Automatic bag making machine and process thereof

Abstract

The invention provides an automatic bag making machine and a process thereof, and relates to the technical field of paper bag manufacturing, the automatic bag making machine comprises a first conveying belt, a pre-folding guide strip, an unfolding guide strip, a front-end rotating rod and a rear-end rotating rod are sequentially arranged on a conveying path of the first conveying belt, a negative pressure nozzle is arranged on the front-end rotating rod, and a hook is arranged on the rear-end rotating rod; the first conveying belt is used for supporting a first side blocking petal and a second side blocking petal of the bag bottom to be vertical, and a plurality of first rolling wheels are further arranged on the first conveying belt and used for conducting orientation, deviation rectification and flattening on the pre-folded bag bottom to form creases. The starting point of the second conveying belt is located at the terminal point of the first conveying belt and is perpendicular to the first conveying belt, and a first steering mechanism, a bottom card discharging machine and a plurality of second rollers are sequentially arranged on the conveying path and used for rotating the paper bags, inserting the bottom cards, orienting and correcting deviation. According to the full-automatic paper bag bottom sealing machine, through high-automation design, automatic operation of the whole process of paper bag material feeding, pre-folding, bottom opening, bottom card placing, gluing, bottom sealing and the like is achieved, the production efficiency is remarkably improved, and manual intervention is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of paper bag manufacturing, in particular to an automatic bag making machine and a bag making process thereof which can automatically complete key links such as bag bottom folding, bottom card insertion, and bottom gluing and sealing. Background Art

[0002] In the packaging industry, paper bags are a common form of packaging and are widely used for packaging and carrying all kinds of goods. However, the traditional manual or semi-automatic bag-making process has many shortcomings, which seriously restricts the improvement of production efficiency and finished product quality. Specifically, these traditional processes rely too much on manual operation in key links such as bag bottom folding, bottom card insertion, and gluing and bottom sealing. The operation is not only cumbersome but also inefficient. Due to the uncontrollability of manual operation, the accuracy and consistency of these key links are difficult to guarantee, resulting in uneven quality of finished products, which seriously affects the market competitiveness of the products.

[0003] In the process of folding the bottom of the bag, manual operation often fails to form clear and even creases, which makes it difficult for the bottom of the bag to maintain a stable sealed state in subsequent operations. When inserting the bottom card, the bottom card may not be inserted smoothly or the position may shift after insertion because the bottom of the bag is not fully opened or the position is inaccurate, affecting the use of the paper bag. When gluing the bottom, manual gluing is difficult to ensure uniform distribution of glue, and the paper bag after the bottom is sealed may debond due to insufficient glue penetration, reducing the load-bearing capacity and service life of the paper bag.

[0004] In addition, the traditional manual or semi-automatic bag-making process also has material waste and safety hazards. Due to imprecise operation, a large amount of waste may be generated during the cutting and folding of paper bag materials, increasing production costs. At the same time, safety accidents may occur during manual operation due to improper operation or equipment failure, posing a threat to the health of operators.

[0005] Therefore, in order to solve the above problems, improve production efficiency, ensure the quality of finished products and reduce labor intensity and cost, it is particularly important to develop a bag making machine that can automatically complete key steps such as bag bottom folding, bottom card insertion, and gluing and bottom sealing. Summary of the invention

[0006] The present invention provides an automatic bag making machine and a process thereof. The automatic bag making machine and the process thereof realize the automation of the whole process from paper bag material loading, pre-folding, bottom opening, bottom card placement, gluing to bottom sealing through a highly automated design, which significantly improves production efficiency, reduces manual intervention, and thus reduces labor intensity and production costs.

[0007] The above technical objectives of the present invention are achieved through the following technical solutions: an automatic bag making machine, comprising:

[0008] The first conveyor belt has a pre-folding guide strip, an unfolding guide strip, a front rotating rod and a rear rotating rod in sequence on its conveying path. The front rotating rod is provided with a negative pressure nozzle, and the rear rotating rod is provided with a hook for supporting the first side baffle and the second side baffle of the bag bottom to stand upright. The first conveyor belt is also provided with a plurality of first rollers for orientation, deviation correction and flattening the pre-folded bag bottom to form a crease.

[0009] The second conveyor belt has a starting point located at the end point of the first conveyor belt and the two are perpendicular to each other. A first steering mechanism, a bottom card unloading machine and a plurality of second rollers are sequentially arranged on the conveying path for rotating paper bags, inserting bottom cards, orienting and correcting deviations;

[0010] The third conveyor belt has a starting point at the end point of the second conveyor belt and the two are perpendicular to each other. A second steering mechanism, a gluing machine, a bottom cover guide strip and a plurality of third rollers are sequentially arranged on the conveying path for rotating paper bags, gluing, guiding the bottom cover and orientation, correcting deviation and final shaping;

[0011] The finished product table is located at the end of the third conveyor belt and is used to store the finished paper bags;

[0012] The control box is electrically connected to the first conveyor belt, the second conveyor belt, the third conveyor belt and various components thereon.

[0013] In some embodiments, a guide plate is provided at the starting point of the first conveyor belt, and the guide plate is inclined toward the direction of the pre-folded guide strip.

[0014] In some embodiments, a plurality of first pressing columns are provided between the starting point of the first conveyor belt and the pre-folding guide strip, and a first pressing sheet parallel to and not in contact with the conveying surface of the first conveyor belt is provided at the bottom of each first pressing column.

[0015] In some embodiments, a plurality of second pressure columns are provided between the end point of the second conveyor belt and the bottom card unloading machine, and a second pressure plate parallel to the transmission surface of the second conveyor belt and not in contact with each other is provided at the bottom of each second pressure column.

[0016] In some embodiments, the shape and structure of the pre-folding guide strip and the bottom cover guide strip are exactly the same. Both are two symmetrically arranged stainless steel strips. The stainless steel strips act on the first folding flap and the second folding flap of the bottom of the bag. In the transmission direction of the paper bag, the stainless steel strips sequentially include a height increasing section, a horizontal extension section and a height decreasing section. The spacing between the horizontal extension section and the height decreasing section of the two stainless steel strips is smaller than the spacing between the height increasing sections.

[0017] In some embodiments, the unfolding guide strips are two symmetrically arranged stainless steel strips, the height of the two stainless steel strips is kept constant in the conveying direction of the paper bag, and the spacing between the two stainless steel strips is gradually increased.

[0018] In some embodiments, the first steering mechanism and the second steering mechanism are both an electrically controlled telescopic rod, and the movable end of the electrically controlled telescopic rod is vertically facing the transmission surface of the conveyor belt.

[0019] A bag making process comprises the following steps:

[0020] S1. Unloading: placing the paper bag material at the starting point of the first conveyor belt;

[0021] S2, pre-folding: the paper bag material passes through the pre-folding guide strip to guide the bag bottom to fold into a bottom-sealed state;

[0022] S3, first flattening: After the pre-folded bag bottom, it enters the unfolding guide bar, unfolds and flattens the bag bottom;

[0023] S4, bottom opening: the front rotating rod and the rear rotating rod work together to support the first side baffle and the second side baffle of the bag bottom to stand upright;

[0024] S5, placing the bottom card: after the paper bag rotates, the bottom card unloading machine inserts the bottom card into the unfolded bag bottom;

[0025] S6, second flattening: the bag bottom with the bottom card is flattened and oriented by rollers to keep it in an unfolded state;

[0026] S7, Gluing: The glue coating machine performs glue coating operation on the unfolded and flattened bag bottom;

[0027] S8, bottom cover: the bag bottom after gluing is refolded into the bottom cover state under the guidance of the bottom cover guide strip;

[0028] S9, discharging: After the back sealing operation is completed, the paper bags enter the finished product table for storage.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The present invention realizes a fully automated process from unloading paper bag materials to storing finished products by integrating the first, second, and third conveyor belts and a plurality of special mechanisms, thereby significantly improving production efficiency and reducing manual intervention and labor intensity.

[0031] The control box serves as the control center of the entire system. By electrically connecting each conveyor belt and components, it achieves precise control and coordination of the entire production process, ensures the stability and consistency of the quality of the finished paper bags, and reduces the defective rate.

[0032] Innovative designs such as pre-folding guide strips, unfolding guide strips, front rotating rods and rear rotating rods not only simplify the bag making process, but also improve the convenience and accuracy of operation. For example, the unfolding guide strip ensures that the bottom of the bag is flat, laying the foundation for subsequent operations, and the cooperation of the front rotating rod and the rear rotating rod can easily realize the complete opening of the bag bottom.

[0033] The multifunctional rollers installed on each conveyor belt not only facilitate the smooth transmission of paper bags, but also provide full-process orientation and deviation correction to ensure that the paper bags are accurately positioned during transmission, thus improving the accuracy and efficiency of bag making.

[0034] The design of the first steering mechanism and the second steering mechanism enables the paper bags to be flexibly turned between different conveyor belts and ensures that the bottom of the bag is accurately aligned with the bottom card feeder and the glue coating machine, thereby improving the accuracy and efficiency of bag making. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the overall structure of the bag making machine of the present invention;

[0036] Figure 2 This is a schematic diagram of the distribution of components on the first conveyor belt of the bag making machine of the present invention;

[0037] Figure 3 This is a schematic diagram of the distribution of components on the second conveyor belt of the bag making machine of the present invention;

[0038] Figure 4 This is a schematic diagram of the distribution of components on the third conveyor belt of the bag making machine of the present invention;

[0039] Figure 5 It is a schematic diagram of the product morphology transformation of the process of the present invention;

[0040] Figure 6 This is a schematic diagram of the product of the process of the present invention when the bottom is not sealed;

[0041] Figure 7 This is a schematic diagram of the shape of the product of the process of the present invention after back cover.

[0042] In the figure:

[0043] 1. First conveyor belt; 101. Guide plate; 102. First pressure column; 103. First pressure sheet; 104. Pre-folding guide strip; 105. First roller; 106. Unfolding guide strip; 107. Front rotating rod; 108. Negative pressure nozzle; 109. Rear rotating rod; 110. Hook;

[0044] 2. Second conveyor belt; 201. First steering mechanism; 202. Bottom card unloading machine; 203. Second roller; 204. Second pressing column; 205. Second pressing sheet;

[0045] 3. The third conveyor belt; 301. The second steering mechanism; 302. The glue coating machine; 303. The third roller; 304. The bottom cover guide strip;

[0046] 4. Finished product platform;

[0047] 5. Control box;

[0048] 100, bag body;

[0049] 200. Bag bottom; a. first side baffle; b. second side baffle; c. first folding flap; d. second folding flap; e. bottom card. DETAILED DESCRIPTION

[0050] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0051] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0052] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0053] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] like Figure 1-4 As shown, this embodiment provides an automatic bag making machine, comprising:

[0055] The first conveyor belt 1 has a conveying path which is provided with a pre-folding guide strip 104 for guiding the bag bottom 200 to fold into a bottom-sealed state, an unfolding guide strip 106 for guiding the bag bottom 200 in a folded state to unfold and flatten, and a front rotating rod 107 and a rear rotating rod 109 which are driven by a motor to rotate and turn in opposite directions, wherein the front rotating rod 107 is provided with a negative pressure nozzle 108 which is externally connected to an air suction device, and the rear rotating rod 109 is provided with a hook 110, and with the cooperation of the negative pressure nozzle 108 and the hook 110, the first side flap a and the The second side flap b is supported to stand upright, so that the bag bottom 200 is completely opened to form a square groove, so as to facilitate the placement of the bottom card e therein. A plurality of first rollers 105 are also provided on the first conveyor belt 1, some of which are arranged in sequence along the conveying path, and are used to orient and correct the bag body 100 of the paper bag throughout the entire process, so as to ensure that the position of the paper bag is accurate during the conveying process, and the other part is arranged between the pre-folding guide strip 104 and the unfolding guide strip 106, and is used to flatten the pre-folded bag bottom 200 to form a crease, so as to form a clear crease, which is convenient for subsequent folding;

[0056] On the first conveyor belt 1, the pre-folding guide strip 104 is responsible for guiding the bag bottom 200 to fold into a bottom-sealed state in a predetermined manner, laying the foundation for subsequent operations; the unfolding guide strip 106 is responsible for unfolding and flattening the folded bag bottom 200, so that the bag bottom 200 is in a relatively flat state, which is convenient for the subsequent cooperation of the negative pressure nozzle 108 and the hook 110 to support the first side baffle a and the second side baffle b of the bag bottom 200 to stand upright, thereby presenting a square groove shape, creating favorable conditions for the insertion of the bottom card e. If the unfolding guide strip 106 is not used for this step, the negative pressure nozzle 108 and the hook 110 may encounter greater resistance when directly acting on the bag bottom 200 in the bottom-sealed state, and may even tear the bag bottom 200, affecting the subsequent production process. The fine design of the strip 106 can ensure that the bag bottom 200 is in a flat and easy-to-operate state before entering the subsequent process, so that the negative pressure nozzle 108 and the hook 110 can more easily and accurately support the first side baffle a and the second side baffle b of the bag bottom 200 to stand upright, laying a solid foundation for the smooth insertion of the bottom card e; the front rotating rod 107 and the rear rotating rod 109 are driven by a motor to rotate in opposite directions. The front rotating rod 107 is equipped with a negative pressure nozzle 108, which is connected to the suction device to generate negative pressure to fix one side baffle of the bag bottom 200 when the paper bag passes under it, and the rear rotating rod 109 is provided with a hook 110 for hooking the other side baffle. The two work together to support the first side baffle a and the second side baffle b of the bag bottom 200 to stand upright, so that the bag bottom 200 is fully opened;

[0057] The second conveyor belt 2 has a starting point at the end point of the first conveyor belt 1, and the two are perpendicular to each other. The transmission path of the second conveyor belt 2 is provided with a first steering mechanism 201 for rotating the paper bag clockwise by ninety degrees, a bottom card e feeder 202 for feeding the bottom card e into the bottom 200 of the bag in the open bottom state, and a plurality of second rollers 203, wherein a part of the second rollers 203 are arranged in sequence along the transmission path for orienting and correcting the bag body 100 of the paper bag throughout the whole process, and another part is provided between the bottom card e feeder 202 and the end point of the second conveyor belt 2 for pressing the bag bottom 200 equipped with the bottom card e to unfold and flatten it so as to facilitate gluing;

[0058] On the second conveyor belt 2, when the first conveyor belt 1 transfers the paper bag to the second conveyor belt 2, the first steering mechanism 201 is responsible for rotating the paper bag ninety degrees clockwise. This step occurs precisely at the starting point of the second conveyor belt 2. Through this rotation, it is ensured that the bag bottom 200 of the paper bag can be accurately aligned and pass through the discharge end of the bottom card e feeder 202 during the subsequent transmission process. The precise rotation of the first steering mechanism 201 ensures that the bottom card e can be accurately inserted into the bag bottom 200 of the paper bag; the bottom card e feeder 202 is responsible for accurately inserting the bottom card e into the unfolded bag bottom 200;

[0059] The third conveyor belt 3 has a starting point at the end point of the second conveyor belt 2, and the two are perpendicular to each other. The transmission path of the third conveyor belt 3 is provided with a second steering mechanism 301 for rotating the paper bag clockwise by ninety degrees, a glue coating machine 302 for coating glue on the bag bottom 200 in an unfolded and flattened state, a bottom cover guide strip 304 for guiding the glued bag bottom 200 to be folded again into a bottom cover state according to the pre-folded crease, and a plurality of third rollers 303. A part of the third rollers 303 are arranged in sequence along the transmission path for orienting and correcting the bag body 100 of the paper bag throughout the whole process, and another part is arranged between the bottom cover guide strip 304 and the end point of the third conveyor belt 3 for flattening the bag bottom 200 after gluing and bottom sealing to complete the final shaping;

[0060] On the third conveyor belt 3, when the second conveyor belt 2 transfers the paper bag to the third conveyor belt 3, the second steering mechanism 301 rotates the paper bag ninety degrees clockwise again. The purpose of this step is to ensure that the bag bottom 200 of the paper bag can accurately pass through the glue coating machine 302 on the third conveyor belt 3 so as to perform the gluing and bottom sealing operation; the glue coating machine 302 is responsible for gluing the unfolded and flattened bag bottom 200; the bottom sealing guide strip 304 is responsible for guiding the glued bag bottom 200 to be refolded into a bottom sealing state according to the pre-folded crease.

[0061] A finished product table 4, which is arranged at the end point of the third conveyor belt 3 and is used to store finished paper bags;

[0062] The control box 5 is electrically connected to the first conveyor belt 1, the second conveyor belt 2, the third conveyor belt 3 and the components thereon. As the control center of the entire automatic bag making machine, it realizes precise control and coordination of the entire production process by electrically connecting to the first, second and third conveyor belts 3 and the components thereon.

[0063] The automatic bag making machine of the present invention significantly improves production efficiency and reduces labor intensity and cost through a highly automated design. At the same time, precise mechanical control and sensor monitoring ensure the stability and consistency of the quality of the finished product.

[0064] In some embodiments, Figure 2 As shown, a guide plate 101 is provided at the starting point of the first conveyor belt 1, and the guide plate 101 is inclined toward the pre-folding guide strip 104. The setting of the guide plate 101 ensures that the paper bag material can be smoothly guided to the pre-folding guide strip 104 when entering the first conveyor belt 1. Since the guide plate 101 is inclined toward the pre-folding guide strip 104, the paper bag material can naturally slide toward the pre-folding guide strip 104 under the dual effects of gravity and the guide plate 101, thereby avoiding deviation and instability that may occur during manual placement, and improving the accuracy and efficiency of paper bag material feeding.

[0065] In some embodiments, Figure 2 As shown, a plurality of first pressure columns 102 are provided between the starting point of the first conveyor belt 1 and the pre-folding guide strip 104, and a first pressing plate 103 is provided at the bottom of each first pressure column 102, which is parallel to the conveying surface of the first conveyor belt and does not contact each other. The combined structure of the first pressure column 102 and the first pressing plate 103 can effectively perform preliminary positioning and stabilization on the paper bag material entering the first conveyor belt 1. In the process of the paper bag material entering the first conveyor belt 1 from the outside and moving toward the pre-folding guide strip 104, it may slightly deviate or shake due to external factors such as airflow and vibration. At this time, the first pressure column 102 and the first pressing plate 103 at the bottom thereof can play a role similar to a "guide rail", slightly blocking and guiding the paper bag material, ensuring that it can smoothly and accurately enter the pre-folding guide strip 104, thereby improving the stability and accuracy of the paper bag material in the feeding stage.

[0066] In some embodiments, Figure 3As shown, a plurality of second pressing columns 204 are provided between the end of the second conveyor belt 2 and the bottom card e feeder 202, and a second pressing sheet 205 is provided at the bottom of each second pressing column 204, which is parallel to the transmission surface of the second conveyor belt and does not contact each other. When the paper bag with the bottom card e comes out of the bottom card e feeder 202 and is ready to pass through the end of the second conveyor belt 2, the combination structure of the second pressing column 204 and the second pressing sheet 205 plays a key positioning and guiding role. After the bottom card e is inserted, the bottom 200 of the paper bag may be deformed or warped to a certain extent due to the thickness of the bottom card e or the force during the insertion process, which may affect the stability and accuracy of the paper bag in the subsequent process. At this time, the second pressing column 204 and the second pressing sheet 205 at the bottom thereof can effectively block and guide the paper bag slightly, ensuring that it can pass through the end of the second conveyor belt 2 smoothly and accurately in a flattened posture and enter the subsequent process.

[0067] In some embodiments, Figure 2 and 4As shown, the shape and structure of the pre-folding guide strip 104 and the bottom cover guide strip 304 are completely consistent, and both are two symmetrically arranged stainless steel strips. The two stainless steel strips are sequentially designed with a height increasing section, a horizontal extension section, and a height decreasing section in the conveying direction of the paper bag, and the objects of action are the first folding flap c and the second folding flap d of the bag bottom 200. For the pre-folding guide strip 104, during the pre-folding process, the paper bag first contacts the height increasing section of the pre-folding guide strip 104. This section is designed to make the stainless steel strip gradually rise, and produce a slight lifting effect on the bag bottom 200 of the paper bag, guiding the first folding flap c and the second folding flap d to begin to fold inward, laying the foundation for the subsequent steps. Subsequently, the stainless steel strip enters the horizontal extension section and maintains a constant height. However, it is important that at this stage, the distance between the two stainless steel strips gradually decreases. This design cleverly realizes the folding of the first folding flap c and the second folding flap d, so that they can fit together more closely to form a stable bottom cover state. Finally, the height of the stainless steel strip gradually decreases to form a height decreasing section. This stage produces a slight pressure on the folded and bonded flaps, further stabilizing the bottom sealing state and ensuring the stability and accuracy of the paper bag in subsequent operations. For the paper bag, before the paper bag enters the pre-folding guide strip 104, it is in a relatively flat state, and there are no creases on its first folding flap c and second folding flap d. However, as the paper bag contacts the height increasing section of the pre-folding guide strip 104, the first folding flap c and second folding flap d of the bag bottom 200 begin to gradually fold inward. When the paper bag moves to the horizontal extension section, the spacing of the stainless steel bar gradually decreases. This change allows the first folding flap c and the second folding flap d to fold in half under the guidance of the stainless steel bar. The folded flaps continue to move under the stable support of the stainless steel bar, forming clear creases and ensuring the accuracy and consistency of the folding. Finally, under the action of the height decreasing section, the folded and bonded flaps are further compressed, thereby stabilizing the bottom sealing state. At this point, the paper bag has completed the initial transition from a flat state to a bottom sealing state. The working principle and process of the bottom cover guide strip 304 are completely consistent with those of the pre-folding guide strip 104. After the paper bag passes through the glue coating machine 302, the main task of the bottom cover guide strip 304 is to guide the glued bag bottom 200 to be accurately folded again according to the crease formed during the pre-folding.

[0068] In some embodiments, Figure 2As shown, the unfolding guide strips 106 are two symmetrically arranged stainless steel strips, which maintain a constant height in the conveying direction of the paper bag and gradually increase the spacing between them. After the paper bag passes through the pre-folding guide strips 104, the first folding flap c and the second folding flap d of the bag bottom 200 have formed preliminary folds and are attached together. However, in order to facilitate the subsequent operation of the negative pressure nozzle 108 and the hook 110 to open the bag bottom 200, the folded bag bottom 200 needs to be unfolded and flattened again. At this time, the unfolding guide strips 106 play a key role. The two symmetrically arranged stainless steel strips maintain a constant height in the conveying direction but the spacing gradually increases, ensuring that the bag bottom 200 can be smoothly and evenly unfolded from the folded state to the flat state. In this way, the bag bottom 200 is in a relatively flat state, which is convenient for the subsequent cooperation of the negative pressure nozzle 108 and the hook 110 to support the first side baffle a and the second side baffle b of the bag bottom 200 to stand upright, thereby presenting a square groove shape, creating favorable conditions for the insertion of the bottom card e and the subsequent gluing and bottom sealing operations.

[0069] In some embodiments, Figure 3-4 As shown, the first steering mechanism 201 and the second steering mechanism 301 are both an electrically controlled telescopic rod, and the movable end of the electrically controlled telescopic rod is vertically directed toward the transmission surface of the conveyor belt. When steering is required, the movable end of the electrically controlled telescopic rod is quickly extended to press a corner of the paper bag against the conveyor belt. As the conveyor belt continues to operate, the paper bag rotates with the fixed corner as the center of the circle, thereby achieving smooth steering of the paper bag.

[0070] like Figure 5-7 As shown, this embodiment also provides a bag making process, which is based on any of the above-mentioned automatic bag making machines and includes the following steps:

[0071] S1, unloading: placing the paper bag material at the starting point of the first conveyor belt 1, and the paper bag material starts the automatic bag making process under the drive of the first conveyor belt 1;

[0072] S2, pre-folding: the paper bag material passes through the pre-folding guide strip 104 under the transmission of the first conveyor belt 1; the pre-folding guide strip 104 guides the bag bottom 200 to be folded into a bottom-sealed state in a predetermined manner through its special design, laying a foundation for the subsequent bottom opening and bottom card e insertion operations; this step ensures the accuracy and consistency of the folding of the bag bottom 200;

[0073] S3, first flattening: the pre-folded bag bottom 200 enters the unfolding guide bar 106 under the continuous transmission of the first conveyor belt 1; the unfolding guide bar 106 unfolds and flattens the folded bag bottom 200 to make it in a relatively flat state; this step facilitates the subsequent bottom opening operation and ensures the smooth progress of the bottom opening process;

[0074] S4, bottom opening: at the end of the first conveyor belt 1, the front rotating rod 107 and the rear rotating rod 109 are driven by the motor to rotate in opposite directions; the negative pressure nozzle 108 on the front rotating rod 107 is connected to the vacuum device to generate negative pressure to fix the flap on one side of the bag bottom 200; the hook 110 on the rear rotating rod 109 hooks the flap on the other side; the two work together to support the first side flap a and the second side flap b of the bag bottom 200 to stand upright, so that the bag bottom 200 is completely opened to a square groove shape, creating favorable conditions for the insertion of the bottom card e;

[0075] S5, placing the bottom card e: after the paper bag is rotated by the first steering mechanism 201, it enters the second conveyor belt 2; on the second conveyor belt 2, the bottom card e feeder 202 accurately inserts the bottom card e into the unfolded bag bottom 200; this step ensures the accuracy and stability of the insertion of the bottom card e, and improves the quality of the finished product;

[0076] S6, second flattening: the bag bottom 200 equipped with the bottom card e is continuously conveyed by the second conveyor belt 2, and the rollers on the conveyor belt flatten and orient the bag bottom 200, so as to ensure that the bag bottom 200 remains unfolded and flattened, which facilitates the subsequent gluing operation;

[0077] S7, gluing: After the paper bag is rotated by the second steering mechanism 301, it enters the third conveyor belt 3; on the third conveyor belt 3, the gluing machine 302 performs gluing operation on the unfolded and flattened bag bottom 200; this step ensures the uniformity and accuracy of gluing, and improves the quality and strength of the bottom cover;

[0078] S8, bottom sealing: the bag bottom 200 after gluing is refolded into a bottom sealing state according to the pre-folding crease under the guidance of the bottom sealing guide strip 304; this step ensures the accuracy and consistency of the bottom sealing, making the finished paper bag more beautiful and practical;

[0079] S9, discharging: After the bottom sealing operation is completed, the paper bags are driven by the third conveyor belt 3 to enter the finished product material table 4 for storage; this step completes the entire bag making process and realizes the full automation operation from the pretreatment of the bag bottom 200 to the collection of the finished product.

[0080] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. An automatic bag making machine, characterized in that: include: A first conveyor belt (1), on whose conveying path a pre-folding guide strip (104), an unfolding guide strip (106), a front rotating rod (107) and a rear rotating rod (109) are sequentially arranged, the front rotating rod (107) is provided with a negative pressure nozzle (108), the rear rotating rod (109) is provided with a hook (110) for supporting the first side baffle (a) and the second side baffle (b) of the bag bottom (200) to stand upright, and the first conveyor belt (1) is also provided with a plurality of first rollers (105) for orienting, correcting deviation and flattening the pre-folded bag bottom (200) to form a fold. The second conveyor belt (2) has a starting point located at the end point of the first conveyor belt (1) and the two are perpendicular to each other, and a first steering mechanism (201), a bottom card unloading machine (202) and a plurality of second rollers (203) are sequentially provided on the conveying path for rotating paper bags, inserting bottom cards, and orienting and correcting deviations; The third conveyor belt (3) has a starting point located at the end point of the second conveyor belt (2) and the two are perpendicular to each other, and a second steering mechanism (301), a glue coating machine (302), a bottom cover guide strip (304) and a plurality of third rollers (303) are sequentially arranged on the conveying path, and are used for rotating paper bags, gluing, guiding the bottom cover and orientation, correcting deviation and final shaping; A finished product material platform (4), arranged at the end point of the third conveyor belt (3), for storing finished paper bags; The control box (5) is electrically connected to the first conveyor belt (1), the second conveyor belt (2), the third conveyor belt (3) and various components thereon.

2. The automatic bag making machine according to claim 1, characterized in that: A guide plate (101) is provided at the starting point of the first conveyor belt (1), and the guide plate (101) is inclined in the direction of the pre-folding guide strip (104).

3. The automatic bag making machine according to claim 1, characterized in that: A plurality of first pressing columns (102) are arranged between the starting point of the first conveyor belt (1) and the pre-folding guide strip (104), and a first pressing sheet (103) parallel to and not in contact with the conveying surface of the first conveyor belt is arranged at the bottom of each first pressing column (102).

4. The automatic bag making machine according to claim 1, characterized in that: A plurality of second pressure columns (204) are provided between the end point of the second conveyor belt (2) and the bottom card unloading machine (202), and a second pressure sheet (205) parallel to and not in contact with the transmission surface of the second conveyor belt is provided at the bottom of each second pressure column (204).

5. The automatic bag making machine according to claim 1, characterized in that: The pre-folding guide strip (104) and the bottom cover guide strip (304) have completely identical shapes and structures, and are both two symmetrically arranged stainless steel strips, which act on the first folding flap (c) and the second folding flap (d) of the bag bottom (200). In the conveying direction of the paper bag, the stainless steel strips sequentially include a height increasing section, a horizontal extension section, and a height decreasing section, and the spacing between the horizontal extension sections and the height decreasing sections of the two stainless steel strips is smaller than the spacing between the height increasing sections.

6. The automatic bag making machine according to claim 1, characterized in that: The unfolding guide bars (106) are two symmetrically arranged stainless steel bars, the height of the two stainless steel bars remains unchanged in the conveying direction of the paper bag, and the spacing between them gradually increases.

7. The automatic bag making machine according to claim 1, characterized in that: The first steering mechanism (201) and the second steering mechanism (301) are both electrically controlled telescopic rods, and the movable ends of the electrically controlled telescopic rods are vertically directed toward the transmission surface of the conveyor belt.

8. A bag making process, the process being based on the automatic bag making machine according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1, unloading: placing the paper bag material at the starting point of the first conveyor belt (1); S2, pre-folding: the paper bag material passes through the pre-folding guide strip (104), guiding the bag bottom (200) to fold into a bottom-sealed state; S3, first flattening: the pre-folded bag bottom (200) enters the unfolding guide bar (106), and the bag bottom (200) is unfolded and flattened; S4, opening the bottom: the front rotating rod (107) and the rear rotating rod (109) work together to support the first side retaining flap (a) and the second side retaining flap (b) of the bag bottom (200) to stand upright; S5, placing the bottom card: after the paper bag rotates, the bottom card blanking machine (202) inserts the bottom card into the unfolded bag bottom (200); S6, second flattening: the bag bottom (200) equipped with the bottom card is kept in an unfolded state by roller flattening and orientation; S7, gluing: the gluing machine (302) performs gluing operation on the unfolded and flattened bag bottom (200); S8, bottom sealing: the bag bottom (200) after being glued is folded back into a bottom sealing state under the guidance of the bottom sealing guide strip (304); S9, discharging: After the back sealing operation is completed, the paper bags enter the finished product table (4) for storage.

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