Plastic strapping forming device and forming method thereof

Abstract

The application discloses a plastic bundling belt forming device and a forming method thereof, which comprises an extruder, the tail end of the extruder is fixedly connected with a material guiding cylinder, the bottom of the material guiding cylinder is provided with an extrusion hole, the lateral surface of the material guiding cylinder is rotatably connected with a rotary cylinder, the lateral surface of the rotary cylinder is fixedly connected with a plurality of die head pipes which are arranged in a circumferential array, the surface of each die head pipe is provided with a die disc, the top of the extruder is fixedly provided with a support, the inside of the support is slidably connected with a cleaning mechanism for cleaning the die disc, the surface of the support is provided with a conversion motor, the output shaft end of the conversion motor is drivingly connected with the rotary cylinder, the bottom of the extruder is fixedly provided with a water cooling box, and the tail end of the water cooling box is provided with a discharging mechanism. Through the arrangement of the material guiding cylinder, the rotary cylinder and other structures, the device can efficiently complete the hot extrusion forming operation of the plastic bundling belt, and the device changes the single die head structure of the traditional extruder into a multi-die head structure during the hot extrusion forming operation.

Description

Technical Field

[0001] This invention relates to the field of cable ties forming technology, and more specifically, to a plastic cable tie forming apparatus and its forming method. Background Technology

[0002] Plastic strapping is widely used in the packaging of various products. During production, plastic strapping is made by melting raw materials and extruding them into flat, continuous long strips with a width of about 2 centimeters using an injection molding machine. After water cooling and tension balancing, the long strips are rolled up into products.

[0003] In the prior art, patent document CN112810095A discloses a plastic strip extrusion molding production equipment. This equipment includes a feeding device, a screw extruder, a first cooling device, a first traction device, a second traction device, a second cooling device, a third traction device, and a winding device. A laser diameter gauge measures the width of the plastic part in real time, and adjusts the speeds of the second and third drive motors according to the width of the plastic part, thereby restoring the width of the plastic part to a standard. Compared with conventional extrusion operations, the produced plastic parts have a more uniform and standard width. However, the aforementioned plastic strip extrusion production equipment typically uses a single die head during operation. Because it uses a single die head, it is difficult to automatically clean the die head after it becomes clogged. Furthermore, the single die head design makes it inconvenient to switch between different plastic strapping specifications in existing extrusion molding equipment. Additionally, existing extruders often use a static water-cooling structure after water cooling the plastic strip. This static water-cooling structure easily leads to a static watertight protective film forming on the surface of the plastic strip, preventing sufficient contact between the surface and the coolant, resulting in a low cooling rate for the plastic strapping. Therefore, this invention provides a plastic strapping forming device and method to solve the problems mentioned in the background art. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a plastic strapping forming device and its forming method. By setting up structures such as a guide cylinder and a rotary rotating cylinder, the device can efficiently complete the hot extrusion forming of plastic strapping. Furthermore, during the hot extrusion forming operation, the device transforms the traditional single-die head structure of the extruder into a multi-die head structure.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: a plastic strapping forming device, comprising an extruder, a guide cylinder fixedly connected to the tail end of the extruder, an extrusion hole being formed at the bottom of the guide cylinder, a rotary indexing cylinder rotatably connected to the circumferential side of the guide cylinder, a set of die tubes arranged in a circumferential array fixedly connected to the circumferential side of the rotary indexing cylinder, a die plate being mounted on the surface of each die tube, a bracket fixedly mounted on the top of the extruder, a cleaning mechanism for cleaning the die plates being slidably connected inside the bracket, a conversion motor being mounted on the surface of the bracket, the output shaft end of the conversion motor being drivenly connected to the rotary indexing cylinder, a water-cooling box fixedly mounted on the bottom of the extruder, a discharge mechanism being mounted at the tail end of the water-cooling box, and a shaking mechanism and several agitation components linked to the shaking mechanism being respectively installed inside the water-cooling box.

[0008] As a preferred embodiment, the extruder includes an extrusion cylinder fixedly connected to a water-cooling box, a feed hopper fixedly connected to the top of the extrusion cylinder, an extrusion motor fixedly installed at the tail end of the extrusion cylinder, an extrusion shaft fixedly installed at the output shaft end of the extrusion motor, a helical extrusion blade fixedly installed on the circumferential side of the extrusion shaft, the circumferential side of the helical extrusion blade rotatingly engaging with the extrusion cylinder, the tail end of the extrusion cylinder fixedly connected to a guide cylinder, and a helical heating coil installed inside the extrusion cylinder.

[0009] As a preferred embodiment, a set of forming strips arranged in a circumferential array are fixedly installed inside the mold plate, and each forming strip has a forming strip hole that communicates with the mold plate.

[0010] As a preferred embodiment, the cleaning mechanism includes a cleaning press that is slidably connected to the support, and a waste discharge chamber that is opened above the guide cylinder and has an open top. A vertically arranged lifting push rod is fixedly installed on the side of the cleaning press, and the peripheral side of the lifting push rod is fixedly connected to the support. A cleaning shovel pliers adapted to the shape of the forming strip hole are fixedly installed on the bottom surface of the cleaning press and at the position corresponding to each forming strip. A waste discharge pipe communicating with the waste discharge chamber is fixedly installed on the side of the guide cylinder.

[0011] As a preferred embodiment, a waste guide slope is fixedly provided at the bottom of the waste outlet cavity, and the waste outlet cavity is located inside the guide cylinder.

[0012] As a preferred embodiment, the shaking mechanism includes a coupling, an upper shaking frame, and a lower shaking frame. The surfaces of the upper and lower shaking frames are slidably connected to the water-cooled box. A set of horizontally arranged reciprocating push rods are fixedly installed on the surface of the upper shaking frame, and the peripheral sides of the set of reciprocating push rods are fixedly connected to the water-cooled box. Two symmetrically arranged toothed plates are fixedly installed on the bottom and top surfaces of the upper shaking frame. The peripheral side of the coupling is rotatably connected to the water-cooled box, and two symmetrically arranged linkage toothed discs are fixedly installed on the peripheral side of the coupling. The surfaces of the upper and lower shaking frames are driven by the linkage toothed discs through the toothed plates. The linkage toothed discs are located between the upper and lower shaking frames. A set of regularly distributed liquid-dispersing plates are installed between the inner surfaces of the upper and lower shaking frames. The top surface of the lower shaking frame is driven by a set of agitation components through the toothed plates. Several linearly arrayed guide rollers are rotatably connected to the inner walls of the upper and lower shaking frames.

[0013] As a preferred embodiment, the inner wall of the water-cooled box is fixedly installed with a guide plate and two symmetrically arranged guide rails. The peripheral side of the guide plate is slidably connected to the upper shaking frame, and the peripheral side of the two guide rails is slidably connected to the lower shaking frame.

[0014] As a preferred embodiment, the discharge mechanism includes a main winding roller, a pressure strip roller, and a discharge guide roller. The tail end of the main winding roller and both ends of the pressure strip roller and the discharge guide roller are rotatably connected to a water-cooling box. A winding motor and a differential motor are fixedly installed on the surface of the water-cooling box. The output shaft of the winding motor is fixedly connected to the main winding roller, and the output shaft of the differential motor is fixedly connected to the pressure strip roller. The pressure strip roller is positioned directly above the discharge guide roller. Limiting ring grooves are formed on the peripheral surfaces of the guide roller and the discharge guide roller, corresponding to the position of each molded plastic strip. A rubber ring is fixedly installed on the peripheral surface of the pressure strip roller, corresponding to the position of each limiting ring groove.

[0015] As a preferred embodiment, the agitation assembly includes an agitation shaft rotatably connected to the water-cooled box. Two driven gears are fixedly installed on the circumferential side of the agitation shaft. The circumferential side of the two driven gears is respectively connected to two toothed plates at the lower shaking frame. A set of agitating plates arranged in a circular array are fixedly installed on the circumferential side of the agitation shaft.

[0016] A molding method for a plastic strapping forming device includes the following steps.

[0017] SS001, Preset: Before the plastic strapping forming operation, pre-select a designated mold plate and align it with the extrusion hole. Pre-fill the water cooling box with sufficient cooling water. After the water cooling box is filled with cooling water, the water inlet and outlet of the water cooling box are connected to the external cooling water circulation equipment.

[0018] SS002, Pre-discharge: In the initial operating environment, the extruder operates at a slow speed. After the extruder operates at a slow speed, the plastic strapping strip is slowly extruded. After the plastic strapping strip is extruded, with the assistance of human intervention, the formed plastic strip passes through the discharge mechanism, guide roller, pressure roller and discharge guide roller in sequence.

[0019] SS003, continuous molding. After step SS002, the extruder operates at a constant speed, and the winding motor and differential motor operate at a set speed difference. The raw material extruded by the extruder is formed through the forming strip hole. The formed strip is cooled and shaped in a water cooling box. During the cooling and shaping process, the reciprocating push rod drives the upper and lower shaking frames to move back and forth in opposite directions within a set stroke, thereby making the plastic strip shake during water cooling. After water cooling, the plastic forming strip is wound up by the main winding roller.

[0020] (III) Beneficial Effects

[0021] Compared with the prior art, the present invention provides a plastic strapping forming device and its forming method, which has the following beneficial effects.

[0022] 1. This invention, through the design of a guide cylinder, a rotary rotating cylinder, and other structures, enables the device to efficiently complete the hot extrusion molding of plastic strapping. Furthermore, during the hot extrusion molding process, this device transforms the traditional single-die-head structure of an extruder into a multi-die-head structure. By implementing multiple dies and a rotating switching structure, it is possible to quickly clean the inner wall of the die head after it becomes clogged. On the other hand, it is also possible to quickly switch the type of die head before operation, thereby allowing the forming specifications of the strapping to be switched and customized according to actual needs.

[0023] 2. This invention transforms the static water-cooling structure of the traditional extruder into a vibrating water-cooling structure by setting up a water-cooling box and a vibrating mechanism. During operation, under the action of the reciprocating push rod, the upper and lower vibrating frames can reciprocate in opposite directions within a set stroke. Through the occurrence of the above-mentioned movements, the contact efficiency between the plastic strip and the coolant can be effectively improved and the formation rate of the watertight film during the cooling of the plastic strip can be reduced, thereby effectively improving the forming speed and forming effect of the plastic binding strip. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a plastic strapping forming device according to the present invention;

[0025] Figure 2 For the present invention Figure 1 A magnified schematic diagram of the partial structure at point A in the middle;

[0026] Figure 3 For the present invention Figure 1 A schematic diagram of the cross-sectional structure;

[0027] Figure 4 For the present invention Figure 3 A magnified view of the structure at point B in the middle;

[0028] Figure 5 This is a schematic diagram of the structure of the indexing cylinder and the die tube of the present invention;

[0029] Figure 6 This is a schematic diagram of the reciprocating push rod and the liquid-dispensing plate of the present invention;

[0030] Figure 7 This is a schematic diagram of the material guide cylinder and extrusion orifice of the present invention;

[0031] Figure 8 This is a schematic diagram of the coupling and water-cooled box of the present invention;

[0032] Figure 9 This is a schematic diagram of the structure of the disturbance shaft of the present invention.

[0033] In the diagram: 1. Extruder; 2. Feed cylinder; 3. Extrusion orifice; 4. Indexing cylinder; 5. Die head tube; 6. Die plate; 7. Support; 8. Conversion motor; 9. Water cooling box; 10. Extrusion cylinder; 11. Feed hopper; 12. Extrusion motor; 13. Extrusion shaft; 14. Spiral extrusion blade; 15. Forming strip tube; 16. Cleaning press; 17. Waste outlet cavity; 18. Waste discharge pipe; 19. Coupling; 20. Upper shaking frame; 21. Lower shaking frame; 22. Reciprocating push rod; 23. Toothed plate; 24. Linkage toothed disc; 25. Liquid-dispensing plate; 26. Guide roller; 27. Main winding roller; 28. Pressure roller; 29. ​​Discharge guide roller; 30. Rewinding motor; 31. Differential motor; 32. Agitator shaft; 33. Driven gear; 34. Unblocking shovel; 35. Lifting push rod. Detailed Implementation

[0034] The present invention will be further described and illustrated below with reference to specific embodiments and the accompanying drawings:

[0035] Please see Figure 1-9The present invention provides a plastic strapping forming device, which includes an extruder 1, a guide cylinder 2 fixedly connected to the tail end of the extruder 1, an extrusion cylinder 10 fixedly connected to a water cooling box 9, a feed hopper 11 fixedly connected to the top of the extrusion cylinder 10, an extrusion motor 12 fixedly installed at the tail end of the extrusion cylinder 10, an extrusion shaft 13 fixedly installed at the output shaft end of the extrusion motor 12, a spiral extrusion blade 14 fixedly installed on the circumferential side of the extrusion shaft 13, the circumferential side of the spiral extrusion blade 14 rotatingly fitting with the extrusion cylinder 10, the tail end of the extrusion cylinder 10 fixedly connected to the guide cylinder 2, and a spiral heating coil installed inside the extrusion cylinder 10. The spiral heating coil is equipped with a temperature control circuit or a temperature control resistor during operation. By setting the temperature control circuit or temperature control resistor, the spiral heating coil can be kept in a set heating state during operation. Through the spiral heating coil, the material entering the extrusion cylinder 10 is effectively heated, thereby preventing the extruded material from forming a blockage inside the extrusion cylinder 10.

[0036] An extrusion hole 3 is provided at the bottom of the guide cylinder 2. A rotating cylinder 4 is rotatably connected to the circumferential side of the guide cylinder 2. A set of die tubes 5 arranged in a circular array are fixedly connected to the circumferential side of the rotating cylinder 4. The inner diameter of the die tubes 5 is adapted to the inner diameter of the extrusion hole 3.

[0037] Each die tube 5 has a die plate 6 installed on its surface. Inside the die plate 6, a set of forming strip tubes 15 arranged in a circumferential array are fixedly installed. Each forming strip tube 15 has a forming strip hole that communicates with the die plate 6. When the screw extrusion blades extrude the raw material, the extruded raw material is extruded through the extrusion hole 3 into the corresponding die tube 5. After the material enters the die tube 5, the raw material is extruded through the forming strip hole, thus completing the initial extrusion molding operation of the plastic strapping.

[0038] In actual production, the specifications of the forming strips 15 on each die plate 6 can be selected to be the same or different. When the specifications of the forming strips 15 on each die plate 6 are different, the extruder 1 can perform extrusion operations of multiple types or multiple specifications of strapping tape. When the specifications of the forming strips 15 on each die plate 6 are the same, the die plate 6 can be switched online after a certain die plate 6 is blocked, and the cleaning operation of the blocked die plate 6 can be completed.

[0039] A bracket 7 is fixedly installed on the top of the extruder 1, and a cleaning mechanism for cleaning the die plate 6 is slidably connected inside the bracket 7;

[0040] The cleaning mechanism includes a cleaning pressure table 16 slidably connected to the support 7 and a waste discharge chamber 17 opened above the guide cylinder 2 with an open top. The bottom of the waste discharge chamber 17 is fixedly provided with a waste guide slope, and the waste discharge chamber 17 is located inside the guide cylinder 2.

[0041] A vertically arranged lifting push rod 35 is fixedly installed on the side of the cleaning press 16. The periphery of the lifting push rod 35 is fixedly connected to the bracket 7. A blockage removal plier 34 adapted to the shape of the forming strip hole is fixedly installed on the bottom surface of the cleaning press 16 and at the position corresponding to each forming strip tube 15. A waste discharge pipe 18 connected to the waste discharge chamber 17 is fixedly installed on the side of the guide cylinder 2. The waste discharge chamber 17 is set to discharge the waste material and slag cleaned by the blockage removal plier 34. The cleaned waste material or slag is finally discharged through the waste discharge pipe 18.

[0042] A conversion motor 8 is mounted on the surface of the bracket 7. The output shaft of the conversion motor 8 is connected to the indexing cylinder 4. A driven bevel gear ring is fixedly mounted on the circumferential side of the indexing cylinder 4. A transmission bevel gear that meshes with the driven bevel gear ring is fixedly mounted on the output shaft of the conversion motor 8. The function of the conversion motor 8 is to change the arrangement angle and position of each die tube 5 on the indexing cylinder 4.

[0043] A water-cooled box 9 is fixedly installed at the bottom of the extruder 1. A water inlet pipe and a water outlet pipe are fixedly installed on the end face of the water-cooled box 9. Solenoid valves are installed inside the water inlet pipe and the water outlet pipe. When in use, the water inlet pipe and the water outlet pipe are connected to the external cooling water circulation equipment. After the external cooling water circulation equipment is connected to the water inlet pipe and the water outlet pipe, the coolant inside the water-cooled box 9 is maintained at the set temperature. A temperature probe is installed inside the water-cooled box 9. The temperature probe model is DS18B20.

[0044] The water-cooled box 9 is equipped with a discharge mechanism at its tail end, and a shaking mechanism and several agitation components that are linked to the shaking mechanism are installed inside the water-cooled box 9.

[0045] The shaking mechanism includes a coupling 19, an upper shaking frame 20, and a lower shaking frame 21. The surfaces of the upper shaking frame 20 and the lower shaking frame 21 are slidably connected to the water-cooled box 9. The inner wall of the water-cooled box 9 is fixedly installed with a guide plate and two symmetrically arranged guide rails. The peripheral side of the guide plate is slidably connected to the upper shaking frame 20, and the peripheral side of the two guide rails is slidably connected to the lower shaking frame 21. In use, both the upper shaking frame 20 and the lower shaking frame 21 can reciprocate in the horizontal direction.

[0046] A set of horizontally arranged reciprocating push rods 22 are fixedly installed on the surface of the upper shaking frame 20. The periphery of the set of reciprocating push rods 22 are all fixedly connected to the water-cooled box 9. Two symmetrically arranged toothed plates 23 are fixedly installed on the bottom surface and the top surface of the upper shaking frame 20.

[0047] The peripheral side of the coupling 19 is rotatably connected to the water-cooled box 9. Two symmetrically arranged linkage gear disks 24 are fixedly installed on the peripheral side of the coupling 19. The surfaces of the upper shaking frame 20 and the lower shaking frame 21 are driven by the linkage gear disks 24 through the gear plate 23. The linkage gear disks 24 are located between the upper shaking frame 20 and the lower shaking frame 21. A set of regularly distributed liquid-dispersing plates 25 are installed between the inner surfaces of the upper shaking frame 20 and the lower shaking frame 21. The top surface of the lower shaking frame 21 is driven by a set of agitation components through the gear plate 23. Several linearly arrayed guide rollers 26 are rotatably connected to the inner walls of the upper shaking frame 20 and the lower shaking frame 21.

[0048] The discharge mechanism includes a main winding roller 27, a pressure roller 28, and a discharge guide roller 29. The tail end of the main winding roller 27 and both ends of the pressure roller 28 and the discharge guide roller 29 are rotatably connected to the water cooling box 9. A winding motor 30 and a differential motor 31 are fixedly installed on the surface of the water cooling box 9. The output shaft end of the winding motor 30 is fixedly connected to the main winding roller 27, and the output shaft end of the differential motor 31 is fixedly connected to the pressure roller 28. The pressure roller 28 is located directly above the discharge guide roller 29.

[0049] The guide roller 26 and the discharge guide roller 29 have limit ring grooves on their peripheral sides corresponding to the position of each molded plastic strip. The pressure roller 28 has rubber rings fixedly installed on its peripheral side corresponding to the position of each limit ring groove. When the winding motor 30 winds up the cooled plastic binding strip, the winding tightness of the binding strip on the main winding roller 27 can be effectively controlled by controlling the speed difference between the winding motor 30 and the differential motor 31.

[0050] The agitation assembly includes an agitation shaft 32 that is rotatably connected to the water-cooled box 9. Two driven gears 33 are fixedly installed on the circumferential side of the agitation shaft 32. The circumferential side of the two driven gears 33 is respectively connected to two toothed plates 23 at the lower shaking frame 21. A set of agitation plates arranged in a circular array are fixedly installed on the circumferential side of the agitation shaft 32.

[0051] A molding method for a plastic strapping forming device includes the following steps.

[0052] SS001, Preset: Before the plastic strapping forming operation, a specified mold plate 6 is pre-selected and aligned with the extrusion hole 3. Sufficient cooling water is pre-filled into the water-cooling box 9. After the cooling water in the water-cooling box 9 is filled, the inlet and outlet of the water-cooling box 9 are connected to the external cooling water circulation equipment.

[0053] SS002, Pre-discharge: In the initial working environment, the extruder 1 operates at a slow speed. After the extruder 1 operates at a slow speed, the plastic strapping strip is slowly extruded. After the plastic strapping strip is extruded, with the assistance of human intervention, the formed plastic strip passes through the discharge mechanism, guide roller 26, pressure roller 28 and discharge guide roller 29 in sequence.

[0054] SS003, continuous molding. After step SS002, the extruder 1 operates at a constant speed, and the winding motor 30 and the differential motor 31 operate with a set speed difference. The raw material extruded by the extruder 1 is formed through the forming strip hole. The formed strip is cooled and shaped by the water cooling box 9. During the cooling and shaping process, the reciprocating push rod 22 drives the upper shaking frame 20 and the lower shaking frame 21 to move back and forth in opposite directions within the set stroke, thereby making the plastic strip form a shaking state during water cooling. After water cooling, the plastic forming strip is wound up by the main winding roller 27.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A plastic strapping forming device, comprising an extruder (1), characterized in that: The tail end of the extruder (1) is fixedly connected to a guide cylinder (2). An extrusion hole (3) is opened at the bottom of the guide cylinder (2). A rotary cylinder (4) is rotatably connected to the circumferential side of the guide cylinder (2). A set of die tubes (5) arranged in a circular array are fixedly connected to the circumferential side of the rotary cylinder (4). A die plate (6) is installed on the surface of each die tube (5). A bracket (7) is fixedly installed on the top of the extruder (1). A cleaning mechanism for cleaning the die plate (6) is slidably connected inside the bracket (7). A conversion motor (8) is installed on the surface of the bracket (7). The output shaft end of the conversion motor (8) is connected to the rotary cylinder (4) for transmission. A water cooling box (9) is fixedly installed at the bottom of the extruder (1). A discharge mechanism is installed at the tail end of the water cooling box (9). A shaking mechanism and several agitation components linked with the shaking mechanism are installed inside the water cooling box (9). The cleaning mechanism includes a cleaning press (16) slidably connected to the bracket (7) and a waste discharge chamber (17) opened above the guide cylinder (2) with an open top. A vertically arranged lifting push rod (35) is fixedly installed on the side of the cleaning press (16). The periphery of the lifting push rod (35) is fixedly connected to the bracket (7). A blockage removal plier (34) adapted to the shape of the forming strip hole is fixedly installed on the bottom surface of the cleaning press (16) and at the position corresponding to each forming strip (15). A waste discharge pipe (18) communicating with the waste discharge chamber (17) is fixedly installed on the side of the guide cylinder (2). The shaking mechanism includes a coupling (19), an upper shaking frame (20), and a lower shaking frame (21). The surfaces of the upper shaking frame (20) and the lower shaking frame (21) are slidably connected to the water-cooled box (9). A set of horizontally arranged reciprocating push rods (22) are fixedly installed on the surface of the upper shaking frame (20). The peripheral surfaces of the set of reciprocating push rods (22) are fixedly connected to the water-cooled box (9). Two symmetrically arranged toothed plates (23) are fixedly installed on the bottom and top surfaces of the upper shaking frame (20). The peripheral surface of the coupling (19) is rotatably connected to the water-cooled box (9). Two symmetrically arranged linkage gear discs (24) are fixedly installed. The surfaces of the upper shaking frame (20) and the lower shaking frame (21) are driven by the linkage gear discs (24) through the gear plate (23). The linkage gear discs (24) are located between the upper shaking frame (20) and the lower shaking frame (21). A set of regularly distributed liquid-dispersing plates (25) are installed between the inner surfaces of the upper shaking frame (20) and the lower shaking frame (21). The top surface of the lower shaking frame (21) is driven by a set of agitation components through the gear plate (23). Several linearly arrayed guide rollers (26) are rotatably connected to the inner walls of the upper shaking frame (20) and the lower shaking frame (21).

2. The plastic strapping forming device according to claim 1, characterized in that: The extruder (1) includes an extrusion cylinder (10) fixedly connected to a water-cooled box (9). The top of the extrusion cylinder (10) is fixedly connected to a feed hopper (11). An extrusion motor (12) is fixedly installed at the tail end of the extrusion cylinder (10). An extrusion shaft (13) is fixedly installed at the output shaft end of the extrusion motor (12). A spiral extrusion blade (14) is fixedly installed on the circumferential side of the extrusion shaft (13). The circumferential side of the spiral extrusion blade (14) rotates and fits against the extrusion cylinder (10). The tail end of the extrusion cylinder (10) is fixedly connected to a guide cylinder (2). A spiral heating coil is installed inside the extrusion cylinder (10).

3. The plastic strapping forming device according to claim 1, characterized in that: A set of forming strips (15) arranged in a circular array are fixedly installed inside the mold plate (6), and each forming strip (15) has a forming strip hole that communicates with the mold plate (6).

4. The plastic strapping forming device according to claim 3, characterized in that: The bottom of the waste outlet cavity (17) is fixedly provided with a waste guide slope, and the waste outlet cavity (17) is located on the inner side of the guide cylinder (2).

5. The plastic strapping forming device according to claim 1, characterized in that: The inner wall of the water-cooled box (9) is fixedly equipped with a guide plate and two symmetrically arranged guide rails. The peripheral side of the guide plate is slidably connected to the upper shaking frame (20), and the peripheral side of the two guide rails is slidably connected to the lower shaking frame (21).

6. The plastic strapping forming device according to claim 5, characterized in that: The discharge mechanism includes a main winding roller (27), a pressing roller (28), and a discharge guide roller (29). The tail end of the main winding roller (27), the two ends of the pressing roller (28), and the discharge guide roller (29) are rotatably connected to the water cooling box (9). A winding motor (30) and a differential motor (31) are fixedly installed on the surface of the water cooling box (9). The output shaft end of the winding motor (30) is fixedly connected to the main winding roller (27), and the output shaft end of the differential motor (31) is fixedly connected to the pressing roller (28). The pressing roller (28) is located directly above the discharge guide roller (29). Limiting ring grooves are opened on the peripheral side of the guide roller (26) and the discharge guide roller (29) corresponding to the position of each molded plastic strip. A rubber ring is fixedly installed on the peripheral side of the pressing roller (28) corresponding to the position of each limiting ring groove.

7. The plastic strapping forming device according to claim 6, characterized in that: The agitation assembly includes an agitation shaft (32) rotatably connected to the water-cooled box (9). Two driven gears (33) are fixedly installed on the circumferential side of the agitation shaft (32). The circumferential side of the two driven gears (33) are respectively connected to two toothed plates (23) at the lower shaking frame (21). A set of agitation plates arranged in a circular array are fixedly installed on the circumferential side of the agitation shaft (32).

8. A molding method for a plastic strapping forming device, characterized in that, The plastic strapping forming device as described in any one of claims 1-7 includes the following steps: SS001, Preset, Before the plastic strapping forming operation, a specified mold plate (6) is selected in advance and aligned with the extrusion hole (3). Sufficient cooling water is pre-filled into the water cooling box (9). After the cooling water in the water cooling box (9) is filled, the inlet and outlet of the water cooling box (9) are connected to the external cooling water circulation equipment. SS002, Pre-discharge, In the initial working environment, the extruder (1) operates slowly. After the extruder (1) operates slowly, the plastic binding strip is slowly extruded. After the plastic binding strip is extruded, with the assistance of human labor, the formed plastic strip is passed out sequentially through the discharge mechanism, guide roller (26), pressure roller (28) and discharge guide roller (29). SS003, continuous molding. After step SS002, the extruder (1) works at a constant speed, and the winding motor (30) and the differential motor (31) work with a set speed difference. The raw material extruded by the extruder (1) is formed through the forming strip hole. The formed strip is cooled and shaped by the water cooling box (9). During the cooling and shaping process, the reciprocating push rod (22) drives the upper shaking frame (20) and the lower shaking frame (21) to move back and forth in opposite directions within the set stroke, so that the plastic strip is formed in a shaking state when water cooling. After water cooling, the plastic forming strip is wound up by the main winding roller (27).

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