CN114536872B

CN114536872B - Method and device for forming bags and applying bags on folded film once

Info

Publication number: CN114536872B
Application number: CN202210231707.8A
Authority: CN
Inventors: 章路路; 沈旭东; 林开欧; 黄书文; 张生科
Original assignee: Ningbo Yinzhikang Technology Co ltd
Current assignee: Ningbo Yinzhikang Technology Co ltd
Priority date: 2022-03-10
Filing date: 2022-03-10
Publication date: 2024-03-15
Anticipated expiration: 2042-03-10
Also published as: CN114536872A

Abstract

The invention provides a method and a device for one-time bag making and feeding by folding films, which comprises the following steps: a. sealing the front ends of the two side surfaces of the folding film to form a front sealing edge of the bag to be prepared; b. separating two side surfaces of a rear area of the front edge sealing on the folding film; c. advancing the front hem seal on the folded film a set length and into the bag holder; d. sealing two side surfaces of the part, which is away from the front edge, of the folding film and is wide by one bag, so as to form a sealing part; e. the middle position of the sealing part is cut, the front side of the sealing part after cutting is the rear sealing edge of the previous bag, and the rear side is the front sealing edge of the next bag; f. returning to step b. The method and the device for one-time bag making and feeding by the folding film avoid the problem of cross contamination, and have the advantages of simple equipment structure, easy maintenance, low failure rate and small space occupation.

Description

Method and device for forming bags and applying bags on folded film once

Technical Field

The invention relates to the technical field of automatic dispensing equipment for granular preparations, in particular to a method and a device for one-time bag making and feeding of a folded film.

Background

The granular preparation is a traditional Chinese medicine preparation which is commonly used at present, and the granular preparation is required to be packaged into a medicine bag according to a prescription. At present, common granular preparation dispensing equipment using a folding film as a packaging bag generally has the problem of cross contamination during filling granular preparation, and a bag making machine is generally complex in structure, easy to break down and large in occupied volume.

Disclosure of Invention

The present invention provides a method and apparatus for disposable bag-on-bag of folded film to solve at least one of the above problems.

According to one aspect of the present invention, there is provided a method of disposable bag-on-bag folding film, comprising the steps of:

a. sealing the front ends of the two side surfaces of the folding film to form a front sealing edge of the bag to be prepared;

b. separating two side surfaces of a rear area of the front edge sealing on the folding film;

c. advancing the front hem seal on the folded film a set length and into the bag holder;

d. sealing two side surfaces of the part, which is away from the front edge, of the folding film and is wide by one bag, so as to form a sealing part;

e. the middle position of the sealing part is cut, the front side of the sealing part after cutting is the rear sealing edge of the previous bag, and the rear side is the front sealing edge of the next bag;

f. returning to step b.

In some embodiments, the method of the present invention after step c, the upper edges of the two sides of the doubled-over film in the bag holder are held apart with a gusset holding mechanism until either step d or step e ends.

According to another aspect of the present invention, there is provided a device for disposable bag-on-film folding, comprising a bag-on-film folding device and a bag holder; the folding film bag making device comprises a film separating piece, a film pushing mechanism, a sealing mechanism and a slitting mechanism; the film separating piece is used for separating the edges of the two side surfaces of the folded film; the film pushing mechanism is used for pushing the folded film with the front end edge sealed forward according to a set length and entering the bag holder; the edge sealing mechanism is used for sealing edges of the folded film which is pushed in place by the film pushing mechanism; the slitting mechanism is used for separating the bag subjected to edge sealing by the edge sealing mechanism from the folding film; the bag holder is for holding the shape of the bag, and has an opening on the side.

The method and the device for one-time bag making and feeding of the folded film avoid the problem of cross contamination in the filling process of the granular preparation, and have the advantages of simple equipment structure, easy maintenance, low failure rate and small space occupation. The "front end" means the forefront of the advancing direction of the folded film.

In some embodiments, the present invention further includes a film guide groove for defining a conveying path of the folded film; the film pushing mechanism comprises a film pushing piece and a film pushing driving mechanism for driving the film pushing piece to reciprocate; the film pushing piece is arranged in the film guiding groove or above the opening of the film guiding groove.

In some embodiments, the front end of the film pushing piece is V-shaped, the whole film pushing piece is L-shaped, and the free end extends vertically downwards or upwards. Therefore, the length of the free end can be increased, and the stress on the folded film in the film pushing process is uniform. "front end of the film pushing member" means the end of the film pushing member closest to the bag holder.

In some embodiments, the film separating member is arranged on the film pushing member and positioned at the rear end of the film pushing member. Thereby, the device structure is simpler.

In some embodiments, the edge sealing mechanism of the invention comprises a left clamping plate and a right clamping plate which are oppositely arranged, and an edge sealing driving mechanism for driving the left clamping plate and the right clamping plate to be separated and folded; the cutting mechanism comprises a cutter and a cutting driving mechanism for driving the cutter to reciprocate; the right clamping plate is provided with a through long cutter moving hole, the left clamping plate is provided with a cutter moving groove matched with the cutter moving hole in position, the cutter penetrates through the cutter moving hole, and the cutter tip of the cutter is positioned in the cutter moving groove.

In some embodiments, the pouch holder of the present invention comprises a main stand, a first subframe, a second subframe, and a bottom panel; the first auxiliary bracket is hinged with the right end of the main bracket, the second auxiliary bracket is hinged with the left end of the main bracket, and the bottom plate is arranged below the main bracket; the free ends of the first auxiliary bracket and the second auxiliary bracket are arranged to be separable and foldable; when the free ends of the first auxiliary bracket and the second auxiliary bracket are folded, a barrel-shaped accommodating space is formed with the main bracket and the bottom plate.

In some embodiments, the main support of the invention is provided with an arc-shaped left guide piece and an arc-shaped right guide piece, one end of the left guide piece is connected with one end of the right guide piece, and the convex surfaces are opposite.

In some embodiments, the first subframe and the second subframe of the present invention have arcuate cross sections, with concave surfaces disposed opposite each other.

In some embodiments, the present invention further comprises a first elastic member and a second elastic member, and a strut mechanism driving the free ends of the first subframe and the second subframe away; the first elastic component is arranged to apply force to the first auxiliary bracket in the direction of the second auxiliary bracket, and the second elastic component is arranged to apply force to the second auxiliary bracket in the direction of the first auxiliary bracket; the opening supporting mechanism comprises a supporting rod and a supporting head arranged at the front end of the supporting rod, and a supporting rod driving device for driving the supporting rod to reciprocate back and forth; the stay bar is connected with the bottom plate in a sliding way; the support head is arranged to push the free ends of the first sub-bracket and the second sub-bracket away.

In some embodiments, the present invention further comprises a spout retaining mechanism for retaining the upper edges of the two sides of the doubled-over film that enter the bag holder open. Thereby, the opening of the bag can be made larger.

In some embodiments, the port holding mechanism of the present invention includes left and right levers, and a lever drive mechanism; the left shifting lever comprises a left rotating shaft and a left rotating piece arranged on the left rotating shaft, and the right shifting lever comprises a right rotating shaft and a right rotating piece arranged on the right rotating shaft; the left-handed piece and the right-handed piece are oppositely arranged and are positioned above the bag retainer; the driving mechanism of the deflector rod is arranged to drive the left-handed member and the right-handed member to rotate from inside to outside and from outside to inside to above.

Drawings

FIG. 1 is a schematic view of a device for forming a bag on a bag at one time by folding a film according to an embodiment of the present invention;

FIG. 2 is a schematic view of a construction of a double-film bag making device of the device for making and applying bags once by double-film shown in FIG. 1;

FIG. 3 is a schematic view of another angle of the folding film bag making apparatus shown in FIG. 1;

FIG. 4 is a schematic view of a structure of the folding film bag making apparatus shown in FIG. 1 at another angle;

fig. 5 is a schematic view of a film pushing mechanism of a bag making device with double film according to an embodiment of the present invention;

FIG. 6 is a schematic view showing the structure of a bag holder of a device for disposable bag-on-bag folding with a film according to an embodiment of the present invention;

FIG. 7 is an exploded view of the bag holder of FIG. 6;

FIG. 8 is a schematic view of the main stand of the bag holder of FIG. 6;

FIG. 9 is a schematic view showing the structure of a mouth opening holding mechanism of a device for disposable bag making and feeding by folding film according to an embodiment of the present invention;

FIG. 10 is a schematic view of the mating arrangement of the spout retaining mechanism and bag retainer shown in FIG. 9;

FIG. 11 is a schematic view of the spout holding mechanism and bag holder of FIG. 9 in use;

fig. 12 to 14 are schematic structural views showing the use state of the device for forming a bag on a bag by folding a film once shown in fig. 1.

Fig. 15 is a schematic flow chart of a method for forming a bag on a bag at one time by folding a film according to an embodiment of the invention.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other.

Finally, it is further noted that relational terms such as first and second, and the like, counter-clockwise and clockwise, forward and reverse, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," comprising, "or" includes not only those elements but also other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.

The invention is described in further detail below with reference to the accompanying drawings.

Fig. 1 to 4 schematically show the structure of a device for disposable bag-on-bag production with a folded film according to an embodiment of the present invention.

Referring to fig. 1, the device for disposable bag-on-bag-in-half film comprises a device 300 for making a bag in half film, a bag holder 100 and a mouth-opening holding mechanism 200. The plurality of bag holders 100 are mounted on the turntable 400 for transfer, and the turntable 400 is provided with a plurality of mounting holes 410 of the bag holders 100. The bag holder 100 may also be mounted on a conveyor belt.

Referring to fig. 2 to 4, the folding film bagging apparatus 300 includes a film separating member 312, a film pushing mechanism 320, a banding mechanism 330, and a slitting mechanism.

The film guide groove 311 is used for defining a conveying path of the folded film 800, and the bottom of the film guide groove 311 can be arranged in a V shape with two sides extending vertically upwards for matching the shape of the folded film. In other embodiments, the bottom of the film guiding groove 311 may be provided in an arc shape or the like.

The film pushing mechanism is used for pushing the folded film with the front edge sealed forward by a set length and entering the bag holder 100. The film pushing mechanism 320 includes a film pushing member 321 and a film pushing driving mechanism 322 that drives the film pushing member 321 to reciprocate. The film pushing member 321 may be disposed in the film guiding groove 311 or over an opening of the film guiding groove 311. The length of pushing the folded film forward once is the width of the bag to be made. The rear edge of the last bag and the front edge of the next bag are sealed at the same time, and the film pushing member 321 pushes the folded film forward against the inner side of the front edge of the folded film 800.

Referring to fig. 5, in this embodiment, the front end of the film pushing member 321 is V-shaped, the film pushing member 321 is L-shaped as a whole, and the free end extends vertically downward. The length of the free end can be increased, and the stress on the folded film is uniform in the film pushing process. The front end of the film pushing piece 321 is V-shaped, and can be relatively attached to the front end of the folded film. In other embodiments, the front end of the membrane pushing member 321 may be configured in other shapes such as an arc shape, and the free end may also extend vertically upwards.

The film pushing driving mechanism 322 includes a timing belt, a driving gear and a driven gear engaged with the timing belt, and a motor for driving the gears to rotate. The film pushing member 321 is provided on the timing belt. The motor drives a driving gear to rotate, and the driving gear drives the synchronous belt to move, so that the film pushing piece 321 moves along with the synchronous belt.

In other embodiments, the film pushing member 321 may be configured as a vacuum suction nozzle, where the vacuum suction nozzle sucks two sides of the folded film, and the film pushing driving mechanism 322 drives the vacuum suction nozzle forward, where the vacuum suction nozzle sucks the folded film and pushes the folded film forward.

The film separating member 312 serves to separate edges of both sides of the folded film. The membrane separating member 312 may be disposed above the membrane guiding groove 311, and located between two sides of the folded membrane in use. In this embodiment, the film separating member 312 is disposed on the film pushing member 321 and located at the rear end of the film pushing member 321. The membrane separating piece 312 and the membrane pushing piece 321 are combined into a whole, so that the device structure is simpler. In other embodiments, the membrane separating member 312 may be separately and fixedly disposed at a certain position on the rear side of the membrane pushing member 321, and may be a cylindrical rod-shaped structure or a sheet-shaped structure, and when in use, is suspended above the folded membrane, and the lower end is located between two sides of the folded membrane. The edge banding mechanism 330 is used for banding the folded film of the film pushing mechanism 320, and comprises a left clamping plate 331 and a right clamping plate 332 which are oppositely arranged, and an edge banding driving mechanism 333 for driving the left clamping plate 331 and the right clamping plate 332 to be separated and folded. The heat seal heaters may be provided on both the left clamping plate 331 and the right clamping plate 332, or may be provided on either the left clamping plate 331 or the right clamping plate 332. When the left clamping plate 331 and the right clamping plate 332 are folded, the folded film is clamped, and the heat released by the heater (not shown) heat-seals the portion of the folded film 800 clamped by the left clamping plate 331 and the right clamping plate 332. The edge sealing driving mechanism comprises a left rack 3331, a right rack 3332, a third gear 3333 and an edge sealing driving device 3334; the left rack 3331 and the right rack 3332 are arranged opposite to each other and positioned at two sides of the third gear 3333 to be respectively meshed with the gears 3333; the edge sealing driving device 3334 drives the third gear 3333 to rotate; the left rack 3331 is connected to the left clamp 331, and the right rack 3332 is connected to the right clamp 332. In this embodiment, the left clamping plate 331 and the right clamping plate 332 share a set of driving means, so that the apparatus structure is simpler. In other embodiments, the left clamp plate 331 and the right clamp plate 332 may also be driven separately.

The slitting mechanism is used for separating the bag with the edge sealed at the rear end from the folding film with the edge sealed at the front end. The slitting mechanism 340 includes a cutter 341 and a slitting driving mechanism 342 driving the cutter 341 to reciprocate. The right clamping plate 332 is provided with a long through cutter moving hole, the left clamping plate 331 is provided with a cutter moving groove 3311 which is matched with the position of the cutter moving hole, the cutter 341 penetrates through the cutter moving hole, and the cutter tip of the cutter 341 is positioned in the cutter moving groove 3311. The cutter hole is arranged on the clamping plate, the cutter 341 moves back and forth in the cutter hole, the film cutting effect is better, and the device structure is simpler.

The edge banding mechanism 340 can simultaneously edge band the back end of the previous bag with the front end of the folded film in one edge banding operation. The cutter 341 penetrates through a cutter-moving hole formed in the right clamping plate 332, and the slitting mechanism performs slitting operation once to separate the bag sealed at the rear end from the folding film sealed at the front end.

The slitting drive mechanism 342 includes a timing belt, a driving gear and a driven gear engaged with the timing belt, and a motor that drives the gears to rotate. The cutter 341 is provided on the timing belt. The motor drives a driving gear to rotate, the driving gear drives the synchronous belt to move, and the cutter moves along with the synchronous belt.

Fig. 6 to 8 schematically show the structure of a bag holder of a device for disposable bag-on-bag production with a folded film according to an embodiment of the present invention.

Referring to fig. 6 to 8, the bag holder includes a main bracket 110, a first sub-bracket 121, a second sub-bracket 122, and a bottom plate 130, and a mouth opening mechanism.

The first sub-bracket 121 is hinged to the right end of the main bracket 110, the second sub-bracket 122 is hinged to the left end of the main bracket 110, and the bottom plate 130 is disposed below the main bracket 110.

The free ends of the first sub-mount 121 and the second sub-mount 122 are provided to be separable and foldable. When the free ends of the first sub-bracket 121 and the second sub-bracket 122 are closed, a barrel-shaped accommodating space is formed with the main bracket 110 and the bottom plate 130. The folding film 800 can enter the bag holder 100 from the side, and has simple structure, convenient operation and small occupied space.

Two first elastic members 151 are provided at the hinge of the main bracket 110 and the first sub-bracket 121, and two second elastic members 152 are provided at the hinge of the main bracket 110 and the second sub-bracket 122. In the present embodiment, the first elastic member 151 and the second elastic member 152 are torsion springs. The first elastic member 151 is provided to urge the first sub-mount 121 in the second sub-mount direction, and the second elastic member is provided to urge the second sub-mount 122 in the first sub-mount 121 direction. The default state of the first elastic member 151 and the second elastic member 152 is to close the free ends of the first sub-mount 121 and the second sub-mount 122.

The bracing mechanism 140 may drive the free ends of the first and second sub-frames 121, 122 away. The mouth opening mechanism 140 includes a stay 142 and a stay head 141 provided at the front end of the stay. The stay 142 is disposed below the base plate 130 and slidably coupled to the base plate 130. A third elastic member 153 is provided between the bottom plate 130 and the stay 142, and the third elastic member 153 is provided to urge the stay 142 in the direction of the main support 110. In this embodiment, the third elastic member 153 is a tension spring or a compression spring sleeved outside the stay 142. In other embodiments, the third elastic member 153 may be an elastic member such as a pneumatic cylinder or a hydraulic cylinder, or may apply force to the support rod 142 in the direction of the main support 110 by using magnetism of a magnet to return the support rod 142.

The stay 141 is arranged to push the free ends of the first and second sub-frames 121, 122 away. The pulleys 143 are respectively arranged at the two ends of the supporting head 141, and the pulleys 143 are contacted with the free ends of the first auxiliary bracket 121 and the second auxiliary bracket 122 in the process that the supporting head 141 pushes the free ends of the first auxiliary bracket 121 and the second auxiliary bracket 122 to be far away, so that the friction force between the supporting head 141 and the first auxiliary bracket 121 and the friction force between the supporting head 141 and the second auxiliary bracket 122 can be reduced, and the device can run more stably.

In this embodiment, the free ends of the first sub-bracket 121 and the second sub-bracket 122 are closed by the elastic force of the elastic member, and the separation is performed by the function of the opening supporting mechanism. In other embodiments, a driving mechanism capable of being pushed and pulled may be disposed between the first sub-frame 121 and the second sub-frame 122 to close or separate the free ends of the first sub-frame 121 and the second sub-frame 122.

The edge of the first sub-bracket 121 opposite to the free end of the second sub-bracket 122 is provided with a rubber pad 160. Thereby, the position of the other side edge of the bag can be better defined while reducing damage to the bag by the sub-rack.

Referring to fig. 8, in the present embodiment, the top of the main bracket 110 is provided with an arc-shaped left guide 111 and right guide 112, one ends of the left guide 111 and right guide 112 are connected, and convex surfaces are disposed opposite to each other. This can better define the position of one side of the folded film 800 because the side of the folded film 800 is soft and the folded film 800 is easily folded during the process of entering the bag holder 100, and the provision of the curved left and right guide members 111 and 112 on the main frame 110 can prevent the folded film 800 from being stuck at the corner and thus causing the upper bag to be out of place. The lower portion of the main support 110 may be provided with a U-shaped or V-shaped receiving space. In other embodiments, the positional relationship of the left guide 111 and the right guide 112 may also be set in a V shape.

Referring to fig. 7, in the present embodiment, the first sub-mount 121 and the second sub-mount 122 have arc-shaped cross sections, and concave surfaces are disposed opposite to each other. Thereby, the shape of the upper end opening of the bag 100 can be better maintained. In other embodiments, the cross-sections of the first and second sub-brackets 121, 122 may also be planar.

Referring to fig. 7, in the present embodiment, the longitudinal section of the bottom plate 130 is V-shaped. Thereby, the position of the bottom edge of the bag can be better defined. In other embodiments, the longitudinal cross-section of the base 130 may also be planar or arcuate.

To use the present pouch holder 100, the stay 142 may be pushed by an external force, the stay 141 is moved forward, the pulley 143 is in contact with the free ends of the first and second sub-brackets 121 and 122, the free ends of the first and second sub-brackets 121 and 122 are pushed to be separated, the folding film 800 is inserted into the pouch holder from between the free ends of the first and second sub-brackets 121 and 122, the front side of the folding film 800 is in contact with the main bracket 110, and the bottom side of the folding film 800 is in contact with the bottom plate 801. At this time, the external force is released, and the free ends of the first sub-frame 121 and the second sub-frame 122 are closed by the first elastic member 151 and the second elastic member 152, so that the bag 801 is kept in the upright state.

In other embodiments, the bag holder 100 may be a barrel structure with other sides having openings.

Fig. 9 schematically shows the structure of the opening holding mechanism of the device for disposable bag-on-bag production with a folded film according to an embodiment of the present invention.

The spout holding mechanism 200 serves to hold open the upper edges of both sides of the folded film that enter the bag holder 100. Referring to fig. 9, the port holding mechanism may include left and right levers 210 and 220, and a lever driving mechanism.

The left lever 210 includes a left rotation shaft 211 and left rotation members 221 provided on the left rotation shaft, and the left rotation members 221 are in the shape of a rod and two in number. The right shift lever 220 includes a right rotation shaft 212 and right rotation members 222 disposed on the right rotation shaft, and the number of the right rotation members 222 is two. The left rotation shaft 211 and the right rotation shaft 212 are horizontally disposed in parallel with each other. The left-handed member 221 and right-handed member 222 are disposed opposite each other above the bag holder 100 in a staggered arrangement. In other embodiments, the left-handed member 221 and the right-handed member 222 may be configured to have a sheet-like or cone-like shape, and the left lever 210 and the right lever 220 may be moved in an outward and downward manner to prop open the two sides of the folded film.

The lever driving mechanism is configured to drive the left-handed member 221 and the right-handed member 222 to rotate from inside to outside and from outside to inside to above.

The lever drive mechanism includes a main gear 230, a left gear 231, a right gear 232, and a lever drive 240. The lever driving device 240 drives the main gear 230 to rotate, the left gear 231 is engaged with the main gear 230, and the right gear 232 is engaged with the left gear 231.

In this embodiment, the lever drive 240 is an electric motor. In other embodiments, the lever driving device 240 may be a driving device such as a pneumatic cylinder, a hydraulic cylinder, or an electromagnetic relay.

The left gear 231 is connected to the left rotation shaft 211, and the right gear 232 is connected to the right rotation shaft 212.

When the initial positions of the left-hand piece 221 and the right-hand piece 222 are horizontal and the driving device 240 drives the main gear 230 to rotate clockwise, the main gear 230 drives the left gear 231 to rotate anticlockwise and the left-hand piece 221 rotates downwards and outwards; the left gear 231 is brought to the right gear 231 to rotate clockwise and the right hand member 222 is rotated downwardly and outwardly. The left-hand piece 221 and right-hand piece 222 gradually expand and hold the opening of the bag during the downward and outward rotation. When the driving device 240 drives the main gear 230 to rotate anticlockwise, the main gear 230 drives the left gear 231 to rotate clockwise, the left gear 231 drives the right gear to rotate anticlockwise, and the left rotary member 221 and the right rotary member 222 rotate inwards and upwards to return to the initial positions.

Fig. 10 and 11 schematically illustrate the mating arrangement of the spout retaining mechanism and bag holder shown in fig. 9.

Referring to fig. 10 and 11, the stay driving means 250 drives the gear 251 to rotate, the gear 251 drives the rack 252 to move forward, the rack 252 pushes the stay 142, the stay 141 moves forward, the pulley 143 contacts the free ends of the first and second sub-frames 121 and 122, the free ends of the first and second sub-frames 121 and 122 are pushed to be separated, the front end edge-sealed folding film 800 may be inserted into the bag holder 100 from between the free ends of the first and second sub-frames 121 and 122, the front end of the folding film 800 contacts the main frame 110, and the bottom edge of the folding film 800 contacts the bottom plate 130. At this time, the lever driving means 240 drives the main gear 230 to rotate clockwise, the main gear 230 brings the left gear 231 to rotate counterclockwise, and the left rotary member 221 rotates downward and outward; the left gear 231 is brought to the right gear 231 to rotate clockwise and the right hand member 222 is rotated downwardly and outwardly. In the process of rotating the left-handed member 221 and the right-handed member 222 downward and outward, the left-handed member 221 and the right-handed member 222 each support one side edge of the folded film 800 from inside to outside, so that the distance between the two side edges of the folded film 800 is gradually increased and maintained.

Referring to fig. 11, the stay driving device 250 drives the gear 251 to rotate reversely, the gear 251 drives the rack 252 to move backward, the stay 142 is moved backward and restored by the third elastic member 153, and the free ends of the first sub-frame 121 and the second sub-frame 122 are respectively closed by the first elastic member 151 and the second elastic member 152, so that the bag 801 can be kept in an upright state. At this time, the driving lever driving device 240 drives the main gear 230 to rotate counterclockwise, the main gear 230 drives the left gear 231 to rotate clockwise, the left gear 231 drives the right gear to rotate counterclockwise, and the left rotary member 221 and the right rotary member 222 rotate inward and upward to return to the initial positions.

In this embodiment, the stay driving device 250 is an electric motor. In other embodiments, the strut driving device 250 may be a driving device such as a pneumatic cylinder, a hydraulic cylinder, or an electromagnetic relay.

Fig. 12 to 14 schematically show the operation of the apparatus for disposable bag-on-bag production with a folded film according to an embodiment of the present invention.

Referring to fig. 12, in the preparation process of the bag, the folded film roll 500 is first mounted on the unreeling shaft 392 of the unreeling device, and the front end of the folded film 800 passes through the film guiding roller 391 and then passes through the film guiding groove 311 to between the left clamping plate 331 and the right clamping plate 332. The film pushing member 321 is placed between the two sides of the folded film 800 to separate the two sides of the folded film. The heater is heated to the heat-sealing temperature, the left clamping plate 331 and the right clamping plate 332 are driven to be folded, and the two side surfaces of the front end of the folding film 800 are heat-sealed to form a front sealing edge of the bag to be prepared.

A plurality of bag holders 100 are mounted on the turntable with the left hand piece 221 and right hand piece 222 of the mouth holding mechanism 200 being located above the bag holder 100 closest to the double film bagging apparatus 300.

Referring to fig. 13, the left clamp plate 331 and the right clamp plate 332 of the banding mechanism 330 are separated, and the opening mechanism drives the free ends of the first sub bracket 121 and the second sub bracket 122 of the bag holder 100 away. The unreeling shaft 392 unreels, and the film pushing driving mechanism 322 drives the film pushing member 321 to move forward, the front end of the film pushing member 321 moves forward by a set length against the front edge seal of the folded film 800, and enters the bag holder 100 until the front end of the folded film 800 abuts against the main support 110 of the bag holder 100.

The left-hand piece 221 of the mouth holding mechanism 200 rotates downward and outward to support the left side of the folded film in the bag holder 100 from the inside; the right-hand member 222 rotates downwardly and outwardly to support the right of the doubled-over film in the bag holder 100 from the inside.

Referring to fig. 14, the film pushing driving mechanism 322 drives the film pushing member 321 to move backward, and the film separating member 312 at the rear end of the film pushing member 321 simultaneously separates both side surfaces of the folded film on the rear side. The free ends of the first and second sub-frames 121, 122 of the bag holder 100 are simultaneously closed.

The banding driving mechanism 333 drives the left and right clamping plates 331 and 332 to close, and the portion of the folded film 800 clamped by the left and right clamping plates 331 and 332 is heat-sealed. The two sides of the part of the folded film, which is away from the front edge by one bag width, are sealed to form a sealing part.

The slitting driving mechanism 342 drives the cutter 341 to move along the cutter hole at the same time, and performs slitting operation at the middle position of the sealing part, wherein the front side of the slit sealing part is the rear edge sealing of the previous bag, and the rear side is the front edge sealing of the next bag, that is, the bag 801 with two edges sealed is slit from the folding film 800 with the front edge sealed.

The left hand piece 221 of the stay mechanism 200 rotates upward and inward, and the right hand piece 222 rotates upward and inward, returning to the original horizontal position. The upper end opening of the bag 801 remains open due to the shaping action of the bag holder 100.

After the slitting operation is completed, the turntable 400 moves the bag holder 100 to the filling station of the next process, and the granular formulation can be dropped directly into the bag from the opening at the upper end of the bag 801.

The steps are repeated, the bag making and loading operation of the bag can be completed once, the working efficiency is high, and cross contamination can be avoided.

The left-hand piece 221 and the right-hand piece 222 of the mouth holding mechanism 200 may be restored to the original positions after the free ends of the first sub-bracket 121 and the second sub-bracket 122 of the bag holder 100 are closed, and may be restored to the original positions after the closing operation of the banding mechanism 330.

Fig. 15 schematically shows a flow of a method for disposable bag-on-bag with a folded film according to an embodiment of the present invention.

Referring to fig. 15, in which,

in step S101, the front ends of both sides of the folded film are sealed to form a front sealing edge of the bag to be prepared;

in step S102, separating two side surfaces of a rear area of a front edge seal on the folded film;

advancing the front hem on the folded film by a set length and into the bag holder at step S103;

in step S104, two sides of the part, which is away from the front edge, of the folded film and is one bag width, are sealed to form a sealing part;

in step S105, a slitting operation is performed at the middle position of the sealing portion, where the front side of the slit sealing portion is the rear edge seal of the previous bag, and the rear side is the front edge seal of the next bag;

returning to step S102.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims

1. The device for one-time bag making and bag feeding by the folding film is characterized by comprising a bag making device by the folding film and a bag retainer;

the folding film bag making device comprises a film separating piece, a film pushing mechanism, a sealing mechanism and a slitting mechanism;

the membrane separating piece is used for separating edges of two side surfaces of the folded membrane;

the film pushing mechanism is used for pushing the folded film with the front end edge sealed forwards according to a set length and entering the bag holder;

the edge sealing mechanism is used for sealing edges of the folded film which is pushed in place by the film pushing mechanism;

the slitting mechanism is used for separating the bag with the edge sealed at the rear end from the folding film with the edge sealed at the front end;

the bag holder is used for holding the shape of the bag, and the side surface is provided with an opening;

the bag holder comprises a main bracket, a first auxiliary bracket, a second auxiliary bracket and a bottom plate;

the first auxiliary bracket is hinged with the right end of the main bracket, the second auxiliary bracket is hinged with the left end of the main bracket, and the bottom plate is arranged below the main bracket;

the free ends of the first auxiliary bracket and the second auxiliary bracket are arranged to be separable and foldable;

when the free ends of the first auxiliary bracket and the second auxiliary bracket are folded, a barrel-shaped accommodating space is formed with the main bracket and the bottom plate;

the device also comprises a first elastic component, a second elastic component and a port supporting mechanism for driving the free ends of the first auxiliary bracket and the second auxiliary bracket to be far away;

the first elastic component is arranged to apply force to the first auxiliary bracket in the direction of the second auxiliary bracket, and the second elastic component is arranged to apply force to the second auxiliary bracket in the direction of the first auxiliary bracket;

the opening supporting mechanism comprises a supporting rod and a supporting head arranged at the front end of the supporting rod, and a supporting rod driving device for driving the supporting rod to reciprocate back and forth;

the stay bar is connected with the bottom plate in a sliding way;

the support head is arranged to push the free ends of the first auxiliary bracket and the second auxiliary bracket away.

2. The apparatus of claim 1, further comprising a film guide slot for defining a transport path for the folded film;

the film pushing mechanism comprises a film pushing piece and a film pushing driving mechanism for driving the film pushing piece to reciprocate;

the film pushing piece is arranged in the film guiding groove or above the opening of the film guiding groove.

3. The device according to claim 2, wherein the front end of the film pushing member is V-shaped, the whole body is L-shaped, and the free end extends vertically downward or upward;

the membrane separating piece is arranged on the membrane pushing piece and is positioned at the rear end of the membrane pushing piece.

4. A device according to any one of claims 1 to 3, wherein the edge sealing mechanism comprises a left clamping plate and a right clamping plate which are oppositely arranged, and an edge sealing driving mechanism for driving the left clamping plate and the right clamping plate to be separated and folded;

the cutting mechanism comprises a cutter and a cutting driving mechanism for driving the cutter to reciprocate;

the right clamping plate is provided with a through long cutter-moving hole, the left clamping plate is provided with a cutter-moving groove matched with the cutter-moving hole in position, the cutter penetrates through the cutter-moving hole, and the cutter tip of the cutter is positioned in the cutter-moving groove.

5. A device according to any one of claims 1 to 3, wherein the main support is provided with an arc-shaped left guide member and a right guide member, one end of the left guide member and one end of the right guide member are connected, and convex surfaces are arranged oppositely; the cross sections of the first auxiliary bracket and the second auxiliary bracket are arc-shaped, and concave surfaces are arranged oppositely.

6. A device according to any one of claims 1 to 3, further comprising a spout retaining mechanism for retaining open the upper edges of the two sides of the doubled-over film entering the bag holder;

the opening supporting and retaining mechanism comprises a left deflector rod, a right deflector rod and a deflector rod driving mechanism;

the left shifting lever comprises a left rotating shaft and a left rotating piece arranged on the left rotating shaft, and the right shifting lever comprises a right rotating shaft and a right rotating piece arranged on the right rotating shaft;

the left-handed piece and the right-handed piece are oppositely arranged and are positioned above the bag retainer;

the driving mechanism of the deflector rod is arranged to drive the left-handed member and the right-handed member to rotate from inside to outside and from outside to inside to above.

7. A method for disposable bag making and feeding by folding films, which comprises the device for disposable bag making and feeding by folding films according to any one of claims 1 to 6, and comprises the following steps:

f. returning to step b.

8. The method of claim 7, wherein,

after said step c, the upper edges of the two sides of the folded film in the bag holder are kept separate by the stay holding mechanism until the step d or e ends.