An automatic can box film covering device

Abstract

The present invention discloses an automatic can box film covering device, which belongs to the field of packaging technology. It includes a frame, a transportation mechanism, a roll film feeding assembly, a film reversing assembly, a film pulling assembly and a heating sealing and cutting assembly. The film reversing assembly includes two film reversing brackets symmetrically arranged on both sides of the transportation mechanism, and the film reversing brackets are right-angled triangles. The device is provided with two right-angled triangle film reversing assemblies, which turn the packaging film to open downward and open at the feed end in the running direction at the same time, so that the can box can directly enter the packaging film as the transportation mechanism runs, and the packaging is completed after the heating sealing and cutting assembly cuts and seals. The mechanism is simple, the action is simple and stable, the feeding end of the packaging film opens automatically, and the film covering is stable. There are fewer driving components and the equipment manufacturing cost is low.

Description

Technical Field

[0001] The invention relates to the technical field of packaging, and in particular to an automatic can box film sleeve device. Background Art

[0002] At present, in the production process of canned or boxed products, it is necessary to cover the canned or boxed products that have just come off the line with plastic film, on the one hand to prevent dust from entering the interior, and on the other hand to prevent scratches on the internal products during the back-end transportation process. Because the plastic film used is relatively soft, the existing machine uses a vacuum suction cup to suck the film and put it on. Although the basic function is achieved, the failure rate is high due to the complex mechanism and action, the stability is poor, and occasionally there will be problems such as failure to suck or deformation after suction and failure to put on, which cannot completely replace manual work.

[0003] At present, there is an urgent need for an efficient, stable, fully automated can box film covering process, which can replace manual labor in the stage of covering the can box with plastic film, reduce the labor cost of enterprise production, and realize a series of actions such as automatic can box plastic film covering. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes an automatic can box film covering device, which adopts a simple mechanical structure to achieve fully automatic film covering and has high stability.

[0005] In order to achieve the above object, the present invention is implemented by the following technical solutions:

[0006] An automatic can box film covering device comprises a frame and a transport mechanism for arranging the can boxes in a row and transporting the whole row of can boxes, and also comprises a can box disposed on the frame;

[0007] A roll film feeding assembly, located on either side of the transport mechanism, is used to transport the packaging film to the top of the transport mechanism and stretch it so that the packaging film is covered on the can box on the lower transport mechanism;

[0008] The film reversing assembly is located on both sides of the conveying mechanism, and is used to turn the packaging film and make its packaging film opening downward. The film reversing assembly includes two film reversing brackets symmetrically arranged on both sides of the conveying mechanism. The film reversing brackets are right-angled triangles, and the triangular planes formed by the film reversing brackets are parallel to the plane where the running route of the conveying mechanism is located. The hypotenuse of the film reversing bracket is arranged at the feeding end of the conveying mechanism;

[0009] The film pulling assembly is located on both sides of the transport mechanism and is arranged at the running discharge end of the film reversing bracket, and is used to pull the packaging film to make it run;

[0010] The heating, sealing and cutting assembly is located above the transport mechanism and is arranged in front of the film pulling assembly for cutting and sealing the packaging film sleeved on the can box.

[0011] Furthermore, the roll film feeding assembly includes a feeding shaft and a feeding auxiliary shaft below the feeding shaft, a gap is formed between the feeding shaft and the feeding auxiliary shaft for facilitating the passage of the packaging film; the feeding shaft and the feeding auxiliary shaft are both parallel to the axial direction of the transport mechanism; the feeding shaft and the feeding auxiliary shaft rotate synchronously in opposite directions;

[0012] The packaging film is formed into a roll film and is placed between the feeding shaft and the feeding auxiliary shaft.

[0013] Furthermore, the roll film feeding assembly also includes a feeding drive that drives the feeding shaft and the feeding auxiliary shaft to rotate, and the feeding drive is arranged on the side and below the transportation mechanism.

[0014] Furthermore, the roll film feeding assembly further comprises at least two tension rods for stretching and smoothing the packaging film; the two tension rods are axially parallel to the transport mechanism;

[0015] One of the tension rods is arranged below the gap formed by the feeding shaft and the feeding auxiliary shaft; the other tension rod is fixed on the frame and just above the transport mechanism.

[0016] Furthermore, the film pulling assembly includes a pulling drive and two groups of pulling parts, and the two groups of pulling parts are symmetrically arranged on both sides of the conveying mechanism; each group of pulling parts includes a pulling shaft arranged above the pulling drive and vertically perpendicular to the conveying mechanism, and a pulling wheel connected above the pulling shaft; the pulling parts are arranged at the running discharge end of the film reversing bracket;

[0017] The material pulling wheel includes an active material pulling rubber wheel and a driven material pulling rubber wheel. The active material pulling rubber wheel is connected to the material pulling shaft and rotates through the rotation of the material pulling shaft; the driven material pulling rubber wheel is in close contact with the active material pulling rubber wheel, and the packaging film is clamped between the driven rubber wheel and the active material pulling rubber wheel, and drives the packaging film to move forward from the film reversing bracket.

[0018] Furthermore, the heating and sealing assembly includes a heat-sealing driving cylinder, a linear guide rod fixed on a frame, a heat-cutting support member sleeved on the linear guide rod, and a heating strip fixed on the heat-cutting support member;

[0019] The linear guide rod is perpendicular to the transport mechanism in the horizontal direction, and the heating strip is perpendicular to the transport mechanism in the vertical direction;

[0020] The heat sealing driving cylinder is connected to the heat cutting support member and drives the heat cutting support member to reciprocate in the horizontal direction along the linear guide rod.

[0021] Furthermore, there are at least two linear guide rods, one of which is arranged above the operating mechanism, and the other is arranged below the operating mechanism or passes through the operating mechanism horizontally or vertically;

[0022] The hot-cutting support member includes a first support member and a second support member, which are respectively arranged on both sides of the transportation mechanism. The first support member is provided with a heating strip, and the second support member is provided with a silicone positioning block; the heating strip and the silicone positioning block are arranged in relative coordination.

[0023] Further, the first support member includes a linear bearing connecting plate, the upper and lower ends of the linear bearing connecting plate are provided with connecting holes, and the linear bearing connecting plate is respectively sleeved on the two linear guide rods through the upper and lower connecting holes; at least two bolts are provided at the upper and lower ends of the linear bearing connecting plate and the side close to the heat sealing driving cylinder, and a buffer spring is provided on the bolt sleeve; the front end of the buffer spring is connected to a buffer movable block; the front ends of the two buffer movable blocks are fixed with a heat sealing heating strip connecting plate, and the end of the heat sealing heating strip connecting plate close to the belt conveyor is fixed with a heating strip;

[0024] The silicone positioning block is fixed to the second support member by bolts;

[0025] When the silicone positioning block is butted against the heating strip on the heat-sealing heating strip connecting plate, the buffer movable block and the buffer spring are used for forward and backward movement and buffering.

[0026] Furthermore, the first support member is provided with an air blowing nozzle, and the air blowing nozzle blows air along the running direction of the first support member.

[0027] Furthermore, it also includes a controller and a proximity switch, the proximity switch is arranged on the side of the transport mechanism and is arranged at the front end of the first support member along the running direction; a slot-type photoelectric sensor is arranged on the frame near the end of the roll film formed by the packaging film;

[0028] The controller is connected with the proximity switch and the slot-type photoelectric sensor by electrical signals; the controller is connected with the transport mechanism, the feeding drive, the pulling drive and the heat-sealing drive cylinder by electrical signals.

[0029] The automatic can box film covering device of the present invention has the following beneficial effects:

[0030] (1) Two right-angled triangular film reversing components are provided to turn the packaging film to face downward and open at the feeding end in the running direction, so that the cans can directly enter the packaging film as the transport mechanism runs, and the packaging is completed after the heating and sealing components cut and seal.

[0031] (2) The packaging film used in the can film is thin and soft. The general packaging machine uses a vacuum suction cup to absorb and is easily misplaced and cannot be absorbed after being charged with static electricity. However, the present invention has a simple structure, simple and stable operation, the feeding end of the packaging film opens automatically, and the film is stable. There are fewer driving parts, low equipment manufacturing cost, and low energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0033] Figure 1 It is a schematic diagram of the structure of the right side portion of the operation of the present invention;

[0034] Figure 2 It is a schematic diagram of the structure of the front end part of the operation of the present invention;

[0035] Figure 3 It is a schematic diagram of the structure of the left side portion of the operation of the present invention;

[0036] Figure 4 It is a schematic diagram of the structure of the feeding drive in the roll film feeding assembly;

[0037] Figure 5 It is a structural schematic diagram of a film drawing assembly;

[0038] Figure 6 It is a schematic diagram of the structure of the heating, sealing and cutting assembly;

[0039] Figure 7 It is a schematic diagram of the connection between the heating strip and the buffer movable block;

[0040] 1. Aluminum profile frame, 2. Belt conveyor, 3. Film reversing bracket, 4. Bottom limit support plate, 5. Film reversing bracket upright, 6. Fixed round rod, 7. Heat sealing cylinder fixed bracket, 8. Linear guide rod, 9. Silicone positioning block, 10. Heating strip, 11. Linear bearing connecting plate, 12. Heat sealing heating strip connecting plate, 13. Heat sealing drive cylinder, 14. Buffer spring, 15. Blowing nozzle, 16. Pulling active rubber wheel, 17. Pulling driven rubber wheel, 18. Pulling shaft seat, 19. Pulling transmission box, 20. Pulling shaft, 21. Pulling shaft bevel gear, 22. Pulling horizontal spindle, 23. Pulling horizontal spindle Bevel gear, 24 floating connector, 25 pulling shaft synchronous pulley, 26 driving motor, 27 driving gearbox body, 28 driving motor output shaft, 29 first tension rod, 30 output shaft bevel gear, 31 feeding driving shaft, 32 feeding driving shaft bevel gear, 33 feeding auxiliary synchronous pulley, 34 feeding shaft, 35 feeding shaft synchronous pulley, 36 feeding shaft bearing seat, 37 third tension rod, 38 feeding auxiliary shaft, 39 proximity switch, 40 film roll, 41 pulling component, 42 can box, 43 buffer movable fast, 44 first tension rod fixing plate, 45 slot type photoelectric sensor. DETAILED DESCRIPTION

[0041] The present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0042] Example 1

[0043] An automatic can box film sleeve device, such as Figure 1-Figure 7 As shown, it includes a frame and a transport mechanism for arranging the can boxes 42 into a row and arranging the entire row of can boxes for transportation, and also includes a transport mechanism disposed on the frame;

[0044] The roll film feeding assembly is located on either side of the conveying mechanism, and is used to convey the packaging film to the top of the conveying mechanism and to stretch the packaging film so that it can be put on the can box on the lower conveying mechanism;

[0045] The film reversing assembly is located on both sides of the conveying mechanism and is used to turn the packaging film so that its opening is downward. The film reversing assembly includes two film reversing brackets 3 symmetrically arranged on both sides of the conveying mechanism. The film reversing brackets 3 are arranged in a right-angle triangle, and the triangular plane formed by the film reversing brackets 3 is parallel to the plane where the running route of the conveying mechanism is located. The hypotenuse of the film reversing bracket 3 is arranged at the feed end of the conveying mechanism;

[0046] The film pulling component is located on one side of the transport mechanism and is arranged at the running discharge end of the film reversing bracket 3, and is used to pull the packaging film to make it run;

[0047] The heating, sealing and cutting assembly is located above the transport mechanism and is arranged in front of the film pulling assembly for cutting and sealing the packaging film sleeved on the can box.

[0048] In this embodiment, the transport mechanism is a belt conveyor, and the belt conveyor 2 is responsible for docking the can boxes from the previous process and transporting them forward.

[0049] Film feed assembly

[0050] In this embodiment, the roll film feeding assembly includes a feeding shaft and a feeding auxiliary shaft. The feeding shaft and the feeding auxiliary shaft are parallel to each other and form a gap between them for easy passage of the packaging film; the feeding shaft is parallel to the axis of the transport mechanism; the feeding shaft and the feeding auxiliary shaft rotate synchronously in opposite directions.

[0051] The film roll feeding assembly also includes a feeding drive for driving the feeding shaft and the feeding auxiliary shaft to rotate, and the feeding drive is arranged on the side of the transport mechanism. The feeding drive includes a driving motor 26, a driving gearbox body 27, a driving motor output shaft 28, an output shaft bevel gear 30, a feeding driving shaft 31, a feeding driving shaft bevel gear 32, a feeding auxiliary shaft synchronous pulley 33 and a feeding shaft synchronous pulley 35.

[0052] like Figure 4As shown, a square feed shaft mounting plate is provided at the rear end of one side of the aluminum profile frame 1, and the feed shaft mounting plate is fixed to the aluminum profile frame with bolts, and two bearings with seats are provided at the edge of the feed shaft mounting plate, and one end of the feed shaft 34 and the feed auxiliary shaft 38 are respectively fixed in the two bearing holes with seats and locked with screws. The other end of the feed shaft has a drive gearbox body 27, and the drive gearbox body is fixed to the aluminum profile frame 1, and one end of the feed shaft 34 and the feed auxiliary shaft 38 is fixed through the bearing with seats and one side of the drive gearbox body. A driving motor 26 is provided at the rear end of the driving gearbox, and the driving motor 26 is fixedly installed on the rear side of the driving gearbox 27 by bolts. The shaft end of the driving motor is connected to the output shaft 28 of the driving motor through a coupling, and the other end of the output shaft 28 of the driving motor is fixedly installed through a seat bearing and a driving gearbox body. A synchronous pulley is provided on the side close to the seat bearing after the motor output, and an output shaft bevel gear 30 is provided on the side close to the coupling of the output shaft 28 of the driving motor. The output shaft bevel gear 30 is connected with a feeding driving shaft bevel gear 32. The driving motor drives the output shaft bevel gear 30 to rotate and drives the feeding driving shaft bevel gear 32 to rotate. The feeding driving shaft bevel gear 32 is connected to the feeding driving shaft 31, and the feeding driving shaft 31 is connected to the feeding auxiliary synchronous pulley 33. The end of the feed shaft 34 is connected to a feed shaft bearing seat 36. A feed auxiliary shaft 38 is arranged below one side of the drive gearbox body close to the feed shaft. The feed auxiliary shaft 38 is connected and fixed to the drive gearbox body through two front and rear seat bearings. A feed shaft synchronous pulley 35 is arranged at the end of the feed shaft 34; the feed auxiliary synchronous pulley 33 and the feed shaft synchronous pulley 35 are driven by a belt. The rotation of the driving motor drives the output shaft bevel gear 30 and the feed driving shaft bevel gear 32 to rotate, and the feed shaft 34 is driven to rotate through the transmission of the feed auxiliary synchronous pulley 33 and the feed shaft synchronous pulley 35. The feed auxiliary shaft 38 moves according to the rotation of the roll film 40, and the two achieve synchronous rotation.

[0053] Exemplarily, the roll film feeding assembly further comprises three tension rods for stretching and smoothing the packaging film, namely, a first tension rod 29, a second tension rod and a third tension rod 37, and the three tension rods are parallel to the axial direction of the transport mechanism;

[0054] The first tension rod 29 is arranged below the gap formed by the feeding shaft and the feeding auxiliary shaft and close to one side of the belt conveyor; the third tension rod 37 is fixed on the frame and directly above the transportation mechanism, and the second tension rod is arranged between the first tension rod 29 and the third tension rod 37.

[0055] A vertical slot is provided on the first tension rod fixing plate 44, and the two ends of the first tension rod 29 are installed in the slot and can move up and down. The first tension rod 29 can pull the film downward under the action of gravity, and will move upward when the feeding tension exceeds the gravity, that is, the first tension rod will move upward when the tension is too large; when the tension is reduced, the first tension rod will move downward to ensure that the film is in a tensioned state, and when the front end cannot be pulled, the first tension rod will move upward to relax the film.

[0056] The packaging film is formed into a roll film and is placed between the feeding shaft and the feeding auxiliary shaft. The packaging film is a folded double-layer film with one side open.

[0057] The film roll 40 is placed between the feed shaft 34 and the feed auxiliary shaft 38. The film roll 40 first passes through the middle of the first tension rod 29 and the second tension rod, and then runs upward to the third tension rod 37 on the top of the frame. Then it runs downward from the third tension rod to the film reversing bracket 3. Since the film roll is a double-layer folded film with an opening, the opening section of the film roll is divided into two single-layer films during the downward process from the third tension rod 37. The two single-layer films are respectively rolled on both sides of the film reversing bracket 3, and after being folded 90 degrees along the hypotenuse of the film reversing bracket 3, the front end and the top end are closed, and the bottom end and the rear end are open, and then it runs forward.

[0058] Thin film switching components

[0059] In this embodiment, the film reversing bracket is arranged in a right triangle, and the triangular plane formed by the film reversing bracket is parallel to the plane where the running route of the transport mechanism is located, and the hypotenuse of the film reversing bracket is arranged at the feed end of the transport mechanism.

[0060] In this embodiment, the film reversing assembly further includes a fixed round rod 6 , a film reversing support upright rod 5 and a limiting support plate 4 .

[0061] like Figure 1-Figure 3As shown, two fixed round rods 6 are horizontally arranged at the top and bottom of the aluminum profile frame 1, and the fixed round rods 6 are fixed to the aluminum profile frame 1 through a connecting seat. A film reversing support upright pole 5 is arranged on the fixed round rod 6 at the left and right sides of the belt conveyor 2, and two through holes are arranged on the upper part of the film reversing support upright pole 5 to pass through the two fixed horizontal axes and are locked with bolts at a cylindrical surface perpendicular to the fixed horizontal axis. A small hole is arranged in the middle of the film reversing support upright pole 5, and a film reversing support 3 is arranged in the small hole. After the film reversing support 3 is adjusted to a suitable position, it is locked with bolts on the side. The bottom of the two film reversing support upright poles 5 is respectively provided with a bolt hole facing the incoming direction of the can box 42, and a limit support plate 4 is arranged at the bolt hole position, which is connected and fixed with bolts. The limit support plate 4 mainly separates the roll film, and at the same time limits the can box on the belt conveyor to prevent the can box from shaking back and forth and ensure that the can box enters the packaging bag. The film reversing support upright pole 5 and the fixed round rod 6 mainly play the role of fixing and limiting, ensuring that the packaging film runs stably on the film reversing support 3.

[0062] The rolled film is folded 90 degrees along the hypotenuse of the film reversing bracket 3 and passes through the upper part of the bottom limiting support plate 4, and then passes through the outer side of the bottom limiting support plate and enters the film pulling assembly.

[0063] Film pulling components

[0064] In this embodiment, the film pulling assembly includes a pulling drive and two sets of pulling components 41, and the two sets of pulling components 41 are symmetrically arranged on both sides of the conveying mechanism. Each set of pulling components 41 includes a pulling shaft arranged above the pulling drive and vertically perpendicular to the conveying mechanism, and a pulling wheel connected above the pulling shaft; the pulling components 41 are arranged on both sides of the conveying mechanism and at the running discharge end of the film reversing bracket 3;

[0065] The pulling shaft and the pulling wheel form a pulling component 41, and the pulling component 41 is divided into two groups. Each group of the pulling wheels of the pulling component 41 includes a pulling active rubber wheel 16 and a pulling driven rubber wheel 17. The pulling active rubber wheel 16 is connected to the pulling shaft and rotates through the rotation of the pulling shaft; the pulling driven rubber wheel 17 is in close contact with the pulling active rubber wheel 16, and the packaging film is clamped between the pulling driven rubber wheel 17 and the pulling active rubber wheel 16, and drives the packaging film to move forward from the film reversing bracket 3.

[0066] Specifically, Figure 5As shown, the material pulling drive is a material pulling transmission box 19, which is arranged at the lower end of the above-mentioned belt conveyor 2 near the front end of the aluminum profile bracket 1, and the material pulling transmission box 19 is connected and fixed to the aluminum alloy frame by bolts, and a material pulling shaft seat 18 is respectively arranged on the left and right sides of the belt conveyor 2 above the material pulling transmission box 19, and the bottom of the material pulling shaft seat 18 is fixed to the circular hole on the top of the material pulling transmission box 19 by bolts, and a material pulling shaft 20 is arranged in the material pulling shaft seat 18, and a material pulling shaft bevel gear 21 is arranged at the bottom of the material pulling shaft 20, and a shaft sleeve is arranged on the outside of the material pulling shaft and near the upper end. A material pulling driving roller 16 is arranged at the upper end of the material pulling shaft, a material pulling auxiliary shaft is arranged on the side of the material pulling shaft sleeve close to the belt conveyor, a material pulling driven rubber wheel 17 is arranged at the upper end of the material pulling auxiliary shaft, and the lower end of the material pulling auxiliary shaft is fixedly connected to the material pulling shaft sleeve through a bearing; a hole is arranged on the bottom rib plate of the material pulling transmission box, and a hole is also arranged on the rear side plate, and a material pulling horizontal main shaft 22 is arranged to pass through the two holes, and a material pulling horizontal main shaft bevel gear 23 is arranged on the material pulling horizontal main shaft 22, and the material pulling horizontal main shaft bevel gear 23 is toothed with the material pulling shaft bevel gear 21. A material pulling shaft synchronous pulley 25 is arranged at the end of the material pulling horizontal main shaft 22, and it is connected to the rotating shaft end belt of the material pulling transmission box 19 through the material pulling shaft synchronous pulley 25. The material pulling transmission box 19 rotates, thereby driving the material pulling horizontal main shaft 22 and the material pulling horizontal main shaft bevel gear 23 thereon to rotate, and since the material pulling horizontal main shaft bevel gear 23 is toothed with the material pulling shaft bevel gear 21, the material pulling shaft bevel gear 21 is toothed and rotated in reverse direction, thereby driving the material pulling active roller 16 and the material pulling driven rubber wheel 17 to rotate.

[0067] The packaging film is a folded double-layer film with one side open. After the packaging film falls from the third tension rod 37 to the film reversing bracket 3, the end opening of the packaging film is downward, and the side opening is toward the vertical straight edge end (i.e., the discharge end) of the film reversing bracket 3, while the closed side of the packaging film is at the hypotenuse end (i.e., the feed end) of the film reversing bracket 3. The packaging film is divided into two single-layer films, which are respectively on the outside of the two film reversing brackets 3 on both sides of the belt conveyor 2. At this time, the packaging film is pulled out from the hypotenuse end (i.e., the feed end) of the film reversing bracket 3 along the belt conveyor 2 from the inside to the vertical straight edge end (i.e., the discharge end) of the film reversing bracket 3, so that the packaging film is turned 90°. An "n" shape is formed at the front end of the film reversing bracket 3 in the running direction. At this time, the two single-layer films of the packaging film are separated and horizontal. One single-layer film corresponds to a group of pulling components 41. The single-layer film is between the pulling active roller 16 and the pulling driven rubber wheel 17. The pulling active roller 16 and the pulling driven rubber wheel 17 are in close contact and rotate through the rotation of the pulling transmission box 19. Therefore, the single-layer film moves forward along with the rotation of the pulling active roller 16 and the pulling driven rubber wheel 17 to achieve the purpose of pulling the film.

[0068] Heating and sealing components

[0069] like Figure 6 and Figure 7As shown, the heating and sealing assembly includes a heat sealing drive cylinder, a linear guide rod 8 fixed on the frame, a heat cutting support member sleeved on the linear guide rod 8, and a heating strip 10 fixed on the heat cutting support member;

[0070] There are at least two linear guide rods 8, one of which is arranged above the running mechanism, and the other is arranged below the running mechanism or passes through the running mechanism horizontally and vertically; and the linear guide rod 8 is perpendicular to the transport mechanism in the horizontal direction, and the heating strip 10 is perpendicular to the belt conveyor in the vertical direction;

[0071] The heat sealing driving cylinder is connected to the heat cutting support and drives the heat cutting support to reciprocate in the horizontal direction along the linear guide rod 8.

[0072] The hot cutting support member includes a first support member and a second support member, which are respectively arranged on both sides of the transport mechanism. A heating strip 10 is arranged on the first support member, and a silicone positioning block 9 is arranged on the second support member, which plays an auxiliary role in heat sealing, mainly cooperating with the right heating strip for positioning and applying pressure to the film bag; the heating strip 10 and the silicone positioning block 9 are arranged in relative coordination. The first support member includes a linear bearing connecting plate 11, and connecting holes are arranged at the upper and lower ends of the linear bearing connecting plate 11. The linear bearing connecting plate 11 is respectively sleeved on two linear guide rods 8 through the upper and lower connecting holes; at least two bolts are arranged at the upper and lower ends of the linear bearing connecting plate 11 and on the side close to the heat sealing drive cylinder, and a buffer spring 14 is arranged on the bolt sleeve; the front end of the buffer spring 14 is connected to two upper and lower buffer movable blocks 43; two heat sealing heating strip connecting plates 12 are fixed on both sides of the two buffer movable blocks 43 by bolts, and the two heat sealing heating strip connecting plates 12 extend in the direction of the belt conveyor 2; a heating strip 10 is fixed in the middle of the two heat sealing heating strip connecting plates 12;

[0073] For example, a threaded hole is provided on both sides of the two buffer movable blocks 43, and a heat-sealing heating strip connecting plate 12 is provided with the threaded hole through bolt connection. The heat-sealing heating strip connecting plate 12 is provided with a circular hole at the top and bottom, and the circular hole is connected to the upper and lower buffer movable blocks 43 through bolts. A heating strip 10 is fixed between the two heat-sealing heating strip connecting plates 12 and fixed with bolts.

[0074] The silicone positioning block 9 is fixed on the second support member by bolts; when the silicone positioning block 9 is docked with the heating strip, the buffer spring 14 drives the entire movable block and the heat-sealing heating strip connecting plate to move forward and backward to achieve buffering.

[0075] A rubber floating joint is provided at the front end of the piston rod of the heat-sealing driving cylinder 13, and the rubber floating joint is fixedly connected to the front linear bearing connecting plate 11 through a double-headed screw and a nut. The floating joint can reduce the stress caused by assembly errors or the stress caused by long-term reciprocating motion, and can improve the overall service life of components such as the linear bearing connecting plate 11 and the heat-sealing driving cylinder 13.

[0076] The piston rod in the heat-sealing driving cylinder 13 is pushed forward, so that the first support member and the second support member move toward each other, so that the packaging film is clamped between the silicone positioning block 9 and the heating strip, and the packaging film is heated by the heating strip to achieve the purpose of sealing and cutting.

[0077] Blowing nozzle

[0078] The first support is provided with a blowing nozzle 15, and the blowing nozzle 15 blows air along the running direction of the first support. The main purpose of the blowing nozzle 15 is to blow off the heat-sealed packaging film and to dissipate heat in time at the heat-sealed incision of the packaging film.

[0079] At the same time, the packaging film can also be blown to expand the packaging film, thereby preventing the packaging film from sticking to the can box and affecting the uniformity of packaging.

[0080] Control System

[0081] In this embodiment, a control box and a proximity switch 39 are also included. The proximity switch 39 is arranged on the side of the transportation mechanism and at the front end of the first support member along the running direction.

[0082] Press the automatic button in the control box, the PLC system controls the motor of the belt conveyor 2 to start, and the can box 42 is conveyed forward. At the same time, the drive motor 26 and the material pulling transmission box 19 are controlled to start, so that the packaging film can be synchronously moved when the can box is conveyed forward. When the can box 42 reaches the front end of the belt conveyor 2, a proximity switch 39 is provided at this position. After sensing the can box, the proximity switch 39 inputs a signal to the PLC system. The PLC system controls the solenoid valve to change direction and drives the heat-sealing drive cylinder 13 to drive the heating strip and the silicone positioning block 9 to clamp the packaging film. After clamping, the heat-sealing drive cylinder 13 immediately retreats, and at the same time, the blowing nozzle 15 sprays air to blow off the heat-sealed plastic film. On the other hand, when the proximity switch 39 inputs a signal, the PLC system will control the motor of the belt conveyor 2 and the material pulling transmission box 19 to stop rotating. When the heat-sealing drive cylinder 13 returns to its original state, the PLC controls the motor of the belt conveyor 2 and the material pulling transmission box 19 to rotate again, driving the can box and the packaging film to be conveyed forward. At this time, the bagging function of the first can box is completed. When the second can box reaches the position of the proximity switch 39, the PLC controls each solenoid valve to drive each drive device to continue the above actions in sequence.

[0083] On the frame, a slot-type photoelectric sensor 45 is provided at the end of the film roll 40. The slot-type photoelectric sensor 45 is mainly used to detect whether there is packaging film. When no packaging film is detected, a signal is transmitted to the controller, and the controller controls the feeding assembly to stop rotating and change the film.

[0084] In the present invention, the PLC system includes a controller, which has the simple function of receiving signals and controlling driving, which is a conventional function in the art, and there is no other special program, and the model of the controller is not limited, as long as it can achieve these two functions. Therefore, its structure and principle are not described in detail here.

[0085] Working principle:

[0086] The roll film 40 formed by the packaging film is placed between the feed shaft 34 and the feed auxiliary shaft 38. The roll film 40 first passes through the middle of the first tension rod 29 and the second tension rod, and then runs upward to the third tension rod 37 on the top of the frame. After the packaging film falls from the third tension rod 37, it reaches the film reversing bracket 3. The end opening of the packaging film is downward, and the opening of the side faces the vertical straight edge end (i.e., the discharge end) of the film reversing bracket 3, and the closed side of the packaging film is at the hypotenuse end (i.e., the feed end) of the film reversing bracket 3. The packaging film is divided into two single-layer films, and the single-layer films are respectively on the outside of the two film reversing brackets 3 on both sides of the belt conveyor 2. At this time, the film is pulled out from the hypotenuse end (i.e., the feed end) of the film reversing bracket 3 from the inside along the belt conveyor 2 to the vertical straight edge end (i.e., the discharge end) of the film reversing bracket 3, so that the packaging film is turned 90°. An "n" shape is formed at the front end of the film reversing bracket 3 in the running direction. At this time, the two single-layer films of the packaging film are separated and horizontal. One single-layer film corresponds to a set of material pulling components 41. The single-layer film is between the material pulling driving roller 16 and the material pulling driven rubber wheel 17. The material pulling driving roller 16 and the material pulling driven rubber wheel 17 are in close contact and rotated by the rotation of the material pulling transmission box 19. Therefore, the single-layer film moves forward with the rotation of the material pulling driving roller 16 and the material pulling driven rubber wheel 17, pulling the packaging film to move forward. During the operation, the can box automatically enters the packaging film, forming a state in which the front end and the top end are closed and the lower end and the rear end are open.

[0087] When it reaches the front end of the belt conveyor 2, there is a proximity switch 39 at that position. After sensing the can box, the proximity switch 39 inputs a signal to the PLC system. The PLC system controls the solenoid valve to change direction and drives the heat seal drive cylinder 13 to drive the heating strip and the silicone positioning block 9 to clamp the packaging film. After clamping, the heat seal drive cylinder 13 immediately retreats, and the air blowing nozzle 15 blows the heat-sealed plastic film off. On the other hand, when the proximity switch 39 inputs a signal, the PLC system controls the motor of the belt conveyor 2 and the material pulling transmission box 19 to stop rotating. When the heat seal drive cylinder 13 returns to the original state, the PLC controls the motor of the belt conveyor 2 and the material pulling transmission box 19 to rotate again, and repeat the action.

[0088] The technical solutions provided by the embodiments of the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An automated can box film covering device, comprising a frame and a transport mechanism for arranging can boxes in a row and transporting the entire row of can boxes, characterized in that: Also included is a device disposed on the rack; A roll film feeding assembly, located on either side of the transport mechanism, is used to transport the packaging film to the top of the transport mechanism and stretch it so that the packaging film is covered on the can box on the lower transport mechanism; The film reversing assembly is located on both sides of the conveying mechanism, and is used to turn the packaging film and make its packaging film opening downward. The film reversing assembly includes two film reversing brackets symmetrically arranged on both sides of the conveying mechanism. The film reversing brackets are right-angled triangles, and the triangular planes formed by the film reversing brackets are parallel to the plane where the running route of the conveying mechanism is located. The hypotenuse of the film reversing bracket is arranged at the feeding end of the conveying mechanism; The film pulling assembly is located on both sides of the transport mechanism and is arranged at the running discharge end of the film reversing bracket, and is used to pull the packaging film to make it run; The heating sealing and cutting assembly is located above the transport mechanism and is arranged in front of the film pulling assembly for cutting and sealing the packaging film sleeved on the can box; The roll film feeding assembly comprises a feeding shaft and a feeding auxiliary shaft below the feeding shaft, a gap is formed between the feeding shaft and the feeding auxiliary shaft for easy passage of the packaging film; the feeding shaft and the feeding auxiliary shaft are both parallel to the axial direction of the transport mechanism; the feeding shaft and the feeding auxiliary shaft rotate synchronously in opposite directions; The packaging film is formed into a roll film and is placed between the feeding shaft and the feeding auxiliary shaft; The heating and sealing assembly comprises a heat sealing driving cylinder, a linear guide rod fixed on a frame, a heat cutting support member sleeved on the linear guide rod, and a heating strip fixed on the heat cutting support member; The linear guide rod is perpendicular to the transport mechanism in the horizontal direction, and the heating strip is perpendicular to the transport mechanism in the vertical direction; The heat sealing driving cylinder is connected to the heat cutting support and drives the heat cutting support to reciprocate in the horizontal direction along the linear guide rod; There are at least two linear guide rods, one of which is arranged above the transport mechanism, and the other is arranged below the transport mechanism or passes through the transport mechanism horizontally or vertically; The hot cutting support member comprises a first support member and a second support member, the first support member and the second support member are respectively arranged on both sides of the transport mechanism, a heating strip is arranged on the first support member, and a silicone positioning block is arranged on the second support member; the heating strip and the silicone positioning block are arranged in a relatively matched manner; The first support member comprises a linear bearing connecting plate, the upper and lower ends of the linear bearing connecting plate are provided with connecting holes, and the linear bearing connecting plate is respectively sleeved on the two linear guide rods through the upper and lower connecting holes; at least two bolts are provided at the upper and lower ends of the linear bearing connecting plate and the side close to the heat sealing driving cylinder, and a buffer spring is provided on the bolt sleeve; the front end of the buffer spring is connected to a buffer movable block; the front ends of the two buffer movable blocks are fixed with a heat sealing heating strip connecting plate, and the end of the heat sealing heating strip connecting plate close to the belt conveyor is fixed with a heating strip; The silicone positioning block is fixed to the second support member by bolts; When the silicone positioning block is docked with the heating strip on the heat-sealing heating strip connecting plate, the buffer movable block and the buffer spring are used to perform forward and backward movement buffering; The first support member is provided with an air blowing nozzle, and the air blowing nozzle blows air along the running direction of the first support member.

2. The automatic can box film covering device according to claim 1 is characterized in that: The roll film feeding assembly also includes a feeding drive that drives the feeding shaft and the feeding auxiliary shaft to rotate, and the feeding drive is arranged on the side and below the transportation mechanism.

3. The automatic can box film covering device according to claim 1 is characterized in that: The roll film feeding assembly also includes at least two tension rods for opening and smoothing the packaging film; the two tension rods are axially parallel to the transport mechanism; One of the tension rods is arranged below the gap formed by the feeding shaft and the feeding auxiliary shaft; the other tension rod is fixed on the frame and just above the transport mechanism.

4. The automatic can box film covering device according to claim 1 is characterized in that: The film pulling assembly includes a pulling drive and two groups of pulling parts, and the two groups of pulling parts are symmetrically arranged on both sides of the conveying mechanism; each group of pulling parts includes a pulling shaft arranged above the pulling drive and vertically perpendicular to the conveying mechanism, and a pulling wheel connected above the pulling shaft; the pulling parts are arranged at the running discharge end of the film reversing bracket; The material pulling wheel includes an active material pulling rubber wheel and a driven material pulling rubber wheel. The active material pulling rubber wheel is connected to the material pulling shaft and rotates through the rotation of the material pulling shaft; the driven material pulling rubber wheel is in close contact with the active material pulling rubber wheel, and the packaging film is clamped between the driven rubber wheel and the active material pulling rubber wheel, and drives the packaging film to move forward from the film reversing bracket.

5. The automatic can box film sleeve device according to claim 1 is characterized in that: It also includes a controller and a proximity switch, the proximity switch is arranged on the side of the transport mechanism and is arranged at the front end of the first support member along the running direction; a slot-type photoelectric sensor is arranged on the frame near the end of the roll film formed by the packaging film; The controller is connected with the proximity switch and the slot-type photoelectric sensor by electrical signals; the controller is connected with the transport mechanism, the feeding drive, the pulling drive and the heat-sealing drive cylinder by electrical signals.

Images