A return device and an extrusion tablet press

Abstract

A kind of return device and extrusion tablet press belong to production equipment technical field.The device is used to solve the problem of low efficiency of waste recovery after extrusion tabletting.Return device includes main conveyor, cutting mechanism and vice conveyor.Cutting mechanism is installed on the top of main conveyor, and is provided with fixed frame, shaft, two slidable cutting disc knives and guide shell.Cutting disc knife adjusts position by two-way threaded rod, and guide shell guides the cut waste to vice conveyor.Extrusion tablet press includes screw extruder and press roller mechanism.When using, press roller presses raw material into sheet and falls to main conveyor, cutting disc knife cuts off edge waste during conveying process, and waste falls into vice conveyor through guide shell and is conveyed to crusher.The device adjusts cutting width by sliding cutting disc knife, and realizes directional conveying of waste in cooperation with guide shell, which simplifies return process and improves resource recovery efficiency.

Description

Technical Field

[0001] This utility model relates to the field of production equipment technology, and in particular to a material return device and an extrusion tablet press. Background Technology

[0002] In extrusion tablet production, EVA raw materials need to be trimmed after being pressed into sheets. The waste generated during trimming is usually recycled into a return system to reuse resources. However, existing waste disposal methods have shortcomings, such as difficulty in adjusting the cut size and inefficient subsequent collection and conveying processes. This solution addresses these issues by proposing a more direct waste recycling method that simplifies the process and improves resource utilization. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies, such as the inconvenience of adjusting the cutting size of waste materials and the lack of smoothness in the subsequent collection and conveying process, by proposing a return material device and an extrusion tablet press.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A return material device includes a main conveyor;

[0006] The cutting mechanism includes a fixed frame, a rotating shaft, two cutting disc blades, and two guide shells. The fixed frame is fixedly installed on the top of the main conveyor. The rotating shaft is rotatably connected to the inside of the fixed frame through bearings. The two cutting disc blades are slidably sleeved on the outer wall of the rotating shaft. Sliding seats are slidably connected to both sides of the top of the fixed frame. The two guide shells are respectively fixed to the side walls of the two sliding seats, and their inlet ends are located directly behind the cutting trajectory of the cutting disc blades.

[0007] The cutting disc blade rotates to remove waste material from the edge of the tablet, and the waste material is guided by the guide shell to fall to the auxiliary conveyor and then to the crusher.

[0008] In one possible design, a drive motor is mounted on one side of the mounting bracket, and the output shaft of the drive motor is coaxially fixed to the rotating shaft via a coupling.

[0009] In one possible design, a bidirectional threaded rod is also included, which is rotatably mounted on the top of the fixed frame via a bearing. A connecting seat is fixed on the top of the sliding seat, and the two connecting seats are respectively threaded onto the threaded sections on both sides of the bidirectional threaded rod.

[0010] A sliding plate is vertically slidably mounted on one side of the fixed frame, and a rotating plate is rotatably mounted on the top of the sliding plate. Multiple first-position limit blocks are fixedly mounted on both sides of the sliding plate, and multiple second-position limit blocks are fixedly mounted on both sides of the rotating plate.

[0011] In one possible design, a secondary conveyor is disposed below the main conveyor, and the outlet end of the guide shell extends directly above the feed end of the secondary conveyor.

[0012] An extrusion tablet press, used in conjunction with the aforementioned return material device, includes:

[0013] The screw extruder is mounted with support from a base frame at the bottom;

[0014] The tableting mechanism includes a mounting frame and two pressure rollers. The mounting frame is fixed below the discharge port of the screw extruder, and the two pressure rollers are rotatably mounted inside the mounting frame via bearings.

[0015] In one possible design, the main conveyor is located directly below the discharge end of the pressure roller.

[0016] In one possible design, the rotating shaft of the pressure roller is fixedly fitted with a driven gear, a motor is mounted on one side of the mounting bracket, the output shaft of the motor is fixedly fitted with a driving gear, and the driving gear meshes with one of the driven gears.

[0017] In this application, during actual use, the EVA raw material is extruded and mixed by a screw extruder and then conveyed to the tableting mechanism. The drive gear rotates after the starter motor rotates, which drives the meshing driven gear to rotate, thereby causing the two meshing driven gears and the two pressure rollers to rotate. When the raw material passes through the two pressure rollers, it will be extruded into tablets and then fall onto the main conveyor for conveying.

[0018] By starting the drive motor to drive the rotating shaft to rotate, the two cutting disc blades on the outer wall will rotate. When the raw material passes between the two cutting disc blades, the excess part at the edge will be cut off and enter the interior of the guide shell. Then it will fall into the auxiliary conveyor below for conveying, so that it will be conveyed to the crusher to be crushed and then conveyed back to the screw extruder.

[0019] The operator moves the slide plate upwards, causing the first limit block to move above the connecting seat. Then, the double-threaded rod is rotated, causing the two connecting seats to move in opposite directions, thereby adjusting the position of the guide shell and the cutting disc blade. After the connecting seat is driven to its approximate position, the slide plate is moved downwards again. Then, the double-threaded rod is rotated again, causing the connecting seat to engage with the corresponding first limit block. Finally, the rotating plate is rotated to close, so that the second limit block and the first limit block restrict the connecting seat between them, thereby preventing accidental contact and ensuring its stability during operation.

[0020] In this utility model, the return material device, through a sliding double-blade structure, can effectively and conveniently adjust the position of the cutting disc blade, enabling it to cut the material after pressing according to the actual situation.

[0021] In this utility model, the extrusion tablet press, when used in conjunction with the return material device, can directly convey the waste material at the edge into the crusher, making it convenient to feed it back into the extruder.

[0022] In this invention, the flattened sheet material can be cut during use, so that the waste material at the edges is cut off and guided to the equipment in the subsequent return process, and then put back into the extruder for secondary processing. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the main structure of a material return device and an extrusion tablet press proposed in this utility model;

[0024] Figure 2 This is a rear view structural diagram of a material return device and an extrusion tablet press proposed in this utility model;

[0025] Figure 3 This utility model Figure 1 Enlarged view of the structure of section A;

[0026] Figure 4 This utility model Figure 1 Enlarged view of the structure of section B;

[0027] Figure 5 This utility model Figure 2 Enlarged view of the structure of section C.

[0028] In the diagram: 1. Screw extruder; 2. Base frame; 3. Main conveyor; 4. Auxiliary conveyor; 5. Mounting frame; 6. Motor; 7. Driven gear; 8. Pressure roller; 9. Fixing frame; 10. Rotating plate; 11. Slide plate; 12. Second limit block; 13. First limit block; 14. Connecting seat; 15. Sliding seat; 16. Guide shell; 17. Drive motor; 18. Bidirectional threaded rod; 19. Rotating shaft; 20. Cutting disc blade. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0030] In one embodiment: Reference Figure 1-2 A return material device includes: a main conveyor 3, and a cutting mechanism fixedly installed on the top of the main conveyor 3.

[0031] refer to Figure 4-5The fixing frame 9 of the cutting mechanism is installed on the main conveyor 3. In some specific embodiments, the fixing frame 9 is an n-shaped frame. The fixing frame 9 is set across the main conveyor 3 in the width direction. The two ends of the fixing frame 9 are fixedly connected to the frame of the main conveyor 3 by bolts.

[0032] A rotating shaft 19 is installed on the lower side of the fixed frame 9 (towards the conveyor belt of the main conveyor 3). The rotating shaft 19 is rotatably connected to the fixed frame 9 through a bearing seat. Two cutting disc blades 20 are installed on the rotating shaft 19. The two cutting disc blades 20 are slidably connected to the rotating shaft 19 in the axial direction and are upper-limited connected in the circumferential direction. In some specific embodiments, the rotating shaft 19 has a limiting groove along its length, and the two cutting disc blades 20 are provided with matching limiting keys, so that when the rotating shaft 19 rotates, it can drive the two cutting disc blades 20 to rotate synchronously through the limiting groove and the limiting key, and the limiting keys of the two cutting disc blades 20 can slide axially along the limiting groove.

[0033] The top plate of the fixed frame 9 (the plate facing the conveyor belt of the main conveyor 3) has an installation opening, and a groove is provided on the inner wall of the installation opening. The cross-sectional shape of the groove can be a T-shaped groove, a dovetail groove, etc. Specifically, in this embodiment, two T-shaped grooves are provided on the two inner walls of the installation opening along the width direction of the main conveyor 3.

[0034] Two sliding seats 15 are slidably installed inside the mounting port. The two sliding seats 15 are arranged opposite each other and have the same structure. Each sliding seat 15 is provided with a T-shaped slider that is adapted to the T-shaped groove, so that the sliding seat 15 can slide back and forth along the T-shaped groove inside the mounting port.

[0035] A support seat is installed on the top of the fixed frame 9. A double-threaded rod 18 is installed on the support seat and the bearing. The double-threaded rod 18 is located above the mounting port. A connecting seat 14 is installed on the top of the sliding seat 15. A threaded sleeve is provided on the connecting seat 14 in the width direction of the main conveyor 3. The threaded sleeve is connected to the double-threaded rod 18 by threads. Therefore, when the double-threaded rod 18 is rotated, it can simultaneously drive the two oppositely arranged sliding seats 15 to move closer or further away.

[0036] Specifically, the bidirectional threaded rod 18 is a rod with a positive thread at one end and a negative thread at the other end. The sliding seat 15 on one side of the main conveyor 3 is connected to the bidirectional threaded rod 18 with a positive thread, while the sliding seat 15 on the other side of the main conveyor 3 is connected to the bidirectional threaded rod 18 with a negative thread.

[0037] In some specific embodiments, a handwheel is also installed at one end of the bidirectional threaded rod 18. The bidirectional threaded rod 18 can be easily driven to rotate by manually turning the handwheel, thereby adjusting the relative position of the two sliding seats 15.

[0038] The sliding seat 15 is connected to the cutting disc blade 20 on one side via a rotary joint, and is fixedly connected to the guide shell 16 on the other side. This allows the sliding seat 15 to reciprocate along the T-shaped groove in the mounting opening, while simultaneously driving the guide shell 16 and the cutting disc blade 20 to move synchronously. Specifically, the guide shell 16 is located behind the cutting disc blade 20 (with the conveying direction of the main conveyor 3 as the rear direction). The outlet end of the guide shell 16 extends directly above the auxiliary conveyor 4, so that the waste material formed after the cutting disc blade 20 is cut can be fed into the guide shell 16. The waste material can then be fed onto the auxiliary conveyor 4 through the guide shell 16, thus completing the return process.

[0039] The cross-sectional shape of the guide shell 16 can be one of the following: trumpet-shaped, rectangular funnel-shaped, or inclined groove-shaped.

[0040] In some specific embodiments, a protective cover (not shown in the figure) is installed on the sliding seat 15. The protective cover is located on the left and right sides of the fixed frame 9, with the side closer to the screw extruder 1 being the right side and the opposite side being the left side. By setting the protective cover to partially surround the cutting disc blade 20, the lower part of the cutting disc blade 20 can be exposed to cut the material, while most of it is inside the protective cover.

[0041] When the main conveyor 3 conveys the tableted material, after passing through the cutting disc blade, the waste material on the side will be cut off and enter the guide shell 16, so that it falls onto the auxiliary conveyor 4 below, and is then conveyed back to the crusher for crushing before being put back into the tablet press to realize the return process.

[0042] One end of the rotating shaft 19 is connected to the drive motor 17. Specifically, the drive motor 17 is fixed to the side wall of the fixed frame 9 by an L-shaped mounting plate, and the output shaft of the drive motor 17 is connected to the rotating shaft 19 by a coupling.

[0043] The slide plate 11 is vertically slidably mounted above the fixed frame 9 and located on one side of the bidirectional threaded rod 18. The rotating plate 10 is rotatably mounted on the top of the slide plate 11. Multiple first-position limit blocks 13 are fixedly mounted at both ends of the side wall of the slide plate 11. Multiple second-position limit blocks 12 are fixedly mounted on both sides of the side wall of the rotating plate 10. Each second-position limit block 12 has a corresponding first-position limit block 13. There is a gap between the corresponding second-position limit block 12 and the first-position limit block 13. This gap is adapted to the thickness of the connecting seat 14.

[0044] Specifically, when adjusting the cutting width, the operator first lifts the slide plate 11, causing the first limiting block 13 to disengage from the connecting seat 14. Rotating the bidirectional threaded rod 18 moves the two connecting seats 14 towards each other. After adjusting the spacing of the cutting disc blades 20 to the target value, the slide plate 11 is lowered so that the first limiting block 13 is positioned on one side of the connecting seat 14. Then, the bidirectional threaded rod 18 is rotated until it aligns with the corresponding first limiting block 14. The rotating plate 10 is then closed, causing the second limiting block 12 to form a secondary limit. At this point, the connecting seat 14 is positioned between the first limiting block 14 and the second limiting block 12, thus completing the repositioning of the connecting seat 14.

[0045] This application can be used in the field of production equipment, or in other fields applicable to this application.

[0046] In another embodiment: Reference Figure 1 , Figure 3 An extrusion tablet press, used in conjunction with a return material device as described in the above embodiment, is applied in the field of production equipment. The screw extruder 1 is supported above the main conveyor 3 by a base frame 2, with its discharge port facing the tablet pressing mechanism. The mounting frame 5 is welded from channel steel. Two pressure rollers 8 are mounted inside the mounting frame 5 via bearings. A motor 6 is connected to a drive gear via a reducer. The drive gear meshes with one of the driven gears 7, and the driven gear 7 is keyed to the shaft of the pressure roller 8. The two driven gears 7 mesh with each other to form a transmission pair. When the motor 6 is energized, it can drive the output shaft of the reducer to rotate. The output shaft of the reducer can drive the drive gear to rotate, which in turn can drive one of the driven gears 7 to rotate. One of the driven gears 7 can then drive the other driven gear 7 to rotate, thus achieving reverse rotation of the two pressure rollers 8. The pressure roller 8 on the left rotates clockwise, and the pressure roller 8 on the right rotates counterclockwise. The side closer to the screw extruder 1 is the right side.

[0047] In some embodiments, the driving gear and the two driven gears 7 are both mounted inside a protective cover (not shown in the figure).

[0048] During operation, EVA raw material is extruded by screw extruder 1 and falls between two pressure rollers 8 to be squeezed into sheet form. The main conveyor 3 transports the sheet material to the cutting mechanism. The cutting disc blade 20 rotates under the drive of the drive motor 17 to cut off the waste material at the edge. The waste material falls into the auxiliary conveyor 4 through the guide shell 16 and is transported to the crusher for processing before being fed back into the screw extruder 1 for recycling.

[0049] However, as is well known to those skilled in the art, the working principles and wiring methods of conveyors, motors and drive motors are conventional methods or common knowledge, and will not be elaborated here. Those skilled in the art can make any selections according to their needs or convenience.

[0050] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0051] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A return material device, characterized in that, include: Main conveyor (3); The cutting mechanism includes a fixed frame (9), a rotating shaft (19), two cutting disc blades (20) and two guide shells (16). The fixed frame (9) is fixedly installed on the top of the main conveyor (3). The rotating shaft (19) is rotatably connected to the inside of the fixed frame (9) through a bearing. The two cutting disc blades (20) are slidably sleeved on the outer wall of the rotating shaft (19). Sliding seats (15) are slidably connected to both sides of the top of the fixed frame (9). The two guide shells (16) are respectively fixed to the side walls of the two sliding seats (15) and their inlet ends are located directly behind the cutting trajectory of the cutting disc blades (20). Among them, the cutting disc blade (20) rotates to cut off the waste material at the edge of the tablet, and the waste material is guided by the guide shell (16) to fall to the auxiliary conveyor (4) and then transported to the crusher.

2. A device according to claim 1, c h a r a c t e r i s e d in that A drive motor (17) is installed on one side of the fixed frame (9), and the output shaft of the drive motor (17) is fixed coaxially with the rotating shaft (19) through a coupling.

3. The device of claim 1, wherein, It also includes a bidirectional threaded rod (18), which is rotatably mounted on the top of the fixed frame (9) via a bearing, and a connecting seat (14) is fixed on the top of the sliding seat (15). The two connecting seats (14) are respectively threaded onto the threaded sections on both sides of the bidirectional threaded rod (18). A sliding plate (11) is vertically slidably mounted on one side of the fixed frame (9). A rotating plate (10) is rotatably mounted on the top of the sliding plate (11). Multiple first-position limit blocks (13) are fixedly mounted on both sides of the sliding plate (11). Multiple second-position limit blocks (12) are fixedly mounted on both sides of the rotating plate (10).

4. The device of claim 1, wherein, A secondary conveyor (4) is provided below the main conveyor (3), and the outlet end of the guide shell (16) extends directly above the feed end of the secondary conveyor (4).

5. An extrusion press for use with a return device as claimed in any one of claims 1 to 4, characterised in that, include: The screw extruder (1) is supported and mounted by a base frame (2) located at the bottom; The tableting mechanism includes a mounting frame (5) and two pressure rollers (8). The mounting frame (5) is fixed below the discharge port of the screw extruder (1), and the two pressure rollers (8) are rotatably mounted inside the mounting frame (5) via bearings.

6. The extrusion press according to claim 5, characterized in that Its main conveyor (3) is located directly below the discharge end of the pressure roller (8).

7. The extrusion press according to claim 6, characterized in that The rotating shaft of the pressure roller (8) is fixedly fitted with a driven gear (7), and a motor (6) is installed on one side of the mounting frame (5). The output shaft of the motor (6) is fixedly fitted with a driving gear, and the driving gear meshes with one of the driven gears (7).

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