A blow molding device for producing environmentally friendly plastic packaging bags

Abstract

The present invention relates to the field of plastic processing technology, specifically to an environmentally friendly plastic packaging bag production blow molding device, including a frame; a blow molding machine; a movable sleeve cooling device, including a track; a liftable air duct; an air cooling device; a spiral cooling tube warehouse; and a driving device. The present invention can avoid the problem of deformation of the plastic bag just after blow molding through the windless cooling method of the spiral cooling tube warehouse, and can achieve the effect of rapid and stable heat absorption and cooling by using the gas circulating in the spiral cooling tube warehouse. The air cooling device performs air cooling synchronously when controlling the cold air circulation, and uses air cooling to achieve the effect of secondary cooling of the plastic bag, thereby achieving the effect of fully cooling the plastic bag, thereby avoiding the problem of the long cooling path required for the plastic bag due to the traditional cooling method, reducing the overall cooling height of the blow molding device, thereby achieving the effect of reducing the occupied space, and at the same time can increase the cooling rate, thereby improving the overall work efficiency of the blow molding.

Description

Technical Field

[0001] The invention relates to the technical field of plastic processing, in particular to a blow molding device for producing environmentally friendly plastic packaging bags. Background Art

[0002] During use of the existing blow molding device, the material is plasticized and extruded into the blow molding machine through a screw rod. The blow molding machine inflates and pulls the plastic upward through the top opening, and an air ring is set on the plastic blowing path to cool the plastic. Then, a traction mechanism is used to clamp and convey the plastic bag. An actual blow molding factory shows that in order to ensure sufficient cooling of the plastic bag, a cooling ring with a long path needs to be set on the blow molding machine, and the corresponding traction mechanism needs to be set at a high place, resulting in the problem of a large cooling space occupied by the plastic bag during blow molding, which in turn affects the cooling rate of the plastic bag during blow molding.

[0003] Moreover, the traditional air ring not only has a poor cooling effect on the plastic bags during blow molding, but also because of its open state, the surface of the newly blown plastic bags is easily exposed to impurities in the air, which then causes the impurities to stick to the surface of the plastic bags and affect the quality of the subsequent plastic bag products. In view of this, we propose an environmentally friendly plastic packaging bag production blow molding device. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention provides a blow molding device for producing environmentally friendly plastic packaging bags, which solves the problems raised in the above background technology. To achieve the above purpose, the present invention is implemented through the following technical solutions: an environmentally friendly plastic packaging bag production blow molding device, including a frame; a blow molding machine, the blow molding machine is installed on the frame and is used to blow-mold plastic bags; a movable sleeve cooling device, the movable sleeve cooling device is arranged on the frame, the bottom end of the movable sleeve cooling device is docked with the top end of the blow molding machine, the movable sleeve cooling device includes a track, the track is fixedly installed on the frame, a liftable air duct is slidably connected in the track, the liftable air duct is provided with an air cooling device inside, and the bottom end of the liftable air duct is fixedly connected with a spiral cooling pipe bin; a driving device, the driving device is arranged on the frame and is used to drive the movable sleeve cooling device to perform lifting and translation.

[0005] Preferably, the spiral cooling pipe bin is composed of a spiral pipe and a cooling cylinder, and a cavity for cold air circulation is provided inside the spiral pipe.

[0006] Preferably, the air cooling device includes an active motor, the end of which is installed on a liftable air cylinder, and a cold air circulation device and a driving magnetic ring are respectively arranged on the output shaft of the active motor. The driving magnetic ring has a passive magnetic ring for magnetic transmission, and the inner ring of the passive magnetic ring is fixedly connected to an annular cover tube, and the interior of the annular cover tube is rotatably connected to a strip fan, and the top of the strip fan is fixedly connected to a self-rotating gear, and the surface of the self-rotating gear is meshed with a fixed gear ring.

[0007] Preferably, the passive magnetic ring and the annular cover cylinder are both rotatably connected to the interior of the liftable air cylinder, and the outer ring surface of the fixed gear ring is fixedly connected to the inner wall of the liftable air cylinder.

[0008] Preferably, the driving magnetic ring and the passive magnetic ring are both provided with a plurality of magnets with positive and negative poles alternately arranged in a circular array.

[0009] Preferably, the cold air circulation device includes a driving wheel, the interior of the driving wheel is clamped on the output shaft of the driving motor, the surface of the driving wheel is connected to the auxiliary wheel through a conveyor belt transmission, the bottom end of the auxiliary wheel is fixedly connected to a key shaft, the surface of the key shaft is slidably connected to a reciprocating screw, the surface of the reciprocating screw is slidably connected to a ball slide, the bottom end of the ball slide is fixedly connected to a refrigeration base, a semiconductor refrigerator is installed inside the refrigeration base, the internal piston of the refrigeration base is connected to an air pressure plate, the refrigeration base is fixedly connected to a pressure replenishing bin through a one-way air inlet pipe, and the bottom of the refrigeration base is fixedly connected to a one-way air outlet pipe.

[0010] Preferably, the end of the secondary driving wheel is rotatably connected to the liftable air duct, the bottom end of the reciprocating screw is rotatably connected to the air pressure plate, and the surface of the reciprocating screw is slidably connected to the top of the refrigeration base, the surface of the pressure compensating bin is fixedly connected to the liftable air duct, the interior of the pressure compensating bin is connected to the interior of the spiral cooling tube bin through a connecting pipe, and the bottom end of the one-way air outlet pipe is connected to the interior of the spiral cooling tube bin.

[0011] Preferably, the interior of the pressure-compensating bin is elastically connected to a give-way plate via a spring, the surface of the give-way plate is fixedly connected to an annular brush seat via a connecting rod, the surface of the connecting rod is slidably connected to the top of the pressure-compensating bin, the annular brush seat is sleeved on a liftable air cylinder, the liftable air cylinder is provided with a ventilation groove at the sliding position of the annular brush seat, and a filter is provided on the ventilation groove.

[0012] Preferably, the liftable hair cylinder includes a cylinder seat, an adjusting rod is threadedly connected to the cylinder seat, a passive gear is fixedly connected to the surface of the adjusting rod, sliders are rotatably connected to the two ends of the adjusting rod, the surface of the slider is slidably connected to the track, a side seat is fixedly connected to the surface of the cylinder seat, an arm rod is slidably connected to the inside of the side seat, the end of the arm rod is fixedly connected to a rotating gear shaft, the surface of the rotating gear shaft is elastically connected to a connecting seat via a torsion spring, and the end of the connecting seat is fixedly connected to the frame.

[0013] Preferably, the driving device includes a control motor, the end of which is mounted on a frame, a screw is clamped on the output shaft of the control motor, the surface of the screw is threadedly connected to a rack sleeve, the surface of the screw is rotatably connected to the frame, the surface of the rack sleeve is slidably connected to a connecting seat, and the rack sleeve is respectively provided with lifting and lowering control teeth and transverse movement control teeth, and the surface of the lifting and lowering control teeth is meshed with the surface of the passive gear.

[0014] It can be seen from the above technical solutions that the blow molding device for producing environmentally friendly plastic packaging bags provided in the embodiments of this specification has at least the following beneficial effects:

[0015] (1) The present invention can avoid the problem of deformation of plastic bags just after blow molding by using a windless cooling method of the spiral cooling tube bin. The gas circulating in the spiral cooling tube bin can achieve the effect of rapid and stable heat absorption and cooling. The air cooling device controls the air cooling in the liftable air duct while controlling the cold air circulation in the spiral cooling tube bin. The air cooling is used to achieve the effect of secondary cooling of the plastic bags, thereby achieving the effect of fully cooling the plastic bags, thereby avoiding the problem of the long cooling path required for the plastic bags caused by the traditional cooling method, reducing the overall cooling height of the blow molding device, thereby achieving the effect of reducing the occupied space, and at the same time can increase the cooling rate, thereby improving the overall work efficiency of the blow molding.

[0016] (2) The present invention drives the driving magnetic ring to drive the annular cover tube on the passive magnetic ring to rotate as a whole through the active motor. During the revolution of the annular cover tube, the strip fan realizes the effect of self-rotation through the meshing effect of the self-rotating gear and the fixed gear ring. During the self-rotation and revolution, the strip fan realizes the effect of uniform wind blowing around the plastic bag, thereby achieving the effect of uniform cooling of the surface of the plastic bag. The enclosed air cooling of the plastic bag can not only realize the comprehensive cooling of the plastic bag without dead angles, but also further avoid the problem of deformation of the plastic bag due to the relatively soft state of the plastic bag when it is just blown.

[0017] (3) The present invention replenishes gas from the one-way air inlet pipe through the refrigeration base, and the semiconductor refrigerator cools it. The cooled gas will be squeezed out of the one-way air outlet pipe by the air pressure plate. The one-way air outlet pipe replenishes the continuously cooled gas into the bottom end of the spiral cooling pipe bin, and the replenished gas is then replenished into the pressure replenishing bin from the top of the spiral cooling pipe bin through the connection of the pipe, and is cooled again by the refrigeration base. The continuously cooled circulating gas achieves the effect of contactless cooling of the plastic bag in the spiral cooling pipe bin, and achieves the effect of ring-type and closed cooling of the plastic bag just after inflating, so as to avoid the problem of deformation of the plastic bag just after blow molding. At the same time, the use of the enclosed cover type auxiliary cooling can further reduce the contact between external impurities and the plastic bag, and then reduce the problem of impurities in the environment penetrating into the liftable air duct and adsorbing on the plastic bag to affect the quality of the finished product.

[0018] (4) The present invention uses ventilation slots and filter screens to filter the air flowing inside the liftable air duct, further preventing impurities from entering the duct and being adsorbed on the plastic bag. At the same time, the up-and-down moving plate can drive the annular brush seat to brush the filter screen back and forth through the connecting rod, thereby avoiding the problem of filter screen blockage, ensuring effective ventilation of the filter screen, and allowing the airflow generated by the strip fan to flow through the ventilation slots when it rotates, thereby reducing the problem of gas entering from the top of the liftable air duct and affecting the plastic bag.

[0019] (5) The present invention can realize the effect of disassembling the blow molding machine by driving the lifting and lowering wind cylinder as a whole to move upward and then horizontally. Similarly, the control motor can be used to control the rack sleeve to move and reset. During the reset period, the overall reset and horizontal movement of the cylinder seat and the installation work of the reset and lowering docking can be realized in turn. The automated disassembly and installation method can facilitate the user to inspect and repair the blow molding end of the blow molding machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application:

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the internal structure of the frame in the present invention;

[0023] Figure 3 It is a schematic diagram of the internal structure of the liftable air duct in the present invention;

[0024] Figure 4 It is a structural schematic diagram of the passive magnetic ring in the present invention;

[0025] Figure 5 It is a structural schematic diagram of the annular cover cylinder in the present invention;

[0026] Figure 6 It is a structural schematic diagram of the strip fan in the present invention;

[0027] Figure 7 It is a schematic diagram of the structure of the cold air circulation device in the present invention;

[0028] Figure 8 This is a schematic diagram of the internal structure of the refrigeration base in the present invention;

[0029] Fig. 9 It is a schematic diagram of the structure of the liftable air duct in the present invention;

[0030] Fig.10 It is a schematic diagram of the structure of the refrigeration base in the present invention.

[0031] In the figure: 1, frame; 2, blow molding machine; 3, movable sleeve cooling device; 31, track; 32, liftable air cylinder; 321, cylinder seat; 322, adjustment rod; 323, passive gear; 324, slider; 325, side seat; 326, arm; 327, rotating gear shaft; 328, connecting seat; 33, air cooling device; 331, active motor; 332, driving magnetic ring; 333, passive magnetic ring; 334, annular cover cylinder; 335, strip fan; 336, self-rotating gear; 337, fixed gear ring; 34, spiral cooling pipe warehouse; 341, spiral pipe; 3 42. Cooling cylinder; 35. Cold air circulation device; 351. Driving wheel; 352. Auxiliary driving wheel; 353. Key shaft; 354. Reciprocating screw; 355. Ball bearing slide; 356. Refrigeration base; 357. Semiconductor refrigerator; 358. Air pressure plate; 359. One-way air inlet pipe; 360. Pressure replenishing chamber; 361. One-way air outlet pipe; 362. Give way plate; 363. Connecting rod; 364. Annular brush holder; 365. Ventilation slot; 4. Driving device; 41. Control motor; 42. Screw; 43. Rack sleeve; 44. Lifting and lowering control teeth; 45. Transverse movement control teeth. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0033] Example

[0034] See also Figure 1 - Fig.10As shown, an environmentally friendly plastic packaging bag production blow molding device includes a frame 1; a blow molding machine 2, which is installed on the frame 1 and is used to blow-mold plastic bags. The blow molding machine 2 is externally connected to a spiral feeder. After the material is plasticized, it is extruded into the blow molding machine 2 through a spiral rod in the spiral feeder. The blow molding machine 2 inflates and pulls the plastic upward through the top opening. The plastic bag is continuously transported upward under the influence of the pulling mechanism. The pulling mechanism is a commonly used mechanism in the existing plastic bag blow molding production line, and is mainly used to pull the plastic bag; a movable jacket cooling device 3, which is arranged on the frame 1, and the bottom of the movable jacket cooling device 3 The end is docked with the top end of the blow molding machine 2, the movable sleeve cooling device 3 includes a plurality of tracks 31, the plurality of tracks 31 are fixedly installed on the frame 1, a liftable air cylinder 32 is slidably connected inside the plurality of tracks 31, an air cooling device 33 is arranged inside the liftable air cylinder 32, and a spiral cooling pipe bin 34 is fixedly connected to the bottom end of the liftable air cylinder 32; the spiral cooling pipe bin 34 is composed of a spiral tube 341 and a cooling cylinder 342, the cooling cylinder 342 is a metal sheet cylinder embedded in the surface of the spiral tube 341, and is mainly used to seal the gap of the spiral tube 341 to achieve the effect of closed cooling of the plastic bag, and then In order to avoid the problem that the surface of the newly blown plastic bag contacts with impurities in the air and affects its quality, a cavity for cold air circulation is provided inside the spiral tube 341. During the upward blowing and transportation, the cold air that continuously circulates inside the spiral cooling tube warehouse 34 can achieve a circular and closed cooling effect on the newly blown plastic bag. At this time, the plastic bag may have an unstable surface shape because it has just been blown. The windless cooling method of the spiral cooling tube warehouse 34 can avoid the deformation of the newly blown plastic bag. The gas circulating in the spiral cooling tube warehouse 34 can achieve a rapid and stable heat absorption and cooling effect. As a result, the plastic bag just blown is initially cooled by the spiral cooling tube bin 34 and then transported to the liftable wind tube 32. The air cooling device 33 controls the air cooling in the liftable wind tube 32 while controlling the cold air circulation in the spiral cooling tube bin 34. The air cooling is used to achieve the effect of secondary cooling of the plastic bag. By fully cooling the plastic bag, the effect of rapid cooling is achieved, thereby avoiding the problem of the long cooling path required for the plastic bag caused by the traditional cooling method, reducing the overall cooling height of the blow molding device, thereby achieving the effect of reducing the occupied space, and at the same time being able to increase the cooling rate, thereby improving the overall work efficiency of the blow molding. The driving device 4 is arranged on the frame 1, and is used to drive the movable sleeve cooling device 3 to perform lifting and translation.

[0035] In this embodiment, the air cooling device 33 includes an active motor 331, the end of which is installed on the liftable wind tube 32, and the output shaft of the active motor 331 is respectively provided with a cold air circulation device 35 and a driving magnetic ring 332, and the driving magnetic ring 332 has a passive magnetic ring 333 for magnetic transmission, and a plurality of magnets with positive and negative poles staggered are distributed in a circular array on the driving magnetic ring 332 and the passive magnetic ring 333, and the driving magnetic ring 332 located outside the liftable wind tube 32 can use magnetic force to drive the passive magnetic ring 333 in the liftable wind tube 32 to rotate, which ensures that On the one hand, the transmission of force can be achieved, and on the other hand, the effect of contactless transmission can be achieved, thereby ensuring the closedness of the liftable air cylinder 32, reducing the problem that impurities in the environment penetrate into the liftable air cylinder 32 and are adsorbed on the plastic bag to affect the quality of the finished product. The inner ring of the passive magnetic ring 333 is fixedly connected with an annular cover cylinder 334, and the passive magnetic ring 333 and the annular cover cylinder 334 are both rotatably connected to the inside of the liftable air cylinder 32. A plurality of rotatably connected strip fans 335 are distributed in a circular array inside the annular cover cylinder 334, and the top of each strip fan 335 is fixedly connected with a self-rotating gear 336 (such as Figure 6 As shown in the figure, the surface of the self-rotating gear 336 is meshed with a fixed gear ring 337, and the outer ring surface of the fixed gear ring 337 is fixedly connected to the inner wall of the liftable wind cylinder 32. When each self-rotating gear 336 revolves with the strip fan 335 and the annular cover cylinder 334, since the fixed gear ring 337 is in a state of being fixed inside the liftable wind cylinder 32, the meshing revolving self-rotating gear 336 will rotate accordingly, and the output shaft of the active motor 331 drives the annular cover cylinder 334 on the passive magnetic ring 333 to rotate as a whole through the driving magnetic ring 332. A plurality of strip fans 335 are distributed in a circular array inside the annular cover cylinder 334. When the annular cover cylinder 334 revolves, the strip fan 335 achieves the effect of self-rotation through the meshing effect of the self-rotating gear 336 and the fixed gear ring 337. During the self-rotation and revolution, the strip fan 335 achieves the effect of uniform wind blowing around the plastic bag, thereby achieving the effect of uniform cooling of the surface of the plastic bag. Wrapping the plastic bags in a closed air-cooling mode can not only achieve comprehensive cooling of the plastic bags without dead angles, but also further avoid the problem of the plastic bags being easily deformed by wind in a relatively soft state when they are just blown because the plastic bags are cooled again.

[0036] Furthermore, the cold air circulation device 35 includes a driving wheel 351, the interior of the driving wheel 351 is clamped on the output shaft of the driving motor 331, the surface of the driving wheel 351 is connected to the auxiliary driving wheel 352 through a conveyor belt transmission, the bottom end of the auxiliary driving wheel 352 is fixedly connected to a key shaft 353, the surface of the key shaft 353 is slidably connected to a reciprocating screw rod 354, the surface of the reciprocating screw rod 354 is slidably connected to a ball slide 355, the reciprocating screw rod 354 is provided with a wire groove, and a fixed ball is arranged in the ball slide 355, and the ball is located at the wire groove. When the ball slide 355 is in a fixed state, the rotating reciprocating screw 354 moves up and down in the ball slide 355. The bottom end of the ball slide 355 is fixedly connected to a cooling base 356. A semiconductor refrigerator 357 is installed inside the cooling base 356. The internal piston of the cooling base 356 is connected to a gas pressure plate 358. The cooling base 356 is located in the sliding area of ​​the gas pressure plate 358 to set a closed space, and the space below the gas pressure plate 358 is set as a sealed cavity. When the gas pressure plate 358 is in a fixed state, the reciprocating screw 354 moves up and down in the ball slide 355. The bottom end of the ball slide 355 is fixedly connected to a cooling base 356. A semiconductor refrigerator 357 is installed inside the cooling base 356. The internal piston of the cooling base 356 is connected to a gas pressure plate 358. The cooling base 356 is located in the sliding area of ​​the gas pressure plate 358 to set a closed space, and the space below the gas pressure plate 358 is set as a sealed cavity. When the reciprocating motion of the reciprocating screw 354 is performed, the force of the motion is used to generate air pressure, the bottom end of the reciprocating screw rod 354 is rotatably connected to the air pressure plate 358, and the surface of the reciprocating screw rod 354 is slidably connected to the top of the refrigeration base 356, the refrigeration base 356 is fixedly connected to the pressure replenishing bin 360 through the one-way air inlet pipe 359, the end of the auxiliary driving wheel 352 is rotatably connected to the liftable air cylinder 32, and the surface of the pressure replenishing bin 360 is fixedly connected to the liftable air cylinder 32. Since the refrigeration base 356 is fixed to the liftable air cylinder 32 as a whole together with the pressure replenishing bin 360 as a whole, the refrigeration base 356 is fixed to the liftable air cylinder 32. The lifting type air cylinder 32 is on the lifting type air cylinder 32, and the ball slide 355 is fixedly rotated on the refrigeration base 356, so when the key shaft 353 drives the reciprocating screw 354 to rotate, the reciprocating screw 354 uses the thread groove on it and the ball fixed in the ball slide 355 to slide up and down on the key shaft 353, that is, the reciprocating screw 354 continuously reciprocates up and down in the ball slide 355, and rotates synchronously with the key shaft 353 during the up and down movement, and the bottom of the refrigeration base 356 is fixedly connected with a one-way air outlet pipe 361. The interior of the pressure replenishing bin 360 is connected to the top of the spiral cooling pipe bin 34 through a connecting pipe, which is used to connect the pressure replenishing bin 360 with the spiral cooling pipe bin 34, and the bottom end of the one-way air outlet pipe 361 is connected to the bottom end of the spiral cooling pipe bin 34, which is used to communicate with the spiral cooling pipe bin 34. The refrigeration base 356 is supplied with gas from the one-way air inlet pipe 359 . The supplied gas is cooled in the sealed cavity by the semiconductor refrigerator 357 . The cooled gas is squeezed out of the one-way air outlet pipe 361 by the air pressure plate 358 .The one-way air outlet pipe 361 replenishes the cooled gas into the bottom end of the spiral cooling tube bin 34, and the gas continuously replenished from the bottom end will be spirally transported to the top of the spiral cooling tube bin 34, and then replenished into the pressure replenishing bin 360 from the top of the spiral cooling tube bin 34 through the connecting pipe, and then absorbed by the negative pressure of the one-way air inlet pipe 359 into the refrigeration base 356 for further circulation cooling. The continuously cooled circulating gas achieves a contactless cooling effect on the plastic bag in the spiral cooling tube bin 34, and achieves a ring-type and closed cooling effect on the plastic bag that has just been inflated, so as to avoid the deformation of the plastic bag that has just been blown. At the same time, the use of the enclosed hood-type auxiliary cooling can further reduce the contact between external impurities and the plastic bag, and then reduce the problem of impurities in the environment penetrating into the liftable wind tube 32 and adsorbing on the plastic bag to affect the quality of the finished product.

[0037] Furthermore, the interior of the pressure replenishing chamber 360 is elastically connected with a giving plate 362 through a spring, a one-way air outlet pipe 361 is provided with a one-way valve to control the gas to only go out but not go in, and a one-way air inlet pipe 359 is provided with a one-way valve to control the gas to only go in but not go out. Therefore, when the air pressure plate 358 is downward, the air pressure plate 358 squeezes the sealed gas in the refrigeration base 356, and the gas is discharged through the one-way air outlet pipe 361. At this time, the refrigeration base 356 in the squeezed state cannot be replenished with gas through the one-way air inlet pipe 359, and the top of the spiral cooling pipe chamber 34 is discharging gas, and the discharged gas enters the pressure replenishing chamber 360 and cannot be replenished into the refrigeration base 356. At this time, the pressure replenishing chamber 360 The yield plate 362 in the pressure replenishing chamber 360 automatically yields pressure, and the air pressure drives the yield plate 362 to move upward in the pressure replenishing chamber 360 until the air pressure plate 358 moves upward. The yield plate 362 uses its upper elastic force to realize pressure reset, and drives the gas in the pressure replenishing chamber 360 to replenish the refrigeration base 356 for cooling, so as to realize the effect of circulating refrigeration. The surface of the yield plate 362 is fixedly connected with an annular brush seat 364 through a connecting rod 363. The surface of the connecting rod 363 is slidably connected to the top of the pressure replenishing chamber 360. The annular brush seat 364 is sleeved on the liftable air cylinder 32. The liftable air cylinder 32 is provided with a ventilation groove 365 (such as Figure 4 As shown), and a filter is provided on the ventilation slot 365. The ventilation slot 365 and the filter provided on the liftable air cylinder 32 are used to filter the air circulating inside the liftable air cylinder 32, further preventing impurities from entering the liftable air cylinder 32 and adsorbing on the plastic bag. At the same time, the up-and-down moving plate 362 can drive the annular brush seat 364 to brush the filter back and forth through the connecting rod 363, thereby avoiding the problem of filter blockage, ensuring effective ventilation of the filter, and enabling the airflow generated by the strip fan 335 when rotating to flow through the ventilation slot 365, thereby reducing the problem of gas entering from the top of the liftable air cylinder 32 and affecting the plastic bag.

[0038] In addition, the liftable wind cylinder 32 includes a cylinder seat 321, an adjusting rod 322 is threadedly connected to the cylinder seat 321, a passive gear 323 is fixedly connected to the surface of the adjusting rod 322, sliders 324 are rotatably connected to the two ends of the adjusting rod 322, the surface of the slider 324 is slidably connected to the track 31, a side seat 325 is fixedly connected to the surface of the cylinder seat 321, an arm 326 is slidably connected to the inside of the side seat 325, and a rotating gear shaft 327 is fixedly connected to the end of the arm 326. On the rod 322, the adjusting rod 322 is relatively fixed between the upper and lower sets of tracks 31 through the slider 324. Therefore, when the passive gear 323 drives the adjusting rod 322 to rotate, due to the restriction that the cylinder seat 321 cannot rotate, the cylinder seat 321 as a whole drives the spiral cooling tube bin 34 to move upward as a whole, and then the cylinder seat 321 as a whole drives the spiral cooling tube bin 34 to be separated from the docking state with the blow molding machine 2. The surface of the rotating gear shaft 327 is elastically connected to the connecting seat 328 through a torsion spring, and the end of the connecting seat 328 is fixedly connected to the frame 1.

[0039] In addition, the driving device 4 includes a control motor 41, the end of which is mounted on the frame 1, a screw 42 is clamped on the output shaft of the control motor 41, and a rack sleeve 43 is threadedly connected to the surface of the screw 42. The surface of the screw 42 is rotatably connected to the frame 1, and the surface of the rack sleeve 43 is slidably connected to the connecting seat 328, and the rack sleeve 43 is respectively provided with lifting and lowering control teeth 44 and transverse movement control teeth 45, and the surface of the lifting and lowering control teeth 44 is meshed with the surface of the passive gear 323. The control motor 41 drives the screw 42 to rotate through the output shaft, and drives the rack sleeve 43, which is limited to only move in a straight line, to move. During the movement of the rack sleeve 43, the lifting and lowering control teeth 44 on it first mesh and drive the passive gear 323 to rotate. Since a torsion spring is provided on the rotating gear shaft 327, the force driving the passive gear 323 to rotate when the lifting and lowering control teeth 44 move is set to be less than the torsion spring elastic force, so when the lifting and lowering control teeth 44 mesh with the passive gear 323, the gear 323 is driven to rotate. When the gear 323 is turned, the rotating gear shaft 327 will not be rotated by the force. At this time, the cylinder seat 321 as a whole will not be affected by the external force to move laterally. Instead, when the passive gear 323 drives the adjusting rod 322 to rotate, the cylinder seat 321 as a whole drives the spiral cooling tube warehouse 34 as a whole to move upward. After moving upward, the lifting and regulating teeth 44 lose engagement with the passive gear 323, and the transverse movement regulating teeth 45 mesh and drive the rotating gear shaft 327 to break through the elastic force of the torsion spring to rotate. During the rotation, the rotating gear shaft 327 drives the cylinder seat 321 on the side seat 325 to move laterally as a whole through the arm rod 326, thereby achieving the effect of disassembling from the blow molding machine 2. Similarly, the control motor 41 can be used again to control the rack sleeve 43 to move and reset. During the reset period, the overall reset and transverse movement of the cylinder seat 321 and the installation work of docking with the reset and lowering can be realized in turn. The automated disassembly and installation method can facilitate the user to inspect and repair the blow molding end of the blow molding machine 2.

[0040] When the environmentally friendly plastic packaging bag production blow molding device of the present invention is in use, the blow molding machine 2 is externally connected to a spiral feeder, and the material is plasticized and extruded into the blow molding machine 2 through the spiral rod in the spiral feeder. The blow molding machine 2 blows and pulls the plastic upward through the top opening, and the plastic bag is continuously transported upward under the influence of the traction mechanism. During the upward blowing and transportation, the cold air that continuously circulates inside the spiral cooling pipe bin 34 can achieve a ring-shaped and closed cooling effect on the plastic bag that has just been blown. At this time, the surface shape of the plastic bag may be changed due to the fact that the blow molding has just been completed. There is instability. The windless cooling method of the spiral cooling tube warehouse 34 can avoid the deformation of the plastic bags just after blow molding. The gas circulating in the spiral cooling tube warehouse 34 can achieve the effect of rapid and stable heat absorption and cooling. After the plastic bags just after blow molding are initially cooled by the spiral cooling tube warehouse 34, they will be transported to the liftable wind duct 32. The air cooling device 33 controls the air cooling in the liftable wind duct 32 while controlling the cold air circulation in the spiral cooling tube warehouse 34, so as to achieve the effect of secondary cooling of the plastic bags by air cooling. When the air cooling device 33 is started, on the one hand, the output shaft of the active motor 331 drives the annular cover tube 334 on the passive magnetic ring 333 to rotate as a whole through the driving magnetic ring 332, and a plurality of strip fans 335 are distributed in the internal circular array of the annular cover tube 334. During the revolution of the annular cover tube 334, the strip fans 335 achieve the effect of self-rotation through the meshing effect of the self-rotating gear 336 and the fixed gear ring 337. During the self-rotation and revolution, the strip fans 335 achieve the effect of uniform wind blowing around the plastic bag, thereby achieving the effect of uniform cooling of the surface of the plastic bag. On the other hand, the rotation of the active motor 331 will rotate through the active wheel 351 connected to its output shaft and the conveyor belt drive auxiliary wheel 352, and the auxiliary wheel 352 will drive the key shaft 353 to rotate synchronously. During the rotation, since the refrigeration base 356 and the pressure replenishing bin 360 are fixed on the liftable wind tube 32 as a whole, and the ball slide 355 is fixedly rotated on the refrigeration base 356, when the key shaft 353 drives the reciprocating screw 354 to rotate, the reciprocating screw 354 uses the influence of the wire groove thereon and the ball fixed in the ball slide 355 to slide downward on the key shaft 353, that is, the reciprocating screw 354 is continuously moved forward in the ball slide 355. The air pressure plate 358 moves up and down and rotates synchronously with the key shaft 353 during the up and down movement. The up and down movement of the reciprocating screw rod 354 can drive the air pressure plate 358 to move up and down in the refrigeration base 356. The refrigeration base 356 is located in the sliding area of ​​the air pressure plate 358 to set a closed space, and the space below the air pressure plate 358 is set as a sealed cavity. When the air pressure plate 358 moves back and forth, the moving force is used to generate air pressure to replenish gas from the one-way air inlet pipe 359. The replenished gas is cooled in the sealed cavity under the influence of the semiconductor refrigerator 357, and the cooled gas is squeezed out of the one-way air outlet pipe 361 by the air pressure plate 358.The one-way air outlet pipe 361 replenishes the continuously cooled gas into the bottom end of the spiral cooling tube bin 34, and the gas continuously replenished from the bottom end will be spirally transported to the top of the spiral cooling tube bin 34, and then replenished into the pressure replenishing bin 360 from the top of the spiral cooling tube bin 34 through the connection of the pipe, and then absorbed by the negative pressure of the one-way air inlet pipe 359 into the refrigeration base 356 for further circulation cooling. The continuously cooled circulating gas achieves a contactless cooling effect on the plastic bag in the spiral cooling tube bin 34, and achieves a ring-type, closed cooling effect on the plastic bag that has just been inflated, so as to avoid the deformation of the plastic bag that has just been blown. At the same time, the use of the enclosed hood-type auxiliary cooling can further reduce the contact between external impurities and the plastic bag, and then reduce the problem of impurities in the environment penetrating into the liftable wind tube 32 and adsorbing on the plastic bag to affect the quality of the finished product. Secondly, the ventilation slots 365 and the filter screen provided on the liftable air duct 32 are used to filter the gas circulating inside the liftable air duct 32, so as to further prevent impurities from entering therein and being adsorbed on the plastic bag. While the air pressure plate 358 is constantly moving up and down, a one-way air outlet pipe 361 is provided with a one-way valve to control the gas to only go out but not in, and a one-way air inlet pipe 359 is provided with a one-way valve to control the gas to only go in but not out. Therefore, when the air pressure plate 358 moves downward, the air pressure plate 358 squeezes the sealed gas in the refrigeration base 356, and the gas is discharged through the one-way air outlet pipe 361. At this time, the refrigeration base 356 in the squeezed state cannot be replenished with gas through the one-way air inlet pipe 359, and the top of the spiral cooling pipe bin 34 is discharging gas, and the discharged gas enters the pressure replenishing bin 360 and cannot be replenished into the refrigeration base 356, at this time, the yield plate 362 in the pressure replenishing chamber 360 automatically yields pressure, and the air pressure drives the yield plate 362 to move upward in the pressure replenishing chamber 360 until the air pressure plate 358 moves upward, at which time the yield plate 362 uses its elastic force to reset the pressure and drives the gas in the pressure replenishing chamber 360 to replenish the refrigeration base 356 for cooling, thereby achieving a circulating refrigeration effect. At the same time, the yield plate 362 that moves up and down can drive the annular brush seat 364 to brush and clean the filter screen back and forth through the connecting rod 363, thereby avoiding the problem of filter screen blockage and ensuring effective ventilation of the filter screen, allowing the airflow generated by the strip fan 335 when rotating to circulate from the ventilation slot 365, reducing the problem of gas entering from the top of the liftable wind tube 32 and then affecting the plastic bag.

[0041] The liftable air cylinder 32 is normally in a state of docking with the blow molding end of the blow molding machine 2. When the liftable air cylinder 32 needs to be disassembled, the operator drives the control motor 41 to work. The control motor 41 drives the screw 42 to rotate through the output shaft, and drives the rack sleeve 43 that is limited to only move in a straight line to move. During the movement of the rack sleeve 43, the lifting and regulating teeth 44 on it first mesh and drive the passive gear 323 to rotate. Since a torsion spring is provided on the rotating gear shaft 327, the force driving the passive gear 323 to rotate when the lifting and regulating teeth 44 move is set to be less than the torsion spring elastic force. Therefore, when the lifting and regulating teeth 44 mesh with the passive gear 323, the rotating gear shaft 327 will not be rotated by the action of force. At this time, the cylinder seat 321 as a whole will not be affected by external force to move laterally. Since the cylinder seat 321 is threadedly connected to the adjusting rod 322 as a whole, the adjusting rod 322 The slider 324 is relatively fixed between the upper and lower groups of tracks 31. Therefore, when the passive gear 323 drives the adjusting rod 322 to rotate, the cylinder seat 321 is restricted from rotating and the cylinder seat 321 as a whole drives the spiral cooling tube bin 34 to move upward as a whole. After moving upward, the transverse movement regulating teeth 45 mesh and drive the rotating gear shaft 327 to rotate by breaking through the elastic force of the torsion spring. During the rotation, the rotating gear shaft 327 drives the cylinder seat 321 on the side seat 325 to move horizontally as a whole through the arm rod 326, thereby achieving the effect of disassembly from the blow molding machine 2. Similarly, the control motor 41 can be used again to control the rack sleeve 43 to move and reset. During the reset period, the overall reset and transverse movement of the cylinder seat 321 and the installation work of docking with the reset descent can be realized in turn. The automated disassembly and installation method can facilitate the user to inspect and repair the blow molding end of the blow molding machine 2.

[0042] The above implementation methods are only used to illustrate the embodiments of the present invention, and are not limitations of the embodiments of the present invention. Ordinary technicians in the relevant technical field may make various changes and modifications without departing from the spirit and scope of the embodiments of the present invention. Therefore, all equivalent technical solutions also belong to the scope of the embodiments of the present invention. The patent protection scope of the embodiments of the present invention should be defined by the claims.

Claims

1. A blow molding device for producing environmentally friendly plastic packaging bags, characterized in that: include: Frame (1); A blow molding machine (2), the blow molding machine (2) being mounted on the frame (1) and being used for blow molding plastic bags; A movable sleeve cooling device (3), the movable sleeve cooling device (3) being arranged on a frame (1), the bottom end of the movable sleeve cooling device (3) being butted against the top end of the blow molding machine (2), the movable sleeve cooling device (3) comprising a track (31), the track (31) being fixedly mounted on the frame (1), a liftable air cylinder (32) being slidably connected inside the track (31), an air cooling device (33) being arranged inside the liftable air cylinder (32), and a spiral cooling pipe bin (34) being fixedly connected to the bottom end of the liftable air cylinder (32); A driving device (4), the driving device (4) being arranged on the frame (1) and used for driving the movable jacket cooling device (3) to perform lifting and translation operations; The air cooling device (33) comprises an active motor (331), the end of the active motor (331) is mounted on a liftable air cylinder (32), a cold air circulation device (35) and a driving magnetic ring (332) are respectively arranged on the output shaft of the active motor (331), the driving magnetic ring (332) is magnetically transmitted with a passive magnetic ring (333), the inner ring of the passive magnetic ring (333) is fixedly connected with an annular cover tube (334), the interior of the annular cover tube (334) is rotatably connected with a strip fan (335), the top end of the strip fan (335) is fixedly connected with a self-rotating gear (336), and the surface of the self-rotating gear (336) is meshed with a fixed gear ring (337); The cold air circulation device (35) comprises a driving wheel (351), the interior of the driving wheel (351) is clamped on the output shaft of the driving motor (331), the surface of the driving wheel (351) is connected to the auxiliary driving wheel (352) through a conveyor belt transmission, the bottom end of the auxiliary driving wheel (352) is fixedly connected to a key shaft (353), the surface of the key shaft (353) is slidably connected to a reciprocating screw (354), the surface of the reciprocating screw (354) is slidably connected to a ball slide (355), the bottom end of the ball slide (355) is fixedly connected to a refrigeration base (356), a semiconductor refrigerator (357) is installed inside the refrigeration base (356), the internal piston of the refrigeration base (356) is connected to an air pressure plate (358), the refrigeration base (356) is fixedly connected to a pressure replenishing bin (360) through a one-way air inlet pipe (359), and the bottom of the refrigeration base (356) is fixedly connected to a one-way air outlet pipe (361); The end of the secondary driving wheel (352) is rotatably connected to the liftable air cylinder (32), the bottom end of the reciprocating screw rod (354) is rotatably connected to the air pressure plate (358), and the surface of the reciprocating screw rod (354) is slidably connected to the top of the refrigeration base (356), the surface of the pressure replenishing bin (360) is fixedly connected to the liftable air cylinder (32), the interior of the pressure replenishing bin (360) is connected to the interior of the spiral cooling pipe bin (34) through a connecting pipe, and the bottom end of the one-way air outlet pipe (361) is connected to the interior of the spiral cooling pipe bin (34).

2. The blow molding device for producing environmentally friendly plastic packaging bags according to claim 1, characterized in that: The spiral cooling pipe bin (34) is composed of a spiral pipe (341) and a cooling cylinder (342), and a cavity for cold air to circulate is provided inside the spiral pipe (341).

3. The blow molding device for producing environmentally friendly plastic packaging bags according to claim 2, characterized in that: The passive magnetic ring (333) and the annular cover cylinder (334) are both rotatably connected to the interior of the liftable wind cylinder (32), and the outer ring surface of the fixed gear ring (337) is fixedly connected to the inner wall of the liftable wind cylinder (32).

4. The blow molding device for producing environmentally friendly plastic packaging bags according to claim 3, characterized in that: The driving magnetic ring (332) and the passive magnetic ring (333) are both provided with a plurality of magnets with positive and negative poles arranged alternately distributed in a circular array.

5. The blow molding device for producing environmentally friendly plastic packaging bags according to claim 4, characterized in that: The interior of the pressure replenishing bin (360) is elastically connected to a clearance plate (362) via a spring, the surface of the clearance plate (362) is fixedly connected to an annular brush seat (364) via a connecting rod (363), the surface of the connecting rod (363) is slidably connected to the top of the pressure replenishing bin (360), the annular brush seat (364) is sleeved on the liftable air cylinder (32), the liftable air cylinder (32) is provided with a ventilation groove (365) at the sliding position of the annular brush seat (364), and a filter is arranged on the ventilation groove (365).

6. The blow molding device for producing environmentally friendly plastic packaging bags according to claim 1, characterized in that: The liftable air cylinder (32) comprises a cylinder seat (321), an adjusting rod (322) being threadedly connected to the cylinder seat (321), a passive gear (323) being fixedly connected to the surface of the adjusting rod (322), sliders (324) being rotatably connected to the two ends of the adjusting rod (322), the surface of the slider (324) being slidably connected to the track (31), a side seat (325) being fixedly connected to the surface of the cylinder seat (321), an arm (326) being slidably connected inside the side seat (325), an end of the arm (326) being fixedly connected to a rotating gear shaft (327), a surface of the rotating gear shaft (327) being elastically connected to a connecting seat (328) via a torsion spring, and an end of the connecting seat (328) being fixedly connected to the frame (1).

7. The blow molding device for producing environmentally friendly plastic packaging bags according to claim 6, characterized in that: The driving device (4) comprises a control motor (41), the end of which is mounted on a frame (1), a screw rod (42) being clamped on an output shaft of the control motor (41), a surface of which is threadedly connected to a rack sleeve (43), the surface of which is rotatably connected to the frame (1), the surface of which is slidably connected to a connecting seat (328), and the rack sleeve (43) is respectively provided with lifting and lowering control teeth (44) and transverse movement control teeth (45), the surface of which is meshed with the surface of the passive gear (323).

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