Plastic melt extrusion regeneration granulation equipment

Abstract

The invention belongs to the technical field of plastic processing, and discloses plastic melt extrusion regeneration granulation equipment which comprises a plastic extruder, a rotating cutter granulation mechanism and a compensation mechanism, the rotating knife granulation mechanism is arranged on the plastic extruder, and the compensation mechanism is arranged on the rotating knife granulation mechanism; the rotating knife granulation mechanism comprises a mounting frame, the mounting frame is mounted at the discharging end of the plastic extruder, a motor is mounted above the mounting frame, the output end of the motor is connected with a rotating shaft, the other end of the rotating shaft is connected with a cross shaft, the cross shaft is movably sleeved with an inner cross disc, and the inner cross disc is connected with a rotating shaft. And the outer part of the inner cross plate fixedly communicates with four communicating blocks which are arranged in a surrounding manner. By means of the design, the situation that the abutting force of the cutter on the plastic extruder die head is too large due to the fact that the elastic force of the spring telescopic rod is too large in the initial state can be avoided, the cutter is prevented from being abraded too fast in the initial state, and then the service life of the cutter is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of plastic processing, in particular to a plastic melt extrusion regeneration granulation device. Background Art

[0002] When the plastic melt extrusion recycling granulation equipment is in use, the cutter will abut against the mold to perform rotary granulation. However, the long-term operation of the cutter will cause the cutter to wear, resulting in a gap between the cutter and the mold, which will reduce the quality of plastic granulation. The current solution is to use the elastic recovery effect of the spring to compensate for the gap caused by the wear of the cutter. However, the elastic force of the spring will increase with the degree of compression, which means that the pressure on the cutter in the initial stage is too large, resulting in increased friction between the cutter and the mold, which leads to faster wear of the cutter in the initial stage, thereby reducing the service life of the cutter and shortening the replacement cycle of the cutter.

[0003] Therefore, a plastic melt extrusion regeneration granulation equipment is proposed to solve the above problems. Summary of the Invention

[0004] In order to solve the problems raised in the above background technology, the present invention provides a plastic melt extrusion regeneration granulation equipment.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a plastic melt extrusion regeneration granulation device, comprising a plastic extruder, a rotary knife granulation mechanism and a compensation mechanism; The rotary knife granulation mechanism is arranged on the plastic extruder, and the compensation mechanism is arranged on the rotary knife granulation mechanism; The rotary knife granulating mechanism includes a mounting frame, which is mounted on the discharge end of the plastic extruder, a motor is mounted above the mounting frame, the output end of the motor is connected to a rotating shaft, the other end of the rotating shaft is connected to a cross shaft, the outer movable sleeve of the cross shaft is provided with an inner cross disk, the outer side of the inner cross disk is fixedly connected to four surrounding connecting blocks, the other end of the connecting block is fixedly connected to a connecting box, the other side of the connecting box is connected to a cutter abutting on the die head of the plastic extruder, one side of the inner cross disk is fixedly connected to a movable sleeve, and the outer rotating sleeve of the movable sleeve is provided with a fixed sleeve; The compensation mechanism includes a bracket, which is fixedly mounted on a mounting frame, a spring telescopic rod hinged on the bracket, an output end of the spring telescopic rod hinged to a movable arm movably mounted on the bracket, a movable slot is provided in the movable arm, a push rod is hinged above the fixed sleeve, and an internal fixed sleeve at the other end of the push rod is provided with a circular shaft that moves in the movable slot.

[0006] Preferably, both sides of the fixed sleeve are fixedly connected with a sliding frame, and the sliding sleeve of the sliding frame is arranged on the mounting frame.

[0007] Preferably, the connection box is provided with a group of liquid outlet holes facing the cutter, the outside of the movable sleeve is provided with a group of through holes, the outer movable sleeve of the movable sleeve is provided with a sealing sleeve, and the interior of the sealing sleeve is communicated with the through holes.

[0008] Preferably, the external fixed sleeve of the rotating shaft is provided with a rotating arm, and a stop wheel is movably mounted on the rotating arm.

[0009] Preferably, it also includes a cooling mechanism, which is arranged on the rotary knife granulating mechanism. The cooling mechanism includes a liquid cylinder, which is installed on a mounting frame. A piston rod is provided inside the liquid cylinder, and a tension spring is provided outside the piston rod. One end of the tension spring is connected to the inner wall of the liquid cylinder, and the other end of the tension spring is connected to the piston rod. The top of the piston rod is connected to a back plate.

[0010] Preferably, one side of the fluid cylinder is communicated with a telescopic tube that can be laterally telescopic, the other end of the telescopic tube can be communicated with a sealing sleeve, and a one-way flap 2 is provided in the telescopic tube.

[0011] Preferably, the mounting frame is connected to a water tank, and a partition net is installed on the water tank.

[0012] Preferably, a liquid inlet pipe is connected between the water tank and the liquid cylinder, and a one-way valve is provided in the liquid inlet pipe.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a spring telescopic rod and a movable arm. During the rotation of the cutter, the spring telescopic rod in a compressed state will push the movable arm to rotate along the axis movably mounted with the bracket due to the restoring effect of the elastic force, and push the abutting rod and the fixed sleeve through the circular shaft, and apply an abutting force to the cutter through the fixed sleeve to avoid a gap between the cutter and the die head. When the compression of the spring telescopic rod is at its maximum value, since the force distance of the spring telescopic rod on the movable arm is short and the force distance of the circular shaft on the movable arm is long, the abutting force of the cutter on the die head of the plastic extruder is much smaller than the elastic force of the spring telescopic rod at this time. This design can avoid the excessive abutting force of the cutter on the die head of the plastic extruder due to the excessive elastic force of the spring telescopic rod in the initial state, avoid the cutter from wearing too quickly at the initial stage, and thus extend the service life of the cutter.

[0014] The present invention provides a movable groove and a round shaft. As the cutter gradually wears, the spring telescopic rod will gradually extend. As the spring telescopic rod gradually extends, the elastic force of the spring telescopic rod will gradually decrease, and the movable arm will gradually rotate. When the movable arm rotates, the round shaft will move up in the movable groove, and at the same time, the torque distance of the round shaft will gradually shorten, so that the influence of the action force of the spring telescopic rod will gradually increase, and the elastic force of the spring telescopic rod will gradually decrease, and the torque distance of the round shaft will gradually decrease, thereby avoiding the problem of insufficient contact force between the spring telescopic rod and the die head of the plastic extruder after the elastic force of the spring telescopic rod decreases, and the contact force between the die head of the plastic extruder will not change significantly with the change of the elastic force of the spring telescopic rod, thereby ensuring that the contact force between the die head of the plastic extruder is within a sufficiently normal range.

[0015] The present invention provides a liquid cylinder and a telescopic tube. As the rotating shaft rotates, the rotating arm is driven to rotate together. Due to the rotation of the rotating arm, the abutment wheel can abut and push the abutment plate and the piston rod to descend, the tension spring is stretched, and due to the descending of the piston rod, the one-way flap 2 is opened. The cooling water in the liquid cylinder can be transported to the sealing sleeve through the telescopic tube, and enter the movable sleeve through the through hole, and then enter the inner cross disk, the connecting block and the connecting box, and finally sprayed onto the cutter through the liquid outlet hole, so as to cool the cutter, reduce the wear rate of the cutter, and further extend the service life of the cutter.

[0016] The present invention provides a water tank and a liquid inlet pipe, so that the water sprayed on the cutter will flow down into the water tank. When the impact wheel is separated from the impact plate, the elastic recovery effect of the tension spring can drive the piston rod to rise and open the one-way valve. The cooling water in the water tank is pumped into the liquid cylinder through the liquid inlet pipe, forming a circulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a structural schematic diagram of the mounting frame of the present invention; Figure 3 It is a schematic cross-sectional view of the present invention; Figure 4 for Figure 3 Schematic diagram of the local enlarged structure at A in the middle; Figure 5 This is a schematic structural diagram of the connection box of the present invention; Figure 6 for Figure 5 Schematic diagram of the local enlarged structure at B in the middle; Figure 7 Schematic diagram of the cross-sectional structure of the sealing sleeve of the present invention; Figure 8 for Figure 7 Schematic diagram of the local enlarged structure at C in the middle; Figure 9It is a front cross-sectional structural schematic diagram of a fluid cylinder of the present invention; Figure 10 It is a side cross-sectional structural schematic diagram of a fluid cylinder of the present invention.

[0018] In the figure: 1. plastic extruder; 2. rotary knife granulation mechanism; 21. mounting frame; 22. motor; 23. rotating shaft; 24. cross shaft; 25. inner cross disk; 26. connecting block; 27. connecting box; 28. cutter; 29. ​​liquid outlet; 210. movable sleeve; 211. fixed sleeve; 212. through hole; 213. sealing sleeve; 214. rotating arm; 215. push wheel; 216. sliding frame; 3. compensation mechanism; 31. bracket; 32. spring telescopic rod; 33. movable arm; 34. movable groove; 35. push rod; 36. circular shaft; 4. cooling mechanism; 41. liquid cylinder; 42. piston rod; 43. tension spring; 44. liquid inlet pipe; 45. one-way valve 1; 46. telescopic pipe; 47. one-way valve 2; 48. water tank; 49. separation net; 410. push plate. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] like Figures 1 to 10 As shown, the present invention provides a plastic melt extrusion regeneration granulation device, comprising a plastic extruder 1, a rotary knife granulation mechanism 2 and a compensation mechanism 3; The rotary knife granulating mechanism 2 is arranged on the plastic extruder 1, and the compensation mechanism 3 is arranged on the rotary knife granulating mechanism 2; The rotary cutter granulation mechanism 2 includes a mounting frame 21, which is mounted on the discharge end of the plastic extruder 1. A motor 22 is mounted above the mounting frame 21. The output end of the motor 22 is connected to a rotating shaft 23. The other end of the rotating shaft 23 is connected to a cross shaft 24. The outer movable sleeve of the cross shaft 24 is provided with an inner cross disk 25. The outer portion of the inner cross disk 25 is fixedly connected to four surrounding connecting blocks 26. The other end of the connecting block 26 is fixedly connected to a connecting box 27. The other side of the connecting box 27 is connected to a cutter 28 abutting against the die head of the plastic extruder 1. One side of the inner cross disk 25 is fixedly connected to a movable sleeve 210. The outer rotating sleeve of the movable sleeve 210 is provided with a fixed sleeve 211. The compensation mechanism 3 includes a bracket 31, which is fixedly mounted on the mounting frame 21. A spring telescopic rod 32 is hinged on the bracket 31. The output end of the spring telescopic rod 32 is hinged to a movable arm 33 movably mounted on the bracket 31. A movable slot 34 is provided in the movable arm 33. A push rod 35 is hinged above the fixed sleeve 211. The internal fixed sleeve at the other end of the push rod 35 is provided with a circular shaft 36 that moves in the movable slot 34.

[0021] The above scheme is adopted: during the rotation of the cutter 28, the spring telescopic rod 32 in a compressed state will push the movable arm 33 to rotate along the axis movably mounted with the bracket 31 due to the restoring effect of the elastic force, and push the abutting rod 35 and the fixed sleeve 211 through the circular shaft 36, and apply abutting force to the cutter 28 through the fixed sleeve 211 to avoid a gap between the cutter 28 and the die head. When the compression of the spring telescopic rod 32 is at its maximum value, since the force distance of the spring telescopic rod 32 on the movable arm 33 is short and the force distance of the circular shaft 36 on the movable arm 33 is long, the abutting force of the cutter 28 on the die head of the plastic extruder 1 is much smaller than the elastic force of the spring telescopic rod 32 at this time, thereby avoiding the excessive abutting force of the cutter 28 on the die head of the plastic extruder 1 caused by the excessive elastic force of the spring telescopic rod 32 in the initial state.

[0022] like Figure 5 and Figure 7 As shown, both sides of the fixed sleeve 211 are fixedly connected with a sliding frame 216 , and the sliding sleeves of the sliding frame 216 are arranged on the mounting frame 21 .

[0023] With the above solution, due to the design of the sliding frame 216 , the fixing sleeve 211 can be limited and the fixing sleeve 211 can be made to slide along the mounting frame 21 .

[0024] like Figures 3 to 9 As shown, the connection box 27 is provided with a group of liquid outlet holes 29 facing the cutter 28, the outside of the movable sleeve 210 is provided with a group of through holes 212, the outer movable sleeve of the movable sleeve 210 is provided with a sealing sleeve 213, and the interior of the sealing sleeve 213 is connected to the through holes 212.

[0025] Adopting the above scheme: when the cooling water is delivered to the sealing sleeve 213, it can enter the movable sleeve 210 through the through hole 212, and then enter the inner cross plate 25, the connecting block 26 and the connecting box 27, and finally spray onto the cutter 28 through the liquid outlet 29, thereby cooling the cutter 28 and reducing the wear rate of the cutter 28.

[0026] like Figure 9 and Figure 10 As shown, the outer fixed sleeve of the rotating shaft 23 is provided with a rotating arm 214, and a stop wheel 215 is movably mounted on the rotating arm 214.

[0027] With the above solution, the rotation of the rotating shaft 23 can drive the rotating arm 214 to rotate together, and the rotation of the rotating arm 214 can drive the abutting wheel 215 to abut against the abutting plate 410.

[0028] like Figure 9 and Figure 10 As shown, it also includes a cooling mechanism 4, which is arranged on the rotary knife granulating mechanism 2. The cooling mechanism 4 includes a liquid cylinder 41, which is installed on the mounting frame 21. The liquid cylinder 41 is provided with a piston rod 42, and the outside of the piston rod 42 is provided with a tension spring 43. One end of the tension spring 43 is connected to the inner wall of the liquid cylinder 41, and the other end of the tension spring 43 is connected to the piston rod 42. The top of the piston rod 42 is connected to a back plate 410.

[0029] Adopt the above scheme: when the butt plate 410 and the piston rod 42 descend, the tension spring 43 is stretched. Due to the decline of the piston rod 42, the one-way flap 47 is opened, and the cooling water in the liquid cylinder 41 can be delivered to the sealing sleeve 213 through the telescopic tube 46.

[0030] like Figure 9 and Figure 10 Shown, one side of the fluid cylinder 41 is communicated with a telescopic tube 46 that can be laterally telescopic, and the other end of the telescopic tube 46 can be communicated with the sealing sleeve 213, and a one-way flap 47 is provided in the telescopic tube 46.

[0031] Adopt such scheme: due to the design of telescopic tube 46, telescopic tube 46 can be extended laterally according to the movement of sealing sleeve 213, guarantee the connectivity of sealing sleeve 213 and fluid cylinder 41.

[0032] like Figure 9 and Figure 10 As shown, a water tank 48 is connected to the mounting frame 21 , and a partition net 49 is installed on the water tank 48 .

[0033] With the above solution, due to the design of the water tank 48 and the separation net 49, the water sprayed on the cutter 28 will flow down into the water tank 48, and the separation net 49 is used to block the entry of plastic particles.

[0034] like Figure 9 and Figure 10 As shown, a liquid inlet pipe 44 is connected between the water tank 48 and the liquid cylinder 41, and a one-way valve 45 is provided in the liquid inlet pipe 44.

[0035] Adopting the above scheme: when the wheel 215 is separated from the plate 410, due to the elastic recovery effect of the tension spring 43, the piston rod 42 can be driven to rise, and the one-way valve 45 can be opened, and the cooling water in the water tank 48 is pumped into the liquid cylinder 41 through the liquid inlet pipe 44 to form a circulation.

[0036] The working principle and use process of the present invention: When in use, the plastic extruder 1 will extrude plastic material through the die head, and at the same time, the motor 22 will run, which can drive the rotating shaft 23, the cross shaft 24 and the inner cross disk 25 to rotate. As the inner cross disk 25 rotates, the movable sleeve 210, the connecting block 26, the connecting box 27 and the cutter 28 are driven to rotate. Due to the rotation of the cutter 28, the extruded plastic material can be cut, thereby realizing granulation.

[0037] During the rotation of the cutter 28, the spring telescopic rod 32 in a compressed state will push the movable arm 33 to rotate along the axis movably mounted with the bracket 31 due to the restoring effect of the elastic force, and push the abutting rod 35 and the fixed sleeve 211 through the circular shaft 36, and apply abutting force to the cutter 28 through the fixed sleeve 211 to avoid a gap between the cutter 28 and the die head. When the compression of the spring telescopic rod 32 is at its maximum value, since the force distance of the spring telescopic rod 32 on the movable arm 33 is short and the force distance of the circular shaft 36 on the movable arm 33 is long, the abutting force of the cutter 28 on the die head of the plastic extruder 1 is much smaller than the elastic force of the spring telescopic rod 32 at this time, thereby avoiding the excessive abutting force of the cutter 28 on the die head of the plastic extruder 1 caused by the excessive elastic force of the spring telescopic rod 32 in the initial state, and avoiding the cutter 28 from wearing too quickly at the initial stage.

[0038] As the cutter 28 gradually wears, the spring telescopic rod 32 will gradually extend. As the spring telescopic rod 32 gradually extends, the elastic force of the spring telescopic rod 32 will gradually decrease, and the movable arm 33 will gradually rotate. When the movable arm 33 rotates, the circular shaft 36 will move upward in the movable groove 34, and at the same time, the torque distance of the circular shaft 36 will gradually shorten, so that the influence of the force of the spring telescopic rod 32 on 38 will gradually increase, so that the elastic force of the spring telescopic rod 32 will gradually decrease, and the torque distance of the circular shaft 36 will gradually decrease, thereby avoiding the problem of insufficient contact force between 38 and the die head of the plastic extruder 1 after the elastic force of the spring telescopic rod 32 decreases.

[0039] As the rotating shaft 23 rotates, the rotating arm 214 will be driven to rotate together. Due to the rotation of the rotating arm 214, the abutment wheel 215 can abut and push the abutment plate 410 and the piston rod 42 to descend, and the tension spring 43 is stretched. Due to the descent of the piston rod 42, the one-way valve 247 is opened, and the cooling water in the liquid cylinder 41 can be transported to the sealing sleeve 213 through the telescopic tube 46, and enter the movable sleeve 210 through the through hole 212, and then enter the inner cross disk 25, the connecting block 26 and the connecting box 27, and finally sprayed onto the cutter 28 through the liquid outlet 29 to cool the cutter 28 and reduce the wear rate of the cutter 28.

[0040] The water sprayed on the cutter 28 will flow down into the water tank 48, and the separation net 49 is used to prevent the entry of plastic particles.

[0041] When the wheel 215 is separated from the plate 410, the elastic restoring effect of the tension spring 43 can drive the piston rod 42 to rise and open the one-way valve 45, and the cooling water in the water tank 48 is pumped into the liquid cylinder 41 through the liquid inlet pipe 44 to form a circulation.

[0042] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0043] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A plastic melt extrusion regeneration granulation equipment, characterized in that, It comprises a plastic extruder (1), a rotary knife granulating mechanism (2) and a compensation mechanism (3); The rotary knife granulation mechanism (2) is arranged on the plastic extruder (1), and the compensation mechanism (3) is arranged on the rotary knife granulation mechanism (2); The rotary knife granulation mechanism (2) includes a mounting frame (21), the mounting frame (21) is mounted on the discharge end of the plastic extruder (1), a motor (22) is mounted above the mounting frame (21), the output end of the motor (22) is connected to a rotating shaft (23), the other end of the rotating shaft (23) is connected to a cross shaft (24), the outer movable sleeve of the cross shaft (24) is provided with an inner cross disk (25), the outer portion of the inner cross disk (25) is fixedly connected to four surrounding connecting blocks (26), the other end of the connecting block (26) is fixedly connected to a connecting box (27), the other side of the connecting box (27) is connected to a cutter (28) abutting against the die head of the plastic extruder (1), one side of the inner cross disk (25) is fixedly connected to a movable sleeve (210), and the outer rotating sleeve of the movable sleeve (210) is provided with a fixed sleeve (211); The compensation mechanism (3) includes a bracket (31), the bracket (31) is fixedly mounted on the mounting frame (21), a spring telescopic rod (32) is hingedly connected to the bracket (31), an output end of the spring telescopic rod (32) is hingedly connected to a movable arm (33) movably mounted on the bracket (31), a movable slot (34) is provided in the movable arm (33), a support rod (35) is hingedly connected above the fixed sleeve (211), and a circular shaft (36) is provided in the internal fixed sleeve at the other end of the support rod (35) and is movable in the movable slot (34).

2. A plastic melt extrusion regeneration granulation equipment according to claim 1, characterized in that: Both sides of the fixed sleeve (211) are fixedly connected to a sliding frame (216), and the sliding sleeve of the sliding frame (216) is arranged on the mounting frame (21).

3. The plastic melt extrusion regeneration granulation equipment according to claim 1, characterized in that: The connection box (27) is provided with a group of liquid outlet holes (29) facing the cutter (28), the outside of the movable sleeve (210) is provided with a group of through holes (212), the outer movable sleeve of the movable sleeve (210) is provided with a sealing sleeve (213), and the interior of the sealing sleeve (213) is communicated with the through holes (212).

4. The plastic melt extrusion regeneration granulation equipment according to claim 1, characterized in that: The external fixed sleeve of the rotating shaft (23) is provided with a rotating arm (214), and a stop wheel (215) is movably mounted on the rotating arm (214).

5. The plastic melt extrusion regeneration granulation equipment according to claim 3, characterized in that: The invention also includes a cooling mechanism (4), wherein the cooling mechanism (4) is arranged on the rotary knife granulating mechanism (2), and the cooling mechanism (4) includes a liquid cylinder (41), wherein the liquid cylinder (41) is mounted on the mounting frame (21), wherein a piston rod (42) is provided inside the liquid cylinder (41), and a tension spring (43) is provided outside the piston rod (42), wherein one end of the tension spring (43) is connected to the inner wall of the liquid cylinder (41), and the other end of the tension spring (43) is connected to the piston rod (42), and the top end of the piston rod (42) is connected to a stop plate (410).

6. The plastic melt extrusion regeneration granulation equipment according to claim 5, characterized in that: One side of the liquid cylinder (41) is connected to a telescopic tube (46) capable of transverse expansion and contraction, the other end of the telescopic tube (46) is connected to the sealing sleeve (213), and a one-way valve 2 (47) is provided in the telescopic tube (46).

7. The plastic melt extrusion regeneration granulation equipment according to claim 5, characterized in that: A water tank (48) is connected to the mounting frame (21), and a partition net (49) is installed on the water tank (48).

8. The plastic melt extrusion regeneration granulation equipment according to claim 7, characterized in that: A liquid inlet pipe (44) is connected between the water tank (48) and the liquid cylinder (41), and a one-way valve (45) is provided in the liquid inlet pipe (44).

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