Feeding device of plastic extruder

Abstract

The utility model belongs to the technical field of plastic extruders, and particularly relates to a feeding device of a plastic extruder, which comprises a conveying cylinder, a heating pipe is assembled between the conveying cylinder and an outer cylinder, a feeding hopper is communicated with the top side cambered surface of the conveying cylinder, a movable plate is movably mounted on the inner wall of the feeding hopper, and a feeding hole is formed in the feeding hopper. A trigger rod is installed on the bottom side of the movable plate, a trigger switch is assembled on the inner wall of the feeding hopper, a reset spring is fixedly connected between the movable plate and the feeding hopper, an indicator lamp is assembled on the arc face of the outer barrel, and when raw materials enter the feeding hopper, the movable plate is pushed to incline inwards, the movable plate drives the trigger rod to move inwards till the trigger switch is triggered, and the indicator lamp is turned off. The controller controls the indicator light to be turned on, the heating pipe to heat and heat the raw materials, so that the raw materials are easier to melt, the conveying barrel can be heated without preheating, the viscosity and fluidity of the plastic raw materials are better, the phenomenon that the plastic raw materials are blocked at the machine head is reduced, and the extrusion efficiency of the plastic is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic extruders, in particular to a feeding device for a plastic extruder. Background Art

[0002] Extruder is a type of plastic machinery that can fully plasticize and evenly mix materials and form them through a die. Currently, plastic extruders require a feeding device during operation to facilitate the entry of raw materials into the extruder.

[0003] A Chinese patent with announcement number CN218256660U discloses a feeding structure of a plastic extruder, including a fixed seat, a through hole is opened on the upper surface of the fixed seat, through grooves are symmetrically opened on the circumferential outer wall of the conveying cylinder, observation windows are provided in the through grooves, a motor is provided above the conical bucket, a tray is provided between the motor and the conical bucket, the tray is connected to the conical bucket through a support rod, the output shaft of the motor is coaxially connected to the main shaft, and an auger blade is sleeved on the circumferential outer wall of the main shaft; the feeding structure of the plastic extruder is fixed to the plastic extruder by setting a fixed seat and fixing it on the plastic extruder through a fixing bolt with the cooperation of a rubber pad to increase the tightness of the combined installation, the conveying cylinder is plug-in combined with the fixed seat, and the conical bucket is installed on the conveying cylinder, the motor is installed above the conical bucket through the tray, and with the cooperation of the main shaft and the auger blade, it is convenient to convey the material in the conical bucket through the conveying cylinder to the plastic extruder, reducing the influence of blockage inside the conveying cylinder, and the combined installation is convenient and the structure is simple.

[0004] However, the feeding structure of the above-mentioned plastic extruder still has some problems. In practical applications, the plastic raw material inside the conveying cylinder is not heated, which will cause the plastic raw material to have lower viscosity and poor fluidity due to the decrease in temperature, which will cause the plastic raw material to easily clog the machine head during the extrusion process, affecting the extrusion efficiency of the plastic. Therefore, a feeding device for a plastic extruder is proposed to address the above problems. Utility Model Content

[0005] In order to make up for the shortcomings of the prior art and solve the problem that in actual applications, the plastic raw materials inside the conveying cylinder are not heated, which will cause the plastic raw materials to have lower viscosity and poor fluidity due to the decrease in temperature, thereby causing the plastic raw materials to easily clog the machine head during the extrusion process and affect the extrusion efficiency of the plastic, the utility model proposes a feeding device for a plastic extruder.

[0006] The technical solution adopted by the utility model to solve the technical problem is as follows: a feeding device of a plastic extruder described in the utility model comprises a conveying cylinder, an outer cylinder is sleeved on the outside of the conveying cylinder, the length of the outer cylinder is less than the length of the conveying cylinder, a heating tube is arranged between the conveying cylinder and the outer cylinder, the heating tube is sleeved on the outer arc surface of the conveying cylinder, a feed hopper is connected to the top arc surface of the conveying cylinder, hinges are symmetrically installed on the inner walls of both sides of the feed hopper, a movable plate is movably installed on the inner wall of the feed hopper through the hinge, and the bottom side of the movable plate A trigger rod is fixedly installed on the inner wall, and a trigger switch is installed on the inner wall of the feed hopper. The inclination angle between the trigger rod and the movable plate is smaller than the inclination angle between the trigger switch and the inner wall of the feed hopper. The trigger switch is located at the right oblique side of the trigger rod, and a return spring is fixedly connected between the movable plate and the inner wall of the feed hopper. An indicator light is installed on the arc surface of the outer cylinder, which realizes heating of the conveying cylinder without preheating, so that the viscosity and fluidity of the plastic raw material are better, the clogging of the plastic raw material at the machine head is reduced, and the extrusion efficiency of the plastic is improved.

[0007] Preferably, a conveying motor is installed on one side of the conveying cylinder, and a rotating shaft is rotatably installed on the output end of the conveying motor. One end of the rotating shaft passes through the conveying cylinder and is rotatably installed on the inner wall thereof. A spiral blade is rotatably connected to the arc surface of the rotating shaft, and the other end of the conveying cylinder is connected to a discharge pipe, which is connected to the feed end of the extruder to facilitate the transportation of the added raw materials and avoid blockage of the raw materials during transportation.

[0008] Preferably, a feeding barrel is installed on the top side of the feed hopper, a discharge port is provided on the bottom side of the feeding barrel, the discharge port is connected to the feed hopper, two grooves are symmetrically provided on the bottom side of the feeding barrel, an L-shaped plate is installed on the outer wall of the bottom end of the feeding barrel, a telescopic rod is installed inside the L-shaped plate, a baffle is fixedly connected to the end of the action rod of the telescopic rod, and the baffle is slidably installed inside the groove to facilitate the discharge of raw materials.

[0009] Preferably, a screw rod is threaded through the top side of the feeding barrel, a handle is fixedly connected to the top end of the screw rod, an electrode sheet is assembled on the bottom side of the screw rod, four sliding rods are equidistantly slid through the top side edge of the feeding barrel, a floating plate is fixedly connected to the bottom side of the sliding rod, two compression springs are symmetrically fixedly connected between the floating plate and the feeding barrel, the compression springs are sleeved on the arc surfaces of two of the sliding rods, and an electrode sheet is installed on the top side of the floating plate just below the electrode sheet, thereby realizing accurate grasp of the capacity of raw materials to be added and avoiding waste of raw materials.

[0010] Preferably, the bottom end of the feeding barrel is located just below the floating plate and is connected to a feeding pipe, and a solenoid valve is installed on the arc surface of the feeding pipe to facilitate the control of the entry of raw materials.

[0011] Preferably, a controller is installed on one side of the conveying cylinder, and the controller is electrically connected to the trigger switch, the indicator light and the heating tube, wherein the indicator light and the heating tube form a series circuit, and the controller is electrically connected to the electrode sheet, the electric sheet and the solenoid valve, wherein the controller is used for signal transmission of the trigger switch, the electrode sheet and the electric sheet, and for controlling the indicator light, the heating tube and the solenoid valve, thereby improving the accuracy of the feeding mechanism.

[0012] The utility model is beneficial in that:

[0013] 1. When the raw material enters the feed hopper, the utility model pushes the movable plate to tilt inward, and the movable plate drives the trigger rod to move inward until the trigger switch is triggered. After the trigger switch is triggered, the controller controls the indicator light to light up, indicating that the heating tube starts to heat, and heats the raw material in the conveying cylinder to make it easier to melt. When the raw material completely enters the conveying cylinder, the movable plate returns to the initial position under the action of the reset spring, and the trigger rod is also reset, the trigger switch is closed, the controller receives the signal, and controls the indicator light to go out, indicating that the heating tube stops heating, so that the conveying cylinder can be heated without preheating, so that the viscosity and fluidity of the plastic raw material are better, the phenomenon of plastic raw material blocking at the head is reduced, and the extrusion efficiency of the plastic is improved;

[0014] 2. The utility model drives the movement of the screw by turning the handle according to the capacity of raw materials to be added and the liquid level height of the feeding barrel. The rotation of the screw will drive the electrode sheet to move up and down and adjust to the capacity of the raw materials that need to be added. By opening the solenoid valve and conveying the raw materials into the feeding barrel through the feed pipe, the float plate will move upward under the cooperation of the compression spring and the slide rod. When the capacity reaches a certain height, the electrode sheet contacts the electrode sheet and transmits the signal to the inside of the controller. The controller closes the solenoid valve and stops feeding into the feeding barrel, thereby realizing accurate grasp of the capacity of the raw materials that need to be added and avoiding waste of raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 It is a schematic diagram of the main structure;

[0017] Figure 2 It is a schematic diagram of the cross-sectional structure of the conveying cylinder;

[0018] Figure 3 It is a schematic diagram of the internal structure of the feed hopper;

[0019] Figure 4 This is a schematic diagram of the internal structure of the feeding barrel;

[0020] Figure 5 This is a schematic diagram of the enlarged structure of part A.

[0021] In the figure: 1. conveying cylinder; 2. outer cylinder; 3. heating tube; 4. feed hopper; 5. hinge; 6. movable plate; 7. trigger rod; 8. trigger switch; 9. reset spring; 10. indicator light; 11. conveying motor; 12. rotating shaft; 13. spiral blade; 14. discharge pipe; 15. feeding bucket; 16. discharge port; 17. groove; 18. L-shaped plate; 19. telescopic rod; 20. baffle; 21. screw; 22. handle; 23. electrode sheet; 24. slide rod; 25. floating plate; 26. compression spring; 27. electrode sheet; 28. feed pipe; 29. ​​solenoid valve; 30. controller. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-5 As shown, a feeding device of a plastic extruder comprises a conveying cylinder 1, an outer cylinder 2 is sleeved on the outside of the conveying cylinder 1, the length of the outer cylinder 2 is smaller than the length of the conveying cylinder 1, a heating tube 3 is arranged between the conveying cylinder 1 and the outer cylinder 2, the heating tube 3 is sleeved on the outer arc surface of the conveying cylinder 1, a feeding hopper 4 is connected and arranged on the top arc surface of the conveying cylinder 1, hinges 5 are symmetrically and movably installed on the inner walls of both sides of the feeding hopper 4, a movable plate 6 is movably installed on the inner wall of the feeding hopper 4 through the hinge 5, a trigger rod 7 is fixedly installed on the inner wall of the bottom side of the movable plate 6, a trigger switch 8 is arranged on the inner side wall of the feeding hopper 4, an inclination angle between the trigger rod 7 and the movable plate 6 is smaller than the inclination angle between the trigger switch 8 and the inner wall of the feeding hopper 4, the trigger switch 8 is located in the right oblique direction of the trigger rod 7, a reset spring 9 is fixedly connected between the movable plate 6 and the inner wall of the feeding hopper 4, and an indicator light 10 is arranged on the arc surface of the outer cylinder 2;

[0024] A controller 30 is installed on one side of the conveying cylinder 1, and the controller 30 is electrically connected to the trigger switch 8, the indicator light 10, and the heating tube 3 respectively, wherein the indicator light 10 and the heating tube 3 are in series circuit; when working, in actual application, the plastic raw material inside the conveying cylinder 1 is not heated, which will cause the plastic raw material to have a lower viscosity and poor fluidity due to the decrease in temperature, thereby causing the plastic raw material to easily clog the die head during the extrusion process, affecting the extrusion efficiency of the plastic. The raw material enters the conveying cylinder 1 through the feed hopper 4. When the raw material enters the feed hopper 4, it will push the movable plate 6 to tilt inward, and the movable plate 6 drives the trigger rod 7 to move inward until the trigger is triggered. The trigger switch 8 is turned on. After the trigger switch 8 is triggered, the controller 30 receives the signal and controls the indicator light 10 to light up, indicating that the heating tube 3 starts to heat up, and heats the raw material in the conveying cylinder 1 to make it easier to melt. When the raw material completely enters the conveying cylinder 1, the movable plate 6 returns to its initial position under the action of the reset spring 9, and the trigger rod 7 is also reset. The trigger switch 8 is closed, the controller 30 receives the signal and controls the indicator light 10 to go out, indicating that the heating tube 3 stops heating, and the conveying cylinder 1 can be heated without preheating, so that the viscosity and fluidity of the plastic raw material are better, the blockage of the plastic raw material at the head of the machine is reduced, and the extrusion efficiency of the plastic is improved.

[0025] Furthermore, a conveying motor 11 is installed on one side of the conveying cylinder 1, and a rotating shaft 12 is rotatably installed on the output end of the conveying motor 11. One end of the rotating shaft 12 passes through the conveying cylinder 1 and is rotatably installed on the inner wall thereof. A spiral blade 13 is rotatably connected to the arc surface of the rotating shaft 12. The other end of the conveying cylinder 1 is connected to a discharge pipe 14, and the discharge pipe 14 is connected to the feed end of the extruder.

[0026] A feeding barrel 15 is installed on the top side of the feed hopper 4, and a discharge port 16 is provided on the bottom side of the feeding barrel 15. The discharge port 16 is connected to the feed hopper 4, and two grooves 17 are symmetrically provided on the bottom side of the feeding barrel 15. An L-shaped plate 18 is installed on the outer wall of the bottom end of the feeding barrel 15, and a telescopic rod 19 is installed inside the L-shaped plate 18. The end of the action rod of the telescopic rod 19 is fixedly connected with a baffle 20, and the baffle 20 is slidably installed inside the groove 17; when working, the extruder is one of the types of plastic machinery, which can fully plasticize the material And evenly mixed, through the die molding, the current plastic extruder needs to use a feeding device during operation to facilitate the raw materials to enter the extruder, the raw materials enter the feed hopper 4 through the discharge port 16 of the feeding barrel 15, when it is necessary to stop feeding, the telescopic rod 19 contracts, driving the baffle 20 to move inward, blocking the discharge port 16 of the feeding barrel 15, and stopping feeding, when it is necessary to continue feeding, the telescopic rod 19 extends, driving the baffle 20 to move outward, opening the discharge port 16 of the feeding barrel 15, and continuing feeding, which can realize automatic control of the feeding process and improve the working efficiency of the plastic extruder;

[0027] The raw material enters the conveying cylinder 1 through the feed hopper 4, and the conveying motor 11 drives the rotating shaft 12 to rotate, and the rotating shaft 12 drives the spiral blade 13 to rotate to convey the raw material forward. After the raw material is heated, it enters the feed end of the extruder through the discharge pipe 14 for subsequent plastic extrusion processing, which facilitates the conveying of the added raw material and avoids the phenomenon of blockage of the raw material during transportation.

[0028] Furthermore, a screw rod 21 is threaded through the top side of the feeding barrel 15, a handle 22 is fixedly connected to the top end of the screw rod 21, an electrode sheet 23 is mounted on the bottom side of the screw rod 21, four slide rods 24 are equidistantly slidably penetrated at the top side edge of the feeding barrel 15, a floating plate 25 is fixedly connected to the bottom side of the sliding rod 24, two compression springs 26 are symmetrically fixedly connected between the floating plate 25 and the feeding barrel 15, the compression springs 26 are sleeved on the arc surfaces of two of the sliding rods 24, and an electric sheet 27 is installed on the top side of the floating plate 25 just below the electrode sheet 23;

[0029] The bottom end of the feeding barrel 15 is located directly below the floating plate 25 and is connected to a feeding pipe 28, and a solenoid valve 29 is installed on the arc surface of the feeding pipe 28;

[0030] The controller 30 is electrically connected to the electrode sheet 23, the electric sheet 27 and the electromagnetic valve 29, wherein the controller 30 is used to trigger the signal transmission of the switch 8, the electrode sheet 23 and the electric sheet 27, and the control operation of the indicator light 10, the heating tube 3 and the electromagnetic valve 29; during operation, in order to avoid the waste of raw materials, according to the volume of raw materials added as needed, according to the liquid level height of the feeding barrel 15, by rotating the handle 22, the movement of the screw 21 is driven, and the rotation of the screw 21 will drive the electrode sheet 23 to move up and down, and adjust to the volume of raw materials that need to be added, by opening the electromagnetic valve 29, the raw materials are transported into the feeding barrel 15 through the feeding pipe 28, and the floating plate 25 will move upward under the cooperation of the compression spring 26 and the slide bar 24. When the capacity reaches a certain height, the electrode sheet 23 contacts the electric sheet 27 and transmits the signal to the inside of the controller 30, and the controller 30 closes the electromagnetic valve 29 and stops feeding the material to the feeding barrel 15, so as to accurately grasp the volume of raw materials that need to be added and avoid the waste of raw materials.

[0031] Working principle: In order to avoid the waste of raw materials, according to the volume of raw materials added as needed and the liquid level height of the feeding barrel 15, the handle 22 is turned to drive the movement of the screw 21. The rotation of the screw 21 will drive the electrode sheet 23 to move up and down, and adjust to the volume of raw materials that need to be added. By opening the solenoid valve 29, the raw materials are transported into the feeding barrel 15 through the feeding pipe 28, which will make the floating plate 25 move upward under the cooperation of the compression spring 26 and the slide bar 24. When the capacity reaches a certain height, the electrode sheet 23 contacts the electric sheet 27 and transmits the signal to the inside of the controller 30. The controller 30 closes the solenoid valve 29 and stops feeding the materials into the feeding barrel 15, so as to accurately grasp the volume of raw materials that need to be added and avoid the waste of raw materials.

[0032] The raw material enters the feed hopper 4 through the discharge port 16 of the feeding barrel 15. When the material is continuously fed, the telescopic rod 19 extends, driving the baffle 20 to move outward, opening the discharge port 16 of the feeding barrel 15, and continuing to feed the material. This can realize automatic control of the feeding process, thereby improving the working efficiency of the plastic extruder.

[0033] The raw material enters the conveying cylinder 1 through the feed hopper 4. When the raw material enters the feed hopper 4, the movable plate 6 is pushed to tilt inward, and the movable plate 6 drives the trigger rod 7 to move inward until the trigger switch 8 is triggered. After the trigger switch 8 is triggered, the controller 30 receives a signal and controls the indicator light 10 to light up, indicating that the heating tube 3 starts to heat, and heats the raw material in the conveying cylinder 1 to make it easier to melt. When the raw material completely enters the conveying cylinder 1, the movable plate 6 returns to its initial position under the action of the reset spring 9, and the trigger rod 7 is also reset, and the trigger switch 8 is closed. The controller 30 receives a signal and controls the indicator light 10 to go out, indicating that the heating tube 3 stops heating, so that the conveying cylinder 1 can be heated without preheating, so that the viscosity and fluidity of the plastic raw material are better, the blockage of the plastic raw material at the head of the machine is reduced, and the extrusion efficiency of the plastic is improved;

[0034] Then the raw material enters the conveying cylinder 1 through the feed hopper 4, the conveying motor 11 drives the rotating shaft 12 to rotate, and the rotating shaft 12 drives the spiral blade 13 to rotate to convey the raw material forward. After the raw material is heated, it enters the feed end of the extruder through the discharge pipe 14 for subsequent plastic extrusion processing, which is convenient for conveying the added raw material and avoids the phenomenon of blockage of the raw material during conveying;

[0035] When it is necessary to stop feeding, the telescopic rod 19 is retracted, driving the baffle 20 to move inward, blocking the discharge port 16 of the feeding barrel 15, and stopping feeding.

[0036] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0037] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A feeding device for a plastic extruder, Features: The invention comprises a conveying cylinder (1), wherein an outer cylinder (2) is sleeved on the outside of the conveying cylinder (1), wherein the length of the outer cylinder (2) is shorter than the length of the conveying cylinder (1), wherein a heating tube (3) is arranged between the conveying cylinder (1) and the outer cylinder (2), wherein the heating tube (3) is sleeved on the outer curved surface of the conveying cylinder (1), wherein a feed hopper (4) is arranged on the curved surface on the top side of the conveying cylinder (1), wherein hinges (5) are symmetrically and movably mounted on the inner walls of both sides of the feed hopper (4), wherein the inner wall of the feed hopper (4) is movably mounted with a movable The movable plate (6) is provided with a trigger rod (7) fixedly mounted on the inner wall of the bottom side of the movable plate (6), and the inner wall of the feed hopper (4) is provided with a trigger switch (8). The inclination angle between the trigger rod (7) and the movable plate (6) is smaller than the inclination angle between the trigger switch (8) and the inner wall of the feed hopper (4), and the trigger switch (8) is located at the right oblique side of the trigger rod (7). A return spring (9) is fixedly connected between the movable plate (6) and the inner wall of the feed hopper (4), and an indicator light (10) is provided on the arc surface of the outer cylinder (2).

2. A feeding device for a plastic extruder according to claim 1, Features: A conveying motor (11) is installed on one side of the conveying cylinder (1), and a rotating shaft (12) is rotatably installed on the output end of the conveying motor (11). One end of the rotating shaft (12) passes through the conveying cylinder (1) and is rotatably installed on the inner wall thereof. A spiral blade (13) is rotatably connected to the arc surface of the rotating shaft (12). The other end of the conveying cylinder (1) is connected to a discharge pipe (14), and the discharge pipe (14) is connected to the feed end of the extruder.

3. A feeding device for a plastic extruder according to claim 2, Features: A feeding barrel (15) is installed on the top side of the feed hopper (4), and a discharge port (16) is provided on the bottom side of the feeding barrel (15). The discharge port (16) is connected to the feeding hopper (4), and two grooves (17) are symmetrically provided on the bottom side of the feeding barrel (15). An L-shaped plate (18) is installed on the outer wall of the bottom end of the feeding barrel (15), and a telescopic rod (19) is installed inside the L-shaped plate (18). The end of the action rod of the telescopic rod (19) is fixedly connected to a baffle (20), and the baffle (20) is slidably installed inside the groove (17).

4. A feeding device for a plastic extruder according to claim 3, Features: The top side thread of the feeding barrel (15) is penetrated by a screw rod (21), the top end of the screw rod (21) is fixedly connected to a handle (22), the bottom side of the screw rod (21) is equipped with an electrode sheet (23), four slide rods (24) are equidistantly slidably penetrated at the top side edge of the feeding barrel (15), the bottom side of the slide rod (24) is fixedly connected to a floating plate (25), two compression springs (26) are symmetrically fixedly connected between the floating plate (25) and the feeding barrel (15), the compression springs (26) are sleeved on the arc surfaces of two of the slide rods (24), and an electrode sheet (27) is installed on the top side of the floating plate (25) just below the electrode sheet (23).

5. A feeding device for a plastic extruder according to claim 4, Features: The bottom end of the feeding barrel (15) is located directly below the floating plate (25) and is connected to a feeding pipe (28), and a solenoid valve (29) is installed on the arc surface of the feeding pipe (28).

6. A feeding device for a plastic extruder according to claim 5, Features: A controller (30) is installed on one side of the conveying cylinder (1), and the controller (30) is electrically connected to the trigger switch (8), the indicator light (10), and the heating tube (3), wherein the indicator light (10) and the heating tube (3) form a series circuit, and the controller (30) is electrically connected to the electrode sheet (23), the electric sheet (27), and the electromagnetic valve (29), wherein the controller (30) is used for signal transmission of the trigger switch (8), the electrode sheet (23), and the electric sheet (27), and for controlling the indicator light (10), the heating tube (3), and the electromagnetic valve (29).

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