Multifunctional sheet extrusion experiment line

Abstract

The multifunctional sheet extrusion experiment line comprises an extruder, an extrusion die, a three-roller calender, a cooling and shaping device and a winding machine, the extruder and the extrusion die are integrally installed on a movable base capable of moving front and back, and the extruder comprises a machine barrel and an extrusion screw rotationally arranged in the machine barrel; the extrusion screw comprises a rod body extending from front to back and threads spirally extending along the rod body, the rod body sequentially comprises a feeding section, a compression section, a first homogenization section, a barrier section, a second homogenization section and a mixing section from front to back, the threads are arranged on the feeding section, the compression section, the first homogenization section and the second homogenization section in the mode that the outer diameters of the threads are equal, and the outer diameters of the threads range from 40 mm to 70 mm; the mixing section comprises a plurality of mixing groups which are arranged at intervals from front to back, each mixing group comprises a plurality of first mixing bulges and second mixing bulges which are alternately arranged along the circumference of the rod body, and the first mixing bulges and the second mixing bulges have height difference. The device is suitable for rapid production of small-yield materials in experiments, and waste of raw materials and energy is reduced.

Description

Technical Field

[0001] This application relates to the field of plastic sheet production equipment technology, and in particular to a multifunctional sheet extrusion experimental line. Background Technology

[0002] In the fields of materials research and development and small-batch production, traditional extrusion equipment is large, has high capacity and high energy consumption, which seriously restricts experimental efficiency and resource utilization efficiency. When conducting material testing, it will cause a lot of waste of raw materials and energy, and the production time is long, which prolongs the experimental cycle. Summary of the Invention

[0003] To address the aforementioned technical problems, the purpose of this application is to provide a multifunctional sheet extrusion test line that is energy-efficient and allows for rapid material testing.

[0004] To achieve the above objectives, this application adopts the following technical solution: a multifunctional sheet extrusion experimental line, comprising an extruder, an extrusion die, a three-roll calender, a cooling and shaping device, and a winding machine arranged sequentially from upstream to downstream. The extruder and the extrusion die are integrated and mounted on a movable base, which is capable of moving back and forth in the front-to-back direction. The extruder includes a barrel extending in the front-to-back direction and an extrusion screw rotatably disposed within the barrel. The extrusion screw includes a rod extending from front to back and a thread extending helically along the rod. The rod, from front to back, consists of a feeding section, a compression section, a first homogenization section, a barrier section, a second homogenization section, and a mixing section. The thread outer diameter is arranged equally on the feed section. The feed section, compression section, first homogenization section, and second homogenization section are described above. The outer diameter of the thread is 40mm-70mm. The bottom diameter of the compression section gradually increases from front to back. The barrier section has several spirally extending feed grooves and several discharge grooves, which are alternately arranged in the circumferential direction of the rod. The mixing section includes multiple mixing groups arranged at intervals from front to back. Each mixing group includes multiple first mixing protrusions and multiple second mixing protrusions, which are alternately arranged in the circumferential direction of the rod. The first mixing protrusions and the second mixing protrusions have a height difference.

[0005] In the above technical solution, it is further preferred that the lead of the thread in the second homogenization section is greater than the lead of the thread in the first homogenization section, the lead of the thread in the first homogenization section is greater than the lead of the thread in the compression section, and the lead of the thread in the compression section is greater than the lead of the thread in the feeding section.

[0006] In the above technical solution, it is further preferred that the bottom diameter of the feeding section is equal to the minimum bottom diameter of the compression section, the bottom diameter of the first homogenization section is equal to the maximum bottom diameter of the compression section, and the bottom diameter of the second homogenization section is equal to the bottom diameter of the first homogenization section.

[0007] In the above technical solution, it is further preferred that the feed trough and the axis of the rod have an included angle of 30°-50°, and the discharge trough is parallel to the feed trough.

[0008] In the above technical solution, it is further preferred that, in the rotation direction of the extrusion screw, a barrier is formed between each of the feed troughs and the downstream discharge trough, and the barrier has a barrier gap of 0.1mm-0.15mm between it and the inner wall surface of the barrel.

[0009] In the above technical solution, a further preferred embodiment is that a screen changer and a metering pump are provided between the extruder and the extrusion die, and both the screen changer and the metering pump are mounted on the movable base.

[0010] In the above technical solution, a further preferred embodiment includes a moving mechanism, which includes a base frame, a plurality of moving wheels installed at the bottom of the moving base, and an adjustment assembly connected between the moving base and the base frame. The adjustment assembly includes a lead screw extending in the front-rear direction, a lead screw nut installed on the moving base, a support seat installed on the base frame, and a crank handle connected to the lead screw. The lead screw passes through the lead screw nut and the support seat and is threadedly connected to the lead screw nut.

[0011] In the above technical solution, a further preferred embodiment includes a roller temperature controller, which is connected to the rollers of the three-roll calender and is offset to one side of the cooling and shaping device.

[0012] In the above technical solution, a further preferred embodiment is that the cooling and shaping device includes a cooling bracket, a slitting mechanism, and a traction machine. The cooling bracket extends in the front-to-back direction, the traction machine is installed above the rear end of the cooling bracket, the winding machine is connected to the rear end of the cooling bracket, and the slitting mechanism is mounted above the cooling bracket.

[0013] Compared with the prior art, this application achieves the following beneficial effects:

[0014] The multifunctional sheet extrusion experimental line of this application has a simple structure and a small footprint. It is designed for experimental purposes, and in particular, the extrusion screw of the extruder is designed for the characteristics of experimental applications, which can adapt to the rapid production of small-volume materials and reduce the waste of raw materials and energy. Attached Figure Description

[0015] Figure 1 A front view of a multifunctional sheet extrusion test line provided in an embodiment of this application;

[0016] Figure 2 for Figure 1 Top view of the multifunctional sheet extrusion experimental line in the middle;

[0017] Figure 3 for Figure 1 A schematic diagram of the extrusion screw in the process;

[0018] Figure 4 for Figure 3 Schematic diagram of the middle barrier segment;

[0019] Figure 5 for Figure 3 A schematic diagram of the cross-section of the intermediate mixing section.

[0020] The components are as follows: 10. Extruder; 1. Barrel; 2. Extrusion screw; 21. Screw body; 211. Feed section; 212. Compression section; 213. First homogenization section; 214. Barrier section; 215. Second homogenization section; 216. Mixing section; 22. Thread; 23. Feed chute; 24. Discharge chute; 25. Barrier; 26. Mixing unit; 261. First mixing protrusion; 262. Second mixing protrusion; 20. Extrusion die; 30. Three-roll calender; 7. Roller temperature controller; 40. Cooling and shaping device; 8. Cooling bracket; 9. Slitting mechanism; 11. Traction machine; 50. Winding machine; 60. Screen changer; 70. Metering pump; 80. Moving mechanism; 4. Base frame; 5. Moving wheels; 6. Adjusting assembly; 61. Lead screw; 62. Lead screw nut; 63. Support base; 64. Crank handle; 90. Control cabinet. Detailed Implementation

[0021] To illustrate the technical content, structural features, achieved objectives, and effects of the application in detail, the technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. In the following description, for illustrative purposes, numerous specific details are set forth to provide a detailed description of various exemplary embodiments or implementations of the invention. However, various exemplary embodiments may also be implemented without these specific details or in one or more equivalent arrangements. Furthermore, the various exemplary embodiments may differ, but are not necessarily exclusive. For example, the specific shape, structure, and characteristics of the exemplary embodiments may be used or implemented in another exemplary embodiment without departing from the inventive concept.

[0022] This application provides a multifunctional sheet extrusion test line, which is designed specifically for experimental purposes. It has low capacity, low energy consumption, and high production speed. It is suitable for testing the performance of various materials such as PE, PP, PS, TPO, EVA, and PA, thereby reducing the waste of raw materials and energy.

[0023] like Figure 1 , 2 As shown, the multifunctional sheet extrusion test line includes an extruder 10, an extrusion die 20, a three-roll calender 30, a cooling and shaping device 40, and a winding machine 50 arranged sequentially from upstream to downstream. The extruder 10 and the extrusion die 20 are integrated and mounted on a movable base 3. The entire assembly can move along the front-back direction via the movable base 3 to facilitate approaching and moving away from the three-roll calender 30, thereby improving the convenience of cleaning, maintenance, and repair.

[0024] like Figure 1 , 3 As shown, the extruder 10 includes a barrel 1 extending in a front-to-back direction and an extrusion screw 2 rotatably disposed within the barrel 1. The extrusion screw 2 includes a rod body 21 extending from front to back and a thread 22 extending helically along the rod body 21. The rod body 21, from front to back, consists of a feed section 211, a compression section 212, a first homogenization section 213, a barrier section 214, a second homogenization section 215, and a mixing section 216. Because the outer diameter of the extrusion screw 2 for experimental purposes is relatively small to accommodate the production of small quantities of material, the outer diameter of the thread 22 is 40mm-70mm. In this embodiment, the outer diameter of the thread 22 is 50mm. The outer diameter of the thread 22 is uniformly and unchanged in the feed section 211, the compression section 212, the first homogenization section 213, and the second homogenization section 215. The smaller outer diameter of the extrusion screw 2 requires less driving power, effectively reducing the energy consumption of the extruder 10.

[0025] The bottom diameter of the compression section 212 gradually increases from front to back, and the bottom diameter D1 of the feed section 211 is equal to the minimum bottom diameter D of the compression section 212. min The bottom diameter D2 of the first homogenization section 213 is equal to the maximum bottom diameter D of the compression section 212. max The bottom diameter D3 of the second homogenization section 215 is equal to the bottom diameter D2 of the first homogenization section 213. The lead S1 of the thread in the feed section 211 is less than the lead S2 of the thread in the compression section 212, the lead S2 of the thread in the compression section 212 is less than the lead S3 of the thread in the first homogenization section 213, and the lead S3 of the thread in the first homogenization section 213 is less than the lead S4 of the thread in the second homogenization section 215. The gradually increasing lead of the thread 22 on the rod 21 makes the forward conveying speed of the material on the extrusion screw 2 gradually increase, thereby improving production efficiency.

[0026] The small-diameter feed section 211, combined with the thread 22 with a constant outer diameter, forms a deeper screw groove, thereby increasing the feed capacity of the feed section 211. The compression section 212 with a gradually increasing bottom diameter, combined with the thread 22 with a constant outer diameter, forms a screw groove with a gradually decreasing volume, so that the material conveyed in the feed section 211 is gradually compressed and melted in the compression section 212. The first homogenization section 213 with a constant bottom diameter from front to back, combined with the thread 22 with a constant outer diameter, forms a screw groove with equal volume, which can stabilize the conveying pressure of the material output from the compression section 212.

[0027] like Figure 3 , 4 As shown, the barrier section 214 has several spirally extending feed grooves 23 and several discharge grooves 24. The feed grooves 23 and discharge grooves 24 are arranged alternately in the circumferential direction of the rod 21. The feed grooves 23 and the axis X1 of the rod 21 have an included angle α of 30°-50°. The discharge grooves 24 are parallel to the feed grooves 23. In the rotation direction of the extrusion screw 2, each feed groove 23 and the downstream discharge groove 24 form a barrier 25 inclined to the axis X1. The barrier 25 has a barrier gap of 0.1mm-0.15mm between it and the inner wall of the barrel 1. The material conveyed backward from the first homogenization section 213 enters the barrier section 214 from each feed chute 23. During the rotation of the extrusion screw 2, the molten material crosses the barrier 25 and enters the discharge chute 24. The unmelted solid material is blocked by the barrier in the feed chute 23 and is compressed within the feed chute 23. It gradually melts through the shear heat generated by the rotation of the extrusion screw 2 and the heating of the barrel. The barrier section 214 separates the material into solid and liquid phases through the barrier 25, and shears and heats the solid material to fully plasticize and melt it, significantly improving the melting efficiency of the extruder and the product quality.

[0028] The second homogenization section 215, with a bottom diameter that remains constant from front to back, and the threaded section 22 with the largest lead, on the one hand, stabilize the pressure of the material output from the barrier section 214, and on the other hand, increase the speed of the material being conveyed backward, so that the material is quickly conveyed to the discharge port of the barrel 1.

[0029] like Figure 3 , 5As shown, the mixing section 216 includes multiple mixing groups 26 arranged at intervals from front to back. Each mixing group 26 includes a plurality of mixing protrusions spaced at intervals along the circumference of the rod 21. In this embodiment, the plurality of mixing protrusions within each mixing group 26 includes a plurality of first mixing protrusions 261 and a plurality of second mixing protrusions 262. The plurality of first mixing protrusions 261 and the plurality of second mixing protrusions 262 are alternately distributed along the circumference of the rod 21. The first mixing protrusions 261 and the second mixing protrusions 262 have a height difference of 1 mm, and the height of the first mixing protrusions 261 is less than the height of the second mixing protrusions 262. The multiple mixing groups 26 of the mixing section 216 continuously disperse and mix the material, improving the uniformity of the material; the mixing protrusions with height differences accelerate the discharge speed of the material.

[0030] The structural design of the extrusion screw 2 in this application reduces the energy consumption of the extruder 10, accelerates the material conveying speed on the extruder 10, and improves the melting efficiency of the material while the extrusion screw 2 rapidly conveys the material, so that the material is fully melted and plasticized, thereby improving production efficiency.

[0031] like Figure 1 , 2 As shown, a screen changer 60 and a metering pump 70 are installed between the extruder 10 and the extrusion die 20. The screen changer 60 is installed at the discharge port of the extruder 10 to filter impurities in the material and prevent them from scratching the rollers of the downstream three-roll calender 30. The screen changer 60 is a manual screen changer, which is small in size and easy to operate. Compared with a hydraulically driven screen changer, the manual screen changer is simple to maintain, pollution-free, and occupies less space. The metering pump 70 is used to regulate the flow rate of the material. Both the screen changer 60 and the metering pump 70 are mounted on the movable base 3. The extruder 10, screen changer 60, metering pump 70, and extrusion die 20 are integrated and mounted on the movable base 3, and the entire assembly moves in the front-to-back direction via the movable base 3.

[0032] This multifunctional sheet extrusion experimental line also includes a moving mechanism 80. The moving mechanism 80 includes a base frame 4, several moving wheels 5 mounted on the bottom of the moving base 3, and an adjustment assembly 6 connecting the moving base 3 and the base frame 4. The adjustment assembly 6 includes a lead screw 61 extending in the front-to-back direction, a lead screw nut 62 mounted on the moving base 3, a support seat 63 mounted on the base frame 4, and a crank handle 64 connected to the lead screw 61. The lead screw nut 62 and the support seat 63 are arranged opposite each other, with the lead screw 61 passing through both the lead screw nut 62 and the support seat 63, and threadedly connected to the lead screw nut 62. The crank handle 64 is connected to the front end of the lead screw 61 for rotating the lead screw 61. When the lead screw 61 rotates around its own axis, the lead screw nut 62 drives the moving base 3 to move relative to the lead screw 61 in the front-to-back direction. When mold or extruder cleaning and maintenance are required, the crank handle 64 drives the moving base 3 and its components away from the three-roll calender 30, making operation convenient and improving cleaning speed.

[0033] The three-roll calender 30 is connected to a roller temperature controller 7, which is biased to one side of the cooling and shaping device 40 to reduce its footprint in the front-to-back direction. The roller temperature controller 7 precisely controls the temperature of the three rollers of the three-roll calender 30, thereby improving calendering efficiency.

[0034] The cooling and shaping device 40 includes a cooling bracket 8, a slitting mechanism 9, and a traction machine 11. The cooling bracket 8 extends in the front-to-back direction and carries the sheet output from the three-roll calender 30, allowing the sheet to be conveyed flat from front to back and cooled naturally during the conveying process. The traction machine 11 is installed above the rear end of the cooling bracket 8 to provide traction force for the front-to-back conveying of the sheet. The slitting mechanism 9 is mounted above the cooling bracket 8 and is used to trim the sides of the sheet, making the left and right sides of the sheet flat and improving the winding quality. The winding machine 50 is connected to the rear end of the cooling bracket 8 and is used to wind and rewind the cooled and shaped sheet.

[0035] The multifunctional sheet extrusion test line also includes a control cabinet 90, which is connected to various power-consuming devices to provide power. The control cabinet 90 is offset to one side of the extruder 10.

[0036] The multifunctional sheet extrusion experimental line of this application has a simple structure and a small footprint. It is designed for experimental purposes, and in particular, the extrusion screw of the extruder is designed for the characteristics of experimental applications, which can adapt to the rapid production of small-volume materials and reduce the waste of raw materials and energy.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this application. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this application. Various changes and modifications can be made without departing from the spirit and scope of this application. The scope of protection claimed by this application is defined by the appended claims, specification, and their equivalents.

Claims

1. A multifunctional sheet extrusion experiment line comprising an extruder, an extrusion die, a three-roll calender, a cooling and setting device, and a winding machine arranged in order from upstream to downstream, characterized in that, The extruder and the extrusion die are integrally installed on a moving base capable of moving back and forth in the front-rear direction, the extruder comprises a barrel extending in the front-rear direction and an extrusion screw rotatably arranged in the barrel, the extrusion screw comprises a shaft body extending from front to rear and a screw thread extending spirally along the shaft body, the shaft body comprises, in sequence from front to rear, a feeding section, a compression section, a first homogenizing section, a barrier section, a second homogenizing section and a mixing section, the screw threads are arranged at equal outer diameters in the feeding section, the compression section, the first homogenizing section and the second homogenizing section, and the outer diameter of the screw thread is 40-70 mm; the bottom diameter of the compression section gradually increases from front to rear, the barrier section is provided with a plurality of feeding grooves and a plurality of discharging grooves extending spirally, the feeding grooves and the discharging grooves are arranged alternately in the circumferential direction of the shaft body, and the mixing section comprises a plurality of mixing groups arranged at intervals from front to rear, each mixing group comprises a plurality of first mixing protrusions and a plurality of second mixing protrusions, the first mixing protrusions and the second mixing protrusions are arranged alternately in the circumferential direction of the shaft body, and the first mixing protrusions and the second mixing protrusions have a height difference.

2. The multi-functional sheet extrusion lab line of claim 1, wherein, The lead of the screw thread of the second homogenizing section is greater than the lead of the screw thread of the first homogenizing section, the lead of the screw thread of the first homogenizing section is greater than the lead of the screw thread of the compression section, and the lead of the screw thread of the compression section is greater than the lead of the screw thread of the feeding section.

3. The multi-functional sheet extrusion lab line of claim 1, wherein, The bottom diameter of the feeding section is equal to the minimum bottom diameter of the compression section, the bottom diameter of the first homogenizing section is equal to the maximum bottom diameter of the compression section, and the bottom diameter of the second homogenizing section is equal to the bottom diameter of the first homogenizing section.

4. The multi-functional sheet extrusion lab line of claim 1, wherein, The feeding grooves and the shaft body have an included angle of 30-50°, and the discharging grooves are parallel to the feeding grooves.

5. The multi-functional sheet extrusion lab line of claim 4, wherein, In the rotation direction of the extrusion screw, each feeding groove forms a barrier with a downstream discharging groove, and the barrier has a barrier gap of 0.1-0.15 mm with the inner wall surface of the barrel.

6. The multi-functional sheet extrusion lab line of claim 1, wherein, A screen changer and a metering pump are arranged between the extruder and the extrusion die, and the screen changer and the metering pump are both installed on the moving base.

7. The multi-functional sheet extrusion lab line of claim 1, wherein, A moving mechanism is further included, the moving mechanism comprises a base frame, a plurality of moving wheels installed on the bottom of the moving base, and an adjusting assembly connected between the moving base and the base frame, the adjusting assembly comprises a lead screw extending in the front-rear direction, a lead screw nut installed on the moving base, a support seat installed on the base frame, and a rocking handle connected with the lead screw, the lead screw is arranged in the lead screw nut and the support seat and is threadedly connected with the lead screw nut.

8. The multi-functional sheet extrusion lab line of claim 1, wherein, A roller temperature controller is further included, the roller temperature controller is in communication with the roller cylinders of the three-roller calender and is offset to one side of the cooling and shaping device.

9. The multi-functional sheet extrusion lab line of claim 1, wherein, The cooling and setting device comprises a cooling bracket, a longitudinal cutting mechanism and a traction machine, the cooling bracket extends in the front-rear direction, the traction machine is installed above the rear end of the cooling bracket, the winding machine is connected to the rear end of the cooling bracket, and the longitudinal cutting mechanism is arranged above the cooling bracket.

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