Forming device for packaging bag

Abstract

The utility model discloses a forming device for a packaging bag, which comprises a rack, a die body, a die driving part and an inserting structure, and the die body is in transmission connection with the die driving part. The mold body comprises a pair of first supporting parts arranged in the width direction of the mold body at intervals and a pair of second supporting parts arranged in the length direction of the mold body at intervals, and the inserting structure comprises clamping assemblies corresponding to at least one first supporting part of the mold body. The clamping assembly comprises an inner clamping piece arranged in the mold body and an outer clamping piece arranged on the rack and located on the outer side of the corresponding first supporting part in the width direction, and in the forming process, the clamping driving assembly drives the inner clamping piece and / or the outer clamping piece to clamp the corresponding part of the base material; and the traction driving assembly drives the inner clamping piece and / or the outer clamping piece to move in the height direction, so that the overlapped parts of the bag opening folded edges of the bag body in the area of the second supporting part are mutually overlapped.

Description

TECHNICAL FIELD

[0001] The utility model relates to packing bag production and processing technical field, especially a kind of forming device for packing bag. BACKGROUND

[0002] Packaging bag has become an essential tool in modern society, since the practicability and portability of packaging bag are very high, people gradually appear various different requirements for the manufacturing requirements of packaging bag. Among them, when taking and placing articles, the bag opening of packaging bag needs to be frequently passed, which leads to the bag body being easily worn out, and the handle of packaging bag is usually fixed on the edge of bag opening by bonding, or fixing piece and the like, in order to prolong the service life of bag opening and improve the connection strength of bag body and handle, it is extremely necessary to strengthen the strength of bag opening.

[0003] In the prior art, in the production process of packaging bag, the base material is first pressed to form a bag body by using a forming die, and then the bag opening part of the bag body is folded inward by a separate bag opening machine, so that the bag opening forms a bag opening flange around the bag opening for one turn, which improves the strength of the bag opening and reduces the risk of tearing the bag opening when loading and taking articles.

[0004] However, after the bag body is formed, the bag opening of the bag body is folded and pressed by the bag opening machine, which increases the production process of packaging bag, so that the packaging bag needs to be specially transported to the bag opening machine for folding after being formed, which greatly delays the production rate of packaging bag. SUMMARY

[0005] The utility model aims at solving the technical problem that in the production process of packaging bag in the prior art, the bag opening of the bag body is folded and pressed by a bag opening machine after the bag body is formed, which greatly delays the production rate of packaging bag.

[0006] To solve the above technical problems, the embodiment of the utility model discloses a forming device for packaging bag, which comprises a rack, a mold body and a mold driving element arranged on the rack, and the top of the mold body is drivingly connected with the mold driving element arranged on the rack.

[0007] The mold body comprises a pair of first support portions arranged at intervals along the width direction of the mold body, and a pair of second support portions arranged at intervals along the length direction of the mold body, and the two side edges of each first support portion in the length direction are respectively connected with the edges of the corresponding second support portion in the width direction to form a ridge.

[0008] And the forming device further comprises a splicing structure, the splicing structure comprises a clamping assembly corresponding to each of the at least one first support portion, each clamping assembly comprises an inner clamping member arranged inside the mold body and an outer clamping member arranged on the rack and located outside the corresponding first support portion in the width direction; the clamping driving assembly is in transmission connection with at least one of the inner clamping member and the outer clamping member and drives the at least one of the inner clamping member and the outer clamping member to move in the width direction; the traction driving assembly is in transmission connection with at least one of the inner clamping member and the outer clamping member and drives the at least one of the inner clamping member and the outer clamping member to move in the height direction of the mold body.

[0009] The base material located below the mold body has a pre-folded bag opening hem at both ends in the width direction, the mold driving member drives the mold body to press the base material, the base material is folded to surround a pair of first support portions, and in the width direction, the base material is folded towards the corresponding second support portion on both sides of the pair of first support portions and partially overlaps to form a bag body of the packaging bag.

[0010] The clamping driving assembly drives the corresponding outer clamping member and / or inner clamping member of the corresponding first support portion to move towards each other in the width direction, so that the outer clamping member and the inner clamping member clamp the corresponding part of the base material; the traction driving assembly drives the outer clamping member and / or the inner clamping member to move in the height direction, and drives the corresponding part of the base material to move relative to the first support portion in the height direction, so that the overlapping parts of the bag opening hem of the bag body in the second support portion region are spliced with each other.

[0011] With the above technical scheme, the forming mold is provided with a splicing structure, that is, the at least one first support portion of the mold body is provided with a corresponding clamping assembly, so that the mold driving member drives the mold body to press the base material, the base material is folded to surround a pair of first support portions, and in the width direction, the base material is folded towards the corresponding second support portion on both sides of the pair of first support portions and partially overlaps to form a bag body of the packaging bag, then the clamping driving assembly drives the inner clamping member and / or the outer clamping member to clamp the corresponding part of the base material, and the traction driving assembly drives the inner clamping member and / or the outer clamping member to move in the height direction, so that the overlapping parts of the bag opening hem of the bag body in the second support portion region are spliced with each other, the processing of the bag opening hem is directly completed in the forming process, and the packaging bag does not need to be additionally transported to a special bag opening machine after being formed, which greatly improves the production efficiency of the packaging bag.

[0012] In addition, the clamping assembly ensures that the base material does not easily deviate in other directions when moving in the height direction during splicing through the cooperation of the inner clamping member and the outer clamping member, which improves the success rate and stability of the bag opening hem splicing, and further improves the production efficiency and yield of the packaging bag equipment.

[0013] The embodiment of the utility model discloses a forming device for packaging bag, in the width direction, the outer surface of inner clamping piece is inwardly concave relative to the outer surface of at least one first support part, the outer surface of outer clamping piece is spaced apart from at least one first support part, and clamping drive assembly includes the outer clamping drive piece of setting on the frame and with the transmission connection of outer clamping piece, the inner clamping drive piece of setting in the mould body and with the transmission connection of inner clamping piece, inner clamping drive piece drives inner clamping piece, and outer clamping drive piece drives outer clamping piece to move along the width direction each other or opposite.

[0014] Or, in the width direction, the outer surface of outer clamping piece is spaced apart from the outer surface of at least one first support part, and clamping drive assembly includes the outer clamping drive piece of setting on the frame and with the transmission connection of outer clamping piece, and outer clamping drive piece drives outer clamping piece to move along the width direction.

[0015] Or, in the width direction, the outer surface of inner clamping piece is inwardly concave relative to the outer surface of at least one first support part, and clamping drive assembly includes the inner clamping drive piece of setting in the mould body and with the transmission connection of inner clamping piece, and inner clamping drive piece drives inner clamping piece to move along the width direction.

[0016] When clamping drive piece includes inner clamping drive piece and outer clamping drive piece, the inner and outer clamping pieces can simultaneously apply pressure to the substrate from both sides of the substrate in the width direction, more stably and reliably clamping the substrate, avoiding the substrate slipping due to insufficient pressure or damage due to excessive pressure. In addition, the inner recess of the inner clamping piece is inwardly concave relative to the outer surface of the first support part, and the spacing of the outer clamping piece leaves a substrate bending space, so that even if the substrate on the first support part is slightly offset in the width direction, the position of the substrate can be adjusted through bidirectional clamping.

[0017] When the clamping drive piece only includes the outer clamping drive piece, the inner clamping drive piece and the matching transmission structure are reduced, and the clamping of the substrate is only realized by moving the inner clamping piece in the width direction, reducing the components in the mould body and reducing the weight of the mould body. Similarly, when the clamping drive piece only includes the inner clamping drive piece, the components provided on the frame are also reduced, reducing the manufacturing cost and mechanical failure probability of the forming device.

[0018] The embodiment of the utility model discloses a forming device for packaging bag, and the traction drive assembly includes the inner traction drive piece of setting in the mould body inside and with the transmission connection of inner clamping piece, and the outer traction drive piece of being located the mould body outside and with the transmission connection of outer clamping piece, and inner traction drive piece drives inner clamping piece to move along the height direction, and outer traction drive piece drives outer clamping piece to move along the height direction synchronously.

[0019] Alternatively, the traction driving assembly comprises an outer traction driving member arranged on the rack and in transmission connection with the outer clamping member, the outer traction driving member drives the outer clamping member to move along the height direction, and the inner clamping member follows along the height direction.

[0020] Alternatively, the traction driving assembly comprises an inner traction driving member arranged inside the mold body and in transmission connection with the inner clamping member, the inner traction driving member drives the inner clamping member to move along the height direction, and the outer clamping member follows along the height direction.

[0021] With the above technical scheme, when the traction driving assembly comprises the inner traction driving member and the outer traction driving member, the inner and outer clamping members are controlled by the corresponding driving members, so that the moving speed and distance of the two in the height direction are completely consistent, and the wrinkling of the base material caused by different moving speeds is avoided, and the plug-in qualification rate is greatly improved. At the same time, for special base materials with uneven thickness and high elasticity, synchronous driving can uniformly apply traction force to prevent local stretching deformation of the base material.

[0022] When the traction driving assembly only comprises the outer traction driving member, the inner traction driving member and the matching transmission structure are omitted, the complexity inside the mold body is reduced, and the manufacturing cost and the later maintenance cost are significantly reduced. Similarly, when the traction driving assembly only comprises the inner traction driving member, the components arranged on the rack can also be simplified.

[0023] The embodiment of the utility model discloses a kind of forming device for packaging bag, inner clamping member includes inner support, and the inner clamping belt of being arranged on inner support, inner clamping belt is set on the multiple inner support rollers of being arranged along height direction with interval, inner clamping driving member is arranged as inner clamping driving motor fixed in mold body interior, the output end of inner clamping driving motor extends along width direction and is in transmission connection with inner support, inner traction driving member is arranged as inner traction motor, and inner traction motor is fixed on inner support and is in transmission connection with one of multiple inner support rollers.

[0024] And, outer clamping member includes outer support, and the outer clamping belt of being arranged on outer support, outer clamping belt is set on the multiple outer support rollers of being arranged along height direction with interval, outer clamping driving member is arranged on the outer clamping driving motor of rack, the output end of outer clamping driving motor extends along width direction and is in transmission connection with inner support, outer traction driving member is arranged as outer traction driving motor, and outer traction driving motor is fixed on outer support and is in transmission connection with one of multiple outer support rollers.

[0025] According to the technical scheme, the inner clamping member and the outer clamping member are in contact with the corresponding surfaces of the base material through the outer surfaces of the belts, so that the inner clamping member and the outer clamping member have a large contact area with the base material, the pressure applied to the base material is more uniform, and when the base material has a slight deviation, the inner clamping belts and the outer clamping belts on both sides can be slightly deformed to adapt, so that the base material is prevented from being damaged by extrusion.

[0026] The embodiment of the utility model discloses a forming device for packaging bag, inner clamping member includes inner frame and a plurality of inner clamping rollers are arranged on the inner frame in the height direction, and inner clamping drive part is transmission connection with the inner frame, and inner traction drive part is connected with a plurality of inner clamping rollers through transmission belt.

[0027] And, outer clamping member includes outer frame and a plurality of outer clamping rollers are arranged on the outer frame in the height direction, and outer clamping drive part is transmission connection with the outer frame, and outer traction drive part is connected with a plurality of outer clamping rollers through transmission belt.

[0028] According to the technical scheme, the inner clamping member and the outer clamping member are in contact with the corresponding surfaces of the base material through the outer surfaces of the belts, so that the inner clamping member and the outer clamping member have a large contact area with the base material, the pressure applied to the base material is more uniform, and when the base material has a slight deviation, the inner clamping belts and the outer clamping belts on both sides can be slightly deformed to adapt, so that the base material is prevented from being damaged by extrusion.

[0029] The embodiment of the utility model discloses a forming device for packaging bag, and the plug-in structure further includes a guide assembly, the guide assembly includes an inner guide arranged in the inner part of the mold body and an outer guide arranged on the rack, the outer guide is located on the outer side of at least one first support part in the width direction, and the inner guide and the outer guide extend in the height direction.

[0030] The inner clamping member is slidably arranged on the inner guide in the height direction, and the outer clamping member is slidably arranged on the outer guide in the height direction.

[0031] According to the technical scheme, the inner guide and the outer guide are arranged in the height direction, and the sliding paths of the inner clamping member and the outer clamping member are respectively constrained, so that the left-right deviation or the front-back deviation caused by uneven force during the traction process is avoided, and the accurate plug-in of the overlapping part of the base material in the second support part area is improved, and the reinforcing effect on the bag opening is ensured.

[0032] In addition, when the clamping piece moves in the height direction, the gravity and the reaction force of the base material can be transmitted to the mold body or the rack through the guide piece, so that the forces are not directly applied to the traction driving assembly (such as a motor and a transmission rod), and the wear and failure probability of the driving assembly are reduced.

[0033] The embodiment of the utility model discloses a kind of forming device for packaging bag, inner clamping piece includes inner mounting seat and the inner clamping plate being set on inner mounting seat, inner mounting seat is on the surface of the side of width direction away from outer clamping piece, with the inner clamping drive piece transmission connection being set in the inside of mold body, inner guide piece and inner traction driving piece are set on the surface of the side of width direction of inner mounting seat towards outer clamping piece, inner clamping plate is slidably arranged on inner guide piece and with the output end transmission connection of inner traction driving piece.

[0034] And, outer clamping piece includes outer mounting seat and the outer clamping plate being set on outer mounting seat, outer mounting seat is on the surface of the side of width direction away from inner clamping piece, with the outer clamping drive piece transmission connection being set on rack, outer guide piece and outer traction driving piece are set on the surface of the side of width direction of outer mounting seat towards inner clamping piece, outer clamping plate is slidably arranged on outer guide piece and with the output end transmission connection of outer traction driving piece.

[0035] Using the above technical scheme, inner clamping piece and outer clamping piece are clamped by clamping plate, which can more reliably and stably clamp the corresponding part of the base material, reducing the slippage caused by insufficient local pressure. And compared with clamping belt and clamping roller group, the design of clamping plate is more flexible, occupies smaller space, and is more conducive to space arrangement inside the mold body and on the rack.

[0036] The embodiment of the utility model discloses a kind of forming device for packaging bag, and the surface of inner clamping plate and outer clamping plate towards each other is provided with flexible layer.

[0037] Alternatively, the surface of inner clamping plate and outer clamping plate towards each other is provided with a plurality of air suction ports, and each air suction port is communicated with external air extraction equipment through pipeline.

[0038] Using the above technical scheme, the flexible layer provided on the surface of inner clamping plate and outer clamping plate towards each other can buffer the rigid pressure of clamping plate, reduce the extrusion marks on the outer surface of base material; at the same time, the flexible material has high friction coefficient and smooth surface, which can avoid scratching caused by hard contact during clamping. In addition, the flexible layer has certain elasticity, can be deformed with the slight ups and downs of base material surface (such as the wrinkles of pre-folding edge, thickness deviation), fill the contact gap, increase the effective clamping area, so as to improve the wrapping force of base material, prevent base material from slipping during traction.

[0039] The suction port arranged on the surfaces of the inner clamping plate and the outer clamping plate facing each other can make the base material flatly adhere to the surface of the clamping plate, and avoid local wrinkles or deviation of the base material during traction.

[0040] The embodiment of the utility model discloses a forming device for packaging bag, and the plug-in structure includes the clamping assembly corresponding to one first support part.

[0041] The clamping drive assembly drives the corresponding part of the clamping assembly to clamp the base material, the traction drive assembly drives the outer clamping piece and / or the inner clamping piece to move downward along the height direction, so that the bag body flange on both sides of the base material in the width direction forms a height difference in each second support part area, the traction drive assembly drives the outer clamping piece and / or the inner clamping piece to move upward along the height direction, and the bag opening flange of the base material is inserted into each other at the overlapping position in the second support part area.

[0042] Alternatively, the plug-in structure includes a pair of clamping assemblies corresponding to a pair of first support parts respectively.

[0043] The clamping drive assembly corresponding to each first support part drives the corresponding part of the clamping assembly to clamp the base material, the traction drive assembly corresponding to one first support part drives the outer clamping piece and / or the inner clamping piece to move downward along the height direction, and the traction drive assembly corresponding to the other first support part drives the outer clamping piece and / or the inner clamping piece to move upward along the height direction, so that the bag body flange on both sides of the base material in the width direction forms a height difference in each second support part area, the traction drive assembly corresponding to one first support part drives the outer clamping piece and / or the inner clamping piece to move upward along the height direction, and the traction drive assembly corresponding to the other first support part drives the outer clamping piece and / or the inner clamping piece to move downward along the height direction, and the bag opening flange of the base material is inserted into each other at the overlapping position in the second support part area.

[0044] When one first support part is provided with a corresponding clamping assembly, only the part corresponding to one side of the clamping assembly needs to be displaced in the width direction of the base material during the plug-in process, and the other part does not need to be displaced, so that the probability of damage to the base material during the plug-in process is small, and the volume of the forming equipment in the width direction is smaller, which is suitable for the scene of limited workshop space and compact equipment layout.

[0045] When both first support parts are provided with corresponding clamping assemblies, both sides of the base material need to be displaced in the width direction during the plug-in process, and on the premise that the displacement of the parts on both sides is small, the plug-in success rate of the bag opening flange at the overlapping position in the second support part area is ensured.

[0046] The embodiment of the utility model discloses a kind of forming devices for packaging bag, forming device further include being arranged on rack, in length direction, a pair of side insertion components are located in the both sides of mould body, each side insertion component includes the side insertion plate that is arranged on mould body in width direction interval and is correspondingly located in the both sides of second support portion, each side insertion plate is transmission connection with the side insertion drive element of corresponding position setting on rack.

[0047] Wherein, each side insertion drive element drives corresponding side insertion plate to move along width direction towards mould body, so that substrate is bent towards corresponding second support portion on the both sides of a pair of first support portion respectively.

[0048] By the side insertion plate of side insertion component, substrate is bent towards corresponding second support portion on the both sides of a pair of first support portion respectively in the above technical scheme, and in subsequent insertion process, insertion plate can make substrate to be folded at a predetermined angle on the both sides of a pair of first support portion, so that bag mouth flange located close to the inside of mould body and corresponding substrate can be smoothly inserted between bag mouth flange and corresponding substrate away from mould body side.

[0049] The utility model discloses the beneficial effects are:

[0050] The utility model discloses a kind of forming devices for packaging bag, including rack, and mould body and mould drive element are set on rack, the top of mould body is transmission connection with mould drive element, mould body includes a pair of first support portion along the width direction interval of mould body, a pair of second support portion along the length direction interval of mould body, this kind of forming device further include insertion structure, insertion structure includes the clamping assembly corresponding with at least one first support portion of mould body respectively, clamping assembly includes the inner clamping piece of being set in mould body interior, and the outer clamping piece being set on rack and being located in corresponding one first support portion outside in width direction, in forming process, mould drive element drives mould body to press substrate, substrate is bent and surrounds a pair of first support portion, and in width direction, substrate is bent and overlaps partially on the both sides of a pair of first support portion towards corresponding second support portion respectively, forms the bag body of packaging bag, at this time, clamping drive assembly drives inner clamping piece and / or outer clamping piece clamping corresponding part of substrate, and by traction drive assembly drives inner clamping piece and / or outer clamping piece to move along height direction, so that the overlapping portion of bag mouth flange in second support portion region of bag body is overlapped with each other, directly complete the processing of bag mouth flange in forming process, without additional transfer to special bag mouth machine after packaging bag is formed, greatly improve the production efficiency of packaging bag, in addition, by the cooperation of inner clamping piece and outer clamping piece, ensure that substrate is not easy to deviate in other directions when moving along height direction in insertion process, improve the success rate and stability of bag mouth flange insertion. BRIEF DESCRIPTION OF DRAWINGS

[0051] Figure 1 A schematic diagram of a three-dimensional structure of a mold body of a forming device for a packaging bag is provided for Embodiment 1 of the present application;

[0052] Figure 2 A schematic diagram of a structure in which a mold body of a forming device for a packaging bag and a clamping assembly are provided as a clamping belt is provided for Embodiment 1 of the present application;

[0053] Figure 3 A schematic diagram of a structure in which a mold body of a forming device for a packaging bag and a clamping assembly are provided as a clamping roller is provided for Embodiment 1 of the present application;

[0054] Figure 4 A schematic diagram of a structure in which a mold body of a forming device for a packaging bag and a clamping assembly are provided as a clamping plate is provided for Embodiment 1 of the present application;

[0055] Figure 5 A schematic diagram of a state in which inner and outer clamping members of a clamping assembly of a forming device for a packaging bag clamp a base material is provided for Embodiment 1 of the present application;

[0056] Figure 6 A schematic diagram of a state in which inner and outer clamping members of a clamping assembly of a forming device for a packaging bag clamp a base material and move downward is provided for Embodiment 1 of the present application;

[0057] Figure 7 A Figure 6 A partial enlarged schematic diagram of a base material at position A and a bag opening folded edge is provided for Embodiment 1 of the present application;

[0058] Figure 8 A schematic diagram of a structure in which a mold body of a forming device for a packaging bag and a clamping assembly are provided as a clamping belt is provided for Embodiment 2 of the present application;

[0059] Figure 9 A schematic diagram of another structure in which a mold body of a forming device for a packaging bag and a clamping assembly are provided as a clamping belt is provided for Embodiment 2 of the present application;

[0060] Figure 10 A schematic diagram of a structure in which a mold body of a forming device for a packaging bag and a clamping assembly are provided as a clamping belt is provided for Embodiment 3 of the present application;

[0061] Figure 11 A schematic diagram of another structure in which a mold body of a forming device for a packaging bag and a clamping assembly are provided as a clamping belt is provided for Embodiment 3 of the present application.

[0062] Explanation of reference numerals:

[0063] 10, mold body; 110, first support part; 111, first side wall; 120, second support part; 121, second side wall; 130, connecting frame;

[0064] 20, clamping assembly;

[0065] 210, inner clamping part; 2110, inner support; 2111, inner clamping belt; 2112, inner frame; 2113, inner clamping roller; 2114, inner mounting seat; 2115, inner clamping plate;

[0066] 220, outer clamping part; 2210, outer support; 2211, outer clamping belt; 2212, outer frame; 2213, outer clamping roller; 2214, outer mounting seat; 2215, outer clamping plate;

[0067] 230, clamping drive assembly; 231, outer clamping drive part; 232, inner clamping drive part;

[0068] 240, traction drive assembly; 241, outer traction drive part; 242, inner traction drive part;

[0069] 250, guide assembly; 251, outer guide part; 252, inner guide part;

[0070] X, width direction; Y, length direction; Z, height direction. DETAILED DESCRIPTION

[0071] As mentioned in the background, in the prior art, after the bag body is formed, a bag mouth machine is used to fold and press the bag mouth of the bag body, which greatly delays the production rate of the packaging bag.

[0072] To this end, the utility model provides a kind of for the forming device of packaging bag, this forming device is compared to the traditional forming device of packaging bag and adds plug-in structure, plug-in structure includes the clamping assembly corresponding with the at least one first support portion of mould body respectively, clamping assembly includes the inner clamping piece being set in the inside of mould body, and the outer clamping piece being set on rack and being located the outside of corresponding one first support portion in width direction, in forming process, mould driving part drives mould body to press substrate, substrate is bent and surrounds a pair of first support portion, and, in width direction, substrate is bent and partially overlaps respectively on the two sides of a pair of first support portion towards corresponding second support portion, and the bag body of packaging bag is formed, at this time, clamping drive assembly drives the corresponding part of inner clamping piece and / or outer clamping piece clamping substrate, and by traction drive assembly drives inner clamping piece and / or outer clamping piece moves along height direction, so that the overlapping portion of bag mouth flange of bag body in the region of second support portion is overlapped with each other, directly complete the processing of bag mouth flange in forming process, without additional transfer to special bag mouth machine after packaging bag is formed, greatly improve the production efficiency of packaging bag, in addition, by the cooperation of inner clamping piece and outer clamping piece, ensure that substrate is not easy to deviate in other directions when moving along height direction in plug-in process, improve the success rate and stability of bag mouth flange plug-in.

[0073] To make the purpose, technical scheme and advantage of the utility model more clear, the implementation of the utility model will be described in further detail below in conjunction with the drawings.

[0074] The utility model provides a kind of for the forming device of packaging bag, including rack, and the mould body 10 (see Figure 1 ) and mould driving part being set on rack, and mould body 10 top is drivenly connected with the mould driving part being set on rack.

[0075] As Figure 1 Indicated, mould body 10 includes a pair of first support portion 110 being set apart along the width direction X of mould body 10, a pair of second support portion 120 being set apart along the length direction Y of mould body 10, the two side edges of each first support portion 110 on length direction Y are respectively connected with the edge on width direction X of corresponding second support portion 120 to form edge, to form cuboid mould body 10 around.

[0076] And the forming device further comprises a splicing structure, the splicing structure comprises a clamping assembly 20 corresponding to each of the at least one first support part 110, each clamping assembly 20 comprises an inner clamping piece 210 arranged inside the mold body 10 and an outer clamping piece 220 arranged on the rack and located outside the corresponding first support part 110 in the width direction X; a clamping driving assembly 230 is in transmission connection with at least one of the inner clamping piece 210 and the outer clamping piece 220 and drives the at least one of the inner clamping piece 210 and the outer clamping piece 220 to move in the width direction X; a traction driving assembly 240 is in transmission connection with at least one of the inner clamping piece 210 and the outer clamping piece 220 and drives the at least one of the inner clamping piece 210 and the outer clamping piece 220 to move in the height direction Z of the mold body 10.

[0077] The base material located below the mold body 10 has a pre-folded bag opening hem at both ends in the width direction X, the mold driving piece drives the mold body 10 to press the base material, the base material is folded to surround a pair of first support parts 110, and in the width direction X, the base material is folded towards the corresponding second support part 120 on both sides of the pair of first support parts 110 and partially overlaps to form a bag body of a packaging bag.

[0078] The clamping driving assembly 230 drives the corresponding outer clamping piece 220 and / or inner clamping piece 210 of the corresponding first support part 110 to move towards each other in the width direction X, so that the outer clamping piece 220 and the inner clamping piece 210 clamp the corresponding part of the base material; the traction driving assembly 240 drives the outer clamping piece 220 and / or the inner clamping piece 210 to move in the height direction Z, and drives the corresponding part of the base material to move relative to the first support part 110 in the height direction Z, so that the overlapping parts of the bag opening hem of the bag body in the area of the second support part 120 are spliced with each other.

[0079] The forming mold is provided with a splicing structure, that is, at least one first support part 110 of the mold body 10 is provided with a corresponding clamping assembly 20, so that the mold driving piece drives the mold body 10 to press the base material, the base material is folded to surround a pair of first support parts 110, and in the width direction X, the base material is folded towards the corresponding second support part 120 on both sides of the pair of first support parts 110 and partially overlaps to form a bag body of a packaging bag, then the clamping driving assembly 230 drives the inner clamping piece 210 and / or the outer clamping piece 220 to clamp the corresponding part of the base material, and drives the inner clamping piece 210 and / or the outer clamping piece 220 to move in the height direction Z through the traction driving assembly 240, so that the overlapping parts of the bag opening hem of the bag body in the area of the second support part 120 are spliced with each other, the processing of the bag opening hem is directly completed in the forming process, and the base material does not need to be additionally transported to a special bag opening machine after the packaging bag is formed, which greatly improves the production efficiency of the packaging bag.

[0080] In addition, the clamping assembly 20 ensures that the base material is not easily offset in other directions when moving in the height direction Z during the splicing process through the cooperation of the inner clamping piece 210 and the outer clamping piece 220, thereby improving the success rate and stability of the bag opening hem splicing.

[0081] Embodiment 1:

[0082] The forming device for packaging bags provided in this embodiment comprises a rack, a mold body 10 and a mold driving piece arranged on the rack, and the top of the mold body 10 is in transmission connection with the mold driving piece arranged on the rack. The bracket can be a solid structure formed by a frame beam and a table plate, and the bracket has a forming cavity below the mold body 10, which facilitates the downward pressing of the mold body 10 on the base material. The mold driving piece is used to drive the mold body 10 to press the base material below, which can be a driving motor commonly used in the forming equipment in the field and a transmission structure connected therewith, and the present embodiment does not make specific limitation thereto.

[0083] Specifically, as shown in Figure 1 A pair of first support portions 110 are arranged as a pair of first side walls 111, and a pair of second support portions 120 are arranged as a pair of second side walls 121.

[0084] When viewed along the height direction Z of the mold body 10, the profile formed by the pair of first side walls 111 and the pair of second side walls 121 is adapted to the cross-sectional peripheral shape of the packaging bag.

[0085] In order to adapt to bags of different lengths, each first side wall 111 can include two sub-side walls spaced apart in the length direction Y, each sub-side wall is connected with the corresponding second side wall 121 on the side away from each other in the width direction X, and the mold body 10 further includes a connecting frame 130 located between the two first side walls 111 in the width direction X and between the two second side walls 121 in the length direction Y, the connecting frame 130 has an adjusting assembly extending in the length direction Y, for example, by two groups of lead screws respectively connected with the two second side walls 121 on the side, so that the distance between the two second side walls 121 in the length direction Y can be adjusted. Of course, the structure of the first support part 110 and the second support part 120 is not limited to the above-mentioned side wall structure, and can also be provided as a plurality of support rods, a pair of first support parts 110 includes two groups of first support rod groups spaced apart in the width direction X of the mold body 10, each first support rod group is spaced apart in the length direction Y of the mold body 10 and includes a plurality of first support rods extending in the height direction Z, a pair of second support parts 120 includes two groups of second support rod groups spaced apart in the length direction Y of the mold body 10, each second support rod group is spaced apart in the width direction X of the mold body 10 and includes a plurality of second support rods extending in the height direction Z, when the underlying substrate is pressed and bent by the mold body 10, the above-mentioned first support rod group and the second support rod group can also support the bent substrate. Of course, the specific structure of the first support part 110 and the second support part 120 can meet the support function of the substrate, and those skilled in the art can design according to the actual situation and specific needs, and this embodiment is not limited in this regard.

[0086] In use, the mold body 10 of the packaging bag forming device is driven by the mold driving member and moves in the height direction Z of the mold body 10, thereby pressing the underlying substrate. It should be noted that the end portions of the substrate on both sides in the width direction X of the mold body 10 are pre-folded to form a bag opening before being pressed by the mold body 10. As viewed in the height direction Z of the mold body 10, the substrate on both sides in the width direction X of the mold body 10 is pressed and bent by the mold body 10 to surround a pair of first support parts 110 of the mold body 10. And in the width direction X, the substrate is bent and partially overlaps on both sides of the pair of first support parts 110 towards the corresponding second support parts 120, forming a bag body of the packaging bag.

[0087] In order to make the substrate bend toward the corresponding second support 120 on both sides of the pair of first support portions 110, the forming apparatus also includes a pair of side insert components disposed on the frame. The forming apparatus also includes a pair of side insert components disposed on the frame and located on both sides of the mold body 10 in the length direction Y. Each side insert component includes a side insert plate disposed on the mold body 10 at intervals in the width direction X corresponding to the two sides of the second support portion 120. Each side insert plate is connected to a side insert drive member disposed at a corresponding position on the frame. The side insert drive member can be a cylinder or motor commonly used in the art.

[0088] When the mold drive unit drives the mold body 10 to press the substrate, and the substrate bends to surround a pair of first support portions 110, each side insertion drive unit drives the corresponding side insertion plate to move toward the mold body 10 along the width direction X, so that the substrate bends toward the corresponding second support portion 120 on both sides of the pair of first support portions 110. On the one hand, the side insertion plate can make the substrate cover the corresponding second support portion 120 on both sides in the width direction X; on the other hand, the insertion plate can make the substrate fold outward at a predetermined angle on both sides of the pair of first support portions 110. Taking the second support portion 120 on one side as an example, the substrates on both sides in the width direction X bend toward each other, and there is an overlap in the area of ​​the second support portion 120. The substrate on the side away from the mold body 10 will be slightly open compared to the substrate close to the inner side of the mold body 10. That is, the pair of side insertion plates are completely aligned in the width direction X. In the subsequent insertion process, it is beneficial for the bag opening fold and the corresponding substrate close to the inner side of the mold body 10 to be smoothly inserted between the bag opening fold and the corresponding substrate on the side away from the mold body 10.

[0089] Of course, the forming device may also include sealing components, bag-removing components, etc. For example, the sealing components include sealing members respectively arranged on both sides of the mold body 10 in the length direction Y. The sealing members can press the overlapping part of the substrate in the second area to seal the bag. The bag-removing components include bag-removing belts respectively arranged on both sides of the mold body 10 in the width direction X. After the bag is formed, the bag is removed from the mold body 10. Regarding some conventional structures on the forming device, those skilled in the art can design them according to the actual situation and specific needs. This embodiment does not limit them to a single one.

[0090] Furthermore, such as Figure 2 As shown, in this embodiment, the plug-in structure includes a clamping assembly 20 corresponding to a first support portion 110. This clamping assembly 20 includes an inner clamping member 210 disposed inside the mold body 10, and an outer clamping member 220 disposed on the frame and located outside the corresponding first support portion 110 in the width direction X.

[0091] And, in the width direction X, the outer surface of the outer clamping piece 220 is arranged spaced apart from the outer surface of the at least one first support part 110, the clamping driving assembly 230 comprises an outer clamping driving piece 231 arranged on the rack and in transmission connection with the outer clamping piece 220, and in the process of inserting, the outer clamping driving piece 231 drives the outer clamping piece 220 to move along the width direction X towards the inner clamping piece 210 until the outer clamping piece 220 and the inner clamping piece 210 are pressed tightly on the corresponding parts of the base material, realizing clamping of the base material. This clamping method only realizes clamping of the base material by moving the inner clamping piece 210 along the width direction X, and the inner clamping piece 210 is passively abutted on the corresponding parts of the base material, without the need to set a driving piece matched with the inner clamping piece 210 and a transmission structure, reducing the components in the mold body 10, reducing the weight of the mold body 10, and being beneficial to replacement and maintenance of the mold body 10.

[0092] More specifically, the traction driving assembly 240 comprises an outer traction driving piece 241 located outside the mold body 10 and in transmission connection with the outer clamping piece 220, and an inner traction driving piece 242 arranged inside the mold body 10 and in transmission connection with the inner clamping piece 210, the inner traction driving piece 242 drives the inner clamping piece 210 to move along the height direction Z, and the outer traction driving piece 241 drives the outer clamping piece 220 to move along the height direction Z synchronously, which can ensure that the moving speed and distance of the two in the height direction Z are completely consistent, avoid wrinkles of the base material caused by different moving speeds, and greatly improve the insertion qualification rate. At the same time, for special base materials with uneven thickness and large elasticity, synchronous driving can uniformly apply traction force to prevent local stretching deformation of the base material.

[0093] In the present embodiment, the inner clamping piece 210 can comprise an inner support 2110 and an inner clamping belt 2111 arranged on the inner support 2110, the inner support 2110 is fixed in the mold body 10, and the inner clamping belt 2111 is sleeved on a plurality of inner support rollers arranged spaced apart along the height direction Z on the inner support 2110, for example, two inner support rollers are arranged spaced apart along the height direction Z on the inner support 2110, and the inner clamping belt 2111 is sleeved on the two inner support rollers on the inner support 2110. Of course, three, four or other number of inner support rollers can also be arranged spaced apart along the height direction Z on the inner support 2110, and the present embodiment does not make a unique limitation in this regard.

[0094] Furthermore, the inner traction drive component 242 is configured as an inner traction motor, which is fixed on the inner bracket 2110 and connected to one of the multiple inner support rollers. Specifically, the inner traction motor is connected to the uppermost inner support roller among the multiple inner support rollers. When the output shaft of the inner traction motor extends along the height direction Z, a bevel gear set is provided between the output shaft of the traction motor and the corresponding inner support roller. When the output shaft of the inner traction motor extends along the length direction Y, the output shaft of the traction motor is fixedly connected to the corresponding inner support roller through a coupling.

[0095] Furthermore, the outer clamping member 220 includes an outer support 2210 and an outer clamping belt 2211 disposed on the outer support 2210. The outer clamping belt 2211 is sleeved on a plurality of outer support rollers spaced at intervals along the height direction Z on the outer support 2210. The outer clamping drive member 231 is an outer clamping drive motor disposed on the frame. The output end of the outer clamping drive motor extends along the width direction X and is connected to the inner support 2110 for transmission. The outer traction drive member 241 is an outer traction drive motor, which is fixed on the outer support 2210 and is connected to one of the plurality of outer support rollers for transmission. It should be noted that the structure of the outer clamping member 220 is similar to that of the inner clamping member 210, and will not be described in detail here.

[0096] In this embodiment, both the inner clamping member 210 and the outer clamping member 220 contact the corresponding surface of the substrate through the outer surface of the belt, ensuring that the inner clamping member 210 and the outer clamping member 220 have a large contact area with the substrate, and the pressure applied to the substrate is more uniform. In addition, since the belt has a certain elasticity, when the substrate has a slight displacement, the inner clamping belt 2111 and the outer clamping belt 2211 on both sides can be slightly deformed to adapt, avoiding squeezing damage to the substrate.

[0097] like Figure 1 As shown, when the first side wall 111 of the first support part 110 includes two sub-side walls, each sub-side wall is provided with an inner clamping belt 2111, and the outer surface of the inner clamping belt 2111 in the width direction X is flush with the surface of the corresponding sub-side wall. Similarly, two outer clamping belts 2211 and two inner clamping belts 2111 are provided.

[0098] Of course, such as Figure 3 As shown, in this embodiment, the inner clamping member 210 may also include an inner frame 2112 and a plurality of inner clamping rollers 2113 spaced apart along the height direction Z on the inner frame 2112. The inner traction drive member 242 is connected to the plurality of inner clamping rollers 2113 via a transmission belt.

[0099] And the outer clamping member 220 also comprises an outer frame 2212, and a plurality of outer clamping rollers 2213 which are arranged on the outer frame 2212 in the height direction Z, the outer clamping drive member 231 is in transmission connection with the outer frame 2212, and the outer traction drive member 241 is connected with the plurality of outer clamping rollers 2213 through a transmission belt. It should be noted that the number of the inner clamping rollers 2113 and the outer clamping rollers 2213 is the same, which can be two, three, four, ten or other numbers, and the embodiment does not make specific limitation hereon.

[0100] In the embodiment, the inner clamping member 210 and the outer clamping member 220 both adopt a plurality of clamping rollers which are arranged in the height direction Z, and form multi-point support when contacting the corresponding surface of the substrate, which can better fit the substrate surface (especially for the substrate with slight curvature or uneven thickness, to avoid the substrate slipping during clamping, and improve the position accuracy during the bag opening insertion. In addition, compared with the clamping member composed of a belt, the support force of the rigid clamping roller is stronger, which can stably clamp the medium-thick or high-hardness substrate such as paper and composite woven fabric, and prevent the substrate from deforming during traction.

[0101] It should be noted that, similar to the clamping belt, when the first side wall 111 of the first support part 110 comprises two sub-side walls, the inner clamping rollers 2113 and the outer clamping rollers 2213 can also be arranged as corresponding two groups, respectively corresponding to the two sub-side walls.

[0102] Further, as shown in Figure 4 The insertion structure can also comprise a guide assembly 250, which comprises an inner guide member 252 arranged inside the mold body 10, and an outer guide member 251 arranged on the rack, the outer guide member 251 is located outside the at least one first support part 110 in the width direction X, and the inner guide member 252 and the outer guide member 251 both extend in the height direction Z.

[0103] Among them, the inner clamping member 210 is slidably arranged on the inner guide member 252 in the height direction Z, and the outer clamping member 220 is slidably arranged on the outer guide member 251 in the height direction Z.

[0104] Specifically, the inner guide member 252 and the outer guide member 251 can both be arranged as guide grooves, guide rails or guide rods which extend in the height direction Z, the inner mounting seat 2114 of the inner clamping member 210 is in sliding connection with the inner guide member 252, and the outer mounting seat 2214 of the outer clamping member 220 is in sliding connection with the outer guide member 251.

[0105] In the embodiment, the inner guide 252 and the outer guide 251 are arranged along the height direction Z and constrain the sliding paths of the inner and outer clamping members 220 respectively, so that the left and right deviation or the front and back deviation caused by uneven force during traction is avoided, and the accurate insertion of the overlapping part of the base material in the area of the second support part 120 is improved, and the bag opening is strengthened.

[0106] In addition, when the clamping member moves along the height direction Z, the gravity and the reaction force of the base material can be transmitted to the mold body 10 or the rack through the guide, so that the force is not directly applied to the traction driving assembly 240 (such as the motor and the transmission rod), and the wear and failure probability of the driving assembly are reduced.

[0107] In the embodiment, when the insertion structure includes the guide assembly 250, the inner clamping member 210 further includes an inner mounting seat 2114 and an inner clamping plate 2115 arranged on the inner mounting seat 2114, the inner guide 252 and the inner traction driving member 242 are arranged on the surface of the inner mounting seat 2114 on the side of the inner clamping member 210 in the width direction X, and the inner clamping plate 2115 is slidingly arranged on the inner guide 252 and is in transmission connection with the output end of the inner traction driving member 242.

[0108] In addition, the outer clamping member 220 also includes an outer mounting seat 2214 and an outer clamping plate 2215 arranged on the outer mounting seat 2214, the surface of the outer mounting seat 2214 on the side away from the inner clamping member 210 in the width direction X is in transmission connection with the outer clamping driving member 231 arranged on the rack, the outer guide 251 and the outer traction driving member 241 are arranged on the surface of the outer mounting seat 2214 on the side of the inner clamping member 210 in the width direction X, and the outer clamping plate is slidingly arranged on the outer guide 251 and is in transmission connection with the output end of the outer traction driving member 241.

[0109] It should be noted that the inner mounting seat 2114 can also be slidingly arranged on the inner guide 252, the inner clamping plate 2115 is arranged on the inner mounting seat 2114, the output end of the inner traction driving member 242 is connected with the inner mounting seat 2114, and the outer mounting seat 2214 is also slidingly arranged on the outer guide 251, the surface of the outer guide 251 on the side away from the inner clamping member 210 is fixedly connected with the output end of the outer clamping driving member 231, and the outer traction driving member 241 is arranged on the outer mounting seat 2214 and the output end thereof is fixedly connected with the outer clamping plate 2215.

[0110] In the embodiment, the inner clamping member 210 and the outer clamping member 220 clamp through the clamping plate, which can more reliably and stably clamp the corresponding part of the base material and reduce the slippage caused by insufficient local pressure. In addition, compared with the clamping belt and the clamping roller group, the clamping plate is more flexible in design and occupies less space, which is more conducive to the space arrangement inside the mold body 10 and on the rack.

[0111] Further, the surfaces of the inner clamping plate 2115 and the outer clamping plate 2215 facing each other are provided with a flexible layer, which can buffer the rigid pressure of the clamping plate and reduce the extrusion marks on the outer surface of the substrate; at the same time, the flexible material has a high friction coefficient and a smooth surface, which can avoid scratches caused by hard contact during clamping. In addition, the flexible layer has a certain elasticity and can deform with the slight ups and downs of the surface of the substrate (such as the wrinkles of the pre-folded edge and the thickness deviation), fill the contact gap, and increase the effective clamping area, thereby improving the wrapping force on the substrate and preventing the substrate from slipping during traction.

[0112] Of course, the surfaces of the inner clamping plate 2115 and the outer clamping plate 2215 facing each other can also be provided with a plurality of air suction ports, for example, three, four, five, seven or other numbers of air suction holes, which are uniformly distributed on the surfaces of the inner clamping plate 2115 and the outer clamping plate 2215 facing each other. Each air suction port is in communication with an external air suction device through a pipeline. The suction force generated by the air suction hole can make the substrate flatly adhere to the surface of the clamping plate, avoiding local wrinkles or deviation of the substrate during traction.

[0113] The clamping assembly 20 of the forming device will be described below in combination with the insertion process.

[0114] As shown in Figure 5 and Figure 6 , taking the inner clamping member 210 and the outer clamping member 220 as an example, after the substrate is bent and partially overlapped on both sides of a pair of first support portions 110 to form the bag body of the packaging bag towards the corresponding second support portions 120, the outer traction driving member 241 drives the outer clamping member 220 to move along the width direction X towards the substrate until the outer clamping belt 2211 of the outer clamping member 220 and the inner clamping belt 2111 of the inner clamping member 210 clamp the corresponding parts of the substrate. At this time, the outer traction driving member 241 drives the outer clamping belt 2211 to move, so that the part of the outer clamping belt 2211 close to the substrate side moves downward along the height direction Z, and the inner traction driving member 242 drives the inner clamping belt 2111 to move, so that the part of the inner clamping belt 2111 close to the substrate side moves downward along the height direction Z synchronously. The bag body fold edges of the substrate on both sides of the width direction X form a height difference in the area of each second support portion 120, as shown in Figure 6 , the corresponding side of the substrate on the width direction X is driven to move downward along the height direction Z, and the bag opening fold edge of the corresponding side of the substrate on the width direction X is completely staggered with the bag opening fold edge of the other side on the height direction Z. It should be noted that, as shown in Figure 7As shown, the overlapping part of the side substrate clamped by the clamping assembly 20 in the area of the second support part 120 is on the side close to the mold body 10, that is, in the process of moving the bag opening flaps and the substrate on the side close to the mold body 10 downward, when the inner clamping part 210 and the outer clamping part 220 are driven upward along the height direction Z by the inner traction driving part 242 and the outer traction driving part 241 respectively, the bag opening flaps and the substrate on this side will be inserted between the substrate and the bag opening flaps on the other side.

[0115] In this embodiment, only the part on one side of the clamping assembly 20 needs to be displaced in the width direction X during the insertion process, and the part on the other side does not need to be displaced, so the probability of damage to the substrate during the insertion process is relatively small, and the volume of the molding equipment in the width direction X is smaller, which is suitable for scenes where the workshop space is limited and the equipment layout is compact.

[0116] Embodiment 2:

[0117] Different from embodiment 1, in this embodiment, as shown in Figure 8 when the mold body 10 has sufficient installation space in the width direction X, the outer surface of the inner clamping part 210 is recessed inward relative to the outer surface of the first support part 110 in the width direction X, the clamping driving assembly 230 includes an inner clamping driving part 232 arranged in the mold body 10 and in transmission connection with the inner clamping part 210, and the inner clamping driving part 232 drives the inner clamping part 210 to move in the width direction X, without the need to arrange the outer clamping driving part 231, thereby reducing the components arranged on the rack.

[0118] When the inner clamping part 210 includes an inner support 2110 and an inner clamping belt 2111 arranged on the inner support 2110, the inner clamping driving part 232 is arranged as an inner clamping driving motor fixed inside the mold body 10, the output end of the inner clamping driving motor extends along the width direction X and is in transmission connection with the inner support 2110, the inner clamping driving motor drives the inner support 2110 and the inner clamping belt 2111 to move outward along the width direction X until the inner clamping belt 2111 cooperates with the outer clamping belt 2211 to clamp the substrate; when the inner clamping part 210 includes an inner frame 2112 and a plurality of inner clamping rollers 2113 arranged on the inner frame 2112 in the height direction Z, the output end of the inner clamping driving part 232 extends along the width direction X and is in transmission connection with the inner frame 2112; when the inner clamping part 210 includes an inner mounting seat 2114 and an inner clamping plate 2115 arranged on the inner mounting seat 2114, the surface of the inner mounting seat 2114 on the side away from the outer clamping part 220 in the width direction X is in transmission connection with the inner clamping driving part 232 arranged in the mold body 10.

[0119] Of course, asFigure 9 As shown, when there is sufficient installation space in the width direction X both inside the mold body 10 and on the frame, the outer surface of the inner clamping member 210 is recessed inward relative to the outer surface of at least one first support portion 110 in the width direction X, and the outer surface of the outer clamping member 220 is spaced apart from at least one first support portion 110. The clamping drive assembly 230 includes an outer clamping drive member 231 disposed on the frame and pulsatorically connected to the outer clamping member 220, and an inner clamping drive member 232 disposed inside the mold body 10 and pulsatorically connected to the inner clamping member 210. The inner clamping drive member 232 drives the inner clamping member 210, and the outer clamping drive member 231 drives the outer clamping member 220 to move towards or away from each other in the width direction X.

[0120] It should be noted that the connection structure between the outer clamping drive member 231 and the inner clamping member 210 is similar to that in Embodiment 1, and will not be described again here.

[0121] When the clamping drive includes an inner clamping drive 232 and an outer clamping drive 231, the inner clamping member 210 and the outer clamping member 220 can simultaneously apply pressure to the substrate from both sides in the width direction X, thus clamping the substrate more stably and reliably and preventing the substrate from slipping due to insufficient pressure or breaking due to excessive pressure. In addition, the inner clamping member 210 is recessed relative to the outer surface of the first support portion 110, and the spacing of the outer clamping member 220 provides space for substrate bending. Even if the substrate on the first support portion 110 experiences a slight displacement in the width direction X, the position of the substrate can be adjusted through bidirectional clamping.

[0122] Example 3:

[0123] Unlike Embodiments 1 and 2, in this embodiment, as Figure 10 As shown, the traction drive assembly 240 may include only an external traction drive 241 mounted on the frame and connected to the external clamping member 220 in a transmission manner. The external traction drive 241 drives the external clamping member 220 to move along the height direction Z, and the internal clamping member 210 follows along the height direction Z.

[0124] In this embodiment, the internal traction drive component 242 and its supporting transmission structure are omitted, reducing the complexity inside the mold body 10 and significantly reducing manufacturing and maintenance costs.

[0125] Furthermore, such as Figure 11 As shown, the traction drive unit may also include an inner traction drive unit 242 disposed inside the mold body 10 and connected to the inner clamping member 210 in a transmission manner. The inner traction drive unit 242 drives the inner clamping member 210 to move along the height direction Z, and the outer clamping member 220 follows along the height direction Z. Similarly, when the traction drive assembly 240 only includes the inner traction drive unit 242, the components set on the frame can be simplified.

[0126] It should be noted that in the present embodiment, the structure of the outer clamping driving member 241 and the outer clamping member 220, and the structure of the inner clamping driving member 242 and the inner clamping member 210 are similar to those in Embodiment 1, and thus will not be described again here.

[0127] In addition, regarding the structure of the clamping driving assembly 230, the structure in Embodiment 1 or Embodiment 2 can be adopted.

[0128] Embodiment 4:

[0129] Different from Embodiments 1, 2 and 3, in the present embodiment, the insertion structure includes a pair of clamping assemblies 20 corresponding to the pair of first support portions 110 respectively.

[0130] The clamping driving assembly 230 corresponding to each first support portion 110 drives the clamping assembly 20 to clamp the corresponding part of the base material, wherein the clamping driving assembly 240 corresponding to one of the first support portions 110 drives the outer clamping member 220 and / or the inner clamping member 210 to move downward along the height direction Z, and the clamping driving assembly 240 corresponding to the other first support portion 110 drives the outer clamping member 220 and / or the inner clamping member 210 to move upward along the height direction Z, so that the bag body flaps on both sides of the base material in the width direction X form a height difference in the area of each second support portion 120, wherein the clamping driving assembly 240 corresponding to one of the first support portions 110 drives the outer clamping member 220 and / or the inner clamping member 210 to move upward along the height direction Z, and the clamping driving assembly 240 corresponding to the other first support portion 110 drives the outer clamping member 220 and / or the inner clamping member 210 to move downward along the height direction Z, so that the bag opening flaps of the base material are inserted at the overlapping position in the area of the second support portion 120.

[0131] Such a forming device requires displacement of the base material on both sides in the width direction X during the insertion process. Under the premise that the displacement of the parts on both sides is small, the insertion success rate of the bag opening flaps at the overlapping position in the area of the second support portion 120 is ensured.

[0132] Of course, in the present embodiment, each clamping assembly 20 can adopt any one of the structures in Embodiments 1, 2 or 3 described above, and the present embodiment does not make a unique limitation in this regard.

[0133] It should be noted that in addition to the specific embodiments described above, other advantages and benefits of the present application can be readily understood by those skilled in the art from the disclosure contained herein. Although the present application has been described in connection with the preferred embodiments thereof, it will be understood that the application is not limited to the preferred embodiments, and that there are many alternatives, modifications and variations which will be apparent to those skilled in the art in light of the above teachings. Accordingly, the application is intended to embrace all such alternatives, modifications and variations as can fall within the scope of the claims. To provide for a complete disclosure of the present application, the above description contains a number of specific details. However, it is to be understood that the application can be practiced without these specific details. In other instances, well-known methods, structures and techniques have not been described in detail in order to avoid obscuring the application. Also, some specific details have been left out in order to not obscure the application in unnecessary detail. In addition, it should be understood that the drawings are not to scale and in certain instances details have been omitted in order to convey a clear understanding of the present application.

[0134] It should be noted that in this specification, similar reference numbers and letters in the following drawings represent similar items, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0135] In the description of the present embodiments, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0136] The terms "first", "second", etc. are only used for differentiation in description and cannot be understood as indicating or implying relative importance.

[0137] In the description of the present embodiments, it should also be noted that unless otherwise explicitly specified and limited, the terms "provided", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present embodiments can be understood according to the specific circumstances.

[0138] Although the utility model has been illustrated and described by referring to certain preferred embodiments of the utility model, it should be understood by those skilled in the art that the above content is the further detailed description of the utility model combined with the specific embodiments, and the specific implementation of the utility model cannot be limited to these descriptions. Those skilled in the art can make various changes in form and details, including making several simple inferences or replacements, without departing from the spirit and scope of the utility model.

Claims

1. A forming device for packaging bags, comprising a frame, a mold body and a mold driving member arranged on the frame, the top of the mold body being drivingly connected with the mold driving member arranged on the frame; characterized in that, the mold body comprises a pair of first support portions arranged at intervals along the width direction of the mold body, and a pair of second support portions arranged at intervals along the length direction of the mold body, the two side edges of each first support portion in the length direction respectively meet the edges of the corresponding second support portion in the width direction to form a ridge; and the forming device further comprises a plug structure, the plug structure comprising a clamping assembly corresponding to each first support portion, each clamping assembly comprising an inner clamping member arranged inside the mold body, and an outer clamping member arranged on the frame and outside the corresponding first support portion in the width direction; a clamping driving assembly is drivingly connected with at least one of the inner clamping member and the outer clamping member, and drives the at least one of the inner clamping member and the outer clamping member to move in the width direction; a traction driving assembly is drivingly connected with at least one of the inner clamping member and the outer clamping member, and drives the at least one of the inner clamping member and the outer clamping member to move in the height direction of the mold body; a substrate arranged below the mold body has pre-folded bag opening flaps at both ends in the width direction, the mold driving member drives the mold body to press the substrate, the substrate is bent to surround the pair of first support portions, in the width direction, the substrate is bent and partially overlaps on both sides of the pair of first support portions respectively towards the corresponding second support portion, forming a bag body of a packaging bag; and the clamping driving assembly drives the corresponding outer clamping member and / or the inner clamping member of the corresponding first support portion to move towards each other in the width direction, so that the outer clamping member and the inner clamping member clamp the corresponding part of the substrate; the traction driving assembly drives the outer clamping member and / or the inner clamping member to move in the height direction, driving the corresponding part of the substrate to move relative to the first support portion in the height direction, so that the overlapping parts of the bag opening flaps of the bag body in the area of the second support portion are plugged with each other.

2. The forming apparatus for a packaging bag according to claim 1, wherein wherein, in the width direction, the outer surface of the inner clamping member is concave inwardly relative to the outer surface of at least one first support portion, the outer surface of the outer clamping member is arranged at intervals with at least one first support portion, the clamping driving assembly comprises an outer clamping driving member arranged on the frame and drivingly connected with the outer clamping member, and an inner clamping driving member arranged inside the mold body and drivingly connected with the inner clamping member, the inner clamping driving member drives the inner clamping member, and the outer clamping driving member drives the outer clamping member to move towards or away from each other in the width direction; or In the width direction, the outer surface of the outer clamping member is spaced apart from the outer surface of at least one of the first support portions, the clamping driving assembly comprises the outer clamping driving member arranged on the rack and in transmission connection with the outer clamping member, the outer clamping driving member drives the outer clamping member to move along the width direction; or, In the width direction, the outer surface of the inner clamping member is inwardly recessed relative to the outer surface of at least one of the first support portions, the clamping driving assembly comprises the inner clamping driving member arranged in the mold body and in transmission connection with the inner clamping member, the inner clamping driving member drives the inner clamping member to move along the width direction.

3. The forming apparatus for a packaging bag according to claim 2, wherein Wherein, The traction driving assembly comprises the inner traction driving member arranged in the mold body and in transmission connection with the inner clamping member, and the outer traction driving member located outside the mold body and in transmission connection with the outer clamping member, the inner traction driving member drives the inner clamping member to move along the height direction, and the outer traction driving member drives the outer clamping member to synchronously move along the height direction; or, The traction driving assembly comprises the outer traction driving member arranged on the rack and in transmission connection with the outer clamping member, the outer traction driving member drives the outer clamping member to move along the height direction, and the inner clamping member follows along the height direction; or The traction driving assembly comprises the inner traction driving member arranged in the mold body and in transmission connection with the inner clamping member, the inner traction driving member drives the inner clamping member to move along the height direction, and the outer clamping member follows along the height direction.

4. The forming apparatus for a packaging bag according to claim 3, wherein Wherein, The inner clamping member comprises an inner support and an inner clamping belt arranged on the inner support, the inner clamping belt is sleeved on a plurality of inner support rollers arranged in the height direction on the inner support, the inner clamping driving member is arranged as an inner clamping driving motor fixed in the mold body, the output end of the inner clamping driving motor extends along the width direction and is in transmission connection with the inner support, the inner traction driving member is arranged as an inner traction motor fixed on the inner support and in transmission connection with one of the plurality of inner support rollers; and The outer clamping member comprises an outer support and an outer clamping belt arranged on the outer support, the outer clamping belt is sleeved on a plurality of outer support rollers arranged in the height direction on the outer support, the outer clamping driving member is arranged as an outer clamping driving motor on the rack, the output end of the outer clamping driving motor extends along the width direction and is in transmission connection with the inner support, the outer traction driving member is arranged as an outer traction driving motor fixed on the outer support and in transmission connection with one of the plurality of outer support rollers.

5. The forming apparatus for a packaging bag according to claim 3, wherein The inner clamping member comprises an inner frame and a plurality of inner clamping rollers arranged in the height direction on the inner frame, the inner clamping driving member is in transmission connection with the inner frame, and the inner traction driving member is connected with the plurality of inner clamping rollers through a transmission belt; and The outer clamping member comprises an outer frame and a plurality of outer clamping rollers arranged in the height direction on the outer frame, the outer clamping driving member is in transmission connection with the outer frame, and the outer traction driving member is connected with the plurality of outer clamping rollers through a transmission belt. The outer clamping member comprises an outer frame and a plurality of outer clamping rollers arranged on the outer frame in the height direction, the outer clamping drive member is in transmission connection with the outer frame, and the outer traction drive member is connected with the plurality of outer clamping rollers through a transmission belt.

6. The forming apparatus for a packaging bag according to claim 3, wherein The plug-in structure further comprises a guide assembly, the guide assembly comprises an inner guide arranged inside the mold body and an outer guide arranged on the rack, the outer guide is located outside at least one of the first support parts in the width direction, and the inner guide and the outer guide are both arranged along the height direction; Wherein The inner clamping member is slidably arranged on the inner guide in the height direction, and the outer clamping member is slidably arranged on the outer guide in the height direction.

7. The forming apparatus for a packaging bag according to claim 6, wherein Wherein The inner clamping member comprises an inner mounting seat and an inner clamping plate arranged on the inner mounting seat, the surface of the inner mounting seat on the side away from the outer clamping member in the width direction is in transmission connection with the inner clamping drive arranged inside the mold body, the inner guide and the inner traction drive are arranged on the surface of the inner mounting seat on the side towards the outer clamping member in the width direction, and the inner clamping plate is slidably arranged on the inner guide and in transmission connection with the output end of the inner traction drive; and The outer clamping member comprises an outer mounting seat and an outer clamping plate arranged on the outer mounting seat, the surface of the outer mounting seat on the side away from the inner clamping member in the width direction is in transmission connection with the outer clamping drive arranged on the rack, the outer guide and the outer traction drive are arranged on the surface of the outer mounting seat on the side towards the inner clamping member in the width direction, and the outer clamping plate is slidably arranged on the outer guide and in transmission connection with the output end of the outer traction drive.

8. The forming apparatus for a packaging bag according to claim 7, wherein The surfaces of the inner clamping plate and the outer clamping plate facing each other are provided with a flexible layer; or The surfaces of the inner clamping plate and the outer clamping plate facing each other are provided with a plurality of air suction ports, and each air suction port is in communication with an external air suction device through a pipeline.

9. The forming apparatus for a packaging bag according to any one of claims 1 to 8, characterized in that, The plug-in structure comprises a clamping assembly corresponding to one of the first support parts; The clamping drive assembly drives the clamping assembly to clamp the corresponding part of the base material, the traction drive assembly drives the outer clamping member and / or the inner clamping member to move downward in the height direction, so that the bag body flaps of the base material on both sides in the width direction form a height difference in the area of each second support part, the traction drive assembly drives the outer clamping member and / or the inner clamping member to move upward in the height direction, and the bag opening flaps of the base material overlap with each other at the plug-in position in the area of the second support part; or The plug-in structure comprises a pair of clamping assemblies corresponding to the pair of first support parts respectively. The clamping drive assembly corresponding to each of the first support portions drives the clamping assembly to clamp a corresponding portion of the base material, one of the traction drive assemblies corresponding to one of the first support portions drives the outer clamping member and / or the inner clamping member to move downward along the height direction, and the traction drive assembly corresponding to the other first support portion drives the outer clamping member and / or the inner clamping member to move upward along the height direction, so that the bag flaps on both sides of the base material in the width direction form a height difference in the area of each of the second support portions; one of the traction drive assemblies corresponding to one of the first support portions drives the outer clamping member and / or the inner clamping member to move upward along the height direction, and the traction drive assembly corresponding to the other first support portion drives the outer clamping member and / or the inner clamping member to move downward along the height direction, and the bag flaps of the base material overlap with each other at the overlapping portion in the area of the second support portion.

10. The forming apparatus for a packaging bag according to any one of claims 1 to 8, characterized in that, The forming device further comprises a pair of side insertion components arranged on the rack and located on both sides of the mold body in the length direction, each of the side insertion components comprising a side insertion plate arranged on the mold body and corresponding to both sides of the second support portion in the width direction, and each of the side insertion plates is in transmission connection with a side insertion drive arranged at a corresponding position on the rack; wherein Each of the side insertion drives drives the corresponding side insertion plate to move toward the mold body in the width direction, so that the base material is bent toward the corresponding second support portion on both sides of the pair of first support portions, respectively.

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