A manufacturing process for a bottom-inserted stand-up bag

Abstract

The present invention provides a manufacturing process for a bottom-inserted self-supporting bag, which belongs to the technical field of bag making and comprises the following steps: S1: inputting front and rear bag sheets, S2: cutting the front and rear bag sheets, S3: inputting double-inserted bottom sheets, S4: bending the double-inserted bottom sheets, S5: correcting the deviation and punching the double-inserted bottom sheets, S6: inserting the double-inserted bottom sheets, S7: heat-sealing the bag body, and S8: cutting into independent bag bodies. The present invention provides a one-out-two bag making process, which improves production efficiency. At the same time, printing adopts one-time molding printing, which avoids the problem of color difference between the front and rear bag surfaces. Moreover, the front bag surface and the back bag surface adopt the same piece of fabric, which ensures consistent physical and mechanical properties and solves the problem of inconsistent fabric deformation and thus pattern inconsistency caused by the influence of the environment and process during production. By adopting photoelectric eyes to identify information, the problem of information on it being unable to be centered due to deviation of the bottom-inserted sheet is avoided, and at the same time, the punching positions on the double-inserted bottom sheet are accurate and consistent, thereby improving the heat sealing effect of the bag body.

Description

Technical Field

[0001] The invention relates to the technical field of bag making, in particular to a manufacturing process of a bottom-inserted stand-up bag. Background Art

[0002] A stand-up bag with an inserted bottom refers to a soft packaging bag with a horizontal support structure at the bottom. It does not rely on any support and can stand on its own regardless of whether the bag is opened or not. Stand-up bags are a relatively new form of packaging, and have advantages in many aspects such as improving product grade, enhancing shelf visual effects, being easy to carry, convenient to use, keeping fresh and sealable. A common stand-up bag with an inserted bottom includes a front bag piece, a back bag piece and an inserted bottom piece. The two sides of the front bag piece and the back bag piece are heat-sealed to form the bag body. The inserted bottom piece is heat-sealed between the lower ends of the front bag piece and the back bag piece. The upper ends of the front bag piece and the back bag piece can be installed with zippers, nozzles, handles or directly heat-sealed, etc., depending on the type of bag body. The front bag piece, the back bag piece and the inserted bottom piece can be printed with information, generally including pattern information and text information. For example, a high-strength stand-up composite packaging bag disclosed in the Chinese patent with publication number CN213324524U.

[0003] In order to improve the production efficiency of self-supporting bags with inserted bottoms, automated equipment is usually used for their production. The self-supporting bags with inserted bottoms currently produced are either blank bags with no information on the bottom, or printed with information. Since the bottom is inserted separately, once the front and back deviation problem occurs during the production process, all subsequent bottom surfaces will not be in the middle of the bag bottom, affecting the appearance and reducing the yield. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art and to provide a manufacturing process for a bottom-inserted stand-up bag.

[0005] The technical solution adopted by the present invention is as follows: a manufacturing process for a bottom-inserted self-supporting bag, comprising a double-inserted bottom sheet and front and rear pocket sheets arranged in rolls, wherein the double-inserted bottom sheet comprises two parallel bottom-inserted sheets, and the bottom-inserted sheet comprises a plurality of bottom-inserted sheets arranged in sequence, the front and rear pocket sheets comprise a double front pocket sheet and a double rear pocket sheet arranged in sequence, the double front pocket sheet comprises two parallel front pocket sheets, the double rear pocket sheet comprises two parallel rear pocket sheets, the front pocket sheet comprises a plurality of front pocket sheets arranged in sequence, and the rear pocket sheet comprises a plurality of rear pocket sheets arranged in sequence, the information on the double-inserted bottom sheet is printed in one-step molding, and the information on the front and rear pocket sheets is printed in one-step molding;

[0006] The following steps are included:

[0007] S1: Input the front and rear bag sheets, install the rolled front and rear bag sheets on the material rack and feed them through the material roller in the form of front and rear bag sheets;

[0008] S2: Cutting the front and back bag sheets into double front bag sheets and double back bag sheets, and transporting them separately;

[0009] S3: Input the double-inserted bottom sheet, install the rolled double-inserted bottom sheet on the material rack, and feed it through the material roller in the form of double-inserted bottom sheet;

[0010] S4: Bending the double-inserted bottom sheet, bending both sides of the double-inserted bottom sheet toward the center line of the conveying direction into an inserted bottom shape, and continuing to convey in this shape;

[0011] S5: Double-insertion sheet material deviation correction and punching: the photoelectric eye recognizes the information on each insert sheet, and then the servo motor controls the traction roller to adjust the double-insertion sheet material feeding speed. At the same time, the insert sheet material is punched at the designated position during the conveying process.

[0012] S6: inserting a double-inserted bottom sheet, inserting the double-inserted bottom sheet between the double front pocket sheet and the double back pocket sheet to form a double-pocket sheet, wherein the double-pocket sheet includes two bag sheets arranged in parallel, and the bag sheet includes a plurality of bags arranged in sequence, and the double-inserted bottom sheet is arranged along the dividing line between the two bag sheets on the double-pocket sheet;

[0013] S7: Heat-seal the bag body, heat-seal the bottom of the bag body on the double bag sheet, and then heat-seal the two sides of the bag body;

[0014] S8: Cutting into independent bags, cutting the double bag sheet into individual bags.

[0015] The steps S1, S2, S3, S4 and S5 are performed synchronously.

[0016] In the steps S1 and S3, a storage rack is used to store front and rear bag sheets and double-inserted bottom sheets of a certain length.

[0017] The photoelectric eye identifies information based on the difference in color between the information and the base band.

[0018] The punching position is located on the dividing line between adjacent bags on the double-bag sheet.

[0019] The step S6 further includes: inserting a zipper, wherein the zipper and the double-inserted bottom sheet are inserted in the same direction and are located at the opening of the bag.

[0020] The beneficial effects of the present invention are as follows:

[0021] 1. The present invention provides a one-out-two bag-making process, which improves production efficiency. At the same time, printing adopts one-time molding printing, which avoids the color difference problem of the front and back bag surfaces. In addition, the front bag surface and the back bag surface use the same piece of fabric to ensure consistent physical and mechanical properties, and solves the problem of inconsistent fabric deformation and thus affecting pattern inconsistency due to the influence of environment and process during production.

[0022] 2. The present invention uses a photoelectric eye to identify information, which can ensure that the information position on each bag insert is accurate and consistent, effectively solving the problem in the existing bag-making process that the information on the insert cannot be centered due to the deviation of the insert sheet. At the same time, the punching positions on the double insert sheets are accurate and consistent, which improves the heat sealing effect of the bag, thereby improving the quality of the bag and enhancing the competitiveness of the product in the market. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying any creative work, other drawings obtained based on these drawings still fall within the scope of the present invention.

[0024] Figure 1 is a flow chart of the process of the present invention;

[0025] Figure 2 A schematic diagram of the device of the present invention;

[0026] Figure 3 Schematic diagram of the changes in product morphology in each step of the present invention;

[0027] Figure 4 This is a schematic diagram of the product form in step S4 of the present invention;

[0028] Figure 5 Schematic diagram of the product form in step S5 of the present invention;

[0029] Figure 6 Schematic diagram of the product form in step S6 of the present invention;

[0030] Figure 7 Schematic diagram of the bottom separation of the finished bag of the present invention;

[0031] Figure 8 Schematic diagram of the finished bag of the present invention. DETAILED DESCRIPTION

[0032] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0033] In the description of this application, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting this application. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0034] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0035] In the description of this application, it should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for the purpose of distinguishing two non-identical entities with the same name or non-identical parameters. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. Subsequent embodiments will not explain this one by one.

[0036] like Figures 1 to 8 As shown, an embodiment of the present invention is provided:

[0037] A manufacturing process for a bottom-inserted stand-up bag, comprising a double-inserted bottom sheet 1 and a front-back bag sheet 2, wherein the double-inserted bottom sheet 1 comprises two side-by-side inserted bottom sheets 11, wherein the inserted bottom sheet 11 comprises a plurality of inserted bottom sheets 111 arranged in sequence, wherein the front-back bag sheet 2 comprises a double front bag sheet 21 and a double back bag sheet 22 arranged in sequence, wherein the double front bag sheet 21 comprises two side-by-side front bag sheets 211, wherein the double back bag sheet 22 comprises two side-by-side back bag sheets 221, wherein the front bag sheet 211 comprises a plurality of front bag sheets 2111 arranged in sequence, wherein the back bag sheet 221 comprises a plurality of back bag sheets 221 arranged in sequence. 211. The information on the double-inserted bottom sheet 1 is printed in one-time molding, and the information on the front and rear bag sheets 2 is printed in one-time molding, wherein the sheets are strip-shaped sheets, which avoids the color difference problem of the front and rear bag sheets of the self-supporting bag and the color difference problem of different self-supporting bag insert bottom sheets. Moreover, the front bag surface and the back bag surface use the same piece of fabric to ensure consistent physical and mechanical properties, and solve the problem of inconsistent fabric deformation and thus inconsistent patterns due to the influence of the environment and process during production. At the same time, one-out-two can be achieved, thereby improving production efficiency. In addition, only two feeding mechanisms need to be set corresponding to the front and rear bag sheets and the double-inserted bottom sheet, which simplifies the process and equipment and reduces production costs. Specifically, the conventional one-out-two bag making process requires loading two front bag sheets 211, two back bag sheets 221, and two bottom insert sheets 11 separately, and then bending both sides of each bottom insert sheet 11 and inserting it between the corresponding front bag sheet 211 and back bag sheet 221, and then heat sealing and cutting them separately. If this process is adopted, the number of production equipment required will be large, the floor space occupied will be large, and the production cost will be increased.

[0038] The process provided by the present invention comprises the following steps:

[0039] S1: Input the front and rear bag sheets 2, install the rolled front and rear bag sheets 2 on the material rack and feed them in the form of the front and rear bag sheets 2 through the material roller;

[0040] S2: Cutting the front and rear bag sheets 2 into double front bag sheets 21 and double rear bag sheets 22, and conveying them separately;

[0041] S3: Input the double-inserted bottom sheet 1, install the rolled double-inserted bottom sheet 1 on the material rack, and feed it in the form of the double-inserted bottom sheet 1 through the material roller;

[0042] S4: Bending the double-inserted bottom sheet 1, bending both sides of the double-inserted bottom sheet 1 toward the center line of the conveying direction into an inserted bottom shape, and continuing to convey in this shape;

[0043] S5: Correction and punching of the double-inserted bottom sheet 1. The information on each inserting bottom sheet 111 is identified by a photoelectric eye, and the feeding speed of the double-inserted bottom sheet 1 is adjusted by controlling the traction roller through the servo motor. At the same time, the specified position of the inserting bottom sheet 111 is punched during the conveying process; the punching position is located on the dividing line between adjacent bags on the double-bag sheet. Since the present bottom-inserted self-supporting bag needs to have holes punched on both sides of the insert bottom sheet 111 before heat sealing, so that the front and rear bag sheets can be heat-sealed through the holes, currently, information cannot be printed on the bottom of this type of bottom-inserted self-supporting bag, mainly because the position of the insert bottom sheet 111 is difficult to control and is prone to offset, resulting in inaccurate information position and failure to meet customer needs. Therefore, this problem is solved by tracking information with a photoelectric eye. Specifically, the photoelectric eye identifies information based on the different shades of information and the bottom band color, and combined with a servo motor and a traction roller, the information position on each bag insert bottom sheet can be accurate and consistent, effectively solving the problem of information offset and misalignment at the bottom of the bag in the existing bag-making process, while ensuring that the punching positions on the double-inserted bottom sheet are accurate and consistent, thereby improving the heat-sealing effect of the bag, thereby improving the quality of the bag and also improving the competitiveness of the product in the market.

[0044] S6: Insert the double-inserted bottom sheet 1, insert the double-inserted bottom sheet 1 in the insert-bottom form between the double front pocket sheet 21 and the double back pocket sheet 22 to form a double-bag body sheet, the double-bag body sheet includes two bag body sheets arranged in parallel, the bag body sheet includes a plurality of bag bodies arranged in sequence, the double-inserted bottom sheet 1 is arranged along the dividing line between the two bag body sheets on the double-bag body sheet; the bag body sheet can be cut into a plurality of bag bodies.

[0045] S7: Heat seal the bag, e.g. Figure 3 As shown, the bottom of the bag is heat-sealed on the double-bag sheet, and then the two sides of the bag are heat-sealed; in this way, the bags on the two double-bag sheets can be heat-sealed continuously, which simplifies the equipment and improves the heat sealing accuracy and heat sealing quality.

[0046] S8: Cutting into independent bags, cutting the double bag sheet into individual bags.

[0047] The steps S1, S2, S3, S4 and S5 are performed synchronously, which shortens the production cycle and improves production efficiency.

[0048] In step S1 and step S3, a storage rack 4 is used to store a certain length of front and rear bag sheets 2 and double-inserted bottom sheets 1. In this way, when changing materials, the material belt in the storage rack can allow the equipment to continue working for a certain period of time, ensuring continuous operation of the equipment and avoiding a large amount of energy consumption caused by starting and stopping the equipment.

[0049] The step S6 also includes: inserting a zipper, which is inserted in the same direction as the double-bottomed sheet 1 and located at the opening of the bag body. For different types of bottom-inserted self-supporting bags, the parts at the opening are installed first, and then heat-sealed to avoid affecting the installation after heat sealing.

[0050] The front bag piece 2111 and the back bag piece 2211 both include a heat-sealing layer and a printing layer. The heat-sealing layer can be made of PE material or an aluminum-plated layer. The printing layer is non-heat-sealable and is made of one or a combination of BOPP, CPP, PET and nylon.

[0051] The above disclosure is merely a preferred embodiment of the present invention and certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A process for manufacturing a bottom-inserted stand-up pouch, characterized in that: The invention comprises a double bottom insert sheet (1) and a front and rear pocket sheet (2), wherein the double bottom insert sheet (1) comprises two bottom insert sheets (11) arranged in parallel, the bottom insert sheet (11) comprises a plurality of bottom insert sheets (111) arranged in sequence, the front and rear pocket sheets (2) comprise a double front pocket sheet (21) and a double rear pocket sheet (22) arranged in parallel, the double front pocket sheet (21) comprises two front pocket sheets (211) arranged in parallel, the double rear pocket sheet (22) comprises two rear pocket sheets (221) arranged in parallel, the front pocket sheet (211) comprises a plurality of front pocket sheets (2111) arranged in sequence, the rear pocket sheet (221) comprises a plurality of rear pocket sheets (2211) arranged in sequence, the information on the double bottom insert sheet (1) is printed by one-shot molding, and the information on the front and rear pocket sheets (2) is printed by one-shot molding; The following steps are included: S1: inputting the front and rear bag sheets (2), installing the rolled front and rear bag sheets (2) on a material rack, and feeding the front and rear bag sheets (2) through a material roller; S2: cutting the front and rear bag sheets (2), cutting the front and rear bag sheets (2) into double front bag sheets (21) and double rear bag sheets (22), and transporting them separately; S3: inputting the double-inserted bottom sheet (1), installing the rolled double-inserted bottom sheet (1) on a material rack and feeding the double-inserted bottom sheet (1) through a material roller; S4: bending the double-inserted bottom sheet (1), bending both sides of the double-inserted bottom sheet (1) toward the center line of the conveying direction into an inserted bottom shape, and continuing to convey in this shape; S5: Correction and punching of the double-inserted bottom sheet (1), using a photoelectric eye to identify information on each inserting bottom sheet (111), and then using a servo motor to control the traction roller to adjust the feeding speed of the double-inserted bottom sheet (1), while punching holes at designated positions of the inserting bottom sheet (111) during the conveying process; S6: inserting the double-inserted bottom sheet (1), inserting the double-inserted bottom sheet (1) in the form of an inserted bottom between the double front pocket sheet (21) and the double back pocket sheet (22) to form a double-bag body sheet, the double-bag body sheet including two bag body sheets arranged in parallel, the bag body sheet including a plurality of bags arranged in sequence, and the double-inserted bottom sheet (1) being arranged along the dividing line between the two bag body sheets on the double-bag body sheet; S7: Heat-seal the bag body, heat-seal the bottom of the bag body on the double bag sheet, and then heat-seal the two sides of the bag body; S8: Cutting into independent bags, cutting the double bag sheet into individual bags.

2. The manufacturing process of a bottom-inserted stand-up pouch according to claim 1, characterized in that: Steps S1, S2, S3, S4 and S5 are performed synchronously.

3. The manufacturing process of a bottom-inserted stand-up pouch according to claim 1, characterized in that: In step S1 and step S3, a storage rack is used to store a certain length of front and rear bag sheets (2) and double-inserted bottom sheets (1).

4. The manufacturing process of a bottom-inserted stand-up pouch according to claim 1, characterized in that: The photoelectric eye identifies information based on the difference in color between the information and the base band.

5. The manufacturing process of a bottom-inserted stand-up pouch according to claim 1, characterized in that: The punching position is located on the separation line of adjacent bags on the double-bag sheet.

6. The manufacturing process of a bottom-inserted stand-up pouch according to claim 1, characterized in that: Step S6 also includes: inserting a zipper, wherein the zipper and the double-inserted bottom sheet (1) are inserted in the same direction and are located at the opening of the bag body.

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