High-plasticization large-capacity PET (polyethylene terephthalate) flat double extruder

Abstract

The utility model discloses a high-plasticization large-capacity PET (polyethylene terephthalate) flat double extruder which comprises a base, a machine barrel, double screws positioned in the machine barrel and a first power source for driving the screws are arranged on the base, and the high-plasticization large-capacity PET flat double extruder is characterized in that the screws are mandrels and are assembled and connected with a plurality of threaded elements in a sleeving manner; a granular material feeder, a crushed material feeder, a color master batch feeder, a natural air suction port and a vacuum exhaust port are arranged at the upper end of the machine barrel, a water inlet pipe and a water return pipe are arranged on one side of the machine barrel, a converging core is arranged at the front end of the machine barrel, and a ceramic heater is arranged outside the machine barrel. The extruder is high in material plasticizing degree, suitable for extruding more materials, energy-saving, consumption-reducing and cost-reducing.

Description

Technical Field

[0001] The utility model relates to an improved invention of a PET plastic sheet extrusion production line, in particular to an improved invention of a high-plasticizing and large-capacity PET flat twin-screw extruder. Background Art

[0002] The twin-screw extruder is developed on the basis of the single-screw extruder. Due to its good feeding performance, mixing and plasticizing performance, exhaust performance and extrusion stability, etc., it has been widely used in the forming and processing of extruded products. For the existing twin-screw extruder, because different materials are not plasticized uniformly and the screw design method fails to achieve a good adjustment, the quality and output of the products produced by the machine cannot meet the expected requirements. Increasing the screw speed will also cause an increase in cost, resulting in less material output and insufficient plasticization in the extruder, thus greatly affecting the production efficiency of the extruder and the overall product quality. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a high-plasticizing and large-capacity PET flat twin-screw extruder.

[0004] To solve the above technical problem, the utility model is realized by adopting the following technical scheme: This high-plasticizing and large-capacity PET flat twin-screw extruder includes a base, and a barrel is provided on the base, a twin-screw located inside the barrel and a first power source for driving the screw. It is characterized in that: the screw is sleeved and assembled with a mandrel and a number of screw elements; a pellet feeder, a broken material feeder, a color masterbatch feeder, a natural air inlet and a vacuum exhaust port are arranged at the upper end of the barrel; a water inlet pipe and a water return pipe are arranged on one side of the barrel; a melt manifold is arranged at the front end of the barrel; and a ceramic heater is arranged outside the barrel.

[0005] The pellet feeder includes a pellet hopper, a pellet hopper fixing seat and a second power source; the broken material feeder includes a broken material hopper, a broken material hopper fixing seat and a third power source; the pellet hopper fixing seat and the broken material hopper fixing seat are connected side by side at the upper end of the blanking box, and the blanking box is connected to the upper end of the barrel.

[0006] The second power source is a pellet feeding motor and a pellet feeding speed reducer; the pellet hopper fixing seat is connected to the pellet feeding speed reducer through a bushing, and the pellet feeding motor is connected behind the pellet feeding speed reducer.

[0007] The third power source is a broken material feeding motor and a broken material feeding speed reducer; the broken material hopper fixing seat is connected to the broken material feeding speed reducer through a bushing, and the broken material feeding motor is connected behind the broken material feeding speed reducer.

[0008] The first power source is a permanent magnet energy-saving motor, a high-torque reduction gearbox, and a pin-type coupling connecting the two. The pin-type coupling is equipped with a coupling outer cover.

[0009] The natural air inlet is equipped with a natural exhaust port seat, and the vacuum exhaust port is equipped with a vacuum exhaust port seat. A vacuum pipeline is snap-connected to the vacuum exhaust seat, and a vacuum gauge is threadedly connected to the vacuum pipeline.

[0010] A temperature measurement hole is provided below the barrel. A thermocouple is threadedly connected in the temperature measurement hole, and a clearance groove is provided on the corresponding ceramic heater.

[0011] There is 1 natural air inlet and 3 vacuum exhaust ports. The vacuum exhaust ports are connected to the vacuum pumping system.

[0012] The beneficial effects of the present utility model are as follows: The improved high-plasticization and high-production-capacity PET flat twin-screw extruder, through the modular design of the screw, its unique combination minimizes the viscosity drop of PET resin, is applicable to more material properties. Due to the unique design of its screw, 100% PET recycled materials can be achieved, and it can also be used for the production of PP, HIPS, and PLA sheets. The barrel is heated by a ceramic heater, with an energy-saving efficiency of 20 - 30%, reducing costs and being convenient to replace. Four vacuum exhaust ports are designed on the barrel, and an advanced European vacuum pumping system is adopted, greatly improving the degree of material plasticization, avoiding the high electricity cost waste caused by the long-term heating of the crystallization machine and dehumidifier that are necessary for traditional PET single-screw extruders, improving the quality and output of products. Selecting a multi-component feeding device can reasonably control the proportions of new materials, recycled materials, masterbatch, etc., so as to produce more materials of different colors and formulations. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The following further details the specific embodiments of the present utility model in conjunction with the drawings.

[0014] Figure 1 is a schematic structural diagram of the present utility model.

[0015] Figure 2 is a three-dimensional structural diagram of the present utility model.

[0016] Figure 3 is a left view of the structure of the present utility model.

[0017] Figure 4 is for the present utility model Figure 3 A - A sectional view.

[0018] Figure 5 is a top view of the structure of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The attached drawings illustrate the structure of the present utility model. The following further describes its relevant details in conjunction with the attached drawings. In this embodiment, refer to the attached Figures 1 - 5 , the high-plasticizing and large-capacity PET flat twin-screw extruder includes a base 1, and an anti-vibration pad 2 is provided below the base 1. A barrel 7, a twin-screw located inside the barrel 7, and a first power source for driving the screw are provided on the base 1. The barrel 7 is equipped with a barrel support seat 11. The screw is assembled by sleeving a mandrel 8 and a number of screw elements 9, that is, a modular design is adopted. Its unique combination minimizes the viscosity drop of PET resin and is applicable to more material properties. Due to the unique design of its screw, 100% PET recycled material is achieved and it can also be used for the production of PP, HIPS, and PLA sheets; a pellet feeder, a crushed material feeder, a color masterbatch feeder 27, a natural air intake port, and a vacuum exhaust port are provided at the upper end of the barrel 7. A water inlet pipe 32 and a water return pipe 33 are provided on one side of the barrel 7. A melt manifold 37 is provided at the front end of the barrel 7 to converge and extrude the materials extruded by the twin-screw. A ceramic heater 28 is provided outside the barrel 7, and the ceramic heater 28 is equipped with a heater outer cover 29, with an energy-saving efficiency of 20-30%, cost reduction, and convenient replacement.

[0020] As a further improved specific embodiment, the pellet feeder includes a pellet hopper 20, a pellet hopper fixing seat 17, and a second power source. The crushed material feeder includes a crushed material hopper 24, a crushed material hopper fixing seat 21, and a third power source. The pellet hopper fixing seat 17 and the crushed material hopper fixing seat 21 are connected side by side to the upper end of a blanking box 25, and the blanking box 25 is connected to the upper end of the barrel 7. Preferably, a magnetic rack 26 is provided in the blanking box 25 to effectively remove iron impurities in the materials.

[0021] As a further improved specific embodiment, the second power source is a pellet feeding motor 19 and a pellet feeding reduction gearbox 18. The pellet hopper fixing seat 17 is connected to the pellet feeding reduction gearbox 18 through a bushing, and the pellet feeding motor 19 is connected behind the pellet feeding reduction gearbox 18.

[0022] As a further improved specific embodiment, the third power source is a crushed material feeding motor 23 and a crushed material feeding reduction gearbox 22. The crushed material hopper fixing seat 21 is connected to the crushed material feeding reduction gearbox 22 through a bushing, and the crushed material feeding motor 23 is connected behind the crushed material feeding reduction gearbox 22.

[0023] As a specific implementation of further improvement, the first power source is a permanent magnet energy-saving motor 4, a high-torque reduction gearbox 3 and a pin-type coupling 5 connecting the two. The high-torque reduction gearbox 3 is provided with a reduction gearbox support seat 10, and the pin-type coupling 5 is provided with a coupling housing 6. The permanent magnet energy-saving motor 4 is fixed above the base 1, having the advantages of simple structure, small volume, light weight, low loss, high efficiency, and an energy-saving ratio 20%-40% higher than that of ordinary motors.

[0024] As a specific implementation of further improvement, the natural air inlet is provided with a natural exhaust port seat 12, and the vacuum exhaust port is provided with a vacuum exhaust port seat 13. A vacuum pipeline 14 is snap-connected to the vacuum exhaust seat, and a vacuum gauge 15 is thread-connected to the vacuum pipeline 14.

[0025] As a specific implementation of further improvement, a temperature measurement hole is provided below the barrel 7, and a thermocouple 30 is thread-connected to the temperature measurement hole. A clearance groove is provided on the corresponding ceramic heater 28, and the thermocouple 30 is used to detect the temperature of the barrel 7.

[0026] As a specific implementation of further improvement, there is 1 natural air inlet and 3 vacuum exhaust ports. The vacuum exhaust ports are connected to a vacuum pumping system, preferably an advanced European vacuum pumping system. The degree of material plasticization is greatly improved, avoiding the high electricity cost waste caused by the long-time heating of the crystallization machine and dehumidifier that are necessary for traditional PET single-screw extruders, and improving the quality and output of products.

[0027] In summary, the above are only the preferred embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-plasticizing and large-capacity PET flat twin-screw extruder, comprising a base, wherein a barrel is arranged on the base, a twin-screw located inside the barrel, and a first power source for driving the screw, and is characterized in that: The screw rod is assembled by sleeving and connecting a mandrel and several screw elements. The upper end of the barrel is equipped with a granular material feeder, a broken material feeder, a color masterbatch feeder, a natural air inlet and a vacuum exhaust port. One side of the barrel is equipped with a water inlet pipe and a water return pipe. The front end of the barrel is provided with a confluence core, and a ceramic heater is arranged outside the barrel.

2. The high-plasticizing and high-capacity PET flat twin-screw extruder according to claim 1, wherein: The granular material feeder includes a granular material hopper, a granular material hopper fixing seat and a second power source. The broken material feeder includes a broken material hopper, a broken material hopper fixing seat and a third power source. The granular material hopper fixing seat and the broken material hopper fixing seat are connected side by side to the upper end of the blanking box, and the blanking box is connected to the upper end of the barrel.

3. The high-plasticization and large-production-capacity PET flat twin-screw extruder according to claim 2, characterized in that: The second power source is a granular material feeding motor and a granular material feeding reduction gearbox. The granular material hopper fixing seat and the granular material feeding reduction gearbox are connected by a bushing, and the granular material feeding motor is connected behind the granular material feeding reduction gearbox.

4. The high-plasticization and high-production-capacity PET flat twin-screw extruder according to claim 2, characterized in that: The third power source is a broken material feeding motor and a broken material feeding reduction gearbox. The broken material hopper fixing seat and the broken material feeding reduction gearbox are connected by a bushing, and the broken material feeding motor is connected behind the broken material feeding reduction gearbox.

5. The high-plasticizing and high-capacity PET flat twin-screw extruder according to claim 1, wherein: The first power source is a permanent magnet energy-saving motor, a high-torque reduction gearbox and a pin-type coupling connecting the two. The pin-type coupling is equipped with a coupling outer cover.

6. The high-plasticizing and high-capacity PET flat twin-screw extruder according to claim 1, wherein: The natural air inlet is equipped with a natural exhaust port seat, and the vacuum exhaust port is equipped with a vacuum exhaust port seat. A vacuum pipeline is snap-connected to the vacuum exhaust seat, and a vacuum gauge is thread-connected to the vacuum pipeline.

7. The high-plasticizing and large-capacity PET flat twin-screw extruder according to claim 1, characterized in that: A temperature measuring hole is arranged below the barrel, and a thermocouple is thread-connected in the temperature measuring hole. A clearance groove is arranged on the corresponding ceramic heater.

8. The high-plasticization and large-production-capacity PET flat twin-screw extruder according to claim 1, wherein: There is 1 natural air inlet and 3 vacuum exhaust ports, and the vacuum exhaust ports are connected to the vacuum pumping system.

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