Injection molding machine for preparing color master batch from regenerated plastic and use method of injection molding machine

Abstract

The invention discloses an injection molding machine for preparing color master batches from recycled plastics and a use method thereof, and belongs to the technical field of color master batch preparation. A pipe body is supported through a base, a spiral conveying shaft is arranged in the pipe body to convey molten raw materials, multiple sets of injection molding nozzles are arranged at the end of an injection molding pipe, and a rotary conical head assembly capable of axially moving is matched to achieve mechanical dredging. The cooling system is integrated in the cooling box, cooling water is stirred through the reciprocating stirring plate to maintain the low-temperature environment, and color master batch fishing and discharging are completed in cooperation with the rotating material conveying plate. And the pelletizing device adopts a reciprocating driving mechanism to realize fixed-length cutting. A rotary conical head assembly driven by a chain wheel and a chain is arranged at the end of the injection molding nozzle, and a composite motion mechanism with stirring and discharging functions and a transmission structure achieving multi-procedure linkage through a cam mechanism are arranged in the cooling box. The industrial problems that the injection molding nozzle is blocked, maintenance is tedious, and bonding is caused by cooling water temperature rise are effectively solved, and the color master batch production efficiency and the finished product quality are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of masterbatch preparation, and particularly to an injection molding machine for preparing masterbatch from recycled plastics and a method for using the same. Background Art

[0002] Masterbatch, as a polymer composite coloring material, the formulation and process flow in its production process are crucial. The design of a scientific formulation can achieve high coloring power and excellent dispersibility of the masterbatch, while a standardized production process is the key to ensuring the batch stability and quality consistency of the product. During the preparation of the masterbatch, the recycled plastics need to be crushed and then mixed evenly with pigments and additives, and then go through the processes of melt extrusion and cooling pelletizing.

[0003] In the prior art, there are still the following deficiencies when preparing masterbatch by an injection molding machine:

[0004] 1. When the molten raw material is extruded through the injection nozzle by the injection molding machine, due to temperature fluctuations or insufficient shear heat generation, the molten raw material is likely to solidify and block in the flow channel of the injection nozzle. After long-term use, it is easy to cause the injection nozzle to be blocked, forcing the injection molding machine to stop for maintenance, and the traditional dredging method requires disassembling the injection nozzle, which is cumbersome to operate.

[0005] 2. The molten raw material enters the water tank for cooling and forming after extrusion, and then the pelletizing device completes the pelletizing. During long-term operation, the continuous increase in the cooling water temperature will lead to a decrease in the raw material cooling rate, resulting in the adhesion of the masterbatch after pelletizing due to the release of residual stress, affecting the quality of the finished product.

[0006] In view of the above problems, the present invention document proposes an injection molding machine for preparing masterbatch from recycled plastics and a method for using the same. Summary of the Invention

[0007] The purpose of the present invention is to solve the disadvantages that the dredging of the existing injection nozzle is time-consuming and laborious, the cooling water gradually warms up affecting the cooling effect, and the masterbatch formed after pelletizing is prone to adhesion, and to propose an injection molding machine for preparing masterbatch from recycled plastics and a method for using the same.

[0008] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0009] An injection molding machine for preparing masterbatch from recycled plastics, including a base, a tube body fixed at the top, a spiral feeding shaft rotatably connected in the tube body, an injection tube fixedly communicated with one side of the tube body, a plurality of injection nozzles provided on one side of the injection tube, a transmission rod rotatably connected to one side of the tube body and coaxially fixed with the spiral feeding shaft, and further including:

[0010] The cooling box is arranged on one side of the base and is used to cool the strip extruded by the injection nozzle. A U-shaped moving frame is slidably connected to the top of the cooling box. A plurality of rotating cone heads are rotatably connected through one side of the U-shaped moving frame. A dredging structure for driving the rotating cone heads to rotate synchronously and reciprocally insert into the injection nozzle is arranged on the U-shaped moving frame;

[0011] The U-shaped frame is fixedly arranged on the top of the cooling box. Feeding rollers are rotatably arranged in both the U-shaped frame and the cooling box. A cutter is slidably connected to one side of the U-shaped frame away from the pipe body. A driving structure for driving the cutter to reciprocate is arranged in the U-shaped frame;

[0012] The transmission structure includes two cams fixedly connected by a pin rod. The transmission rod is fixedly connected to one cam. A stirring plate is slidably connected in the cooling box and a feeding plate is rotatably connected. The stirring plate is linked with the cam through a pin rod to stir the cooling water. The feeding plate is linked with the stirring plate through a connecting rod mechanism to fish out the color masterbatch.

[0013] As a further improvement of the above technical solution:

[0014] The dredging structure includes:

[0015] The connecting plate is slidably sleeved on the guide rod fixed on the pipe body. Adjacent rotating cone heads are driven by a sprocket chain. The transmission rod penetrates through the U-shaped moving frame and is sleeved with a first synchronous wheel. A second synchronous wheel is fixedly connected to the end of one rotating cone head. The first synchronous wheel and the second synchronous wheel are driven by a synchronous belt;

[0016] The connecting rod has one end hinged to the connecting plate and the other end fixedly connected to the sliding block. A track groove is arranged on the outer wall of the left cam. The sliding block is slidably matched with the track groove to drive the U-shaped moving frame to move horizontally and reciprocally;

[0017] The limiting vertical plate is fixedly connected to the top of the guide rod and penetrates through the through groove of the connecting rod to limit the swinging range of the connecting rod.

[0018] The outer peripheral surface of the rotating cone head is provided with spiral scraping blades, and the spiral direction of the spiral scraping blades is consistent with the rotating direction of the rotating cone head.

[0019] The driving structure includes:

[0020] The gearbox is fixedly arranged on the top of the U-shaped frame, and its input shaft is fixedly connected to the driven rod. The driven rod is fixedly connected to the right cam;

[0021] The rotating disk is fixedly connected to the output shaft of the gearbox, and a pin shaft is fixedly connected to its eccentric position;

[0022] The frame body is fixedly connected to the top of the cutter and is slidably matched with the pin shaft to convert the rotation of the rotating disk into the reciprocating linear motion of the cutter.

[0023] The transmission structure further includes:

[0024] The U-shaped plate is slidably arranged in the cooling box and fixedly connected to the toggle plate, and a clearance groove is provided on the inner side of the U-shaped plate for slidingly cooperating with the pin rod;

[0025] The T-shaped support plate is fixed in the cooling box, and sliding grooves are provided on both sides of the plate. Two connecting rods are respectively slidably arranged in the sliding grooves and one end is fixedly connected to the T-shaped plate. The top end of the T-shaped plate abuts against the bottom end of the conveying plate to drive it to rotate. The conveying plate and the toggle plate are both provided with a plurality of through holes. One side of the conveying plate is fixedly connected to a baffle bar, and the side of the T-shaped support plate close to the tube body is fixedly connected to a plurality of limiting rings, and the central axis of the limiting ring is parallel to the conveying direction of the feed roller. The connecting plate is detachably connected to the U-shaped movable frame through a damping shaft, and the two ends of the damping shaft are fixedly connected to clamping plates. The side of the T-shaped support plate away from the toggle plate is slidably connected to two shielding plates, and the top of the shielding plate passes through the T-shaped support plate and slidably cooperates with the L-shaped guide rod through the strip groove.

[0026] In the present application, a method for using an injection molding machine for preparing masterbatch from recycled plastics comprises the following steps:

[0027] S1. The raw material is put into the tube body through the injection hopper, and the motor drives the spiral feed shaft to rotate and transport the raw material to the position of the melting ring sleeve. After melting, the raw material is extruded and enters the cooling box through the injection tube and the injection nozzle to be cooled and formed into a strip; after the strip is limited by the limit ring, it is transported by two feed rollers driven by the motor;

[0028] S2, the spiral feed shaft drives the transmission rod to rotate, and the cam and the pin rod, as well as the pin shaft and the frame body cooperate to drive the cutter to move up and down to complete the pelletizing; after pelletizing, the masterbatch falls into the cooling box for further cooling;

[0029] S3. When the transmission rod rotates, the toggle plate moves up and down to stir the cooling water and drive the strips to shake, accelerating cooling; at the same time, the toggle plate drives the conveying plate to rotate through the connecting rod and T-plate, picks up the masterbatch and transports it to one side of the cooling box;

[0030] S4, when the connecting rod moves, it pushes the shielding plate to move up and down to reset, shielding the sliding groove to prevent the masterbatch from entering the area on the side of the T-shaped support plate away from the feed plate through the sliding groove;

[0031] S5. After the preparation is completed, clean water is injected to clean the inside of the tube body; the clamping plate is rotated to the bottom, and the connecting plate and the U-shaped moving frame are fixed by the cooperation of the damping shaft and the clamping plate; the spiral feed shaft is driven to rotate the cleaning tube body, and the first synchronous wheel, the second synchronous wheel and the synchronous belt, as well as the sprocket and the chain, drive multiple rotating cone heads to rotate synchronously; the cam pushes the U-shaped moving frame to move back and forth left and right through the cooperation of the track groove, the sliding block and the connecting rod, so that the rotating cone head is reciprocated and inserted into the injection nozzle for dredging, the scraper removes the solidified raw materials, and the dredging operation is completed by flushing with clean water.

[0032] Beneficial effects: In the present invention, two adjacent rotating cone heads are connected through sprockets and chains, the second synchronous wheel is connected to the first synchronous wheel through a synchronous belt, one side of the connecting plate is rotatably connected with a connecting rod, the outer wall of the cam located on the left side is provided with a track groove, and the bottom end of the connecting rod is slidably matched with the track groove through a sliding block; the transmission rod drives the plurality of rotating cone heads to rotate through the cooperation of the first synchronous wheel, the second synchronous wheel and the synchronous belt, the cam pushes the sliding block to move up and down reciprocatingly through the cooperation of the track groove and the sliding block, and the sliding block drives the connecting plate and the U-shaped moving frame to move back and forth left and right under the action of the connecting rod, and the rotating rotating cone head can be reciprocally inserted into the injection nozzle to dredge the injection nozzle;

[0033] In the present invention, the toggle plate is slidably matched with the pin rod through the give way groove, one end of the toggle plate is fixed with a T-shaped plate through a connecting rod, and a feed plate is rotatably connected in the base, and the top of the T-shaped plate touches the bottom of the feed plate; when the transmission rod drives the cam and the pin rod to rotate, the pin rod cooperates with the give way groove to drive the toggle plate to move up and down, and promotes heat exchange by stirring the cooling water, maintains the cooling water at a low temperature, ensures that the cooling water can effectively play the role of cooling and forming, and can also drive the strip to shake in the cooling water, so that the strip fully contacts the cooling water, and accelerates the cooling and forming; in addition, it can also drive the feed plate to rotate, pick up the masterbatch after cooling again, and avoid the masterbatch from sticking;

[0034] In the present invention, a transmission rod is fixed to one end of the spiral feed shaft, one end of the transmission rod is fixedly connected to a cam located on the left side, a pin rod is fixed between the two cams, a driven rod is fixed to one side of the cam located on the right side, and the driven rod is fixedly connected to the input shaft of the gearbox, and the outer wall of the cam located on the left side is provided with a track groove that slides with the sliding block; when the spiral feed shaft is running to extrude raw materials, it can sequentially drive the dredging structure, the driving structure and the transmission structure, the linkage effect is extremely strong, the use of the driving structure is reduced, and the production cost of the injection molding machine is greatly reduced.

[0035] In the present invention, the cooling of cooling water can be accelerated to ensure the cooling effect of cooling water, and the masterbatch can be cooled again after pelletizing to avoid the masterbatch from sticking. In addition, the injection nozzle can be easily unblocked, saving time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic diagram of the three-dimensional structure of an injection molding machine for preparing masterbatch from recycled plastics provided in Example 1 of the present invention;

[0037] Figure 2 A three-dimensional cross-sectional structural schematic diagram of an injection molding machine for preparing masterbatch from recycled plastics provided in Example 1 of the present invention;

[0038] Figure 3 A schematic cross-sectional view of an injection molding machine for preparing masterbatch from recycled plastics provided in Example 1 of the present invention;

[0039] Figure 4 A schematic three-dimensional cross-sectional structure diagram of a cooling box of an injection molding machine for preparing masterbatch from recycled plastics provided in Example 1 of the present invention;

[0040] Figure 5 A schematic diagram of a three-dimensional exploded structure of an injection nozzle, a rotating cone head, a cam and a connecting rod of an injection molding machine for preparing masterbatch from recycled plastics provided in Example 1 of the present invention;

[0041] Figure 6 A schematic diagram of a three-dimensional exploded structure of a U-shaped moving frame, a connecting rod and a cam of an injection molding machine for preparing masterbatch from recycled plastics provided in Example 1 of the present invention;

[0042] Figure 7 A three-dimensional cross-sectional structural schematic diagram of a U-shaped moving frame and a connecting plate of an injection molding machine for preparing masterbatch from recycled plastics provided in Example 1 of the present invention;

[0043] Figure 8 A schematic diagram of the three-dimensional structure of a cam and a pin of an injection molding machine for preparing masterbatch from recycled plastics provided in Example 1 of the present invention;

[0044] Figure 9 A schematic diagram of a three-dimensional exploded structure of a toggle plate, a T-plate and a feed plate of an injection molding machine for preparing masterbatches from recycled plastics provided in Example 1 of the present invention;

[0045] Figure 10 A schematic diagram of the three-dimensional structure of a T-shaped support plate, a U-shaped frame and a limiting ring of an injection molding machine for preparing masterbatch from recycled plastics provided in Example 1 of the present invention;

[0046] Figure 11 A schematic diagram of a three-dimensional exploded structure of a cutter, a frame and a rotating disk of an injection molding machine for preparing masterbatch from recycled plastics provided in Example 1 of the present invention;

[0047] Figure 12 This is a schematic diagram of the three-dimensional structure of a sliding groove and a shielding plate of an injection molding machine for preparing masterbatch from recycled plastic provided in Example 2 of the present invention.

[0048] In the figure: 1, base; 2, tube body; 3, injection hopper; 4, spiral feed shaft; 5, ring sleeve; 6, heating ring; 7, injection tube; 8, injection nozzle; 9, cooling box; 10, T-shaped support plate; 11, U-shaped frame; 12, feed roller; 13, gear; 14, limit ring; 15, cutter; 16, frame; 17, gearbox; 18, rotating disk; 19, pin shaft; 20, driven rod; 21, L-shaped rod; 22, cam; 23, pin rod; 24, U-shaped plate; 25. Give way groove; 26. Toggle plate; 27. Connecting rod; 28. Sliding groove; 29. T-plate; 30. Feed plate; 31. Stop bar; 32. U-shaped moving frame; 33. Rotating cone head; 34. Transmission rod; 35. First synchronous wheel; 36. Second synchronous wheel; 37. Connecting plate; 38. Guide rod; 39. Vertical plate; 40. Connecting rod; 41. Track groove; 42. Sliding block; 43. Damping shaft; 44. Clamping plate; 45. Shielding plate; 46. Strip groove. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0050] Example 1: Reference Figures 1 - 3 and Figure 5 The invention relates to the technical field of masterbatch preparation, and the injection molding machine comprises a base 1, and a tube body 2 is fixed on the top of the base 1. A spiral feed shaft 4 is rotated in the tube body 2, and the spiral feed shaft 4 is used to transport the recycled plastic raw material to the injection tube 7. One side of the tube body 2 is fixedly connected with the injection tube 7, and one side of the injection tube 7 is fixed with a plurality of injection nozzles 8, and the injection nozzles 8 are used to extrude the molten plastic. One side of the tube body 2 is rotatably connected with a transmission rod 34 fixedly connected to the rotating shaft of the spiral feed shaft 4, so that the spiral feed shaft 4 can drive the transmission rod 34 to rotate together when rotating.

[0051] Reference Figure 4 and Figure 5 A cooling box 9 is provided on one side of the base 1, and the cooling box 9 is used to cool and mold the strip extruded from the tube body 2. A U-shaped moving frame 32 is slidably connected to the top of the cooling box 9, and a plurality of rotating cone heads 33 are rotatably penetrated on one side of the U-shaped moving frame 32. These rotating cone heads 33 are used to dredge the injection nozzle 8 to prevent the injection nozzle 8 from being blocked.

[0052] Reference Figures 3 - 8In order to realize the rotation of the rotating cone head 33 and the reciprocating movement of the U-shaped moving frame 32, a dredging structure is provided. The dredging structure includes a connecting plate 37 arranged above the U-shaped moving frame 32, and a guide rod 38 is slidably penetrated in the connecting plate 37, and the guide rod 38 is fixed to one end of the tube body 2. Two adjacent rotating cone heads 33 are connected by sprocket and chain transmission, so that when one of the rotating cone heads 33 rotates, the other rotating cone heads 33 can be driven to rotate synchronously. One end of the transmission rod 34 penetrates the U-shaped moving frame 32, and a first synchronous wheel 35 is slidably sleeved on its outer wall. The first synchronous wheel 35 rotates on the side of the U-shaped moving frame 32 away from the tube body 2, and a second synchronous wheel 36 is fixed to one end of one of the rotating cone heads 33, and the second synchronous wheel 36 is connected to the first synchronous wheel 35 by a synchronous belt transmission. Therefore, when the transmission rod 34 rotates, one of the rotating cone heads 33 can be driven to rotate through the cooperation of the first synchronous wheel 35, the second synchronous wheel 36 and the synchronous belt, and then all the rotating cone heads 33 can be driven to rotate synchronously. In order to drive the U-shaped moving frame 32 to move back and forth, the connecting plate 37 is rotatably connected to the side away from the tube body 2 with a connecting rod 40, and a sliding block 42 is fixed to the bottom end of the connecting rod 40. The two cams 22 are arranged left and right, and one end of the transmission rod 34 is fixedly connected to the cam 22 located on the left. The outer wall of the cam 22 located on the left is provided with a track groove 41, and the sliding block 42 slides with the track groove 41. When the transmission rod 34 drives the cam 22 to rotate, the cam 22 pushes the sliding block 42 to move back and forth up and down through the cooperation between the track groove 41 and the sliding block 42. Under the action of the connecting rod 40, the sliding block 42 drives the connecting plate 37 and the U-shaped moving frame 32 to move back and forth left and right, so that the rotating rotating cone head 33 can be reciprocated and inserted into the injection nozzle 8 to dredge the injection nozzle 8. The top of the guide rod 38 is fixed with a vertical plate 39, and the connecting rod 40 is provided with a through groove, and the vertical plate 39 runs through the through groove, which is used to limit the connecting rod 40.

[0053] Specifically, when in use, the motor is started to drive the spiral feed shaft 4 to rotate, and the spiral feed shaft 4 transports the recycled plastic raw material to the injection tube 7, and extrudes it into a strip through the injection nozzle 8. The strip enters the cooling box 9 for cooling and molding. At the same time, the transmission rod 34 drives the cam 22 to rotate, and the U-shaped moving frame 32 is pushed to reciprocate through the cooperation of the track groove 41 and the sliding block 42, so that the rotating cone head 33 is reciprocated and inserted into the injection nozzle 8 to dredge the injection nozzle 8.

[0054] Reference Figure 4 , Figure 8 , Figure 10 and Figure 11, on the top of the cooling box 9, a U-shaped frame 11 is also fixed. In both the U-shaped frame 11 and the cooling box 9, a feeding roller 12 is rotatably provided for conveying the cooled and formed strip-shaped objects. On the side of the U-shaped frame 11 away from the pipe body 2, a cutting knife 15 is slidably connected for granulation operation. In order to drive the cutting knife 15 to reciprocate, a reciprocating driving structure is provided in the U-shaped frame 11. This driving structure includes a gearbox 17 fixed to the top of the U-shaped frame 11. A driven rod 20 is fixed to the input shaft of the gearbox 17. One end of the driven rod 20 is fixedly connected to a cam 22 on the right side, and the driven rod 20 is coaxial with the transmission rod 34. A rotating disk 18 is fixed to the output shaft of the gearbox 17. A pin shaft 19 is fixed to a side of the rotating disk 18 deviating from the center. The top of the cutting knife 15 is fixed with a frame body 16 through a round pipe, and the pin shaft 19 is slidably engaged with the frame body 16. When the transmission rod 34 rotates, the driven rod 20 is driven to rotate through the cooperation of the cam 22 and the pin rod 23. Under the action of the gearbox 17, the driven rod 20 drives the rotating disk 18 to rotate. The rotating disk 18 drives the cutting knife 15 to reciprocate through the cooperation of the pin shaft 19 and the frame body 16 for granulation operation.

[0055] Referring to Figure 1 and Figure 10 , one end of each of the two feeding rollers 12 rotatably penetrates through the U-shaped frame 11 and the cooling box 9 respectively and is fixedly provided with a gear 13. The two gears 13 are meshed with each other to make the two feeding rollers 12 rotate towards each other for conveying. The motor drives one of the feeding rollers 12 to rotate, and the two feeding rollers 12 rotate under the action of the two meshed gears 13 to complete the conveying of the strip-shaped objects.

[0056] Specifically, the cooled and formed strip-shaped objects are conveyed to the cutting knife 15 by the feeding rollers 12. The transmission rod 34 drives the cutting knife 15 to reciprocate through the cooperation of the cam 22, the driven rod 20, the gearbox 17 and the rotating disk 18 for granulation operation. Finally, the stirring plate 26 stirs the cooling water, and the feeding plate 30 rotates to fish out and discharge the color masterbatch from the cooling water.

[0057] Referring to Figure 4 , Figure 8 and Figure 9 , in addition, a transmission structure is also provided in the cooling box 9 for driving the stirring plate 26 to reciprocate and driving the feeding plate 30 to rotate. This transmission structure includes two cams 22, and the same pin rod 23 is fixed between the two cams 22. A stirring plate 26 is slidably connected in the base 1 for stirring the cooling water in the cooling box 9. A feeding plate 30 is rotatably connected to the inner wall of the cooling box 9 on the side away from the pipe body 2 for fishing out and discharging the color masterbatch from the cooling water. When the transmission rod 34 rotates, the stirring plate 26 is driven to reciprocate through the cooperation of the cam 22 and the pin rod 23 to stir the cooling water, and at the same time, the feeding plate 30 is driven to rotate for fishing out and discharging the color masterbatch.

[0058] Referring to Figure 4 ,Figure 8 and Figure 9 The transmission structure mainly includes components such as U-shaped plate 24, toggle plate 26, pin rod 23, T-shaped support plate 10, connecting rod 27, T-shaped plate 29, and material conveying plate 30. First, the U-shaped plate 24 is designed to be slidable within the cooling box 9. Toggle plates 26 are fixed to the two bottom ends of the U-shaped plate 24, so that when the U-shaped plate 24 moves, the toggle plates 26 will move accordingly. Inside the U-shaped plate 24, a relief groove 25 is provided, which slidably cooperates with the pin rod 23, enabling the pin rod 23 to drive the U-shaped plate 24 and the toggle plates 26 to perform reciprocating up-and-down movements when rotating. A T-shaped support plate 10 is also fixed inside the cooling box 9, and the T-shaped support plate 10 is located below the material conveying roller 12. Inside the T-shaped support plate 10, two sliding grooves 28 are provided, and two connecting rods 27 are respectively slidably connected within these two sliding grooves 28. One end of each of these two connecting rods 27 is fixedly connected to the toggle plate 26, and the other end is fixed with a T-shaped plate 29. When the toggle plate 26 moves up and down, it will drive the connecting rods 27 and the T-shaped plate 29 to move together. The top end of the T-shaped plate 29 touches the bottom of the material conveying plate 30, so when the T-shaped plate 29 moves, it will push the material conveying plate 30 to rotate. A retaining strip 31 is also fixed to one side of the material conveying plate 30, and the function of this retaining strip 31 is to prevent the color masterbatch from falling off the material conveying plate 30.

[0059] Specifically, during the working process of the injection molding machine, the transmission rod 34 will drive the cam 22 and the pin rod 23 to rotate. When the pin rod 23 cooperates with the relief groove 25, it will drive the U-shaped plate 24 and the toggle plates 26 to perform reciprocating up-and-down movements. During the movement of the toggle plate 26, the circular holes thereon can stir the cooling water inside the cooling box 9, accelerating the cooling of the cooling water and ensuring that the cooling water can effectively play a role in cooling and forming. At the same time, the reciprocating movement of the toggle plate 26 can also drive the strip-shaped object to sway in the cooling water, enabling the strip-shaped object to fully contact the cooling water and accelerating the cooling and forming of the strip-shaped object. In addition, when the toggle plate 26 drives the material conveying plate 30 to rotate through the cooperation of the connecting rod 27 and the T-shaped plate 29, the material conveying plate 30 will rotate upward and scoop up the color masterbatch with the cooperation of the retaining strip 31. Then, the color masterbatch will be conveyed along the inclined surface of the material conveying plate 30 to one side of the cooling box 9, completing the discharging operation of the color masterbatch.

[0060] Referring to Figure 9 In order to further enhance the effect of the toggle plate 26 stirring the cooling water and facilitate the discharge of the color masterbatch from the cooling box 9 by the material conveying plate 30, a plurality of through holes are provided on both the material conveying plate 30 and the toggle plate 26. The through holes on the toggle plate 26 can increase the area and effect of stirring the cooling water, while the through holes on the material conveying plate 30 can drain the cooling water to prevent the cooling water from hindering the conveying of the color masterbatch.

[0061] Referring to Figure 10, in order to prevent the entanglement of the strip-shaped objects when the stirring plate 26 stirs the cooling water, which may affect the later conveying of the conveying roller 12 and the granulation of the cutting knife 15, a plurality of limiting rings 14 are fixed on the side of the T-shaped support plate 10 close to the pipe body 2. These limiting rings 14 can limit the strip-shaped objects formed by extrusion and cooling, preventing them from being entangled and disordered.

[0062] Refer to Figure 5 and Figure 7 , the connecting plate 37, through which a plurality of damping rotating shafts 43 penetrate. These damping rotating shafts 43 not only play a supporting role but also allow a certain degree of rotational damping to adapt to different clamping requirements. Clamping plates 44 are fixed at both ends of the damping rotating shafts 43. In this way, through the cooperation of the damping rotating shafts 43 and the two clamping plates 44, the connecting plate 37 and the U-shaped moving frame 32 can be firmly clamped and fixed together. When the injection molding machine is working, the connecting plate 37 can drive the U-shaped moving frame 32 to move reciprocally, thereby realizing the precise control of the injection nozzle 8. In addition, a plurality of scraping blades are fixed on the outer wall of the rotating cone head 33. The purpose of these scraping blades is to effectively remove the solidified raw materials in the injection nozzle 8 after the raw materials in the injection nozzle 8 solidify, ensuring the unobstructed flow of the injection nozzle 8.

[0063] Refer to Figures 1 - 3 , further, a feeding hopper 3 is fixedly connected to the top of the pipe body 2 of the injection molding machine for injecting a mixture of recycled plastic and color masterbatch into the injection molding machine. A plurality of heating rings 6 are fixed on the outer wall of the pipe body 2 for heating the raw materials in the pipe body to the temperature required for injection molding. At the same time, a circular ring sleeve 5 is provided on the pipe body 2, and these heating rings 6 are all arranged inside the circular ring sleeve 5, which can provide additional support and protection to ensure the stability and safety of the heating rings 6.

[0064] Example 2: Refer to Figure 12, improved on the basis of Example 1: the injection molding machine also includes a T-shaped support plate 10, and two shielding plates 45 are slidably connected to the side of the T-shaped support plate 10 away from the toggle plate 26. The main function of the two shielding plates 45 is to close the upper half of the sliding groove 28 during the injection molding process to prevent the masterbatch from entering the area on the side of the T-shaped support plate 10 away from the feed plate 30 through the sliding groove 28, thereby ensuring the smooth progress of the injection molding process. The top of the shielding plate 45 slides through the top of the T-shaped support plate 10, so that the shielding plate 45 can slide freely on the T-shaped support plate 10. At the same time, a strip groove 46 is provided on one side of the shielding plate 45, and two L-shaped rods 21 are fixed to the bottom of one side of the T-shaped support plate 10. One end of the two L-shaped rods 21 slides with the corresponding strip grooves 46 respectively. This design not only increases the sliding stability of the baffle plate 45, but also limits it when the baffle plate 45 moves down to prevent it from sliding down excessively. Preferably, a cooling coil (316L stainless steel) is installed in the cooling box 9, the cooling coil is connected to the factory chilled water, and a solenoid valve is installed on the pipeline, and a temperature sensor (such as PT100 or thermocouple) is installed in the cooling box 9 to monitor the cooling water temperature in real time and feed the data back to the controller (such as PLC or microcontroller). The target temperature range (such as 10-25°C) is set according to the process requirements, and the critical temperature threshold is defined. When the water temperature exceeds the threshold, the adjustment action is triggered, and the solenoid valve is opened or closed to allow the factory chilled water to pass through the cooling coil, and the cooling coil is used to exchange heat with the cooling water in the cooling box 9 to cool down.

[0065] A method for using an injection molding machine for preparing masterbatch from recycled plastics, comprising the following steps:

[0066] S1, feed the raw material into the tube body 2 through the injection hopper 3, the motor drives the spiral feed shaft 4 to rotate and transport the raw material to the direction of the injection tube 7, the heating ring 6 radiates and heats the raw material in the tube body 2 to melt, the molten raw material is extruded from the tube body 2 by the spiral feed shaft 4 and is put into the cooling box 9 through the injection tube 7 and the injection nozzle 8, the cooling water in the cooling box 9 cools and shapes the extruded raw material to form a strip, then the strip passes through the limit ring 14 and is placed between the two feed rollers 12, the limit ring 14 limits the strip, the motor drives one of the feed rollers 12 to rotate, the two feed rollers 12 rotate under the action of two mutually meshing gears 13, and the conveying of the strip is completed;

[0067] S2. During the conveying process, one end of the spiral feeding shaft 4 drives the transmission rod 34 to rotate. The transmission rod 34 drives the driven rod 20 to rotate through the cooperation of the cam 22 and the pin rod 23. The driven rod 20 drives the rotating disc 18 to rotate under the action of the gearbox 17. The gearbox 17 can adjust the rotation speed of the rotating disc 18 according to the rotation speed of the driven rod 20. The rotating disc 18 drives the cutting knife 15 to reciprocate up and down through the cooperation of the pin shaft 19 and the frame 16 to complete the granulation operation. The granulated masterbatch falls on the side of the T-shaped support plate 10 away from the pipe body 2, and the masterbatch is cooled again to avoid the bonding phenomenon caused by insufficient cooling of the masterbatch;

[0068] S3. When the transmission rod 34 drives the cam 22 and the pin rod 23 to rotate, the cooperation of the pin rod 23 and the relief groove 25 drives the toggle plate 26 to reciprocate up and down. The toggle plate 26 and the circular hole provided thereon can stir the cooling water in the cooling tank 9 to accelerate the cooling of the cooling water and ensure that the cooling water can effectively play a role in cooling and forming. When the toggle plate 26 reciprocates, it can also drive the strip to shake in the cooling water, so that the strip fully contacts the cooling water and accelerates the cooling and forming of the strip; In addition, the toggle plate 26 drives the feeding plate 30 to rotate through the cooperation of the connecting rod 27 and the T-shaped plate 29. When the feeding plate 30 rotates upward, it can lift the masterbatch with the cooperation of the retaining bar 31 and convey it along the inclined surface of the feeding plate 30 to one side of the cooling tank 9 to complete the discharging operation of the masterbatch;

[0069] S4. When the connecting rod 27 moves upward, it pushes the shielding plate 45 to move upward. When the connecting rod 27 moves downward, the shielding plate 45 moves downward and resets under the action of gravity to block the sliding groove 28 to prevent the masterbatch from entering the area on the side of the T-shaped support plate 10 away from the feeding plate 30 through the sliding groove 28;

[0070] S5. When it is necessary to dredge the injection nozzle 8 after the masterbatch preparation is completed, clean water is injected into the pipe body 2 to clean its interior. Then, the clamping plate 44 is rotated, and the clamping plates 44 at both ends of the damping rotating shaft 43 just rotate to the lower side. The damping rotating shaft 43 completes the clamping and fixing of the connecting plate 37 and the U-shaped moving frame 32 with the two clamping plates 44. Then, the spiral feeding shaft 4 is driven to rotate. Under the action of the clean water, the spiral feeding shaft 4 cleans the interior of the pipe body 2, and the spiral feeding shaft 4 drives the transmission rod 34 to rotate. The transmission rod 34 drives one of the rotating cones 33 to rotate through the cooperation of the first synchronous wheel 35, the second synchronous wheel 36 and the synchronous belt. Adjacent two of the plurality of rotating cones 33 are connected by a sprocket and a chain drive. Therefore, the plurality of rotating cones 33 rotate synchronously. When the transmission rod 34 drives the cam 22 to rotate, the cam 22 pushes the sliding block 42 to move up and down reciprocally through the cooperation of the track groove 41 and the sliding block 42. The sliding block 42 drives the connecting plate 37 and the U-shaped moving frame 32 to move left and right reciprocally under the action of the connecting rod 40. Furthermore, the rotating rotating cone 33 can be reciprocally inserted into the injection nozzle 8 to dredge the injection nozzle 8, and the scraping blades arranged on the outer wall of the rotating cone 33 can effectively remove the solidified raw materials. When the U-shaped moving frame 32 is reset under the action of the connecting rod 40, the clean water in the pipe body 2 can flush out the solidified raw materials in the injection nozzle 8 to complete the dredging operation. The operation is simple and the dredging efficiency is extremely high.

[0071] The attached drawings in the description of this application are only schematic in nature. The dimensions and shapes of the components shown therein are not actually limited, but only a schematic representation. In the actual implementation process, the components can be reasonably configured and adjusted according to specific requirements and actual situations.

[0072] The above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes an equivalent substitution or change, and should be covered by the protection scope of the present invention.

Claims

1. An injection molding machine for preparing masterbatch from recycled plastics, comprising a base (1) with a pipe body (2) fixed to the top. A spiral feeding shaft (4) is rotatably connected inside the pipe body (2). One side of the pipe body (2) is fixedly communicated with an injection molding pipe (7). A plurality of injection nozzles (8) are arranged on one side of the injection molding pipe (7). One side of the pipe body (2) is rotatably connected with a transmission rod (34) coaxially fixed to the spiral feeding shaft (4), characterized in that, Also includes: A cooling box (9) is arranged on one side of the base (1) and is used to cool the strip extruded by the injection nozzle (8). The top of the cooling box (9) is slidably connected to a U-shaped moving frame (32). One side of the U-shaped moving frame (32) is rotatably connected with a plurality of rotating cone heads (33). The U-shaped moving frame (32) is provided with a dredging structure for driving the rotating cone heads (33) to rotate synchronously and reciprocately insert into the injection nozzle (8). A U-shaped frame (11) is fixedly arranged on the top of the cooling box (9), a feeding roller (12) is rotatably arranged in the U-shaped frame (11) and the cooling box (9), a cutting knife (15) is slidably connected to the side of the U-shaped frame (11) away from the tube body (2), and a driving structure for driving the cutting knife (15) to move back and forth is arranged in the U-shaped frame (11); The transmission structure comprises two cams (22) fixedly connected by a pin rod (23), the transmission rod (34) being fixedly connected to one cam (22), a sliding plate (26) being slidably connected to the cooling box (9) and a rotatably connected feed plate (30), the sliding plate (26) being linked to the cam (22) through the pin rod (23) to stir cooling water, and the feed plate (30) being linked to the sliding plate (26) through a connecting rod mechanism to scoop out masterbatch.

2. The injection molding machine according to claim 1, characterized in that, The dredging structure comprises: A connecting plate (37) is slidably sleeved on a guide rod (38) fixedly connected to the tube body (2); adjacent rotating cone heads (33) are driven by a sprocket chain; a transmission rod (34) penetrates the U-shaped moving frame (32) and sleeves a first synchronous wheel (35); an end of a rotating cone head (33) is fixedly connected to a second synchronous wheel (36); the first synchronous wheel (35) and the second synchronous wheel (36) are driven by a synchronous belt; A connecting rod (40) has one end hinged to the connecting plate (37) and the other end fixed to a sliding block (42). A track groove (41) is provided on the outer wall of the left cam (22). The sliding block (42) and the track groove (41) are slidably matched to drive the U-shaped moving frame (32) to move horizontally back and forth. The limiting vertical plate (39) is fixedly connected to the top end of the guide rod (38) and penetrates the through slot of the connecting rod (40) to limit the swing range of the connecting rod (40).

3. The injection molding machine according to claim 2, characterized in that, The outer peripheral surface of the rotating cone head (33) is provided with a spiral scraper, and the rotation direction of the spiral scraper is consistent with the rotation direction of the rotating cone head (33).

4. The injection molding machine according to claim 1, wherein, The driving structure comprises: A gearbox (17) is fixedly mounted on the top of the U-shaped frame (11), and its input shaft is fixedly connected to a driven rod (20), and the driven rod (20) is fixedly connected to a right cam (22); A rotating disk (18) is fixedly connected to the output shaft of the gearbox (17), and its eccentric position is fixedly connected to a pin shaft (19); The frame (16) is fixedly connected to the top of the cutter (15) and is slidably matched with the pin shaft (19) to convert the rotation of the rotating disk (18) into the reciprocating linear motion of the cutter (15).

5. The injection molding machine according to claim 1, characterized in that, The transmission structure also includes: A U-shaped plate (24) is slidably disposed in the cooling box (9) and fixedly connected to the toggle plate (26), and a clearance groove (25) is provided on the inner side of the U-shaped plate for slidingly cooperating with the pin rod (23); A T-shaped support plate (10) is fixedly arranged in the cooling box (9), and sliding grooves (28) are arranged on both sides thereof. Two connecting rods (27) are respectively slidably arranged in the sliding grooves (28) and one end of the connecting rods is fixedly connected to the T-shaped plate (29). The top end of the T-shaped plate (29) abuts against the bottom of the conveying plate (30) to drive the conveying plate (30) to rotate.

6. The injection molding machine according to claim 5, wherein, The material conveying plate (30) and the shifting plate (26) are both provided with a plurality of through holes, and one side of the material conveying plate (30) is fixedly connected to a blocking bar (31).

7. The injection molding machine according to claim 5, characterized in that, A plurality of limiting rings (14) are fixedly connected to one side of the T-shaped support plate (10) close to the tube body (2), and the central axis of the limiting ring (14) is parallel to the conveying direction of the feed roller (12).

8. The injection molding machine according to claim 2, wherein, The connecting plate (37) is detachably connected to the U-shaped moving frame (32) via a damping rotating shaft (43), and both ends of the damping rotating shaft (43) are fixedly connected to a clamping plate (44).

9. The injection molding machine according to claim 5, characterized in that, The side of the T-shaped support plate (10) away from the toggle plate (26) is slidably connected to two shielding plates (45), and the top of the shielding plate (45) passes through the T-shaped support plate (10) and is slidably matched with the L-shaped guide rod (21) through the strip groove (46).

10. A method of using an injection molding machine for preparing masterbatch from recycled plastics, which is applied to the injection molding machine for preparing masterbatch from recycled plastics described in claim 9, characterized in that, The following steps are involved: S1, raw materials are fed into the tube body (2) through the injection hopper (3), and the motor drives the spiral feed shaft (4) to rotate and feed the raw materials to the position of the melting ring sleeve (5). After melting, the raw materials are extruded and enter the cooling box (9) through the injection tube (7) and the injection nozzle (8) to be cooled and formed into strips; after the strips are limited by the limit ring (14), they are transported by two feed rollers (12) driven by the motor; S2, the spiral feed shaft (4) drives the transmission rod (34) to rotate, and the cam (22) and the pin rod (23) and the pin shaft (19) and the frame (16) cooperate to drive the cutter (15) to move up and down to complete the pelletizing; after pelletizing, the masterbatch falls into the cooling box (9) and is cooled again; S3, when the transmission rod (34) rotates, the toggle plate (26) moves up and down to stir the cooling water and drive the strip to shake, thereby accelerating cooling; at the same time, the toggle plate (26) drives the conveying plate (30) to rotate through the connecting rod (27) and the T-plate (29), picks up the masterbatch and transports it to one side of the cooling box (9); S4, when the connecting rod (27) moves, it pushes the shielding plate (45) to move up and down to reset, shielding the sliding groove (28) to prevent the masterbatch from passing through the sliding groove (28) and entering the area on one side of the T-shaped support plate (10) away from the feed plate (30); S5. After the preparation is completed, inject clean water to clean the inside of the pipe body (2); rotate the clamping plate (44) to the lower side, and fix the connecting plate (37) and the U-shaped moving frame (32) through the cooperation of the damping rotating shaft (43) and the clamping plate (44); drive the spiral feeding shaft (4) to rotate to clean the pipe body (2), and drive the synchronous rotation of multiple rotating cone heads (33) through the cooperation of the first synchronous pulley (35), the second synchronous pulley (36), the synchronous belt, the sprocket and the chain; the cam (22) pushes the U-shaped moving frame (32) to move left and right reciprocally through the cooperation of the track groove (41), the sliding block (42) and the connecting rod (40), so that the rotating cone heads (33) are reciprocally inserted into the injection nozzle (8) for dredging, the scraping blade removes the solidified raw materials, and the dredging operation is completed after the clear water flushing.

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