Plastic packaging bag die-cutting machine with good cutting effect

Abstract

The utility model discloses a plastic packaging bag die-cutting machine which is good in cutting effect and comprises a machine frame (1), a horizontal bottom plate (2) is connected to the machine frame (1), and a horizontal pressing plate (3) is arranged above the bottom plate (2). A vertical telescopic cylinder (4) is connected between the top face of the pressing plate (3) and the machine frame (1), one or more guide rods (5) vertically connected to the machine frame (1) are connected to the two sides of the pressing plate (3) in a sliding mode respectively, and a vertically-downward die-cutting knife (6) is fixedly connected to the bottom face of the pressing plate (3). The hardness of the die-cutting rule (6) is 85 to 95 HRC (Rockwell hardness); a base plate (7) is connected to the bottom plate (2), the hardness of the base plate (7) is 60-70 HRC, a zinc coating (8) is arranged on the surface of the base plate (7), and the thickness of the zinc coating (8) is 0.5-2 mm. The cutting device not only can improve the cutting effect, but also has the advantage of being good in durability.

Description

Technical Field

[0001] This utility model relates to the field of die-cutting equipment, and in particular to a die-cutting machine for plastic packaging bags with good cutting effect. Background Technology

[0002] In the packaging bag processing, a die-cutting machine can cut packaging bags from the packaging film after heat sealing. Traditional die-cutting machines generally consist of a base plate, a pressure plate with a guiding mechanism, a die-cutting blade fixed to the bottom of the pressure plate, and a telescopic cylinder connected to the pressure plate. The telescopic cylinder drives the pressure plate to rise and fall relative to the base plate, allowing the die-cutting blade on the bottom to cut the packaging film on the base plate. To prevent the die-cutting blade from damaging the base plate during cutting, a horizontal pad is fixed to the base plate. However, commonly used acrylic or nylon plastic pads are too soft, causing the cut packaging bag to stick to the packaging film, resulting in burrs on the edges of the finished packaging bag. Furthermore, these pads can only withstand about a thousand cuts, exhibiting poor durability. Replacing them directly with a metal plate, on the other hand, easily damages the die-cutting blade, reducing its lifespan.

[0003] Therefore, existing die-cutting machines suffer from poor cutting results and low durability. Utility Model Content

[0004] The purpose of this invention is to provide a die-cutting machine for plastic packaging bags with better cutting results. This invention not only improves the cutting effect but also has the advantage of good durability.

[0005] The technical solution of this utility model is as follows: A plastic packaging bag die-cutting machine with good cutting effect includes a frame, a horizontal base plate connected to the frame, and a horizontal pressure plate above the base plate; a vertical telescopic cylinder is connected between the top surface of the pressure plate and the frame; one or more guide rods vertically connected to the frame are slidably connected to both sides of the pressure plate; a vertically downward die-cutting blade is fixedly connected to the bottom surface of the pressure plate; the hardness of the die-cutting blade is 85-95 HRC; a pad is connected to the base plate, the hardness of the pad is 60-70 HRC, and the surface of the pad is provided with a galvanized layer with a thickness of 0.5-2 mm.

[0006] In the aforementioned plastic packaging bag die-cutting machine with good cutting effect, the die-cutting blade is made of tungsten steel with a hardness of 90HRC; the pad is made of iron with a hardness of 65HRC.

[0007] In the aforementioned die-cutting machine for plastic packaging bags with good cutting effect, the thickness of the galvanized layer is 1mm.

[0008] In the aforementioned plastic packaging bag die-cutting machine with good cutting effect, a composite wood board is glued to the bottom surface of the pressure plate, and the bottom surface of the composite wood board is provided with an installation groove for locking the die-cutting blade; foam strips are glued to both sides of the bottom surface of the composite wood board corresponding to the die-cutting blade, and the bottom surface of the foam strips is located below the bottom surface of the die-cutting blade.

[0009] In the aforementioned plastic packaging bag die-cutting machine with good cutting effect, the distance between the bottom surface of the foam strip and the bottom surface of the die-cutting blade is 1mm.

[0010] In the aforementioned plastic packaging bag die-cutting machine with good cutting effect, the top corner of the die-cutting blade is arc-shaped.

[0011] Compared with existing technologies, this invention selects a die-cutting blade with a hardness of 85-95 HRC and applies a 0.5-2 mm galvanized layer to the surface of a backing plate with a hardness of 60-70 HRC. When the die-cutting blade cuts packaging bags, the hardness of the die-cutting blade, backing plate, and galvanized layer ensures that the packaging bag can be completely cut off from the packaging film when the die-cutting blade strikes the galvanized layer. Simultaneously, the significant hardness difference between the galvanized layer and the die-cutting blade, with the galvanized layer being less hard than the backing plate, causes a degree of deformation in the galvanized layer when the die-cutting blade strikes it, reducing the impact on the die-cutting blade and extending its service life. The galvanized backing plate itself has good strength and is not easily damaged by the die-cutting blade, capable of withstanding tens of thousands of cuts, greatly extending its service life.

[0012] In addition, the die-cutting blade of this utility model is made of tungsten steel with a hardness of 90HRC, which has high strength and good cutting effect; the backing plate is made of iron with a hardness of 65HRC, which has high strength and is not easily damaged; the thickness of the galvanized layer is 1mm, so that when the die-cutting blade cuts on the galvanized layer, the backing plate can provide good rigid support and ensure a good cutting effect.

[0013] A composite wood board is glued to the bottom surface of the pressure plate. The composite wood board has a mounting groove for attaching the die-cutting blade. The shape of the die-cutting blade can be designed and arranged according to the outline of the packaging bag, which improves the installation stability of the die-cutting blade. The top corner of the die-cutting blade is set to be rounded, which can directly cut packaging bags with rounded corners. Foam strips are attached to the composite wood board on both sides of the die-cutting blade, and the bottom surface of the foam strip is located 1mm below the bottom surface of the die-cutting blade. During the cutting process, the foam strip can be pressed on the packaging film for positioning before the die-cutting blade cuts, ensuring a better cutting effect.

[0014] Therefore, this invention not only improves the cutting effect, but also has the advantage of good durability. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the bottom surface of the composite wood panel.

[0017] The markings in the attached diagram are: 1-frame, 2-base plate, 3-pressure plate, 4-telescopic cylinder, 5-guide rod, 6-die-cutting blade, 7-pad plate, 8-galvanized layer, 9-composite wood board, 10-mounting groove, 11-foam strip. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0019] Example. A die-cutting machine for plastic packaging bags with good cutting effect, configured as follows: Figure 1 and 2 As shown, the device includes a frame 1, a horizontal base plate 2 connected to the frame 1, and a horizontal pressure plate 3 above the base plate 2. A vertical telescopic cylinder 4 is connected between the top surface of the pressure plate 3 and the frame 1. One or more guide rods 5, which are vertically connected to the frame 1, are slidably connected to both sides of the pressure plate 3. A vertically downward die-cutting blade 6 is fixedly connected to the bottom surface of the pressure plate 3. The hardness of the die-cutting blade 6 is 85-95 HRC. A pad 7 is connected to the base plate 2. The hardness of the pad 7 is 60-70 HRC. A galvanized layer 8 is provided on the surface of the pad 7. The thickness of the galvanized layer 8 is 0.5-2 mm.

[0020] The die-cutting blade 6 is made of tungsten steel with a hardness of 90 HRC; the pad 7 is made of iron with a hardness of 65 HRC; the galvanized layer 8 has a thickness of 1 mm; a composite wood board 9 is pasted and connected to the bottom surface of the pressure plate 3, and the bottom surface of the composite wood board 9 is provided with a mounting groove 10 for engaging the die-cutting blade 6; foam strips 11 are pasted on both sides of the bottom surface of the composite wood board 9 corresponding to the die-cutting blade 6, and the bottom surface of the foam strips 11 is located below the bottom surface of the die-cutting blade 6; the distance between the bottom surface of the foam strips 11 and the bottom surface of the die-cutting blade 6 is 1 mm; the top corner of the die-cutting blade 6 is arc-shaped.

[0021] Working principle: The hot-sealed packaging film is horizontally guided across the surface of the pad 7. After the pattern on the packaging film surface is aligned with the cutting position, the telescopic cylinder 4 on the frame 1 drives the pressure plate 3 to move downwards towards the base plate 2. The pressure plate 3 is slidably connected to multiple guide rods 5, allowing it to move downwards steadily in a horizontal position until the die-cutting blade 6 on the bottom surface of the pressure plate 3 contacts and presses firmly onto the pad 7. At this point, because the die-cutting blade 6 is made of tungsten steel with a hardness of 90HRC and the pad 7 is made of iron with a hardness of 65HRC, and the surface of the pad 7 is provided with a 1mm zinc plating layer 8, the die-cutting blade 6 can cut complete packaging bags well from the packaging film. Moreover, the zinc plating layer 8 is a metallic coating with high strength, capable of withstanding tens of thousands of cuts, and has good durability.

[0022] A composite wood board 9 is glued to the bottom surface of the pressure plate 3. The composite wood board 9 has a mounting groove 10 for engaging the die-cutting blade 6. The die can be prepared according to the cutting requirements of the packaging bag outline. The die-cutting blade 6 can be set into an arc shape, which can cut the rounded corners of the top corners of the packaging bag. The connection position between the composite wood board 9 and the pressure plate 3 is easy to adjust. Foam strips 11 are glued to the composite wood board 9 on both sides of the die-cutting blade 6, and the bottom surface of the foam strips 11 is located 1mm below the bottom surface of the die-cutting blade 6. During the cutting process, the foam strips 11 can be pressed onto the packaging film for positioning before the die-cutting blade 6 cuts, ensuring a better cutting effect.

Claims

1. A die-cutting machine for plastic packaging bags with good cutting effect, comprising a frame (1), a horizontal base plate (2) connected to the frame (1), a horizontal pressure plate (3) provided above the base plate (2); a vertical telescopic cylinder (4) connected between the top surface of the pressure plate (3) and the frame (1), one or more guide rods (5) vertically connected to the frame (1) slidably connected to both sides of the pressure plate (3), and a vertically downward die-cutting blade (6) fixedly connected to the bottom surface of the pressure plate (3); characterized in that: The die-cutting blade (6) has a hardness of 85-95 HRC; a pad (7) is connected to the base plate (2), the hardness of the pad (7) is 60-70 HRC, and a galvanized layer (8) is provided on the surface of the pad (7), the thickness of the galvanized layer (8) is 0.5-2 mm.

2. The plastic packaging bag die-cutting machine with good cutting effect according to claim 1, characterized in that: The die-cutting blade (6) is made of tungsten steel with a hardness of 90 HRC; the backing plate (7) is made of iron with a hardness of 65 HRC.

3. The plastic packaging bag die-cutting machine with good cutting effect according to claim 1, characterized in that: The thickness of the zinc plating layer (8) is 1 mm.

4. The plastic packaging bag die-cutting machine with good cutting effect according to claim 1, characterized in that: A composite wood board (9) is pasted and connected to the bottom surface of the pressure plate (3). The bottom surface of the composite wood board (9) is provided with an installation groove (10) for snapping on the die-cutting knife (6). Foam strips (11) are pasted on both sides of the bottom surface of the composite wood board (9) corresponding to the die-cutting knife (6). The bottom surface of the foam strips (11) is located below the bottom surface of the die-cutting knife (6).

5. The plastic packaging bag die-cutting machine with good cutting effect according to claim 4, characterized in that: The distance between the bottom surface of the foam strip (11) and the bottom surface of the die-cutting blade (6) is 1 mm.

6. The plastic packaging bag die-cutting machine with good cutting effect according to claim 1, characterized in that: The top corner of the die-cutting blade (6) is arc-shaped.

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