Feeding device for screw extruder

Abstract

This utility model discloses a feeding device for a screw extruder, comprising: a barrel, which is vertically arranged; a crusher, including a rotating shaft rotatably mounted on the upper part of the barrel, with multiple striking rods connected to the shaft, the striking rods being arranged radially along the shaft; a first motor mounted on the barrel, the first motor being driven and connected to the rotating shaft; and a discharge ball, in which a sealing seat is embedded in the lower end of the barrel, the sealing seat having a vertically arranged through hole, the discharge ball being rotatably embedded in the through hole, the wall of the through hole being arc-shaped, the arc of the through hole wall matching the arc of the outer wall of the discharge ball, the discharge ball having a through material transmission channel, the two ends of the material transmission channel connecting the barrel and the hopper of the screw extruder; and a second motor mounted on the barrel, the second motor being driven and connected to the discharge ball. This utility model solves the problem of existing extruders easily accumulating large amounts of raw material particles in the hopper, causing blockage.

Description

Technical Field

[0001] This utility model relates to the field of screw extruder technology, and specifically to a feeding device for a screw extruder. Background Technology

[0002] Screw extruders include single-screw extruders and twin-screw extruders. Twin-screw extruders were developed based on single-screw extruders and have been widely used in the molding and processing of extruded products due to their excellent feeding performance, mixing and plasticizing performance, venting performance, and extrusion stability.

[0003] When extruding raw materials using an extruder, a large number of raw material particles can easily accumulate in the extruder hopper, causing blockages. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, a feeding device for a screw extruder is provided to solve the problem that existing extruders are prone to accumulating large amounts of raw material particles in the hopper, causing blockages.

[0005] To achieve the above objectives, a feeding device for a screw extruder is provided, comprising:

[0006] A material cylinder, wherein the material cylinder is arranged vertically;

[0007] A crusher includes a rotating shaft rotatably mounted on the upper part of a material cylinder, a plurality of striking rods connected to the rotating shaft, the striking rods being arranged along the radial direction of the rotating shaft, and a first motor mounted on the material cylinder, the first motor being driven and connected to the rotating shaft;

[0008] The discharge ball has a sealing seat embedded in the lower end of the barrel. The sealing seat has a vertically arranged through hole. The discharge ball is rotatably embedded in the through hole. The wall of the through hole is arc-shaped, and the arc of the through hole wall matches the arc of the outer wall of the discharge ball. The discharge ball has a through material transfer channel. The two ends of the material transfer channel are connected to the barrel and the hopper of the screw extruder. A second motor is installed on the barrel. The second motor drives the discharge ball to rotate. After the discharge ball is driven by the second motor, the opening of the material transfer channel is aligned with the wall of the through hole so that the discharge ball closes the through hole.

[0009] Furthermore, it also includes a controller, which is signal-connected to the first motor and the second motor.

[0010] Furthermore, a Hall effect switch is installed on one side of the upper opening of the through hole, and magnetic components are respectively installed on the opposite sides of the opening of the material transfer channel. The controller signal is connected to the Hall effect switch. After the feeding ball rotates and the magnetic component approaches the Hall effect switch, the controller shuts down the second motor to cause the feeding ball to close the through hole.

[0011] Furthermore, the second motor is a reversible motor.

[0012] Furthermore, a boss is formed on the upper part of the sealing seat, and the boss is arranged in a circle along the circumference of the upper opening of the through hole. The boss has a guide slope that is inclined towards the inside of the upper opening.

[0013] Furthermore, a worm is coaxially connected to the output end of the first motor, and a worm wheel is coaxially connected to the rotating shaft, with the worm meshing with the worm wheel.

[0014] Furthermore, the output end of the second motor is coaxially connected to a drive gear, the discharge ball is connected to a centering shaft, the centering shaft is rotatably mounted on the sealing seat, one end of the centering shaft extends to the outside of the material cylinder and is coaxially connected to a driven gear, the driven gear meshing with the drive gear.

[0015] The beneficial effect of this utility model is that the feeding device of the screw extruder of this utility model is to install a material cylinder above the hopper of the screw extruder, and to install a crusher at the upper part of the material cylinder to crush the accumulated raw material particles. The lower end of the material cylinder is equipped with a discharge ball. By rotating or deflecting the discharge ball, the feeding channel of raw material particles in the material cylinder is closed, so as to avoid a large amount of raw material particles accumulating in the hopper of the extruder and causing blockage. Attached Figure Description

[0016] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0017] Figure 1 This is a schematic diagram of the feeding device of the screw extruder according to an embodiment of the present invention.

[0018] Figure 2 This is a cross-sectional view of the feeding device of the screw extruder according to an embodiment of the present invention.

[0019] Figure 3 This is a schematic diagram showing the open state of the feeding device of the screw extruder according to an embodiment of the present invention.

[0020] Figure 4 This is a schematic diagram of the closed state of the feeding device of the screw extruder according to an embodiment of the present invention.

[0021] Figure label:

[0022] Cylinder 1, sealing seat 11, boss 111, guide slope a;

[0023] Crusher 2, rotating shaft 21, striking rod 22, first motor 23, worm gear 24, worm wheel 25;

[0024] 3. Feeding ball; 30. Feeding channel; 31. Second motor; 32. Centering shaft; 33. Driving gear; 34. Driven gear;

[0025] Screw extruder 4, hopper 41;

[0026] Hall effect switch 5, magnetic component 51. Detailed Implementation

[0027] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] Reference Figures 1 to 4 As shown, this utility model provides a feeding device for a screw extruder, including: a barrel 1, a crusher 2, and a discharge ball 3.

[0030] The material cylinder 1 is vertically arranged. In this embodiment, the material cylinder is cylindrical.

[0031] Crusher 2 is located at the top of the feed cylinder. Feed balls are located at the bottom of the feed cylinder.

[0032] Specifically, the crusher includes a rotating shaft 21, an impact rod 22, and a first motor 23.

[0033] The rotating shaft 21 is rotatably mounted on the upper part of the material cylinder 1. In this embodiment, the rotating shaft is arranged along the radial direction of the material cylinder. The cylinder wall has a shaft hole. The end of the rotating shaft is rotatably inserted into the shaft hole. The rotating shaft 21 is connected to a plurality of striking rods 22. The plurality of striking rods are arranged along the axial direction of the rotating shaft.

[0034] The striking rod 22 is arranged radially along the rotating shaft 21. Multiple striking rods are arranged circumferentially along the rotating shaft. The multiple striking rods circumferentially along the rotating shaft are staggered. A first motor 23 is mounted on the material cylinder 1. The first motor 23 is driven and connected to the rotating shaft 21.

[0035] The first motor is located on the outside of the material cylinder. Specifically, the output end of the first motor 23 is coaxially connected to a worm gear 24. The rotating shaft 21 is coaxially connected to a worm wheel 25. The worm gear 24 meshes with the worm wheel 25.

[0036] In a preferred embodiment, a first protective cover is installed on the outer wall of the barrel. One end of the first motor and its shaft is located inside the first protective cover.

[0037] In some embodiments, a cutting blade is mounted on the striking rod. When the first motor drives the shaft to rotate the striking rod, the cutting blade can cut and crush large pieces of raw material.

[0038] The feeding ball 3 is spherical. A sealing seat 11 is embedded in the lower end of the material cylinder 1. The sealing seat 11 has a through hole. The through hole is vertically oriented. The feeding ball 3 is rotatably embedded in the through hole. The wall of the through hole is arc-shaped. The arc of the through hole wall matches the arc of the outer wall of the feeding ball 3.

[0039] In this embodiment, the upper part of the discharge ball is disposed inside the through hole, and the lower part of the discharge ball extends to the outer side of the lower end of the material cylinder.

[0040] The feeding ball 3 has a through-hole 30. The through-hole is vertically oriented. When the through-hole of the feeding ball is oriented in the same direction as the through hole, the two ends of the through-hole 30 are connected to the barrel 1 and the hopper 41 of the screw extruder 4. At this time, the raw material particles in the barrel can fall into the hopper 41 of the screw extruder 4 through the through-hole.

[0041] A second motor 31 is installed on the feed cylinder 1. The second motor 31 is connected to the feed ball 3. After the feed ball 3 is driven to rotate by the second motor 31, the opening of the feed channel 30 is aligned with the wall of the through hole, so that the feed ball 3 closes the through hole. See reference. Figure 3 As shown, during the production process, when it is necessary to close the feeding of the barrel, the second motor drives the discharge ball to rotate, so that the opening of the material transmission channel is aligned with the wall of the through hole, and the through hole is closed. At this time, the raw material particles in the barrel cannot fall into the hopper 41 of the screw extruder 4 through the material transmission channel.

[0042] In a preferred embodiment, the feeding device of the screw extruder also includes a controller. The controller signal is connected to the first motor 23 and the second motor 31. The operator controls the first and second motors in conjunction with the controller to control the loosening and feeding of raw material particles in the barrel.

[0043] Combination Figure 3 and Figure 4As shown, a Hall effect switch 5 is installed on one side of the upper opening of the through hole. Magnetic elements 51 are installed on opposite sides of the opening of the material conveying channel 30. The controller signal is connected to the Hall effect switch 5. After the feeding ball 3 rotates and the magnetic element 51 approaches the Hall effect switch 5, the controller shuts off the second motor 31 to cause the feeding ball 3 to close the through hole.

[0044] The magnetic components and Hall effect switches are used to indicate whether the material conveying channel is aligned with the through hole of the sealing seat. At this point, the material conveying channel is fully open, and the feeding speed is at its maximum. In some embodiments, the feeding speed is controlled by changing the deflection angle of the discharge ball, i.e., adjusting the deflection angle of the material conveying channel.

[0045] In this embodiment, the second motor 31 is a forward and reverse rotating motor. Continuing with... Figure 3 and Figure 4 As shown, when the second motor rotates forward, it drives the feeding ball to deflect to the left to close the through hole. At this time, the Hall effect switch generates an electrical signal, and the controller receives the electrical signal to shut down the second motor. When it is necessary to open the through hole, the controller controls the second motor to reverse so that the through hole opens. At this time, the magnetic component on the other side of the feeding ball approaches the Hall effect switch, and the Hall effect switch generates an electrical signal again. At this time, the controller shuts down the second motor again, so that the through hole opens.

[0046] In a preferred embodiment, a boss 111 is formed on the upper part of the sealing seat 11. The boss 111 is arranged in a circle along the circumference of the upper opening of the through hole. The boss 111 is formed with a guide slope a inclined towards the inner side of the upper opening. With the provision of the guide slope, the raw material particles in the barrel can flow into the material transfer channel along the guide slope and fall into the hopper 41 of the screw extruder 4.

[0047] In this embodiment, the output end of the second motor 31 is coaxially connected to a drive gear 33. The feeding ball 3 is connected to a centering shaft 32. The centering shaft 32 is rotatably mounted on the sealing seat 11. One end of the centering shaft 32 extends to the outside of the material cylinder 1 and is coaxially connected to a driven gear 34. The driven gear 34 meshes with the drive gear 33.

[0048] The feeding device of this utility model for a screw extruder has a feed cylinder mounted above the hopper of the screw extruder. A crusher is installed at the upper part of the feed cylinder to break up the accumulated raw material particles. A discharge ball is installed at the lower end of the feed cylinder. By rotating or deflecting the discharge ball, the feeding channel of the raw material particles in the feed cylinder is closed, thus avoiding the accumulation of a large amount of raw material particles in the hopper of the extruder and causing blockage.

[0049] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A feeding device for a screw extruder, characterized in that, include: A material cylinder, wherein the material cylinder is arranged vertically; A crusher includes a rotating shaft rotatably mounted on the upper part of a material cylinder, a plurality of striking rods connected to the rotating shaft, the striking rods being arranged along the radial direction of the rotating shaft, and a first motor mounted on the material cylinder, the first motor being driven and connected to the rotating shaft; The discharge ball has a sealing seat embedded in the lower end of the barrel. The sealing seat has a vertically arranged through hole. The discharge ball is rotatably embedded in the through hole. The wall of the through hole is arc-shaped, and the arc of the through hole wall matches the arc of the outer wall of the discharge ball. The discharge ball has a through material transfer channel. The two ends of the material transfer channel are connected to the barrel and the hopper of the screw extruder. A second motor is installed on the barrel. The second motor drives the discharge ball to rotate. After the discharge ball is driven by the second motor, the opening of the material transfer channel is aligned with the wall of the through hole so that the discharge ball closes the through hole.

2. The feeding device for the screw extruder according to claim 1, characterized in that, It also includes a controller, which is signal-connected to the first motor and the second motor.

3. The feeding device for the screw extruder according to claim 2, characterized in that, A Hall effect switch is installed on one side of the upper opening of the through hole, and magnetic components are installed on opposite sides of the opening of the material conveying channel. The controller signal is connected to the Hall effect switch. After the feeding ball rotates and the magnetic component approaches the Hall effect switch, the controller shuts down the second motor to cause the feeding ball to close the through hole.

4. The feeding device for the screw extruder according to claim 3, characterized in that, The second motor is a forward and reverse rotating motor.

5. The feeding device for the screw extruder according to claim 1, characterized in that, The upper part of the sealing seat has a boss, which is arranged in a circle along the circumference of the upper opening of the through hole, and the boss has a guide slope that is inclined towards the inside of the upper opening.

6. The feeding device for the screw extruder according to claim 1, characterized in that, The output end of the first motor is coaxially connected to a worm gear, and the rotating shaft is coaxially connected to a worm wheel, with the worm gear meshing with the worm wheel.

7. The feeding device for the screw extruder according to claim 1, characterized in that, The output end of the second motor is coaxially connected to a drive gear, the discharge ball is connected to a centering shaft, the centering shaft is rotatably mounted on the sealing seat, one end of the centering shaft extends to the outside of the material cylinder and is coaxially connected to a driven gear, the driven gear meshing with the drive gear.

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