Discharging device for double-screw extruder

Abstract

The utility model relates to the technical field of double-screw extruders, and discloses a discharging device for a double-screw extruder, which comprises a mounting seat, a feeding pipe fixedly connected to the bottom of the mounting seat, a cooling bin arranged at the bottom of the feeding pipe, a screening bin fixedly connected to the bottom of the cooling bin, a sleeve shell arranged on one side of the screening bin, and a discharging pipe arranged on the other side of the screening bin. And a discharging rod is rotationally installed in the screening bin, a motor for driving the discharging rod through a coupler is arranged in the sleeve shell, a discharging pipe corresponding to the discharging rod is arranged on the other side of the screening bin, and a screening mechanism is arranged in the screening bin. Extruded materials enter a cooling bin from a feeding pipe to be cooled and hardened, a motor rotates to drive a rotating shaft to rotate through a transmission assembly, so that an eccentric disc rotates, the eccentric disc extrudes a push plate to drive a sieve plate to slide, and the sieve plate slides in a reciprocating mode to sieve the adhered materials through reset fit with a spring; according to the design, extruded materials are cooled and then sieved, so that the quality of discharged products is improved.

Description

Technical Field

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

[0002] At present, twin-screw extruders are one of the types of plastic machinery. According to the direction of the material flow in the die and the angle between the center line of the screw, the die head can be divided into right-angle die head and bevel die head. The screw extruder relies on the pressure and shear force generated by the rotation of the screw to fully plasticize and evenly mix the material, and then form it through the die. Due to its good feeding performance, mixing and plasticizing performance, exhaust performance, extrusion stability and other characteristics, it has been widely used in the molding processing of extruded products.

[0003] The twin-screw extruder of the prior art has certain drawbacks in material discharge. When the extruder discharges material from the discharge pipe, the temperature of the discharged material is relatively high, causing the newly discharged material to stick together, and easily generating lumps during discharge, which greatly affects the product quality. Utility Model Content

[0004] In order to solve the technical problem that the high temperature of the discharged material causes the newly discharged material to stick together, easily generates lumps during the discharge, and greatly affects the product quality, the utility model provides a feeding device for a twin-screw extruder.

[0005] The utility model is implemented by the following technical scheme: a feeding device for a twin-screw extruder, comprising a mounting seat, a feed pipe is fixedly connected to the bottom of the mounting seat, a cooling bin is arranged at the bottom of the feed pipe, a screening bin is fixedly connected to the bottom of the cooling bin, a sleeve is arranged on one side of the screening bin, and a discharge rod is rotatably installed inside the screening bin, a motor for driving the discharge rod through a coupling is arranged inside the sleeve, a discharge pipe corresponding to the discharge rod is arranged on the other side of the screening bin, and a screening mechanism is arranged inside the screening bin and above the discharge rod for screening the cooled material.

[0006] As a further improvement of the above scheme, the screening mechanism includes a screen plate sliding inside the screening bin and a rotating shaft rotating in the casing, the rotating shaft is connected to the output end of the motor through a transmission assembly, one end of the screen plate is fixedly connected to a push plate, and an eccentric disk corresponding to the push plate is arranged on the top of the rotating shaft.

[0007] As a further improvement of the above solution, a top plate is fixedly installed on one side of the screening bin, a spring is fixedly installed inside the top plate, and the other end of the spring is fixedly connected to a side of the screening plate away from the push plate.

[0008] Through the above technical scheme, the motor rotates and the transmission assembly drives the rotating shaft to rotate, so that the eccentric disk rotates, and then the eccentric disk squeezes the push plate to drive the screen plate to slide. By cooperating with the reset of the spring, the screen plate slides back and forth to screen the adhered materials, thereby improving the quality of the product after discharge.

[0009] As a further improvement of the above scheme, an insulating pad is provided at the connection between the feed pipe and the cooling bin, and cooling water is provided inside the cooling bin. One side of the cooling bin is connected to a water inlet pipe, and the other side of the cooling bin is connected to a water outlet pipe.

[0010] Through the above technical solution, the material is cooled by heat exchange through water cooling, and circulated in the inner wall of the cooling bin. Different from the prior art of directly cooling by water spraying, the use of water resources is saved.

[0011] As a further improvement of the above solution, the transmission assembly includes bevel gears respectively connected to the rotating shaft and the output end of the motor, and the two bevel gears are meshedly connected.

[0012] As a further improvement of the above solution, the screening bin and the cooling bin are detachably arranged, and the screening plate runs through both sides of the screening bin.

[0013] Through the above technical solution, the screening bin and the cooling bin can be detachably arranged, so that unqualified materials on the screen plate can be easily removed, which is practical.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The utility model allows the extruded material to enter the cooling bin from the feed pipe for cooling and hardening. The rotation of the motor drives the rotating shaft to rotate through the transmission component, thereby rotating the eccentric disk, and then the eccentric disk squeezes the push plate to drive the screen plate to slide. Through the reset cooperation with the spring, the screen plate slides back and forth to screen the adhered material. This design screens the extruded material after cooling, thereby improving the quality of the product after discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0018] Figure 3 For this utility model Figure 2 Enlarged structural diagram at A in the middle.

[0019] Description of main symbols:

[0020] 1. Mounting seat; 2. Feed pipe; 3. Cooling bin; 4. Screen bin; 5. Discharge pipe; 6. Discharge rod; 7. Housing; 8. Motor; 9. Coupling; 10. Transmission assembly; 11. Rotating shaft; 12. Eccentric disk; 13. Push plate; 14. Screen plate; 15. Top plate; 16. Spring; 17. Insulation pad; 18. Water inlet pipe; 19. Water outlet pipe. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0022] Example:

[0023] Please combine Figure 1 - Figure 3 A feeding device for a twin-screw extruder of the present embodiment includes a mounting base 1, a feed pipe 2 is fixedly connected to the bottom of the mounting base 1, a cooling bin 3 is arranged at the bottom of the feed pipe 2, a screening bin 4 is fixedly connected to the bottom of the cooling bin 3, a casing 7 is arranged on one side of the screening bin 4, and a discharge rod 6 is rotatably installed inside the screening bin 4, a motor 8 is arranged inside the casing 7 for driving the discharge rod 6 through a coupling 9, a discharge pipe 5 corresponding to the discharge rod 6 is arranged on the other side of the screening bin 4, and a screening mechanism is arranged inside the screening bin 4 and above the discharge rod 6 for screening the cooled material.

[0024] Please combine Figure 2 and Figure 3 The screening mechanism includes a screen plate 14 sliding inside the screening bin 4 and a rotating shaft 11 rotating in the casing 7. The rotating shaft 11 is connected to the output end of the motor 8 through a transmission assembly 10. A push plate 13 is fixedly connected to one end of the screen plate 14. An eccentric disk 12 corresponding to the push plate 13 is arranged on the top of the rotating shaft 11.

[0025] Please combine Figure 2 A top plate 15 is fixedly installed on one side of the screening bin 4 , a spring 16 is fixedly installed inside the top plate 15 , and the other end of the spring 16 is fixedly connected to a side of the screen plate 14 away from the push plate 13 .

[0026] The motor 8 rotates and the transmission assembly 10 drives the rotating shaft 11 to rotate, thereby rotating the eccentric disk 12, and then the eccentric disk 12 squeezes the push plate 13 to drive the screen plate 14 to slide. By cooperating with the reset of the spring 16, the screen plate 14 slides back and forth to screen the adhered materials, thereby improving the quality of the product after discharge.

[0027] Please combine Figure 1A heat insulating pad 17 is provided at the connection between the feed pipe 2 and the cooling bin 3, and cooling water is provided inside the cooling bin 3. One side of the cooling bin 3 is connected to a water inlet pipe 18, and the other side of the cooling bin 3 is connected to a water outlet pipe 19.

[0028] The material is cooled by heat exchange through water cooling and circulated in the inner wall of the cooling bin 3, which is different from the prior art of directly cooling by water spraying, thus saving the use of water resources.

[0029] Please combine Figure 3 The transmission assembly 10 includes bevel gears connected to the rotating shaft 11 and the output end of the motor 8 respectively, and the two bevel gears are meshedly connected.

[0030] Please combine Figure 2 The screening bin 4 and the cooling bin 3 are detachably arranged, and the sieve plate 14 runs through both sides of the screening bin 4 .

[0031] The screening bin 4 and the cooling bin 3 are detachably arranged, so that unqualified materials on the screening plate 14 can be easily removed, and the arrangement is practical.

[0032] The implementation principle of a feeding device for a twin-screw extruder in the embodiment of the present application is as follows: when working, the device is installed on the twin-screw extruder through the mounting base 1, the motor 8 is controlled to work, and the extruded material enters the cooling bin 3 from the feed pipe 2 to cool and harden. The motor 8 rotates and drives the rotating shaft 11 to rotate through the transmission assembly 10, thereby rotating the eccentric disk 12, and then the eccentric disk 12 squeezes the push plate 13 to drive the screen plate 14 to slide, and through the reset cooperation with the spring 16, the screen plate 14 slides back and forth to screen the adhered material. When the motor 8 rotates, it also drives the discharge rod 6 to rotate through the coupling 9, and the discharge rod 6 pushes the screened material out of the feed pipe 5 for feeding.

[0033] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A feeding device for a twin-screw extruder, comprising a mounting seat (1), characterized in that: A feed pipe (2) is fixedly connected to the bottom of the mounting seat (1), a cooling bin (3) is arranged at the bottom of the feed pipe (2), a screening bin (4) is fixedly connected to the bottom of the cooling bin (3), a casing (7) is arranged on one side of the screening bin (4), a discharge rod (6) is rotatably mounted inside the screening bin (4), a motor (8) is arranged inside the casing (7) for driving the discharge rod (6) through a coupling (9), a discharge pipe (5) corresponding to the discharge rod (6) is arranged on the other side of the screening bin (4), and a screening mechanism is arranged inside the screening bin (4) and above the discharge rod (6) for screening the cooled material.

2. A feeding device for a twin-screw extruder as claimed in claim 1, characterized in that: The screening mechanism comprises a screening plate (14) sliding inside a screening bin (4) and a rotating shaft (11) rotating inside a casing (7); the rotating shaft (11) is transmission-connected to an output end of a motor (8) via a transmission assembly (10); a push plate (13) is fixedly connected to one end of the screening plate (14); and an eccentric disk (12) corresponding to the push plate (13) is arranged at the top of the rotating shaft (11).

3. A feeding device for a twin-screw extruder as claimed in claim 2, characterized in that: A top plate (15) is fixedly mounted on one side of the screening bin (4), a spring (16) is fixedly mounted inside the top plate (15), and the other end of the spring (16) is fixedly connected to a side of the screening plate (14) away from the push plate (13).

4. A feeding device for a twin-screw extruder as claimed in claim 1, characterized in that: A heat insulating pad (17) is provided at the connection between the feed pipe (2) and the cooling bin (3), and cooling water is provided inside the cooling bin (3). One side of the cooling bin (3) is connected to a water inlet pipe (18), and the other side of the cooling bin (3) is connected to a water outlet pipe (19).

5. A feeding device for a twin-screw extruder as claimed in claim 2, characterized in that: The transmission assembly (10) comprises bevel gears respectively connected to the rotating shaft (11) and the output end of the motor (8), and the two bevel gears are meshedly connected.

6. A feeding device for a twin-screw extruder as claimed in claim 2, characterized in that: The screening bin (4) and the cooling bin (3) are detachably arranged, and the screening plate (14) passes through both sides of the screening bin (4).

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