Plastic master batch processing plastic extruding machine and plastic extruding process thereof

Abstract

The invention belongs to the technical field of plastic extruding machines, and discloses a plastic master batch processing plastic extruding machine and an extruding technology thereof.The plastic master batch processing plastic extruding machine comprises a machine shell, a first feeding hopper is fixedly installed at the top end of the machine shell, a screw is rotationally connected to an inner cavity of the first feeding hopper, a ball screw is meshed with the middle of the screw, and a driving motor is fixedly installed at the right end of the machine shell; a machine head is fixedly installed at the left end of the machine shell, and a bearing is fixedly installed at the right end of the machine head. A sealing ring makes contact with and seals a one-way air pipe, at the moment, due to the fact that air cannot continue to flow into the one-way air pipe, the pressure intensity in an air box is increased to reach the opening pressure of a pressure pipe, and at the moment, air flows towards the pressure pipe, a push shaft is pushed leftwards, and the bottom end of a rotating plate moves upwards; furthermore, the space between the bottom end of the rotating plate and one side wall of the feeding hopper is reduced, the discharging amount of the melt is reduced, the situation that the extrusion pressure is increased is avoided, and the product quality is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of extruders, in particular to a plastic masterbatch processing extruder and an extrusion process thereof. Background Art

[0002] Twin-screw extruder is a commonly used plastic processing equipment. Raw materials are placed into the extruder, and the screw drives the raw materials to melt and mix inside the extruder. After cooling, the raw materials are discharged from the extruder head to form the desired shape.

[0003] The existing extruder for processing plastic masterbatch is usually to mix powder (such as carbon black) and solid (such as modified polyresin) together in a twin-screw extruder, then melt and extrude, then cool and granulate, and then introduce the masterbatch into the extruder, melt it to form a spinning melt, and then pass it through a spinning machine to spin. The solid is directly put into the extruder for heating and melting, which may cause problems such as insufficient melting and insufficient mixing. Therefore, this process step needs to be further optimized;

[0004] Moreover, regarding the existing twin-screw extruder, if the melt temperature is too high in actual operation, the melt with too high temperature may flow too fast when entering the feed hopper, thereby increasing the extrusion pressure of the twin-screw extruder, resulting in defects such as inconsistent size, rough surface or bubbles in the extruded product, thereby reducing the quality of the product. Summary of the invention

[0005] The object of the present invention is to provide a plastic masterbatch processing extruder and an extrusion process thereof, so as to solve the problem of poor product quality caused by high flow rate due to excessively high melt temperature mentioned in the background technology.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a plastic masterbatch processing extruder, comprising a casing, a feed hopper 1 is fixedly installed on the top of the casing, a screw is rotatably connected to the inner cavity of the feed hopper 1, a ball screw is meshed in the middle of the screw, a driving motor is fixedly installed on the right end of the casing, a machine head is fixedly installed on the left end of the casing, a bearing is fixedly installed on the right end of the machine head, a top block is fixedly installed on the inner wall of the bearing, a sliding ring is fixedly installed on the right end of the ball screw, a plug-in shaft is fixedly installed on the end of the sliding ring and the top block close to the screw, plug-in holes are provided on the left and right ends of the screw, a blade is rotatably connected to the middle of the feed hopper 1, and the front end of the blade is fixedly installed There is a half gear, an air box is fixedly installed at the front end of the feed hopper, the inner cavity of the air box is movably connected with a lifting plate, the bottom end of the lifting plate is fixedly installed with a rack, the top of the air box is fixedly installed with a one-way air pipe and a one-way air inlet pipe, the surface of the sliding ring is movably sleeved with a synchronous frame, the right end of the synchronous frame is fixedly installed with a moving tube, the surface of the moving tube is slidably sleeved with a fixed tube, the inside of the moving tube is fixedly installed with a tension spring, the left end of the casing is fixedly installed with a top pipe, the inner cavity of the top pipe is slidably connected with a lifting shaft, the end of the lifting shaft close to the casing is fixedly installed with a connecting frame, the end of the connecting frame close to the casing is rotatably connected with a roller, and a compression spring is fixedly installed between the connecting frame and the casing.

[0007] Preferably, a pressure tube is fixedly installed on the top of the air box, the inner cavity of the feed hopper 1 is rotatably connected with a rotating plate, a telescopic rod 1 is fixedly installed on the rear end of the pressure tube, a push shaft is fixedly installed on the left end of the telescopic rod 1, a return spring is sleeved on the surface of the telescopic rod 1, a mounting frame is fixedly installed on the inner cavity of the one-way air pipe, a telescopic rod 2 is fixedly installed on the end of the mounting frame close to the air box, a closing plate is fixedly installed on the end of the telescopic rod 2 close to the air box, a closing ring is fixedly installed on the inner cavity of the one-way air pipe, and buttons and alarms are respectively fixedly installed on both ends of the closing ring.

[0008] Preferably, the upper and lower ends of the machine head are connected to the housing by bolts, and the machine head is located in the middle of the roller and contacts the roller.

[0009] Preferably, the top end of the fixed pipe is fixedly connected to the one-way air pipe, there are two top pipes, one above and one below, the right ends of the two top pipes are fixedly connected to the one-way air pipe, and a pressure relief valve is provided at the bottom end of the one-way air pipe.

[0010] Preferably, the button is electrically connected to the alarm, the diameter of the closed plate is larger than the inner diameter of the closed ring and smaller than the outer diameter of the closed ring, and the button is located at one end of the closed ring close to the closed plate.

[0011] Preferably, a heating device and a cooling device are provided on the surface of the casing, the cooling device is located on the left side of the heating device, and a second feed hopper is fixedly installed on the top of the casing.

[0012] Preferably, the sliding ring is slidably sleeved on the sliding bar, the plug-in shaft fixedly connected to the top block is plugged into the plug-in hole, and the plug-in shaft on the sliding ring is separated from the plug-in hole.

[0013] Preferably, the rotating plate is located above the blades, the bottom end of the rotating plate is inclined to the left, and the bottom end of the push shaft is in contact with the push shaft.

[0014] Preferably, the half gear is located in the middle of the rack, the half gear is meshed with the rack, and the half gear is located below the lifting plate.

[0015] Preferably, the method comprises the following steps:

[0016] First, the raw materials are prepared, the modified polyester resin is melted to form a melt, and then the powdered carbon black is prepared;

[0017] Then add the raw materials, pour the melt-modified polyester resin into the feed hopper 1 from the top, pour the carbon black powder into the feed hopper 2 from the top, the melt flows downward from the gap between the bottom end of the rotating plate and the side wall of the feed hopper 1 through the guidance of the rotating plate, and then falls on the blade, driving the blade to rotate counterclockwise, and then falls on the screw. As the screw rotates, the melt and carbon black powder are evenly mixed in the screw. When the blade meshes with the left end of the rack, the rack can be driven to move downward. When the blade meshes with the right end of the rack, the rack can be driven to move downward, and then the outside air can be drawn into the air box through the one-way air inlet pipe, and then transported to the one-way air pipe;

[0018] After entering the one-way air pipe, the air enters the fixed pipe and the top pipe respectively through the guidance of the one-way air pipe. The air entering the fixed pipe can push the movable pipe to the left, thereby driving the synchronous frame to move to the left, inserting the plug shaft on the sliding ring into the plug hole, and then starting the drive motor to drive the ball screw to rotate, and drive the feed hopper to rotate through the slide bar and the sliding ring, transporting the melt to the left into the die, controlling the rotation speed of the screw and the temperature of the die, and extruding the mixture into strips. The gas entering the top pipe pushes the lifting shaft to the side away from the casing, so that the roller is separated from the die;

[0019] When the temperature of the melt is high, the flow rate of the melt increases, and the amount of melt passing through the blades per unit time increases, which speeds up the rotation speed of the blades, thereby causing the gas originally stably drawn into the gas box to suddenly increase. At this time, the impact force on the closing plate increases, and the closing plate is pushed toward the closing ring, so that the closing plate and the closing ring contact the closed one-way air pipe, and the button is pressed to connect the start circuit in the alarm, so that the alarm sounds an alarm. At this time, since the air cannot continue to flow into the one-way air pipe, the pressure in the gas box increases to reach the opening pressure of the pressure pipe. At this time, the air flows to the pressure pipe, pushing the push shaft to the left, so that the bottom end of the rotating plate moves upward, thereby reducing the space between the bottom end of the rotating plate and the side wall of the feed hopper, and reducing the amount of melt discharged;

[0020] When the screw needs to be maintained, no melt enters the feed hopper and the blades do not rotate. At this time, there is no gas flow in the one-way air pipe, and the machine head is removed. At this time, the compression spring in the compressed state can push the connecting frame toward the casing under the action of elasticity, so that the roller is pressed on the screw to clamp the screw. At the same time, the tension spring in the stretched state pulls the synchronous frame to the right under the action of elasticity, and pulls the plug-in shaft on the sliding ring out of the plug-in hole. At this time, starting the drive motor can drive the ball screw to rotate, and there is no fixation between the ball screw and the screw, and the screw is clamped by the roller in the vertical direction, so that the ball screw rotates to transport the screw to the left, and the screw is sent out of the device.

[0021] The beneficial effects of the present invention are as follows:

[0022] 1. The present invention provides a rotatable rotating plate in a feed hopper. When the temperature of the melt is high, the flow rate of the melt increases, and the amount of melt passing through the blades per unit time increases, which speeds up the rotation speed of the blades, thereby causing a sudden increase in the gas originally stably drawn into the air box. At this time, the impact force on the closing plate increases and it moves, contacting the closing ring to close the one-way air pipe. At this time, since the air cannot continue to flow into the one-way air pipe, the pressure in the air box increases to reach the opening pressure of the pressure tube. At this time, the air flows into the pressure tube, pushing the push shaft to the left, causing the bottom end of the rotating plate to move upward, thereby reducing the space between the bottom end of the rotating plate and the side wall of the feed hopper, reducing the amount of melt discharged, thereby avoiding the increase in extrusion pressure and improving the quality of the product.

[0023] 2. The present invention arranges a ball screw meshing with the screw on the screw. When no melt enters the feed hopper, the blades are stationary. At this time, the compression spring in a compressed state can push the connecting frame toward the casing under the action of elasticity, thereby pressing the roller on the screw to clamp the screw. At the same time, the tension spring in a stretched state pulls the synchronous frame to the right under the action of elasticity, and draws the plug-in shaft on the sliding ring out of the plug-in hole. At this time, starting the driving motor can drive the ball screw to rotate. There is no fixation between the ball screw and the screw. Through the meshing of the ball screw and the screw, the screw can be driven to move left and out of the casing, so that when taking out the casing, there is no need to use a crowbar or disassemble the transmission structure, and the screw can be automatically taken out. The operation is simple and convenient.

[0024] 3. The present invention sets an alarm in the one-way air pipe. When the melt temperature is high, the closing plate closes the closing ring and presses a button to connect the start circuit in the alarm, causing the alarm to sound, thereby prompting the operator that the melt temperature is high and taking timely measures. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is an overall schematic diagram of the present invention;

[0026] Figure 2 This is a schematic diagram of the roller connection of the present invention;

[0027] Figure 3 For the present invention Figure 2 The enlarged schematic diagram at A in the middle;

[0028] Figure 4 For the present invention Figure 2 The enlarged schematic diagram of point B in the middle;

[0029] Figure 5 This is a schematic diagram of the explosive connection of the bearing of the present invention;

[0030] Figure 6 It is a schematic cross-sectional view of the casing of the present invention;

[0031] Figure 7 This is a schematic diagram of the explosion connection of the synchronous frame of the present invention;

[0032] Figure 8 It is a schematic diagram of the explosion of the ball screw of the present invention;

[0033] Fig. 9 For the present invention Figure 8 The enlarged schematic diagram at C in the middle;

[0034] Fig.10 For the present invention Figure 8 The enlarged schematic diagram at D in the middle;

[0035] Fig.11 It is a schematic cross-sectional view of a one-way trachea of ​​the present invention.

[0036] In the figure: 1, housing; 2, feed hopper 1; 3, screw; 4, ball screw; 5, drive motor; 6, machine head; 7, bearing; 8, top block; 9, slide bar; 10, sliding ring; 11, plug shaft; 12, plug hole; 13, blade; 14, half gear; 15, air box; 16, lifting plate; 17, rack; 18, one-way air pipe; 19, synchronous frame; 20, moving pipe; 21, fixed pipe; 22, tension spring; 23. Top pipe; 24. Lifting shaft; 25. Connecting frame; 26. Roller; 27. Compression spring; 28. One-way air inlet pipe; 29. ​​Pressure pipe; 30. Rotating plate; 31. Push shaft; 32. Telescopic rod one; 33. Reset spring; 34. Mounting frame; 35. Telescopic rod two; 36. Closing plate; 37. Closing ring; 38. Button; 39. Alarm; 40. Heating device; 41. Cooling device; 42. Feed hopper two. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] like Figures 1 to 11As shown, an embodiment of the present invention provides a plastic masterbatch processing extruder, including a casing 1, a feed hopper 2 is fixedly installed on the top of the casing 1, a screw 3 is rotatably connected to the inner cavity of the feed hopper 2, a ball screw 4 is meshed in the middle of the screw 3, a driving motor 5 is fixedly installed on the right end of the casing 1, a machine head 6 is fixedly installed on the left end of the casing 1, a bearing 7 is fixedly installed on the right end of the machine head 6, a top block 8 is fixedly installed on the inner wall of the bearing 7, a sliding ring 10 is fixedly installed on the right end of the ball screw 4, a plug-in shaft 11 is fixedly installed on the end of the sliding ring 10 and the top block 8 close to the screw 3, plug-in holes 12 are provided on the left and right ends of the screw 3, a blade 13 is rotatably connected to the middle of the feed hopper 2, a half gear 14 is fixedly installed on the front end of the blade 13, and a half gear 14 is fixedly installed on the front end of the feed hopper 2. An air box 15 is fixedly installed, the inner cavity of the air box 15 is movably connected with a lifting plate 16, the bottom end of the lifting plate 16 is fixedly installed with a rack 17, the top of the air box 15 is fixedly installed with a one-way air pipe 18 and a one-way air inlet pipe 28, the surface of the sliding ring 10 is movably sleeved with a synchronous frame 19, the right end of the synchronous frame 19 is fixedly installed with a moving tube 20, the surface of the moving tube 20 is slidably sleeved with a fixed tube 21, the inside of the moving tube 20 is fixedly installed with a tension spring 22, the left end of the casing 1 is fixedly installed with a top pipe 23, the inner cavity of the top pipe 23 is slidably connected with a lifting shaft 24, the end of the lifting shaft 24 close to the casing 1 is fixedly installed with a connecting frame 25, the end of the connecting frame 25 close to the casing 1 is rotatably connected with a roller 26, and a compression spring 27 is fixedly installed between the connecting frame 25 and the casing 1;

[0039] By arranging a rotatable rotating plate 30 in the feed hopper 2, when the temperature of the melt is high, the flow rate of the melt increases, and the amount of melt passing through the blade 13 per unit time increases, which speeds up the rotation speed of the blade 13, thereby causing the gas originally stably drawn into the air box 15 to suddenly increase. At this time, the impact force on the closing plate 36 increases and moves, contacting the closing ring 37 to close the one-way air pipe 18. At this time, since the air cannot continue to flow into the one-way air pipe 18, the pressure in the air box 15 increases to reach the opening pressure of the pressure tube 29. At this time, the air flows toward the pressure tube 29, pushing the push shaft 31 to the left, so that the bottom end of the rotating plate 30 moves upward, thereby reducing the space between the bottom end of the rotating plate 30 and the side wall of the feed hopper 2, reducing the amount of melt discharged, thereby avoiding the increase in extrusion pressure and improving the quality of the product.

[0040] Among them, a pressure tube 29 is fixedly installed on the top of the air box 15, a rotating plate 30 is rotatably connected to the inner cavity of the feed hopper 2, a telescopic rod 32 is fixedly installed on the rear end of the pressure tube 29, a push shaft 31 is fixedly installed on the left end of the telescopic rod 32, a return spring 33 is sleeved on the surface of the telescopic rod 32, a mounting frame 34 is fixedly installed on the inner cavity of the one-way air pipe 18, a telescopic rod 2 35 is fixedly installed on one end of the mounting frame 34 close to the air box 15, a closing plate 36 is fixedly installed on one end of the telescopic rod 2 35 close to the air box 15, a closing ring 37 is fixedly installed on the inner cavity of the one-way air pipe 18, and a button 38 and an alarm 39 are fixedly installed on both ends of the closing ring 37;

[0041] By setting a ball screw 4 meshing with the screw 3 on the screw 3, when no melt enters the feed hopper 2, the blade 13 is stationary. At this time, the compression spring 27 in the compressed state can push the connecting frame 25 toward the casing 1 under the action of elasticity, so that the roller 26 is pressed on the screw 3 to clamp the screw 3. At the same time, the tension spring 22 in the stretched state pulls the synchronous frame 19 to the right under the action of elasticity, and draws the plug-in shaft 11 on the sliding ring 10 out of the plug-in hole 12. At this time, starting the driving motor 5 can drive the ball screw 4 to rotate, and there is no fixation between the ball screw 4 and the screw 3. Through the meshing of the ball screw 4 and the screw 3, the screw 3 can be driven to move left and sent out of the casing 1, so that when the casing 1 is taken out, there is no need to use a crowbar and disassemble the transmission structure, and the screw 3 can be automatically taken out, which is simple and convenient to operate.

[0042] The upper and lower ends of the machine head 6 are connected to the housing 1 by bolts, and the machine head 6 is located in the middle of the roller 26 and contacts the roller 26;

[0043] By providing a rotatable roller 26, when taking out the screw 3, the roller 26 can not only be clamped on the screw 3 to prevent the screw 3 from rotating, but also the screw 3 can slide smoothly to the left through the rolling friction between the screw 3 and the roller 26, thereby ensuring that the screw 3 can be taken out.

[0044] The top of the fixed pipe 21 is fixedly connected to the one-way air pipe 18, and there are two top pipes 23, one above the other. The right ends of the two top pipes 23 are fixedly connected to the one-way air pipe 18, and a pressure relief valve is provided at the bottom of the one-way air pipe 18.

[0045] By setting the pressure relief valve, when the melt temperature meets the requirements, the amount of melt passing through the blade 13 per unit time remains unchanged, and the half gear 14 is in a stable rotation state, that is, the rotation speed remains unchanged, thereby achieving a constant amount of air drawn into the air box 15 per unit time. When the air pushes the push shaft 31 and the moving tube 20 in the one-way air pipe 18, the pressure in the one-way air pipe 18 increases, and when the opening pressure of the pressure relief valve is reached, pressure relief begins through the pressure relief valve.

[0046] The button 38 is electrically connected to the alarm 39, the diameter of the closing plate 36 is larger than the inner diameter of the closing ring 37 and smaller than the outer diameter of the closing ring 37, and the button 38 is located at one end of the closing ring 37 close to the closing plate 36;

[0047] By setting an alarm 39 in the one-way air pipe 18, when the melt temperature is high, while the closing plate 36 closes the closing ring 37, the closing plate 36 will also press the button 38 to connect the starting circuit in the alarm 39, causing the alarm 39 to sound an alarm, thereby prompting the operator that the melt temperature is high and taking timely measures.

[0048] The surface of the housing 1 is provided with a heating device 40 and a cooling device 41, the cooling device 41 is located on the left side of the heating device 40, and a feed hopper 2 42 is fixedly installed on the top of the housing 1;

[0049] The cooling device 41 cools the melt during extrusion to form the product. The heating device 40 can be used to keep the melt warm and heat the melt below the ideal working temperature to avoid adhesion and ensure smooth extrusion.

[0050] The sliding ring 10 is slidably sleeved on the sliding bar 9, the plug-in shaft 11 fixedly connected to the top block 8 is plugged into the plug-in hole 12, and the plug-in shaft 11 on the sliding ring 10 is separated from the plug-in hole 12;

[0051] The slide bar 9 provides a guide for the sliding of the slide ring 10 , and when the ball screw 4 rotates, the slide bar 9 can drive the slide ring 10 to rotate, thereby driving the screw 3 to rotate to work.

[0052] The rotating plate 30 is located above the blade 13, the bottom end of the rotating plate 30 is tilted to the left, and the bottom end of the push shaft 31 is in contact with the push shaft 31;

[0053] The melt is poured into the feed hopper 2 from the top, and guided by the rotating plate 30, flows downward from the gap between the bottom end of the rotating plate 30 and the side wall of the feed hopper 2, and then falls on the blade 13. The pressure in the air box 15 increases to reach the opening pressure of the pressure tube 29. At this time, the air flows to the pressure tube 29, pushing the push shaft 31 to the left, so that the bottom end of the rotating plate 30 moves upward, thereby reducing the space between the bottom end of the rotating plate 30 and the side wall of the feed hopper 2, and reducing the amount of melt discharged.

[0054] The half gear 14 is located in the middle of the rack 17, the half gear 14 is meshed with the rack 17, and the half gear 14 is located below the lifting plate 16;

[0055] When the blade 13 is engaged with the left end of the rack 17, the rack 17 can be driven to move downward. When the blade 13 is engaged with the right end of the rack 17, the rack 17 can be driven to move downward, so that the outside air can be drawn into the air box 15 through the one-way air inlet pipe 28 and then transported to the one-way air pipe 18.

[0056] The steps include:

[0057] First, the raw materials are prepared, the modified polyester resin is melted to form a melt, and then the powdered carbon black is prepared;

[0058] Then, the raw materials are added, and the melt-modified polyester resin is poured into the feed hopper 1 from the top 2, and the carbon black powder is poured into the feed hopper 2 from the top 42. The melt flows downward from the gap between the bottom end of the rotating plate 30 and the side wall of the feed hopper 1 2 under the guidance of the rotating plate 30, and then falls on the blade 13, driving the blade 13 to rotate counterclockwise, and then falls on the screw 3. As the screw 3 rotates, the melt and the carbon black powder are evenly mixed in the screw 3. When the blade 13 is engaged with the left end of the rack 17, the rack 17 can be driven to move downward. When the blade 13 is engaged with the right end of the rack 17, the rack 17 can be driven to move downward, and then the outside air can be drawn into the air box 15 through the one-way air inlet pipe 28, and then transported to the one-way air pipe 18;

[0059] After entering the one-way air pipe 18, the air enters the fixed pipe 21 and the top pipe 23 respectively through the guidance of the one-way air pipe 18. The air entering the fixed pipe 21 can push the movable pipe 20 to the left, thereby driving the synchronous frame 19 to move to the left, and inserting the plug shaft 11 on the sliding ring 10 into the plug hole 12. At this time, starting the driving motor 5 can drive the ball screw 4 to rotate, and drive the feed hopper 2 to rotate through the slide bar 9 and the sliding ring 10, so as to transport the melt to the left into the head 6, control the rotation speed of the screw 3 and the temperature of the head 6, and extrude the mixture into strips. The gas entering the top pipe 23 pushes the lifting shaft 24 to the side away from the casing 1, so that the roller 26 is separated from the head 6;

[0060] When the temperature of the melt is high, the flow rate of the melt increases, and the amount of melt passing through the blade 13 per unit time increases, which speeds up the rotation speed of the blade 13, thereby causing the gas originally stably drawn into the gas box 15 to suddenly increase. At this time, the impact force on the closing plate 36 increases, pushing the closing plate 36 toward the closing ring 37, so that the closing plate 36 and the closing ring 37 contact the closed one-way air pipe 18, and pressing the button 38 to connect the start circuit in the alarm 39, so that the alarm 39 sounds an alarm. At this time, since the air cannot continue to flow into the one-way air pipe 18, the pressure in the gas box 15 increases to reach the opening pressure of the pressure pipe 29. At this time, the air flows into the pressure pipe 29, pushing the push shaft 31 to the left, so that the bottom end of the rotating plate 30 moves upward, thereby reducing the space between the bottom end of the rotating plate 30 and the side wall of the feed hopper 2, and reducing the amount of melt discharged;

[0061] When the screw 3 needs to be maintained, no melt enters the feed hopper 2, and the blade 13 does not rotate. At this time, there is no gas flow in the one-way air pipe 18, and the head 6 is removed. At this time, the compression spring 27 in the compressed state can push the connecting frame 25 toward the casing 1 under the action of elasticity, so that the roller 26 is pressed on the screw 3 to clamp the screw 3. At the same time, the tension spring 22 in the stretched state pulls the synchronous frame 19 to the right under the action of elasticity, and pulls the plug-in shaft 11 on the sliding ring 10 out of the plug-in hole 12. At this time, starting the drive motor 5 can drive the ball screw 4 to rotate, and there is no fixation between the ball screw 4 and the screw 3, and the screw 3 is clamped by the roller 26 in the vertical direction, so that the ball screw 4 rotates to transport the screw 3 to the left, and the screw 3 is sent out of the device.

[0062] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0063] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plastic masterbatch processing extruder, comprising a housing (1), characterized in that: A feed hopper (2) is fixedly mounted on the top of the casing (1), a screw (3) is rotatably connected to the inner cavity of the feed hopper (2), a ball screw (4) is meshed in the middle of the screw (3), a drive motor (5) is fixedly mounted on the right end of the casing (1), a machine head (6) is fixedly mounted on the left end of the casing (1), a bearing (7) is fixedly mounted on the right end of the machine head (6), a top block (8) is fixedly mounted on the inner wall of the bearing (7), and the ball screw The right end of the feed hopper (4) is fixedly mounted with a sliding ring (10), the sliding ring (10) and the end of the top block (8) close to the screw (3) are fixedly mounted with a plug shaft (11), the left and right ends of the screw (3) are provided with plug holes (12), the middle part of the feed hopper (2) is rotatably connected with a blade (13), the front end of the blade (13) is fixedly mounted with a half gear (14), the front end of the feed hopper (2) is fixedly mounted with an air box (15), the air box ( The inner cavity of the air box (15) is movably connected to a lifting plate (16), the bottom end of the lifting plate (16) is fixedly installed with a rack (17), the top end of the air box (15) is fixedly installed with a one-way air pipe (18) and a one-way air inlet pipe (28), the surface of the sliding ring (10) is movably sleeved with a synchronous frame (19), the right end of the synchronous frame (19) is fixedly installed with a moving pipe (20), the surface of the moving pipe (20) is slidably sleeved with a fixed pipe (21), and the moving pipe ( A tension spring (22) is fixedly installed inside the casing (20), a top pipe (23) is fixedly installed on the left end of the casing (1), a lifting shaft (24) is slidably connected to the inner cavity of the top pipe (23), a connecting frame (25) is fixedly installed on the end of the lifting shaft (24) close to the casing (1), a roller (26) is rotatably connected to the end of the connecting frame (25) close to the casing (1), and a compression spring (27) is fixedly installed between the connecting frame (25) and the casing (1).

2. A plastic masterbatch processing extruder according to claim 1, characterized in that: A pressure tube (29) is fixedly installed on the top of the gas box (15); a rotating plate (30) is rotatably connected to the inner cavity of the feed hopper (2); a telescopic rod (32) is fixedly installed on the rear end of the pressure tube (29); a push shaft (31) is fixedly installed on the left end of the telescopic rod (32); a return spring (33) is sleeved on the surface of the telescopic rod (32); a mounting frame (34) is fixedly installed on the inner cavity of the one-way air pipe (18); a telescopic rod (35) is fixedly installed on one end of the mounting frame (34) close to the gas box (15); a closing plate (36) is fixedly installed on one end of the telescopic rod (35) close to the gas box (15); a closing ring (37) is fixedly installed on the inner cavity of the one-way air pipe (18); a button (38) and an alarm (39) are fixedly installed on both ends of the closing ring (37).

3. A plastic masterbatch processing extruder according to claim 1, characterized in that: The upper and lower ends of the machine head (6) are connected to the housing (1) by means of bolts. The machine head (6) is located in the middle of the roller (26) and is in contact with the roller (26).

4. A plastic masterbatch processing extruder according to claim 1, characterized in that: The top end of the fixed pipe (21) is fixedly connected to the one-way air pipe (18), and there are two top pipes (23) in total, one above the other. The right ends of the two top pipes (23) are both fixedly connected to the one-way air pipe (18), and a pressure relief valve is provided at the bottom end of the one-way air pipe (18).

5. A plastic masterbatch processing extruder according to claim 2, characterized in that: The button (38) and the alarm (39) are electrically connected. The diameter of the closed plate (36) is greater than the inner diameter of the closed ring (37) and smaller than the outer diameter of the closed ring (37). The button (38) is located at one end of the closed ring (37) close to the closed plate (36).

6. A plastic masterbatch processing extruder according to claim 1, characterized in that: A heating device (40) and a cooling device (41) are provided on the surface of the casing (1); the cooling device (41) is located on the left side of the heating device (40); and a second feed hopper (42) is fixedly mounted on the top of the casing (1).

7. A plastic masterbatch processing extruder according to claim 1, characterized in that: The sliding ring (10) is slidably sleeved on the sliding bar (9), the plug-in shaft (11) fixedly connected to the top block (8) is plugged into the plug-in hole (12), and the plug-in shaft (11) on the sliding ring (10) is separated from the plug-in hole (12).

8. A plastic masterbatch processing extruder according to claim 2, characterized in that: The rotating plate (30) is located above the blade (13), the bottom end of the rotating plate (30) is inclined to the left, and the bottom end of the pushing shaft (31) is in contact with the pushing shaft (31).

9. A plastic masterbatch processing extruder according to claim 1, characterized in that: The half gear (14) is located in the middle of the rack (17), the half gear (14) is meshed with the rack (17), and the half gear (14) is located below the lifting plate (16).

10. The extrusion process of a plastic masterbatch processing extruder according to any one of claims 1 to 9, characterized in that: The steps include: First, the raw materials are prepared, the modified polyester resin is melted to form a melt, and then the powdered carbon black is prepared; Add raw materials, pour the melt-modified polyester resin from the top of the feed hopper (2), pour the carbon black powder from the top of the feed hopper (42), and guide the melt through the gap between the bottom of the rotating plate (30) and the side wall of the feed hopper (2) to flow downward, and then fall on the blade (13), driving the blade (13) to rotate counterclockwise, and then fall on the screw (3). As the screw (3) rotates, the melt and the carbon black powder are evenly mixed in the screw (3). When the blade (13) is meshed with the left end of the rack (17), the rack (17) can be driven to move downward. When the blade (13) is meshed with the right end of the rack (17), the rack (17) can be driven to move downward, and then the outside air can be sucked into the air box (15) through the one-way air inlet pipe (28) and then transported to the one-way air pipe (18); After entering the one-way air pipe (18), the air enters the fixed pipe (21) and the top pipe (23) respectively through the guidance of the one-way air pipe (18). The air entering the fixed pipe (21) can push the movable pipe (20) to the left, thereby driving the synchronous frame (19) to move to the left, inserting the plug-in shaft (11) on the sliding ring (10) into the plug-in hole (12). At this time, starting the driving motor (5) can drive the ball screw (4) to rotate, and drive the feed hopper (2) to rotate through the sliding bar (9) and the sliding ring (10), transporting the melt to the left into the head (6), controlling the rotation speed of the screw (3) and the temperature of the head (6), and extruding the mixture into a strip. The gas entering the top pipe (23) pushes the lifting shaft (24) to the side away from the casing (1), so that the roller (26) is separated from the head (6); When the temperature of the melt is high, the flow rate of the melt increases, and the amount of melt passing through the blade (13) per unit time increases, which speeds up the rotation speed of the blade (13), thereby causing the gas originally stably drawn into the gas box (15) to suddenly increase. At this time, the impact force on the closing plate (36) increases, pushing the closing plate (36) toward the closing ring (37), so that the closing plate (36) and the closing ring (37) contact the closed one-way air pipe (18), and pressing the button (38) to connect the start circuit in the alarm (39), so that the alarm (39) sounds an alarm. At this time, since the air cannot continue to flow into the one-way air pipe (18), the pressure in the gas box (15) increases to reach the opening pressure of the pressure pipe (29). At this time, the air flows into the pressure pipe (29), pushing the push shaft (31) to the left, causing the bottom end of the rotating plate (30) to move upward, thereby reducing the space between the bottom end of the rotating plate (30) and the side wall of the feed hopper (2), thereby reducing the amount of melt discharged; When the screw (3) needs to be maintained, no melt enters the feed hopper (2), the blade (13) does not rotate, and no gas flows in the one-way air pipe (18). The machine head (6) is removed, and the compression spring (27) in the compressed state can push the connecting frame (25) toward the machine housing (1) under the action of elasticity, thereby pressing the roller (26) onto the screw (3) to clamp the screw (3). At the same time, the tension spring (27) in the stretched state can push the connecting frame (25) toward the machine housing (1). (22) Under the action of elasticity, the synchronous frame (19) is pulled to the right, and the plug-in shaft (11) on the sliding ring (10) is pulled out of the plug-in hole (12). At this time, the driving motor (5) is started to drive the ball screw (4) to rotate. There is no fixation between the ball screw (4) and the screw rod (3), and the screw rod (3) is clamped by the roller (26) in the vertical direction, so that the ball screw (4) rotates to transport the screw rod (3) to the left, and the screw rod (3) is sent out of the device.

Images