Powder leakage prevention valve bag for automatic filling machine

Abstract

The utility model discloses a powder leakage prevention valve bag for an automatic filling machine, which comprises a bag body, bag openings are arranged at the top and the bottom of the bag body, the bag openings are formed by bending and sticking a first folding part and a second folding part, the first folding part is positioned above or below the second folding part, and the second folding part is contacted with a reinforcing sealing strip. According to the utility model, powder entering the bag body through the feeding valve port is contacted with the bottom surface of the seamless reinforced sealing strip, so that the powder leakage phenomenon is avoided, and the cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of valve bags, in particular to a leakage-proof powder valve bag for an automatic filling machine. Background Art

[0002] Valve bags, commonly known as paste-bottom bags, are currently popular international packaging bags. They are fed from the top or bottom valve port and use special filling equipment. After filling the materials, they are packed into cubes. The bags are neatly stacked and beautiful. They are environmentally friendly bags. Valve bags are mainly used to package edible powder, chemical powder, fertilizer, synthetic materials, explosives, grain, salt, minerals and other powdered or granular solid materials and flexible items.

[0003] At present, when using valve-mouth paper bags to fill leather powder, due to the characteristics of leather powder, it has water absorption and will liquefy after half an hour when it encounters air. During the filling process of the existing valve bag, the powder enters from the valve port of the valve bag. Since the powder has a certain flow rate, the powder flows in a circular ring after entering the valve bag. During the flow process, dust is easily sprayed out from the gaps at the four corners of the valve bag (especially the two gaps at the top), which will cause powder leakage and pollute the packaging environment. Utility Model Content

[0004] The utility model aims to provide a leak-proof powder valve bag for an automatic filling machine, which solves the above problems in the prior art by arranging a reinforced sealing strip to seal the overlapping part of the first folding part and the second folding part.

[0005] In order to solve the above technical problems, the utility model adopts the following solutions:

[0006] A leak-proof powder valve bag for an automatic filling machine comprises a bag body with bag openings at the top and bottom, the bag openings being formed by bending and pasting a first folding portion and a second folding portion, the first folding portion being located above or below the second folding portion, and the second folding portion being in contact with a reinforced sealing strip.

[0007] Preferably, the first folding portion is provided with a first folding line, the second folding portion is provided with a second folding line, and the width of the reinforced sealing strip is greater than the distance between the first folding line and the second folding line.

[0008] Preferably, the reinforced sealing strip comprises a third folding portion and a fourth folding portion, wherein the third folding portion and the fourth folding portion are provided with a third folding line and a fourth folding line respectively overlapping with the first folding portion and the second folding portion.

[0009] Preferably, the surface of the reinforced sealing strip is coated with environmentally friendly glue and is bonded and fixed to the first folding part and the second folding part.

[0010] Preferably, a folded feed valve port is provided below the reinforced sealing strip, and a bonding line of the feed valve port is located at the bottom.

[0011] Preferably, a waterproof layer is provided on the surface of the reinforced sealing strip away from the second folding portion.

[0012] Preferably, the waterproof layer is a film layer formed by polymerization of metallocene polyethylene.

[0013] The utility model has the beneficial effects: in the utility model, a reinforcing sealing strip having a width greater than the spacing between the first fold line and the second fold line is provided, and environmentally friendly glue is coated on the surface of the reinforcing sealing strip to seal the overlapping portion of the first folding portion and the second folding portion, so that the powder entering the bag body through the feed valve port contacts the bottom surface of the seamless reinforcing sealing strip, thereby avoiding powder leakage, which is conducive to cost saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 3 For this utility model Figure 2 Schematic diagram of the three-dimensional structure of the bag opening;

[0017] Figure 4 It is a schematic diagram of the layered structure of the bag opening of the utility model.

[0018] Figure markings: 1-bag body, 10-bag opening, 2-first folding part, 3-second folding part, 4-reinforced sealing strip, 40-third folding part, 41-fourth folding part, 5-feeding valve opening, 6-first fold line, 7-second fold line, 8-third fold line, 9-fourth fold line. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below in conjunction with the embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0020] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inside", "outside", "front", "back", "top", "bottom", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.

[0021] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "open", "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] Example

[0023] An embodiment of the utility model is a leak-proof powder valve bag for an automatic filling machine, comprising a bag body 1 with a bag opening 10 at the top and bottom, the bag opening 10 being formed by bending and pasting a first folding portion 2 and a second folding portion 3, the first folding portion 2 being located above or below the second folding portion 3, and a reinforcing sealing strip 4 being provided at the overlapping portion of the first folding portion 2 and the second folding portion 3.

[0024] Reference Figures 1 to 4 The valve bag of the utility model is made of kraft paper as a whole, and the top and bottom thereof are both bag openings 10. The bag opening 10 at the top is selected for filling powdered materials, and the bag opening 10 at the bottom is used to cover the bottom, so as to prevent the powdered leather material from leaking from the bottom bag opening 10 when filling through the top bag opening 10. The bag opening 10 is mainly composed of a first folding portion 2 and a second folding portion 3, and the first folding portion 2 and the second folding portion 3 are integrally formed with the bag body 1 and are formed by bending. Therefore, there is no gap between the first folding portion 2, the second folding portion 3 and the longitudinal surface of the bag body 1, so as to prevent the powder from leaking here during filling.

[0025] Specifically, a reinforced sealing strip 4 is further provided in the bag opening 10. The second folding portion 3 is first bent on the surface of the reinforced sealing strip 4, and then the first folding portion 2 is bent, and they are bonded to each other, so that the overlapping portion between the first folding portion 2 and the second folding portion 3 is sealed under the action of the reinforced sealing strip 4. When the leather powder is filled, the powder enters the interior of the bag body 1 through the bottom of the reinforced sealing strip 4, effectively avoiding the leakage of powder from the overlapping portion of the first folding portion 2 and the second folding portion 3, which is conducive to cost saving.

[0026] In some preferred embodiments, the first folding portion 2 is provided with a first folding line 6 , the second folding portion 3 is provided with a second folding line 7 , and the width of the reinforced sealing strip 4 is greater than the distance between the first folding line 6 and the second folding line 7 .

[0027] Reference Figure 1 and Figure 3The first fold line 6 and the second fold line 7 are used to assist in the bending of the first folding portion 2 and the second folding portion 3 to form a seal on the surface of the bag opening 10. The width of the reinforcing sealing strip 4 mainly depends on the distance between the first fold line 6 and the second fold line 7. The width of the reinforcing sealing strip 4 is always greater than the distance between the two. During bonding, the surface of the reinforcing sealing strip 4 always seals the first folding portion 2, the second folding portion 3 and the overlapping portion therebetween.

[0028] In some preferred embodiments, the reinforcing sealing strip 4 includes a third folding portion 40 and a fourth folding portion 41, and the third folding portion 40 and the fourth folding portion 41 are provided with a third folding line 8 and a fourth folding line 9 respectively coinciding with the first folding line 6 and the second line. The surface of the reinforcing sealing strip 4 is coated with environmentally friendly glue to be bonded and fixed to the first folding portion 2 and the second folding portion 3.

[0029] Specifically, refer to Figure 4 The reinforcing sealing strip 4 is bent through the third fold line 8 and the fourth fold line 9. During the bending process, it overlaps with the first folding part 2 and the second folding part 3. Environmentally friendly glue is applied to the area where the reinforcing sealing strip 4 contacts the first folding part 2 and the second folding part 3. At the same time, environmentally friendly glue is applied to the area where the third folding part 40 and the fourth folding part 41 after bending contact with the first folding part 2 and the second folding part 3, so that the overlapping part between the first folding part 2 and the second folding part 3 forms a completely closed area with the reinforcing sealing strip 4, thereby preventing powder leakage from the gap in the overlapping part of the first folding part 2 and the second folding part 3 when feeding powder.

[0030] In some preferred embodiments, a folded feed valve port 5 is provided below the reinforced sealing strip 4 , and a bonding line of the feed valve port 5 is located at the bottom.

[0031] Specifically, refer to Figure 2 and Figure 3 The feed valve port 5 is located below the reinforced sealing strip 4. When dust enters the valve body through the feed valve port 5, the bonding line of the feed valve port 5 is located at the bottom, and there is no gap at the top of the feed valve port 5. The feed valve port 5 is located below the reinforced sealing strip 4. No powder leaks from the top of the bag opening 10 during feeding.

[0032] In some preferred embodiments, the surface of the reinforcing sealing strip 4 away from the second folding portion 3 is provided with a waterproof layer. The waterproof layer is a film layer formed by metallocene polyethylene polymerization. The waterproof layer is provided to prevent water vapor outside the bag opening 10 from entering the bag body 1 during and after the powder filling process, thereby preventing the powder inside the bag body 1 from getting damp.

[0033] When the utility model is used, the feed valve port 5 and the reinforced sealing strip 4 are first placed in the middle part of the valve port, the width of the reinforced sealing strip 4 is greater than the spacing between the first fold line 6 and the second fold line 7, the first folding part 2, the second folding part 3 and the third folding part 40 and the fourth folding part 41 in the reinforced sealing strip 4 are bent according to the first fold line 6 and the third fold line 8, the second fold line 7 and the fourth folding line 9, after folding, the surface of the reinforced sealing strip 4 is fully coated with environmentally friendly glue, so that the surface is sealed with the overlapping part of the first folding part 2 and the second folding part 3, so as to prevent the powder from contacting the bottom surface of the seamless reinforced sealing strip 4 when entering the bag body 1 through the feed valve port 5, so as to avoid powder leakage, which is conducive to cost saving.

[0034] The above is only a preferred embodiment of the utility model and does not limit the utility model in any form. According to the technical essence of the utility model, within the spirit and principles of the utility model, any simple modification, equivalent replacement and improvement made to the above embodiment still falls within the protection scope of the technical solution of the utility model.

Claims

1. A leak-proof powder valve bag for an automatic filling machine, characterized in that: The invention comprises a bag body (1) having bag openings (10) at the top and bottom, the bag opening (10) being formed by bending and pasting a first folding portion (2) and a second folding portion (3), the first folding portion (2) being located above or below the second folding portion (3), a reinforcing sealing strip (4) being provided at the overlapping portion of the first folding portion (2) and the second folding portion (3), the first folding portion (2) being provided with a first folding line (6), the second folding portion (3) being provided with a second folding line, the width of the reinforcing sealing strip (4) being greater than the distance between the first folding line (6) and the second folding line (7), and the surface of the reinforcing sealing strip (4) being coated with environmentally friendly glue and being bonded and fixed to the first folding portion (2) and the second folding portion (3).

2. The leak-proof powder valve bag for an automatic filling machine according to claim 1, characterized in that: The reinforced sealing strip (4) comprises a third folding portion (40) and a fourth folding portion (41), wherein the third folding portion (40) and the fourth folding portion (41) are provided with a third folding line (8) and a fourth folding line (9) respectively overlapping the first folding line (6) and the second folding line (7).

3. The leak-proof powder valve bag for an automatic filling machine according to claim 1, characterized in that: A folded feed valve port (5) is provided below the reinforced sealing strip (4), and a bonding line of the feed valve port (5) is located at the bottom.

4. The leak-proof powder valve bag for an automatic filling machine according to claim 1, characterized in that: The surface of the reinforced sealing strip (4) away from the second folded portion (3) is provided with a waterproof layer.

5. The leak-proof powder valve bag for an automatic filling machine according to claim 4, characterized in that: The waterproof layer is a film layer formed by polymerization of metallocene polyethylene.

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