CN113211873A

CN113211873A - Inner bag and outer bag bonding mechanism of double-layer bag and inner bag and outer bag bonding method of double-layer bag

Info

Publication number: CN113211873A
Application number: CN202110561192.3A
Authority: CN
Inventors: 王凤兰
Original assignee: Guangdong Jiayu Machinery Technology Co ltd
Current assignee: Kuang Xuewei
Priority date: 2021-05-21
Filing date: 2021-05-21
Publication date: 2021-08-06

Abstract

The invention discloses an inner bag and outer bag bonding mechanism of a double-layer bag and an inner bag and outer bag bonding method of the double-layer bag. The mechanism comprises: the device comprises a base, a first sucker, a second sucker, a connecting device and a third sucker. The first sucker is arranged on the base in a manner of moving up and down and is used for operating the outer bag; the second sucker is arranged on the base in a manner of moving up and down and is used for operating the outer side surface of the inner bag; the third sucker is arranged on the base in a manner of moving back and forth and is used for operating the inner side surface of the inner bag; the connecting device is used for bonding the inner bag and the outer bag of the double-layer belt, and the connecting device and the third suction cup are integrally arranged and move synchronously. The joint device of the inner bag and outer bag bonding mechanism of the double-layer bag can be arranged together with the third suction cup and can bond the outer bag and the inner bag from the inner side of the inner bag of the double-layer bag, so that the whole action of bonding the outer bag and the inner bag is reduced, and the production efficiency and the stability are obviously improved.

Description

Inner bag and outer bag bonding mechanism of double-layer bag and inner bag and outer bag bonding method of double-layer bag

Technical Field

The invention relates to the field of packaging bag processing equipment, in particular to an inner bag and outer bag bonding mechanism of a double-layer bag and an inner bag and outer bag bonding method of the double-layer bag.

Background

The double-layer bag is mainly applied to products which are easy to be affected with damp, such as chemical raw materials, various chemical fertilizers, food raw material additives, animal feeds and the like. The outer bag body is generally a woven bag (PP material), a BOPP film-coated bag, a film-coated bag or a paper-plastic composite bag. The inner bag body adopts a PE film which is divided into an LDPE low-pressure film and an HDPE high-pressure film. At present, the double-layer bag is generally sealed by ultrasonic waves manually, but the ultrasonic waves have certain damage to human bodies due to long-term noise and radiation. Moreover, the bag sealing mode also needs manual sealing, but the manual repeated action consumes huge physical strength, and the special sealing action needs professional training before the post work.

In addition, the double-layer bag is manufactured by heating and sealing an opening at one end of the inner bag body and then sleeving the opening into the outer bag body. The opening ends of the inner bag body and the outer bag body are mutually jointed by heating or adhering treatment.

Therefore, the production process of the equipment for producing the double-layer bag in the prior art is complex, the structure is complex, and the stability and the production efficiency of the equipment are affected. Therefore, it is an urgent need to solve the technical problem of providing a double-layer bag manufacturing apparatus with simple production process and structure.

Disclosure of Invention

In this summary, concepts in a simplified form are introduced that are further described in the detailed description. This summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

In order to at least partially solve the aforementioned technical problem, the present invention provides a mechanism for bonding an inner bag and an outer bag of a double bag, the mechanism comprising:

a base;

the first sucker is arranged on the base in a vertically movable mode and used for operating the outer bag;

the second sucker is arranged on the base in a vertically movable mode and used for operating the outer side surface of the inner bag;

the third sucker is arranged on the base in a manner of moving back and forth and is used for operating the inner side surface of the inner bag;

the joint device is used for bonding the inner bag and the outer bag of the double-layer belt, and the joint device and a third suction cup are integrally arranged and move synchronously.

In an embodiment, the first suction cup comprises: a first upper sucker which is arranged on the base in a manner of moving up and down; and the first lower sucker is arranged on the base in a vertically movable mode, and the first upper sucker can be selectively attached to the first lower sucker.

In an embodiment, the second chuck comprises: a second upper suction cup which is arranged on the base in a manner of moving up and down; the second lower sucker can be arranged on the base in a vertically moving mode, and the second upper sucker can be selectively attached to the second lower sucker.

In an embodiment, the third suction cup is movable between the first upper suction cup and the first lower suction cup or between the second upper suction cup and the second lower suction cup.

In an embodiment, the second upper suction cup is fixedly connected with the first upper suction cup, and/or

The second lower sucker is fixedly connected with the first lower sucker.

In an embodiment, the first step

An upper sucker is provided with a second sucker adjusting seat; the second upper sucker is connected with the second sucker adjusting seat, and the relative position between the second upper sucker and the first upper sucker is adjusted by adjusting the position of the second upper sucker on the second sucker adjusting seat; and/or

The first lower sucker is provided with a second sucker adjusting seat; the second lower sucker is connected with the second sucker adjusting seat, and the position of the second lower sucker on the second sucker adjusting seat is adjusted to adjust the relative position between the second lower sucker and the first lower sucker.

In an embodiment, the first upper suction cup and the first lower suction cup are slidably disposed on a first guide rail disposed on the base along an up-down direction.

In an embodiment, the second suction cup and the third suction cup are externally connected with the same negative pressure device.

In an embodiment, the inner bag and outer bag bonding mechanism of the double-layer bag further comprises a first driving device, the first driving device is arranged on the base, and the first driving device is used for driving the first suction cup and the second suction cup.

In an embodiment, the first driving means comprises at least one of a servo motor and a cylinder.

In an embodiment, the inner bag and outer bag bonding mechanism of the double-layer bag further comprises a synchronizing wheel, a cam transmission shaft and a cam;

the two synchronizing wheels are respectively arranged corresponding to the first upper sucker and the first lower sucker and are in transmission connection with the cam transmission shaft, and the cam is sleeved on the cam transmission shaft;

the first upper sucker and the first lower sucker are respectively connected with the corresponding cam;

the first driving device is in transmission connection with the two synchronizing wheels.

In an embodiment, the joining device comprises at least one of a heat sealing knife, a heat fusion machine, and an ultrasonic sealer.

In an embodiment, the joining device is a heat sealing knife comprising:

a knife sealing base;

the cutter sealing base plates are respectively positioned on the upper side and the lower side of the cutter sealing base and can move relative to the cutter sealing base;

the cutter sealing teeth are respectively arranged on the upper side and the lower side of the cutter sealing base along the vertical direction, and at least part of the cutter sealing teeth are positioned between the cutter sealing base and the cutter sealing base plate;

a heating element located within the seal cutter base, the heating element for heating the seal cutter teeth;

the knife sealing base plate is provided with a plurality of openings, and when the knife sealing base plate moves relative to the knife sealing base plate, at least part of the knife sealing teeth penetrate through the openings of the knife sealing base plate and are exposed out of the knife sealing base plate.

In an embodiment, the knife sealing substrate is connected with the knife sealing base through an elastic member, so that the knife sealing substrate can move relative to the knife sealing base under the action of an external force and reset under the action of no external force.

In an embodiment, the heat seal sealing knife further comprises a protection plate located on one side of the outer surface of the sealing knife substrate.

In an embodiment, the heat sealing knife further comprises a cooling device, and the cooling device is used for reducing the temperature of the protection plate and the sealing knife substrate.

In an embodiment, the inner bag and outer bag bonding mechanism of the double-layer bag further comprises a unfolding device for flattening the inner bag when the third suction cups are at least partially positioned in the inner bag.

In an embodiment, the deployment device comprises:

a deployment device base slidably disposed on the base;

two unfolding arms located on two sides of the third suction cup;

a third drive device disposed on the deployment device base, the third drive device for driving the deployment arm.

In an embodiment, the third driving device is a servo motor or an air cylinder.

In an embodiment, the inner bag and outer bag bonding mechanism of the double-layer bag comprises a second slide rail, and the second slide rail is arranged on the base along the front-back direction; the third sucker is arranged on the second sliding rail in a sliding mode.

In an embodiment, the inner bag and outer bag bonding mechanism of the double-layer bag comprises a second driving device for driving the third suction cup.

In an embodiment, the second driving device is a servo motor or a cylinder.

In an embodiment, the inner bag and outer bag bonding mechanism of the double-layer bag further comprises an inner bag flattening device, the inner bag flattening device is located on the upper seat of the base, and the inner bag flattening device is used for flattening the outer bag and the inner bag by blowing air.

In an embodiment, the suction surfaces of the second upper suction cup and the second lower suction cup are provided with a plurality of grooves along the transverse direction and the longitudinal direction, the suction surfaces are divided into a plurality of areas by the plurality of grooves, and the suction holes are arranged in the areas.

The invention also discloses a method for bonding the inner bag and the outer bag of the double-layer bag, which is applied to the bonding mechanism for the inner bag and the outer bag of the double-layer bag and is characterized by comprising the following steps:

feeding: conveying the double-layer bag to the base by using a conveying device, wherein an opening of an inner bag of the double-layer bag and an opening of an outer bag are positioned on the same side, and one end of the opening of the inner bag protrudes out of one end of the opening of the outer bag to form a protruding part;

opening: the first lower suction cup of the first suction cup sucks the lower side surface of the outer bag, and the first upper suction cup sucks the upper side surface of the outer bag and moves upwards; the second lower sucker sucks the lower side surface of the protruding part of the inner bag, and the second upper sucker sucks the upper side surface of the protruding part of the inner bag and moves upwards;

positioning: the third sucker moves into the inner bag and sucks the inner surface of the inner bag, the second sucker cancels adsorption at the moment, and the third sucker moves towards the inner part of the outer bag until the opening of the inner bag is aligned with the opening of the outer bag;

bonding: and after the third suction cup moves towards the inside of the outer bag until the opening of the inner bag is aligned with the opening of the outer bag, at least the first upper suction cup moves downwards and presses the joint device downwards, and the joint device bonds the outer bag and the inner bag.

In an embodiment, further comprising the step of:

discharging: after the outer bag and the inner bag are bonded, the first sucking disc and the third sucking disc are not sucked and return to the original positions, and the double-layer bag is transferred to a material receiving position by the aid of the conveying device.

In an embodiment, the engaging means is integrally provided with the third suction cup and moves synchronously with the third suction cup.

In an embodiment, the joining device is a heat sealing knife comprising:

a knife sealing base;

In an embodiment, the positioning step comprises: the third sucker moves into the inner bag, the unfolding device flatly supports the inner bag, the third sucker sucks the inner surface of the inner bag, the second sucker cancels adsorption at the moment, and the third sucker moves towards the inner part of the outer bag until the opening of the inner bag is aligned with the opening of the outer bag.

In an embodiment, the deployment device comprises:

a deployment device base slidably disposed on the base;

two unfolding arms located on two sides of the third suction cup;

Compared with the arrangement mode that the joint device of the bonding mechanism is positioned at the outer side of the outer bag in the prior art, the joint device of the inner bag and the outer bag bonding mechanism of the double-layer bag can be arranged together with the third sucker and can bond the outer bag and the inner bag from the inner side of the inner bag of the double-layer bag, so that the technical problems mentioned in the background technology are avoided, the whole action of bonding the outer bag and the inner bag is reduced, and the production efficiency and the stability are obviously improved.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the invention are not so limited in scope. The embodiments of the invention include many variations, modifications and equivalents within the spirit and scope of the appended claims.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a perspective view of a bonding mechanism for inner and outer bags of a double-layered bag according to an embodiment of the present invention;

FIG. 2 is a top view of an inner bag and outer bag bonding mechanism of a double-layered bag according to an embodiment of the present invention;

FIG. 3 is a side view of an inner and outer bag bonding mechanism for a two-layered bag as disclosed in an embodiment of the present invention;

FIG. 4 is a left side view of the inner and outer bag bonding mechanism of the disclosed double-layered bag;

FIG. 5 is a schematic structural diagram of a main body portion of an inner bag and outer bag bonding mechanism of a double-layer bag according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a sealing knife of an inner bag and outer bag bonding mechanism of a double-layer bag according to an embodiment of the present invention;

FIG. 7 is a flowchart illustrating a method for bonding an inner bag and an outer bag of a double-layered bag according to an embodiment of the present invention;

fig. 8 is a schematic structural view of a double-layered bag according to an embodiment of the present invention.

Legend: the vacuum suction device comprises a base 10, an upper seat 11, a lower seat 12, an E-shaped structure 13, a first suction cup 20, a first upper suction cup 21, a first lower suction cup 22, a first servo motor 23, a first slide rail 24, a cutter pad 25, a second suction cup 30, a second upper suction cup 31, a second lower suction cup 32, a synchronizing wheel 33, a cam transmission shaft 34, a cam 35, a shaft support 36, a second suction cup adjusting support 37, a third suction cup 40, a second slide rail 41, a second servo motor 42, a third suction cup support 43, a sealing knife 50, a sealing knife support 51, a sealing knife substrate 52, a spring 53, a sealing knife tooth 54, a copper plate 55, a cooling device 56, a heating device 57, a spreading device 60, a spreading device support 61, a spreading arm 62, a swing arm 63, a spreading adjusting screw rod 64, a driving device 65, an inner bag blowing-flattening device 70, a double-layer bag 80, an outer bag 81, an inner bag 82, a protruding part 83, a vacuum negative pressure joint 90.

Detailed Description

The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, it should be understood that these embodiments are merely illustrative of the present invention and are not intended to limit the scope of the present invention, and various equivalent modifications of the present invention by those skilled in the art after reading the present invention fall within the scope of the appended claims.

Examples

Referring to fig. 1-6, an embodiment of the present invention discloses a bonding mechanism for an inner bag and an outer bag of a double-layered bag. The inner bag and outer bag bonding mechanism of the double-layer bag mainly comprises a base 10, a first suction cup 20, a second suction cup 30, a third suction cup 40, a jointing device 50 and the like. Compared with the arrangement mode that the joint device 50 of the bonding mechanism is positioned at the outer side of the outer bag 81 in the prior art, the joint device 50 of the inner bag and outer bag bonding mechanism of the double-layer bag can be arranged together with the third suction cup 40 and can bond the outer bag 81 and the inner bag 82 from the inner side of the inner bag 82 of the double-layer bag 80, so that the technical problems mentioned in the background technology are avoided, the action of bonding the outer bag 81 and the inner bag 82 is reduced, and the production efficiency and the stability are obviously improved.

Referring to fig. 8, a double-layered bag 80 according to the present invention has an inner bag 82 and an outer bag 81. The same ends of the inner bag 82 and the outer bag 81 are respectively provided with an opening, and the other ends are closed. The inner bag 82 may be disposed inside the outer bag 81 and the open ends of the inner bag 82 and the outer bag 81 may be connected together. In this embodiment, the outer bag 81 may be a woven bag of PP polypropylene, and the inner bag 82 may be a bag of PE film. Bonding means that the outer bag 81 and the inner bag 82 can be broken by heating and fused together after cooling. The design mode of the outer bag 81 and the inner bag 82 ensures that the double-layer bag 80 has certain strength and simultaneously can enable the materials filled in the bag to be isolated from the outside, thereby realizing the effect of sealing and moisture protection.

Referring to fig. 1, a base 10 of an inner bag and outer bag bonding mechanism of a double-layered bag may generally include an upper seat 11 and a lower seat 12. The vertical direction in this embodiment is the vertical direction of the plane of the paper. Both sides of the base 10 may be provided with a similar E-shaped structure 13, respectively. The upper two laterally disposed structures of the E-shaped structure 13 may be the upper seats 11, and the lower one laterally disposed structure of the E-shaped structure 13 may be the lower seats 12. For example, the lower portions of two E-like structures 13 are joined together to form a lower seat 12 structure, and the remaining structure is an upper seat 11. The middle of the two E-shaped structures 13 may be respectively provided with various components, such as a first suction cup 20, a second suction cup 30, a third suction cup 40, and a coupling device 50. However, the base 10 of the present application is not limited to the structure of the embodiment, and the shape of the base 10 may be changed according to actual needs.

The first suction tray 20 serves to suck the outer bag 81 and lift or lower the sucked outer bag 81. The first suction pad 20 may be provided on the base 10, and may be located at a front position of the upper seat 11 of the base 10. In this embodiment, the direction away from the third suction cup 40 is the front, and the direction close to the third suction cup 40 is the rear.

The first suction cup 20 may include a first upper suction cup 21 and a first lower suction cup 22. The first upper suction cup 21 and the first lower suction cup 22 are disposed opposite to each other, and a plurality of suction holes may be respectively disposed on two opposite side surfaces. The first upper suction plate 21 and the first lower suction plate 22 are movable up and down with respect to the upper base 11. The first upper suction cup 21 is selectively attached to the first lower suction cup 22. The first suction tray 20 is used to suck the outer bag 81 of the double-layered bag 80. Specifically, the first upper suction cup 21 sucks the upper side surface of the outer bag 81 through the suction hole, and the first lower suction cup 22 sucks the lower side surface of the outer bag 81 through the suction hole. The first upper suction cup 21 can move downwards until it abuts against the first lower suction cup 22 or moves upwards to keep a certain distance from the first lower suction cup 22 by the driving of the first servo motor 23 disposed on the base 10, so as to open and close the opening of the outer bag 81.

In another alternative embodiment, in order to bond the outer bag 81 and the inner bag 82 by matching with the bonding device 50, the knife pad 25 is further disposed on the suction holes of the first upper suction cup 21 and the first lower suction cup 22. The pad 25 has elasticity and heat resistance, and when the first upper suction cup 21 and the first lower suction cup 22 press the connection device 50, the pad 25 can perform heat insulation and buffering functions.

The second suction cup 30 is used to suck the inner bag 82 and lift or lower the sucked inner bag 82. The second suction cup 30 may be disposed on the base 10 at a point rearward with respect to the first suction cup 20. Similarly, the second suction cup 30 includes a second upper suction cup 31 and a second lower suction cup 32. The second upper suction cup 31 and the second lower suction cup 32 are disposed opposite to each other, and a plurality of suction holes may be respectively disposed on two opposite side surfaces.

In an alternative embodiment, the suction surfaces of the second upper suction cup 31 and the second lower suction cup 32 are provided with a plurality of grooves along the transverse direction and the longitudinal direction. The grooves are arranged at equal intervals so that the adsorption surface can be divided into a plurality of rectangular areas. The suction holes are arranged in the rectangular area. The design of the suction surface can ensure that the second suction cup 30 has a better suction effect.

When the inner bag 82 and the outer bag 81 are bonded to each other, the second upper suction cup 31 and the second lower suction cup 32 can move up and down with respect to the upper seat 11. The second upper suction cup 31 is selectively attached to the second lower suction cup 32. In this embodiment, the second suction cup 30 is used to suck the inner bag 82 of the double bag 80. The second upper suction cup 31 is movable up and down with respect to the upper seat 11. In this embodiment, the second suction cup 30 is used for sucking the outer side surface of the inner bag 82 of the double-layer bag 80. Specifically, the second upper suction cup 31 sucks the upper side surface of the inner bag 82 through the suction hole, and the second lower suction cup 32 sucks the lower side surface of the inner bag 82 through the suction hole. The second upper suction cup 31 can move downwards until it abuts against the second lower suction cup 32 or moves upwards to keep a certain distance from the second lower suction cup 32 by the servo motor arranged on the base 10, so as to open and close the opening of the inner bag 82.

The first upper suction cup 21 and the first lower suction cup 22 are slidably connected to a first slide rail 24 provided on the upper seat 11. Specifically, the first slide rail 24 may be disposed at a position of the upper seat 11 of the base 10 in the vertical direction, so that the first upper suction cup 21 and the first lower suction cup 22 can slide relative to the upper seat 11 in the vertical direction.

In order to ensure that the first suction cup 20 and the second suction cup 30 can move synchronously, so that the inner bag 82 and the outer bag 81 can be sucked synchronously, the first suction cup 20 and the second suction cup 30 can be fixedly connected together. For example, when the double bag 80 is bonded, the outer bag 81 and the inner bag 82 can be simultaneously sucked up by the first suction cup 20 and the second suction cup 30, respectively, and the openings of the outer bag 81 and the inner bag 82 can be simultaneously opened, thereby ensuring that the third suction cup 40 and the bonding device 50 can be easily inserted into the inner bag 82. The first upper suction cup 21 and the first lower suction cup 22 may be respectively provided with a second suction cup 30 connection adjustment seat, and the second upper suction cup 31 and the second lower suction cup 32 are respectively and fixedly connected with a second suction cup adjustment seat 37, so that the first suction cup 20 and the second suction cup 30 can be fixedly connected together.

Preferably, the second suction cup 30 can be adjusted in position on the second suction cup adjustment seat 37, so as to adjust the relative position between the first suction cup 20 and the second suction cup 30. For example, the relative position between the first suction cup 20 and the second suction cup 30 can be adjusted according to the distance that the end of the inner bag 82 exceeds the end of the outer bag 81, thereby ensuring that the first suction cup 20 and the second suction cup 30 can accurately suck and lift the outer bag 81 and the inner bag 82. Of course, it is understood that in other embodiments, the connection between the first suction cup 20 and the second suction cup 30 may include other forms, and the application is not limited thereto.

In the present embodiment, the first suction pad 20 and the second suction pad 30 can be moved by driving the first servo motor 23. Compare the drive mode that adopts the cylinder in prior art. The servo motor can accurately calculate the stroke and feedback information, and can perform actions such as hovering and stepping, and further can accurately position the position to be bonded. However, the control precision of the air cylinder is not high, and the inner bags 82 on the two sides can not be adsorbed accurately and synchronously and enter the outer bags 81 at the same time, so that the yield is low due to the error rate. Therefore, the servo motor driving mode can further improve the yield of products.

In order to drive the first suction cup 20 and the second suction cup 30, the inner bag and outer bag bonding mechanism of the double-layer bag further comprises a synchronizing wheel 33, a cam transmission shaft 34 and a cam 35. The number of the synchronizing wheels 33 is two, and the two synchronizing wheels 33 are provided corresponding to the first upper suction cup 21 and the first lower suction cup 22, respectively. The synchronizing wheel 33 is connected with the cam transmission shaft 34, the cam 35 is sleeved on the cam transmission shaft 34, and the first upper suction cup 21 and the first lower suction cup 22 are respectively connected with the cam 35. The first servomotor 23 is drivingly connected to the two synchronizing wheels 33, so that the two synchronizing wheels 33 can rotate synchronously.

In order to realize that the first suction cup 20 and the second suction cup 30 have a certain suction force, a plurality of suction holes are formed in the first suction cup 20 and the second suction cup 30 according to a preset arrangement mode, and the suction holes are respectively communicated with the vacuum negative pressure connectors 90 on the first suction cup 20 and the second suction cup 30. The vacuum sub-atmospheric connector 90 can communicate with an external vacuum sub-atmospheric device. When the vacuum negative pressure device is turned on, the first suction cup 20 and the second suction cup 30 have a certain suction force, and thus the outer bag 81 and the inner bag 82 can be sucked. It can be understood that, since the first suction cup 20 includes the first upper suction cup 21 and the first lower suction cup 22 which are disposed in an up-down symmetrical manner, the structures of the two suction cups are the same. The same applies to the second suction cup 30, which is not described in detail here.

In this embodiment, in order to bond the outer bag 81 and the inner bag 82 together, the inner and outer bag bonding mechanism of the double-layered bag may further include a third suction cup 40. The third suction cup 40 may be a rectangular member extending in the width direction of the base 10. The length of the third suction cup 40 can be matched with the width of the inner bag 82, so that the third suction cup 40 can better adsorb the inner bag 82. The basic structure of the third suction cup 40 is substantially the same as that of the first suction cup 20 and the second suction cup 30, that is, the upper and lower sides of the third suction cup 40 include a plurality of suction holes, and the plurality of suction holes are connected to a vacuum negative pressure device. When the vacuum negative pressure device is turned on, the third suction cup 40 has a certain suction force, and thus the inner bag 82 can be sucked. The third suction cup 40 is different from the first suction cup 20 and the second suction cup 30 in that there is only one third suction cup 40.

The third suction cup 40 may be slidably provided on a second slide rail 41 provided in the front-rear direction of the base 10 so that the third suction cup 40 may slide in the front-rear direction. The third suction cup 40 moves in a direction perpendicular to the movement direction of the first suction cup 20 and the second suction cup 30. The inner bag and outer bag bonding mechanism of the double-layer bag further comprises a third sucker base 43, the third sucker base 43 is arranged on a third slide rail in a sliding mode, and the third sucker 40 is arranged on the third sucker base 43.

For example, in the process of operating the inner bag and outer bag bonding mechanism of the double-layer bag, after the first upper suction cup 21 and the second upper suction cup 31 respectively suck the upper sides of the outer bag 81 and the inner bag 82, and the first lower suction cup 22 and the second lower suction cup 32 respectively suck the lower sides of the outer bag 81 and the inner bag 82, the first upper suction cup 21 and the second upper suction cup 31 move upward, and the first lower suction cup 22 and the second lower suction cup 32 move downward or remain stationary under the driving of the first servo motor 23 and the synchronizing wheel 33, so as to open the openings of the outer bag 81 and the inner bag 82. Meanwhile, the third suction cup 40 slides along the second slide rail 41 and extends into the inner bag 82 under the driving of the second servo motor 42. When the third suction cup 40 horizontally advances one section, the vacuum negative pressure device is turned on, the third suction cup 40 adsorbs the inner bag 82, and the second upper suction cup 31 and the second lower suction cup 32 are turned off in vacuum. The third suction cup 40 advances horizontally for two sections, and the third suction cup 40 advances to make the inner pocket 82 level with the mouth of the outer pocket 81 and tighten.

Further, in order to ensure that the second suction cup 30 and the third suction cup 40 can be well matched, the second suction cup 30 and the third suction cup 40 can be connected to a vacuum negative pressure device, and the on-off of the vacuum negative pressure device and the second suction cup 30 and the third suction cup 40 is controlled through a vacuum switcher, so as to control the timing of the second suction cup 30 and the third suction cup 40 for absorbing the inner bag 82.

After third suction cup 40 is advanced to tighten inner bag 82 flush with the mouth of outer bag 81, engagement means 50 is used to bond inner bag 82 and the outer band together. In this embodiment, the joining device may be a heat sealing knife 50 (hereinafter referred to as a sealing knife 50). The sealing blade 50 acts on the sealing portion of the packaging container by using a heating element to break the outer bag 81 and the inner bag 82 by heating, and they are cooled and fused together to seal the packaging container. It should be understood by those skilled in the art that the bonding device 50 is not limited thereto, and any device capable of achieving heating effect to melt and bond the inner bag 82 and the outer bag 81 may be used, such as a heat melting machine, an ultrasonic sealing machine, etc.

A key innovation of the present application is the change of the prior art engagement means 50 located outside the outer bag 81 to be located inside the inner bag 82, i.e. from the previous way of external gluing to internal gluing. The sealing knife 50 may be integrally provided with the third suction cup 40, that is, the sealing knife 50 may bond the outer bag 81 and the inner bag 82 together while the third suction cup 40 sucks the inner bag 82 from the inner side of the inner bag 82. In the present embodiment, "integrated" means that the sealing blade 50 and the third suction cup 40 can be disposed on the same component, for example, referring to fig. 5, the sealing blade 50 can be located at the rear side of the third suction cup 40, and the sealing blade 50 and the third suction cup 40 can be one component when viewed from the outside. In particular, the component may be: the sealing knife 50 and the third suction cup 40 may be formed by first manufacturing the sealing knife 50 and the third suction cup 40, and then assembling the sealing knife 50 and the third suction cup together; alternatively, the sealing blade 50 and the third suction cup 40 may be separately designed in one structure so as to be integrally manufactured in a manufacturing stage, thereby achieving a manufacturing process and improving the manufacturing efficiency. In summary, any embodiment for realizing the idea of the present invention is made based on the idea of changing the prior art engagement device 50 located outside the outer bag 81 to be located inside the inner bag 82, and falls within the protection scope of the present patent.

The structure of the seal 50 may specifically include a seal base 51 in the middle. The seal base 51 may be made of aluminum, so that the weight of the seal 50 can be reduced while ensuring the strength. Preferably, the surface of the knife sealing base 51 can be coated with special material Teflon, so that the surface of the tooth part is smooth, the inner bag 82 is heated and melted, the condition of sticking the knife is reduced, the service life is longer, and the knife sealing base is easy to maintain for a long time.

Referring to fig. 6, the upper and lower sides of the seal base 51 are provided with seal base plates 52, respectively. The knife sealing base plate 52 and the knife sealing base 51 can be connected through a spring 53, so that the knife sealing base plate 52 can move relative to the knife sealing base 51 under the action of external force. The upper and lower sides of the seal base 51 are also provided with a plurality of seal teeth 54 along the height direction of the base 10. The cutter sealing tooth 54 may be a metal member having a substantially cylindrical structure, and the heating element located inside the cutter sealing base 51 may transfer heat energy to the cutter sealing tooth 54 through heat conduction. Sealer teeth 54 in turn bond inner bag 82 to outer bag 81. Further, in order to ensure the safety of the seal cutter 50, the seal cutter base plate 52 is provided with holes corresponding to the number of the seal cutter teeth 54. When the third suction cup 40 advances horizontally for two stages to make the inner bag 82 and the outer bag 81 flush and tightened, the first upper suction cup 21 and the first lower suction cup 22 approach inward and press the seal cutter base plate 52 downward, and the seal cutter base plates 52 on the upper and lower sides of the third suction cup 40 are compressed by the springs 53 under the compression of the first upper suction cup 21 and the first lower suction cup 22 and move toward the seal cutter base 51, the end portions of the seal cutter teeth 54 can penetrate through the holes of the seal cutter base plate 52 to be exposed out of the seal cutter base plate 52, and the inner bag 82 and the outer bag 81 are bonded. After the bonding is completed, the first upper suction cup 21 and the first lower suction cup 22 are reset, and the knife sealing substrate 52 can be reset under the driving of the spring 53, so that the knife sealing teeth 54 can be located under the knife sealing substrate 52, and the safety of the whole bonding process is ensured.

In another preferred embodiment, to improve the strength of the seal 50, one side of the outer surface of the seal base plate 52 may be provided with a protective plate, which may include a copper plate 55 or other hard plate. The copper plate 55 may be further attached with teflon cloth to further increase the smoothness and degree of the outer surface of the blade sealing substrate 52.

Preferably, in order to reduce the temperature of the copper plate 55 of the sealing knife 50 and ensure that the outer temperature does not affect the inner bag 82 and the deformation affects the product, the inner side surface of the copper plate 55 may be further provided with a cooling device 56. The cooling device 56 may comprise a hollow copper tube with water cooling in between. For example, the cooling device 56 can control the temperature of the circulating water within 40 degrees, so that the heating temperature of the sealing knife 50 is below 250 degrees, and the surface temperature of the sealing knife 50 is controlled at 50 degrees, and the inner film is not influenced.

In this embodiment, in order to make the bonding position of the inner bag 82 and the outer bag 81 more flat when the inner bag 82 and the outer bag 81 are bonded, the inner bag and outer bag bonding mechanism of the double bag may further include a spreading device 60. The deployment device 60 may comprise: a spreader base 61, two spreader arms 62 and a drive 65, wherein the drive 65 is a servo motor or an air cylinder. The stent base 61 is slidably disposed on the second rail. The deployment arms 62 are located on either side of the third suction cup 40. The driving means 65 is provided on the deployment device base 61, and the driving means 65 is used for driving the deployment arm 62. After the third suction cup 40 extends into the inner bag 82, the unfolding arms 62 at both sides of the third suction cup 40 can be unfolded towards the left and right sides of the third suction cup 40 under the driving of the driving device 65, so that the open ends of the inner bag 82 and the outer bag 81 can be unfolded, and the joint of the inner bag 82 and the outer bag 81 bonded by the sealing knife 50 is more flat.

Specifically, since the unfolding device 60 can also be slidably disposed on the second slide rail 41, the unfolding device base 61 and the third suction cup base 43 can be the same, so as to ensure that the unfolding device 60 can move synchronously with the third suction cup 40 and the sealing knife 50, and improve the compactness of the structure. The air cylinder can be arranged on the guide rail in a sliding mode, and the air cylinder is fixedly connected with the unfolding devices 60 which are located on two sides of the unfolding devices 60 respectively through the swing arms 63 and the unfolding adjusting screw rods 64, so that left and right opening and closing synchronization is achieved. In the present embodiment, the leveling means that the inner bag 82 is spread outward by the spreading arms 62, and the film constituting the inner bag 82 is spread relatively flat.

In another preferred embodiment, the unfolding arm 62 can be further provided with a suction hole for sucking the inner surface of the inner bag.

The unfolding means 60 is provided as a separate component for a specific function, and can be applied to other similar double-layered bag making mechanisms, for example, a double-layered bag making mechanism in which the coupling means 50 is located outside the outer bag 81, in addition to the unfolding means 60 applied to the present embodiment. The present application is not intended to be limited to the specific suitable mechanisms of the deployment device 60.

In another preferred embodiment, the inner bag to outer bag bonding mechanism of the two-ply bag may further comprise an inner bag 82 blow-flat apparatus 70. The inner bag 82 leveling device 70 may be located on the upper seat 11 and located further away from the second suction cup 30 than the first suction cup 20. The inner bag 82 flattening device 70 is used for flattening the outer bag 81 and the inner bag 82 by blowing air through the inner bag 82 flattening device 70 when the bonded outer bag 81 and inner bag 82 are positioned on the mechanism.

In order to make the present invention more clearly understood by those skilled in the art, the operation of the inner bag and outer bag bonding mechanism of a double bag of the present invention will be described with reference to fig. 7, which is combined with the following steps.

The method comprises the following steps: feed (S101)

The double-layered bag 80 is transported to the base 10 by the transporting device, wherein the opening of the inner bag 82 of the double-layered bag 80 is located at the same side as the opening of the outer bag 81, and one end of the opening of the inner bag 82 protrudes out of the opening of the outer bag 81 to form a protruding portion 83, when the double-layered bag 80 is located at the operation position, the position of the outer bag 81 adjacent to the opening is located between the first upper suction cup 21 and the first lower suction cup 22 of the first suction cup 20. The protruding portion 83 of the inner bag 82 is located between the second upper suction cup 31 and the second lower suction cup 32 of the second suction cup 30. In the present embodiment, the protruding distance of the protruding portion 83 is at least 2cm, and in practical operation, the protruding distance of the protruding portion 83 may be selected according to a use situation to adapt to different working conditions.

Preferably, referring to the above, the inner bag and outer bag bonding mechanism of the double-layer bag may further comprise an inner bag 82 leveling device 70. After the double-layer belt is conveyed to the base 10, the inner bag 82 flattening device 70 starts to work, and the inner bag 82 flattening device 70 blows air towards the inner bag 82 so as to flatten and unfold the inner bag 82.

Step two: opening support (S102)

After the first step, the first lower suction cup 22 of the first suction cup 20 is sucked to the lower side of the outer bag 81, and the first upper suction cup 21 is moved upward while sucking the upper side of the outer bag 81 and/or the first lower suction cup 22 is moved downward. The second lower suction cup 32 sucks the lower surface of the protruding portion 83 of the inner bag 82, and the second upper suction cup 31 of the second suction cup 30 sucks the upper surface of the protruding portion 83 of the inner bag 82 and moves upward and/or the second lower suction cup 32 moves downward. In the embodiment, the upward movement distance of the first upper suction cup 21 and the second upper suction cup 31 is 3 to 5cm, but not limited thereto, the movement distance can be changed according to the user's requirement.

Step three: orientation (S103)

After the second step, the openings of the outer bag 81 and the inner bag 82 are opened, the third suction cup 40 is moved into the inner bag 82 and sucks the inner bag 82, at this time, the second suction cup 30 cancels the suction, and the third suction cup 40 moves toward the inside of the outer bag 81 until the opening of the inner bag 82 is aligned with the opening of the outer bag 81. Due to the two-slope design of the third suction cup 40, the effect of easier access to the inner bag 82 can be achieved with a smaller access area during the movement into the inner bag 82.

Preferably, in this step, after the third suction cup 40 is inserted into the inner bag 82, the unfolding arms 62 of the unfolding devices 60 located at both sides of the third suction cup 40 can be unfolded towards the left and right sides of the third suction cup 40 under the driving of the power device, so as to flatten the open ends of the inner bag 82 and the outer bag 81, and the inner bag 82 and the outer bag 81 bonded by the sealing knife 50 are more flat.

Step four: joint (S104)

After the third step, since the sealing blade 50 is integrally disposed with the third suction cup 40 and the sealing blade 50 is located behind the third suction cup 40, after the third suction cup 40 moves toward the inside of the outer bag 81 until the opening of the inner bag 82 is aligned with the opening of the outer bag 81, the first upper suction cup 21 moves downward and presses the sealing blade 50 downward. As will be understood from the above description of the structure of the sealing knife 50, when the sealing knife 50 is pressed down by the first upper suction cup 21, the sealing knife teeth 54 are ejected from the sealing knife 50, and the outer bag 81 and the inner bag 82 are bonded to each other, and then the next process is performed.

Step five: discharging (S105)

After the fourth step of joining, the double-layer bag 80 is formed in a state that the inner bag 82 and the outer bag 81 are joined and the openings are cut and aligned, and the joint forms an annular connecting portion, and the first suction cup 20 and the third suction cup 40 are removed from the suction and returned to the original position, and the double-layer bag 80 is transferred to the material receiving position by the conveying device.

The present invention has been illustrated by the above embodiments, but it should be understood that the above embodiments are for illustrative and descriptive purposes only and are not intended to limit the invention to the scope of the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many variations and modifications may be made in accordance with the teachings of the present invention, which variations and modifications are within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. An inner bag and outer bag bonding mechanism of a double-layer bag is characterized by comprising:

a base;

2. The inner bag and outer bag bonding mechanism of the double bag of claim 1, wherein the first suction cup comprises: a first upper sucker which is arranged on the base in a manner of moving up and down; and the first lower sucker is arranged on the base in a vertically movable mode, and the first upper sucker can be selectively attached to the first lower sucker.

3. The inner bag and outer bag bonding mechanism of the double-layered bag according to claim 2, wherein the second suction cup comprises: a second upper suction cup which is arranged on the base in a manner of moving up and down; the second lower sucker can be arranged on the base in a vertically moving mode, and the second upper sucker can be selectively attached to the second lower sucker.

4. The inner and outer bag bonding mechanism of the two-layered bag of claim 3, wherein the third suction cup is movable between the first upper suction cup and the first lower suction cup or between the second upper suction cup and the second lower suction cup.

5. The inner bag and outer bag bonding mechanism of the double-layer bag according to claim 3, wherein the second upper suction cup is fixedly connected with the first upper suction cup, and/or

The second lower sucker is fixedly connected with the first lower sucker.

6. The mechanism for bonding the inner bag and the outer bag of the double-layer bag according to claim 5, wherein the first upper suction cup is provided with a second suction cup adjusting seat; the second upper sucker is connected with the second sucker adjusting seat, and the relative position between the second upper sucker and the first upper sucker is adjusted by adjusting the position of the second upper sucker on the second sucker adjusting seat; and/or

7. The inner bag and outer bag bonding mechanism of the double-layer bag according to claim 2, wherein the first upper suction cup and the first lower suction cup are slidably disposed on a first guide rail disposed on the base in an up-down direction.

8. The inner bag and outer bag bonding mechanism of the double-layer bag according to claim 1 or 4, wherein the second suction cup and the third suction cup are externally connected with the same negative pressure device.

9. The inner bag and outer bag bonding mechanism of a double-layer bag according to claim 2, further comprising a first driving device disposed on the base, wherein the first driving device is used for driving the first suction cup and the second suction cup.

10. The inner bag and outer bag bonding mechanism of the double-layered bag according to claim 9, wherein the first driving means comprises at least one of a servo motor and an air cylinder.

11. The inner bag and outer bag bonding mechanism of the double-layer bag according to claim 9, wherein the inner bag and outer bag bonding mechanism of the double-layer bag further comprises a synchronizing wheel, a cam transmission shaft and a cam;

12. The inner bag and outer bag bonding mechanism of a two-layer bag according to claim 1, wherein said bonding means comprises at least one of a heat sealing knife, a hot melt machine, and an ultrasonic sealer.

13. The mechanism for bonding the inner bag and the outer bag of the double-layer bag according to claim 1, wherein the bonding means is a heat-sealing knife, and the heat-sealing knife comprises:

a knife sealing base;

14. The mechanism for bonding the inner bag and the outer bag of the double-layer bag according to claim 13, wherein the knife sealing substrate and the knife sealing base are connected by an elastic member, so that the knife sealing substrate can move relative to the knife sealing base under the action of external force and can be reset without the action of external force.

15. The inner and outer bag bonding mechanism of a two-ply bag of claim 13, wherein said heat seal knife further comprises a protective plate on one side of the outer surface of said knife substrate.

16. The inner bag and outer bag bonding mechanism of a two-layer bag of claim 15, wherein said heat sealing knife further comprises a cooling device for reducing the temperature of said protective plate and said knife base plate.

17. The inner and outer bag bonding mechanism of the double-layered bag of claim 1, further comprising a spreader for spreading the inner bag when the third suction cup is at least partially located within the inner bag.

18. The inner and outer bag bonding mechanism of the double bag of claim 17, wherein the deployment device comprises:

a deployment device base slidably disposed on the base;

two unfolding arms located on two sides of the third suction cup;

19. The inner bag and outer bag bonding mechanism of the double-layer bag according to claim 18, wherein the third driving device is a servo motor or an air cylinder.

20. The inner bag and outer bag bonding mechanism of the double-layer bag according to claim 1, wherein the inner bag and outer bag bonding mechanism of the double-layer bag comprises a second slide rail, and the second slide rail is arranged on the base along the front-back direction; the third sucker is arranged on the second sliding rail in a sliding mode.

21. The inner bag and outer bag bonding mechanism of the double-layered bag of claim 20, wherein the inner bag and outer bag bonding mechanism of the double-layered bag comprises a second driving device for driving the third suction cup.

22. The mechanism for bonding the inner bag and the outer bag of the double-layer bag according to claim 21, wherein the second driving device is a servo motor or an air cylinder.

23. The mechanism for bonding the inner bag and the outer bag of the double-layer bag according to claim 1, further comprising an inner bag flattening device located on the upper seat of the base, wherein the inner bag flattening device is used for flattening the outer bag and the inner bag by blowing air.

24. The mechanism for bonding an inner bag and an outer bag of a double-layer bag according to claim 3, wherein the suction surface of the second upper suction cup and the second lower suction cup is provided with a plurality of grooves along the transverse direction and the longitudinal direction, the suction surface is divided into a plurality of areas by the plurality of grooves, and the suction holes are arranged in the areas.

25. A method for bonding an inner bag and an outer bag of a double-layered bag, which is applied to the inner bag and outer bag bonding mechanism of the double-layered bag according to any one of claims 1 to 24, comprising the steps of:

opening: the first lower sucker of the first sucker sucks the lower side surface of the outer bag, and the first upper sucker sucks the upper side surface of the outer bag and moves upwards; the second lower sucker sucks the lower side surface of the protruding part of the inner bag, and the second upper sucker sucks the upper side surface of the protruding part of the inner bag and moves upwards;

26. The method for bonding the inner bag and the outer bag of the double-layered bag according to claim 25, further comprising the steps of:

27. The method for bonding an inner bag and an outer bag of a double-layered bag according to claim 25, wherein the bonding means is integrally provided with a third suction cup and moves in synchronization with the third suction cup.

28. The method for bonding an inner bag and an outer bag of a double-layered bag according to claim 25,

the jointing device is a heat seal knife, and the heat seal knife comprises:

a knife sealing base;

29. The method for bonding the inner bag and the outer bag of the double-layer bag according to claim 28, wherein the knife sealing substrate and the knife sealing base are connected by an elastic member, so that the knife sealing substrate can move relative to the knife sealing base under the action of external force and can be reset without the action of external force.

30. The method of bonding an inner bag to an outer bag of a double bag according to claim 28, wherein the heat sealing knife further comprises a protection plate on one side of an outer surface of the base plate of the sealing knife.

31. The method of claim 30, wherein the heat sealing knife further comprises a cooling device for reducing the temperature of the protection plate and the base plate of the sealing knife.

32. The method for bonding the inner bag and the outer bag of the double-layered bag according to claim 25, wherein the positioning step comprises: the third sucker moves into the inner bag, the unfolding device supports the inner bag to be flat, the third sucker sucks the inner surface of the inner bag, the second sucker cancels adsorption at the moment, and the third sucker moves towards the inner part of the outer bag until the opening of the inner bag is aligned with the opening of the outer bag.

33. The method for bonding the inner bag and the outer bag of the double-layered bag according to claim 32, wherein the unfolding means comprises:

a deployment device base slidably disposed on the base;

two unfolding arms located on two sides of the third suction cup;