Single-screw extrusion cutting device for plastic granulation

Abstract

The utility model discloses a single-screw extrusion cutting device for plastic granulation, which belongs to the field of plastic granulation and comprises a processing box, a cylindrical cavity is arranged in the processing box, a charging basket communicated with the processing box is mounted at the top of the processing box, an extrusion mechanism is arranged on the processing box, a heating coil is mounted in the processing box, and the heating coil is communicated with the cylindrical cavity. A connecting box is installed on the outer side of the processing box, a discharging groove is formed in the bottom of the connecting box, an internal material guiding pipe extending to the connecting box is installed on the processing box, a supporting strip is arranged in the processing box, and a set of cutters are arranged on the supporting strip. According to the cutter replacing device, the cutter can be rapidly replaced in the operation process of the granulator, compared with a traditional replacing mode, the shutdown time of the granulator is shortened, the cutter does not need to be disassembled and assembled manually, the production efficiency of the granulator is guaranteed, the labor amount of workers is reduced, and practicability is higher.

Description

Technical Field

[0001] The utility model relates to the field of plastic granulation, and more specifically to a single-screw extrusion and cutting device for plastic granulation. Background Art

[0002] A granulator is a molding machine that can make materials into specific shapes. It is widely used in chemical, petrochemical, pharmaceutical, food, building materials, mining, metallurgy, environmental protection, printing and dyeing, ceramics, rubber, plastics and other fields. The recycling and resource development of waste plastics is a production method that stems from a deep understanding of the environment and resources, and reduces the pollution of waste plastics to the environment and reduces the waste of resources. In the granulation production process, knives are needed to cut the plastic.

[0003] The existing single-screw extrusion granulator has the following defects when performing cutting operations for a long time: users need to replace the cutter regularly, and during the tool replacement process, the machine needs to be shut down, which seriously affects the production efficiency of the granulator and increases the workload of the staff. For this reason, we have launched a plastic granulation single-screw extrusion cutting device to solve the above problems. Utility Model Content

[0004] In view of the problems existing in the prior art, the utility model aims to provide a single-screw extrusion and cutting device for plastic granulation.

[0005] To solve the above problems, the utility model adopts the following technical solutions.

[0006] A single-screw extrusion and cutting device for plastic granulation comprises a processing box, a cylindrical cavity is provided inside the processing box, a material barrel connected to the processing box is installed on the top of the processing box, an extrusion mechanism is provided on the processing box, a heating coil is installed inside the processing box, a connecting box is installed on the outside of the processing box, a discharge groove is provided on the bottom of the connecting box, an internal material guide pipe extending to the connecting box is installed on the processing box, a support bar is provided inside the processing box, a group of cutters are provided on the support bar, and a driving mechanism and a tool changing assembly are respectively provided on the outside of the support bar.

[0007] As a further description of the above technical solution:

[0008] The extrusion mechanism includes a first motor and a spiral blade. The first motor is installed on the outside of the processing box. The output end of the first motor is fixedly connected to a rotating shaft that penetrates into the processing box through a coupling. The spiral blade is installed on the outside of the rotating shaft and is inside the cylindrical cavity.

[0009] As a further description of the above technical solution:

[0010] The driving mechanism includes a second motor, a connecting shaft and a reciprocating wheel. The second motor is installed to the inner wall of the connecting box. The output shaft of the second motor is fixedly connected to one end of the connecting shaft through a coupling. The other end of the connecting shaft penetrates into and is fixedly connected to the interior of the reciprocating wheel. The outer side of the reciprocating wheel contacts the top of the support bar.

[0011] As a further description of the above technical solution:

[0012] A spring is installed on the top of the support bar, and the top end of the spring is fixedly connected to the inner top wall of the connection box.

[0013] As a further description of the above technical solution:

[0014] The tool changing assembly includes an electric push rod and a guide box, one end of the electric push rod passes through and extends to the outside of the connecting box, the bottom of the guide box passes through and is fixedly connected to the inside of the support bar, the top of the guide box passes through and is slidably connected to the top of the connecting box, the electric push rod is installed to the outside of the support bar, and a through groove is opened on one side of the connecting box.

[0015] As a further description of the above technical solution:

[0016] A T-shaped slot is provided inside the support bar, a slider slidably connected to the inside of the T-shaped slot is installed on the top of the cutter, opposite sides of two adjacent sliders are in contact, one end of the electric push rod penetrates and extends into the inside of the T-shaped slot, and the bottom of the guide box is connected to the T-shaped slot.

[0017] As a further description of the above technical solution:

[0018] A magnet is installed inside the support bar, and the bottom of the magnet is magnetically connected to the top of the middle sliding block.

[0019] As a further description of the above technical solution:

[0020] A transfer box sleeved on the outside of the guide box is installed on the top of the connection box, and the top of the guide box is expanded.

[0021] Compared with the prior art, the advantages of the present invention are:

[0022] (1) This solution uses a support bar to support the cutter, and the cutting operation is completed during the up and down movement of the cutter. When the cutter is replaced, the new cutter can be introduced into the support bar along the guide box, and then the electric push rod is used to push it to the corresponding position, so that the cutting replacement operation can be completed quickly, which saves time and effort and is more practical.

[0023] (2) In this solution, during each replacement of the cutter, the used cutter will be discharged along the through slot, without the need for manual operation by the user, which is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the utility model;

[0025] Figure 2 It is a cross-sectional schematic diagram of the processing box and the connection box structure of the utility model;

[0026] Figure 3 It is an exploded schematic diagram of the connection box and guide box structure of the utility model;

[0027] Figure 4 It is a cross-sectional schematic diagram of the support bar and T-shaped slide groove structure of the utility model.

[0028] Description of the numbers in the figure:

[0029] 1. Processing box; 2. Material barrel; 3. Extrusion mechanism; 31. First motor; 32. Spiral blade; 4. Heating coil; 5. Connection box; 6. Material guide tube; 7. Support bar; 8. Driving mechanism; 81. Second motor; 82. Connecting shaft; 83. Reciprocating wheel; 9. Tool changing assembly; 91. Electric push rod; 92. Guide box; 10. Spring; 11. T-type slide; 12. Sliding block; 13. Discharge trough; 14. Magnet; 15. Transfer box; 16. Through slot; 17. Cutter. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention;

[0031] See also Figure 1-4 In the utility model, a plastic granulation single-screw extrusion cutting device comprises a processing box 1, a cylindrical cavity is provided inside the processing box 1, a material barrel 2 connected to the processing box 1 is installed on the top of the processing box 1, an extrusion mechanism 3 is provided on the processing box 1, a heating coil 4 is installed inside the processing box 1, a connecting box 5 is installed on the outside of the processing box 1, a discharge groove 13 is provided at the bottom of the connecting box 5, an internal material guide pipe 6 extending to the connecting box 5 is installed on the processing box 1, a support bar 7 is provided inside the processing box 1, a group of cutters 17 are provided on the support bar 7, and a driving mechanism 8 and a tool changing assembly 9 are respectively provided on the outside of the support bar 7.

[0032] Among them: the extrusion mechanism 3 includes a first motor 31 and a spiral blade 32. The first motor 31 is installed on the outside of the processing box 1. The output end of the first motor 31 is fixedly connected to a rotating shaft that penetrates into the processing box 1 through a coupling. The spiral blade 32 is installed on the outside of the rotating shaft and is inside the cylindrical cavity.

[0033] In the utility model, the user can pour the material into the material barrel 2 to guide it into the interior of the processing box 1, and then start the first motor 31 and the heating coil 4 to operate, and use the heating coil 4 to perform hot melt treatment on the plastic. Then the first motor 31 will drive the spiral blade 32 on the rotating shaft to move, extrude and convey the material, and then discharge the material along the material guide pipe 6. Then the driving mechanism 8 is used to drive the cutter 17 in the connecting box 5 to move, and the material is cut. The cut material is discharged along the discharge groove 13. After the cutter 17 has been used for a long time, it can be quickly replaced using the tool changing assembly 9.

[0034] See also Figure 1-3 , wherein: the driving mechanism 8 includes a second motor 81, a connecting shaft 82 and a reciprocating wheel 83, the second motor 81 is installed to the inner wall of the connecting box 5, the output shaft of the second motor 81 is fixedly connected to one end of the connecting shaft 82 through a coupling, the other end of the connecting shaft 82 penetrates into and is fixedly connected to the inside of the reciprocating wheel 83, and the outer side of the reciprocating wheel 83 contacts the top of the support bar 7.

[0035] A spring 10 is installed on the top of the support bar 7 , and the top end of the spring 10 is fixedly connected to the inner top wall of the connection box 5 .

[0036] In the utility model, when the cutting operation is performed, the second motor 81 is started, and the connecting shaft 82 is used to drive the reciprocating wheel 83 to move. During the rotation of the reciprocating wheel 83, when its long end is in a vertical state, the support bar 7 will be moved downward against the material, thereby driving the cutter 17 to cut the material discharged from the material guide tube 6. At this time, the spring 10 is in a stretched state. Subsequently, when the short end of the reciprocating wheel 83 is in a vertical state, the spring 10 is no longer affected by the support bar 7, thereby resetting the deformation, thereby driving the support bar 7 and the cutter 17 to reset. During the continuous movement of the reciprocating wheel 83, the cutter 17 is made to reciprocate up and down to continuously perform the cutting operation.

[0037] See also Figure 1-4 , wherein: the tool changing assembly 9 includes an electric push rod 91 and a guide box 92, one end of the electric push rod 91 passes through and extends to the outside of the connecting box 5, the bottom of the guide box 92 passes through and is fixedly connected to the inside of the support bar 7, the top of the guide box 92 passes through and is slidably connected to the top of the connecting box 5, the electric push rod 91 is installed to the outside of the support bar 7, and a through groove 16 is opened on one side of the connecting box 5.

[0038] A T-shaped slide groove 11 is opened inside the support bar 7, and a slider 12 slidably connected to the inside of the T-shaped slide groove 11 is installed on the top of the cutter 17. The opposite sides of two adjacent sliders 12 are in contact, and one end of the electric push rod 91 penetrates and extends to the inside of the T-shaped slide groove 11. The bottom of the guide box 92 is connected to the T-shaped slide groove 11.

[0039] In the present invention, when the cutter 17 needs to be replaced, the user can put the new cutter 17 into the support bar 7 along the guide box 92, so that the slider 12 on the cutter 17 is in the T-shaped slide groove 11, and then start the electric push rod 91 to push the slider 12 on the cutter 17, and then the cutter 17 will resist and push the previously used cutter 17 to complete the replacement operation of the cutter 17. It should be noted that when the cutter 17 is selected as a type in which the outer side is the cutting area, the tool change process can be completed during the cutting process. If the cutter 17 is selected as a type in which the bottom is the cutting area, the drive mechanism 8 can be briefly stopped and started again after the cutter 17 replacement operation is quickly completed.

[0040] See also Figure 1-4 , wherein: a magnet 14 is installed inside the support bar 7, and the bottom of the magnet 14 is magnetically connected to the top of the middle slider 12.

[0041] In the utility model, the magnet 14 is used to adsorb the slider 12 at the corresponding position, so as to ensure the stability of the corresponding cutter 17 and reduce the accidental movement of the cutter 17 during the cutting operation.

[0042] See also Figure 1-3 , wherein: a transfer box 15 is installed on the top of the connection box 5 and is sleeved on the outside of the guide box 92, and the top of the guide box 92 is expanded.

[0043] In the utility model, during the cutting operation, the guide box 92 will move up and down in the transfer box 15. In order to facilitate the user to insert a new cutter 17, the expansion setting at the top of the guide box 92 is used to guide the cutter 17. After the user inserts the new cutter 17 into the transfer box 15, the cutter 17 will fall along the expansion to the inside of the guide box 92, completing the cutter 17 insertion operation.

[0044] It should be noted that the various devices in this application are common devices in the market, and can be selected according to specific needs during specific use. The circuit connection relationship of each device belongs to a simple series and parallel connection circuit. There is no innovation in the circuit connection. Those skilled in the art can easily implement it. It belongs to the existing technology and will not be elaborated.

[0045] Working principle: the user can pour the material into the material barrel 2 and guide it into the interior of the processing box 1, then start the first motor 31 and the heating coil 4 to operate, use the heating coil 4 to perform heat-melting treatment on the plastic, then the first motor 31 will drive the spiral blade 32 on the rotating shaft to move, extrude and convey the material, then discharge the material along the guide pipe 6, and then cut it. When the cutting operation is performed, start the second motor 81, use the connecting shaft 82 to drive the reciprocating wheel 83 to move, and during the rotation of the reciprocating wheel 83, when its long end is in a vertical state, the support bar 7 will be pushed downward to move. The spring 10 is in a stretched state. Then, when the short end of the reciprocating wheel 83 is in a vertical state, the spring 10 is no longer affected by the support bar 7, so that the deformation is reset, thereby driving the support bar 7 and the cutter 17 to reset. During the continuous movement of the reciprocating wheel 83, the cutter 17 reciprocates up and down to continuously perform the cutting operation. When the cutter 17 needs to be replaced, the user can put the new cutter 17 into the support bar 7 along the guide box 92. The guide box 92 is used to replace the cutter 17. The expansion opening at the top is used to guide the cutter 17. After the user puts the new cutter 17 into the transfer box 15, the cutter 17 will fall into the guide box 92 along the expansion opening, completing the cutter 17 insertion operation, so that the slider 12 on the cutter 17 is in the T-shaped slide 11, and then the electric push rod 91 is started to push the slider 12 on the cutter 17, and then the cutter 17 will push the previously used cutter 17 to complete the replacement operation of the cutter 17. At the same time, the magnet 14 is used to adsorb the slider 12 at the corresponding position, so as to ensure the stability of the corresponding cutter 17 and reduce its In case of unexpected movement during operation, it should be noted that when the cutter 17 is selected as a type with the outer side being the cutting area, the cutter replacement process can be completed during the cutting process; if the cutter 17 is selected as a type with the bottom being the cutting area, the drive mechanism 8 can be briefly shut down and restarted after the cutter 17 replacement operation is quickly completed. The entire device can quickly replace the cutter 17 during the operation of the granulator. Compared with the traditional replacement method, the downtime of the granulator is reduced, and there is no need for manual disassembly and assembly of the cutter 17, thereby ensuring the production efficiency of the granulator, reducing the workload of the staff, and being more practical.

[0046] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A plastic granulation single-screw extrusion cutting device, comprising a processing box (1), wherein a cylindrical cavity is provided inside the processing box (1), characterized in that: A material barrel (2) connected to the processing box (1) is installed on the top of the processing box (1), an extrusion mechanism (3) is arranged on the processing box (1), a heating coil (4) is installed inside the processing box (1), a connecting box (5) is installed on the outside of the processing box (1), a discharge groove (13) is opened at the bottom of the connecting box (5), an internal material guide pipe (6) extending to the connecting box (5) is installed on the processing box (1), a support bar (7) is arranged inside the processing box (1), a group of cutting knives (17) are arranged on the support bar (7), and a driving mechanism (8) and a tool changing assembly (9) are respectively arranged on the outside of the support bar (7).

2. A plastic granulation single screw extrusion cutting device according to claim 1, characterized in that: The extrusion mechanism (3) comprises a first motor (31) and a spiral blade (32); the first motor (31) is mounted on the outside of the processing box (1); the output end of the first motor (31) is fixedly connected to a rotating shaft that penetrates into the interior of the processing box (1) via a coupling; the spiral blade (32) is mounted on the outside of the rotating shaft and is located inside the cylindrical cavity.

3. A plastic granulation single screw extrusion cutting device according to claim 1, characterized in that: The driving mechanism (8) comprises a second motor (81), a connecting shaft (82) and a reciprocating wheel (83); the second motor (81) is mounted on the inner wall of the connecting box (5); the output shaft of the second motor (81) is fixedly connected to one end of the connecting shaft (82) via a coupling; the other end of the connecting shaft (82) penetrates into and is fixedly connected to the interior of the reciprocating wheel (83); the outer side of the reciprocating wheel (83) contacts the top of the support bar (7).

4. A plastic granulation single screw extrusion cutting device according to claim 1, characterized in that: A spring (10) is installed on the top of the support bar (7), and the top end of the spring (10) is fixedly connected to the inner top wall of the connection box (5).

5. A plastic granulation single screw extrusion cutting device according to claim 1, characterized in that: The tool changing assembly (9) comprises an electric push rod (91) and a guide box (92), one end of the electric push rod (91) passes through and extends to the outside of the connecting box (5), the bottom of the guide box (92) passes through and is fixedly connected to the inside of the support bar (7), the top of the guide box (92) passes through and is slidably connected to the top of the connecting box (5), the electric push rod (91) is installed to the outside of the support bar (7), and a through groove (16) is opened on one side of the connecting box (5).

6. A plastic granulation single screw extrusion cutting device according to claim 5, characterized in that: A T-shaped slide groove (11) is provided inside the support bar (7), a slider (12) slidably connected to the inside of the T-shaped slide groove (11) is installed on the top of the cutter (17), and opposite sides of two adjacent sliders (12) are in contact, one end of the electric push rod (91) penetrates and extends into the inside of the T-shaped slide groove (11), and the bottom of the guide box (92) is connected to the T-shaped slide groove (11).

7. A plastic granulation single screw extrusion cutting device according to claim 1, characterized in that: A magnet (14) is installed inside the support bar (7), and the bottom of the magnet (14) is magnetically connected to the top of the middle slider (12).

8. A plastic granulation single screw extrusion cutting device according to claim 5, characterized in that: A transfer box (15) is installed on the top of the connection box (5) and is sleeved on the outside of the guide box (92). The top of the guide box (92) is flared.

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