Double-layer packaging bag opening hot melt adhesive bonding device

Abstract

A double-layer packaging bag opening hot melt adhesive bonding device comprises an air cylinder fixing plate and opening air cylinders arranged on the left side and the right side of the air cylinder fixing plate, a middle supporting strip is fixed to the upper portion of the air cylinder fixing plate, and the two ends of the middle supporting strip are each provided with a supporting sliding block sliding along the inclined faces of the two ends of the middle supporting strip. Heating strips driven by a telescopic structure are arranged on the front side and the rear side of the middle supporting strip correspondingly, and when the telescopic structure stretches, the heating surfaces of the front heating strip and the rear heating strip make contact with the front supporting surface and the rear supporting surface of the middle supporting strip and the front supporting surface and the rear supporting surface of the supporting sliding block correspondingly; a vertical packaging bag supporting frame is fixed to the edge of the top of the middle supporting strip. According to the utility model, the gluing part of the opening of the double-layer packaging bag can be flatly opened, so that the opening of the double-layer packaging bag is more attractive after being bonded, and the inner-layer packaging bag and the outer-layer packaging bag can be more sufficiently and firmly bonded at the opening part.

Description

Technical Field

[0001] The utility model relates to a packaging bag processing device, in particular to a double-layer packaging bag opening hot melt adhesive bonding device. Background Art

[0002] A tubular packaging material is a packaging material processed into a cylindrical shape. This type of packaging material can be made of materials such as plastics, papers, fabrics, and rubbers. When in use, a section is cut according to the required length (after sealing one end to make a packaging bag). During packaging, since only the two ends need to be sealed to complete the sealing of the whole bag, the processing procedures are greatly saved, and the usage has been increasing in recent years. In order to improve the protection effect of this type of packaging material, the tubular packaging material is divided into an inner layer and an outer layer, that is, a double-layer tubular packaging material. When the inner layer or the outer layer is damaged, the other layer still plays a protective role. At present, when using a double-layer tubular packaging bag, it is necessary to melt the hot melt adhesive between the openings of the inner and outer bags, so that the inner and outer layer packaging bags are adhered together at the openings to form a whole. Directly using an electric heating strip to heat the opening part is likely to cause the bonding part to be uneven, with wrinkles, and even lead to insecure bonding at the opening part, affecting the subsequent use of the packaging bag. Content of the Utility Model

[0003] In order to solve the above problems, the purpose of the utility model is to provide a double-layer packaging bag opening hot melt adhesive bonding device.

[0004] To achieve the above purpose, the technical solution of the utility model is: a double-layer packaging bag opening hot melt adhesive bonding device, including a cylinder fixing plate and spreading cylinders arranged on the left and right of the cylinder fixing plate. A middle support bar is fixed above the cylinder fixing plate. Support sliders that slide along the inclined surfaces at both ends are respectively arranged at both ends of the middle support bar, and the support sliders are driven to move by the spreading cylinders on each side. Heating strips driven by telescopic structures are respectively arranged on the front and back sides of the middle support bar. When the telescopic structures extend, the heating surfaces of the front and back heating strips respectively contact the middle support bar and the front and back support surfaces of the support sliders. A vertical packaging bag support frame is fixed at the top edge of the middle support bar.

[0005] Further, the support sliders on each side are right-angled triangles, and the hypotenuse contacts the inclined surface. One of the right-angled sides of the support slider is perpendicular to the upper surface of the middle support bar.

[0006] Further, the packaging bag support frame is an inverted U-shaped structure, and both ends are bent inward and fixedly connected to the upper surface of the middle support bar.

[0007] Further, the rear heating strip is fixed at the telescopic end of a horizontal pushing cylinder, and the front heating strip is fixed at the upper end of a rotating swing arm. The lower end of the rotating swing arm is rotatably connected to the upper end of a rotating cylinder, and the upper part above the lower end of the rotating swing arm is rotatably connected to the front side of the cylinder fixing plate.

[0008] Furthermore, the rear side of the cylinder fixing plate is fixedly connected to the front side of the column at the upper end of the fixing bracket.

[0009] With the above settings, the present utility model can evenly expand the glue-applying part of the opening of the double-layer packaging bag, and the support slider is always in contact with the inclined surface during the entire movement process, so as to ensure that the expanded bag opening is always flat. When the telescopic structure extends, the heating surfaces of the front and rear heating strips respectively contact the middle support strip and the front and rear support surfaces of the support slider, so that the glue-applying part of the opening of the double-layer packaging bag is heated and bonded together, which can fully ensure that the glue-applying part of the opening of the double-layer packaging bag is bonded flat and firmly. That is, it can not only make the opening of the double-layer packaging bag more beautiful after bonding, but also make the inner and outer packaging bags more fully and firmly bonded at the opening part. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present utility model will be further described in conjunction with the accompanying drawings.

[0011] Figure 1 is the front view structural schematic diagram of the present utility model;

[0012] Figure 2 is the front view structural schematic diagram of the support slider in the expanded state of the present utility model;

[0013] Figure 3 is the side view structural schematic diagram of the present utility model with the support slider removed. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] As Figures 1-3 shown, a hot melt adhesive bonding device for the opening of a double-layer packaging bag includes a cylinder fixing plate 1 and expanding cylinders 2 arranged on the left and right of the cylinder fixing plate 1. A middle support strip 3 is fixed above the cylinder fixing plate 1. Support sliders 4 that slide along the inclined surfaces 5 at both ends are respectively arranged at both ends of the middle support strip 3, and the support sliders 4 are driven to move by the expanding cylinders 2 on each side. Heating strips 6 driven by a telescopic structure are respectively arranged on the front and rear sides of the middle support strip 3, such as electric heating strips. The heating strip 6 can also be replaced by ultrasonic sealing. Ultrasonic can seal polypropylene and polyethylene materials. When the telescopic structure extends, the heating surfaces of the front and rear heating strips 6 respectively contact the middle support strip 3 and the front and rear support surfaces of the support slider 4. A vertical packaging bag support frame 7 is fixed to the top edge of the middle support strip 3.

[0015] Specifically: The support sliders 4 on each side are right-angled triangles, and the hypotenuse is in contact with the inclined surface 5. One of the right-angled sides of the support slider 4 is perpendicular to the upper surface of the middle support strip 3. The packaging bag support frame 7 is an inverted U-shaped structure, and both ends are bent inward and fixedly connected to the upper surface of the middle support strip 3.

[0016] The heating strip 6 at the rear side is fixed to the telescopic end of the horizontal pushing cylinder 8, and the heating strip 6 at the front side is fixed to the upper end of the rotating swing arm 9. The lower end of the rotating swing arm 9 is rotatably connected to the upper end of the rotating cylinder 10. The upper part above the lower end of the rotating swing arm 9 is rotatably connected to the front side of the cylinder fixing plate 1. The rear side of the cylinder fixing plate 1 is fixedly connected to the front side of the column at the upper end of the fixing bracket 11.

[0017] The working principle of the present utility model: The double-layer packaging bag is buckled upside down on the packaging bag support frame 7. The gluing part of the opening of the double-layer packaging bag is just located at the middle support strip 3. At this time, the expanding cylinder 2 drives the support slider 4 to move obliquely downward. Since the two ends of the middle support strip 3 are respectively provided with support sliders 4 that slide along the inclined surfaces 5 at both ends thereof, each side's support slider 4 is a right triangle, and the hypotenuse contacts the inclined surface 5. Therefore, when the support slider 4 slides along the inclined surface of the middle support strip 3, the support sliders 4 on both sides gradually expand and flatten the opening of the double-layer packaging bag, and the support slider 4 always contacts the inclined surface 5 during the entire movement process, as Figure 2 , so as to ensure that the opened bag mouth is always flat. Then, when the telescopic structure extends, the heating surfaces of the front and rear heating strips 6 respectively contact the middle support strip 3 and the front and rear support surfaces of the support slider 4, so as to heat and bond the gluing part of the opening of the double-layer packaging bag together.

[0018] The above are only the schematic specific embodiments of the present utility model and are not intended to limit the scope of the present utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the present utility model shall fall within the scope of protection of the present utility model.

Claims

1. A double-layer packaging bag opening hot melt adhesive bonding device, comprising a cylinder fixing plate (1) and expanding cylinders (2) arranged on the left and right of the cylinder fixing plate (1), characterized in that: Above the cylinder fixing plate (1), an intermediate support bar (3) is fixed. At both ends of the intermediate support bar (3), support sliders (4) that slide along the inclined surfaces (5) at both ends are provided. Moreover, the support sliders (4) are driven to move by the expansion cylinders (2) on each side. On the front and back sides of the intermediate support bar (3), heating bars (6) driven by telescopic structures are respectively provided. When the telescopic structures extend, the heating surfaces of the front and back heating bars (6) are respectively in contact with the front and back support surfaces of the intermediate support bar (3) and the support sliders (4).

2. The double-layer packaging bag opening hot melt adhesive bonding device according to claim 1, characterized in that: On the top edge of the intermediate support bar (3), a vertical packaging bag support frame (7) is fixed.

3. The double-layer packaging bag opening hot melt adhesive bonding device according to claim 1, characterized in that: The support sliders (4) on each side are right-angled triangles, and the hypotenuse is in contact with the inclined surface (5). One of the right-angled sides of the support slider (4) is perpendicular to the upper surface of the intermediate support bar (3).

4. The double-layer packaging bag opening hot melt adhesive bonding device according to claim 2, characterized in that: The packaging bag support frame (7) is an inverted U-shaped structure, and both ends are bent inward and fixedly connected to the upper surface of the intermediate support bar (3).

5. The double-layer packaging bag opening hot melt adhesive bonding device according to claim 1, characterized in that: The rear heating bar (6) is fixed to the telescopic end of a horizontal pushing cylinder (8), and the front heating bar (6) is fixed to the upper end of a rotating swing arm (9). The lower end of the rotating swing arm (9) is rotatably connected to the upper end of a rotating cylinder (10). Above the lower end of the rotating swing arm (9), it is rotatably connected to the front side of the cylinder fixing plate (1).

6. The double-layer packaging bag opening hot melt adhesive bonding device according to claim 1, characterized in that: The rear side of the cylinder fixing plate (1) is fixedly connected to the front side of the column at the upper end of a fixed bracket (11).

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