Stack positioning mechanism of bag making machine and working method thereof

Abstract

The application discloses a bag making machine stacking positioning mechanism and a working method thereof. The bag making machine stacking positioning mechanism is arranged on a rack of a bag making machine, located at the rear of a cold cutting assembly or a heat sealing cutting mechanism, and comprises a pressing assembly, a lower pressing assembly and a pressing assembly. The pressing assembly comprises a bottom plate, an upper pressing plate and a pressing driving assembly. The pressing driving assembly drives the upper pressing plate to vertically reciprocate up and down and continuously and elastically press the plastic bags stacked on the horizontally arranged bottom plate. The lower pressing assembly is arranged above the front side of the upper pressing plate. The executing part of the lower pressing assembly reciprocates vertically up and down to press the tail of the plastic bag downward on the front side wall of the bottom plate. The pressing assembly is arranged below the front side of the bottom plate. The executing part of the pressing assembly presses the tail of the plastic bag on the front side wall of the bottom plate. The application adopts a tail pressing mode to stack the plastic bags, avoiding perforating the plastic bags.

Description

Technical Field

[0001] This invention relates to the field of bag making machine technology, and in particular to a stacking and positioning mechanism for a bag making machine and its working method. Background Technology

[0002] Plastic bags are an indispensable item in people's daily lives. People use plastic bags to store and hold things for convenience in carrying or storing them. With the development of the petrochemical industry and the upgrading of bag-making equipment, people have gradually developed a variety of plastic bags that are not only lightweight and thin but also have a certain degree of strength and toughness, thus greatly increasing the convenience for people to use.

[0003] In the production of non-roll bags such as vest bags, after the bag-making machine completes the heat sealing and cooling of the plastic bags, it needs to gradually stack and collect the bags behind the cooling blade. This process is commonly referred to in the industry as bag collection. Existing bag collection mechanisms often use telescopic cylinders to drive bag collection needles through the surface of the plastic bags, stacking them one by one, thus preventing messy stacking during air blowing and conveying. However, this results in the bag collection needles puncturing holes in the plastic bags, affecting their usability. For vest bags, the bag collection needles can be placed at the cut-off section, but for non-cut-off individual bags, the bag collection needles need to be placed at the edge, which often requires increasing the width of the edge and increasing the wasted area of ​​plastic film.

[0004] To overcome the above problems, a stacking and positioning mechanism for a bag-making machine and its working method are needed. Summary of the Invention

[0005] The purpose of this invention is to provide a stacking and positioning mechanism for a bag making machine and its working method, which uses a finger clamping tail pressing method to stack plastic bags, avoiding perforation of the plastic bags.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] This invention discloses a stacking and positioning mechanism for a bag-making machine, mounted on the machine frame and located behind the cold-cutting or heat-sealing mechanism. The mechanism includes a pressing component, a pressing component, and a pressing assembly. The pressing component comprises a base plate, an upper pressing plate, and a pressing drive component. The pressing drive component drives the upper pressing plate to reciprocate vertically, continuously and elastically pressing it against the plastic bags stacked on the horizontally positioned base plate. The pressing component is located above and in front of the upper pressing plate. Its actuator reciprocates vertically, pressing the tail of the plastic bag downwards against the front sidewall of the base plate. The pressing assembly is located below and in front of the base plate. Its actuator presses the tail of the plastic bag firmly against the front sidewall of the base plate.

[0008] Furthermore, the pressing component includes a gantry frame, a lower insert plate, and a pressing drive component. The inner side of the vertical beam of the gantry frame is vertically guided by a linear guide rail and a slider. The pressing drive component drives the gantry frame to move up and down reciprocally. The top of the lower insert plate is connected to the lower side of the crossbeam of the gantry frame. The downward stroke of the lower insert plate presses the tail of the plastic bag downward. A clearance slot is provided on the bottom edge of the lower insert plate. The actuator of the pressing component presses the tail of the plastic bag against the front side wall of the bottom plate at the clearance slot.

[0009] Furthermore, the lowering assembly also includes a main air pipe and an outlet branch pipe. The main air pipe is arranged along the crossbeam of the gantry frame, and multiple outlet branch pipes are arranged at equal intervals on the rear side wall of the lower insert plate. The outlet branch pipes are arranged vertically and their tops are connected to the main air pipe. The air inlet of the main air pipe is connected to a compressed air source.

[0010] Furthermore, the pressing assembly includes a pressing shaft, a drive swing arm, and a finger clamp component. The pressing shaft is supported by bearings at both ends on the side wall of the frame. The drive swing arm is located at one end of the pressing shaft and connected to the pressing drive component. A plurality of finger clamp components are spaced apart on the pressing shaft. The finger clamp components press the tail of the plastic bag against the front side wall of the base plate.

[0011] Furthermore, the finger clip component includes a mounting block, a finger clip, a torsion spring, a torsion spring shaft, an inner locking plate, and an outer locking cover. The mounting block is detachably mounted on the pressing shaft. A mounting groove is provided on one side of the mounting block. The torsion spring shaft is located at the bottom of the mounting groove. The bottom hole of the finger clip is sleeved on the torsion spring shaft. The torsion spring is sleeved on the outside of the torsion spring shaft and its two ends are fixed by the inner locking plate and the outer locking cover, respectively. The inner locking plate is fixed on the outer side wall of the finger clip.

[0012] Furthermore, a locking slot is provided at the bottom of the mounting hole that mates with the pressing shaft, and the mounting block is fixedly installed by tightening the locking slot with bolts.

[0013] Furthermore, the upper part of the finger clip is bent backward and a finger clip head is installed at the top, the finger clip head being made of plastic or rubber.

[0014] Furthermore, the inner locking plate is fixed to the outer wall of the finger clip by screws, and the outer locking cover is locked to the outer end of the torsion spring shaft by a radially arranged set screw.

[0015] Furthermore, it also includes an additional drive shaft, the two ends of which are supported by bearing seats on the side wall and the middle partition of the frame. The outer end of the additional drive shaft is connected to the drive unit via a pulley drive. A first eccentric wheel and a second eccentric wheel are mounted on the additional drive shaft. The first eccentric wheel transmits power to the pressing component, and the second eccentric wheel transmits power to the pressing component.

[0016] The present invention also discloses a working method of a stacking and positioning mechanism for a bag making machine, wherein multiple individual plastic bags are stacked using the stacking and positioning mechanism of the bag making machine described in any one of the above-mentioned methods.

[0017] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0018] This invention relates to a stacking and positioning mechanism for a bag-making machine. Through the arrangement of a pressing component and a pressing component, it achieves a series of actions including pressing down and clamping laterally, enabling efficient stacking of plastic bags without the use of a bag-collecting needle. Furthermore, this stacking and positioning mechanism employs a finger-clamping tail method to stack the plastic bags, preventing perforation.

[0019] Furthermore, the vertical reciprocating motion of the lower insert plate creates a downward insertion action, pressing the tail of the plastic bag downwards to prevent it from drifting upwards and ensuring that the actuator of the pressing component can firmly press the tail of the plastic bag. Pneumatic assistance, provided by the main air pipe and the outlet branch pipe, allows compressed air to be blown downwards when the lower insert plate moves, preventing the tail of the individual plastic bag being pressed by the pressing component from bending upwards and causing uneven stacking. Multiple finger clamp components are spaced apart on the pressing shaft, and the swing of the pressing shaft enables synchronous clamping and releasing actions of these components. The finger clamp components, composed of a mounting block, finger clamps, and torsion springs, allow the finger clamps to elastically deform relative to the mounting block, adapting to increasingly thick stacked plastic bags. Locking slots, combined with locking bolts, allow for flexible movement of the finger clamp components, adapting to different plastic bag shapes. The finger clamp heads effectively protect the plastic bag film that needs to be pressed, preventing it from being torn. By simultaneously driving the pressing component and the flicking component through the same additional drive shaft, the backward movement relationship between the lower insert plate and the finger clamp component can be strictly guaranteed, avoiding any disorder in the sequence of actions. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 This is a three-dimensional structural diagram of the stacking and positioning mechanism of the bag making machine of the present invention;

[0022] Figure 2 This is a front view schematic diagram of the stacking and positioning mechanism of the bag making machine of the present invention;

[0023] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of the AA section;

[0024] Figure 4 This is a three-dimensional structural diagram of the present invention after removing the right side panel of the frame;

[0025] Figure 5 for Figure 4 The right view in the current state;

[0026] Figure 6 This is a three-dimensional structural diagram of the pressing component of the present invention;

[0027] Figure 7 This is a three-dimensional structural diagram of the pressing component of the present invention;

[0028] Figure 8 This is an enlarged structural diagram of the finger clamp mounting part of the present invention.

[0029] Explanation of reference numerals in the attached drawings: 1. Frame; 101. Horizontal support base; 2. Conveying assembly; 201. Air blowing pipe; 3. Cold cutting assembly; 301. Moving knife; 302. Stationary knife; 303. Cold cutting drive assembly; 4. Pressing assembly; 401. Base plate; 402. Upper pressure plate; 403. Pressing drive assembly; 5. Lower pressing assembly; 501. Lower insert plate; 502. Main air pipe; 503. Air outlet branch pipe; 504. Clearance slot; 505. Downward drive assembly; 6. Pressing assembly; 601. Pressing shaft; 602. Drive swing arm; 603. Mounting block; 6031. Locking slot; 604. Finger clip; 6041. Finger clip head; 605. Torsion spring; 606. Torsion spring shaft; 607. Inner locking plate; 608. Outer locking cover; 7. Additional drive shaft; 701. First eccentric wheel; 702. Second eccentric wheel. Detailed Implementation

[0030] The core of this invention is to provide a stacking and positioning mechanism for a bag making machine and its working method, which uses a finger clamping tail pressing method to stack plastic bags, avoiding perforation of the plastic bags.

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0033] Refer to the attached diagram. Figure 1 This is a three-dimensional structural diagram of the stacking and positioning mechanism of the bag making machine of the present invention; Figure 2 This is a front view schematic diagram of the stacking and positioning mechanism of the bag making machine of the present invention; Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of the AA section; Figure 4 This is a three-dimensional structural diagram of the present invention after removing the right side panel of the frame; Figure 5 for Figure 4 The right view in the current state; Figure 6 This is a three-dimensional structural diagram of the pressing component of the present invention; Figure 7 This is a three-dimensional structural diagram of the pressing component of the present invention; Figure 8 This is an enlarged structural diagram of the finger clamp mounting part of the present invention.

[0034] In one specific implementation, such as Figures 1-8 As shown, the stacking and positioning mechanism of the bag-making machine of the present invention is set on the frame 1 of the bag-making machine, located behind the cold-cutting assembly 3 or the heat-sealing and cutting mechanism, and its function is to stack single plastic bags. In this embodiment, the cold-cutting assembly 3 is located behind the conveying assembly 2. The conveying assembly 2 includes two pairs of conveying rollers connected by conveyor belts. The upper and lower conveying rollers are provided with annular grooves for blowing air pipes 201. The blowing air pipes 201 blow air backward to assist in conveying the plastic bags through the cold-cutting assembly 3. The cold-cutting assembly 3 includes a moving blade 301, a stationary blade 302, and a cold-cutting drive assembly 303. The cold-cutting drive assembly 303 drives the moving blade 301 to move vertically up and down reciprocally, cooperating with the stationary blade 302 below to complete the cutting of the plastic bags. The stacking and positioning mechanism of the bag-making machine of the present invention includes a pressing assembly 4, a pressing component 5, and a pressing component 6. The pressing assembly 4 includes a base plate 401, an upper pressing plate 402, and a pressing drive assembly 403. The pressing drive assembly 403 drives the upper pressing plate 402 to move vertically up and down reciprocally, continuously and elastically pressing the plastic bags stacked on the horizontally positioned base plate 401. The base plate 401 has a U-shaped cross-section with the opening facing downwards. The pressing assembly 5 is located above the front side of the upper pressing plate 402. The actuator of the pressing assembly 5 moves vertically up and down reciprocally, pressing the tail of the plastic bag downwards onto the front side wall of the base plate 401. The pressing assembly 6 is located below the front side of the base plate 401. The actuator of the pressing assembly 6 presses the tail of the plastic bag firmly against the front side wall of the base plate 401.

[0035] In actual operation, the conveying assembly 2 first conveys a piece of plastic film the length of a single plastic bag backwards onto the bottom plate 401. The pressing drive assembly 403 drives the upper pressure plate 402 to press the plastic film on the bottom plate 401 tightly. The cold cutting drive assembly 303 drives the moving blade 301 to cut the plastic bag at the tail end, and the blowing air pipe 201 stops blowing air. The actuator of the pressing assembly 5 moves vertically downwards, pressing the cut plastic bag tail down flat onto the front side wall of the bottom plate 401. Then, the actuator of the pressing assembly 6 moves to press the plastic bag tail tightly onto the front side wall of the bottom plate 401. The cold cutting drive assembly 303 drives the moving blade 301 to reset upwards, the actuator of the pressing assembly 5 retracts upwards, and the pressing drive assembly 403 drives the upper pressure plate 402 to reset upwards, opening the feeding gap. The conveying assembly 2 then conveys the next piece of plastic film the length of a single plastic bag backwards onto the bottom plate 401 and stacks it on top of the previous plastic bag. Repeat the above steps to complete the stacking process.

[0036] By using the pressing component 5 and the pressing component 6, a series of actions such as pressing down and side clamping are achieved, enabling better stacking of plastic bags without the use of a bag collecting needle. The stacking and positioning mechanism of this bag-making machine uses a finger-clamping tail method to stack plastic bags, avoiding perforation of the plastic bags.

[0037] In one specific embodiment of the present invention, such as Figures 1-6 As shown, the pressing component 5 includes a gantry frame, a lower insert plate 501, and a pressing drive component 505. The gantry frame is mounted on the frame 1, and the frame 1 has a linear guide rail at the mounting position of the gantry frame. The inner side of the vertical beam of the gantry frame is connected to the linear guide rail via a slider for vertical guidance. The pressing drive component 505 drives the gantry frame to move up and down reciprocally. The top of the lower insert plate 501 is connected to the lower side of the crossbeam of the gantry frame. The downward stroke of the lower insert plate 501 presses the tail of the plastic bag downward. The bottom edge of the lower insert plate 501 has a clearance slot 504. The actuator of the pressing component 6 presses the tail of the plastic bag against the front side wall of the bottom plate component 401 at the clearance slot 504. The number of clearance slots 504 corresponds to the number of actuators of the pressing component 6.

[0038] Specifically, such as Figure 6 As shown, the lower assembly 5 also includes a main air pipe 502 and outlet branch pipes 503. The main air pipe 502 runs the length of the crossbeam of the gantry frame, and multiple outlet branch pipes 503 are arranged at equal intervals on the rear side wall of the lower insert plate 501, i.e., the outlet branch pipes 503 are located on the side facing the bottom plate 401. The outlet branch pipes 503 are vertically arranged and their tops are connected to the main air pipe 502. The bottoms of the outlet branch pipes 503 do not extend beyond the bottom edge of the lower insert plate 501, and the air inlet of the main air pipe 502 is connected to a compressed air source. The compressed air source can be a gas cylinder or an air pump, capable of providing clean and dry compressed air.

[0039] The vertical reciprocating motion of the lower insert plate 501 makes a downward insertion action, pressing the tail of the plastic bag downward to prevent the tail of the plastic bag from drifting upward, and ensuring that the actuator of the pressing component 6 can press the tail of the plastic bag tightly; the main air pipe 502 and the air outlet branch pipe 503 form a pneumatic assistance, which can blow compressed air when the lower insert plate 501 moves to blow the tail of the single plastic bag pressed by the pressing component 4 downward, preventing the tail of the plastic bag from bending upward and causing uneven stacking.

[0040] In one specific embodiment of the present invention, such as Figures 1-5 , Figure 7 and Figure 8 As shown, the pressing assembly 6 includes a pressing shaft 601, a drive swing arm 602, and finger clamp components. The pressing shaft 601 is supported at both ends on the side wall of the frame 1 via bearing seats. The drive swing arm 602 is located at one end of the pressing shaft 601 and connected to the pressing drive component. Multiple finger clamp components are spaced apart and mounted on the pressing shaft 601, pressing the tail of the plastic bag against the front side wall of the bottom plate 401.

[0041] Specifically, such as Figure 7 and Figure 8 The finger clip component includes a locking block 603, a finger clip 604, a torsion spring 605, a torsion spring shaft 606, an inner locking plate 607, and an outer locking cover 608. The locking block 603 is detachably mounted on the pressing shaft 601. A mounting groove is provided on one side of the locking block 603, and the mounting groove is recessed into the side wall of the locking block 603. The torsion spring shaft 606 is located at the bottom of the mounting groove, and the bottom hole of the finger clip 604 is fitted onto the torsion spring shaft 606. The torsion spring 605 is fitted onto the outside of the torsion spring shaft 606, and its two ends are fixed by the inner locking plate 607 and the outer locking cover 608, respectively. The inner locking plate 607 is fixed to the outer side wall of the finger clip 604.

[0042] Specifically, such as Figure 8 As shown, a locking slot 6031 is provided at the bottom of the mounting hole that mates with the pressing shaft 601. Bolt through holes and threaded holes are provided on both sides of the locking slot 6031. The mounting block 603 is fixedly installed by pressing the locking slot 6031 with bolts.

[0043] Specifically, such as Figure 8 As shown, the upper part of the finger clip 604 is bent backward, resembling the shape of a bent finger. A finger clip head 6041 is installed at the top of the finger clip 604, which contacts the plastic bag film. The finger clip head 6041 is made of plastic or a rubber sleeve.

[0044] Specifically, such as Figure 8As shown, the inner locking plate 607 is fixed to the outer wall of the finger clip 604 by two screws, and the inner end of the torsion spring 605 is blocked by the screw cap at the bottom. The outer locking cover 608 is locked to the outer end of the torsion spring shaft 606 by a radially arranged set screw, and the outer locking cover 608 has an insertion hole for the outer end of the torsion spring 605.

[0045] Multiple finger clamp components are spaced apart and mounted on the pressing shaft 601. The swinging of the pressing shaft 601 enables the synchronous clamping and releasing of the multiple finger clamp components. The finger clamp component is composed of a mounting block 603, a finger clamp 604, and a torsion spring 605. The finger clamp 604 can elastically deform relative to the mounting block 603 to adapt to stacked plastic bags that gradually thicken. By opening a locking slit 6031 and cooperating with a locking bolt, the installation position of the finger clamp component can be flexibly moved to adapt to different plastic bag shapes. The finger clamp head 6041 effectively protects the plastic bag film that needs to be compressed, preventing it from being torn.

[0046] In one specific embodiment of the present invention, the stacking and positioning mechanism of the bag-making machine further includes an additional drive shaft 7. Both ends of the additional drive shaft 7 are supported on the side walls and intermediate partitions of the frame 1 via bearing seats. The outer end of the additional drive shaft 7 is connected to a drive unit via a pulley drive. The drive unit is a servo motor, driven by a synchronous pulley. A first eccentric wheel 701 and a second eccentric wheel 702 are mounted on the additional drive shaft 7, and bearing sleeves are provided on the outer sides of both eccentric wheels. The bearing sleeve of the first eccentric wheel 701 is connected to the inner swing arm of the intermediate shaft 5051 via a connecting rod. The outer swing arm of the intermediate shaft 5051 is connected to the pin on the outer wall of the vertical beam of the gantry frame via a connecting rod, thus transmitting power to the pressing assembly 5. The bearing sleeve of the second eccentric wheel 702 is connected to the drive swing arm 602 via a connecting rod, transmitting power to the pressing assembly 6.

[0047] By simultaneously driving the lower pressing component 5 and the pressing component 6 through the same additional drive shaft 7, the backward movement relationship between the lower insert plate 501 and the finger clip component can be strictly guaranteed, avoiding any disorder in the sequence of actions.

[0048] Obviously, the pressing component 5 and the toggle component 6 can also be implemented using separate linear motion drive elements such as cylinders or electric push rods, requiring electrical control logic sequence control to achieve the required actions. Similar simple replacement methods all fall within the protection scope of this invention.

[0049] The working process of the stacking and positioning mechanism of the bag making machine of the present invention is as follows: the conveying roller of the conveying component 2 rolls to convey and the blowing air pipe 201 blows air backward to assist in conveying the plastic bag film that has been heat-sealed. First, the plastic film of the length of a single plastic bag is conveyed backward between the bottom plate 401 and the upper pressure plate 402. Similar to conventional bag making machines, the pressing drive component 403 drives the upper pressure plate 402 to press the plastic film on the bottom plate 401, the cold cutting drive component 303 drives the moving blade 301 to make a cutting action at the tail of the plastic bag, and the blowing air pipe 201 stops blowing air. This invention does not use a bag-collecting needle. When the pressing component 5 is activated, the first eccentric wheel 701 drives the intermediate shaft 5051 to swing. The outer swing arm of the intermediate shaft 5051 pulls the vertical beam of the gantry frame vertically downward through a connecting rod, causing the lower insert plate 501 to descend. At the same time, compressed air is blown out from the air outlet branch pipe 503, pressing the tail of the plastic bag downward and flattening the cut tail of the plastic bag onto the front side wall of the bottom plate 401. Then, the pressing component 6 starts to operate. The bearing sleeve of the second eccentric wheel 702 drives the drive swing arm 602 through a connecting rod, and the drive swing arm 602 pulls the pressing shaft 601. The pressing shaft 601 swings forward, and the finger clip head 6041 of the finger clip 604 contacts the plastic bag film, pressing the tail of the plastic bag firmly onto the front side wall of the bottom plate 401. After being compressed here, the cold-cutting drive assembly 303 drives the moving blade 301 to reset upwards, the first eccentric wheel 701 drives the lower insert plate 501 to retract upwards, the air outlet branch pipe 503 stops blowing air, and the pressing drive assembly 403 drives the upper pressing plate 402 to reset upwards, opening the feeding gap. The conveying assembly 2 first conveys the plastic film of the next single plastic bag length backwards onto the bottom plate 401 and stacks it on top of the previous plastic bag. The above steps are repeated to complete the stacking.

[0050] The stacking and positioning mechanism of this invention's bag-making machine, through the setting of the pressing component 5 and the pressing component 6, realizes a series of actions such as pressing down and clamping side pressure, enabling better stacking of plastic bags without using bag collecting needles. This stacking and positioning mechanism uses a finger-clamping tail-pressing method to stack plastic bags, avoiding perforation. Furthermore, the vertical reciprocating motion of the lower insert plate 501 performs a pressing action, pressing down on the tail of the plastic bag to prevent it from drifting upwards, ensuring that the actuator of the pressing component 6 can firmly press the tail of the plastic bag. The main air pipe 502 and the outlet branch pipe 503 form a pneumatic auxiliary system, which blows compressed air downwards when the lower insert plate 501 moves, preventing the tail of the individual plastic bag pressed by the pressing component 4 from bending upwards and causing uneven stacking. Multiple finger clamp components are spaced apart and mounted on the pressing shaft 601. The swinging of the pressing shaft 601 enables the synchronous clamping and releasing of the multiple finger clamp components. The finger clamp component is composed of a mounting block 603, a finger clamp 604, and a torsion spring 605. The finger clamp 604 can elastically deform relative to the mounting block 603 to adapt to stacked plastic bags that gradually thicken. By opening a locking slot 6031 and cooperating with a locking bolt, the installation position of the finger clamp component can be flexibly moved to adapt to different plastic bag shapes. The finger clamp head 6041 effectively protects the plastic bag film that needs to be compressed, preventing it from being torn. By simultaneously driving the lower pressing component 5 and the pressing component 6 through the same additional drive shaft 7, the backward movement relationship between the lower insert plate 501 and the finger clamp components can be strictly guaranteed, avoiding any disorder in the action sequence.

[0051] This invention also discloses a working method for a stacking and positioning mechanism of a bag-making machine, which uses the stacking and positioning mechanism of the bag-making machine described in any of the above embodiments to stack multiple individual plastic bags. By pressing the downward-bent tail of the plastic bag with a finger clamp, the influence of the blowing air pipe 201 is avoided, achieving the effect of rapid stacking without damaging the plastic bags.

[0052] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0053] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A stacking and positioning mechanism for a bag-making machine, disposed on the frame (1) of the bag-making machine, located behind the cold-cutting assembly (3) or the heat-sealing and cutting mechanism, characterized in that, The device includes a pressing assembly (4), a pressing assembly (5), and a pressing assembly (6). The pressing assembly (4) includes a base plate (401), an upper pressing plate (402), and a pressing drive assembly (403). The pressing drive assembly (403) drives the upper pressing plate (402) to move vertically up and down and continuously and elastically press the plastic bags stacked on the horizontally arranged base plate (401). The pressing assembly (5) is located above the front side of the upper pressing plate (402). The actuator of the pressing assembly (5) moves vertically up and down to press the tail of the plastic bag down onto the front side wall of the base plate (401). The pressing assembly (6) is located below the front side of the base plate (401). The actuator of the pressing assembly (6) presses the tail of the plastic bag onto the front side wall of the base plate (401). The pressing component (5) includes a gantry frame, a lower insert plate (501), and a pressing drive component (505). The inner side of the vertical beam of the gantry frame is vertically guided by a linear guide rail and a slider. The pressing drive component (505) drives the gantry frame to move up and down reciprocally. The top of the lower insert plate (501) is connected to the bottom of the crossbeam of the gantry frame. The downward stroke of the lower insert plate (501) presses the tail of the plastic bag downward. The bottom edge of the lower insert plate (501) is provided with a clearance slot (504). The actuator of the pressing component (6) presses the tail of the plastic bag against the front side wall of the bottom plate (401) at the clearance slot (504). The lower push assembly (5) also includes a main air pipe (502) and an air outlet branch pipe (503). The main air pipe (502) is arranged along the crossbeam of the gantry frame. Multiple air outlet branch pipes (503) are arranged at equal intervals on the rear side wall of the lower insert plate (501). The air outlet branch pipes (503) are arranged vertically and their tops are connected to the main air pipe (502). The air inlet of the main air pipe (502) is connected to a compressed air source. The pressing assembly (6) includes a pressing shaft (601), a drive swing arm (602), and a finger clamp component. The pressing shaft (601) is supported by bearings at both ends on the side wall of the frame (1). The drive swing arm (602) is located at one end of the pressing shaft (601) and connected to the pressing drive component. A plurality of finger clamp components are installed at intervals on the pressing shaft (601). The finger clamp components press the tail of the plastic bag against the front side wall of the bottom plate (401). The finger clip component includes a mounting block (603), a finger clip (604), a torsion spring (605), a torsion spring shaft (606), an inner locking plate (607), and an outer locking cover (608). The mounting block (603) is detachably mounted on the pressing shaft (601). A mounting groove is provided on one side of the mounting block (603). The torsion spring shaft (606) is located at the bottom of the mounting groove. The bottom hole of the finger clip (604) is sleeved on the torsion spring shaft (606). The torsion spring (605) is sleeved on the outside of the torsion spring shaft (606) and its two ends are fixed by the inner locking plate (607) and the outer locking cover (608) respectively. The inner locking plate (607) is fixed on the outer side wall of the finger clip (604).

2. The stacking and positioning mechanism for a bag-making machine according to claim 1, characterized in that, The mounting block (603) has a locking slot (6031) at the bottom of the mounting hole that mates with the pressing shaft (601). The mounting block (603) is fixedly installed by pressing the locking slot (6031) with bolts.

3. The stacking and positioning mechanism for a bag-making machine according to claim 1, characterized in that: The finger clip (604) is bent backward at the top and has a finger clip head (6041) installed at the top. The finger clip head (6041) is made of plastic or rubber.

4. The stacking and positioning mechanism for a bag-making machine according to claim 1, characterized in that: The inner locking plate (607) is fixed to the outer wall of the finger clip (604) by screws, and the outer locking cover (608) is locked to the outer end of the torsion spring shaft (606) by a radially arranged set screw.

5. The stacking and positioning mechanism for a bag-making machine according to claim 1, characterized in that: It also includes an additional drive shaft (7), the two ends of which are supported by bearing seats on the side wall and the middle partition of the frame (1). The outer end of the additional drive shaft (7) is connected to the drive unit by a pulley drive. A first eccentric wheel (701) and a second eccentric wheel (702) are installed on the additional drive shaft (7). The first eccentric wheel (701) transmits power to the lower pressing assembly (5), and the second eccentric wheel (702) transmits power to the pressing assembly (6).

6. A working method for a stacking and positioning mechanism of a bag making machine, characterized in that: Multiple individual plastic bags are stacked using the stacking and positioning mechanism of the bag making machine described in any one of claims 1 to 5.

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