Double-screw extruder convenient to clean

Abstract

The utility model relates to the technical field of twin-screw extruders, in particular to a twin-screw extruder convenient to clean, which comprises a bottom plate, a charging barrel and two screws positioned in the charging barrel, the upper end of the bottom plate is fixedly connected with a support table, the upper end of the support table is fixedly connected with a driving box, the two screws are both rotatably connected to the left end of the driving box, and the two screws are rotatably connected to the right end of the driving box. The right end of the charging barrel is fixedly connected with a graphite sealing gasket abutting against the left end of the driving box. The pressing plate exerts rightward pressure on the pressed plate and the charging barrel, a graphite sealing gasket at the right end of the charging barrel can abut against the driving box tightly, the charging barrel is installed, the pressing plate reversely rotates by 90 degrees, the limiting effect on the pressed plate is relieved, the charging barrel is pulled leftwards, the dovetail-shaped sliding block is separated from the interior of the dovetail-shaped sliding groove, and then the charging barrel is installed. And the two screws are separated from the interior of the charging barrel, so that the charging barrel can be detached, the two screws are separated from the charging barrel at the moment, and when the interiors of the two screws and the charging barrel are cleaned through a cleaning tool, the purpose of convenient cleaning is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to double screw extruder technical field, concretely is a double screw extruder convenient to clean. BACKGROUND

[0002] Double screw extruder is developed on the basis of single screw extruder, and is widely applied to the forming of extruded products at present due to the good feeding performance, mixing plasticizing performance, exhaust performance and extrusion stability.

[0003] The double screw extruder is mainly composed of a transmission device, a barrel and screws, and in the prior art, the two screws are arranged in the barrel and fixedly installed on a transmission shaft, so that the two screws of the double screw extruder are not easy to separate from the barrel, and due to the mutual shielding of the barrel and the two screws, it is very difficult to clean the inside of the two screws and the barrel, and therefore it is necessary to provide a double screw extruder convenient to clean to solve the above problems. SUMMARY

[0004] The utility model discloses a double screw extruder convenient to clean, which has the characteristics of facilitating the separation of the barrel and the two screws, thereby facilitating the cleaning of the inside of the two screws and the barrel.

[0005] To achieve the above object, the utility model provides the following technical scheme: a double screw extruder convenient to clean, including bottom plate, barrel and two screws in the barrel, the upper end of bottom plate is fixedly connected with support table, the upper end of support table is fixedly connected with drive box, two the screw is all rotatably connected in the left end of drive box, the right end of barrel is fixedly connected with graphite gasket that abuts with the left end of drive box,

[0006] The upper end of the support table is fixedly connected with a guide plate, the upper end of the guide plate is provided with a dovetail type sliding groove, and the dovetail type sliding groove is inserted with a dovetail type sliding block matched with the lower end of the barrel and fixedly connected with the lower end of the barrel.

[0007] The dovetail type sliding block extends to the left of the guide plate and is fixedly connected with the lower end of the barrel to form a pressure plate, the left end of the support table is rotatably connected with a lead screw, the outer wall of the lead screw is threadedly connected with a moving block, the upper end of the moving block is fixedly connected with two vertical plates distributed on the left and right, a rotating shaft is rotatably connected between the two vertical plates, a first motor is installed on the left end of the left vertical plate, and the output end of the first motor is fixedly connected with the rotating shaft, the outer wall of the rotating shaft is fixedly connected with a pressing plate abutting against the left end of the pressure plate, and a driving mechanism is arranged on the right side of the lead screw.

[0008] In order to drive the screw rotation, and improve the stability of the screw in the static state, as a kind of convenient cleaning's double screw extruder of the utility model preferably, the driving mechanism includes the first cavity and the second cavity being opened in the inside of support table, the inside rotationally connected with worm of the first cavity, the outer wall of the worm is engaged with worm gear, the worm gear and the screw are fixedly connected with transmission shaft, the inside of the second cavity is installed with the second motor of the output end and the fixed connection of worm.

[0009] In order to drive two screw opposite rotation, the raw material is transported from right to left, as a kind of convenient cleaning's double screw extruder of the utility model preferably, the right end of two screw is fixedly connected with the connecting shaft extending to the inside of drive box, the right end of two connecting shafts is fixedly connected with the gear meshing with each other, the right end of the drive box is installed with the third motor of the output end and the fixed connection of one gear.

[0010] In order to improve the stability of the moving block movement, as a kind of convenient cleaning's double screw extruder of the utility model preferably, the moving block is slidably connected to the upper end of the bottom plate through the slide rail.

[0011] In order to improve the stability of the installation of the screw, as a kind of convenient cleaning's double screw extruder of the utility model preferably, the upper end of the bottom plate is fixedly connected with the stabilizing plate, and the left end of the screw is rotatably connected with the stabilizing plate.

[0012] In order to limit the position of the pressure plate, thereby improving the stability of the pressure plate, as a kind of convenient cleaning's double screw extruder of the utility model preferably, the left end of the pressure plate is provided with a limiting hole, and the right end of the pressure plate is fixedly connected with a limiting block extending into the limiting hole.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] When the barrel is to be installed, the two screws enter the inside of the barrel, and the dovetail sliding block is inserted into the inside of the dovetail sliding groove, thereby positioning the installation position of the barrel, until the graphite sealing gasket at the right end of the barrel contacts the left end of the drive box, then the pressure plate and the limiting block are rotated by ninety degrees, and then the driving mechanism can make the pressure plate and the limiting block move a certain distance to the right, the pressure plate applies right pressure to the pressure plate and the barrel, thereby making the graphite sealing gasket at the right end of the barrel abut closely with the drive box, and the installation of the barrel is completed.

[0015] When the barrel is to be detached, the pressing plate and the limiting block are moved to the left by a certain distance, then the pressing plate is reversely rotated by ninety degrees, the limiting effect on the pressure plate is released, the barrel can be pulled to the left, the dovetail slider is separated from the inside of the dovetail slide groove, and the two screw rods are separated from the inside of the barrel, so that the barrel can be detached, at this time the two screw rods are separated from the barrel, when the inside of the two screw rods and the barrel is cleaned by the cleaning tool, the purpose of convenient cleaning is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a whole front view sectional view of the utility model;

[0017] Figure 2 It is a whole front view sectional view of the utility model; Figure 1 It is an enlarged view of A in the figure;

[0018] Figure 3 It is a partial exploded view of the utility model;

[0019] Figure 4 It is a right view structure view of the pressing plate of the utility model.

[0020] In the figure: 1, bottom plate; 2, support table; 3, drive box; 4, barrel; 5, screw rod; 6, gear; 7, third motor; 8, guide plate; 9, dovetail slider; 10, dovetail slide groove; 11, pressure plate; 12, screw rod; 13, stabilizing plate; 14, moving block; 15, vertical plate; 16, rotating shaft; 17, pressing plate; 18, first motor; 19, limiting hole; 20, limiting block; 21, first cavity; 22, second cavity; 23, worm; 24, worm gear; 25, second motor. DETAILED DESCRIPTION

[0021] The utility model will be further explained in combination with the drawings and specific embodiments, to help understanding the content of the utility model. The method used in the utility model is conventional method if no special provision, the raw materials and devices used are conventional market products if no special provision.

[0022] Please refer to Figures 1 to 4The utility model provides a double screw extruder convenient to clean, including bottom plate 1, material cylinder 4 and two screw rods 5 in the inside of material cylinder 4, the upper end fixed connection of bottom plate 1 has support platform 2, the upper end fixed connection of support platform 2 has drive box 3, two screw rods 5 all are rotatably connected in the left end of drive box 3, the right end fixed connection of material cylinder 4 has the graphite gasket of abutting with the left end of drive box 3. Support platform 2 upper end fixed connection has the guide plate 8, the upper end of guide plate 8 is equipped with dovetail type sliding groove 10, the inside dovetail type sliding groove 10 is inserted with dovetail type sliding block 9 matched with its and with the lower end fixed connection of material cylinder 4, and dovetail type sliding block 9 extends to the left of guide plate 8 and with the lower end of material cylinder 4 is fixedly connected with the pressure plate 11 of being under. The left end rotatable connection of support platform 2 has screw rod 12, and the outer wall of screw rod 12 is connected with moving block 14, and the upper end fixed connection of moving block 14 has two left and right distribution vertical boards 15, and the rotatable connection of two vertical boards 15 has the pivot 16, and the left end of left vertical board 15 is installed with the first motor 18 of the output end fixed connection of pivot 16, and the outer wall fixed connection of pivot 16 has the pressure plate 17 of abutting at the left end of pressure plate 11, and the right side of screw rod 12 is provided with drive mechanism.

[0023] In the embodiment: when installing the material cylinder 4, the two screw rods 5 enter the inside of the material cylinder 4, and the dovetail type sliding block 9 is inserted into the inside of the dovetail type sliding groove 10, and since they are matched with each other, the installation position of the material cylinder 4 can be positioned, the movement of the material cylinder 4 in the front, back, up and down directions is prevented, until the graphite gasket at the right end of the material cylinder 4 contacts the left end of the drive box 3, then the first motor 18 drives the pivot 16 to rotate by 90 degrees, further drives the pressure plate 17 and the limiting block 20 to rotate by 90 degrees, at this time, the limiting block 20 is located at the position right in front of the limiting hole 19, then the drive mechanism drives the screw rod 12 to rotate, further drives the moving block 14 to move to the right by a certain distance, at the same time, drives the two vertical boards 15, the pivot 16, the pressure plate 17 and the limiting block 20 to move to the right by a certain distance, so that the limiting block 20 enters the inside of the limiting hole 19, and the pressure plate 17 applies the right pressure to the pressure plate 11, at the same time, applies the right pressure to the material cylinder 4, further makes the graphite gasket at the right end of the material cylinder 4 abut tightly with the drive box 3, seals the material cylinder 4 and the drive box 3, and completes the installation of the material cylinder 4.

[0024] When the barrel 4 is to be removed, the screw rod 12 is reversely rotated, so that the pressing plate 17 and the limiting block 20 are moved to the left by a certain distance, the limiting block 20 is separated from the inside of the limiting hole 19, the rotating shaft 16 is reversely rotated by 90 degrees through the first motor 18, the pressing plate 17 is reversely rotated by 90 degrees, the limiting effect on the pressing plate 11 is released, the barrel 4 can be pulled to the left, the dovetail sliding block 9 is separated from the inside of the dovetail sliding groove 10, and the two screw rods 5 are separated from the inside of the barrel 4, so that the barrel 4 can be removed, at this time, the two screw rods 5 are separated from the barrel 4, and when the inside of the two screw rods 5 and the barrel 4 is cleaned by the cleaning tool, the cleaning is convenient.

[0025] It should be noted that the inner wall and the outer wall of the barrel 4 are provided with resistance wires, so that the extruded raw materials can be heated to a molten state, and since it is a mature prior art, it is not shown in the figure.

[0026] As a technical optimization scheme of the utility model, the driving mechanism includes a first cavity 21 and a second cavity 22 opened in the inside of the support table 2, a worm 23 is rotationally connected in the inside of the first cavity 21, a worm wheel 24 is meshingly connected to the outer wall of the worm 23, a transmission shaft is fixedly connected between the worm wheel 24 and the screw rod 12, and a second motor 25 with a fixed output end is installed in the inside of the second cavity 22.

[0027] In the embodiment: the second motor 25 drives the worm 23 to rotate, the worm wheel 24 is driven to rotate, the screw rod 12 is driven to rotate through the transmission shaft, and the stability of the screw rod 12 in the static state is improved due to the self-locking characteristics of the worm wheel 24 cooperating with the worm 23.

[0028] As a technical optimization scheme of the utility model, the right ends of the two screw rods 5 are fixedly connected with connecting shafts extending into the inside of the driving box 3, the right ends of the two connecting shafts are fixedly connected with gears 6 meshing with each other, and a third motor 7 with a fixed output end is installed at the right end of the driving box 3 and fixedly connected with one of the gears 6.

[0029] In the embodiment: during work, the raw materials are added into the inside of the barrel 4 through the feeding hopper, one of the gears 6 is driven to rotate through the third motor 7, the other gear 6 is driven to rotate, and the two screw rods 5 are driven to rotate in opposite directions through the two connecting shafts, so that the raw materials are transported from right to left.

[0030] As a technical optimization scheme of the utility model, the moving block 14 is slidably connected to the upper end of the bottom plate 1 through a sliding rail.

[0031] In the embodiment: the sliding rail is arranged to improve the stability of the moving block 14.

[0032] As a technical optimization scheme of the utility model, the upper end of the bottom plate 1 is fixedly connected with a stabilizing plate 13, and the left end of the lead screw 12 is rotationally connected with the stabilizing plate 13.

[0033] In the embodiment, the stabilizing plate 13 is arranged to improve the stability of the installation of the lead screw 12.

[0034] As a technical optimization scheme of the utility model, the left end of the pressure receiving plate 11 is provided with a limiting hole 19, and the right end of the pressure applying plate 17 is fixedly connected with a limiting block 20 extending into the inside of the limiting hole 19.

[0035] In the embodiment, when the limiting block 20 enters the inside of the limiting hole 19, the position of the pressure applying plate 17 can be limited, thereby improving the stability of the pressure applied to the pressure receiving plate 11.

[0036] Working principle:

[0037] When the barrel 4 is to be installed, first, the two lead screws 5 enter the inside of the barrel 4, and the dovetail type sliding block 9 is inserted into the inside of the dovetail type sliding groove 10, and since they are matched with each other, the installation position of the barrel 4 can be positioned, and the barrel 4 is prevented from moving in the front, back, up and down directions, until the graphite gasket at the right end of the barrel 4 contacts the left end of the driving box 3, then the first motor 18 drives the rotating shaft 16 to rotate by 90 degrees, thereby driving the pressure applying plate 17 and the limiting block 20 to rotate by 90 degrees, at this time, the limiting block 20 is located at the position right in front of the limiting hole 19, then the second motor 25 drives the worm 23 to rotate, thereby driving the worm wheel 24 to rotate, and then the transmission shaft drives the lead screw 12 to rotate, thereby driving the moving block 14 to move to the right by a certain distance, and at the same time, the two vertical plates 15, the rotating shaft 16, the pressure applying plate 17 and the limiting block 20 are driven to move to the right by a certain distance, so that the limiting block 20 enters the inside of the limiting hole 19, and at the same time, the pressure applying plate 17 applies a rightward pressure to the pressure receiving plate 11, and a rightward pressure is applied to the barrel 4, thereby making the graphite gasket at the right end of the barrel 4 tightly abut against the driving box 3, and the barrel 4 and the driving box 3 are sealed, and the installation of the barrel 4 is completed, and since the worm wheel 24 cooperates with the worm 23 to have the self-locking feature, the stability of the lead screw 12 in the stationary state is improved.

[0038] When the barrel 4 is to be removed, the screw rod 12 is reversely rotated, so that the pressing plate 17 and the limiting block 20 are moved to the left by a certain distance, the limiting block 20 is separated from the inside of the limiting hole 19, the rotating shaft 16 is reversely rotated by 90 degrees through the first motor 18, the pressing plate 17 is reversely rotated by 90 degrees, the limiting effect on the pressing plate 11 is released, the barrel 4 is pulled to the left, the dovetail sliding block 9 is separated from the inside of the dovetail sliding groove 10, and the two screw rods 5 are separated from the inside of the barrel 4, so that the barrel 4 is removed, at this time, the two screw rods 5 are separated from the barrel 4, when the inside of the two screw rods 5 and the barrel 4 is cleaned through the cleaning tool, the cleaning is convenient.

[0039] In work, the raw materials are added into the inside of the barrel 4 through the feeding hopper, one of the gears 6 is rotated through the third motor 7, the other gear 6 is rotated, the two screw rods 5 are reversely rotated through the two connecting shafts, and the raw materials are transported from right to left.

[0040] In the description of the utility model, it is understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inside", "outside", "back", "middle" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0041] The above is only a specific embodiment of the utility model, and cannot limit the scope of the utility model, so that the replacement of equivalent components or equivalent changes and modifications made in the scope of the utility model patent protection should still belong to the scope covered by the claims of the utility model.

Claims

1. A twin-screw extruder with easy cleaning, comprising a base plate (1), a barrel (4) and two screws (5) inside the barrel (4), characterized in that: The upper end of the bottom plate (1) is fixedly connected with a support table (2), the upper end of the support table (2) is fixedly connected with a drive box (3), both of the two screw rods (5) are rotationally connected to the left end of the drive box (3), and the right end of the barrel (4) is fixedly connected with a graphite gasket abutting against the left end of the drive box (3). The upper end of the support table (2) is fixedly connected with a guide plate (8), the upper end of the guide plate (8) is provided with a dovetail type sliding groove (10), and the dovetail type sliding groove (10) is inserted with a dovetail type sliding block (9) matched with the dovetail type sliding groove (10) and fixedly connected with the lower end of the barrel (4). The dovetail type sliding block (9) extends to the left of the guide plate (8) and is fixedly connected with a pressure receiving plate (11) at the lower end of the barrel (4), the left end of the support table (2) is rotationally connected with a lead screw (12), the outer wall of the lead screw (12) is threadedly connected with a moving block (14), the upper end of the moving block (14) is fixedly connected with two left and right distributed vertical plates (15), the two vertical plates (15) are rotationally connected with a rotating shaft (16), the left end of the left vertical plate (15) is provided with a first motor (18) with an output end fixedly connected with the rotating shaft (16), the outer wall of the rotating shaft (16) is fixedly connected with a pressure applying plate (17) abutting against the left end of the pressure receiving plate (11), and the right side of the lead screw (12) is provided with a driving mechanism.

2. A twin screw extruder for ease of cleaning according to claim 1, characterized in that: The driving mechanism comprises a first cavity (21) and a second cavity (22) formed in the support table (2), the inside of the first cavity (21) is rotationally connected with a worm (23), the outer wall of the worm (23) is meshingly connected with a worm wheel (24), the worm wheel (24) and the lead screw (12) are fixedly connected with a transmission shaft, and the inside of the second cavity (22) is provided with a second motor (25) with an output end fixedly connected with the worm (23).

3. A twin screw extruder for ease of cleaning according to claim 1, characterized in that: The right end of each of the two screw rods (5) is fixedly connected with a connecting shaft extending into the inside of the drive box (3), the right end of each of the two connecting shafts is fixedly connected with a gear (6) meshing with each other, and the right end of the drive box (3) is provided with a third motor (7) with an output end fixedly connected with one of the gears (6).

4. A twin screw extruder for ease of cleaning according to claim 1, characterized in that: The moving block (14) is slidingly connected to the upper end of the bottom plate (1) through a sliding rail.

5. A twin screw extruder for ease of cleaning according to claim 1, characterized in that: The upper end of the bottom plate (1) is fixedly connected with a stabilizing plate (13), and the left end of the lead screw (12) is rotationally connected with the stabilizing plate (13).

6. A twin screw extruder for ease of cleaning according to claim 1, characterized in that: The left end of the pressure receiving plate (11) is provided with a limiting hole (19), and the right end of the pressure applying plate (17) is fixedly connected with a limiting block (20) extending into the inside of the limiting hole (19).

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