Double-screw extruder

Abstract

The utility model discloses a double-screw extruder, and relates to the technical field of extruders, the double-screw extruder comprises an extruder body and a material storage box, the material storage box is provided with a discharging assembly for placing a plug, the discharging assembly comprises a discharging groove formed in the bottom end of the material storage box, and the position, located at the discharging groove, of the bottom end of the material storage box is fixedly connected with an arc-shaped discharging barrel; through cooperative arrangement of the arc-shaped discharging barrel, the rotating shaft, the material control plate and other structures, during use, materials in the arc-shaped discharging barrel can be moved and conveyed back into the material storage box through the material control plate, so that the materials in the arc-shaped discharging barrel are circulated and prevented from being accumulated together to block the discharging groove, the materials are prevented from being blocked in the hopper as much as possible, and the use safety of the hopper is improved. And the material cannot enter the extruder smoothly.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of extruders, in particular to a double-screw extruder. BACKGROUND

[0002] The double-screw extruder is developed on the basis of the single-screw extruder, has good feeding performance, mixing plasticizing performance, exhaust performance and extrusion stability, and has been widely applied to the forming of extruded products.

[0003] The utility model discloses a double-screw extruder, including bottom box, push groove, double-screw screw group and feed hopper, the push groove sets up at the top of bottom box, the double-screw screw group sets up in the inside of push groove, the feed hopper sets up at the top of one end of push groove, the inside of feed hopper is provided with dredging mechanism, the dredging mechanism includes dredging spiral rod, motor, containing box, fixed assembly, shunt cover and wire, the dredging spiral rod is rotatablely set up in the inside of feed hopper through motor.

[0004] The double-screw extruder provided in the above can rotate the dredging spiral rod through the motor, thereby generating a downward force on the material, assisting the material to fall in the inside of the feed hopper, achieving good dredging effect, preventing the material from being blocked in the hopper and causing the material to fail to smoothly enter the inside of the extruder. Utility model content

[0005] The utility model discloses a double-screw extruder, including bottom box, push groove, double-screw screw group and feed hopper, the push groove sets up at the top of bottom box, the double-screw screw group sets up in the inside of push groove, the feed hopper sets up at the top of one end of push groove, the inside of feed hopper is provided with dredging mechanism, the dredging mechanism includes dredging spiral rod, motor, containing box, fixed assembly, shunt cover and wire, the dredging spiral rod is rotatablely set up in the inside of feed hopper through motor.

[0006] To achieve the above object, the utility model adopts the following technical scheme:

[0007] A double-screw extruder comprises an extruder body and a storage tank, wherein a clogging discharging assembly is arranged on the storage tank, the clogging discharging assembly comprises a discharging groove arranged at the bottom end of the storage tank, an arc-shaped discharging cylinder is fixedly connected to the bottom end of the storage tank at the discharging groove, a discharging slot is arranged at the bottom end of the arc-shaped discharging cylinder, a temporary storage tank is fixedly connected to the bottom end of the storage tank, the bottom end of the temporary storage tank is fixedly connected to the extruder body and communicates with the feeding port of the extruder body, a rotating shaft is rotatably connected to the discharging groove, two annular arrays of material control plates are fixedly connected to the side wall of the rotating shaft, the ends of the material control plates away from the rotating shaft are fitted to the side wall of the discharging groove and are matched with the arc-shaped discharging cylinder, and a motor is arranged on the storage tank and used to drive the rotating shaft to rotate.

[0008] By adopting the above technical scheme, when in use, the motor is started to drive the rotating shaft to rotate, the material control plates are rotated, the discharging groove is opened, the material falls into the arc-shaped discharging cylinder and then falls into the extruder body from the discharging slot to feed the material, when the material is fed too fast, the material is accumulated in the temporary storage tank, when the temporary storage tank is full, the arc-shaped discharging cylinder cannot discharge the material, the material control plates can move the material in the arc-shaped discharging cylinder and convey the material back to the storage tank, the material in the arc-shaped discharging cylinder is circulated, the material is prevented from being accumulated together to block the discharging slot, the material in the temporary storage tank is prevented from being unable to continue to be discharged after being used up, and the problem that the material is blocked in the hopper to fail to smoothly enter the inside of the extruder is avoided.

[0009] Optionally, a multi-hole die is arranged at the extruding end of the extruder body, and the hole diameters of the multi-hole die gradually increase from the center to the two sides.

[0010] By adopting the above technical scheme, the number of extruded materials can be increased by the multi-hole die, and the extrusion efficiency is improved, and meanwhile, the glue discharge pressure is large in the middle and small at the two sides, the materials at the two sides are discharged slowly and are thin and easy to break, the problem of material breakage can be reduced by increasing the diameters of the two holes at the two sides.

[0011] Optionally, a heating pipe is arranged in the multi-hole die and used to control the temperature of the multi-hole die.

[0012] By adopting the above technical scheme, the multi-hole die can be heated and controlled in temperature by the heating pipe, and the extrusion process of the material is more smooth.

[0013] Optionally, the top end of the storage tank is provided with an opening, a sealing plate is arranged at the top end of the side wall of the storage tank, one end of the sealing plate penetrates through the side wall of the storage tank and is inserted into the other side wall of the storage tank, the end of the sealing plate away from the storage tank is fixedly connected with a connecting plate, an electric telescopic rod is arranged at the top end of the side wall of the storage tank, and the output end of the electric telescopic rod is fixedly connected with the connecting plate.

[0014] By adopting the above technical scheme, when not in use, the connecting plate can be moved by starting the electric telescopic rod, the sealing plate is moved, and the opening of the storage box is closed to prevent dust and sundries from entering.

[0015] Optionally, the side wall of the storage box is fixedly connected with a protection box, and the motor is located in the protection box.

[0016] By adopting the above technical scheme, the motor can be protected by the protection box.

[0017] Optionally, one end of the rotating shaft close to the motor is fixedly connected with a first transmission wheel, one side of the first transmission wheel is provided with a second transmission wheel, one end of the second transmission wheel is fixedly connected with a support rod, the end of the support rod away from the second transmission wheel is rotatably connected with the side wall of the protection box, the first transmission wheel and the second transmission wheel are provided with a transmission belt, a plurality of heat dissipation holes are formed in the side walls of the protection box, a rotating rod is rotatably connected with one side of the inner side wall of the protection box, the one end of the rotating rod is fixedly connected with a first bevel gear, the support rod is fixedly connected with a second bevel gear, the first bevel gear is engaged with the second bevel gear, and the rotating rod is fixedly connected with a fan blade.

[0018] By adopting the above technical scheme, when the motor drives the rotating shaft to rotate, the first transmission wheel can be rotated, the support rod can be rotated in cooperation with the second transmission wheel and the transmission belt, the second bevel gear is driven to rotate, the first bevel gear engaged with the second bevel gear is driven to rotate, the rotating rod is driven to rotate, the fan blade is rotated, the hot air generated by the motor in the protection box is discharged through the heat dissipation holes, then the external air is brought into the protection box, air circulation is realized in the protection box, and the temperature generated by the operation of the motor is prevented from accumulating in the protection box, so that the motor is prevented from overheating.

[0019] Optionally, the heat dissipation holes are fixedly connected with dust screens.

[0020] By adopting the above technical scheme, the dust screens can prevent dust and impurities from entering the protection box through the heat dissipation holes.

[0021] Optionally, the top end of the protection box is hingedly connected with a cover plate.

[0022] By adopting the above technical scheme, the motor can be maintained by opening the cover plate.

[0023] In summary, the application has the following beneficial effects:

[0024] 1. The application is provided by the cooperation of the arc-shaped feeding cylinder, rotating shaft and control plate structure, when in use, the rotating shaft is driven to rotate by starting the motor, the control plate is rotated, the discharge chute is opened, the material falls into the arc-shaped feeding cylinder and then falls into the extruder body from the feeding chute to put the material, when the material is put too fast, the material will accumulate in the temporary storage box, when the temporary storage box is full, the arc-shaped feeding cylinder cannot feed, the material in the arc-shaped feeding cylinder can be moved by the control plate and conveyed back to the storage box, so that the material in the arc-shaped feeding cylinder circulates, preventing the material from accumulating together to block the discharge chute, so that the material cannot enter the extruder smoothly after the material in the temporary storage box is used up, and the problem of the material blocking in the hopper is avoided as much as possible;

[0025] 2. When the motor drives the rotating shaft to rotate, the first transmission wheel can be rotated, the support rod is rotated by cooperating with the second transmission wheel and the transmission belt, the second bevel gear is driven to rotate, the first bevel gear meshing with the second bevel gear is rotated to drive the rotating rod to rotate, the fan blade is rotated, the hot air generated when the motor operates in the protection box is discharged through the heat dissipation hole, then the external air is brought into the protection box, so that air circulation in the protection box is realized, and the temperature generated when the motor operates is prevented from accumulating in the protection box, so that the motor overheating is prevented. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is the overall structure schematic diagram of the utility model;

[0027] Figure 2 It is the arc-shaped feeding cylinder structure schematic diagram of the utility model;

[0028] Figure 3 It is the protection box internal overhead structure schematic diagram of the utility model

[0029] Figure 4 It is the Figure 1 A region enlargement structure schematic diagram of the utility model.

[0030] Mark explanation: 1, extruder body; 2, storage box; 3, discharge chute; 4, arc-shaped feeding cylinder; 5, feeding chute; 6, temporary storage box; 7, rotating shaft; 8, control plate; 9, motor; 10, multi-hole die; 11, heating pipe; 12, sealing plate; 13, connecting plate; 14, electric telescopic rod; 15, protection box; 16, first transmission wheel; 17, second transmission wheel; 18, support rod; 19, transmission belt; 20, heat dissipation hole; 21, rotating rod; 22, first bevel gear; 23, second bevel gear; 24, fan blade; 25, dust screen; 26, cover plate. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings Figures 1-4 The application will be further described in detail.

[0032] Please refer to Figures 1-3 A double-screw extruder comprises an extruder body 1 and a storage tank 2, and a blanking assembly for placing a blockage is arranged on the storage tank 2. The blanking assembly comprises a discharge chute 3, an arc-shaped blanking cylinder 4, a blanking chute 5, a temporary storage tank 6, a rotating shaft 7, a material control plate 8 and a motor 9.

[0033] The discharge chute 3 is arranged at the bottom end of the storage tank 2 and is used for discharging materials. The arc-shaped blanking cylinder 4 is fixedly connected to the bottom end of the storage tank 2 and is located at the discharge chute 3, and is used for receiving the materials discharged from the storage tank 2. The blanking chute 5 is arranged at the bottom end of the arc-shaped blanking cylinder 4 and is used for feeding the materials into the extruder body 1. The temporary storage tank 6 is fixedly connected to the bottom end of the storage tank 2 and the arc-shaped blanking cylinder 4 is located in the temporary storage tank 6. The bottom end of the temporary storage tank 6 is fixedly connected to the extruder body 1 and is in communication with the feeding port of the extruder body 1. The rotating shaft 7 is arranged in the discharge chute 3 and is rotatably connected to one side wall of the discharge chute 3 at one end and is fixedly connected to the output end of the motor 9 at the other end. The material control plate 8 is arranged in two and is fixedly connected to the side wall of the rotating shaft 7 and is arranged in a ring array. The end of the material control plate 8 away from the rotating shaft 7 is in close contact with the side wall of the discharge chute 3 and is matched with the arc-shaped blanking cylinder 4, so that when the material control plate 8 rotates, the end away from the rotating shaft 7 keeps in close contact with the inner wall of the arc-shaped blanking cylinder 4.

[0034] In use, the motor 9 is started to drive the rotating shaft 7 to rotate, so that the material control plate 8 rotates, the discharge chute 3 is opened, the materials fall into the arc-shaped blanking cylinder 4 and then fall into the extruder body 1 from the blanking chute 5, and the materials are fed. When the materials are fed too fast, the materials will accumulate in the temporary storage tank 6. When the temporary storage tank 6 is full, the arc-shaped blanking cylinder 4 cannot discharge materials. The material control plate 8 can move the materials in the arc-shaped blanking cylinder 4 and convey them back to the storage tank 2, so that the materials in the arc-shaped blanking cylinder 4 are circulated to prevent the blanking chute 5 from being blocked by the materials accumulated together, and the materials in the temporary storage tank 6 cannot be continuously discharged after the materials are used up, so as to avoid the problem that the materials are blocked in the funnel and cannot smoothly enter the inside of the extruder.

[0035] Refer to Figure 4 A multi-hole die 10 is mounted at the extrusion end of the extruder body 1. The holes of the multi-hole die 10 are arranged along the length direction and the inner diameters of the holes at both sides are larger than those of the remaining holes. The multi-hole die 10 can be used for ten holes, and the inner diameters of the two holes at the most edge are five point five millimeters, and the inner diameters of the remaining eight holes are five millimeters. The multi-hole die 10 can increase the number of extruded materials and improve the extrusion efficiency. At the same time, the glue discharge pressure is large in the middle and small at both sides, the materials at both sides are discharged slowly and are thin and easy to break. By increasing the diameters of the two holes at the most edge, the problem of material breakage can be reduced.

[0036] Refer to Figure 4The heating pipe 11 for temperature control of the multi-hole die 10 is arranged in the multi-hole die 10, and the multi-hole die 10 can be heated and temperature-controlled through the heating pipe 11, so that the extrusion process of the material is more smooth.

[0037] With reference to Figure 1 The top of the storage box 2 is provided with an opening, and the top of one side wall of the storage box 2 is provided with a sealing plate 12. One end of the sealing plate 12 penetrates the one side wall of the storage box 2 and is inserted with the other side wall of the storage box 2. The end of the sealing plate 12 away from the storage box 2 is fixedly connected with a connecting plate 13. The top of the one side wall of the storage box 2 is provided with an electric telescopic rod 14. The output end of the electric telescopic rod 14 is fixedly connected with the connecting plate 13. When not in use, the electric telescopic rod 14 can drive the connecting plate 13 to move, so that the sealing plate 12 moves to close the opening of the storage box 2, preventing dust and sundries from entering.

[0038] With reference to Figure 1 And Figure 3 The one side wall of the storage box 2 is fixedly connected with a protection box 15. The motor 9 is located in the protection box 15, and the motor 9 can be protected by the protection box 15.

[0039] With reference to Figure 3 The end of the rotating shaft 7 close to the motor 9 is fixedly connected with a first transmission wheel 16. The first transmission wheel 16 is provided with a second transmission wheel 17 on one side. The second transmission wheel 17 is fixedly connected with a support rod 18 at one end. The end of the support rod 18 away from the second transmission wheel 17 is rotatably connected with the side wall of the protection box 15. The first transmission wheel 16 and the second transmission wheel 17 are provided with a transmission belt 19. A plurality of heat dissipation holes 20 are formed in the side walls of the protection box 15. A rotating rod 21 is rotatably connected with the side wall of the protection box 15. The end of the rotating rod 21 is fixedly connected with a first bevel gear 22. The support rod 18 is fixedly connected with a second bevel gear 23. The first bevel gear 22 is engaged with the second bevel gear 23. The rotating rod 21 is fixedly connected with a fan blade 24. When the motor 9 drives the rotating shaft 7 to rotate, the first transmission wheel 16 rotates, and the support rod 18 rotates in cooperation with the second transmission wheel 17 and the transmission belt 19, driving the second bevel gear 23 to rotate, and the first bevel gear 22 engaged with the second bevel gear 23 rotates, driving the rotating rod 21 to rotate, and the fan blade 24 rotates. The heat generated by the motor 9 in the protection box 15 is discharged through the heat dissipation holes 20, and then the external air is brought into the protection box 15, so that the air in the protection box 15 circulates, preventing the temperature generated by the motor 9 from accumulating in the protection box 15, causing the motor 9 to overheat.

[0040] With reference to Figure 3 The dust screen 25 is fixedly connected in the heat dissipation hole 20. The dust screen 25 can prevent dust and other impurities from entering the protection box 15 through the heat dissipation hole 20.

[0041] With reference toFigure 1 The top end of the protection box 15 is hingedly connected with a cover plate 26, and the motor 9 is maintained by opening the cover plate 26.

[0042] The implementation principle of the present application is that: in use, the rotating shaft 7 is driven to rotate by starting the motor 9, the material control plate 8 is rotated, the discharge chute 3 is opened, the material falls into the arc-shaped discharging cylinder 4 and then falls into the extruder body 1 from the discharging chute 5, and the material is put in. When the material is put in too fast, the material will accumulate in the temporary storage box 6. When the temporary storage box 6 is full, the arc-shaped discharging cylinder 4 cannot discharge, and the material in the arc-shaped discharging cylinder 4 can be moved by the material control plate 8 and conveyed back to the storage tank 2, so that the material in the arc-shaped discharging cylinder 4 is circulated, preventing the material from accumulating together to block the discharging chute 5, so that the material in the temporary storage box 6 cannot continue to discharge after being used up, and the problem of the material blocking in the hopper and not being able to smoothly enter the inside of the extruder is avoided. At the same time, when the rotating shaft 7 is driven to rotate by the motor 9, the first transmission wheel 16 can be rotated, the support rod 18 can be rotated by cooperating with the second transmission wheel 17 and the transmission belt 19, the second bevel gear 23 is driven to rotate, the first bevel gear 22 meshing with the second bevel gear 23 is driven to rotate, the rotating rod 21 is driven to rotate, the fan blade 24 is driven to rotate, the hot air generated by the motor 9 in the protection box 15 is discharged through the heat dissipation hole 20, then the external air is brought into the protection box 15, air circulation in the protection box 15 is realized, and the temperature generated by the operation of the motor 9 is prevented from accumulating in the protection box 15, so as to prevent the motor 9 from overheating.

[0043] The above only describes preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or equivalently replace some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A double-screw extruder comprising an extruder body (1) and a storage tank (2), wherein a blocked discharging assembly is placed on the storage tank (2), characterized in that: The discharging assembly comprises a discharging groove (3) formed at the bottom end of the storage box (2), the bottom end of the storage box (2) is fixedly connected with an arc-shaped discharging cylinder (4) at the discharging groove (3), the bottom end of the arc-shaped discharging cylinder (4) is formed with a discharging groove (5), the bottom end of the storage box (2) is fixedly connected with a temporary storage box (6), the bottom end of the temporary storage box (6) is fixedly connected on the extruder body (1) and communicates with the feeding port of the extruder body (1), the discharging groove (3) is rotatably connected with a rotating shaft (7), the side wall of the rotating shaft (7) is fixedly connected with two annular arrays of material control plates (8), one end of the material control plates (8) away from the rotating shaft (7) is fitted with the side wall of the discharging groove (3) and is matched with the arc-shaped discharging cylinder (4), and the storage box (2) is provided with a motor (9) for driving the rotating shaft (7) to rotate.

2. A twin-screw extruder according to claim 1, characterized in that: The extruder body (1) is provided with a multi-hole die (10) at the extruding end, the holes of the multi-hole die (10) are arranged along the length direction, and the inner diameters of the holes at both sides are larger than those of the remaining holes.

3. A twin-screw extruder according to claim 2, characterized in that: A heating pipe (11) for controlling the temperature of the multi-hole die (10) is arranged in the multi-hole die (10).

4. A twin-screw extruder according to claim 3, characterized in that: The top end of the storage box (2) is provided with an opening, the top end of the side wall of the storage box (2) is provided with a sealing plate (12), one end of the sealing plate (12) penetrates through the side wall of the storage box (2) and is inserted with the other side wall of the storage box (2), one end of the sealing plate (12) away from the storage box (2) is fixedly connected with a connecting plate (13), the top end of the side wall of the storage box (2) is provided with an electric telescopic rod (14), and the output end of the electric telescopic rod (14) is fixedly connected with the connecting plate (13).

5. A twin-screw extruder according to claim 4, characterized in that: The side wall of the storage box (2) is fixedly connected with a protection box (15), and the motor (9) is located in the protection box (15).

6. A twin-screw extruder according to claim 5, characterized in that: One end of the rotating shaft (7) close to the motor (9) is fixedly connected with a first transmission wheel (16), one side of the first transmission wheel (16) is provided with a second transmission wheel (17), one end of the second transmission wheel (17) is fixedly connected with a supporting rod (18), one end of the supporting rod (18) away from the second transmission wheel (17) is rotatably connected with the side wall of the protection box (15), a transmission belt (19) is arranged on the first transmission wheel (16) and the second transmission wheel (17), a plurality of heat dissipation holes (20) are formed in the side walls of the protection box (15), a rotating rod (21) is rotatably connected with the side wall of the protection box (15), one end of the rotating rod (21) is fixedly connected with a first bevel gear (22), the supporting rod (18) is fixedly connected with a second bevel gear (23), the first bevel gear (22) is engaged with the second bevel gear (23), and a fan blade (24) is fixedly connected with the rotating rod (21).

7. A twin-screw extruder according to claim 6, characterized in that: The heat dissipation holes (20) are fixedly connected with dustproof nets (25).

8. A twin-screw extruder according to claim 7, characterized in that: The top end of the protection box (15) is hingedly connected with a cover plate (26).

Images