A pom modified plastic particle production device and method of use

Abstract

The application discloses a POM modified plastic particle production device and a use method thereof, and belongs to the technical field of plastic particle production devices.The device comprises a cooling water tank used for containing cooling liquid to cool and shape the extruded strip; a circulating water path driving assembly fixed on the cooling water tank and used for driving the cooling liquid to flow along the length direction of the tank body; a dragging mechanism which is liftable and immersed in the cooling liquid of the cooling water tank and linearly moves along the cooling water tank under the liquid flow thrust generated by the circulating water path driving assembly; and a plurality of groups of clamps fixed on the dragging mechanism, wherein the clamps clamp the material strip, the material strip is made of the same material as the processed material, and the axial direction of the material strip is perpendicular to the movement direction of the dragging mechanism.The application solves the problems in the prior art, such as the dependence on manual high-temperature traction, the risk of scalding when the material head is crimped, the risk of winding when the subsequent input cutting machine is used, the broken strip caused by secondary carding, the waste of expensive raw materials, and the serious restriction on the production efficiency and safety.

Description

Technical Field

[0001] This invention relates to the field of plastic extrusion granulation equipment technology, and in particular to a POM modified plastic granule production device and its usage method. Background Technology

[0002] Polyoxymethylene (POM), a high-performance engineering plastic, is widely used in the automotive, electronics, and precision machinery industries due to its excellent wear resistance, fatigue resistance, and dimensional stability. With increasingly stringent environmental regulations, the recycling and reuse of POM-modified plastic waste (physical modification and granulation) has become an important means of cost reduction and efficiency improvement in the industry.

[0003] In existing POM modified plastic granulation processes, a water-cooling, traction, and pelletizing process is typically used. The specific process involves the extruder extruding molten POM material into multiple parallel strips, which are then directly fed into a cooling water tank for shaping, and subsequently cut by a downstream traction machine and pelletizer. Although this technology is quite mature, the following technical shortcomings still urgently need to be addressed when processing recycled POM or high-glass fiber content modified materials: 1. POM plastic melt is very prone to shaking, sticking together (two strips sticking together) or deviation after extrusion due to water flow fluctuations or its own gravity; Second, in the initial stage of extrusion, operators need to manually pull the high-temperature extruded strip into the cooling water tank. Because the POM strip has extremely low strength in the high-temperature molten state, and it is difficult to maintain a constant speed for manual pulling, it is very easy for it to "break," thereby reducing production efficiency and causing a large amount of waste. Third, in traditional traction processes, to establish traction, operators need to be in close proximity to the high-temperature area to squeeze multiple extrusion strips together to form a feed head, which poses a risk of burns. Furthermore, when feeding the feed into the pelletizer after traction is complete, a section of the unpositionable feed head needs to be cut off, resulting in waste of raw materials. Additionally, when multiple extrusion strips are squeezed together and the operator hands the feed the feed close to the pelletizer's conveyor rollers, there is a risk of fingers getting caught in the feed. Fourth, because the heads of multiple extruded strips that are tangled together are directly inserted into the pelletizer, the multiple extruded strips are close to each other and need to be combed and separated a second time. This not only increases the labor intensity, but also makes it very easy for the strips to break during the combing process.

[0004] To this end, we designed a POM-modified plastic granule production device and its usage method. Summary of the Invention

[0005] The purpose of this invention is to solve the problems in the existing technology where relying on manual high-temperature traction easily leads to speed loss and breakage, coupled with the risk of burns when squeezing the material head, the risk of entanglement when feeding it into the cutting machine, and the breakage and waste of expensive raw materials caused by secondary combing, which seriously restrict the production efficiency and safety. Therefore, this invention proposes a POM modified plastic granule production device and its usage method.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A POM modified plastic granule production apparatus includes: a cooling water tank (10) for containing coolant to cool and shape the extrusion strip (70) therein; a circulating water drive assembly (30) fixed on the cooling water tank (10) and used to drive the coolant to flow directionally along the length of the tank; a dragging mechanism (20) vertically immersed in the coolant in the cooling water tank (10) and linearly moving along the cooling water tank (10) under the thrust of the liquid flow generated by the circulating water drive assembly (30); and multiple sets of clamps (40) fixed on the dragging mechanism (20). The clamp (40) holds a material strip (60), the material of which is the same as the material being processed, and its axial direction is perpendicular to the movement direction of the dragging mechanism (20); multiple material strips (60) are arranged in parallel to form a bearing structure; the hot-melt extruded strip (70) that has just been extruded is adhered to the bearing structure and forms a grid plate to achieve the side-by-side positioning of multiple extruded strips (70); the flow equalization component (50) is fixedly installed in the cooling water tank (10) and located at the outlet of the circulating water drive component (30) to keep the coolant flowing smoothly.

[0007] Preferably, guide rails are symmetrically fixed on the inner wall of the cooling water tank, and the guide rails extend along the length of the cooling water tank and are immersed in the coolant; The towing mechanism includes a mounting frame, the bottom of which is fixed with multiple hollow floats to provide buoyancy so that the mounting frame is suspended in the coolant; The mounting frame is provided with multiple lower rollers and side rollers on both sides. The lower rollers are supported on the bottom surface of the guide rail, and the side rollers abut against the side of the guide rail to limit the displacement trajectory of the mounting frame under the thrust of the liquid flow, so that the dragging mechanism moves linearly along the guide rail under the drive of the circulating water drive assembly. Both ends of the guide rail along the length of the cooling water tank have clearances between them and the corresponding inner walls of the cooling water tank. A shovel plate is fixed to the side of the mounting bracket away from the circulating water drive assembly.

[0008] Preferably, the clamp includes a first clamp plate fixed to the mounting frame, and a second clamp plate hinged to one side of the first clamp plate; Magnets are fixed on the opposite inner surfaces of the clamping plate one and the clamping plate two, and the magnets on the clamping plate one and the clamping plate two are set to have opposite magnetic poles facing each other. When the second clamping plate rotates and closes around the hinge axis, the magnetic attraction force of the magnet presses the material strip tightly between the first and second clamping plates, thereby achieving rapid closing and self-locking of the clamp.

[0009] Preferably, the circulating water drive assembly includes a water pump, which is connected to an outlet pipe and an inlet pipe; The cooling water tank is fixed with a partition plate placed below the float, which divides the inner cavity of the tank into an upper cooling zone and a lower return water zone. The partition plate has multiple drain holes on the side away from the outlet pipe. The outlet pipe is connected to the cooling zone, and the inlet pipe is connected to the return water zone, thereby forming a closed-loop circulation of coolant in the cooling water tank.

[0010] Preferably, the flow equalization assembly includes an upward-turning water plate and an overflow plate vertically fixed to the partition plate, and a downward-turning water plate fixed to the inner wall of the cooling water tank; A flow gap is provided between the downward-folding water plate and the partition plate to allow coolant to pass through; The top of the upward-turning water plate is higher than the top of the overflow plate and lower than the top of the downward-turning water plate; The upper edge of the overflow plate is higher than the axis of the pressure roller in the cooling water tank, so as to form a stable immersion cooling liquid level by utilizing the height difference between the overflow plate and the pressure roller, and to transform the circulating water flow into a smooth laminar flow through a multi-stage baffle structure.

[0011] Preferably, V-shaped grooves are provided on the opposing clamping surfaces of clamping plate one and clamping plate two. When clamping plate one and clamping plate two are closed, the two sets of V-shaped grooves form a clamping space for accommodating the material strip; and the radial movement and circumferential rotation of the material strip are restricted by the inclined surface.

[0012] Preferably, the second clamping plate includes a movable plate and a pressure plate for direct contact with the material strip; A spring sheet is connected between the movable plate and the pressure plate. When the clamping plate is closed, the spring sheet undergoes elastic deformation to adaptively press the pressure plate against the surface of the material strip.

[0013] Preferably, the clamping opening of the pressure plate is positioned away from the water outlet direction of the water pump in the circulating water drive assembly; When the dragging mechanism moves under the thrust of the liquid flow, the back of the movable plate is subjected to the water flow pressure, which makes the pressure plate tend to stick tightly to the material strip, offsetting the impact force of the water flow on the front of the pressure plate and preventing the pressure plate from flipping or loosening under the impact of the water flow.

[0014] Preferably, the partition plate has an installation port through which a filter screen plate placed in the return water area is installed.

[0015] A method of using a POM-modified plastic granule production apparatus includes the following steps: S1. Mesh plate construction: Multiple strips of the same material as the material being processed are fixed on the mounting frame of the dragging mechanism by clamps to complete the clamping, so that multiple strips are arranged in parallel to form a grid-like load-bearing structure. S2, Extrusion and Adhesion: Start the extruder and guide the freshly extruded hot melt extruded strips to the inlet of the cooling water tank, so that multiple extruded strips are respectively adhered to the material strips of the load-bearing structure to form a grid plate-like assembly; S3, Immersion Positioning: The buoyancy provided by the float at the bottom of the mounting frame allows the towing mechanism to be suspended in the liquid, and the movement trajectory of the towing mechanism is limited by the cooperation of the guide rail and the roller. S4. Hydraulic Drive and Cooling: Start the circulating water drive component, and the water pump will pump the coolant from the lower return water zone into the upper cooling zone through the outlet pipe; the coolant will form a stable laminar flow after passing through the flow equalization component and undergoing multiple deflections; the towing mechanism will be suspended under the buoyancy provided by the float and driven by the thrust of the laminar liquid to move the grid plate assembly on it linearly along the guide rail toward the pelletizer. S5. Separation and Pelletizing: After cooling and shaping, the mesh plate assembly and extrusion strip are moved to the end of the cooling water tank. Then, by holding the rear of the mesh plate assembly, the front end of the material strip and extrusion strip are directly fed into the pelletizer for pelletizing.

[0016] The beneficial effects of this invention are as follows: 1. This invention is driven by liquid flow thrust. The towing mechanism is suspended in the water under the support of the float. It uses the directional laminar flow generated by the circulating water drive component as the driving force. Combined with the stable laminar flow environment formed by the flow equalization component, it effectively avoids the impact of water flow fluctuations on the material strip. It fundamentally solves the problem of breakage of the molten section caused by uncontrolled manual traction speed and significantly reduces the breakage rate. 2. In this invention, operators do not need to perform dangerous "squeezing the material head" and "manual strip pulling" actions near the high-temperature extrusion die. They only need to complete the assembly and loading of the grid plate in a safe area outside the tank, and then immerse the whole thing in the water tank. This avoids the risk of being burned when squeezing, avoids material waste, replaces the tedious process of manual secondary combing, eliminates the step of cutting the material head, and avoids the problem of extrusion strip breakage during secondary combing. 3. This invention uses multiple strips of material and extrusion strips bonded together to form a grid-like assembly, so that the multiple strips of material are positioned side by side and fed into the two conveying rollers of the pelletizer. At this time, the operator holds the strip of material away from the head of the extrusion strip, keeping his palm away, and conveys the side by side extrusion strips to the two conveying rollers, avoiding fingers from getting caught and improving the safety of operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a POM-modified plastic granule production device proposed in this invention. Figure 2 This invention proposes a POM-modified plastic granule production apparatus. Figure 1 Enlarged structural diagram at point A in the middle; Figure 3 This is a schematic diagram of the cooling water tank structure of a POM modified plastic granule production device proposed in this invention. Figure 4 This is a schematic diagram of the filter screen structure of a POM modified plastic granule production device proposed in this invention. Figure 5 This is a schematic diagram of the clamping device structure of a POM modified plastic granule production apparatus proposed in this invention. Figure 6 This invention proposes a POM-modified plastic granule production apparatus. Figure 5 Enlarged structural diagram at point B; Figure 7 This is a schematic diagram of the structure of the extrusion bar adhering to the clamped material bar in a POM modified plastic granule production device proposed in this invention; Figure 8 This is a schematic diagram of the flow state of the coolant in the cooling water tank of a POM modified plastic granule production device proposed in this invention. Figure 9 This invention proposes a POM-modified plastic granule production apparatus. Figure 8 Enlarged structural diagram at point C; Figure 10 This invention proposes a POM-modified plastic granule production apparatus. Figure 8 Enlarged structural diagram at point D.

[0018] In the diagram: 10. Cooling water tank; 11. Guide rail; 12. Divider plate; 121. Drain hole; 13. Filter screen plate; 14. Pressure roller; 20. Dragging mechanism; 21. Mounting frame; 22. Lower roller; 23. Side roller; 24. Float; 30. Circulating water drive assembly; 31. Water pump; 32. Outlet pipe; 33. Regulating valve; 34. Inlet pipe; 40. Clamp; 41. Clamping plate one; 411. Slot; 42. Clamping plate two; 421. Movable plate; 422. Spring; 423. Pressure plate; 43. Shovel plate; 44. Magnet; 50. Flow equalization assembly; 51. Upper water plate; 52. Lower water plate; 53. Overflow plate; 60. Material strip; 70. Extrusion strip. Detailed Implementation

[0019] Reference Figure 1 - Figure 10 A POM modified plastic granule production apparatus includes: a cooling water tank 10 for containing coolant to cool and shape the extruded strip 70, the coolant including clean water; The circulating water drive assembly 30 is fixed on the outer wall of the cooling water tank 10 near the extruder, and drives the coolant in the cooling water tank 10 to flow in a directional manner along the length of the tank (that is, the direction of the cutting machine). Before traction, the operator removes the towing mechanism 20 from the cooling water tank 10 upwards. After the extrusion strip 70 is arranged on the towing mechanism 20 and the extrusion strip 70 is positioned, the operator presses the towing mechanism 20 into the coolant in the cooling water tank 10, so that the towing mechanism 20 can be immersed in the coolant in the cooling water tank 10 in a height-adjustable manner. After the towing mechanism 20 is immersed in the coolant, it moves linearly along the cooling water tank 10 under the action of the liquid flow thrust generated by the circulating water drive component 30. Multiple clamps 40 are fixed on the dragging mechanism 20. The clamps 40 hold a material strip 60. The material of the material strip 60 is the same as that of the material being processed. The outer diameter of the material strip 60 is matched with the outer diameter of the extrusion strip 70. The axial direction of the material strip 60 is perpendicular to the movement direction of the dragging mechanism 20. Multiple strips 60 are arranged in parallel to form a load-bearing structure; freshly extruded hot-melt extruded strips 70 are adhered to this load-bearing structure and form a grid-like structure (see reference). Figure 7As shown), this method enables the parallel positioning of multiple extrusion strips 70. The operator does not need to squeeze the multiple extrusion strips 70 into a head with their palm, thus avoiding burns. It also avoids the problem of the extrusion strips 70 sticking together due to their proximity. Furthermore, this parallel positioning method allows the extrusion strips 70 to enter the cooling water tank 10 in a parallel manner and be fed into the two conveyor rollers of the pelletizer. At this time, the operator holds the strip 60 away from the head of the extrusion strip 70. Since the head of the extrusion strip 70 is positioned and the mesh plate is more stable, the operator can keep their palm away and convey the parallel extrusion strips 70 to the two conveyor rollers, avoiding fingers from getting caught. Since the multiple extrusion strips 70 always remain side by side, there is no need to trim the extrusion strips 70 a second time, avoiding the increase in labor intensity caused by secondary combing, as well as the problem of the extrusion strips 70 breaking during the combing process; A flow equalization component 50 is fixed inside the outlet end of the cooling water tank 10 near the circulating water drive component 30. Through the multi-stage deflection of the flow equalization component 50, the high-speed water flow is converted into a stable laminar flow to maintain the smooth flow of coolant. This ensures that the dragging mechanism 20 moves linearly in a stable laminar flow environment, avoiding large speed fluctuations when the dragging mechanism 20 drags the extrusion strip 70 linearly, which could cause the extrusion strip 70 to be unable to be dragged or to be broken.

[0020] Guide rails 11 are symmetrically fixed on the inner wall of the cooling water tank 10, and the guide rails 11 are placed below the multiple pressure rollers 14 inside the cooling water tank 10. The guide rails 11 extend along the length of the cooling water tank 10 and are immersed in the coolant. The towing mechanism 20 includes a mounting frame 21, with multiple hollow floats 24 fixed to the bottom of the mounting frame 21. The end of the float 24 facing the direction of movement (i.e., the direction of the pelletizer) has an arrow structure, which can significantly reduce the water resistance of the towing mechanism 20 during its forward movement, break the fluid, and prevent the material strip 60 from vibrating or breaking due to turbulence. The buoyancy provided by the floats 24 allows the mounting frame 21 to be suspended in the coolant. Reference Figure 2 , Figure 5 , Figure 7 As shown, multiple lower rollers 22 and side rollers 23 are respectively provided on both sides of the mounting frame 21, and the lower rollers 22 and side rollers 23 are distributed in an L-shape. Under the buoyancy of the float 24, the wheels of the lower rollers 22 abut against the lower surface of the guide rail 11, while the wheels of the side rollers 23 abut against the side of the guide rail 11. This ensures that the towing mechanism 20 can only move precisely and linearly along the guide rail 11 under the liquid thrust generated by the circulating water drive component 30, completely solving the problem of uneven speed and deviation during manual traction, and limiting the displacement trajectory of the mounting frame 21 under the liquid thrust. Both ends of the guide rail 11 along the length of the cooling water tank 10 have clearances between them and the corresponding inner walls of the cooling water tank 10. The minimum clearance is greater than the maximum external dimension of the towing mechanism 20 in the corresponding direction, so as to avoid interference between the outer contour of the towing mechanism 20 and the inner wall of the cooling water tank 10 during the process of the towing mechanism 20 floating or sinking under buoyancy. It is worth noting that when the towing mechanism 20 is pulling the extrusion strip 70 out of the clearance gap, the operator's hand enters the water in advance to intervene, so that the towing mechanism 20 slowly pulls the extrusion strip 70 through the clearance gap to exit the water, avoiding the problem of the extrusion strip 70 breaking due to rapid floating after directly falling off the guide rail 11.

[0021] Reference Figure 9 As shown, a shovel plate 43 is fixed on the side of the mounting frame 21 away from the circulating water drive assembly 30. When the molten material is discharged, the shovel plate 43 is placed below the discharge end of the die head, and then the mounting frame 21 is held to push the shovel plate 43 against the die head upward to simultaneously scrape off the head of the extrusion strip 70.

[0022] Reference Figure 5 , Figure 6 , Figure 9 As shown, the clamp 40 includes a clamping plate 41 fixed on the mounting frame 21 and a clamping plate 42 hinged to one side of the clamping plate 41 by a plurality of hinges. A clamping plate 41 is fixed at the corner of each side edge of the mounting frame 21, and the two clamping plates 42 on the same side are fixedly connected by a connecting plate. The two clamping plates 42 on the same side clamp the head of the material strip 60 respectively, and the middle part of the material strip 60 is exposed to ensure that there is enough length for bonding the extruded strips 70 side by side. Magnets 44 are fixed on the opposite inner surfaces of clamp 41 and clamp 42, and the magnets 44 on clamp 41 and clamp 42 are set to have opposite magnetic poles facing each other. The operator only needs to place the material strip 60 on the clamping plate 41, and then move the clamping plate 42 to rotate and close it around the hinge axis. When the clamping plate 42 approaches the closed position, the magnets 44 with opposite poles generate a strong magnetic attraction force, instantly pressing the material strip 60 tightly between the clamping plate 41 and the clamping plate 42, realizing the rapid closing and self-locking of the clamp 40.

[0023] Reference Figure 5 , Figure 8 As shown, the circulating water drive assembly 30 includes a water pump 31 fixed to the outer wall of the cooling water tank 10. The water pump 31 has an outlet pipe 32 connected to its outlet end and an inlet pipe 34 connected to its inlet end. A regulating valve 33 is installed at the outlet pipe 32 to precisely control the flow rate and velocity of the coolant entering the tank, thereby adjusting the moving speed of the dragging mechanism 20 to adapt to the process requirements of different extrusion speeds. A partition plate 12 is fixed inside the cooling water tank 10 and placed below the float 24. The partition plate 12 divides the inner cavity of the tank into an upper cooling zone and a lower return water zone. The partition plate 12 has multiple drain holes 121 on the side away from the outlet pipe 32. The drain holes 121 are configured to allow the coolant in the upper cooling zone to flow back to the lower return water zone. The outlet pipe 32 is connected to the cooling zone and is used to supply coolant to the extruder 70. The inlet pipe 34 is connected to the return water zone, thereby forming a closed-loop circulation of coolant in the cooling water tank 10.

[0024] Reference Figure 3 and Figure 8 As shown, in order to ensure that the coolant forms a stable laminar flow in the cooling zone and avoid impacting the fragile material strip 60, the flow equalization component 50 includes an upward water plate 51 and an overflow plate 53 that are vertically fixed on the partition plate 12, and a downward water plate 52 that is fixed to the inner wall of the cooling water tank 10. A flow gap is reserved between the downward-folding water plate 52 and the partition plate 12 for coolant to pass through; the top of the upward-folding water plate 51 is higher than the top of the overflow plate 53 and lower than the top of the downward-folding water plate 52.

[0025] The upper edge of the overflow plate 53 is higher than the axis of the pressure roller 14 installed in the cooling water tank 10. The coolant from the outlet pipe 32 surges through the gap between the lower water plate 52 and the partition plate 12 (after being blocked and buffered by the upper water plate 51), and then overflows through the overflow plate 53. This "S"-shaped flow path effectively dissipates the kinetic energy of the water flow, so as to form a stable submerged cooling liquid level by utilizing the height difference between the overflow plate 53 and the pressure roller 14, and transforms the turbulent circulating water flow into a smooth laminar flow through the multi-stage flow deflection structure.

[0026] Reference Figure 2 , Figure 6 , Figure 9 As shown, V-shaped slots 411 are provided on the opposing clamping surfaces of clamping plate 41 and clamping plate 42. When clamping plate 41 and clamping plate 42 are closed, the two sets of V-shaped grooves 411 form a clamping space for accommodating the strip 60. Utilizing the geometric principle of the V-shaped grooves 411, regardless of the minute tolerances in the diameter of the strip 60, its center always falls on the angle bisector of the V-shaped groove. This allows multiple strips 60 to automatically align after installation, ensuring that the axial height of all strips 60 is consistent and parallel to each other. Furthermore, the inclined surfaces restrict the radial movement and circumferential rotation of the strips 60, maintaining the stability of the clamped strips 60.

[0027] Reference Figure 6 , Figure 9 As shown, clamping plate 2 42 includes a movable plate 421 and a pressure plate 423 for direct contact with the material strip 60. The movable plate 421 is connected to clamping plate 1 41 by a plurality of hinges. A spring sheet 422 is connected between the movable plate 421 and the pressure plate 423. When the clamping plate 42 is closed, the spring sheet 422 undergoes elastic deformation and establishes a constant, flexible preload to adaptively press the pressure plate 423 onto the surface of the material strip 60. The flexible buffering effect provided by the spring sheet 422 allows the pressure plate 423 to adapt to the diameter change of the material strip 60 and always apply a clamping force, effectively protecting the low-strength material strip 60 from being pinched.

[0028] Reference Figure 9 As shown, the clamping port of the pressure plate 423 is set away from the water outlet direction of the water pump 31 in the circulating water drive assembly 30. When the dragging mechanism 20 moves under the thrust of the liquid flow, the back of the movable plate 421 is subjected to the water flow pressure. The coolant will generate a continuous frontal impact force on the movable plate 421, which makes the pressure plate 423 tend to stick tightly to the material strip 60, offsetting the impact force of the water flow on the front of the pressure plate 423, preventing the pressure plate 423 from flipping or loosening under the impact of the water flow. The clamping device 40 clamps the material strip 60 by using the kinetic energy of the fluid itself. Even in the case of rapid water flow or sudden flow fluctuations, the pressure plate 423 will not flip.

[0029] Reference Figure 3 , Figure 4 , Figure 10 As shown, given that POM modified plastics (especially recycled materials) often contain incompletely plasticized crystal points, carbides, or externally mixed impurities during the production process, in order to prevent these hard particles from re-entering the cooling zone and adhering to the surface of the extruder 70, the partition plate 12 is provided with an installation port. A filter screen plate 13 is installed through the installation port and placed in the return water zone. The filter screen plate 13 is vertically inserted into the partition plate 12 and is completely placed in the flow channel of the return water zone. The filter screen plate 13 can effectively intercept impurities or detached material debris generated during the cooling process. Through continuous filtration, the cleanliness of the coolant is maintained, and impurities are also prevented from accumulating at the flow equalization component 50, ensuring the stability of the laminar flow environment.

[0030] A method of using a POM-modified plastic granule production apparatus includes the following steps: S1. Mesh plate construction: Multiple sets of material strips 60 with the same material as the material being processed are fixed on the mounting frame 21 of the dragging mechanism 20 by clamping device 40 to complete clamping, so that multiple material strips 60 are arranged in parallel to form a grid-like load-bearing structure. S2. Extrusion and Adhesion: Start the extruder and guide the freshly extruded hot melt extruded strip 70 to the inlet of the cooling water tank 10. First, the device can be placed on the side of the extruded strip 70 near the die head, and then the bottom strip 60 is brought into contact with the position near the extruded strip 70, and gradually tilted towards the cooling water tank 10, adhering the extruded strip 70 to the strip 60 from bottom to top, so that the extruded strip 70 is in a vertical state; Second, wait for the naturally drooping extruded strip 70 to elongate and completely cover multiple strips 60, and move the hand-held mounting bracket 21 laterally towards the extruded strip 70, or multiple strips 60 can be adhering to the extruded strip 70 at one time to form a grid-like assembly. S3, Immersion Positioning: The operator then presses the entire assembly into the cooling water tank 10, using the float 24 at the bottom of the mounting bracket 21 to provide buoyancy, so that the towing mechanism 20 is suspended in the liquid, and the movement trajectory of the towing mechanism 20 is limited by the cooperation of the guide rail 11 and the roller. S4. Hydraulic Drive and Cooling: Start the circulating water drive assembly 30. The water pump 31 pumps the coolant from the lower return water zone into the upper cooling zone through the outlet pipe 32. The coolant undergoes multiple deflections through the upper water plate 51, lower water plate 52, and overflow plate 53 of the flow equalization assembly 50 to form a stable laminar flow. The dragging mechanism 20 is suspended under the buoyancy provided by the float 24 and, under the thrust of the laminar liquid, drives the grid plate assembly on it to move stably and linearly along the guide rail 11 toward the pelletizer. S5. Separation and Pelletizing: After cooling and shaping, the mesh plate assembly and extruder 70 are moved to the end of the cooling water tank 10. When the entire assembly reaches the clearance position at the end, the operator intervenes manually, holding the mounting bracket 21 and slowly floating it on the surface of the coolant. By flipping the clamping plate 42 outward, the mesh plate assembly is removed from the clamp 40. Under the action of the water flow, the mounting bracket 21 abuts against the left inner wall of the cooling water tank 10 (see reference). Figure 8 The left side) and then the mounting bracket 21 part after being separated will not interfere with the extrusion strip 70. Finally, the operator holds the rear of the grid plate assembly (that is, the material strip 60 at the rear away from the head of the extrusion strip 70). At this time, the material strip 60 and the front end of the extrusion strip 70 can be directly fed into the pelletizer for pelletizing.

[0031] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A POM-modified plastic granule production apparatus, characterized in that, include: A cooling water tank (10) is used to contain coolant for cooling and shaping the extrusion strips (70) inside; a circulating water drive assembly (30) is fixed on the cooling water tank (10) and is used to drive the coolant to flow directionally along the length of the tank; a dragging mechanism (20) is vertically immersed in the coolant in the cooling water tank (10) and moves linearly along the cooling water tank (10) under the thrust of the liquid flow generated by the circulating water drive assembly (30); multiple sets of grippers (40) are fixed on the dragging mechanism (20); the grippers (40) The upper clamp holds the material strip (60), the material of which is the same as the material being processed, and its axial direction is perpendicular to the movement direction of the dragging mechanism (20); multiple material strips (60) are arranged in parallel to form a bearing structure; the freshly extruded hot melt extrusion strip (70) is adhered to the bearing structure and forms a grid plate to achieve the side-by-side positioning of multiple extrusion strips (70); the flow equalization component (50) is fixedly installed in the cooling water tank (10) and located at the outlet end of the circulating water drive component (30) to maintain the smooth flow of coolant.

2. The POM-modified plastic granule production apparatus according to claim 1, characterized in that, The inner wall of the cooling water tank (10) is symmetrically fixed with guide rails (11), which extend along the length of the cooling water tank (10) and are immersed in the coolant. The towing mechanism (20) includes a mounting frame (21), the bottom of which is fixed with a plurality of hollow floats (24) to provide buoyancy so that the mounting frame (21) is suspended in the coolant; The mounting bracket (21) is provided with multiple lower rollers (22) and side rollers (23) on both sides respectively. The lower rollers (22) are supported on the bottom surface of the guide rail (11), and the side rollers (23) abut against the side of the guide rail (11) to limit the displacement trajectory of the mounting bracket (21) under the thrust of the liquid flow, so that the dragging mechanism (20) moves linearly along the guide rail (11) under the drive of the circulating water drive assembly (30); The guide rail (11) has clearances between its two ends in the length direction of the cooling water tank (10) and the corresponding inner sidewalls of the cooling water tank (10). The mounting bracket (21) has a shovel plate (43) fixed on the side away from the circulating water drive assembly (30).

3. The POM-modified plastic granule production apparatus according to claim 2, characterized in that, The clamp (40) includes a clamp plate one (41) fixed on the mounting frame (21) and a clamp plate two (42) hinged to one side of the clamp plate one (41). Magnets (44) are fixed on the opposite inner surfaces of the clamping plate one (41) and the clamping plate two (42), and the magnets (44) on the clamping plate one (41) and the magnets (44) on the clamping plate two (42) are set to opposite magnetic poles; When clamping plate two (42) rotates and closes around the hinge axis, the magnetic attraction force of magnet (44) presses the material strip (60) tightly between clamping plate one (41) and clamping plate two (42) to achieve rapid closing and self-locking of clamping device (40).

4. The POM-modified plastic granule production apparatus according to claim 3, characterized in that, The circulating water drive assembly (30) includes a water pump (31), which is connected to an outlet pipe (32) and an inlet pipe (34). The cooling water tank (10) is fixed with a partition plate (12) placed below the float (24). The partition plate (12) divides the inner cavity of the tank into an upper cooling zone and a lower return water zone. The partition plate (12) has multiple drain holes (121) on the side away from the outlet pipe (32). The outlet pipe (32) is connected to the cooling zone, and the inlet pipe (34) is connected to the return water zone, thereby forming a closed-loop circulation of coolant in the cooling water tank (10).

5. The POM-modified plastic granule production apparatus according to claim 4, characterized in that, The flow equalization assembly (50) includes an upward-turning water plate (51) and an overflow plate (53) vertically fixed on the partition plate (12), and a downward-turning water plate (52) fixed to the inner wall of the cooling water tank (10). A flow gap is reserved between the down-turning water plate (52) and the partition plate (12) for the coolant to pass through; The top of the upward-turning water plate (51) is higher than the top of the overflow plate (53) and lower than the top of the downward-turning water plate (52); The upper edge of the overflow plate (53) is higher than the axis height of the pressure roller (14) set in the cooling water tank (10) so as to form a stable immersion cooling liquid level by utilizing the height difference between the overflow plate (53) and the pressure roller (14), and to transform the circulating water flow into a stable laminar flow through a multi-stage baffle structure.

6. The POM-modified plastic granule production apparatus according to claim 5, characterized in that, The clamping surfaces of clamping plate one (41) and clamping plate two (42) are provided with V-shaped grooves (411). When clamping plate one (41) and clamping plate two (42) are closed, the two sets of V-shaped slots (411) enclose a clamping space for accommodating the strip (60); and restrict the radial movement and circumferential rotation of the strip (60) by means of the inclined surface.

7. The POM-modified plastic granule production apparatus according to claim 6, characterized in that, The clamping plate 2 (42) includes a movable plate (421) and a pressure plate (423) for direct contact with the strip (60). A spring sheet (422) is connected between the movable plate (421) and the pressure plate (423). When the clamping plate (42) is closed, the spring sheet (422) undergoes elastic deformation to adaptively press the pressure plate (423) onto the surface of the material strip (60).

8. The POM-modified plastic granule production apparatus according to claim 7, characterized in that, The clamping port of the pressure plate (423) is set away from the water outlet direction of the water pump (31) in the circulating water drive assembly (30); When the dragging mechanism (20) moves under the thrust of the liquid flow, the back of the movable plate (421) is subjected to the pressure of the water flow, which makes the pressure plate (423) tend to stick tightly to the material strip (60), thereby offsetting the impact force of the water flow on the front of the pressure plate (423) and preventing the pressure plate (423) from flipping or loosening under the impact of the water flow.

9. The POM-modified plastic granule production apparatus according to claim 8, characterized in that, The partition plate (12) has an installation port, through which a filter screen plate (13) placed in the return water area is installed.

10. A method of using a POM-modified plastic granule production device, characterized in that, The POM-modified plastic granule production apparatus according to claim 9 includes the following steps: S1. Mesh plate construction: Multiple strips (60) of the same material as the material being processed are fixed on the mounting frame (21) of the dragging mechanism (20) by clamps (40) to complete the clamping, so that multiple strips (60) are arranged in parallel to form a grid-like load-bearing structure. S2, Extrusion and Adhesion: Start the extruder and guide the freshly extruded hot melt extruded strip (70) to the inlet of the cooling water tank (10), so that multiple extruded strips (70) are respectively adhered to the material strip (60) of the bearing structure to form a grid plate-like assembly; S3, Immersion Positioning: The float (24) at the bottom of the mounting bracket (21) provides buoyancy, so that the towing mechanism (20) is suspended in the liquid, and the movement trajectory of the towing mechanism (20) is limited by the cooperation of the guide rail (11) and the roller; S4, Hydraulic drive and cooling: Start the circulating water drive assembly (30), and the water pump (31) pumps the coolant from the lower return water zone into the upper cooling zone through the outlet pipe (32); the coolant forms a stable laminar flow after passing through the flow equalization assembly (50) and undergoing multiple deflections; the dragging mechanism (20) is suspended under the buoyancy provided by the float (24), and under the thrust of the laminar liquid, it drives the grid plate assembly on it to move linearly along the guide rail (11) toward the pelletizer; S5. Separation and pelletizing: After cooling and shaping, the mesh plate assembly and the extrusion strip (70) are moved to the end of the cooling water tank (10). Then, the rear of the mesh plate assembly is held by hand, and the front end of the material strip (60) and the extrusion strip (70) are directly fed into the pelletizer for pelletizing.

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