Feeding device of extruder

Abstract

The utility model discloses a feeding device of an extruder, which comprises a blanking pipe communicated with a feeding hole of a double-screw extruder, the top surface of the blanking pipe is communicated with a crushing box, two crushing rollers in mirror symmetry are horizontally and rotatably connected in the crushing box, and two grinding rollers in mirror symmetry are arranged below the two crushing rollers. The two grinding rollers are horizontally and rotationally connected to the inner wall of the crushing box, the bottom faces of the grinding rollers are attached to a grinding plate with the top face penetrating through a plurality of through holes, the grinding plate is fixed in the crushing box in a suspended mode, a machine box is arranged outside the crushing box, and a driving part is arranged in the machine box. The crushing box is communicated with the feed port of the double-screw extruder, the crushing roller and the grinding roller are rotationally connected in the crushing box, and the grinding plate with the top surface penetrating through the through holes is fixed below the grinding roller in a suspended manner, so that large-particle plastic is crushed, the size difference of the plastic is reduced, and the crushing efficiency is improved. The situation that large-particle plastic cannot be rapidly melted, and the coating effect of a workpiece surface protection layer is affected is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of coating equipment, in particular to a feeding device of an extruder. Background Art

[0002] Twin-screw extruders are developed on the basis of single-screw extruders. They have been widely used in the molding of extruded products due to their good feeding performance, mixing and plasticizing performance, exhaust performance, extrusion stability, etc. Twin-screw extruders are usually used to extrude molten plastics and coat them on the surface of some workpieces, so that a protective layer is formed on the surface of the workpiece.

[0003] However, due to the uneven size of the plastic particles put into the twin-screw extruder, the larger the volume of the plastic particles, the slower the melting speed, and vice versa. Some large plastic particles are easily squeezed out of the equipment in an unmelted state, which not only easily affects the coating effect of the protective layer on the surface of the workpiece, but also easily causes the screw in the equipment to get stuck. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a feeding device for an extruder.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a feeding device of an extruder, comprising a feeding pipe connected to the feeding port of a twin-screw extruder, the top surface of the feeding pipe is connected to a crushing box, the bottom surface of the crushing box is vertically fixed with a supporting leg fixedly connected to the twin-screw extruder, the top surface of the crushing box is connected to a hopper, two mirror-symmetrical crushing rollers are horizontally rotatably connected in the crushing box, two mirror-symmetrical grinding rollers are arranged below the two crushing rollers, both of the two grinding rollers are horizontally rotatably connected to the inner wall of the crushing box, the bottom surface of the grinding roller fits against a grinding plate with multiple through holes passing through the top surface, the grinding plate is suspended and fixed in the crushing box, a chassis is arranged outside the crushing box, a driving member is arranged inside the chassis, and a driving motor transmission-connected to the driving member is horizontally fixed outside the chassis.

[0006] As a further description of the above technical solution: the top surface of the crushing box passes through the feeding port, the feeding port is located directly below the hopper and is connected thereto, and the bottom surface of the crushing box passes through the discharge port, the discharge port is located directly above the discharge pipe and is connected thereto.

[0007] As a further description of the above technical solution: two mirror-symmetrical material guide blocks are provided below the grinding plate, the two material guide blocks are fixedly connected to the crushing box, and the two material guide blocks are respectively distributed on both sides of the discharge port.

[0008] As a further description of the above technical solution: the driving member includes a first rotating shaft rotatably connected to the chassis, a first rotating shaft is concentrically fixed at both ends of each crushing roller, each of the first rotating shafts is rotatably connected to the crushing box, a first gear is fixedly sleeved on the outer edges of the two first rotating shafts, the two first gears are meshed with each other, and the driving motor is drivingly connected to one of the first rotating shafts.

[0009] As a further description of the above technical solution: a second rotating shaft is concentrically fixed at both ends of each grinding roller, and each of the second rotating shafts is rotatably connected in the crushing box. The second rotating shaft on one side of the grinding roller rotates through the crushing box and extends to be rotatably connected in the chassis. Two second gears meshing with each other are provided in the chassis, and the two second gears are respectively fixedly sleeved on the outer edges of the two second rotating shafts, and the second rotating shaft and the first rotating shaft are connected to each other through a transmission member.

[0010] As a further description of the above technical solution: the transmission member includes a first pulley fixedly sleeved on the outer edge of one of the first rotating shafts, a second pulley fixedly sleeved on the outer edge of one of the second rotating shafts, and a same belt is commonly sleeved between the first pulley and the second pulley.

[0011] The utility model has the following beneficial effects:

[0012] Compared with the prior art, the feeding device for the extruder is connected to a crushing box at the feeding port of the twin-screw extruder, and two mirror-symmetrical crushing rollers are rotatably connected in the crushing box, two grinding rollers that are also rotatably connected in the crushing box are arranged below the crushing rollers, and a grinding plate with a plurality of through holes passing through the top surface is suspended and fixed below the grinding rollers, which has the effect of crushing large-particle plastic particles, making the volume of each plastic particle more uniform, reducing the volume difference of plastic particles, and preventing large-particle plastic from being unable to be melted quickly, thereby affecting the coating effect of the protective layer on the surface of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a three-dimensional diagram of the overall structure of a feeding device of an extruder proposed by the utility model;

[0014] Figure 2 It is a side sectional view of the overall structure of a feeding device of an extruder proposed by the utility model;

[0015] Figure 3 The utility model is a side sectional view of the internal structure of a chassis of a feeding device of an extruder.

[0016] Legend:

[0017] 1. Hopper; 2. Crushing box; 3. Support legs; 4. Feeding pipe; 5. Chassis; 6. Driving motor; 7. Feeding port; 8. Guide block; 9. Grinding plate; 10. Crushing roller; 11. First rotating shaft; 12. Feeding port; 13. Grinding roller; 14. Second rotating shaft; 15. First gear; 16. First pulley; 17. Belt; 18. Second pulley; 19. Second gear. DETAILED DESCRIPTION

[0018] 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.

[0019] Reference Figures 1 to 3 The utility model provides a feeding device for an extruder: comprising a feeding tube 4 connected to a feeding port of a twin-screw extruder, the top surface of the feeding tube 4 is connected to a crushing box 2, the bottom surface of the crushing box 2 penetrates a feeding port 7, the feeding port 7 is located directly above the feeding tube 4 and is connected thereto, the bottom surface of the crushing box 2 is vertically fixed with a supporting leg 3 fixedly connected to the twin-screw extruder, the top surface of the crushing box 2 is connected to a hopper 1, the top surface of the crushing box 2 penetrates a feeding port 12, the feeding port 12 is located directly below the hopper 1 and is connected thereto, and two mirror-symmetrical crushing rollers 10 are horizontally rotatably connected in the crushing box 2 , two mirror-symmetrical grinding rollers 13 are arranged below the two crushing rollers 10, and the two grinding rollers 13 are horizontally rotatably connected to the inner wall of the crushing box 2, the bottom surface of the grinding roller 13 fits the grinding plate 9 with multiple through holes on the top surface, and the grinding plate 9 is suspended and fixed in the crushing box 2, and two mirror-symmetrical material guide blocks 8 are arranged below the grinding plate 9, and the two material guide blocks 8 are fixedly connected to the crushing box 2, and the two material guide blocks 8 are respectively distributed on both sides of the discharge port 7, and a chassis 5 is arranged outside the crushing box 2, and a driving member is arranged inside the chassis 5, and a driving motor 6 connected to the driving member is horizontally fixed outside the chassis 5;

[0020] The driving member includes a first rotating shaft 11 rotatably connected to the chassis 5, a first rotating shaft 11 is concentrically fixed at both ends of each crushing roller 10, each first rotating shaft 11 is rotatably connected to the crushing box 2, the outer edges of the two first rotating shafts 11 are each fixedly sleeved with a first gear 15, the two first gears 15 are meshed with each other, the driving motor 6 is transmission-connected to one of the first rotating shafts 11, a second rotating shaft 14 is concentrically fixed at both ends of each grinding roller 13, each second rotating shaft 14 is rotatably connected to the crushing box 2, and the second rotating shaft on one side of the grinding roller 13 14 rotates through the crushing box 2 and extends to be rotatably connected in the chassis 5. Two second gears 19 meshing with each other are provided in the chassis 5. The two second gears 19 are respectively fixedly sleeved on the outer edges of the two second rotating shafts 14. The second rotating shaft 14 and the first rotating shaft 11 are connected to each other through a transmission member. The transmission member includes a first pulley 16 fixedly sleeved on the outer edge of one of the first rotating shafts 11, a second pulley 18 is fixedly sleeved on the outer edge of one of the second rotating shafts 14, and the first pulley 16 and the second pulley 18 are commonly sleeved with the same belt 17.

[0021] A crushing box 2 is connected at the feed port of the twin-screw extruder, and two mirror-symmetrical crushing rollers 10 are rotatably connected in the crushing box 2. Two grinding rollers 13 that are also rotatably connected in the crushing box 2 are arranged below the crushing rollers 10. A grinding plate 9 with a plurality of through holes on the top surface is suspended and fixed below the grinding rollers 13. Large plastic particles are crushed, so that the volume of each plastic particle is more uniform, the volume difference of the plastic particles is reduced, and the large plastic particles cannot be melted quickly, which affects the coating effect of the protective layer on the surface of the workpiece.

[0022] Working principle: When in use, the driving motor 6 drives one of the first rotating shafts 11 to rotate, the first rotating shaft 11 drives the crushing roller 10 to rotate, the other crushing roller 10 rotates synchronously in the opposite direction through the mutually meshing first gears 15, the first rotating shaft 11 drives the belt 17 to rotate through the first pulley 16, the belt 17 drives the second pulley 18 to rotate, the second pulley 18 drives the two grinding rollers 13 to rotate synchronously on the grinding plate 9 through two mutually meshing second gears 19 and the second rotating shaft 14, the two grinding rollers 13 rotate in opposite directions, and then the plastic particles to be melted are passed through the hopper 1 The plastic is put into the crushing box 2. After entering the crushing box 2, the crushing roller 10 will first perform preliminary crushing on the plastic to initially reduce the volume of the plastic. The reduced plastic will fall on the grinding plate 9. Particles with a volume smaller than the through-hole diameter on the grinding plate 9 will pass through the grinding plate 9 and fall into the twin-screw extruder for heating and melting. The molten plastic will be extruded and coated on the surface of the workpiece, while plastics with a volume larger than the through-hole diameter on the grinding plate 9 will remain on the grinding plate 9. The grinding roller 13 will grind the plastic remaining on the grinding plate 9 to further reduce the volume of the plastic until it can pass through the through-hole on the grinding plate 9.

[0023] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A feeding device for an extruder, comprising a feed pipe (4) connected to a feed port of a twin-screw extruder, the top surface of the feed pipe (4) being connected to a crushing box (2), the bottom surface of the crushing box (2) being vertically fixed with a support leg (3) fixedly connected to the twin-screw extruder, characterized in that: The top surface of the crushing box (2) is connected to the hopper (1), and two mirror-symmetrical crushing rollers (10) are horizontally rotatably connected inside the crushing box (2). Two mirror-symmetrical grinding rollers (13) are arranged below the two crushing rollers (10). The two grinding rollers (13) are both horizontally rotatably connected to the inner wall of the crushing box (2). The bottom surface of the grinding roller (13) fits the grinding plate (9) with multiple through holes passing through the top surface. The grinding plate (9) is suspended and fixed in the crushing box (2). A chassis (5) is arranged outside the crushing box (2), and a driving member is arranged inside the chassis (5). A driving motor (6) connected to the driving member is horizontally fixed outside the chassis (5).

2. A feeding device for an extruder according to claim 1, characterized in that: The top surface of the crushing box (2) passes through a feeding port (12), and the feeding port (12) is located directly below the hopper (1) and is connected thereto. The bottom surface of the crushing box (2) passes through a discharge port (7), and the discharge port (7) is located directly above the discharge pipe (4) and is connected thereto.

3. A feeding device for an extruder according to claim 2, characterized in that: Two mirror-symmetrical guide blocks (8) are arranged below the grinding plate (9), the two guide blocks (8) are fixedly connected to the crushing box (2), and the two guide blocks (8) are respectively distributed on both sides of the discharge port (7).

4. A feeding device for an extruder according to claim 1, characterized in that: The driving member comprises a first rotating shaft (11) rotatably connected in the chassis (5), a first rotating shaft (11) is concentrically fixed at both ends of each crushing roller (10), each of the first rotating shafts (11) is rotatably connected to the crushing box (2), a first gear (15) is fixedly sleeved on the outer edge of each of the two first rotating shafts (11), the two first gears (15) are meshed with each other, and the driving motor (6) is drivingly connected to one of the first rotating shafts (11).

5. A feeding device for an extruder according to claim 4, characterized in that: A second rotating shaft (14) is concentrically fixed at both ends of each grinding roller (13), and each second rotating shaft (14) is rotatably connected in the crushing box (2). The second rotating shaft (14) on one side of the grinding roller (13) rotates through the crushing box (2) and extends to be rotatably connected in the chassis (5). Two second gears (19) meshing with each other are provided in the chassis (5). The two second gears (19) are respectively fixedly sleeved on the outer edges of the two second rotating shafts (14), and the second rotating shaft (14) and the first rotating shaft (11) are mutually connected through a transmission member.

6. A feeding device for an extruder according to claim 5, characterized in that: The transmission member comprises a first pulley (16) fixedly sleeved on the outer edge of one of the first rotating shafts (11), a second pulley (18) fixedly sleeved on the outer edge of one of the second rotating shafts (14), and a same belt (17) is sleeved between the first pulley (16) and the second pulley (18).

Images