CN220031170U - Cooling discharging device of plastic film blowing machine - Google Patents

Abstract

The utility model relates to a cooling discharging device of a plastic film blowing machine, which comprises cooling air rings horizontally arranged at the top ends of extrusion openings of blowing film heads, wherein a plurality of air inlet pipes communicated with the inside of the cooling air rings are fixedly connected to the bottom sides of the cooling air rings, a plurality of connecting rods are circumferentially and equidistantly arranged at the top sides of the cooling air rings, one end of each connecting rod is hinged with the top sides of the cooling air rings, one end of each connecting rod, which is far away from the cooling air rings, is hinged with a vertically arranged cooling air channel, a corrugated hose is arranged between each cooling air channel and each cooling air ring, the corrugated hose is communicated with the cooling air rings, an air outlet hole is formed in the part, facing the center, of each cooling air channel, an adjusting mechanism used for adjusting the circumferential radius of the cooling air channel is arranged on the cooling air ring, guide assemblies are hinged at the top ends of the plurality of the cooling air channels, and one ends, which are far away from the cooling air channels, of the guide assemblies are arranged close to rollers. The utility model has the effects of realizing flexible adjustment of the size of the cooling device of the film blowing machine and ensuring the production quality of plastic films.

Description

Cooling discharging device of plastic film blowing machine

Technical Field

The utility model relates to the field of plastic film blowing machines, in particular to a cooling and discharging device of a plastic film blowing machine.

Background

The plastic film blowing machine is one of the important equipment in packaging industry and is used for producing plastic films, which adopts plastic particles such as polyethylene, polypropylene and the like as raw materials, and the plastic films with various specifications and thicknesses are produced through the processes of heating, melting, extruding, stretching and the like. The working process of the plastic film blowing machine generally comprises the following steps:

1. feeding and extruding: and (3) placing the plastic particles into a hopper of a film blowing machine, heating, melting and extruding the plastic particles to form a round or flat plastic tubular body.

2. And (3) membranization: the air blowing port injects air into the plastic tubular body to form a plastic film cylinder, the size and the dimension of the film are adjusted through the film extrusion port of the blow molding film head, and the plastic film cylinder is extruded from the blow molding film head.

3. Stretching and cutting: and cooling and shaping the extruded plastic film cylinder, stretching the plastic film cylinder to a certain thickness and flatness by a roller, and cutting and trimming to finally form a plastic film product meeting the requirements.

Because the process needs, the common device of inflation film manufacturing machine cooling design is connected with the film extrusion mouth laminating, and the plastic film section of thick bamboo that extrudes from the film extrusion mouth directly cools off through the cooling design device, and the cooling design generally adopts the air-dry mode, generally is the cooling wind ring, and the film extrusion mouth of blowing film head is cylindric generally. In the filming step, the radius of a film extrusion opening of a blown film head can be changed according to the size requirement of a plastic film, but a cooling device near the film extrusion opening of a common film blowing machine cannot be changed along with the film extrusion opening, so that after the radius of the film extrusion opening is adjusted, the distance between a cooling air ring and a plastic film cylinder is easy to be too large or too small, and further the plastic film cylinder with a larger size is blown with air more rapidly, and the plastic film cylinder with a smaller size is blown with air more slowly.

With respect to the related art described above, the inventors consider that the inability to adjust the distance between the cooling air ring and the plastic film tube will have a different effect on the quality of the plastic film tube.

Disclosure of Invention

In order to realize flexible adjustment of the size of a cooling device of a film blowing machine and ensure the production quality of plastic films, the utility model provides a cooling discharging device of the plastic film blowing machine.

The utility model provides a cooling discharging device of a plastic film blowing machine, which adopts the following technical scheme:

the utility model provides a plastics inflation film manufacturing machine's cooling discharging device, including the cooling wind ring of level setting on film extrusion mouth top, cooling wind ring bottom side rigid coupling has four air inlet ducts of intercommunication cooling wind ring inside, cooling wind ring top side circumference equidistant is provided with many connecting rods, every connecting rod one end all articulates with cooling wind ring top side, every connecting rod is kept away from the one end of cooling wind ring and all articulates there is the cooling wind channel of vertical setting, be provided with corrugated hose between every cooling wind channel and the cooling wind ring, corrugated hose communicates cooling wind channel and cooling wind ring, the air outlet has been seted up towards the part in center on every cooling wind channel, be provided with the guiding assembly that is used for adjusting cooling wind channel place circumference radius on the cooling wind ring, many cooling wind channel top articulates, guiding assembly's one end that keeps away from the cooling wind channel is close to the roller setting.

By adopting the technical scheme, the plastic film cylinder is extruded from the extrusion port and is sent between the cooling air channels, at the moment, the air inlet pipe sends cold air into the cooling air channel, the cold air in the cooling air channel is sent into the cooling air channel through the corrugated hose, and the cold air is uniformly sprayed onto the plastic film cylinder through the air outlet holes; the distance between each cooling air duct is adjusted by a worker through an adjusting device, the circumference of the cooling air duct is enlarged or reduced, and then the distance between the cooling air duct and the plastic film is adjusted; different plastic films need cooling air with different intensities, the radius of the circumference track where the cooling air duct is positioned is reasonably adjusted according to the material of the plastic films, if the distance between the cooling air duct and the plastic films is too small, the plastic films are too large in cooling, the surface temperature of the films is too fast reduced, the films shrink too fast, and strong air flow is added to easily cause the defects of folds, bubbles and the like of the films; if the distance between the cooling air duct and the plastic film is too large, the plastic film is too small in cooling, and the surface temperature of the film is reduced insufficiently. The shrinkage force is insufficient, and fuses appear on the surface of the film due to poor solution flow, so that the appearance and the use effect of the film are affected.

Optionally, the adjustment mechanism includes a displacement ring that sets up on many connecting rods, and the displacement groove that runs through the displacement ring is seted up to corresponding many connecting rods on the displacement ring, and a displacement groove is pegged graft respectively to every connecting rod, and the displacement ring diapire is provided with the guider that is used for controlling the displacement ring height.

By adopting the technical scheme, the height of the variable-pitch ring is changed by utilizing the guide device, when the height of the variable-pitch ring rises, the groove wall of each variable-pitch groove is abutted against and pushes the connecting rod in the groove, the connecting rod rotates upwards around the hinging point with the cooling air ring, the angle between the connecting rod and the top side surface of the cooling air ring is increased, the radius of the circumference where the cooling air channel at the top end of the connecting rod is driven to be reduced, and the distance reduction between the cooling air channel and the plastic film is realized; when the height of the variable-pitch ring descends, the groove wall of each variable-pitch groove supports the connecting rod to move downwards, the connecting rod rotates downwards around the hinge point of the connecting rod and the cooling air ring, the included angle between the connecting rod and the top side surface of the cooling air ring is reduced, the radius of the circumference of the cooling air channel at the top end of the connecting rod is driven to be increased, and the distance between the cooling air channel and the plastic film is increased.

Optionally, the guiding device comprises a threaded rod which is in threaded connection with the bottom wall of the variable-pitch ring, and the threaded rod is in threaded connection with the corresponding position of the side wall of the cooling air ring.

Through adopting above-mentioned technical scheme, the threaded rod is convenient for the workman manual regulation pitch-changing ring's height, and then adjusts the distance between cooling wind channel and the plastic film, and the staff upwards precesses or revolves the back threaded rod, and the threaded rod pushes away the pitch-changing ring and reciprocates or descend.

Optionally, the air outlet holes are distributed at equal intervals along the length direction of the cooling air duct, and the air outlet holes on each cooling air duct are all formed in the same position.

By adopting the technical scheme, the equally-spaced air outlet holes ensure that the cooling air flow is uniformly distributed, the cooling speed of any part of the film is ensured to be the same, and further the uniform distribution of the strength and toughness of the film is ensured.

Optionally, the guide assembly includes four guide bars that set up on many cooling air flue tops, and four guide bars same end is articulated with many cooling air flue top ball respectively, forms the discharge gate between the another same end of four guide bars, and four guide bars reduce towards the direction interval of keeping away from the cooling air flue, rotates between every two guide bars and is connected with many transversely setting telescopic links.

Through adopting above-mentioned technical scheme, the interval of guide bar bottom is great, as holding and guiding the entry of plastic film section of thick bamboo transmission direction, and the interval of guide bar reduces along with the height increase gradually, and the telescopic link butt plastic film section of thick bamboo is and the inside air discharge of plastic film section of thick bamboo gradually, presses it into film form along with the transportation of roller.

Optionally, the plurality of telescopic links all transversely set up, and the length direction equidistant distribution of a plurality of telescopic links along the guide bar.

Through adopting above-mentioned technical scheme, the compaction of plastic film section of thick bamboo mainly relies on the butt of telescopic link, and the equidistant telescopic link of distributing in the compaction process is favorable to the orderly discharge of plastic film section of thick bamboo gas, if the telescopic link uneven distribution will lead to gaseous part to pile up, is that the film surface appears the fold, influences the appearance quality and the result of use of product.

Optionally, the part that guide bar and cooling wind channel are connected is provided with the spacing subassembly of horizontal setting, and spacing subassembly is used for leading plastic film, keeps stable in the transportation of film, because plastic film does not have any fixed establishment in the part of cooling wind channel, if not in time carry out spacing and lead to plastic film's crooked distortion easily, can't guarantee to level and smooth at film extruded in-process.

Through adopting above-mentioned technical scheme, the main effect of spacing subassembly is to provide the transportation passageway that has the guide effect, prevents that the film from warp to fold and press.

Optionally, the limiting component comprises two limiting rods hinged between a plurality of opposite guide rods in sequence, and an included angle is formed between the two limiting rods.

Through adopting above-mentioned technical scheme, the contained angle that forms between two gag levers, the multiunit forms the effect that two gag levers of contained angle make up and play spacing, prevent that the plastic film section of thick bamboo from crooked, in addition, when the circumference radius that cooling duct place increases, two articulated gag levers angle increase, the through-hole chi footpath reduces, has strengthened the spacing effect to the plastic film section of thick bamboo of great radius, because the radius is bigger with the loose degree in proportion of plastic film section of thick bamboo, the increase of through-hole spacing effect has further reduced the possibility that the film was folded.

Drawings

Fig. 1 is a schematic overall structure of an embodiment of the present utility model.

Fig. 2 is a schematic view of a structure for highlighting the cooling air duct.

Fig. 3 is a schematic view of a structure for highlighting the guide bar.

Fig. 4 is a schematic view of a structure for highlighting the telescopic rod.

Reference numerals illustrate: 1. a plastic film blowing machine; 11. a blown film head; 12. an air inlet pipe; 2. a cooling air ring; 21. a connecting rod; 22. a cooling air duct; 221. an air outlet hole; 23. a corrugated hose; 24. a pitch-variable ring; 25. a variable-pitch groove; 26. a threaded rod; 27. a guide rod; 28. a fixed sleeve; 3. a guide rod; 31. a telescopic rod; 311. a rotating drum; 312. a rotating rod; 32. a chute; 33. a slide block; 34. and a limit rod.

Detailed Description

The utility model is described in further detail below with reference to fig. 1-4.

The embodiment of the utility model discloses a cooling discharging device of a plastic film blowing machine. Referring to fig. 1 and 2, a cooling discharging device of a plastic film blowing machine comprises a cooling air ring 2 fixedly connected to the top end of an extrusion opening of a blown film head 11, wherein the cooling air ring 2 is transversely arranged, a plurality of air inlet pipes 12 connected with the plastic film blowing machine 1 are fixedly connected to the bottom side of the cooling air ring 2, each air inlet pipe 12 is communicated with the inside of the cooling air ring 2, the plurality of air inlet pipes 12 are distributed at equal intervals along the circumferential direction of the cooling air ring 2, and fans corresponding to the air inlet pipes 12 are arranged on the plastic film blowing machine 1; eight connecting rods 21 are circumferentially arranged on the top side of the cooling air ring 2 at equal intervals, one end of each connecting rod 21 is in spherical hinge joint with the outer wall of the top side of the cooling air ring 2, one end of each connecting rod 21, which is far away from the cooling air ring 2, is hinged with a vertically arranged cooling air duct 22, each cooling air duct 22 is tubular, one end, which is close to the central shaft of the cooling air ring 2, of each cooling air duct 22 is provided with a plurality of air outlet holes 221, and the air outlet holes 221 are distributed at equal intervals along the length direction of the cooling air duct 22; a corrugated hose 23 is arranged between the cooling air duct 22 and the cooling air duct 2, one end of the corrugated hose 23 is fixedly connected with the cooling air duct 22, the other end of the corrugated hose 23 is connected with the cooling air duct 2, and the corrugated hose 23 is communicated with the cooling air duct 22 and the cooling air duct 2. The blowing port in the plastic film blowing machine 1 injects air into a molten plastic pipe, the plastic pipe expands into a plastic film cylinder, the plastic film cylinder continuously discharges from a blowing film head 11 and enters between eight cooling air channels 22, meanwhile, cold air of an air inlet pipe 12 is sent into a cooling air ring 2, the cold air is evenly distributed in the cooling air ring 2 and is input into the cooling air channels 22 through a corrugated hose 23, and the air outlet of the cooling air channel 22 evenly sends the internal cold air to the surface of the plastic film cylinder to cool and shape the molten semi-fluid plastic film cylinder.

Referring to fig. 2, a distance-changing ring 24 is horizontally arranged above the cooling air ring 2, the distance-changing ring 24 is arranged between the cooling air ring 2 and the cooling air duct 22, eight distance-changing grooves 25 are formed in the distance-changing ring 24 corresponding to eight connecting rods 21 in the circumferential direction, and the eight connecting rods 21 are respectively inserted into the eight distance-changing grooves 25; three guide rods 27 which are vertically arranged are fixedly connected to the outer bottom wall of the variable-pitch ring 24 near the edge, a threaded rod 26 which is vertically arranged is further connected to the outer bottom wall of the variable-pitch ring 24 near the edge in a threaded manner, nuts are connected to the bottom wall and the top wall of the variable-pitch ring 24 in a threaded manner, two nuts are attached to the surface of the variable-pitch ring 24, the three guide rods 27 are distributed at equal intervals in the circumferential direction of the threaded rod 26, four fixing sleeves 28 which correspond to the three guide rods 27 and the threaded rod 26 are fixedly connected to the side wall of the cooling air ring 2, the three guide rods 27 are inserted into the three fixing sleeves 28, and the threaded rod 26 is connected with the fixing sleeve 28 in a threaded manner. The guide rod 27 plays a guide role, a worker screws the threaded rod 26 upwards, the threaded rod 26 pushes the distance-changing ring 24 upwards, the height of the distance-changing ring 24 is increased, the distance-changing ring 24 is lifted to drive the plurality of connecting rods 21 in the distance-changing groove 25 to converge towards the center, the angle between the connecting rods 21 and the top side of the cooling air ring 2 is increased, so that eight cooling air channels 22 are close to the central shaft of the cooling air ring 2, and the distance between the cooling air channels 22 and the plastic film barrel is reduced; the threaded rod 26 is screwed downwards, the threaded rod 26 pulls the distance changing ring 24 downwards, the height of the distance changing ring 24 is reduced, the distance changing ring 24 reduces to drive the plurality of connecting rods 21 in the distance changing groove 25 to diffuse all around, the included angle between the connecting rods 21 and the top side of the cooling air ring 2 is reduced, so that eight cooling air channels 22 are far away from the central shaft of the cooling air ring 2, and the distance between the cooling air channels 22 and the plastic film cylinder is increased.

Referring to fig. 3 and 4, the top ends of four cooling air channels 22 distributed alternately in eight cooling air channels 22 are respectively and spherically hinged with guide rods 3 arranged obliquely, wherein one ends of two guide rods 3 far away from the cooling air channels 22 are inclined towards the directions of the other two guide rods 3, the four guide rods 3 are arranged in parallel in pairs, and one ends of the four guide rods 3 far away from the cooling air channels 22 form a discharge hole; a plurality of transversely arranged telescopic rods 31 are hinged between the two parallel guide rods 3, two ends of each telescopic rod 31 are hinged with the guide rods 3, and the telescopic rods 31 are distributed at equal intervals along the inclination direction of the guide rods 3; each telescopic rod 31 consists of a rotary drum 311 and two rotary rods 312 inserted at two ends of the rotary drum 311, and the rotary rods 312 are hinged with the guide rods 3; two sequentially hinged limiting rods 34 are arranged between the two parallel guide rods 3, opposite ends of the two limiting rods 34 are hinged, the other opposite ends of the two limiting rods 34 are respectively hinged to the two guide rods 3, and an included angle is formed between the two hinged limiting rods 34; two sides of the plastic film blowing machine 1 are respectively provided with a vertically arranged sliding groove 32 corresponding to the top ends of the four guide rods 3, each sliding groove 32 is slidably connected with a sliding block 33, and each sliding block 33 is respectively hinged with the top ends of the two guide rods 3 which are inclined relatively. The cooling air duct 22 moves towards the direction away from the plastic film cylinder, the cooling air duct 22 moves to drive the inclination angle of the guide rods 3 to be reduced, the sliding blocks 33 above the guide rods 3 move downwards due to the reduction of the inclination angle of the guide rods 3, the telescopic rods 31 hinged between the guide rods 3 are always kept horizontal in the process, the insertion mode of the rotating rods 312 and the rotating cylinders 311 can change the length according to the inclination of the guide rods 3, the radius of the circumference where the bottom ends of the guide rods 3 are positioned is increased, and the plastic film cylinder with a larger radius is accommodated; the cooling air duct 22 moves towards the direction close to the plastic film cylinder, the cooling air duct 22 moves to drive the inclination angle of the guide rod 3 to increase, the sliding block 33 above the guide rod 3 moves upwards due to the increase of the inclination angle of the guide rod 3, the radius of the circumference where the bottom end of the guide rod 3 is located is reduced, and the plastic film cylinder with smaller radius is accommodated; while the angle of the guide rod 3 is changed, the inclination angle of the guide rod 3 is changed, but the guide rod 3 is continuously kept parallel due to the fact that the ball hinge is in limiting position with the top end of the plastic film blowing machine 1 body to the guide rod 3, and the limiting rod 34 still plays a role in limiting the edge of the plastic film barrel.

The embodiment of the utility model relates to a cooling discharging device of a plastic film blowing machine, which comprises the following implementation principles: the blowing port in the plastic film blowing machine 1 injects air into a molten plastic pipe, the plastic pipe expands into a plastic film cylinder, the plastic film cylinder continuously discharges from a blowing film head 11 and enters between eight cooling air channels 22, meanwhile, cold air of an air inlet pipe 12 is sent into a cooling air ring 2, the cold air is evenly distributed in the cooling air ring 2 and is input into the cooling air channels 22 through a corrugated hose 23, and the air outlet of the cooling air channel 22 evenly sends the internal cold air to the surface of the plastic film cylinder to cool and shape the molten semi-fluid plastic film cylinder.

Taking the example of increasing the distance between the cooling air duct 22 and the plastic film tube as an example: the staff screws the threaded rod 26 upwards, the threaded rod 26 pushes the distance changing ring 24 upwards, the height of the distance changing ring 24 is increased, the distance changing ring 24 is lifted to drive the plurality of connecting rods 21 in the distance changing groove 25 to converge towards the center, the angles between the connecting rods 21 and the top side of the cooling air ring 2 are increased, so that eight cooling air channels 22 are close to the central shaft of the cooling air ring 2, and the distance between the cooling air channels 22 and the plastic film cylinder is reduced; the threaded rod 26 is screwed downwards, the threaded rod 26 pulls the distance changing ring 24 downwards, the height of the distance changing ring 24 is reduced, the distance changing ring 24 reduces to drive the plurality of connecting rods 21 in the distance changing groove 25 to diffuse all around, the included angle between the connecting rods 21 and the top side of the cooling air ring 2 is reduced, so that eight cooling air channels 22 are far away from the central shaft of the cooling air ring 2, and the distance between the cooling air channels 22 and the plastic film cylinder is increased.

Because the cooling air duct 22 moves towards the direction away from the plastic film cylinder, the cooling air duct 22 moves to drive the inclination angle of the guide rod 3 to be reduced, the sliding block 33 above the guide rod 3 moves downwards due to the reduction of the inclination angle of the guide rod 3, the hinged telescopic rod 31 between the guide rods 3 is always kept horizontal in the process, the plugging mode of the rotating rod 312 and the rotating cylinder 311 can change the length according to the inclination of the guide rod 3, the radius of the circumference where the bottom end of the guide rod 3 is located is increased, and the plastic film cylinder with a larger radius is accommodated.

The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims (8)

1. A cooling discharging device of a plastic film blowing machine is characterized in that: comprises a cooling air ring (2) horizontally arranged at the top end of an extrusion opening of a blow molding film head (11), wherein a plurality of air inlet pipes (12) communicated with the inside of the cooling air ring (2) are fixedly connected at the bottom side of the cooling air ring (2);

a plurality of connecting rods (21) are circumferentially and equidistantly arranged on the top side of the cooling air ring (2), one end of each connecting rod (21) is hinged with the top side of the cooling air ring (2), one end of each connecting rod (21) far away from the cooling air ring (2) is hinged with a vertically arranged cooling air channel (22), a corrugated hose (23) is arranged between each cooling air channel (22) and the cooling air ring (2), the corrugated hose (23) is used for communicating the cooling air channel (22) with the cooling air ring (2), and an air outlet hole (221) is formed in the part, facing the center, of each cooling air channel (22);

an adjusting mechanism for adjusting the radius of the circumference where the cooling air duct (22) is positioned is arranged on the cooling air ring (2);

the top ends of the cooling air channels (22) are hinged with guide assemblies, and one ends, far away from the cooling air channels (22), of the guide assemblies are close to rollers of the plastic film blowing machine (1).

2. The cooling and discharging device of a plastic film blowing machine according to claim 1, wherein: the adjusting mechanism comprises a distance changing ring (24) arranged on the plurality of connecting rods (21), distance changing grooves (25) penetrating through the distance changing ring (24) are formed in the distance changing ring (24) corresponding to the plurality of connecting rods (21), each connecting rod (21) is respectively inserted into one distance changing groove (25), and a guide device used for controlling the height of the distance changing ring (24) is arranged on the bottom wall of the distance changing ring (24).

3. The cooling and discharging device of a plastic film blowing machine according to claim 2, wherein: the guide device comprises a threaded rod (26) which is in threaded connection with the bottom wall of the variable-pitch ring (24), and the threaded rod (26) is in threaded connection with the corresponding position of the side wall of the cooling air ring (2).

4. The cooling and discharging device of a plastic film blowing machine according to claim 1, wherein: the air outlet holes (221) are distributed at equal intervals along the length direction of the cooling air channels (22), and the air outlet holes (221) on each cooling air channel (22) are all arranged at the same position.

5. The cooling and discharging device of a plastic film blowing machine according to claim 1, wherein: the guide assembly comprises four guide rods (3) arranged at the top ends of a plurality of cooling air channels (22), the same ends of the four guide rods (3) are respectively in ball joint with the top ends of the plurality of cooling air channels (22), a discharge hole is formed between the other same ends of the four guide rods (3), the distance between the four guide rods (3) in the direction away from the cooling air channels (22) is reduced, and a plurality of transversely arranged telescopic rods (31) are rotationally connected between every two guide rods (3).

6. The cooling and discharging device of the plastic film blowing machine according to claim 5, wherein: the telescopic rods (31) are transversely arranged, and the telescopic rods (31) are distributed at equal intervals along the length direction of the guide rod (3).

7. The cooling and discharging device of the plastic film blowing machine according to claim 5, wherein: the part of the guide rod (3) connected with the cooling air duct (22) is provided with a transversely arranged limiting component, and the limiting component is used for guiding the plastic film cylinder.

8. The cooling and discharging device of a plastic film blowing machine according to claim 7, wherein: the limiting assembly comprises a plurality of opposite guide rods (3), two limiting rods (34) which are sequentially hinged with each other, and an included angle is formed between the two limiting rods (34).