Die head pelletizing device of extruder

Abstract

The utility model relates to the technical field of plastic granulation, in particular to a die head granulating device of an extruder, which comprises a machine body, a material extruding component arranged on the machine body, a material cutting component matched with the material extruding component for use, and a driving component in driving connection with the material cutting component, the cutting assembly comprises a cutter shaft, a cutter rest arranged on the cutter shaft, a cutter holder detachably arranged on the cutter rest and a blade arranged between the cutter rest and the cutter holder, a material extruding plate is arranged at the end, close to the material extruding assembly, of the machine body, and the blade rotationally abuts against the outer wall of the material extruding plate. The machine body is provided with a nozzle, and the central axis of the nozzle and the central axis of the material extruding plate are arranged in parallel in a spaced mode. The plastic cutting machine is compact in structure and reasonable in design, the machine body is cooled by blowing air through the nozzles, plastic agglomerates adhered to the cutter are reduced, the cooling speed is high, the occupied area is reduced, the operation is flexible and efficient, and the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of plastic granulation, especially to a die head pelletizing device of extruder. BACKGROUND

[0002] After the plastic is extruded through the discharge die head of the extruder, the rotating cutter directly cuts the just-extruded hot round strip-shaped plastic into pellet-shaped plastic, and then the pellet-shaped plastic is all collected and uniformly conveyed to another station for cooling operation, so as to ensure that the plastic is completed in the temperature range required by the process, therefore, the existing pelletizer mostly only has the pelletizing function, the use function is single, and the plastic is easy to clump and adhere to the cutter in the pelletizing process, which affects the plastic cutting quality, when the pellet-shaped plastic needs to be cooled, other conveying mechanisms are needed to carry and transfer back and forth, which is time-consuming and labor-consuming in operation, also increases the floor area of the production line, increases the production cost, and affects the work efficiency. SUMMARY

[0003] The utility model discloses a die head pelletizing device of extruder, compact structure and reasonable in design, through the nozzle to the body blow -off cooling, not only reduce the plastic clump and adhere to the cutter, cooling speed is fast, and reduce the floor area, and the operation is flexible and efficient, improves work efficiency.

[0004] To achieve the above object, a die head pelletizing device of extruder of the utility model, including machine body, the extrusion assembly of setting in machine body, the cutting assembly of using with extrusion assembly cooperation and the drive assembly of drive connection with cutting assembly, cutting assembly includes cutter shaft, the cutter rest of setting in cutter shaft, the cutter seat of detachable setting in cutter rest and the blade of installing between cutter rest and cutter seat, the one end of machine body near extrusion assembly is provided with extrusion plate, the outer wall of extrusion plate is contacted to the rotation of blade, so that the blade is cut into pellet-shaped plastic to the strip-shaped plastic of extrusion through extrusion plate, the nozzle is arranged in the machine body, and the central axis of nozzle and the central axis of extrusion plate are spaced apart and parallel.

[0005] Preferably, the blade is provided with a first connecting hole and a second connecting hole, the cutter holder is provided with a first mounting hole, a second mounting hole, a first mounting screw arranged in the first mounting hole, and a second mounting screw arranged in the second mounting hole, the cutter seat is provided with a first assembly hole and a second assembly hole, the first mounting screw passes through the first mounting hole, the first connecting hole in sequence and is connected to the first assembly hole, the second mounting screw passes through the second mounting hole, the second connecting hole in sequence and is connected to the second assembly hole, and the central axis of the first mounting screw and the central axis of the second mounting screw are vertically arranged.

[0006] Preferably, the extruding assembly comprises an upper extruding cylinder, a lower extruding cylinder arranged on the upper extruding cylinder, a clamping member arranged between the upper extruding cylinder and the lower extruding cylinder, a first extruding channel arranged on the upper extruding cylinder, and a second extruding channel arranged on the lower extruding cylinder, the first extruding channel penetrating through the upper extruding cylinder to communicate with the second extruding channel, and the second extruding channel penetrating through the lower extruding cylinder to communicate with the extruding plate.

[0007] Preferably, the clamping member comprises a base, a first clamping arm and a second clamping arm rotatably arranged on the base, a connecting shaft arranged on the first clamping arm, a connecting screw rotatably connected to the connecting shaft, and a connecting nut arranged on the connecting screw, the second clamping arm is provided with a clamping groove, and the connecting screw protrudes into the clamping groove to be threadedly connected with the connecting nut.

[0008] Preferably, the first clamping arm and the second clamping arm are arranged around the circumferences of the upper extruding cylinder and the lower extruding cylinder, and a sealing ring is arranged between the upper extruding cylinder and the lower extruding cylinder.

[0009] Preferably, the driving assembly comprises a reducer and a driving motor arranged on the reducer, and the driving motor is drivingly connected with the cutter shaft through the reducer.

[0010] The extruding assembly of the utility model has the advantages of compact structure and reasonable design, the nozzle is used for blowing and cooling the machine body, the plastic clumps are reduced in adhesion on the cutter, the cooling speed is high, the land occupation is reduced, the operation is flexible and efficient, and the working efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0011] Fig. 1 It is a structural schematic view of the utility model.

[0012] Fig. 2 It is an exploded structural schematic view of the extruding assembly of the utility model.

[0013] Fig. 3 It is an exploded structural schematic view of the cutting assembly of the utility model.

[0014] The reference signs comprise:

[0015] 1 - machine body 11 - extruding plate 12 - nozzle

[0016] 2 - extruding assembly 21 - upper extruding cylinder 22 - lower extruding cylinder

[0017] 23 - clamping member 231 - base 232 - first clamping arm

[0018] 233 - second clamping arm 234 - connecting shaft 235 - connecting screw

[0019] 236 - connecting nut 237 - clamping groove

[0020] 24 - first extrusion channel 25 - second extrusion channel 26 - sealing ring

[0021] 3 - cutting assembly 31 - knife shaft

[0022] 32 - knife holder 321 - first mounting hole 322 - second mounting hole

[0023] 323 - first mounting screw 324 - second mounting screw

[0024] 33 - knife seat 331 - first assembly hole 332 - second assembly hole

[0025] 34 - knife blade 341 - first connecting hole 342 - second connecting hole

[0026] 4 - drive assembly 41 - speed reducer 42 - drive motor DETAILED DESCRIPTION

[0027] The utility model is described in detail below in combination with the drawings.

[0028] As Figs. 1 to 3 shown, the die cutting device of the extruder of the utility model, including machine body 1, set up in the extrusion assembly 2 of machine body 1, the cutting assembly 3 of extrusion assembly 2 cooperation uses and the drive assembly 4 of drive connection with cutting assembly 3, the cutting assembly 3 includes knife shaft 31, set up in the knife holder 32 of knife shaft 31, the knife seat 33 of detachable setting in the knife holder 32 and the knife blade 34 of installing between the knife holder 32 and the knife seat 33, the extrusion plate 11 is set to the one end of machine body 1 close to extrusion assembly 2, the knife blade 34 rotationally touches the outer wall of extrusion plate 11, to make the knife blade 34 cut out the strip plastic via extrusion plate 11 into granular plastic, the machine body 1 is provided with nozzle 12, the central axis of nozzle 12 and the central axis of extrusion plate 11 are spaced and parallel to each other and are arranged.

[0029] In operation, plastic enters the machine body 1 through the extruding assembly 2, the nozzle 12 is connected to an external air blower, cold air is continuously blown into the machine body 1 through the nozzle 12, the output end of the driving assembly 4 is drivingly connected to the cutter shaft 31, so that the cutter shaft 31 drives the cutter blade 34 to rotate at high speed through the cutter holder 32, the rotating cutter blade 34 cuts the hot round strip-shaped plastic just extruded into granular plastic, the granular plastic falls from top to bottom in the machine body 1 under the action of gravity, the cold air provides centrifugal force and throws the falling granular plastic to the arc-shaped inner wall of the machine body 1, so that the cold air repeatedly flows along the arc-shaped inner wall with the granular plastic and fully cools the granular plastic. Since the central axis of the nozzle 12 and the central axis of the extruding plate 11 are spaced apart and parallel to each other, that is, the blowing direction of the cold air and the falling direction of the granular plastic are parallel to each other, so that the extrusion of the round strip-shaped plastic and the cooling of the plastic are not interfered with each other and are independently and efficiently completed. In addition, the outer cover of the machine body 1 is also provided with a lighting lamp and a visible window, which facilitates clear observation of the working condition of the cutting assembly 3 and daily maintenance and repair, and the nozzle 12 can also be replaced by an atomizing nozzle 12, liquid is extruded into the nozzle 12 through internal pressure, the liquid forms atomized particles with a diameter of about 15-60 microns after impacting in the nozzle 12, and is sprayed out through the nozzle 12 outlet, which plays a good cooling and humidifying effect. The utility model has compact structure and reasonable design, the machine body 1 is blown and cooled through the nozzle 12, which not only reduces the plastic agglomeration and adhesion on the cutter, but also has fast cooling speed, reduces the occupied area, is flexible and efficient to operate, and improves work efficiency.

[0030] The blade 34 of the embodiment is provided with a first connecting hole 341 and a second connecting hole 342, the tool holder 32 is provided with a first mounting hole 321, a second mounting hole 322, a first mounting screw 323 arranged in the first mounting hole 321, and a second mounting screw 324 arranged in the second mounting hole 322, the tool seat 33 is provided with a first assembly hole 331 and a second assembly hole 332, the first mounting screw 323 passes through the first mounting hole 321, the first connecting hole 341 in sequence and is connected to the first assembly hole 331, the second mounting screw 324 passes through the second mounting hole 322, the second connecting hole 342 in sequence and is connected to the second assembly hole 332, and the central axis of the first mounting screw 323 and the central axis of the second mounting screw 324 are arranged vertically. Specifically, the first mounting screw 323 passes through the first mounting hole 321, the first connecting hole 341 in sequence and is connected and fixed in the first assembly hole 331, the second mounting screw 324 passes through the second mounting hole 322, the second connecting hole 342 in sequence and is connected and fixed in the second assembly hole 332, so that the central axis of the first mounting screw 323 and the central axis of the second mounting screw 324 are arranged vertically, thereby fastening the position of the blade 34 between the tool holder 32 and the tool seat 33 from the two directions of the transverse direction and the longitudinal direction, the connection is firm and reliable, the efficient operation of the cutting work is ensured, and the blade 34 adopts a flexible design, the cutting uniformity is high, and the situation of trailing and debris is reduced.

[0031] The extrusion assembly 2 of the embodiment includes an upper extrusion cylinder 21, a lower extrusion cylinder 22 arranged in the upper extrusion cylinder 21, a clamping piece 23 arranged between the upper extrusion cylinder 21 and the lower extrusion cylinder 22, a first extrusion channel 24 arranged in the upper extrusion cylinder 21, and a second extrusion channel 25 arranged in the lower extrusion cylinder 22, the first extrusion channel 24 penetrates the upper extrusion cylinder 21 to communicate with the second extrusion channel 25, and the second extrusion channel 25 penetrates the lower extrusion cylinder 22 to communicate with the extrusion plate 11. Specifically, the clamping piece 23 is clamped and sleeved between the upper extrusion cylinder 21 and the lower extrusion cylinder 22, so that the first extrusion channel 24 penetrates the upper extrusion cylinder 21 to communicate with the second extrusion channel 25, and the second extrusion channel 25 penetrates the lower extrusion cylinder 22 to communicate with the extrusion plate 11, so that the plastic is smoothly extruded through the extrusion plate 11 by the double extrusion action of the upper extrusion cylinder 21 and the lower extrusion cylinder 22, the structure is compact and the design is reasonable.

[0032] The clamping piece 23 of the embodiment comprises a base 231, a first clamping arm 232 and a second clamping arm 233 rotatably arranged on the base 231, a connecting shaft 234 arranged on the first clamping arm 232, a connecting screw 235 rotatably connected to the connecting shaft 234, and a connecting nut 236 arranged on the connecting screw 235, the second clamping arm 233 is provided with a clamping groove 237, and the connecting screw 235 protrudes into the clamping groove 237, so that the connecting screw 235 is threadedly connected with the connecting nut 236. Specifically, the first clamping arm 232 and the second clamping arm 233 are opened or closed relative to the base 231, so that the first clamping arm 232 and the second clamping arm 233 surround the outer walls of the upper extrusion cylinder 21 and the lower extrusion cylinder 22, the connecting shaft 234 passes through the connecting screw 235 and is connected to the first clamping arm 232, so that the connecting screw 235 is rotatably protruded into the clamping groove 237, facilitating the threadedly connecting and fixing of the connecting screw 235 and the connecting nut 236, thereby realizing the clamping and fixing of the clamping piece 23 between the upper extrusion cylinder 21 and the lower extrusion cylinder 22.

[0033] The first clamping arm 232 and the second clamping arm 233 of the embodiment are arranged around the circumferences of the upper extrusion cylinder 21 and the lower extrusion cylinder 22, and a sealing ring 26 is arranged between the upper extrusion cylinder 21 and the lower extrusion cylinder 22. Specifically, the first clamping arm 232 and the second clamping arm 233 abut against the outer walls of the upper extrusion cylinder 21 and the lower extrusion cylinder 22, and the sealing ring 26 is arranged between the upper extrusion cylinder 21 and the lower extrusion cylinder 22, which mainly prevents liquid, gas or particulate matter from entering the joint surface from the external environment, and even entering the internal structure, thereby ensuring the normal operation and service life of the upper extrusion cylinder 21 and the lower extrusion cylinder 22.

[0034] The driving assembly 4 of the embodiment comprises a reducer 41 and a driving motor 42 arranged on the reducer 41, and the driving motor 42 is drivingly connected with the cutter shaft 31 through the reducer 41. Specifically, the driving motor 42 is drivingly connected with the cutter shaft 31 through the reducer 41, and the output torque is increased by reducing the rotating speed, thereby meeting the working requirements of plastic pelletizing.

[0035] The above is only a preferred embodiment of the present application, and for those skilled in the art, according to the idea of the present application, the specific implementation and application range can be changed, and the content of the specification should not be understood as limiting the present application.

Claims

1. A die-cutting device for an extruder, characterized in that: The device includes a body, an extrusion assembly disposed on the body, a cutting assembly used in conjunction with the extrusion assembly, and a drive assembly drivenly connected to the cutting assembly. The cutting assembly includes a cutter shaft, a cutter holder disposed on the cutter shaft, a cutter base detachably disposed on the cutter holder, and a blade disposed between the cutter holder and the cutter base. An extrusion plate is disposed at one end of the body near the extrusion assembly. The blade rotates and abuts against the outer wall of the extrusion plate, so that the blade cuts the strip-shaped plastic extruded through the extrusion plate into granular plastic. The body is provided with a nozzle, and the central axis of the nozzle is spaced apart from and parallel to the central axis of the extrusion plate.

2. The die-cutting device for an extruder according to claim 1, characterized in that: The blade is provided with a first connecting hole and a second connecting hole. The tool holder is provided with a first mounting hole, a second mounting hole, a first mounting screw in the first mounting hole, and a second mounting screw in the second mounting hole. The tool holder is provided with a first assembly hole and a second assembly hole. The first mounting screw passes through the first mounting hole and the first connecting hole in sequence and is connected to the first assembly hole. The second mounting screw passes through the second mounting hole and the second connecting hole in sequence and is connected to the second assembly hole. The central axis of the first mounting screw and the central axis of the second mounting screw are perpendicular to each other.

3. The die-cutting device for an extruder according to claim 1, characterized in that: The extrusion assembly includes an upper extrusion cylinder, a lower extrusion cylinder disposed on the upper extrusion cylinder, a clamping component disposed between the upper extrusion cylinder and the lower extrusion cylinder, a first extrusion channel disposed on the upper extrusion cylinder, and a second extrusion channel disposed on the lower extrusion cylinder. The first extrusion channel passes through the upper extrusion cylinder to connect with the second extrusion channel, and the second extrusion channel passes through the lower extrusion cylinder to connect with the extrusion plate.

4. The die-cutting device for an extruder according to claim 3, characterized in that: The clamping component includes a base, a first clamping arm and a second clamping arm rotatably disposed on the base, a connecting shaft disposed on the first clamping arm, a connecting screw rotatably connected to the connecting shaft, and a connecting nut disposed on the connecting screw. The second clamping arm has a clamping groove, and the connecting screw protrudes into the clamping groove so that the connecting screw and the connecting nut are threadedly connected.

5. The die-cutting device for an extruder according to claim 4, characterized in that: The first clamping arm and the second clamping arm are arranged around the upper extrusion cylinder and the lower extrusion cylinder in the circumference, and a sealing ring is provided between the upper extrusion cylinder and the lower extrusion cylinder.

6. The die-cutting device for an extruder according to claim 1, characterized in that: The drive assembly includes a reducer and a drive motor disposed on the reducer, and the drive motor is connected to the cutter shaft via the reducer.

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