plastic products, but also in this processing process It will lead to high energy consumption and unnecessary waste.

Contents of the invention

In order to overcome the disadvantages of the above-mentioned prior art, the object of the present invention is to provide a single-screw extruder.

The present invention is achieved by adopting the following technical solutions: a single-screw extruder, which includes a motor, a screw, a heater and a discharge port, the output part of the motor is connected with a reducer; the reducer is connected with a shaft coupling The ports are connected; the screw is matched with the reducer and the motor through a coupling; the feed port is set on the surface of the barrel; the top of the feed port is provided with an agitator; the screw is set in the barrel ; The screw rod is provided with a main thread and a secondary thread; the barrel is provided with a number of heaters; the heater is wrapped with a layer of insulation layer; the outer end of the barrel is provided with a safety shield; The bottom of the screw extruder is provided with a die head; the discharge port is arranged at the bottom of the die head; the filter layer is arranged on the left side of the discharge port; the middle of the die head of the screw extruder is provided with a rectangular Baffle plate; the screw is divided into a first feed section and a second feed section; the outer diameter of the main thread on the screw is greater than the outer diameter of the secondary thread set on the screw; the main thread set on the first feed section The pitches between the threads are equal, and the pitches between the main threads and the secondary threads on the second feeding section are different and gradually decrease; the heater is an electric heating wire or an electric heating sheet.

In summary, the present invention has the following beneficial effects: the extruder of the present invention has the advantages of reasonable structural design, convenient use and high work efficiency, and the change of the pitch between the main thread and the secondary thread makes the material completely plasticized and mixed Uniformity reduces crystal points and air bubbles in plastic products; the insulation layer can ensure the liquefaction efficiency of solid materials and improve work efficiency. .

Description of drawings

Fig. 1 is a cross-sectional structure schematic diagram of the present invention;

Among them: 1. Motor; 2. Reducer; 3. Coupling; 4. Stirrer; 5. Feeding port; 6. Barrel; 7. Screw; 8. Main thread; 9. Secondary thread; 10. Heating 11. Insulation layer; 12. Safety shield; 13. First feed section; 14. Second feed section; 15. Baffle; 16. Filter layer; 17. Outlet; 18. Die head; 19. Vent.

detailed description

As shown in Figure 1, a kind of single-screw extruder, it comprises motor 1, screw rod 7, heater 10 and discharge port 5, and described motor output part is connected with reducer 2; Described reducer 2 is connected with shaft coupling The port of the device 3 is connected; the screw 7 is matched with the motor 1 through the coupling 3, the reducer 2; the feeding port 5 is arranged on the surface of the barrel 6; the top of the feeding port 5 is provided with an agitator 4; the screw 7 is set in the barrel 6; the screw 7 is provided with a main thread 8 and a secondary thread 9; the barrel 6 is provided with a number of heaters 10; the heater 10 is wrapped with a layer Insulation layer 11; the outer end of the barrel 6 is provided with a safety shield 12; the bottom of the single-screw extruder is provided with a die head 18; the discharge port 17 is arranged at the bottom end of the die head 18; The filter layer 16 is arranged on the left side of the discharge port 17; a rectangular baffle 15 is arranged in the middle of the die head 18 of the screw extruder.

When using this device, the screw rod 7 in the barrel 6 is transmitted through the motor reducer 2 and the shaft coupling 3; the reducer 2 can effectively improve the torque of rotation and reduce the loss of energy; the screw rod 7 drives The material in the barrel 6 advances helically along the thread direction; the agitator 4 arranged above the barrel 6 can process the raw materials one step in advance, which effectively improves the work efficiency; the main thread 8 and the secondary thread arranged on the screw 7 9 have different pitches, and the closer to the bottom of the screw rod 7, the smaller the pitch, which can realize the compression of the material, so that the material is completely plasticized and mixed evenly; the vent hole 19 provided outside the barrel 6 can fully discharge the gas in the material from the Discharge from the plasticized material, remove the moisture in the material, and reduce the defects of thread processing; the heat insulation layer 11 provided outside the heater 10 can effectively reduce the loss of heat, thereby saving costs; after the material is extruded, it passes through Die head 18, the discharge port 5 that die head 18 places are provided with can discharge material in time, and the baffle plate 15 that die head 18 places are provided with is blocked when one section filter screen 16 occurs, and described baffle plate 15 can be pressed to the outlet that stops. The feed port 17 rotates, and the plastic melt can be discharged from the other side, and the plastic melt can not flow into the broken cavity, thereby greatly improving the working efficiency.

The above are the embodiments of the present invention, so all equivalent changes or modifications made according to the structure, features and principles described in the scope of the application of the present invention are included in the scope of the patent application of the present invention.

Claims (6)

1. a single screw extrusion machine, it comprises motor, screw rod, heater and discharging opening, it is characterized in that: described motor output divides and is connected with decelerator; Described decelerator is connected with shaft coupling port; Described screw rod is matched with decelerator and motor by shaft coupling; Described charging aperture arranges the surface with barrel; Described charging aperture top is provided with agitator; Described screw rod is arranged in barrel; Described screw rod is provided with main thread and deputy thread; Some heaters are provided with outside described barrel; Described heater outer wrapping one layer of heat preservation layer; Described barrel outer end is provided with safty shield; The bottom of described single screw extrusion machine is provided with die head; Described discharging opening is arranged on the bottom of die head; Described filter course is arranged on the left side of discharging opening; Rectangle baffle plate is provided with in the middle of the die head of described screw extruder; Described discharge outlet is provided with two sections of filter screens.

2. a kind of single screw extrusion machine according to claim 1, is characterized in that: described screw rod is divided into the first feed zone and the second feed zone.

3. a kind of single screw extrusion machine according to claim 1, is characterized in that: the main thread external diameter on described screw rod is greater than the deputy thread external diameter that screw rod is arranged.

4. a kind of single screw extrusion machine according to claim 2, is characterized in that: the pitch between the main thread that described first feed zone is arranged is equal, and the different and pitch of pitch on described second feed zone between main thread and deputy thread reduces gradually.

5. a kind of single screw extrusion machine according to claim 1, is characterized in that: described heater is heating wire or electric heating piece.

6. a kind of single screw extrusion machine according to claim 1, is characterized in that: described filter screen is demountable structure.