Hot edge sealing type small plastic bag

Abstract

The utility model belongs to the technical field of plastic bags, and particularly relates to a hot edge sealing type small plastic bag which comprises an original long plastic barrel, and the evenly-moving original long plastic barrel is thermally cut by a hot cutter assembly to form two cut long plastic barrels. The side face of one end of the segmented long plastic cylinder is provided with a hot cutter cutting line sealing edge left by cutting of the hot cutter assembly, hot melting sealing edges are arranged on the segmented long plastic cylinder at equal intervals, and the segmented long plastic cylinder is provided with point breaking line parts which are the same as the hot melting sealing edges in shape. Two segmented long plastic barrels are formed while an original long plastic barrel is cut, so that the plastic bag production speed can be increased, and plastic bags produced through film blowing can be processed into plastic bags with smaller sizes.

Description

Technical Field

[0001] The utility model belongs to the technical field of plastic bags, and in particular relates to a heat-sealed small plastic bag. Background Art

[0002] At present, when producing plastic flat bags in factories, polyethylene raw materials are placed in a screw extruder, and a long plastic film cylinder is first extruded, and then inflated according to a predetermined circumference. The inflation ratio determines the size and thickness of the film cylinder. The air of the plastic film cylinder is squeezed out and then rolled into a film roll. Half of the circumference of the barrel is the width of a plastic flat bag to be produced. Then the cylinder of the plastic film roll is cut, and the distance between the cut bags is the length of the flat bag. The film is heated and heat-sealed with a hot knife from the cut, and the upper film and the lower film of the plastic film cylinder are bonded together, so that each plastic bag is made: the cut part is the opening and bottom of the produced plastic flat bag, and the width of the plastic flat bag is half of the circumference of the raw plastic cylinder. Such a plastic film cylinder has the following disadvantages: since the diameter of the plastic film cylinder blown out of the film is the width of a plastic bag to be produced, the film blowing diameter, film blowing speed and output are limited; flat-mouth plastic bags with too small width cannot be produced due to the limitation of the inflation ratio. Utility Model Content

[0003] In order to solve the problems raised in the above background technology, the utility model provides a small heat-sealed plastic bag, which can not only improve the speed of producing plastic bags, but also process the plastic bags produced by film blowing into plastic bags of smaller sizes by cutting the original long plastic tube to form two divided long plastic tubes.

[0004] To achieve the above object, the utility model provides the following technical solutions: a small heat-sealed plastic bag, wherein an evenly moving original long-tube plastic tube is heat-cut by a heat-cutting knife assembly to form two divided long-tube plastic tubes;

[0005] The side surface of one end of the split long plastic tube has a hot knife cutting edge seal left by the hot knife assembly, and the split long plastic tube is provided with hot melt edge seals at equal intervals, and the split long plastic tube is provided with a dotted line portion with the same shape as the hot melt edge seal.

[0006] As a preferred embodiment of the heat-edge-sealed small plastic bag of the utility model, the heat-melt sealed edge and the dot-break line portion are both in a straight line shape.

[0007] As a preferred embodiment of the heat-edge-sealed small plastic bag of the utility model, the heat-melt sealed edge and the dotted line portion are both arc-shaped.

[0008] As a preferred embodiment of the heat-sealed small plastic bag of the utility model, the two sides of the opening of the split long plastic tube are pointed, and the bottom of the split long plastic tube is an arc-shaped bottom.

[0009] As a preferred embodiment of the heat-sealed small plastic bag of the utility model, the interval between the heat-melt sealed edge and the dotted line portion is 5 mm.

[0010] Compared with the prior art, the utility model has the beneficial effects of: by cutting the original long plastic tube to form two divided long plastic tubes at the same time, not only the speed of producing plastic bags can be increased, but also the plastic bags produced by film blowing can be processed into plastic bags of smaller sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model from a first perspective;

[0013] Figure 2 For the utility model Figure 1 Schematic diagram of the enlarged structure at A;

[0014] Figure 3 It is a schematic diagram of the overall structure of the utility model from a second viewing angle;

[0015] Figure 4 For the utility model Figure 2 Schematic diagram of the enlarged structure at B;

[0016] Figure 5 This is a schematic diagram of the structure of the straight-line hot-melt edge sealing in the utility model;

[0017] Figure 6 This is a schematic diagram of the structure of the arc-shaped hot-melt edge sealing in the utility model;

[0018] Figure 7 This is a schematic diagram of the plastic bag processing device of the utility model from the first perspective;

[0019] Figure 8 This is a schematic diagram of the plastic bag processing device of the utility model from a second viewing angle;

[0020] Fig. 9 This is a schematic diagram of the internal structure of the plastic bag processing device of the utility model;

[0021] Fig.10 This is a schematic diagram of the structure of the partition plate in the utility model;

[0022] Fig.11 It is a structural schematic diagram of the hot cutting knife assembly in the utility model;

[0023] Fig.12 It is a schematic diagram of the structure of the utility model in which the original long tube plastic tube is divided into two divided long tube plastic tubes;

[0024] Fig.13 It is the circuit diagram of the hot cutter controller in the utility model.

[0025] In the figure:

[0026] 1. Original long plastic tube; 11. Long plastic tube after segmentation;

[0027] 101. Hot knife cutting edge sealing; 102. Hot melt edge sealing; 103. Dot breaking line part; 104. Sharp corner; 105. Curved bottom;

[0028] 2. Hot cutter assembly; 21. Heat insulation mounting frame; 22. Power connection mounting plate; 23. U-shaped cutter head; 24. Hot cutter controller;

[0029] 3. Separator;

[0030] 4. Mounting rod; 5. Mounting bracket; 6. Positioning roller; 7. Steering roller; 8. Leveling roller; 9. Winding roller; 10. Rotating shaft. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] like Figure 1-Figure 6 As shown:

[0033] A heat-sealed small plastic bag, wherein an evenly moving original long-tube plastic tube 1 is heat-cut by a heat-cutting knife assembly 2 to form two divided long-tube plastic tubes 11;

[0034] The side surface of one end of the split long plastic tube 11 has a hot knife cutting edge seal 101 left by the hot knife assembly 2, and the split long plastic tube 11 is evenly spaced with hot melt edge seals 102. The split long plastic tube 11 is provided with a dotted line portion 103 of the same shape as the hot melt edge seal 102.

[0035] In an optional embodiment, the hot melt edge sealing 102 and the dotted line portion 103 are both straight lines.

[0036] In an optional embodiment, the hot-melt edge sealing 102 and the dotted line portion 103 are both arc-shaped.

[0037] In an optional embodiment, the two sides of the opening of the split long plastic tube 11 are sharp corners 104 , and the bottom of the split long plastic tube 11 is an arc-shaped bottom 105 .

[0038] In an optional embodiment, the interval between the hot-melt sealing edge 102 and the dotted line portion 103 is 5 mm.

[0039] In this embodiment, by cutting the original long plastic tube 1 and forming two divided long plastic tubes 11, not only the speed of producing plastic bags can be increased, but also the plastic bags produced by film blowing can be processed into plastic bags of smaller sizes, such as Figure 6 As shown, the opening of the split long plastic tube 11 has sharp corners 104 on both sides, and the bottom of the split long plastic tube 11 is an arc-shaped bottom 105. A plastic bag with this structure can increase the capacity of the plastic bag when the plastic bag is tied. A traditional flat-mouthed plastic bag will occupy a larger area of ​​the plastic bag to achieve the tying when the bag is tied. In this solution, the sharp corners 104 are set to tie the bag, which can reduce the area of ​​the plastic bag occupied by the tying, and the arc-shaped bottom 105 of the plastic bag can provide more volume. In other words, this solution moves the area of ​​the plastic bag that needs to be tied at the opening to the bottom of the plastic bag for use. This solution not only allows the plastic bag to be loaded with more things when it is tied, but also has low production difficulty, fast production speed, and simple structure.

[0040] like Figure 7-Figure 13As shown, the plastic bag production device and the use method of the above scheme are as follows: the original long-tube plastic tube 1, the original long-tube plastic tube 1 moving at a uniform speed is thermally cut by the hot cutter assembly 2 to form two segmented long-tube plastic tubes 11; the hot cutter assembly 2 includes a heat-insulating mounting frame 21, one end of the heat-insulating mounting frame 21 is fixedly connected to an electrical mounting plate 22, and a U-shaped blade head 23 is installed on the outer side of one end of the electrical mounting plate 22, and the two ends of the U-shaped blade head 23 are respectively electrically connected to the OUT-DC end of the hot cutter controller 24; a partition plate 3 is arranged at a position below the U-shaped blade head 23, and the angle between the two inclined surfaces on the outer side of the partition plate 3 is greater than 185 degrees, and the intersection of the two inclined surfaces on the outer side of the partition plate 3 is located between the two segmented long-tube plastic tubes 11; the inner side of the heat-insulating mounting frame 21 is fixedly connected to a mounting rod 4, and the two ends of the mounting rod 4 are fixedly connected to the inner side of one end of the device bracket 5; in an optional embodiment, a fixed The angle α formed between the positioning roller 6, the positioning roller 6 and the partition plate 3 and the original long-tube plastic tube 1 after segmentation is less than 175 degrees; a steering roller 7 is arranged obliquely below the positioning roller 6, a leveling roller 8 is arranged obliquely above the steering roller 7, and a winding roller 9 is arranged obliquely below the leveling roller 8; the positioning roller 6, the steering roller 7, the leveling roller 8 and the winding roller 9 are all rotatably mounted on the device bracket 5 through the rotating shaft 10, and the way how the winding roller 9 rotates is the existing technology. Under the active rotation of the winding roller 9, the winding roller 9 can wind up the segmented long-tube plastic tube 11. While winding up the segmented long-tube plastic tube 11, the segmented long-tube plastic tube 11 can pull and move the original long-tube plastic tube 1. In the process of the original long-tube plastic tube 1 moving at a uniform speed, the U-shaped blade head 23 in the hot cutting knife assembly 2 contacts the original long-tube plastic tube 1. After the U-shaped blade head 23 is connected to the hot cutting knife controller 24, heating can be achieved. The circuit diagram of the hot cutting knife controller 24 is as shown in Fig.13 As shown, after the U-shaped blade 23 is heated, the original long-tube plastic tube 1 can be divided into two halves, and the two halves can be welded together while being heated, and then rolled into two divided long-tube plastic tubes 11. By cutting the original long-tube plastic tube 1 and making the U-shaped blade 23 weld the cut part of the original long-tube plastic tube 1, two divided long-tube plastic tubes 11 can be finally obtained at the same time.

[0041] It should be noted that the circumference of the original long plastic tube 1 should be twice the circumference of the two divided long plastic tubes 11. According to the film blowing speed of the prior art, the output can be twice as much as before.

[0042] like Fig. 9As shown, the angle α formed between the split long-tube plastic tube 11 between the positioning roller 6 and the partition plate 3 and the original long-tube plastic tube 1 is less than 175 degrees. In this way, the split long-tube plastic tube 11 in contact with the partition plate 3 can actively apply pressure to the two inclined surfaces on the outside of the partition plate 3, and the two split long-tube plastic tubes 11 can slide along the two inclined surfaces on the outside of the partition plate 3 to be separated by a certain distance. It should be understood that the distance between the two split long-tube plastic tubes 11 is related to the angle α and the angle between the two inclined surfaces on the outside of the partition plate 3.

[0043] After the two split long plastic tubes 11 are separated by the partition plate 3, the two split long plastic tubes 11 are not in the same plane at this time. Therefore, it is necessary to use the positioning roller 6, the steering roller 7 and the leveling roller 8 to make the two split long plastic tubes 11 finally in the same plane to facilitate the winding and winding of the winding roller 9.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A heat-sealed small plastic bag, comprising an original long plastic tube (1), characterized in that: The uniformly moving original long-tube plastic tube (1) is thermally cut by the thermal cutter assembly (2) to form two divided long-tube plastic tubes (11); The side surface of one end of the split long plastic tube (11) is provided with a hot knife cutting edge seal (101) left by cutting with a hot knife assembly (2), and the split long plastic tube (11) is provided with hot melt edge seals (102) at equal intervals, and the split long plastic tube (11) is provided with a dotted line portion (103) having the same shape as the hot melt edge seal (102).

2. The heat-sealed small plastic bag according to claim 1, characterized in that: The hot-melt sealing edge (102) and the dotted line portion (103) are both in a straight line shape.

3. The heat-sealed small plastic bag according to claim 1, characterized in that: The hot-melt sealing edge (102) and the dotted line portion (103) are both arc-shaped.

4. The heat-sealed small plastic bag according to claim 3, characterized in that: The two sides of the opening of the split long-tube plastic tube (11) are in the shape of sharp corners (104), and the bottom of the split long-tube plastic tube (11) is in the shape of an arc bottom (105).

5. The heat-sealed small plastic bag according to claim 1, characterized in that: The interval between the hot-melt sealing edge (102) and the dotted line portion (103) is 5 mm.

Images