Degradable plastic packaging bag hot cutting machine structure with replaceable hot cutter

Abstract

The utility model discloses a degradable plastic packaging bag hot cutting machine structure with a replaceable hot cutter, which belongs to the technical field of plastic packaging bag processing equipment and comprises a hot cutting machine base, and a plurality of groups of rack plates are arranged on two sides of the upper surface of the hot cutting machine base. A plastic film feeding conveying belt and a hot cutting roller are arranged between the front rack plates, a plastic bag discharging shaping belt is arranged between the rear rack plates, and a liftable hot cutter is arranged above the hot cutting roller. Lifting air cylinders are installed on the two sides of the outer side face of the rack plate, a rotating shaft is installed between lifting bases at the upper ends of the lifting air cylinders, the two sides of the rotating shaft are connected with the lifting bases through rotating bearing bases, and locking nuts are arranged on the outer side faces of the rotating bearing bases. According to the structure of the hot cutting machine, the rotating shaft is adopted to change the position of the hot cutter, so that the hot cutter is far away from the electric heating pipe and is cooled at the same time, and the hot cutter is conveniently replaced for plastic bag raw material films with different widths.

Description

Technical Field

[0001] This utility model relates to the technical field of plastic packaging bag processing equipment, and more specifically, to a structure of a biodegradable plastic packaging bag hot cutting machine with replaceable hot cutting blades. Background Technology

[0002] Biodegradable plastic packaging bags are generally produced by adding a certain amount of additives (such as starch, modified starch, photosensitizers, biodegradable agents, etc.) during the plastic production process, which reduces their stability and makes them easier to degrade in the natural environment. For plastic bag raw material films with added photosensitizers and biodegradable agents, their hardness and thickness are generally high. Therefore, after blown film forming, the film roll needs to be cut by hot cutting to achieve the purpose of melting. The hot cutting blade can be heated by electric heating, infrared heating or electromagnetic induction heating.

[0003] Hot-cutting blades are generally of fixed length and perform fixed-distance hot-cutting of plastic bag raw material film on the conveyor belt at unit intervals. This type of hot-cutting blade has two problems: First, because the width of plastic bag raw material film varies from batch to batch, the existing hot-cutting blade uses the same width regardless of the width of the plastic bag raw material film. This results in some areas of the hot-cutting blade only contacting the surface of the conveyor belt and not actually cutting the plastic bag raw material film, causing meaningless wear and tear on the hot-cutting blade and preventing flexible replacement for raw material film of different widths. Second, after prolonged use, the temperature is high when the blade is replaced, posing a safety hazard. Utility Model Content

[0004] The purpose of this invention is to provide a heat-cutting machine structure for biodegradable plastic packaging bags with replaceable heat-cutting blades. In this heat-cutting machine structure, a rotating shaft is used to change the position of the heat-cutting blade, so that the heat-cutting blade is away from the electric heating tube, and the heat-cutting blade is cooled at the same time, which facilitates the replacement of heat-cutting blades for plastic bag raw film of different widths.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A heat-cutting machine structure for biodegradable plastic packaging bags with replaceable heat-cutting blades includes a heat-cutting machine base. Several sets of frame plates are provided on both sides of the upper surface of the base. A plastic film feeding conveyor belt and a heat-cutting roller are located between the front frame plates, and a plastic bag discharge and shaping belt is located between the rear frame plates. A liftable heat-cutting blade is provided above the heat-cutting roller. Lifting cylinders are installed on both sides of the outer surface of the frame plates, and a rotating shaft is installed between the lifting seats at the upper ends of the lifting cylinders. Both sides of the rotating shaft are connected to the lifting seats via rotating bearing seats, and locking nuts are provided on the outer surface of the rotating bearing seats. An inverted concave blade groove is fixed on the shaft body. A rectangular through-groove is formed on the surface of the inverted concave blade groove. Bolts pass through the rectangular through-groove, and heat-cutting blades of different widths are installed at any position in the inverted concave blade groove via the bolts. Rotating handles are provided on the outer surfaces of both ends of the rotating shaft body. The inverted concave blade groove and the heat-cutting blade rotate forward with the rotating shaft.

[0007] As a further optimization of this solution, the upper surface of the machine base is also provided with a cooling air tank. The cooling air tank is connected to a transverse air pipe through a pipeline. The transverse air pipe is supported by two side support plates and spans the area above the plastic film discharge and shaping belt. Several oblique air jet holes are opened on the body of the transverse air pipe. The support plates are fixed to the upper surface of the frame plates on both sides.

[0008] As a further optimization of this solution, an inverted concave frame is provided below the inverted concave knife groove. Several horizontal electric heating tubes are provided inside the concave area of ​​the inverted concave frame, and the inverted concave frame is fixed to the inner side of the lifting seat by L-shaped connecting rods on both sides.

[0009] As a further optimization of this solution, when the hot cutting blade is rotated to the vertical position, the vertical surface of the hot cutting blade is fitted into the inverted concave frame and fits against the electric heating tube. When the hot cutting blade is rotated to the horizontal position, the arc-shaped surface of the hot cutting blade is located at a position diagonally below several oblique jet holes.

[0010] Compared with existing technologies, the beneficial effects of this utility model are as follows:

[0011] This invention uses a rotating shaft structure to connect components such as the hot cutting blade, enabling rotational repositioning of the hot cutting blade. This separates the hot cutting blade from the electric heating element. The blade is then cooled using a cooling gas tank and air jets before disassembly and replacement. The appropriate size hot cutting blade is aligned and replaced according to the width of the plastic film being cut and the transportation location, reducing unnecessary wear and tear on the blade and making replacement safer and more reliable. Attached Figure Description

[0012] Figure 1 This is a schematic diagram showing the working position and structure of the hot cutting blade of this utility model;

[0013] Figure 2 This is a schematic diagram showing the position and structure of the hot cutting blade during disassembly.

[0014] Figure 3 This is a schematic diagram showing the positions of the electric heating element and the hot cutting blade of this utility model;

[0015] Figure 4 This is a schematic diagram of the horizontal air pipe installation structure of this utility model;

[0016] In the diagram: 1. Base; 2. Frame plate; 3. Plastic film feeding conveyor belt; 4. Plastic bag discharging and shaping belt; 5. Hot cutting roller; 6. Hot cutting knife; 7. Lifting cylinder; 8. Lifting seat; 9. Rotating shaft; 10. Rotating handle; 11. Inverted concave knife groove; 12. Cooling air tank; 13. Horizontal air pipe; 14. L-shaped connecting rod; 15. Inverted concave frame; 16. Electric heating tube; 17. Bolt; 18. Locking nut; 19. Air jet; 20. Support plate. Detailed Implementation

[0017] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0018] To address the issues of excessive unnecessary wear and tear on existing hot cutting blades, the inability to flexibly replace blades for raw film of different widths, and the safety hazards posed by high temperatures during blade replacement after prolonged operation, such as… Figure 1 As shown, this application includes a hot cutting machine base 1. Several sets of frame plates 2 are provided on both sides of the upper surface of the base 1. A plastic film feeding conveyor belt 3 and a hot cutting roller 5 are provided between the frame plates 2 at the front, and a plastic bag discharge and shaping belt 4 is provided between the frame plates 2 at the rear. A liftable hot cutting blade 6 is provided above the hot cutting roller 5. Lifting cylinders 7 are installed on both sides of the outer side of the frame plate 2, and a rotating shaft 9 is installed between the lifting seats 8 at the upper end of the lifting cylinders 7. Both sides of the rotating shaft 9 are connected to the lifting seats 8 through rotating bearing seats.

[0019] like Figure 3 As shown, a locking nut 18 is provided on the outer side of the rotating bearing seat, and an inverted concave groove 11 is fixed on the shaft body of the rotating shaft 9. A rectangular through groove is opened on the surface of the inverted concave groove 11. A bolt 17 passes through the rectangular through groove and hot cutting blades 6 of different widths are installed at any position of the inverted concave groove 11 through the bolt 17. Rotating handles 10 are provided on the outer sides of both ends of the shaft body of the rotating shaft 9. The inverted concave groove 11 and the hot cutting blades 6 rotate forward with the rotating shaft 9. An inverted concave frame 15 is provided below the inverted concave groove 11. Several horizontal electric heating tubes 16 are provided in the recessed area of ​​the inverted concave frame 15, and the inverted concave frame 15 is fixed to the inner side of the lifting seat 8 by L-shaped connecting rods 14 on both sides.

[0020] like Figure 4 As shown, a cooling air tank 12 is also provided on the upper surface of the base 1. The cooling air tank 12 is connected to a transverse air pipe 13 through a pipeline. The transverse air pipe 13 is supported by the two side support plates 20 and spans the area above the plastic film discharge shaping belt 4. Several oblique air jet holes 19 are opened on the body of the transverse air pipe 13. The support plates 20 are fixed to the upper surface of the frame plates 2 on both sides.

[0021] Specifically, the cooling gas tank 12 and the electric heating element 16 are both connected to the hot cutting machine control box via control lines, such as... Figure 1 and Figure 2 As shown, the operator can rotate the shaft 9 by turning the handle 10 and limit the angle by locking the nut 18. When the hot cutting blade 6 is rotated to the vertical position, the vertical surface of the hot cutting blade 6 is fitted into the inverted concave frame 15 and is in contact with the electric heating tube 16. When the hot cutting blade 6 is rotated to the horizontal position, the arc-shaped surface of the hot cutting blade 6 is located below several oblique air jet holes 19. At this time, the cooling air tank 12 is activated, and the hot cutting blade 6, which has been separated from the electric heating tube 16, is cooled through the air jet holes 19 to achieve rapid cooling operation, which facilitates disassembly and replacement by the operator and avoids burns. The operator can align and replace the hot cutting blade 6 with the appropriate size according to the width of the plastic film to be hot cut and the transportation position, reducing the unnecessary wear and tear of the hot cutting blade 6.

[0022] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0023] The foregoing has shown and described the basic principles and main features of this utility model, as well as its advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A heat-cutting machine structure for biodegradable plastic packaging bags with replaceable heat-cutting blades, comprising a heat-cutting machine base, wherein several sets of frame plates are provided on both sides of the upper surface of the base, wherein a plastic film feeding conveyor belt and a heat-cutting roller are provided between the frame plates at the front, and a plastic bag discharging and shaping belt is provided between the frame plates at the rear, and a liftable heat-cutting blade is provided above the heat-cutting roller, characterized in that: Lifting cylinders are installed on both sides of the outer side of the frame plate, and a rotating shaft is installed between the lifting seats at the upper end of the lifting cylinders. Both sides of the rotating shaft are connected to the lifting seats through rotating bearing seats, and the outer side of the rotating bearing seats is provided with locking nuts. A concave knife groove is fixed on the shaft body. A rectangular through groove is opened on the surface of the concave knife groove. Bolts pass through the rectangular through grooves, and hot cutting blades of different widths are installed at any position of the concave knife groove through the bolts. Rotating handles are provided on the outer sides of both ends of the rotating shaft body. The concave knife groove and the hot cutting blades rotate forward with the rotating shaft.

2. The structure of a biodegradable plastic packaging bag heat-cutting machine with replaceable heat-cutting blades according to claim 1, characterized in that: The upper surface of the machine base is also provided with a cooling air tank, which is connected to a transverse air pipe through a pipeline. The transverse air pipe is supported by two side support plates and spans the area above the plastic film discharge and shaping belt. Several oblique air jet holes are opened on the body of the transverse air pipe. The support plates are fixed to the upper surface of the frame plates on both sides.

3. The structure of a biodegradable plastic packaging bag heat-cutting machine with replaceable heat-cutting blades according to claim 1, characterized in that: Below the inverted concave knife groove is an inverted concave frame. Inside the concave area of ​​the inverted concave frame are several horizontal electric heating tubes, and the inverted concave frame is fixed to the inner side of the lifting seat by L-shaped connecting rods on both sides.

4. The structure of a biodegradable plastic packaging bag heat-cutting machine with replaceable heat-cutting blades according to claim 3, characterized in that: When the hot cutting blade is rotated to the vertical position, the vertical surface of the hot cutting blade is fitted into the inverted concave frame and is in contact with the electric heating tube. When the hot cutting blade is rotated to the horizontal position, the arc-shaped surface of the hot cutting blade is located below several oblique jet holes.

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