Continuous extruder for producing zipper packaging bag ribs by using waste plastics and forming method thereof

Abstract

The invention relates to a continuous extruder for producing zipper packaging bag ribs by using waste plastics and a forming method thereof, the continuous extruder comprises an extruder body, an extrusion plate is slidably mounted on the extruder body, and two groups of die holes are formed in the extrusion plate; the switching assembly is connected with the extrusion plate and can drive the extrusion plate to act, so that the materials can be extruded from the two groups of die holes respectively; the connecting part is installed on the extruder body, a dredging piece and a traction frame are elastically connected to the connecting part, the dredging piece is matched with a shoveling part at the end of the traction frame, and impurities on the outer side of the die hole can be removed; the side plate is connected with the switching assembly, a guide structure is arranged on the side plate, and the guide structure is matched with an embedding shaft connected with the traction frame and can drive the traction frame to transversely move relative to the extrusion plate; and the differential assembly is connected with the dredging piece and the traction frame, the differential assembly can make the traction frame and the dredging piece act in sequence, and the yield is increased.

Description

Technical Field

[0001] The invention relates to a continuous extruder for producing zipper packaging bag strips by utilizing waste plastics and a molding method thereof. Background Art

[0002] The zipper bag bone strip is a key component of the bag and is installed at the opening of the bag. Its special structural design can make the bag tightly sealed, effectively preventing food from getting damp and deteriorating, and maintaining the freshness and taste of the food.

[0003] In actual production, after processing waste plastics and ensuring that they meet safety standards, they can be used in the production of zipper bag ribs. This not only reduces environmental pollution, but also reduces production costs, providing a sustainable development solution for the food packaging industry.

[0004] During production, the treated waste plastic is first granulated and then melted and extruded through an extruder to produce zipper packaging bag bones. However, during the extrusion process, impurities are easily generated at the extruder head due to the extrusion temperature problem. The main manifestations are: when the temperature is too low, the material is not fully melted and has poor fluidity, and impurities accumulate on the outside of the extruder head; when the temperature is too high, the material degrades and carbonizes, and the residue adheres to the outside of the extruder head to form impurities. These impurities will cause the size of the bones to fluctuate, resulting in inconsistent width and thickness, affecting the coordination between the bones. Summary of the invention

[0005] The object of the present invention is to provide a continuous extruder and a molding method thereof for producing zipper packaging bag skeletons using waste plastics, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: The continuous extruder for producing zipper packaging bag strips using waste plastics includes: An extruder body, on which an extrusion plate is slidably mounted, and on which two groups of die holes are arranged; A switching component connected to the extrusion plate, the switching component can drive the extrusion plate to move so that the material can be extruded from the two groups of die holes respectively; A connecting part is mounted on the extruder body, a dredging piece and a traction frame are elastically connected to the connecting part, and the dredging piece cooperates with a scraping part at the end of the traction frame to remove impurities outside the die hole; A side plate connected to the switching assembly, wherein a guide structure is provided on the side plate, and the guide structure cooperates with the engaging shaft connected to the traction frame to drive the traction frame to move laterally relative to the extrusion plate; A differential assembly connects the clearing piece and the traction frame, and the differential assembly enables the traction frame and the clearing piece to move in sequence.

[0007] As a further solution of the present invention: the switching assembly comprises a connecting plate arranged at the side of the extrusion plate, and two groups of limiting grooves are formed on the connecting plate; The switching assembly also includes a supporting structure adapted to the limiting groove and a driving structure connected to the connecting plate, and a limiting wheel adapted to the limiting groove is rotatably mounted on the supporting structure.

[0008] As a further solution of the present invention: the supporting structure includes a hysteresis sleeve installed on the extruder body, a telescopic shaft is slidably installed in the hysteresis sleeve, one end of the telescopic shaft is rotatably connected to the limiting wheel, and the other end of the telescopic shaft is connected to the hysteresis sleeve through a first spring.

[0009] As a further solution of the present invention: the driving structure includes an electric telescopic rod installed on the extruder body, the action end of the electric telescopic rod is connected to the side plate, and the action end of the electric telescopic rod is provided with a retardation groove, and the retardation groove is slidably connected to the traction piece installed on the side of the connecting plate.

[0010] As a further solution of the present invention: a transverse axis is arranged on the connecting portion, a guide sleeve connected to the traction frame is slidably mounted on the transverse axis, and the guide sleeve is connected to the transverse axis via a second spring.

[0011] As a further solution of the present invention: a telescopic rod is provided on the connecting portion, the telescopic rod is connected to the dredging member, and a third spring is sleeved on the telescopic rod.

[0012] As a further solution of the present invention: the differential assembly includes a slide groove arranged on the traction frame, a slider is slidably installed in the slide groove, a pulling rod is rotatably installed on the slider, and the pulling rod is connected to the clearing member at one end away from the slider.

[0013] As a further solution of the present invention: the guide structure comprises a vertical groove arranged on the side plate, and horizontal grooves are arranged at both ends of the vertical groove, and one end of the horizontal groove away from the vertical groove is connected to the vertical groove through an inclined groove; A deflecting member is provided at the connection between the inclined slot and the vertical slot, and a torsion spring is provided on the rotating shaft of the deflecting member.

[0014] The method for forming zipper packaging bag bone strips by using waste plastics uses the above-mentioned continuous extruder, comprising: The waste plastic particles are poured into the extruder body, and the extruder body extrude the molten waste plastic particles from the die hole to form zipper packaging bag bones. After the predetermined extrusion time, the switching component is activated to make the clearing piece and the traction frame operate in sequence and separate from the extrusion plate. Then the extrusion plate switches its position, and after the position of the extrusion plate is switched, the clearing piece and the traction frame operate in sequence to remove impurities outside the die hole.

[0015] Compared with the prior art, the present invention has the following beneficial effects: By controlling the movement sequence of the extrusion plate, the scraping part and the dredging piece, firstly, the dredging piece can be separated from the die hole when the extrusion plate moves to avoid interference between the two. Secondly, after the extrusion plate is switched, the dredging piece will be inserted into the die hole first to push out the impurities in the die hole. Then, the scraping part can remove the impurities pushed out by the dredging piece and generated outside the die hole, so that the die hole can maintain good extrusion performance and improve the extrusion effect when it is switched to the extrusion station next time. By setting up a switching component, on the one hand, the two groups of die holes can be alternately switched to the extrusion station to improve the continuity of the extrusion operation; on the other hand, the position of the die hole can be positioned to avoid position deviation between the clearing piece and the die hole. By actively driving the extrusion plate into position before the side plate, the stability of the clearing piece inserted into the die hole can be improved, thereby ensuring the stable progress of the impurity removal operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a structural schematic diagram of an embodiment of a continuous extruder for producing zipper packaging bag strips using waste plastics.

[0017] Figure 2 for Figure 1 A magnified view of the structure at center.

[0018] Figure 3 The present invention is a schematic structural diagram of an extruder body, a switching component, a connecting part, a side plate and a differential component in one embodiment of a continuous extruder for producing zipper packaging bag ribs using waste plastics.

[0019] Figure 4 This is an exploded view of the structure of the switching component in one embodiment of a continuous extruder for producing zipper packaging bag ribs using waste plastics.

[0020] Figure 5 The present invention is a schematic structural diagram of the connecting part, the dredging member and the traction frame in one embodiment of a continuous extruder for producing zipper packaging bag skeleton strips using waste plastics.

[0021] Figure 6 for Figure 5 A magnified view of the structure at point B.

[0022] Figure 7An exploded view of the local structure of an embodiment of a continuous extruder for producing zipper packaging bag ribs using waste plastics.

[0023] Figure 8 The present invention is a schematic structural diagram of an electric telescopic rod and a side plate in one embodiment of a continuous extruder for producing zipper packaging bag ribs using waste plastics.

[0024] Fig. 9 This is a schematic structural diagram of the electric telescopic rod and the side panels at another angle in one embodiment of a continuous extruder for producing zipper packaging bag ribs using waste plastics.

[0025] Fig.10 The present invention is a schematic structural diagram of the side panels in one embodiment of a continuous extruder for producing zipper packaging bag ribs using waste plastics.

[0026] In the figure: 1. extruder body; 2. extrusion plate; 201. die hole; 202. guide part; 3. connecting plate; 301. limiting groove; 4. limiting wheel; 5. telescopic shaft; 6. first spring; 7. retardation sleeve; 8. traction member; 9. electric telescopic rod; 10. side plate; 1001. vertical groove; 1002. horizontal groove; 1003. inclined groove; 11. retardation groove; 12. deflection member; 13. traction frame; 1301. scraping part; 1302. slide groove; 14. interlocking shaft; 15. connecting part; 16. horizontal axis; 17. guide sleeve; 18. second spring; 19. telescopic rod; 20. third spring; 21. dredging member; 22. abutment part; 23. pulling rod; 24. slider. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0029] See also Figure 1 to Figure 10In an embodiment of the present invention, a continuous extruder for producing zipper packaging bag bones using waste plastics includes: an extruder body 1, a switching component, a connecting part 15, a side plate 10 and a differential component.

[0030] An extrusion plate 2 is slidably mounted on the extruder body 1, and two groups of die holes 201 are arranged on the extrusion plate 2, wherein a guide portion 202 is arranged on the side of the extrusion plate 2 facing the extruder body 1, and the guide portion 202 is sealed and slidably connected with the guide groove on the extruder body 1. This design of sealed and slidably connected can effectively prevent the molten waste plastic particles inside the extruder body 1 from flowing out into the equipment, thereby improving the reliability, sealing and service life of the equipment; with the cooperation of the guide portion 202 and the guide groove, the extrusion plate 2 can move smoothly in the vertical direction, thereby realizing the alternation of the two groups of die holes 201 with the extruder body 1 to complete the extrusion operation. This method of alternately using the die holes 201 not only improves the production efficiency of the equipment, but also can reduce the influence of the impurities on the bone strip molding by switching the die holes 201 when there are impurities on the outside of one group of die holes 201, thereby improving the product quality; at the same time, by cleaning the outside of the switched die holes 201, the die holes 201 can restore the original extrusion performance, and perform the extrusion effect of the predetermined quality at the next switch, thereby ensuring the continuous production of the bone strip; in addition, this design is also convenient for the maintenance and maintenance of the equipment, reduces the downtime of the equipment, and improves the production efficiency and economic benefits.

[0031] The switching assembly is connected to the extrusion plate 2, and the switching assembly can drive the extrusion plate 2 to move in the vertical direction of space, so that the material can be extruded from the two groups of die holes 201 respectively. Specifically, the switching assembly includes a connecting plate 3 arranged on the side of the extrusion plate 2, and two groups of limiting grooves 301 are formed on the connecting plate 3, and the two groups of limiting grooves 301 correspond to the two groups of die holes 201 respectively. The switching assembly also includes a supporting structure adapted to the limiting groove 301 and a driving structure connected to the connecting plate 3. A limiting wheel 4 adapted to the limiting groove 301 is rotatably mounted on the supporting structure. In the initial state, the supporting structure makes the limiting wheel 4 tend to move toward the connecting plate 3, so that when the limiting wheel 4 is in the limiting groove 301, the position of the connecting plate 3 and the extrusion plate 2 can be locked to ensure the stability of the extrusion plate 2 and avoid the extrusion plate 2 from moving during the extrusion process, which may cause the extruded bone strip to twist and deform.

[0032] Furthermore, when the limiting wheel 4 is in the limiting groove 301, the rotating shaft of the limiting wheel 4 is located on the side of the connecting plate 3 away from the limiting groove 301. This arrangement enables the limiting wheel 4 to be disengaged from the limiting groove 301 when the driving structure drives the connecting plate 3 to move, and when the limiting wheel 4 is combined with another limiting groove 301, the position of the mold hole 201 is switched, and after the switching, when the limiting wheel 4 continues to cooperate with the limiting groove 301, the locking effect on the extrusion plate 2 can be maintained.

[0033] It should be noted that in the process of switching the die hole 201, due to the brief blockage in the extruder body 1, the pressure in the extruder body 1 will increase. When the die hole 201 is connected to the extruder body 1 again, the increased pressure will be released instantly, resulting in bubbles, deformation and other undesirable phenomena in the extruded bone strips at this time. Therefore, the bone strips extruded within the predetermined time of switching extrusion need to be removed in subsequent production.

[0034] Specifically, the supporting structure includes a hysteresis sleeve 7 installed on the extruder body 1, a telescopic shaft 5 is slidably installed in the hysteresis sleeve 7, one end of the telescopic shaft 5 is rotatably connected to the limiting wheel 4, and the other end of the telescopic shaft 5 is connected to the hysteresis sleeve 7 through a first spring 6. The driving structure includes an electric telescopic rod 9 installed on the extruder body 1, the action end of the electric telescopic rod 9 is connected to a side plate 10, and a hysteresis groove 11 is provided on the action end of the electric telescopic rod 9, and the hysteresis groove 11 is slidably connected to the traction member 8 installed on the side of the connecting plate 3.

[0035] In the initial state, the first spring 6 is in a compressed state. At this time, the first spring 6 has a force pushing the telescopic shaft 5 toward the connecting plate 3. The force acts on the limiting wheel 4, which can ensure that the limiting wheel 4 is always in rolling contact with the side wall of the connecting plate 3, and when the limiting wheel 4 moves into the limiting groove 301, it can immediately enter the limiting groove 301 to lock the connecting plate 3 and the extrusion plate 2, thereby ensuring the stability of the basic plate 2 after the position is switched.

[0036] Since the telescopic shaft 5 and the hysteresis sleeve 7 are in a sliding connection state, the telescopic shaft 5 can only drive the limiting wheel 4 to move toward or away from the extruder body 1, that is, the telescopic shaft 5 can always maintain a state of being perpendicular to the extrusion plate 2, further ensuring the position stability of the extrusion plate 2 when the limiting wheel 4 cooperates with the limiting groove 301, ensuring that the clearing piece 21 can be accurately inserted into the die hole 201 when it is subsequently actuated, thereby preventing the clearing piece 21 from being unable to be inserted into the die hole 201 due to misalignment between the two, causing the impurities in the die hole 201 to be unable to be cleaned or the structure of the clearing piece 21 itself to be damaged.

[0037] It should also be noted that a limit groove is provided along the length direction of the telescopic shaft 5, and the limit groove is slidably matched with the limit block provided on the hysteresis sleeve 7, so as to realize the axial self-locking between the telescopic shaft 5 and the hysteresis sleeve 7, and avoid the relative rotation of the telescopic shaft 5 relative to the hysteresis sleeve 7, which causes the limiting wheel 4 to follow the deflection of the telescopic shaft 5 and cannot cooperate well with the limiting groove 301. In addition to the above method, the cross-section of the telescopic shaft 5 can also be set to be non-circular, which can also achieve the same effect.

[0038] When the action end of the electric telescopic rod 9 moves, it can drive the retardation groove 11 connected thereto to move, wherein the length of the retardation groove 11 is greater than the length of the traction member 8, so that only when the end of the retardation groove 11 deviates from its movement direction and abuts against the end of the traction member 8, the retardation groove 11 can be used to cooperate with the traction member 8 to drive the connecting plate 3 and the extrusion plate 2 to move, and after the connecting plate 3 and the extrusion plate 2 move to a predetermined position, when the limiting wheel 4 cooperates with the limiting groove 301, the connecting plate 3 can actively drive the extrusion plate 2 to move at a speed faster than the movement speed of the action end of the electric telescopic rod 9, so that the extrusion plate 2 is positioned in advance, avoiding inaccurate position state of the extrusion plate 2 caused by the stroke control error of the action end of the electric telescopic rod 9, and further avoiding the misalignment between the dredging member 21 and the die hole 201 after the extrusion plate 2 completes the position switching.

[0039] See also Figure 5~Figure 7 The connecting portion 15 is installed on the extruder body 1, and a clearing piece 21 and a traction frame 13 are elastically connected to the connecting portion 15. The clearing piece 21 cooperates with the scraping portion 1301 at the end of the traction frame 13 to remove impurities outside the die hole 201. In detail, the elastic connection includes: a transverse axis 16 is provided on the connecting portion 15, and a guide sleeve 17 connected to the traction frame 13 is slidably installed on the transverse axis 16, and the guide sleeve 17 is connected to the transverse axis 16 by a second spring 18; a telescopic rod 19 is provided on the connecting portion 15, and the telescopic rod 19 is connected to the clearing piece 21, and a third spring 20 is sleeved on the telescopic rod 19, and an abutting portion 22 is provided on the clearing piece 21. When the abutting portion 22 abuts against the extrusion plate 2, the end of the clearing piece 21 away from the third spring 20 is coplanar with the outer side of the extrusion plate 2.

[0040] In this embodiment, two groups of symmetrically arranged clearing pieces 21 cooperate with two groups of traction frames 13. In the initial state, one end of the two groups of clearing pieces 21 away from the third spring 20 is coplanar with the side of the extrusion plate 2 away from the extruder body 1, and the corresponding two groups of traction frames 13 are in a closed state. At this time, only one group of mold holes 201 has a clearing piece 21 inserted therein.

[0041] Before the extrusion plate 2 moves, the two groups of traction frames 13 move away from each other, so that the second spring 18 is stretched by a certain displacement, and then the differential assembly moves to drive the clearing piece 21 away from the extrusion plate 2. During this process, the third spring 20 is compressed until the clearing piece 21 is completely misaligned with the extrusion plate 2, and then the extrusion plate 2 switches its position; after the position is switched, the clearing piece 21 and the traction frame 13 are reset synchronously. During the reset, the clearing piece 21 is first inserted into the die hole 201 to push out the impurities in the die hole 201, and then the scraping parts 1301 on the two groups of traction frames 13 move to the die hole 201 to scrape away the impurities outside the die hole 201 and pushed out by the clearing piece 21, so as to prevent the impurities from affecting the quality of the bone strips during the next switch.

[0042] The differential assembly connects the clearing piece 21 and the traction frame 13. The differential assembly enables the traction frame 13 and the clearing piece 21 to move in sequence. The differential assembly includes a slide groove 1302 arranged on the traction frame 13. A slider 24 is slidably installed in the slide groove 1302. A pulling rod 23 is rotatably installed on the slider 24. The end of the pulling rod 23 away from the slider 24 is connected to the clearing piece 21.

[0043] In the initial state, under the elastic force of the third spring 20, the end of the clearing piece 21 remains coplanar with the outside of the extrusion plate 2. At this time, the third spring 20 is in a compressed state. At the same time, the abutment portion 22 is tightly abutted against the inner side of the extrusion plate 2, further ensuring the stability of the end of the clearing piece 21 being coplanar with the outside of the extrusion plate 2, effectively avoiding the problem of insufficient movement stroke of the clearing piece 21 resulting in the inability to completely remove impurities in the mold hole 201, and also preventing interference with the scraping portion 1301 caused by excessive stroke.

[0044] When the two groups of traction frames 13 are pulled and move away from each other, the slider 24 can slide freely in the slide groove 1302, and the clearing piece 21 remains stationary. When the traction frame 13 moves until the die hole 201 is completely exposed, the slider 24 reaches one end of the slide groove 1302. As the traction frame 13 continues to move, the slider 24 begins to move synchronously with the traction frame 13, and drives the clearing piece 21 to move through the pulling rod 23, so that the third spring 20 is further stretched until the clearing piece 21 is completely separated from the extrusion plate 2; at this time, the position of the extrusion plate 2 is switched, and after the switching is completed, the traction frame 13 and the clearing piece 21 start to move in the opposite direction. During this process, the clearing piece 21 can enter the die hole 201 first, and then the shoveling part 1301 moves relatively close to the outer surface of the extrusion plate 2, thereby effectively removing impurities inside and outside the die hole 201, laying a good foundation for subsequent extrusion operations.

[0045] See also Figure 5 , Figure 7~Figure 10The side plate 10 is connected to the electric telescopic rod 9, and a guide structure is provided on the side plate 10. The guide structure cooperates with the interlocking shaft 14 connected to the traction frame 13, and can drive the traction frame 13 to move horizontally relative to the extrusion plate 2; The guide structure includes a vertical groove 1001 provided on the side plate 10, and horizontal grooves 1002 are provided at both ends of the vertical groove 1001. One end of the horizontal groove 1002 away from the vertical groove 1001 is connected to the vertical groove 1001 through an inclined groove 1003; A deflection member 12 is provided at the connection between the inclined slot 1003 and the vertical slot 1001, and a torsion spring is provided on the rotating shaft of the deflection member 12; As can be seen from the above, the length of the hysteresis groove 11 is greater than the length of the traction member 8. When the action end of the electric telescopic rod 9 starts to move, the traction member 8 moves relative to the hysteresis groove 11. At this time, the extrusion plate 2 is stationary, and the side plate 10 follows the action end of the electric telescopic rod 9 to move, driving the interlocking shaft 14 to move along the inclined groove 1003, driving the two groups of traction frames 13 away from each other. When the traction frame 13 moves to a predetermined position and the clearing member 21 is separated from the extrusion plate 2, the interlocking shaft 14 reaches the end of the inclined groove 1003, acts on the deflection member 12 to deflect it, and at the same time, the end of the hysteresis groove 11 is fitted with the end of the traction member 8, and the position of the extrusion plate 2 is switched. Since the clearing member 21 is separated from the extrusion plate 2, interference with the clearing member 21 during movement of the extrusion plate 2 is avoided.

[0046] When the side plate 10 is about to move to the end of its stroke, the limiting groove 301 cooperates with the limiting wheel 4 to actively drive the extrusion plate 2 to move and lock it. When the side plate 10 reaches the end of its stroke, the engaging shaft 14 moves to the other end of the vertical groove 1001. Under the action of the second spring 18 and the third spring 20, the engaging shaft 14 moves along the horizontal groove 1002, driving the clearing piece 21 and the traction frame 13 to move and clean impurities inside and outside the mold hole 201.

[0047] In this embodiment, the deflection member 12 can only move toward the vertical groove 1001. When the interlocking shaft 14 moves from the inclined groove 1003 to the vertical groove 1001, the deflection member 12 deflects once and then resets under the action of the torsion spring. As the interlocking shaft 14 continues to move, when it abuts against another deflection member 12, the deflection member 12 guides the interlocking shaft 14 to continue to move along the vertical groove 1001 and prevents it from moving along the other inclined groove 1003, ensuring that after the extrusion plate 2 is in place, the clearing member 21 and the traction frame 13 will move again to improve the orderliness of the movement of each component.

[0048] As an embodiment of the present invention, a molding method for producing zipper packaging bag bone strips using waste plastics is also proposed, using the above-mentioned continuous extruder, comprising: The waste plastic particles are poured into the extruder body 1, and the extruder body 1 extrude the molten waste plastic particles from the die hole 201 to form zipper packaging bag bones. After the predetermined extrusion time, the switching component is activated to make the clearing piece 21 and the traction frame 13 operate in sequence and separate from the extrusion plate 2. Then the extrusion plate 2 switches its position, and after the position of the extrusion plate 2 is switched, the clearing piece 21 and the traction frame 13 operate in sequence to remove impurities outside the die hole 201.

[0049] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0050] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A continuous extruder for producing zipper packaging bag strips using waste plastics, characterized in that: include: An extruder body (1), an extrusion plate (2) being slidably mounted on the extruder body (1), and two groups of die holes (201) being provided on the extrusion plate (2); A switching component connected to the extrusion plate (2), the switching component being capable of driving the extrusion plate (2) to move so that the material can be extruded from the two groups of die holes (201) respectively; A connecting portion (15) is mounted on the extruder body (1), the connecting portion (15) being elastically connected to a clearing piece (21) and a traction frame (13), the clearing piece (21) cooperating with a scraping portion (1301) at the end of the traction frame (13) to remove impurities outside the die hole (201); A side plate (10) connected to the switching assembly, wherein a guide structure is provided on the side plate (10), wherein the guide structure cooperates with a fitting shaft (14) connected to the traction frame (13) to drive the traction frame (13) to move laterally relative to the extrusion plate (2); A differential assembly connects the clearing member (21) and the traction frame (13), and the differential assembly can cause the traction frame (13) and the clearing member (21) to move in sequence.

2. The continuous extruder for producing zipper packaging bag strips using waste plastics according to claim 1, characterized in that: The switching assembly comprises a connecting plate (3) arranged on the side of the extrusion plate (2), and two groups of limiting grooves (301) are formed on the connecting plate (3); The switching assembly further comprises a supporting structure adapted to the limiting groove (301) and a driving structure connected to the link plate (3); a limiting wheel (4) adapted to the limiting groove (301) is rotatably mounted on the supporting structure.

3. The continuous extruder for producing zipper packaging bag strips using waste plastics according to claim 2, characterized in that: The support structure comprises a hysteresis sleeve (7) mounted on the extruder body (1), a telescopic shaft (5) being slidably mounted in the hysteresis sleeve (7), one end of the telescopic shaft (5) being rotatably connected to the limiting wheel (4), and the other end of the telescopic shaft (5) being connected to the hysteresis sleeve (7) via a first spring (6).

4. The continuous extruder for producing zipper packaging bag strips using waste plastics according to claim 2, characterized in that: The driving structure comprises an electric telescopic rod (9) mounted on the extruder body (1), the action end of the electric telescopic rod (9) being connected to a side plate (10), and a retardation groove (11) being provided on the action end of the electric telescopic rod (9), and the retardation groove (11) being slidably connected to a traction member (8) mounted on a side of the connecting plate (3).

5. The continuous extruder for producing zipper packaging bag strips using waste plastics according to claim 1, characterized in that: A transverse axis (16) is provided on the connecting portion (15), a guide sleeve (17) connected to the traction frame (13) is slidably mounted on the transverse axis (16), and the guide sleeve (17) and the transverse axis (16) are connected via a second spring (18).

6. The continuous extruder for producing zipper packaging bag strips using waste plastics according to claim 1, characterized in that: A telescopic rod (19) is provided on the connecting portion (15), the telescopic rod (19) is connected to the dredging member (21), and a third spring (20) is sleeved on the telescopic rod (19).

7. The continuous extruder for producing zipper packaging bag strips using waste plastics according to claim 1, characterized in that: The differential assembly comprises a slide groove (1302) arranged on the traction frame (13), a slider (24) is slidably installed in the slide groove (1302), a pulling rod (23) is rotatably installed on the slider (24), and one end of the pulling rod (23) away from the slider (24) is connected to the clearing member (21).

8. The continuous extruder for producing zipper packaging bag strips using waste plastics according to claim 1, characterized in that: The guide structure comprises a vertical groove (1001) arranged on the side plate (10), horizontal grooves (1002) are arranged at both ends of the vertical groove (1001), and one end of the horizontal groove (1002) away from the vertical groove (1001) is connected to the vertical groove (1001) via an inclined groove (1003); A deflection member (12) is provided at the connection between the inclined slot (1003) and the vertical slot (1001), and a torsion spring is provided on the rotating shaft of the deflection member (12).

9. A method for forming zipper packaging bag bone strips using waste plastics, characterized in that: Applicable to the continuous extruder as claimed in any one of claims 1 to 8, comprising: Waste plastic particles are poured into an extruder body (1), and the extruder body (1) extrude the molten waste plastic particles from a die hole (201) to form a zipper packaging bag bone strip. After a predetermined extrusion time, the components are switched to operate, so that the clearing piece (21) and the traction frame (13) are operated in sequence and separated from the extrusion plate (2). Subsequently, the extrusion plate (2) switches its position, and after the position of the extrusion plate (2) is switched, the clearing piece (21) and the traction frame (13) are operated in sequence to remove impurities outside the die hole (201).

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