CN111232275A

CN111232275A - Film covering machine

Info

Publication number: CN111232275A
Application number: CN202010179684.1A
Authority: CN
Inventors: 厉勇; 章嘉麟
Original assignee: Zhejiang Dingye Machinery Co Ltd
Current assignee: Zhejiang Dingye Machinery Co Ltd
Priority date: 2020-03-13
Filing date: 2020-03-13
Publication date: 2020-06-05

Abstract

The invention discloses a film covering machine which comprises an arrangement frame, an upper sealing cutting piece, a lower sealing cutting piece, feeding mechanisms, two sets of unwinding devices, a control mechanism and a movable frame, wherein the upper sealing cutting piece and the lower sealing cutting piece are arranged on the arrangement frame in an up-and-down mode, the feeding mechanisms are arranged on two sides of the lower sealing cutting piece, the two sets of unwinding devices are respectively arranged on the upper portion and the lower portion of the feeding mechanisms, the upper sealing cutting piece is driven by a first air cylinder to move, the movable frame can be arranged on the arrangement frame in an up-and-down mode, the control mechanism is used for sending signals to adjust the height of the movable frame, a first sensor is arranged on the movable frame, and the first sensor is used for feeding back signals to enable the first air cylinder to stop when the upper sealing cutting piece. The height position of the upper first sensor of the movable frame is controlled by the control mechanism, when the upper sealing and cutting piece is sealed and cut, the upper sealing and cutting piece is reset upwards and reaches the first sensor, the feedback signal stops the upper sealing and cutting piece, the stroke of the upper sealing and cutting piece is made to be as small as possible, the time required by the whole sealing and cutting action is effectively reduced, and the product conveying and packaging efficiency is improved.

Description

Film covering machine

Technical Field

The invention relates to the field of vacuum packaging, in particular to a film sleeving machine.

Background

The covering film machine is mainly used for packaging, the product to be packaged is covered with the covering film, cut and packaged in a sealing mode, and then thermal shrinkage packaging is carried out after the sealing and cutting, namely the subsequent process of the covering film machine is generally connected with a thermal shrinkage machine for matched use, so that the object can achieve a perfect packaging effect, and the later-stage moving and the transportation of people are facilitated.

The film covering machine adopts two sections of conveying belts for input and output, a sealing and cutting mechanism is arranged between the two sections of conveying belts, the packaging film is arranged into an upper roll and a lower roll, the upper film and the lower film are conveyed to the position of the sealing and cutting mechanism through an unwinding mechanism, the end parts of the upper film and the lower film are sealed and cut and connected in the previous step, when a product reaches the sealing and cutting mechanism from the conveying belt at the input side, the product continuously advances to abut against the films and reaches the conveying belt at the output side through the sealing and cutting mechanism, a sensor transmits a signal to stop the film at a proper position, then the sealing and cutting structure seals and cuts the films at the rear part, the upper film and the lower film are sealed and cut into a whole and are cut from the middle part, the film covering is finished on the product, and the upper film.

The existing sealing and cutting mechanism of the film sleeving machine is driven by an air cylinder to be closed up and down to complete sealing and cutting, the sealing and cutting are completed after the completion, the sealing and cutting are separated from the top to the bottom and return to the original position, products of different specifications are sealed and cut, small specifications are operated in the largest shape and stroke state, therefore, the sealing and cutting efficiency is improved by adjusting the height positions of upper and lower sealing and cutting pieces of the sealing and cutting mechanism originally, but fasteners such as bolts and nuts need to be debugged in the mode, and the sealing and cutting pieces and the air cylinder need to be synchronously adjusted in height, the whole structure is complex, and the.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a film sleeving machine which can flexibly adjust the stroke of a sealing and cutting piece according to different specifications of processed products, improve the sealing and cutting speed and reduce the time for stopping and debugging.

The invention provides the following technical scheme: the utility model provides a film covering machine, including the arrangement frame, can move about from top to bottom set up in arranging the last piece that cuts on frame upper portion, the fixed lower piece that cuts that seals that sets up in the arrangement frame lower part, set up in the feeding mechanism of lower piece both sides that cuts, and set up respectively in feeding mechanism top and below last unwinding device and lower unwinding device, arrangement frame upper portion is provided with the first cylinder that is used for driving the activity of last piece that cuts, still include control mechanism and adjustable shelf, the adjustable shelf can move about from top to bottom set up on the arrangement frame, control mechanism is used for sending the signal and adjusts the height of adjustable shelf, be provided with first sensor on the adjustable shelf, first sensor is used for detecting when last piece that seals reaches its corresponding position feedback signal order first cylinder to stop, thereby prescribe a limit to the stop position of last piece that seals.

As an improvement, the sealing and cutting device further comprises a pressing mechanism, the pressing mechanism is located on one discharging side of the upper sealing and cutting piece and arranged on the movable frame to be adjusted up and down along with the movable frame, and the pressing mechanism comprises a second air cylinder and a pressing plate which is driven by the second air cylinder to move up and down and presses a product during sealing and cutting.

As an improvement, still include around membrane mechanism, around membrane mechanism lie in the feeding one side of last seal cutting piece and set up and position about following the adjustable of adjustable shelf on the movable shelf, around membrane mechanism including arranging along the direction of height a plurality of roller that are used for the membrane to walk around that sets up.

As an improvement, the roller shafts are two corresponding to the projection positions in the height direction, and the distance between the two roller shafts is larger than the diameter of the roller shafts.

As an improvement, a film drawing roller is arranged between the lower sealing and cutting part and the feeding mechanism on the feeding side, the film drawing roller is driven by power to rotate, the film on the lower unwinding device bypasses between the feeding mechanism on the feeding side and the film drawing roller to the lower sealing and cutting part, and the film drawing roller is used for driving a product reaching the film drawing roller to move together with the film pressed by the product.

As an improvement, the film drawing roller and the feeding mechanism at the feeding side are driven by a common driving mechanism.

As an improvement, feeding mechanism includes the conveyer belt and is used for around establishing a plurality of roller of conveyer belt on one side of the feeding, and a plurality of roller are rotated by motor drive, and a roller that is close to the drawing membrane roller sets up the gear train with drawing the membrane roller in the side cooperation, and this gear train carries out the transmission and makes the roller and draw the membrane roller to link.

As an improvement, go up unwinding device including being used for placing the roller of placing of whole roll of membrane, a pinhole wheel for being directed at the membrane, a driving roller for being used for around establishing the membrane, and main drive roller, place the roller, the pinhole wheel, main drive roller, the driving roller sets gradually and is used for around establishing the membrane in proper order, main drive roller is connected first actuating mechanism and is used for providing the initiative power pulling and places the membrane of roller and pinhole wheel department, but the wobbling setting of driving roller is on arranging the frame, trigger the third sensor when the rotatory certain angle of driving roller tunica adventitia pulling, the first actuating mechanism of third sensor feedback signal order starts the film feeding.

As an improvement, the arrangement frame is provided with an auxiliary driving roller which is in tangential fit with the main driving roller, the auxiliary driving roller is driven by the main driving roller to rotate, and the film passes through the main driving roller and the auxiliary driving roller to be transmitted.

As an improvement, two ends of the transmission roller are respectively arranged on the arrangement frame in a swinging mode through swing rods, the swing rods swing around a third rotating shaft, an induction block is arranged on the third rotating shaft, a third sensor is arranged on the side edge of the induction block, a protrusion or a groove used for being induced by the third sensor is arranged on the induction block, and when the induction block rotates to the protrusion or the groove and corresponds to the third sensor, a feedback signal of the third sensor is triggered.

The invention has the beneficial effects that: the movable frame is controlled through the control mechanism, so that the first sensor on the movable frame is moved, after the height of the movable frame is adjusted through the control mechanism, a user can stop the upper sealing and cutting piece at the lowest position where a product can normally pass according to the height specification of the product to be sealed and cut and packaged, namely the corresponding height adjusted by the first sensor, when the upper sealing and cutting piece is upwards reset and reaches the first sensor after sealing and cutting, a feedback signal stops the upper sealing and cutting piece, so that the upper sealing and cutting piece can move in a minimum stroke, the time required by the whole sealing and cutting action is effectively reduced, the product conveying and packaging efficiency is improved, the yield is further improved, and better economic benefit is brought; compared with the original mode of debugging the height of the sealing and cutting piece, the method has the advantages that the debugging difficulty is effectively reduced, and the time consumed by shutdown debugging is effectively reduced.

Drawings

Fig. 1 is a schematic perspective view of a film covering machine according to the present invention.

Fig. 2 is an enlarged view at M in fig. 1.

Fig. 3 is a schematic perspective view of a film covering machine according to the present invention.

Fig. 4 is an enlarged view of fig. 3 at N.

Fig. 5 is a three-dimensional structural schematic diagram of the film covering machine of the present invention.

Fig. 6 is an enlarged view at P in fig. 5.

Fig. 7 is a schematic three-dimensional structure diagram and a partial enlarged view of the film covering machine of the present invention.

Fig. 8 is a schematic perspective view and a partial enlarged view of an upper unwinding device of the film covering machine of the present invention.

Detailed Description

The following detailed description of specific embodiments of the invention refers to the accompanying drawings.

As shown in fig. 1, 2, 3, 4, 5, 6, 7 and 8, a specific embodiment of the film covering machine of the present invention is shown. The device comprises an arrangement frame 1, an upper sealing and cutting piece 2 which can be movably arranged on the upper portion of the arrangement frame 1 up and down, a lower sealing and cutting piece 3 which is fixedly arranged on the lower portion of the arrangement frame 1, feeding mechanisms 4 which are arranged on two sides of the lower sealing and cutting piece 3, an upper unreeling device 5 and a lower unreeling device 6 which are respectively arranged above and below the feeding mechanisms 4, wherein a first air cylinder 20 used for driving the upper sealing and cutting piece 2 to move is arranged on the upper portion of the arrangement frame 1, the device further comprises a control mechanism 15 and a movable frame 16, the movable frame 16 can be movably arranged on the arrangement frame 1 up and down, the control mechanism 15 is used for sending a signal to adjust the height of the movable frame 16, a first sensor 17 is arranged on the movable frame 16, and the first sensor 17 is used for detecting that when the upper sealing and cutting piece 2 reaches the corresponding position, the first air cylinder 20 is stopped by a feedback signal, so.

When the device is used, the lower film upwards passes through the space between the feeding mechanism 4 at the feeding side and the lower sealing and cutting piece 3 and then extends to the lower sealing and cutting piece 3, the upper film is downwards pulled from the side edge (the upper side corresponding to the lower film) of the upper sealing and cutting piece 2 and is connected with the lower film in a heat sealing way (the rear end of the upper sealing and cutting film is the front end of the upper sealing and cutting film when the previous product is subjected to heat sealing); when the product is conveyed to the lower sealing and cutting piece 3, the product can push the upper film and the lower film to move together, the product covered with the films from top to bottom reaches the conveying belt of the discharging side to stop, and the lower sealing and cutting piece 3 and the upper sealing and cutting piece 2 are matched to carry out heat sealing on the rear end of the film. The user can input the height data that the product corresponds through control mechanism 15, make adjustable shelf 16 reach and correspond the height, seal the time that cut 2 was once sealed and cut and then upwards reset like this, it is detected to reach first sensor 17 department, first sensor 17 feedback signal gives control mechanism 15, control mechanism 15 makes first cylinder 4 stop, thereby seal the time that cut 2 had stopped on the stroke height that corresponds the product most adaptation on the order, this height can be predetermine by the user, if several centimeters higher than the product, make the product pass through smoothly, and the stroke keeps as short as possible, reduce whole required time of sealing the motion of cutting, the amount of work in the improvement unit interval, and then increase of production, bring economic benefits for the user. The control mechanism 15 can be preferably realized by adopting a programmable controller, and the programmable controller is used as a mature technology, and functions can be configured by a film covering machine manufacturer, so that a user can easily input and debug the size to be debugged; this kind of debugging mode is compared in original whole manual fastener slack debugging seal piece height's mode of carrying on, greatly reduced the degree of difficulty of debugging and shut down consuming time of debugging, improved the debugging efficiency when automatic level and the different specification cartons of handling. The first sensor 17 may preferably be a proximity switch or other prior art sensor type selected to sense the arrival of an object.

As a modified specific embodiment, the sealing and cutting device further comprises a pressing mechanism 18, the pressing mechanism 18 is located on the discharging side of the upper sealing and cutting element 2 and is arranged on the movable frame 16 to adjust the up-and-down position along with the movable frame 16, and the pressing mechanism 18 comprises a second air cylinder 181 and a pressing plate 182 driven by the second air cylinder 181 to move up and down and pressing the product during sealing and cutting.

As shown in fig. 1-4, in order to make the film covering machine seal and cut the film more smoothly, so as to facilitate the subsequent heat shrinking machine to shrink the smooth outer film to wrap the product better, and ensure the packaging quality, the machine can be further provided with a pressing mechanism 18 for pressing and positioning the product during sealing and cutting, so as to keep the positions of the film and the product stable, and the sealing and cutting mechanism can complete the sealing and cutting better; the hold-down mechanism 18 holds the product in place against the conveyor belt on the discharge side. The structure of the pressing mechanism 18 and the movable frame 16 is integrated, so that the pressing mechanism 18 can flexibly adjust the height to adapt to the height of a product; the specific second air cylinder 181 can select a short stroke specification, and the pressure plate 182 is driven to move by a small stroke; compared with the prior art that the device is higher for taking care of large-size products, the moving stroke of the device is shortened, the time required by the pressing and withdrawing movement can be shortened, the processing amount in unit time is increased, and the yield is increased; on the other hand, the original large-stroke cylinder has the defects of reduced stability and shortened long-time service life due to longer stroke.

As a modified embodiment, the device further comprises a film winding mechanism 19, wherein the film winding mechanism 19 is positioned on the feeding side of the upper sealing and cutting part 2 and is arranged on the movable frame 16 to adjust the vertical position along with the movable frame 16, and the film winding mechanism 19 comprises a plurality of roller shafts 191 which are arranged in the height direction and used for winding the upper film.

As shown in fig. 5-7, the upper film is fed to the lower seal cutter 3 through a plurality of rollers arranged at a long distance, and the roller shaft 191 arranged in the middle is used for winding the film, so that the film can be prevented from floating in a long distance, and the orderly conveying of the film is facilitated; the original shaft structure for winding the film is fixed at a height, when the processed product has smaller specification and mainly has shorter height, the distance from the film to the upper surface of the product after the film winds around the shaft at the higher position is larger, the film can flutter and be unstable, and the possibility of wrinkles caused by unstable film drawing exists; the structure of the film winding mechanism 19 and the movable frame 16 is integrated, so that the height of the film winding mechanism 19 can be flexibly adjusted to adapt to the height of a product; after the film on the upper side bypasses the plurality of roll shafts 191, the shorter distance below is the product to be sealed and cut by the covering film, the film can be stably driven by the product to be pulled away to the discharge side, the film is not easy to generate floating wrinkles, and the quality of the covering film for sealing and cutting is ensured.

As a modified specific embodiment, the number of the rollers 191 is two corresponding to the projection position in the height direction, and the distance between the two rollers 191 is larger than the diameter of the rollers 191.

As shown in fig. 5-7, the winding arrangement of the film can be well realized by adopting at least two rollers 191, the film bypasses the upper roller 191 from the inner side, bypasses the roller 191 between the two rollers 191 and bypasses the lower roller 191 from the outer side, moves from the lower side to the discharging side, and plays a role in orderly conveying the film; furthermore, the distance between the two roll shafts 191 is larger than the diameter of the roll shafts 191, so that the film is smooth when being wound between the two roll shafts 191, the resistance to the film on the structure is not easy to generate, and the smooth conveying of the film is facilitated; and the projection positions of the two roller shafts 191 in the height direction correspond to each other, so that the film can orderly pass by, and excessive resistance can not be generated when the film passes by the two roller shafts 191.

As an improved specific embodiment, the movable frames 16 are two sets located on the left and right outer sides of the upper sealing and cutting piece 2, the movable frame 16 is U-shaped as a whole, the middle space of the movable frame is used for arranging the first vertical rod 21, the upper sealing and cutting piece 2 is arranged on the first vertical rod 21 in a penetrating manner to slide up and down, and the two sides of the U-shape of the movable frame 16 are used for arranging the screw rod 163 to perform transmission of up-and-down movement and the second vertical rod 164 to perform up-and-down sliding movement.

As shown in fig. 2 and 4, the movable frame 16 at the far side is shown, and the movable frame 16 with the same structure is also shown at the symmetrical position (the movable frame is hidden by the arrangement frame 1 and is not visible in the drawing); the movable frame 16 is integrally U-shaped, so that an abdicating space is formed in the middle part to arrange the first vertical rod 21, and the upper sealing and cutting piece 2 can be arranged on the first vertical rod 21 to slide up and down; the sliding and transmission of the movable frame 16 can be realized by adopting a screw rod 163 and a second vertical rod 164, and the screw rod 163 can be engaged and transmitted by matching with a slide block structure specifically arranged on the movable frame 16; the second vertical rod 164 penetrates through the movable frame 16 to ensure the up-and-down sliding stability of the movable frame 16, and preferably, a group of screw rods 163 can be arranged at one time as shown in the figure, and the second vertical rods 164 are arranged on two sides to keep the structure stable and movable.

As a modified embodiment, the rack 1 is provided with two sets of upper and lower second sensors 165 in the height direction, the two sets of upper and lower second sensors 165 are used for detecting upper and lower limit positions of the movement of the movable rack 16, and the feedback signal is used for stopping the movable rack 16 when the second sensors 165 detect that the movable rack 16 reaches its corresponding position.

As shown in fig. 2 and 4, on the premise that the control mechanism 15 is operated to perform automatic driving, in order to avoid the misoperation of the movable frame 16 by the user, for example, an excessively large debugging size (such as multiple numbers under the misoperation) is input by mistake through the control mechanism 15 (a programmable controller), the movable frame 16 may move to the extreme positions at the two ends structurally to cause structural collision, and structural movement errors may occur if parts are damaged, or the parts need to be replaced to increase the downtime and the maintenance cost, so the second sensor 165 is arranged at the height position, and when the movable frame 16 reaches the extreme positions, the second sensor 165 is sensed by the second sensor 165, and can feed back a signal to stop the movable frame 16, thereby avoiding the damage of the parts due to excessive movement. The second sensor 165 may preferably be a proximity switch or other prior art sensor type selected to sense the arrival of an object.

As a modified embodiment, the arrangement frame 1 is further provided with a second extension frame 11, the second extension frame 11 is provided with a vertical second waist-shaped hole 12 for installing a second sensor 165, and the second sensor 165 is installed in the second waist-shaped hole 12 at different heights corresponding to the upper and lower limit positions of the adjustable movable frame 16.

As shown in fig. 2 and 4, the second extending frame 11 is a support specifically arranged with the second sensor 165, and the whole of the second extending frame extends in the height direction, so as to form the vertical second kidney-shaped hole 12, and a user can detachably mount the second sensor 165 at different height positions of the second kidney-shaped hole 12 through a fastener, so that the adjustment of the upper and lower limit positions sensed by the movable frame 16 can be realized, and the user can limit the upper and lower moving ranges of the movable frame 16 according to the specific use requirement of the film covering machine.

As a modified embodiment, the lead screw 163 engaged with the two sets of movable frames 16 is connected to a motor 167 via a chain sprocket set 166 for driving. As shown in fig. 4, a driving mechanism can synchronously drive the screws 163 at two sides to move, so as to ensure the stable and orderly lifting of the structure in the transmission state.

As a modified embodiment, the movable frame 16 is provided with a first extending frame 161 extending upwards, the first extending frame 161 is provided with a vertical first waist-shaped hole 162 for mounting the first sensor 17, and the first sensor 17 is mounted in the first waist-shaped hole 162 at different heights to correspondingly adjust the relative height distance between the upper seal 2 and the movable frame 16 when the upper seal 2 stays.

As shown in fig. 2, the first extending frame 161 is a support for specifically arranging the first sensor 17, and the whole of the first extending frame extends in the height direction, so as to form a vertical first waist-shaped hole 162, and a user can detachably mount the first sensor 17 at different height positions of the first waist-shaped hole 162 through a fastener, so that the relative stopping height of the upper sealing and cutting piece 2 and the movable frame 16 can be adjusted, the normal passing of the upper film is ensured, and the conditions such as interference between the components are not generated.

As a modified embodiment, a film drawing roller 7 is arranged between the lower sealing and cutting piece 3 and the feeding mechanism 4 on the feeding side, the film drawing roller 7 is driven by power to rotate, the film at the lower coiling device 6 bypasses between the feeding mechanism 4 on the feeding side and the film drawing roller 7 to the lower sealing and cutting piece 3, and the film drawing roller 7 is used for driving the product reaching the film drawing roller 7 to move together with the film pressed by the film drawing roller 7.

As shown in fig. 5, 6 and 7, a film drawing roller 7 is additionally arranged on the basis of the original structure, a lower film passes upwards from a feeding mechanism 4 at the feeding side and the film drawing roller 7, and then extends downwards to seal and cut the piece 3 around the film drawing roller 7, when a product is conveyed from the feeding mechanism 4 at the feeding side to the film drawing roller 7, the product is pressed on the film drawing roller 7, the pressed lower film and the product can be driven by the film drawing roller 7 to move together, the film drawing roller 7 provides good active driving power for the film, the film can be discharged by the driving rollers 53 at the upper unwinding device 5 and the lower unwinding device 6, the active film drawing of the film drawing roller 7 provides power for the upper film and the lower film to overcome the weight of the driving rollers 53 at the upper unwinding device 5 and the lower unwinding device 6 to discharge the film, the film can be driven to move forwards to pass through the lower seal and cut piece 3 to the feeding mechanism 4 at the discharging side when the product is light, and is beneficial to the processing of a film machine with lighter cover, and drive thicker heavier film, increase the packing kind, satisfy producer's abundantly packing demand day by day, and needn't purchase the cover membrane machine of many money to adapt to the product specification, reduce cost.

As a modified embodiment, the draw film roll 7 and the feed-side feed mechanism 4 are driven by a common drive mechanism.

Under the above embodiment, it is not necessary to additionally add a driving mechanism, and the driving mechanism of the feeding mechanism 4 on the feeding side can directly drive the film drawing roller 7 to work after being connected through the transmission mechanism, so that the common action of the feeding mechanism 4 on the feeding side and the film drawing roller 7 can be realized, the conveying requirement of the product on the feeding side is met, the synchronous driving stability is good, and the driving mechanism and the control part are not necessary to be added with additional cost.

As an improved specific embodiment, the feeding mechanism 4 on the feeding side comprises a conveying belt 41 and a plurality of roller shafts 42 for winding the conveying belt 41, the plurality of roller shafts 42 are driven by a motor to rotate, a roller shaft 42 close to the film drawing roller 7 and the film drawing roller 7 are provided with a gear set 8 in a side edge matching manner, and the gear set 8 is used for driving to enable the roller shafts 42 and the film drawing roller 7 to be linked.

As shown in fig. 6 and 7, the feeding mechanism 4 conveys the product by a conveying belt 41 and a roller 42 in the prior art, and can be controlled by an existing control component to start and stop; a roll shaft 42 close to the film drawing roll 7 is connected with the film drawing roll 7 through a gear set 8 for transmission, so that the roll shaft 42 and the film drawing roll 7 rotate in the same direction, and the film drawing roll 7 as a conveying belt 41 can well finish the conveying of products and actively draw films; and the mode that carries out the transmission with gear train 8 guarantees that transmission efficiency is high, and the cost is lower, can improve the stability of cover membrane machine work and guarantee the control of cost.

As a modified embodiment, the height of the upper end of the film drawing roller 7 is consistent with the height of the upper supporting surface of the conveying belt 41.

As shown in fig. 6 and 7, the film drawing roller 7, while performing the function of drawing the film, also serves as an extension of the conveying belt 41 in the horizontal direction, and performs good forward conveying on the product; the height defined here can be kept the same, or it can be arranged without significant height difference, so that the product will reach the film-drawing roller 7 from the conveyer belt 41 without bumping and can be conveyed stably depending on the size of the product.

As a modified embodiment, the height of the upper end of the lower seal cutter 3 is consistent with that of the upper end of the film drawing roller 7.

As shown in fig. 6 and 7, compared with some structures that are closed and heat-sealed with the upper sealing and cutting piece 2 by lifting in the prior art, the film covering machine of the present invention uses the lower sealing and cutting piece 3 in a relatively fixed manner, i.e. an elastic piece (such as a spring embodied in a partially enlarged view in fig. 7) is arranged below the specific sealing and cutting piece of the lower sealing and cutting piece 3 for buffering, and a certain amount of downward pressure exists when the lower sealing and cutting piece is closed with the upper sealing and cutting piece 2, so as to ensure the sufficient closing and better complete the heat sealing; the upper end height of the lower sealing and cutting piece 3 is consistent with that of the film drawing roller 7, so that the product is supported and passed well, and no obvious gap exists in the product conveying direction, for example, the gap exists in the position of the lower sealing and cutting piece 3 which is lifted and lowered in the prior art before the lifting and heat sealing, the lower sealing and cutting piece 3 basically supplements the gap, so that the product can stably pass without bumping, and further, the lower sealing and cutting piece can be used for processing the packaging of products with smaller sizes. The heights defined here are kept consistent, and in particular, they can be kept at the same height, or they can be arranged without significant height difference, so that the products can reach the lower seal-cutting member 3 from the film-drawing roller 7 without bumping and can be stably conveyed depending on the size of the products.

As an improved specific embodiment, the upper unwinding device 5 comprises a placing roller 51 for placing a whole roll of film, an eyelet wheel 52 for punching a needle hole on the film, a driving roller 53 for winding the film, and a main driving roller 54, wherein the placing roller 51, the eyelet wheel 52, the main driving roller 54, and the driving roller 53 are sequentially arranged for sequentially winding the film, the main driving roller 54 is connected with a first driving mechanism 55 for providing a driving force to pull the film at the placing roller 51 and the eyelet wheel 52, the driving roller 53 is swingably arranged on the arrangement frame 1, when the driving roller 53 is pulled by the film to rotate by a certain angle, a third sensor 56 is triggered, and a feedback signal of the third sensor 56 triggers the first driving mechanism 55 to start film feeding.

As shown in fig. 5 and 8, when the product is conveyed to the lower sealing and cutting part 3, the product pushes the upper film and the lower film to travel together, then the pulled film drives the driving roller 53 at the upper unreeling device 5 to swing, the third sensor 56 senses the film at a certain angle, then the third sensor 56 is triggered to feed back a signal to the first driving mechanism 55, the started first driving mechanism 55 actively feeds the film, the film at the preorder placing roller 51 and the pinhole wheel 52 is conveyed backwards for a section, and then the film stops working, and the next time of triggering is continuously conveyed for a section; the fed film lengthens the film at the driving roller 53, and the driving roller 53 is restored by an existing restoring structure such as an elastic member or self-weight. The two matched rollers 51 are arranged, the whole roll of film is placed in the middle, and the film discharging is realized when the whole roll of film rolls. When the product pushes the film to advance, the film at the position of the driving roller 53 is only pulled to advance, so that the force required by the product for pushing the film is reduced, and the lighter product can be suitable for a film covering machine to finish the pushing work of the film, or the thicker and heavier film can be driven to be packaged, thereby meeting different packaging requirements of producers; after the first driving mechanism 55 is started, the film at the positions of the placing roller 51 and the needle eye wheel 52 is pulled out of the film, and the stability of punching the needle eye is higher in the mode, so that the needle eye can be guaranteed to be punched on the film in an aligned mode. In the case of this embodiment, the overall performance is better in combination with the active belt film of the film drawing roller 7.

As a modified specific embodiment, the arrangement frame 1 is provided with a secondary driving roller 541 which is tangentially matched with the main driving roller 54, the secondary driving roller 541 is driven by the main driving roller 54 to rotate, and the film passes through between the main driving roller 54 and the secondary driving roller 541 for transmission conveying.

As shown in fig. 8, in the embodiment, the film can be positioned by being sandwiched between the main driving roller 54 and the sub-driving roller 541 and the film can be driven to be drawn out while rotating; the first driving mechanism 55 may be implemented by a motor, and drives the main driving roller 54 through a rack and pinion structure, and is turned on by the control mechanism 15 according to a feedback signal of the third sensor 56, and is stopped after a rated time, thereby feeding a rated length of film. The main driving roller 54 is a roller for main output power, and when the sub driving roller 541 is not provided, the positioning of the film and the driving of the film can be realized by winding the film with other rollers; the auxiliary driving roller 541 is added to further improve the effects of stabilizing the film nip positioning and the rated feeding. The sub-driving roller 541 may be provided as a debuggable structure that can be operated away from the main driving roller 54 to form a space for initially passing through the film and then resetting the nipping film.

As a modified embodiment, two ends of the driving roller 53 are respectively swingably disposed on the arrangement rack 1 through a swing lever 531, the swing lever 531 swings around a third rotating shaft 532, a sensing block 533 is disposed on the third rotating shaft 532, the third sensor 56 is disposed on a side edge of the sensing block 533, and the sensing block 533 has a protrusion or a groove 534 for being sensed by the third sensor 56, and when the sensing block 533 rotates to the protrusion or the groove 534 corresponding to the third sensor 56, a feedback signal of the third sensor 56 is triggered.

As shown in fig. 8, the sensing block 533 arranged on the third rotating shaft 532 can be used in pair with the correspondingly arranged third sensor 56, and the arrangement of the sensing block on the side does not affect the normal film running; the third sensor 56 may preferably be a proximity switch or other prior art sensor type selected to sense the arrival of an object or a change in distance; the third sensor 56 feeds back a signal when sensing that the protrusion or the groove 534 corresponds, wherein the driving roller 53 is pulled by the film to rotate by a certain angle, which may be set according to the length requirement of the film running and the length of the swing link 531 in the prior art, and may not be specifically limited to what angle. In specific implementation, the driving roller 53 can be matched with other fixed rollers to wind the film, so that the film can better move along the swinging direction of the driving roller 53, and the driving roller 53 is driven to swing when the film is pulled.

As an improved specific embodiment, the eyelet wheels 52 are provided in groups and sequentially arranged on a first rotating shaft 521, the arrangement frame 1 is further provided with a second rotating shaft 522, the second rotating shaft 522 is provided with a plurality of engaging wheels 523, the engaging wheels 523 and the eyelet wheels 52 are arranged in a one-to-one correspondence and are in tangent engagement, the engaging wheels 523 are provided with annular grooves for avoiding the needles on the eyelet wheels 52, and the film passes through between the eyelet wheels 52 and the engaging wheels 523 for transmission and conveying.

As shown in fig. 8, the first rotating shaft 521 and the second rotating shaft 522 are arranged in parallel, several pinhole wheels 52 are uniformly arranged in the axial direction of the first rotating shaft 521, the second rotating shaft 522 is correspondingly provided with a matching wheel 523 which is matched with the first rotating shaft and the second rotating shaft to clamp the membrane, when the membrane is pulled, the pinhole wheels 52 and the matching wheel 523 synchronously rotate, and the needles on the pinhole wheels 52 open air holes on the membrane; the annular groove is used for abdicating the needle, and the film is pressed by the entity at the two sides and the side edge of the needle eye wheel 52, so that the needle stably pierces the film during rotation.

As a modified embodiment, a plurality of lower guide shafts 61 for the lower film to pass around are arranged in the height direction between the lower winding device 6 and the film drawing roller 7; the lower guide shaft 61 is rotatably provided on a fixed frame 62, and the fixed frame 62 is mounted on the arrangement frame 1 by fasteners.

As shown in fig. 7, in order to avoid the fluttering of the lower film, the lower guide shaft 61 is specifically arranged to wind the film, so that the fluttering of the film in a long distance can be avoided, and because the lower part does not need to adapt to the height of the product, the lower guide shaft 61 is specifically installed by a fixing frame 62 with a fastener, so that frequent height adjustment is not needed, and the cost is controlled; when the user needs to carry out height adjustment, can further implement for setting up the mounting hole in a plurality of positions to cooperate the fastener, come dismouting mount 62 to different heights, satisfy specific use needs.

As a modified specific embodiment, the lower guide shafts 61 are two corresponding in projection position in the height direction.

As shown in fig. 7, the film winding arrangement can be well realized by adopting at least two lower guide shafts 61, the film passes around the lower guide shaft 61 on one side, passes around the lower guide shaft 61 on the other side and passes around the upper lower guide shaft 61 on the other side, reaches the film drawing roller 7, and has the function of orderly conveying the film; the two lower guide shafts 61 correspond in projection position in the height direction, and the film is passed around in order, so that excessive resistance is not generated when the film passes around the two lower guide shafts 61.

The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims

1. The utility model provides a film covering machine, includes arrangement frame (1), can move about from top to bottom and set up in last seal cutting (2) on arrangement frame (1) upper portion, fixed set up in lower seal cutting (3) of arrangement frame (1) lower part, set up in feeding mechanism (4) of sealing cutting (3) both sides down and set up in last unwinding device (5) of feeding mechanism (4) top and below and transfer rolling device (6) respectively, arrangement frame (1) upper portion is provided with and is used for driving first cylinder (20) of sealing cutting (2) activity, its characterized in that: still include control mechanism (15) and adjustable shelf (16), adjustable shelf (16) can be movable about setting up on setting up frame (1), control mechanism (15) are used for sending the height that the signal comes adjustment adjustable shelf (16), be provided with first sensor (17) on adjustable shelf (16), first sensor (17) are used for detecting and are sealed when cutting (2) reach its corresponding position feedback signal signaling first cylinder (20) stop to the stop position of seal cutting (2) is gone up in the injecing.

2. A laminating machine according to claim 1, characterised in that: the sealing and cutting device is characterized by further comprising a pressing mechanism (18), wherein the pressing mechanism (18) is located on one discharging side of the upper sealing and cutting piece (2) and is arranged on the movable frame (16) and adjusted to be in the vertical position along with the movable frame (16), and the pressing mechanism (18) comprises a second air cylinder (181) and a pressing plate (182) which is driven by the second air cylinder (181) to move vertically and presses a product during sealing and cutting.

3. A laminating machine according to claim 1, characterised in that: still include around membrane mechanism (19), around membrane mechanism (19) be located the feeding one side of last seal cutting piece (2) and set up in adjustable upper and lower position along with adjustable shelf (16) on adjustable shelf (16), around membrane mechanism (19) including arranging along the direction of height and setting up be used for a plurality of roller (191) that the membrane was walked around.

4. A laminating machine according to claim 3, characterised in that: the roller shafts (191) are two rollers corresponding to the projection positions in the height direction, and the distance between the two roller shafts (191) is larger than the diameter of the roller shafts (191).

5. A laminating machine according to any one of claims 1-4, characterised in that: a film drawing roller (7) is arranged between the lower sealing and cutting part (3) and the feeding mechanism (4) at the feeding side, the film drawing roller (7) is driven by power to rotate, a film at the lower rolling device (6) bypasses between the feeding mechanism (4) at the feeding side and the film drawing roller (7) to the lower sealing and cutting part (3), and the film drawing roller (7) is used for driving a product reaching the film drawing roller (7) to move together with the film pressed by the film drawing roller.

6. A laminating machine according to claim 5, characterised in that: the film drawing roller (7) and the feeding mechanism (4) at the feeding side are driven by a common driving mechanism.

7. A laminating machine according to claim 6, characterised in that: feeding side feeding mechanism (4) include conveyer belt (41) and be used for around establishing a plurality of roller (42) of conveyer belt (41), and a plurality of roller (42) are rotated by motor drive, are close to a roller (42) of drawing membrane roller (7) and draw membrane roller (7) and set up gear train (8) in the side cooperation, and this gear train (8) carry out the transmission and make roller (42) and draw membrane roller (7) to link.

8. A laminating machine according to any one of claims 1-4, characterised in that: go up unwinding device (5) including being used for placing whole roll membrane place roller (51), be used for to the membrane punch needle eye the pinhole wheel (52), be used for around establishing driving roller (53) of membrane and main drive roller (54), place roller (51), pinhole wheel (52), main drive roller (54), driving roller (53) set gradually and be used for around establishing the membrane in proper order, main drive roller (54) are connected first actuating mechanism (55) and are used for providing the initiative power pulling and place the membrane of roller (51) and pinhole wheel (52) department, but the wobbling setting of driving roller (53) is on arranging frame (1), triggers third sensor (56) when driving roller (53) tunica adventitia pulling rotation certain angle, and third sensor (56) feedback signal order first actuating mechanism (55) start to send the membrane.

9. A laminating machine according to claim 8, characterised in that: the film conveying device is characterized in that an auxiliary driving roller (541) which is in tangent fit with the main driving roller (54) is arranged on the arrangement frame (1), the auxiliary driving roller (541) is driven to rotate by the main driving roller (54), and a film passes through the main driving roller (54) and the auxiliary driving roller (541) to be conveyed in a transmission mode.

10. A laminating machine according to claim 8, characterised in that: the two ends of the transmission roller (53) are respectively arranged on the arrangement frame (1) in a swinging mode through the swing rod (531), the swing rod (531) swings around a third rotating shaft (532), the third rotating shaft (532) is provided with a sensing block (533), the side edge of the sensing block (533) is provided with a third sensor (56), the sensing block (533) is provided with a protrusion or a groove (534) used for being sensed by the third sensor (56), and when the sensing block (533) rotates to the protrusion or the groove (534) and corresponds to the third sensor (56), a feedback signal of the third sensor (56) is triggered.