Bag bottom forming and heating mechanism of a bag making machine

Abstract

The utility model discloses a bag bottom forming heating mechanism of bag making machine, including support frame and adjusting frame, the one side of support frame is provided with adjusting frame, the one side of adjusting frame is close to support frame and is provided with connecting shaft, and adjusting frame is through connecting shaft and support frame swing joint, the one end of adjusting frame is away from support frame and is swinged and installed with adjusting roller, the top of support frame swinged and installed with left limit roller, the top of support frame one side of left limit roller swinged and installed with right limit roller, the lateral wall of support frame one side of right limit roller is installed with bearing frame, the other side of support frame is installed with and places the frame, and the top of placing frame swinged and installed with winding roller. The utility model not only realized convenient linkage tensioning plastic bag and centering clamping limit and prevented the displacement of plastic bag, made it convenient for two -way clamping heating sealing bottom and manufacturing sawtooth tear edge to plastic bag, and improved the quality when plastic bag heating sealing bottom.

Description

Technical Field

[0001] This utility model relates to the field of packaging bag production technology, specifically to a bag bottom forming heating mechanism for a bag making machine. Background Technology

[0002] A bag-making machine is an automated piece of equipment mainly used to process packaging bags made of various materials such as plastics, non-woven fabrics, and paper. Based on their function and structure, bag-making machines can be divided into flat bag machines, three-side sealing bag machines, four-side sealing bag machines, and stand-up pouch machines. Flat bag machines are mainly used to produce flat bags and bottom-sealed bags; three-side sealing bag machines are mainly used to produce three-side-sealed bags and stand-up pouches; four-side sealing bag machines are mainly used to produce four-side-sealed bags; and stand-up pouch machines are mainly used to produce bag-shaped or box-shaped products. When heating and sealing the bottom of the packaging bag, traditional bottom-forming heating mechanisms often lack the function of centering the plastic bag. To prevent the plastic bag from shifting position during the forming and heating process, a new bottom-forming heating mechanism for bag-making machines is proposed.

[0003] For example, the bag bottom forming heating mechanism of a bag making machine disclosed in the authorization announcement number CN222554421U includes a heating component. The heating component is set after the bag bottom folding and forming station and before the bottom adhesive bonding station. When the folded bag bottom is sent to the heating component, adhesive is already attached to the folded end of the bag bottom. The heating temperature of the heating component can melt the adhesive to achieve the bonding of the folded end of the bag bottom.

[0004] Although it achieves a simple structure and reasonable design, it can ensure the stability of the shape of the bottom of the packaging bag after folding and improve its sealing effect, ensuring that the bottom of the bag will not leak.

[0005] However, the existing heating mechanism does not solve the problems of inconvenient linkage tensioning of plastic bags and centering clamping and limiting to prevent plastic bags from shifting during use, nor does it facilitate bidirectional clamping, heating, sealing, and creating serrated tear edges of plastic bags, thus affecting the quality of plastic bag heating and sealing. Utility Model Content

[0006] The purpose of this utility model is to provide a bag bottom forming heating mechanism for a bag making machine, so as to solve the problems mentioned in the background art, which are not convenient for linking and tightening plastic bags and centering and clamping to prevent plastic bags from shifting, which are not conducive to bidirectional clamping, heating and sealing of plastic bags and creating serrated tear edges, thus affecting the quality of plastic bags during heating and sealing.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a bag bottom forming heating mechanism for a bag making machine, comprising a support frame and an adjusting frame. An adjusting frame is provided on one side of the support frame, and a connecting shaft is provided on the side of the adjusting frame near the support frame. The adjusting frame is movably connected to the support frame via the connecting shaft. An adjusting roller is movably mounted on the end of the adjusting frame away from the support frame. A left limiting roller is movably mounted on the top of the support frame, and a right limiting roller is movably mounted on the top of the support frame on the side of the left limiting roller. A bearing frame is mounted on the side wall of the support frame on the side of the right limiting roller. A placement frame is installed on the other side of the support frame. A take-up roller is movably installed on the top of the placement frame. A worm gear drive mechanism is installed on the side wall of the placement frame, and the power output end of the worm gear drive mechanism is connected to the take-up roller. An integrated frame is installed on the top of the support frame. A placement plate is installed on the side of the integrated frame away from the support frame. A cylinder is movably installed inside the support frame. A first push arm is installed on the output end of the cylinder. A pin is provided on the end of the first push arm near the adjustment frame, and the first push arm is movably connected to the adjustment frame through the pin.

[0008] Preferably, a bidirectional lead screw is movably installed inside the integrated frame, and a stepper motor is installed on the outer wall of the integrated frame, with the output end of the stepper motor connected to the bidirectional lead screw.

[0009] Preferably, the surface of the bidirectional lead screw is fitted with two sets of threaded sleeves, and the threaded sleeves are threadedly connected to the bidirectional lead screw, and a C-shaped bracket is installed at the top of each threaded sleeve.

[0010] Preferably, electric push rods are symmetrically installed at the bottom end of the placement plate, and a second push arm is installed at the output end of each electric push rod.

[0011] Preferably, a movable plate is provided above the placement plate, and the movable plate is connected to the second push arm.

[0012] Preferably, a toothed strip is installed at the bottom of the movable plate, and heating strips are installed on the sides of the movable plate and the placement plate that are close to each other.

[0013] Compared with the prior art, the beneficial effects of this utility model are: the heating mechanism not only realizes convenient linkage tensioning of plastic bags and centering clamping and limiting to prevent plastic bags from shifting, but also facilitates bidirectional clamping, heating and sealing of plastic bags and the creation of serrated tear edges, and improves the quality of plastic bags when heating and sealing the bottom.

[0014] An uncut long plastic bag is passed through the upper surface of the adjusting roller, the lower surface of the left limiting roller, the upper surface of the right limiting roller, between the C-frame, between the moving plate and the placement plate, and connected to the take-up roller. This plastic bag is similar to the tearable plastic bags used to hold vegetables in supermarkets. The worm gear drive mechanism is activated, which drives the take-up roller to rotate, thus winding the plastic bag. A cylinder drives the first push arm to move, and the first push arm drives the adjusting frame to rotate around the connecting shaft via a pin. The adjusting frame drives the adjusting roller to rotate, which provides tension to the plastic bag to prevent wrinkles and prepare it for subsequent processing. In preparation for heating and sealing the bottom of the bag, when it is necessary to heat and seal the bottom of the bag, the take-up roller stops winding, the electric push rod drives the second push arm to move, the second push arm drives the moving plate to move, and the moving plate drives a set of heating strips to move, so that the two sets of heating strips clamp the long plastic bag, and the heating strips heat and seal the bottom of the plastic bag. The moving plate simultaneously drives the toothed strip to move downward, so that the toothed edge of the toothed strip contacts the plastic bag. With the cooperation of the placement plate, the plastic edge is made into a serrated edge, which makes it easy to tear the connected plastic bags. This realizes convenient linkage tensioning of the plastic bag, which facilitates bidirectional clamping, heating and sealing of the bottom of the plastic bag and creating a serrated tear edge.

[0015] To prevent the plastic bag from deviating during the movement of the plastic belt, a stepper motor drives a bidirectional lead screw to rotate. The bidirectional lead screw then drives two sets of threaded sleeves to move towards each other, which in turn drives the C-shaped frames to move towards each other. This allows the two sets of C-shaped frames to contact the two sides of the plastic bag, thereby limiting the plastic bag's movement and preventing it from deviating, thus ensuring the quality of the plastic bag during heat sealing. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a frontal cross-sectional view of the present invention.

[0018] Figure 3 This is a side cross-sectional view of the integrated frame of this utility model.

[0019] Figure 4 This is a three-dimensional perspective structural diagram of the placement plate of this utility model.

[0020] In the diagram: 1. Support frame; 2. Placement frame; 3. Take-up roller; 4. Worm gear drive mechanism; 5. Left limit roller; 6. Right limit roller; 7. Bearing frame; 8. Integrated frame; 9. Placement plate; 10. Adjusting roller; 11. Adjusting frame; 12. Connecting shaft; 13. Pin shaft; 14. Cylinder; 15. First push arm; 16. Bidirectional lead screw; 17. Threaded sleeve; 18. C-shaped frame; 19. Stepper motor; 20. Electric push rod; 21. Second push arm; 22. Moving plate; 23. Heating strip; 24. Toothed strip. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0022] Please see Figure 1-4 This utility model provides an embodiment of a bag bottom forming heating mechanism for a bag making machine, comprising a support frame 1 and an adjusting frame 11. The adjusting frame 11 is provided on one side of the support frame 1, and a connecting shaft 12 is provided on the side of the adjusting frame 11 closest to the support frame 1. The adjusting frame 11 is movably connected to the support frame 1 via the connecting shaft 12. An adjusting roller 10 is movably mounted on the end of the adjusting frame 11 away from the support frame 1. A left limiting roller 5 is movably mounted on the top of the support frame 1. A right limiting roller 6 is movably mounted on the top of the support frame 1 on the side of the left limiting roller 5. A bearing frame 7 is mounted on the side wall of the support frame 1 on the side of the right limiting roller 6. A bearing frame 7 is mounted on the other side of the support frame 1. The support frame 1 is equipped with a placement frame 2, a take-up roller 3 is movably mounted on the top of the placement frame 2, a worm gear drive mechanism 4 is mounted on the side wall of the placement frame 2, and the power output end of the worm gear drive mechanism 4 is connected to the take-up roller 3. An integrated frame 8 is mounted on the top of the support frame 7, and a placement plate 9 is mounted on the side of the integrated frame 8 away from the support frame 7. A cylinder 14 is movably mounted inside the support frame 1, and the cylinder 14 plays a power driving role. A first push arm 15 is mounted on the output end of the cylinder 14. A pin 13 is provided at the end of the first push arm 15 near the adjustment frame 11, and the first push arm 15 is movably connected to the adjustment frame 11 through the pin 13.

[0023] Electric push rods 20 are symmetrically installed at the bottom of the placement plate 9. The electric push rods 20 serve as power drives, and a second push arm 21 is installed at the output end of each electric push rod 20.

[0024] A movable plate 22 is provided above the placement plate 9, and the movable plate 22 is connected to the second push arm 21;

[0025] A toothed strip 24 is installed at the bottom of the movable plate 22, and heating strips 23 are installed on the sides of the movable plate 22 and the placement plate 9 that are close to each other.

[0026] An uncut long plastic bag is passed through the upper surface of the adjusting roller 10, the lower surface of the left limiting roller 5, the upper surface of the right limiting roller 6, between the C-frame 18, between the moving plate 22 and the placement plate 9, and connected to the winding roller 3. This plastic bag is similar to the tearable plastic bags used to hold vegetables in supermarkets. The worm gear drive mechanism 4 is activated, which drives the winding roller 3 to rotate, thus winding the plastic bag. The cylinder 14 is activated, which drives the first push arm 15 to move. The first push arm 15 drives the adjusting frame 11 to rotate around the connecting shaft 12 via the pin 13. The adjusting frame 11 drives the adjusting roller 10 to rotate, thus providing tension to the plastic bag to prevent wrinkles. In preparation for subsequent heat sealing, when it is necessary to heat seal the bottom of the bag, the take-up roller 3 stops winding, the electric push rod 20 is opened, the electric push rod 20 drives the second push arm 21 to move, the second push arm 21 drives the moving plate 22 to move, and the moving plate 22 drives a set of heating strips 23 to move, so that the two sets of heating strips 23 clamp the long plastic bag, and the heating strips 23 heat seal the bottom of the plastic bag. The moving plate 22 simultaneously drives the toothed strip 24 to move downward, so that the toothed edge of the toothed strip 24 contacts the plastic bag. With the cooperation of the placement plate 9, the plastic edge is made to generate a serrated edge, so that the connected plastic bags can be easily torn apart. This realizes convenient linkage tensioning of the plastic bag, which facilitates bidirectional clamping, heat sealing and serrated tearing of the plastic bag.

[0027] A bidirectional lead screw 16 is movably installed inside the integrated frame 8, and a stepper motor 19 is installed on the outer wall of the integrated frame 8, with the output end of the stepper motor 19 connected to the bidirectional lead screw 16.

[0028] Two sets of threaded sleeves 17 are fitted on the surface of the double-acting lead screw 16, and the threaded sleeves 17 are threadedly connected to the double-acting lead screw 16. A C-shaped bracket 18 is installed on the top of each threaded sleeve 17.

[0029] To prevent the plastic bag from deviating during the movement of the plastic bag, the stepper motor 19 can be turned on, which drives the bidirectional lead screw 16 to rotate. With the bidirectional lead screw 16 connected to the threaded sleeve 17, the bidirectional lead screw 16 drives the two sets of threaded sleeves 17 to move towards each other. The threaded sleeves 17 drive the C-shaped frames 18 to move towards each other, so that the two sets of C-shaped frames 18 contact the two sides of the plastic bag respectively, thereby limiting the plastic bag and preventing it from deviating during movement, thus ensuring the quality of the plastic bag during heat sealing.

[0030] Working principle: An uncut long plastic bag is passed through the upper surface of the adjusting roller 10, the lower surface of the left limiting roller 5, the upper surface of the right limiting roller 6, between the C-shaped frame 18, between the moving plate 22 and the placement plate 9, and connected to the take-up roller 3. This plastic bag is similar to the tearable plastic bags used to hold vegetables in supermarkets. The worm gear drive mechanism 4 drives the take-up roller 3 to rotate, and the take-up roller 3 rolls up the plastic bag. The cylinder 14 drives the first push arm 15 to move, and the first push arm 15 drives the adjusting frame 11 to rotate around the connecting shaft 12 via the pin 13. The adjusting frame 11 drives the adjusting roller 10 to rotate, and the adjusting roller 10 provides tension to the plastic bag to tighten it and prevent wrinkles, preparing it for subsequent heat sealing. When it is necessary to heat seal the bottom of the bag, the take-up roller 3 stops rolling, and the electric push rod 20 drives the second push arm 21 to move. The second push arm 21 drives the moving plate 22 to move. The moving plate 22 drives a set of heating strips 23 to move, so that the two sets of heating strips 23 clamp the long plastic bag, and the heating strips 23 heat and seal the bottom of the plastic bag. Simultaneously, the moving plate 22 drives the toothed strip 24 to move downward, so that the toothed edge of the toothed strip 24 contacts the plastic bag. With the cooperation of the placement plate 9, the plastic edge is made into a serrated edge, which makes it easy to tear the connected plastic bags. During the movement of the plastic belt, in order to prevent the plastic bag from deviating, the stepper motor 19 drives the bidirectional lead screw 16 to rotate. The bidirectional lead screw 16 drives the two sets of threaded sleeves 17 to move towards each other. The threaded sleeves 17 drive the C-shaped frame 18 to move towards each other, so that the two sets of C-shaped frames 18 contact the two sides of the plastic bag respectively, thereby limiting the plastic bag and preventing it from deviating during movement, thus ensuring the quality of the plastic bag during heating and sealing. The above is the complete usage of the bag bottom forming heating mechanism of the bag making machine.

Claims

1. A bag bottom forming and heating mechanism of a bag making machine, comprising a support frame (1) and an adjusting frame (11), characterized in that: An adjusting frame (11) is provided on one side of the support frame (1). A connecting shaft (12) is provided on the side of the adjusting frame (1) near the support frame (1), and the adjusting frame (11) is movably connected to the support frame (1) through the connecting shaft (12). An adjusting roller (10) is movably installed on the end of the adjusting frame (11) away from the support frame (1). A left limiting roller (5) is movably installed on the top of the support frame (1). A right limiting roller (6) is movably installed on the top of the support frame (1) on the side of the left limiting roller (5). A bearing frame (7) is installed on the side wall of the support frame (1) on the side of the right limiting roller (6). A placement frame (2) is installed on the other side of the support frame (1). The top of the support frame (1) is movably mounted with a take-up roller (3), and the side wall of the placement frame (2) is mounted with a worm gear drive mechanism (4), and the power output end of the worm gear drive mechanism (4) is connected to the take-up roller (3). The top of the support frame (7) is mounted with an integrated frame (8), and the side of the integrated frame (8) away from the support frame (7) is mounted with a placement plate (9). The inside of the support frame (1) is movably mounted with a cylinder (14), and the output end of the cylinder (14) is mounted with a first push arm (15). The end of the first push arm (15) near the adjustment frame (11) is provided with a pin (13), and the first push arm (15) is movably connected to the adjustment frame (11) through the pin (13).

2. A bag bottom forming and heating mechanism of a bag making machine according to claim 1, characterized in that: A bidirectional lead screw (16) is movably installed inside the integrated frame (8), and a stepper motor (19) is installed on the outer wall of the integrated frame (8), with the output end of the stepper motor (19) connected to the bidirectional lead screw (16).

3. The bag bottom forming heating mechanism of a bag making machine according to claim 2, characterized in that: The surface of the bidirectional lead screw (16) is fitted with two sets of threaded sleeves (17), and the threaded sleeves (17) are threadedly connected to the bidirectional lead screw (16), and the top of each threaded sleeve (17) is fitted with a C-shaped bracket (18).

4. The bag bottom forming heating mechanism of a bag making machine according to claim 1, characterized in that: Electric push rods (20) are symmetrically installed at the bottom end of the placement plate (9), and a second push arm (21) is installed at the output end of each electric push rod (20).

5. The bag bottom forming heating mechanism of a bag making machine according to claim 1, characterized in that: A movable plate (22) is provided above the placement plate (9), and the movable plate (22) is connected to the second push arm (21).

6. The bag bottom forming heating mechanism of a bag making machine according to claim 5, characterized in that: The bottom end of the movable plate (22) is equipped with a toothed strip (24), and heating strips (23) are installed on the sides of the movable plate (22) and the placement plate (9) that are close to each other.

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