A point-cut mechanism and bag making machine using the same

Abstract

The utility model relates to the technical field of plastic bag processing, concretely is a kind of point break cutting mechanism, it includes the lower rotary cutter and upper cooperation piece installed in point break support, the upper cooperation piece is rotary cutter roll or fixed upper cutter, the edge of the lower rotary cutter is point break blade, simultaneously, the utility model also provides the bag making machine using the point break cutting mechanism, can reduce the cutter damage of point break, reduce maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of plastic bag processing technology, specifically to a point-cutting mechanism and a bag making machine using the point-cutting mechanism. Background Technology

[0002] A bag-making machine is a machine used to produce various plastic or other material packaging bags. Its processing range includes packaging bags of various sizes and thicknesses made of plastic or other materials, with plastic packaging bags being the primary product. During processing, heat sealing and point-cutting are achieved. Current point-cutting methods use a reciprocating cutter that moves up and down to create point-cutting lines on the plastic bag. The cutter's prolonged hard collision with the lower cutter holder, combined with the cutter's own inertia, easily leads to damage after a period of use, requiring frequent downtime for replacement, thus affecting production efficiency and increasing maintenance costs. Summary of the Invention

[0003] To solve the above-mentioned technical problems, this utility model provides a point-cutting mechanism, which can reduce the damage to the cutter at point points and reduce maintenance costs; at the same time, this utility model also provides a bag making machine using the point-cutting mechanism.

[0004] The technical solution is as follows: a point-breaking cutting mechanism, characterized in that it includes a lower rotating cutter and an upper mating component installed on a point-breaking bracket, wherein the upper mating component is a rotating cutter roller or a fixed upper cutter, and the cutting edge of the lower rotating cutter is a point-breaking blade.

[0005] A further feature is that the lower rotating cutter is connected to a first drive motor, the rotating cutter roller is connected to a second drive motor, the lower rotating cutter includes a cutter holder and a cutter, one or more cutters are mounted on the cutter holder, the cutters are arranged along the axial direction of the rotating cutter roller, and the circular trajectory of the cutting edge of the cutter is tangent to the outer circle of the rotating cutter roller;

[0006] The fixed upper cutter includes a fixed base and an upper cutter. The two ends of the fixed base are connected to the point-breaking bracket through a fixed shaft. The lower rotating cutter includes a cutting roller and a lower cutter. One or more lower cutters are evenly arranged on the cutting roller. The lower cutter forms a certain angle with the axial direction of the cutting roller. The circular trajectory of the lower cutter's blade rotation is tangent to the blade of the upper cutter.

[0007] A bag-making machine using a point-cutting mechanism is characterized in that it comprises an unwinding mechanism, a first transition mechanism, a heat-sealing mechanism, the point-cutting mechanism, a conveying mechanism, a buffer mechanism, a second transition mechanism, and a winding mechanism arranged in sequence.

[0008] A further feature is that the first transition mechanism includes a guide roller group, a support platform and a first guide roller, a cloth block is provided on the support platform, an elastic pressure bar is provided on the cloth block, and arc-shaped rods are connected to both ends of the first guide roller;

[0009] The heat sealing mechanism includes a fixed support platform and a lifting heating seal;

[0010] The conveying mechanism includes a conveying bracket, on which a pair of driving rollers and a pair of driven rollers are mounted. Grooves are formed on the driving rollers and the driven rollers, and annular tension springs passing through the driving rollers and the driven rollers are disposed in the grooves.

[0011] The buffer mechanism includes a first buffer roller, a fixed plate, and a second buffer roller. A naturally hanging cooling mat is provided on the fixed plate, and the cooling mat is located in the buffer space left between the first buffer roller and the fixed plate.

[0012] The second transition mechanism includes a fixed guide rod and a rear guide roller.

[0013] By adopting this utility model, when cutting a line at the cutting point, the traditional up-and-down cutting method is eliminated, and a rotating point-cutting knife is used instead. This avoids the impact between the blade and the tool holder, making it less prone to damage, reducing maintenance costs, and enabling continuous processing for a long time. Attached Figure Description

[0014] Figure 1 This is a top view of the structure of this utility model;

[0015] Figure 2 This is the main view of the first type of point-cutting mechanism;

[0016] Figure 3 for Figure 2 Left view of the rotating cutter roller and the lower rotating cutter;

[0017] Figure 4 This is a schematic diagram of the second type of point-cutting mechanism;

[0018] Figure 5 Top view of the cutting roller and lower cutter;

[0019] Figure 6 This is the front view of the heat sealing mechanism;

[0020] Figure 7 This is a schematic diagram of the conveying mechanism. Detailed Implementation

[0021] See Figure 1As shown, a bag-making machine using a point-cutting mechanism includes, in sequence, an unwinding mechanism 1, a first transition mechanism 2, a heat-sealing mechanism 3, a point-cutting mechanism 4, a conveying mechanism 5, a buffer mechanism 6, a second transition mechanism 7, and a winding mechanism 8. The unwinding mechanism 1 and the winding mechanism 8 both employ existing mature technologies. The point-cutting mechanism 4 can have two structures; the first structure is as follows: Figure 2 and Figure 3 As shown, the device includes a point-breaking bracket 4-1, on which a lower rotating cutter 4-2 and a rotating cutter roller 4-3 are mounted. The cutting edge of the lower rotating cutter 4-2 is a point-breaking blade. The lower rotating cutter 4-2 is connected to a first drive motor, and the rotating cutter roller 4-3 is connected to a second drive motor. The first and second drive motors are independently controlled, and their speeds can be controlled separately. That is, the conveying speed of the plastic bag and the rotation speed of the cutter are not fixed and can be adjusted arbitrarily to meet the requirements of different types of plastic bags. The lower rotating cutter 4-2 includes a blade holder and a cutter. Two evenly arranged cutters are mounted on the blade holder. The cutters are arranged along the axial direction of the rotating cutter roller 4-3, and the circular trajectory of the cutting edge is tangent to the outer circle of the rotating cutter roller 4-3.

[0022] The second structure is as follows: Figure 4 and Figure 5 As shown, the fixed upper cutter includes a fixed base 4-4 and an upper cutter 4-5. The two ends of the fixed base 4-4 are connected to the point-cutting bracket through a fixed shaft. The lower rotating cutter includes a cutting roller 4-6 and a lower cutter 4-7. A lower cutter 4-7 is installed on the cutting roller 4-6. The lower cutter 4-7 and the axial direction of the cutting roller 4-6 are at a certain angle, generally about 5°. The circular trajectory of the blade of the lower cutter 4-7 is tangent to the blade of the upper cutter 4-5. Since the lower cutter 4-7 is inclined, one end of the lower cutter 4-7 will first contact the upper cutter 4-5 to start cutting. As the cutting roller 4-6 continues to rotate, a complete cut is achieved, similar to the cutting method of scissors. At this time, the cut point-cutting line will have a deviation of about 2°, but it does not affect the normal use of the product.

[0023] The cutting edge of the downward rotating cutter 4-2 is a point-cutting blade.

[0024] The first transition mechanism 2 includes a guide roller group 2-1, a support platform 2-2, and a first guide roller 2-3. A cloth block 2-4 is provided on the support platform 2-2, and a pressure rod 2-5 is provided on the cloth block 2-4. The pressure rod 2-5 is a tension spring, and its two ends are fixed to the support platform 2-2 to press down the cloth block 2-4. The cloth block 2-4 allows the plastic bag to open and prevents it from retracting. The two ends of the first guide roller 2-3 are connected to arc-shaped rods 2-6, which are also used to allow the plastic bag to unfold to both sides and ensure the flatness of the plastic bag.

[0025] See Figure 6As shown, the heat sealing mechanism 3 includes a fixed support platform 3-1 and a lifting heating seal 3-2. The lifting heating seal 3-2 is connected to a lifting seat 3-3. The lifting seat 3-3 drives the lifting heating seal 3-2 to move up and down to achieve heat sealing.

[0026] See Figure 7 As shown, the conveying mechanism 5 includes a conveying bracket 5-1, on which a pair of active rollers 5-2 and a pair of driven rollers 5-3 are mounted, i.e., there are two on the top and two on the bottom. Grooves are formed on the active rollers 5-2 and the driven rollers 5-3, and annular tension springs 5-4 are set in the grooves, passing through the active rollers 5-2 and the driven rollers 5-3. The active rollers 5-2 are connected to a motor 5-5. The two active rollers 5-2 clamp the plastic bag 9 and provide power when they rotate, so that the plastic bag 9 is conveyed forward. When the active rollers 5-2 rotate, the annular tension springs 5-4 move with them, which drives the driven rollers 5-3 to rotate, similar to the function of a belt. The annular tension springs 5-4 are formed by connecting one tension spring end to end.

[0027] The buffer mechanism 6 includes a first buffer roller 6-1, a fixed plate 6-2, and a second buffer roller 6-3. A naturally hanging cooling mat 6-4 is provided on the fixed plate 6-2 and is fixed by a clip 6-5. The cooling mat 6-4 is located in the buffer space left between the first buffer roller 6-1 and the fixed plate 6-2.

[0028] The second transition mechanism 7 includes a fixed guide rod 7-1 and a rear guide roller 7-2.

[0029] The plastic bag 9 is unwound from the unwinding mechanism 1, passes through the first transition mechanism 2 and reaches the heat sealing mechanism 3 for heat sealing, then reaches the point cutting mechanism 4 for point cutting, and then passes through the conveying mechanism 5, the buffer mechanism 6 and the second transition mechanism 7 before reaching the winding mechanism 8 for winding.

Claims

1. A point-breaking cutting mechanism, characterized in that, It includes a lower rotating cutter and an upper mating component mounted on a point-breaking bracket. The upper mating component is a rotating cutter roller or a fixed upper cutter. The cutting edge of the lower rotating cutter is a point-breaking blade. The lower rotating cutter is connected to a first drive motor, and the rotating cutter roller is connected to a second drive motor. The lower rotating cutter includes a cutter holder and a cutter. One or more cutters are evenly arranged on the cutter holder. The cutters are arranged along the axial direction of the rotating cutter roller, and the circular trajectory of the cutting edge of the cutter is tangent to the outer circle of the rotating cutter roller.

2. The point-breaking cutting mechanism according to claim 1, characterized in that, The fixed upper cutter includes a fixed base and an upper cutter. The two ends of the fixed base are connected to the point-breaking bracket through a fixed shaft. The lower rotating cutter includes a cutting roller and a lower cutter. One or more lower cutters are evenly arranged on the cutting roller. The lower cutter forms a certain angle with the axial direction of the cutting roller. The circular trajectory of the lower cutter's blade rotation is tangent to the blade of the upper cutter.

3. A bag-making machine using the point-cutting mechanism of claim 1, characterized in that, It includes an unwinding mechanism, a first transition mechanism, a heat sealing mechanism, a point-cutting mechanism, a conveying mechanism, a buffer mechanism, a second transition mechanism, and a winding mechanism arranged in sequence.

4. The bag-making machine according to claim 3, characterized in that, The first transition mechanism includes a guide roller group, a support platform and a first guide roller. A cloth block is provided on the support platform, and an elastic pressure bar is provided on the cloth block. Arc-shaped rods are connected to both ends of the first guide roller.

5. The bag-making machine according to claim 3, characterized in that, The heat sealing mechanism includes a fixed support platform and a lifting heating seal.

6. The bag-making machine according to claim 3, characterized in that, The conveying mechanism includes a conveying bracket, on which a pair of driving rollers and a pair of driven rollers are mounted. Grooves are formed on the driving rollers and the driven rollers, and annular tension springs passing through the driving rollers and the driven rollers are disposed in the grooves.

7. The bag-making machine according to claim 3, characterized in that, The buffer mechanism includes a first buffer roller, a fixed plate, and a second buffer roller. A naturally hanging cooling mat is provided on the fixed plate, and the cooling mat is located in the buffer space left between the first buffer roller and the fixed plate.

8. The bag-making machine according to claim 3, characterized in that, The second transition mechanism includes a fixed guide rod and a rear guide roller.

Images