CN113370497A

CN113370497A - Cooling device of plastic particle double-screw extruder

Info

Publication number: CN113370497A
Application number: CN202110715116.3A
Authority: CN
Inventors: 刘土法; 刘博韬; 王玲; 李祥伟
Original assignee: Nanjing Hone Machinery Electronics Co ltd
Current assignee: Nanjing Hone Machinery Electronics Co ltd
Priority date: 2021-06-26
Filing date: 2021-06-26
Publication date: 2021-09-10
Anticipated expiration: 2041-06-26
Also published as: CN113370497B

Abstract

The utility model relates to a cooling device of plastic granules double screw extruder, belong to the field of extrusion equipment, which comprises a base, water tank and cold water machine, be equipped with the framed bent on the base, be equipped with the decurrent cooling tube of a plurality of slopes on the framed bent, equal vertical first branch pipe that is connected with on the pipe wall of the ascending one end of each cooling tube slope, each first branch pipe is through advancing water piping connection, the equal vertical second branch pipe that is connected with of the decurrent one end of each cooling tube slope, each second branch pipe passes through water piping connection, the water pump is installed to water tank one side, the water pump water inlet passes through the raceway and links to each other with the water tank, the water pump delivery port links to each other with the water inlet of cold water machine through first water pipe, the delivery port of cold water machine passes through the second water pipe and links to each other with the inlet tube, the outlet pipe links to each other with the water tank. This application has improved the cooling effect of material strip.

Description

Cooling device of plastic particle double-screw extruder

Technical Field

The application relates to the field of extrusion equipment, in particular to a cooling device of a plastic particle double-screw extruder.

Background

The double-screw extruder is developed on the basis of a single-screw extruder, and has the characteristics of good feeding performance, mixing and plasticizing performance, exhaust performance, extrusion stability and the like, so that the double-screw extruder is widely applied to molding and processing of extruded products at present.

Chinese patent with publication number CN201736365U discloses a broken strip automatic alarm device for a water-cooling brace granulating production line of a double-screw extruder, wherein a cooling water tank is arranged between the double-screw extruder and the granulator, the mouth mold direction of the double-screw extruder faces the cooling water tank, a detector is arranged below the mouth mold of the double-screw extruder, and the detector is connected with the alarm through a signal line.

In view of the above-mentioned related art, the inventor believes that the temperature of water in the water tank will increase with the continuous cooling of the bar, and the cooling effect of the bar will be affected.

Disclosure of Invention

In order to improve the cooling effect of material strip, the application provides a plastic granules twin-screw extruder's cooling device.

The application provides a cooling device of plastic granules double screw extruder adopts following technical scheme:

the utility model provides a plastic granules double screw extruder's cooling device, includes base, water tank and cold water machine, be equipped with the framed bent on the base, be equipped with the decurrent cooling tube of a plurality of slopes on the framed bent, each equal vertical first branch pipe that is connected with on the pipe wall of the ascending one end of cooling tube slope, each first branch pipe is through advancing water piping connection, each the equal vertical second branch pipe that is connected with of the decurrent one end of cooling tube slope, each the second branch pipe is through going out water piping connection, the water pump is installed to water tank one side, the water pump water inlet passes through the raceway and links to each other with the water tank, and the water pump delivery port links to each other with the water inlet of cold water machine through first water pipe, the delivery port of cold water machine passes through the second water pipe and links to each other with the inlet tube, the outlet pipe links to each other with the water tank.

By adopting the technical scheme, the water pump is started to pump the water in the water tank into the water chiller, so that the water is cooled and then conveyed into the water inlet pipe, the cold water in the water inlet pipe is divided into the cooling pipes, and the cold water in the cooling pipes is converged into the water tank through the second branch pipe to form cold water circulation; the operator penetrates the material strip from each cooling tube, utilizes cold water stream to cool off the material strip, because every material strip all adopts solitary rivers to cool off to cool down to water through the cold water machine and improve material strip cooling effect, reduced required water yield.

Optionally, the bent frame is provided with two parallel guide rails, two slide blocks corresponding to the cooling pipes are connected to the guide rails in a sliding mode, each slide block is connected with the cooling pipe through a connecting piece, each slide block is connected with a limit screw in a threaded mode, and the end portion of each limit screw is tightly abutted to the bottom of the guide rail.

Through adopting above-mentioned technical scheme, the interval between the cooling tube is adjusted to the portable slider of operator, makes it corresponding with the material strip, and the flexibility is high.

Optionally, the connecting piece includes a clamp and a spring, the two ends of the clamp are both provided with hooks, the slider is provided with two sinking grooves, the spring and the sinking grooves are in one-to-one correspondence, one end of the spring is connected with the bottom of the sinking groove, the other end of the spring is provided with a ring buckle, the two ends of the hooks are respectively inserted into the two sinking grooves, the hooks are buckled with the ring buckle, and the cooling pipe is located on the inner side of the clamp and tightly abutted to the slider; the side wall of the ring buckle is in threaded connection with a shifting rod, and the wall of the sinking groove is provided with a moving groove for the shifting rod to penetrate out.

Through adopting above-mentioned technical scheme, the operator upwards stimulates the clamp, treats that the pothook removes after the heavy groove and removes pothook and latch closure separation, alright dismantle the clamp to load and unload simple and convenient to the cooling tube.

Optionally, a servo cylinder is installed in the base, the servo cylinders are vertically distributed, driving rods of the servo cylinders are connected with the bent frame, a plurality of guide sleeves are arranged in the base, guide rods are inserted into the guide sleeves, and the guide rods are connected with the bent frame.

Through adopting above-mentioned technical scheme, servo cylinder starts, and the drive framed bent reciprocates to the relative position between adjustment cooling tube and die head is convenient for reduce the distance of material strip between die head and cooling tube.

Optionally, be equipped with on the framed bent and establish ties with the corresponding forced air cooling ring of each cooling tube, each the forced air cooling ring passes through the gas-supply pipe, gas-supply pipe and high pressurized air source intercommunication, the forced air cooling intra-annular rotates and is connected with the sealing ring, the annular has been seted up to the sealing ring outer lane, a plurality of gas pockets have been seted up to the sealing ring inner wall, gas pocket and annular intercommunication, be equipped with on the forced air cooling ring and be used for driving sealing ring pivoted driving piece.

Through adopting above-mentioned technical scheme, the material strip passes from the sealing ring, and driving piece drive sealing ring rotates, and the gas-supply pipe is with the leading-in annular of highly-compressed air for each gas pocket blowout air current goes on the material strip and the remaining water stain air-dries in material strip surface, and the gas pocket of rotation has still improved the homogeneity of air current to material strip surface covering simultaneously.

Optionally, the driving member includes a servo motor and a bevel gear, the bevel gear is coaxially fixed on a motor shaft of the servo motor, and one end of the sealing ring is engaged with the bevel gear.

By adopting the technical scheme, the servo motor is started to drive the bevel gear to rotate, the bevel gear drives the bevel gear ring to rotate, and the bevel gear ring drives the sealing ring to rotate.

Optionally, the air cooling ring comprises a first ring plate and a second ring plate, the second ring plate is provided with two rings and distributed on two sides of the first ring plate, the first ring plate is connected with the second ring plate through screws, the second ring plate is provided with an annular limiting convex edge on one opposite side, and a limiting groove for inserting the limiting convex edge is formed in the side wall of the sealing ring.

Through adopting above-mentioned technical scheme, first crown plate and second crown plate adopt can dismantle connected mode, be convenient for with the loading and unloading of sealing ring.

Optionally, the sealing ring periphery wall all is equipped with annular elastic sealing pad in the both sides of annular, the seal groove that supplies the embedding of elastic sealing pad is seted up to first crown plate inside wall.

Through adopting above-mentioned technical scheme, the cooperation of elastic sealing pad and seal groove has reduced the possibility that gas leaks.

Optionally, the bent frame is provided with guide wheels on both sides of the air cooling ring.

Through adopting above-mentioned technical scheme, the guide pulley has played the supporting role to the material strip, has reduced the condition of interfering with the sealing ring inner wall.

Optionally, the side wall of the water tank is provided with an exhaust pipe, one end of the exhaust pipe is communicated with the high-pressure air source, and the other end of the exhaust pipe extends into the water tank.

Through adopting above-mentioned technical scheme, high-pressure gas lets in the aquatic of water tank, can take away partly heat when gas emerges from the aquatic, has played the effect of cooling to the water tank normal water.

In summary, the present application includes at least one of the following beneficial technical effects:

1. each material strip is cooled by adopting independent water flow, and the cooling effect is ensured by cooling water through a water cooler, so that the required water quantity is reduced;

2. the air flow is sprayed out through the air holes to dry the material strips and the water stains remained on the surfaces of the material strips, and meanwhile, the uniformity of the air flow covering the surfaces of the material strips is improved due to the rotating air holes.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.

Fig. 2 is a schematic structural diagram for embodying a guide rail according to an embodiment of the present application.

Fig. 3 is a schematic structural diagram for embodying a cooling pipe according to an embodiment of the present application.

Fig. 4 is an enlarged view of a in fig. 3.

Fig. 5 is a schematic structural diagram for embodying the connecting member according to the embodiment of the present application.

Fig. 6 is a schematic structural diagram for embodying an air-cooled ring according to an embodiment of the present application.

Description of reference numerals: 1. a base; 11. a water tank; 111. an exhaust pipe; 12. a water chiller; 13. a bent frame; 14. a cooling tube; 141. a first branch pipe; 142. a second branch pipe; 15. a water inlet pipe; 16. a water outlet pipe; 17 a water pump; 171. a water delivery pipe; 172. a first water pipe; 18. a second water pipe; 2. a guide rail; 21. a slider; 22. a limit screw; 3. a connecting member; 31. clamping a hoop; 311. a hook; 32. a bullet ; 321. looping; 33. sinking a groove; 34. a deflector rod; 35. a moving groove; 4. a servo cylinder; 41. a guide sleeve; 42. a guide bar; 5. an air cooling ring; 51. a first ring plate; 52. a second ring plate; 53. a limiting convex rib; 54. a limiting groove; 55. an elastic sealing gasket; 56. a sealing groove; 6. a gas delivery pipe; 61. a seal ring; 611. a ring groove; 612. air holes; 7. a drive member; 71. a servo motor; 711. a bevel gear; 72. a bevel gear ring; 8. and (4) a guide wheel.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses a cooling device of a plastic particle double-screw extruder. As shown in fig. 1 and 2, the cooling device of the plastic particle twin-screw extruder comprises an extruder body and a base 1, wherein a die head is installed at the discharge end of a machine barrel of the extruder body, the base 1 and the die head are distributed oppositely, a bent frame 13 is supported on the base 1, a servo cylinder 4 and a plurality of guide sleeves 41 distributed around the servo cylinder 4 are vertically arranged in the base 1, guide rods 42 are inserted in the guide sleeves 41, and a driving rod of the servo cylinder 4 and each guide rod 42 are upwards connected with the bottom of the bent frame 13.

As shown in fig. 2 and 3, two ends of the bent frame 13 along the length direction are respectively provided with a guide rail 2, the two guide rails 2 are parallel to each other, the two guide rails 2 are respectively connected with a plurality of sliding blocks 21 in a sliding manner, each sliding block 21 is connected with a limit screw 22 in a threaded manner, and the end part of each limit screw 22 downwards penetrates through the corresponding sliding block 21 and is tightly abutted against the inner bottom surface of the corresponding guide rail 2 to limit the movement of the corresponding sliding block 21; the slide blocks 21 on the two guide rails 2 are in one-to-one correspondence, each group of two opposite slide blocks 21 is fixedly provided with a cooling pipe 14 through a connecting piece 3, the cooling pipes 14 are obliquely arranged, the inner diameter of each cooling pipe 14 is larger than the diameter of a material strip, the obliquely upward end of each cooling pipe 14 is positioned below a die head, the obliquely upward end of the outer wall of each cooling pipe 14 is provided with a first branch pipe 141 which is vertically upward, each first branch pipe 141 is sequentially connected in series through a water inlet pipe 15, the obliquely downward end of each cooling pipe 14 is connected with a second branch pipe 142 which is vertically downward, the inner diameter of the second branch pipe 142 is larger than the inner diameter of the cooling pipe 14, each second branch pipe 142 is sequentially connected in series through a water outlet pipe 16, a water tank 11 and a water cooling machine 12 are arranged in the base 1, exhaust pipes 111 and water pumps 17 are respectively arranged on two opposite sides of the water tank 11, one end of the exhaust pipe 111 is communicated with a high-pressure air source, and the other end is inserted into water in the water tank 11, the water inlet of the water pump 17 is communicated with the water tank 11 through a water pipe 171, the water outlet of the water pump 17 is connected with the water inlet of the water cooler 12 through a first water pipe 172, the water outlet of the water cooler 12 is communicated with the water inlet pipe 15 through a second water pipe 18, and the water outlet pipe 16 is communicated with the water tank 11.

The water pump 17 is started to convey water in the water tank 11 to the water cooler 12, a refrigeration system in the water cooler 12 cools the water to form cold water, the cold water is conveyed to the water inlet pipe 15 through the second water pipe 18 and then is distributed to the cooling pipes 14 through the first branch pipes 141, the cold water flows downwards along the cooling pipes 14 and flows into the water outlet pipe 16 through the second branch pipes 142 due to the inclined arrangement of the cold water pipes, and finally the water is conveyed back to the water tank 11 through the water outlet pipe 16 to form a cold water circulation.

As shown in fig. 4 and 5, the connecting member 3 includes a clip 31, the clip 31 is Contraband-shaped, the two ends of the clip 31 are both provided with hooks 311, the slide block 21 is provided with an arc groove and two sinking grooves 33 symmetrically distributed about the arc groove, the cooling pipe 14 is partially inserted into the arc groove, the bottoms of the two sinking grooves 33 are both provided with springs 32, one end of each spring 32 far away from the bottom of each sinking groove 33 is connected with a buckle 321, and when the springs 32 are in a natural state, the buckles 321 are located in the sinking grooves 33; the ring buckle 321 has a screw thread on the side wall of the driving lever 34, the groove wall of the sinking groove 33 is provided with a moving groove 35 for the driving lever 34 to penetrate out of the sliding block 21, and the moving groove 35 extends along the axial direction of the sinking groove 33. When the cooling pipe 14 is fixed, an operator moves the shift lever 34 to move the ring buckle 321 out of the sinking groove 33, then the hook 311 is buckled with the ring buckle 321, the two ends of the hoop 31 are respectively inserted into the corresponding sinking grooves 33 until the inner top surface of the hoop 31 is abutted against the cooling pipe 14, at this time, the spring 32 is in a stretched state, and the hoop 31 compresses the cooling pipe 14 on the sliding block 21 under the elastic tension of the spring 32 to fix the cooling pipe 14.

As shown in fig. 3 and 6, one end of the bent frame 13, which is far away from the extruder body, is provided with a plurality of air-cooling rings 5, the air-cooling rings 5 correspond to the cooling pipes 14 one by one, and the air-cooling rings 5 are located in the axial direction in which the corresponding cooling pipes 14 are inclined downwards; air-cooled ring 5 includes first crown plate 51 and two second crown plates 52, two second crown plates 52 all pass through the fix with screw on first crown plate 51's both sides terminal surface, second crown plate 52 internal diameter is less than first crown plate 51 internal diameter, two second crown plates 52 all are equipped with annular spacing bead 53 in relative one side, spacing bead 53 and the coaxial distribution of second crown plate 52, be equipped with sealing ring 61 between two crown plates, spacing groove 54 has all been seted up to the both sides that sealing ring 61 carried on the back mutually, spacing bead 53 and spacing groove 54 one-to-one and both grafting cooperation, the rotation that has realized sealing ring 61 is connected.

The first ring plate 51 of each air cooling ring 5 is connected with a straight-through pipe in a threaded manner, the straight-through pipes are communicated with the inner side of the first ring plate 51 and are sequentially connected in series through air conveying pipes 6, a ring groove 611 is formed in the outer peripheral wall of the sealing ring 61, the ring groove 611 is opposite to the straight-through pipes, annular elastic sealing gaskets 55 are arranged on two sides of the ring groove 611 of the sealing ring 61, a sealing groove 56 corresponding to the elastic sealing gasket 55 is formed in the inner side wall of the first ring plate 51, the elastic sealing gasket 55 is inserted into the sealing groove 56 and freely rotates along with the sealing ring 61, a plurality of air holes 612 are formed in the inner peripheral wall of the sealing ring 61 and are distributed at equal intervals along the circumferential direction of the axis of the sealing ring, the air holes 612 are communicated with the ring groove 611, a driving piece 7 used for driving the sealing ring 61 to rotate is arranged on the second ring plate 52, and guide wheels 8 for conveying the feeding strips in an overlapping mode are arranged on two sides of each sealing ring 61 of the bent frame 13.

The driving part 7 comprises a servo motor 71, the servo motor 71 is arranged on the side wall of the second ring plate 52, a bevel gear 711 is coaxially fixed at the end part of a motor shaft of the servo motor 71, a bevel gear ring 72 which is coaxially distributed is arranged on the end surface of one side of the sealing ring 61, and the bevel gear ring 72 is meshed with the bevel gear 711; the servo motor 71 is started to drive the bevel gear 711 to rotate, the bevel gear 711 drives the bevel gear ring 72 to rotate, and the bevel gear ring 72 drives the sealing ring 61 to synchronously rotate.

The implementation principle of the embodiment of the application is as follows: an operator firstly starts the servo cylinder 4 to drive the bent frame 13 to move, so that the cooling pipes 14 are close to the die heads, then the water pump 17 is started to expand cold water circulation, the material strips extruded from the die heads are placed into the corresponding cooling pipes 14, and the circulating water flow cools the material strips; the material strip passes through the sealing ring 61 after coming out of the cooling pipe 14 along with water flow, an operator starts the servo motor 71 and communicates the gas pipe 6 with a high-pressure gas source, the sealing ring 61 drives the gas holes 612 to rotate, high-speed gas flow is input into the ring groove 611 and blown to the material strip from the gas holes 612, the material strip is cooled by air, and meanwhile, water stains remained on the surface of the material strip are dried by air. When the water in the water tank 11 circulates for a period of time, the operator connects the exhaust pipe 111 to the high-pressure air source, and the high-pressure air flow is input into the water in the water tank 11 along the exhaust pipe 111, and emerges from the water after absorbing a part of the heat in the water, so that the temperature of the water in the water tank 11 is maintained within a certain range.

Because each material strip all adopts solitary cold water circulation, saved the quantity of cooling water on the one hand, on the other hand has reduced the material strip and has converged the heat when together and lead to the possibility that the temperature rose fast, in addition, the cooling water machine 12 and blast pipe 111 have strengthened the cooling effect of material strip to the cooling of circulating water.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a cooling device of plastic granules double screw extruder which characterized in that: the cooling water system comprises a base (1), a water tank (11) and a water cooling machine (12), wherein a bent frame (13) is arranged on the base (1), a plurality of cooling pipes (14) which are inclined downwards are arranged on the bent frame (13), a first branch pipe (141) is vertically connected to the pipe wall of one end, inclined upwards, of each cooling pipe (14), each first branch pipe (141) is connected through a water inlet pipe (15), a second branch pipe (142) is vertically connected to one end, inclined downwards, of each cooling pipe (14), each second branch pipe (142) is connected through a water outlet pipe (16), a water pump (17) is installed on one side of the water tank (11), the water inlet of the water pump (17) is connected with the water tank (11) through a water conveying pipe (171), the water outlet of the water pump (17) is connected with the water inlet of the water cooling machine (12) through a first water pipe (172), and the water outlet of the water cooling machine (12) is connected with the water inlet, the water outlet pipe (16) is connected with the water tank (11).

2. A cooling apparatus of a plastic pellet twin-screw extruder as claimed in claim 1, wherein: be equipped with two guide rail (2) that are parallel to each other on framed bent (13), two equal sliding connection has slider (21) that correspond with each cooling tube (14) on guide rail (2), every slider (21) all are connected with cooling tube (14) through connecting piece (3), every equal threaded connection has stop screw (22) on slider (21), stop screw (22) tip supports tightly with guide rail (2) bottom.

3. The cooling apparatus of a plastic pellet twin-screw extruder as claimed in claim 2, wherein: the connecting piece (3) comprises a clamp (31) and a spring (32), wherein clamping hooks (311) are arranged at two ends of the clamp (31), two sinking grooves (33) are formed in the sliding block (21), the spring (32) corresponds to the sinking grooves (33) one by one, one end of the spring (32) is connected with the bottom of the sinking groove (33), a ring buckle (321) is arranged at the other end of the spring, two ends of the clamping hook (311) are respectively inserted into the two sinking grooves (33), the clamping hook (311) is buckled with the ring buckle (321), and the cooling pipe (14) is located on the inner side of the clamp (31) and is abutted against the sliding block (21); the side wall of the ring buckle (321) is in threaded connection with a shifting rod (34), and the wall of the sinking groove (33) is provided with a moving groove (35) for the shifting rod (34) to penetrate out.

4. A cooling apparatus of a plastic pellet twin-screw extruder as claimed in claim 1, wherein: install servo cylinder (4) in base (1), servo cylinder (4) vertical distribution and the actuating lever of servo cylinder (4) link to each other with framed bent (13), be equipped with a plurality of uide bushing (41) in base (1), each all peg graft in uide bushing (41) and have guide bar (42), each guide bar (42) all link to each other with framed bent (13).

5. A cooling apparatus of a plastic pellet twin-screw extruder as claimed in claim 1, wherein: be equipped with on framed bent (13) and encircle (5) with the corresponding forced air cooling of each cooling tube (14), each forced air cooling encircles (5) and establishes ties through gas-supply pipe (6), gas-supply pipe (6) and high pressurized air source intercommunication, forced air cooling encircles (5) internal rotation and is connected with sealing ring (61), annular (611) have been seted up to sealing ring (61) outer lane, a plurality of gas pockets (612) have been seted up to sealing ring (61) inner wall, gas pocket (612) and annular (611) intercommunication, be equipped with on forced air cooling encircles (5) and be used for driving sealing ring (61) pivoted driving piece (7).

6. The cooling apparatus of a plastic pellet twin-screw extruder as claimed in claim 5, wherein: the driving piece (7) comprises a servo motor (71) and a bevel gear (711), the bevel gear (711) is coaxially fixed on a motor shaft of the servo motor (71), and one end of the sealing ring (61) is provided with a bevel gear ring (72) meshed with the bevel gear (711).

7. The cooling apparatus of a plastic pellet twin-screw extruder as claimed in claim 6, wherein: air-cooled ring (5) include first crown plate (51) and second crown plate (52), second crown plate (52) are equipped with two and distribute in the both sides of first crown plate (51), first crown plate (51) are connected through screw and second crown plate (52), two second crown plate (52) all are equipped with annular spacing bead (53) in relative one side, supply spacing bead (53) male spacing groove (54) are seted up to sealing ring (61) lateral wall.

8. The cooling apparatus of a plastic pellet twin-screw extruder as claimed in claim 7, wherein: the both sides of sealing ring (61) periphery wall at annular groove (611) all are equipped with annular elastic sealing pad (55), seal groove (56) that supply elastic sealing pad (55) embedding are seted up to first crown plate (51) inside wall.

9. The cooling apparatus of a plastic pellet twin-screw extruder as claimed in claim 5, wherein: guide wheels (8) are arranged on the bent frames (13) on two sides of the air cooling ring (5).

10. A cooling apparatus of a plastic pellet twin-screw extruder as claimed in claim 1, wherein: the side wall of the water tank (11) is provided with an exhaust pipe (111), one end of the exhaust pipe (111) is communicated with a high-pressure air source, and the other end of the exhaust pipe extends into the water tank (11).