Film cutting tool and blown film bag making all-in-one machine using the same

Abstract

The utility model discloses a film cutting tool with more reasonable structure and a film blowing and bag making integrated machine using the same. The film cutting tool comprises a cutter body, and the cutter body is provided with a cutting edge. The cutter body is in a planar shape and integrally arranged on a cutter body seat. An electric heating pipe is arranged in the cutter body seat. The electric heating pipe is connected with a heating control circuit. A heat insulation mica block is connected to the cutter body seat. The heat insulation mica block is connected with a connecting seat. The connecting seat is used for connecting with a machine frame. The cutter body of the film cutting tool can transfer heat more quickly and uniformly, and can avoid transferring heat to the machine frame, thereby ensuring the safety of personnel.

Description

Technical Field

[0001] This utility model relates to a film cutting tool and an integrated blown film bag making machine using the tool. Background Technology

[0002] In the field of flexible packaging, perforated plastic bags (hereinafter referred to as perforated bags) are widely used for the independent packaging of food, daily chemical products, and medical supplies due to their ease of separation and use. The traditional industrial production process of perforated bags usually requires two separate steps. In order to complete the bag making process on a single machine, the applicant previously proposed an integrated blown film bag making machine (patent number 2025208050784). This integrated blown film bag making machine includes a base, a feeding hopper, an extrusion mechanism, a die head, an air ring, a manipulator plate, a traction mechanism, a heat sealing and perforation mechanism, and a winding mechanism. This integrated machine can realize the continuous operation of blown film forming and perforated bag making processes, thereby effectively reducing equipment investment costs. Some films are wider, and some customers need to cut them in half. A heat-sealing film-cutting mechanism is installed between the traction mechanism and the heat-sealing and cutting mechanism. The film cutter of the heat-sealing and cutting mechanism cuts the film in half and simultaneously heat-seales the cut edges. The halved film then enters the heat-sealing and cutting mechanism for heat sealing and cutting, and finally enters the winding mechanism for winding. However, existing film cutters are curved strips connected to the cutter holder. Because the curved strip is connected to the cutter holder at both ends, the heating element on the cutter holder can only transfer heat to the cutter head through the two ends of the cutter body, resulting in slow and uneven heat transfer (the areas near the ends are hotter). Furthermore, existing film cutters have the cutter holder directly mounted on the frame, and the heat from the cutter holder is transferred to the frame, posing a safety hazard to personnel. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, this utility model innovatively provides a more rationally structured film cutting tool and an integrated blown film bag making machine that should modify the film cutting tool.

[0004] This membrane cutting tool includes a blade body with a cutting edge, characterized in that: the blade body is planar and integrally formed on a blade body seat, the blade body seat is provided with an electric heating tube, the electric heating tube is connected to a heating control circuit, a heat-insulating mica block is connected to the blade body seat, the heat-insulating mica block is connected to a connecting seat, and the connecting seat is used to connect to a frame.

[0005] The blade of the blade body is located at the upper end and gradually curves downward, while the heat-insulating mica block and the connecting seat are located on the side of the blade body.

[0006] A temperature sensor is provided between the heat-insulating mica block and the blade holder, and the temperature sensor is electrically connected to the heating control circuit.

[0007] The blade body is coated with an anti-stick coating.

[0008] The anti-stick coating is a polytetrafluoroethylene coating or a Teflon coating.

[0009] The heat-insulating mica block is connected to the connecting seat by a first bolt, and the cutter body seat is connected to the heat-insulating mica block by a second bolt.

[0010] The connector has a mounting hole, and a third bolt is threaded onto the connector, which can enter the mounting hole.

[0011] This blown film bag making machine includes a base, a feeding hopper, an extrusion mechanism, a die head, an air ring, a mandrel plate, and a traction mechanism; the traction mechanism includes an active traction roller and a passive traction roller; a heat-sealing point-breaking mechanism is provided on one side of the discharge end of the traction mechanism, characterized in that: the film cutting tool mentioned above is provided between the traction mechanism and the heat-sealing point-breaking mechanism.

[0012] The heat-sealing break mechanism has a winding mechanism on one side of the discharge end. The winding mechanism includes an active winding roller, a passive winding roller and a winding motor. The active winding roller and the passive winding roller are close to each other, and the active winding roller is connected to the winding motor for transmission.

[0013] According to the present invention, the heat transfer of the cutting tool body is faster and more uniform, while avoiding the transfer of heat to the machine frame, thus ensuring personnel safety. Attached Figure Description

[0014] Figure 1 A schematic diagram of a blown film bag making machine; Figure 2 This is a front view of the membrane cutting tool; Figure 3 This is a side view of the membrane cutting tool. Detailed Implementation

[0015] like Figure 2 and Figure 3As shown, this membrane cutting tool includes a blade body 90 with a cutting edge 900. The blade body 90 is planar and integrally mounted on a blade holder 91. An electric heating element 97 is housed within the blade holder 91. This electric heating element 97 is connected to a heating control circuit (the heating control circuit is prior art and not shown in the figure). When energized by the heating control circuit, the electric heating element 97 can be controlled to heat the blade holder 91. Since the blade holder 91 and the blade body 90 are integrally formed, and the blade... The body 90 is a single, continuous surface, allowing the cutter holder 91 to quickly and evenly transfer heat to the cutter body 90, enabling the blade 900 of the cutter body 90 to cut the film. Additionally, a heat-insulating mica block 92 is connected to the cutter holder 91, and this heat-insulating mica block 92 is connected to a connecting seat 93, which is used to connect to the frame. Because the heat-insulating mica block 92 has a heat-insulating function, it can effectively prevent the cutter holder 91 from transferring heat to the connecting seat 93, thereby preventing the frame from overheating and ensuring personnel safety.

[0016] like Figure 2 As shown, the blade 900 of the blade body 90 is located at the upper end and gradually curves downward, while the heat-insulating mica block 92 and the connecting seat 93 are located on the side of the blade body 90. Figure 1 As shown, after the connecting seat 93 is installed on the frame 1, the blade 900 of the cutter body 90 faces the film coming down from above, thereby cutting and heat-sealing the film.

[0017] To maintain the temperature of the blade 900 at a set temperature, a temperature sensor (not shown) is installed between the heat-insulating mica block 92 and the blade holder 91. The temperature sensor is electrically connected to the heating control circuit. The temperature sensor can sense the temperature of the blade holder 91, thereby controlling the heating control circuit to heat or not heat the blade holder 91, thus keeping the temperature of the blade 900 stable.

[0018] To prevent the heat-sealed film from sticking to the blade body 90, an anti-stick coating is applied to the blade body 90. This anti-stick coating prevents the melted film from adhering to the blade body 90, ensuring proper heat cutting of the film.

[0019] The anti-stick coating is either a polytetrafluoroethylene (PTFE) coating or a Teflon coating. Both of these coatings provide the anti-stick function. Alternatively, a gas-based coating can also be used.

[0020] like Figure 2 As shown, the heat-insulating mica block 92 and the connecting seat 93 are connected by the first bolt 95, and the first bolt 95 connects the two together. The blade holder 91 and the heat-insulating mica block 92 are connected by the second bolt 94, and the second bolt 94 connects the two together.

[0021] like Figure 2As shown, the connecting seat 93 has a mounting hole 930, and a connecting rod is mounted on the frame 1. The connecting rod passes through the mounting hole 930. A third bolt 96 is threaded onto the connecting seat 93. The third bolt 96 can enter the mounting hole 930 and act on the connecting rod, so that the connecting seat 93 is firmly connected to the frame 1.

[0022] like Figure 1 As shown, this blown film bag making integrated machine includes a base 1, a feeding hopper 2, an extrusion mechanism 3, a die head 4, an air ring 11, a mandrel plate 5, and a traction mechanism 6. The traction mechanism 6 includes an active traction roller 60 and a passive traction roller 61. A heat-sealing point-breaking mechanism 8 (including a point-breaking knife) is provided on one side of the discharge end of the traction mechanism 6, and the aforementioned film cutting knife 9 is provided between the traction mechanism 6 and the heat-sealing point-breaking mechanism 8. During operation, dry polyethylene particles (or other plastic raw materials) are added to the feeding hopper 2 of the blown film machine. The plastic particles enter the extrusion mechanism 3 from the feeding hopper 2 by their own weight. The extrusion mechanism 3 pushes the plastic particles forward. During the pushing process, due to the friction between the plastic and the screw, the plastic and the barrel, and the collision and friction between the particles, coupled with the heating outside the barrel, the plastic particles gradually melt. The molten plastic is extruded from the die opening of the die head 4 to form a tubular film preform. An air compressor compresses air and delivers it to the blown film die head. High-pressure air is blown out through the die head 4, causing the tubular film preform to expand to the required width. The inflated film is cooled by the air ring 11. After cooling, the film is further cooled and shrunken by the herringbone plate 5 and then pulled by the traction mechanism 6. It then enters the film cutting knife 9, the heat sealing and breaking mechanism 8, and the winding mechanism 7 in sequence. The film cutting knife 9 cuts the film in half and heat seals the cut edge of the film. The half-cut film then enters the heat sealing and breaking mechanism 8 for heat sealing and breaking (since it is only broken, not completely broken, the film is still continuous. When using it, tear off a bag along the breaking line, and an opening will be formed at the breaking line). Finally, it enters the winding mechanism 7 for winding.

[0023] like Figure 1 As shown, the winding mechanism 7 includes an active winding roller 72, a passive winding roller 71, and a winding motor. The active winding roller 72 and the passive winding roller 71 are close to each other, and the active winding roller 72 is connected to the winding motor for transmission. Driven by the winding motor, the active winding roller 72 and the passive winding roller 71 rotate relative to each other, pulling the film forward to wind it up.

Claims

1. A membrane cutting tool, comprising a blade body (90) having a cutting edge (900) thereon, characterized in that: The blade body (90) is planar and integrally mounted on the blade body seat (91). The blade body seat (91) is provided with an electric heating tube (97), which is connected to a heating control circuit. A heat-insulating mica block (92) is connected to the blade body seat (91), and the heat-insulating mica block (92) is connected to a connecting seat (93). The connecting seat (93) is used to connect to the frame.

2. The film cutting tool according to claim 1, characterized in that: The blade (900) of the blade body (90) is located at the upper end and gradually curves downward, and the heat-insulating mica block (92) and the connecting seat (93) are located on the side of the blade body (90).

3. The film cutting tool according to claim 1, characterized in that: A temperature sensor is provided between the heat-insulating mica block (92) and the blade holder (91), and the temperature sensor is electrically connected to the heating control circuit.

4. A film cutting tool according to claim 1, characterized in that: The blade body (90) is coated with an anti-stick coating.

5. A film cutting tool according to claim 4, characterized in that: The anti-stick coating is a polytetrafluoroethylene coating or a Teflon coating.

6. A film cutting tool according to claim 1, characterized in that: The heat-insulating mica block (92) and the connecting seat (93) are connected by the first bolt (95), and the blade seat (91) and the heat-insulating mica block (92) are connected by the second bolt (94).

7. A film cutting tool according to claim 1, characterized in that: The connector (93) has a mounting hole (930), and a third bolt (96) is threaded onto the connector (93), which can enter the mounting hole (930).

8. A blown film bag making integrated machine, comprising a base (1), a feeding hopper (2), an extrusion mechanism (3), a die head (4), an air ring (11), a mandrel plate (5), and a traction mechanism (6); the traction mechanism (6) includes an active traction roller (60) and a passive traction roller (61); a heat-sealing break mechanism (8) is provided on one side of the discharge end of the traction mechanism (6), characterized in that: The traction mechanism (6) and the heat-sealing and breaking mechanism (8) are provided with a film cutting tool (9) as described in any one of claims 1-7.

9. The blown film bag making machine according to claim 8, characterized in that: The heat-sealing break mechanism (8) has a winding mechanism (7) on one side of the discharge end. The winding mechanism (7) includes an active winding roller (72), a passive winding roller (71) and a winding motor. The active winding roller (72) and the passive winding roller (71) are close to each other. The active winding roller (72) is connected to the winding motor for transmission.

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