Filling machine valve bag with double-layer valve port structure

Abstract

The utility model discloses a filling machine valve bag with a double-layer valve port structure, which comprises a bag port positioned at the top of a bag body 1, a valve port with a double-layer structure is arranged in the bag port, the valve port comprises outer layer paper and inner layer paper, and the inner layer paper is annularly rolled on the inner side of the outer layer paper. The outer layer paper is kraft paper, and the inner layer paper is a casting polyethylene film. The top face and the bottom face in the inner layer paper are fused under the heating condition to complete packaging of the valve bag, additional machine packaging and anti-skid protrusions are not needed, transverse and longitudinal tension after stacking is increased, slipping is avoided, and stacking stability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of valve bags, in particular to a filling machine valve bag with a double-layer valve port structure. 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, after filling leather powder with valve mouth paper bags, it needs to be packaged. The existing valve mouth is a single-layer kraft paper structure. Due to the characteristics of leather powder, it is water-absorbent and will liquefy after encountering air for half an hour. It needs to be completely sealed, and existing equipment is difficult to perform automatic packaging. Utility Model Content

[0004] The utility model aims to provide a filling machine valve bag with a double-layer valve port structure. The valve port structure is arranged as a double layer, and the inner layer of paper is fused under heating conditions to achieve automatic packaging, thereby solving the above-mentioned problems existing in the prior art.

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

[0006] A filling machine valve bag with a double-layer valve port structure comprises a bag port located at the top of the bag body, a double-layer valve port is arranged in the bag port, the valve port comprises an outer layer of paper and an inner layer of paper, and the inner layer of paper is ring-wound inside the outer layer of paper.

[0007] Preferably, the outer layer of paper is kraft paper, and the inner layer of paper is cast polyethylene film.

[0008] Preferably, after the valve opening is heated, the top surface and the bottom surface of the inner paper are fused to form a sealing portion.

[0009] Preferably, the outer layer of paper and the inner layer of paper are bonded together by glue.

[0010] Preferably, the bag opening includes a first folding portion and a second folding portion, the first folding portion is located above the second folding portion, and the outer layer of paper is located below the second folding portion.

[0011] Preferably, the length of the overlapping portion formed by the outer layer of paper, the inner layer of paper and the top of the bag body is smaller than the length of the top of the bag body.

[0012] Preferably, the bag body is made of polyethylene material and the outer peripheral surface is provided with regularly arranged anti-slip protrusions.

[0013] Preferably, the anti-slip protrusion is formed by pressing a mold through the inner wall of the bag body toward the outer wall.

[0014] The utility model has the beneficial effects:

[0015] In the utility model, a valve port with a double-layer structure is arranged in the bag mouth, and the valve port is composed of an outer paper and an inner paper. The inner circumference of the outer paper and the outer circumference of the inner paper are fixedly connected by adhesive to form an annular structure. At the same time, the inner paper is a cast polyethylene film. When packaging is required after filling, it is only necessary to heat the outer paper, so that the top and bottom surfaces of the inner paper are fused to complete the packaging of the valve bag. No additional machine packaging is required. At the same time, the inner paper can effectively prevent the leather powder in the bag body from getting damp after packaging. The inner wall of the bag body is pressed against the outer wall to form an anti-slip bulge, which increases the horizontal and vertical pulling force after stacking, avoids slipping, and has high stacking stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a structural schematic diagram of the valve port of the utility model;

[0018] Figure 3 This is a cross-sectional view of the valve port of the utility model after bonding;

[0019] Figure 4 This is a cross-sectional view of the sealing portion formed after heating of the utility model;

[0020] Figure 5 It is a schematic diagram of the anti-slip protrusions pressed on the bag body of the utility model.

[0021] Figure numerals: 1-bag body, 10-bag opening, 2-first folding part, 3-second folding part, 4-valve opening, 40-outer layer of paper, 41-inner layer of paper, 42-sealing part, 5-anti-slip protrusion. DETAILED DESCRIPTION

[0022] 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.

[0023] 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.

[0024] 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.

[0025] Example

[0026] The embodiment of the utility model is a filling machine valve bag with a double-layer valve port structure, including a bag port 10 located at the top of a bag body 1, a double-layer valve port 4 is arranged in the bag port 10, and the valve port 4 includes an outer paper 40 and an inner paper 41, and the inner paper 41 is wound around the inner side of the outer paper 40. The outer paper 40 is kraft paper, and the inner paper 41 is a cast polyethylene film. After the valve port 4 is heated, the top surface and the bottom surface of the inner paper 41 are fused to form a sealing portion 42.

[0027] In this application, reference is made to Figures 1 to 5 The existing single valve port 4 is designed as a double-layer structure valve port 4, the double-layer structure includes an outer paper 40 and an inner paper 41, wherein the inner paper 41 is coiled on the inner side of the inner paper 41 and serves as the main feeding channel, while the outer paper 40 surrounds the inner paper 41 and is located below the bag opening 10 for fixed connection, the fixed connection can be achieved by gluing or other methods, which can be selected according to actual conditions, so as to prevent the powder from the valve port 4 from leaking to the bag opening 10 during the feeding process.

[0028] At the same time, since the inner paper 41 is specifically a cast polyethylene film, i.e., CPP film, it has the characteristics of light weight, high transparency, good flatness, good rigidity, strong mechanical adaptability, excellent heat sealing, moisture resistance and heat resistance, good smoothness, high film-making speed, uniform thickness, moisture resistance, oil resistance, heat resistance and cold resistance, easy heat sealing, etc. After the leather powder is added, according to the characteristics of the cast polyethylene film itself, the upper and lower surfaces of the outer film are heated, so that the top and bottom surfaces of the inner paper 41 are fused due to the high temperature, and finally the packaging here is completed, realizing automatic packaging without re-packaging; and the cast polyethylene film has better moisture resistance, which prevents the leather powder in the bag body 1 from getting damp.

[0029] According to actual needs, multiple packaging lines (not shown in the figure) can be set on the outer peripheral surface after the outer layer of paper 40 is enclosed, and the placement of the heating clamp is assisted according to the packaging lines, so that the inner layer of paper 41 forms a sealing part 42 according to the packaging lines, so that the position of the sealing part 42 is unified.

[0030] In some preferred embodiments, the outer layer of paper 40 and the inner layer of paper 41 are bonded together by glue.

[0031] Specifically, the outer paper 40 and the inner paper 41 are bonded to form an annular structure without any gap between them, so that when feeding, the material directly enters the bag body 1 from the annular space formed by the inner paper 41, and avoids entering between the outer paper 40 and the inner paper 41, resulting in waste of powder.

[0032] In some preferred embodiments, the bag opening 10 includes a first folding portion 2 and a second folding portion 3 , the first folding portion 2 is located above the second folding portion 3 , and the outer layer of paper 40 is located below the second folding portion 3 .

[0033] Specifically, the bag opening 10 is fixed mainly by bending and bonding the first folding portion 2 and the second folding portion 3. The second folding portion 3 is located below the first folding portion 2, so that the outer layer of paper 40 is located below the second folding portion 3 after being enclosed. The overlapping portion formed by the outer layer of paper 40 on both sides can be provided with a bonding portion to fix and bond the overlapping portion of the second folding portion 3 and the first folding portion 2 to avoid a gap between the outer layer of paper 40 and the second folding portion 3, thereby preventing feeding influence.

[0034] In some preferred embodiments, the length of the overlapped portion formed by the outer paper 40 and the inner paper 41 with the top of the bag body 1 is less than the length of the top of the bag body 1. A part of the whole formed by the outer paper 40 and the inner paper 41 is located inside the top of the bag body 1, which is used to transfer the powder in the filling machine to the inside of the bag body 1, and a part is located outside the top of the bag body 1, which is used to connect with the filling machine. Therefore, the part of the whole formed by the outer paper 40 and the inner paper 41 that overlaps with the top of the bag body 1 is less than the length of the top of the bag body 1 itself, and the center position is optimal, so that the powder inside the valve port 4 can be filled from the middle position of the top of the bag body 1 and directly fall to the inner bottom of the bag body 1.

[0035] In some preferred embodiments, the bag body 1 is made of polyethylene material and has regularly arranged anti-skid protrusions 5 on its outer circumference. The anti-skid protrusions 5 are formed by pressing a mold through the inner wall of the bag body 1 toward the outer wall. Figure 5 The bag body 1 is made of polyethylene material, and the anti-slip protrusions 5 formed on its surface are mainly pressed from the inner wall of the bag body 1 to the outer wall using a mold. Since the polyethylene material has a certain elastic deformation ability, it is pressed on its inner wall, so that a protrusion is formed from the inner wall to the outer wall. This protrusion has no cracks, which prevents powder leakage during filling, and prevents insufficient horizontal and vertical tension after packaging and stacking, thereby avoiding the problem of slipping.

[0036] The utility model mainly sets a valve port 4 with a double-layer structure in the bag mouth 10. The valve port 4 is composed of an outer paper 40 and an inner paper 41. The inner circumference of the outer paper 40 and the outer circumference of the inner paper 41 are fixedly connected by adhesive to form an annular structure. At the same time, the inner paper 41 is a cast polyethylene film. When packaging is required after filling, it is only necessary to heat the outer paper 40, so that the top and bottom surfaces of the inner paper 41 are thermally fused to complete the packaging of the valve port 4 bag. No additional machine packaging is required. At the same time, the inner paper 41 can effectively prevent the leather powder in the bag body 1 from getting wet after packaging. The inner wall of the bag body 1 is pressed toward the outer wall by a mold to form an anti-slip protrusion 5, which increases the horizontal and vertical pulling force after stacking to avoid slipping, and the stacking stability is high.

[0037] 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 filling machine valve bag with a double-layer valve port structure, characterized in that: The bag comprises a bag opening (10) located at the top of the bag body (1), a valve opening (4) with a double-layer structure is arranged inside the bag opening (10), the valve opening (4) comprises an outer layer of paper (40) and an inner layer of paper (41), and the inner layer of paper (41) is rolled up inside the outer layer of paper (40).

2. The filling machine valve bag with a double-layer valve port structure according to claim 1, characterized in that: The outer layer of paper (40) is kraft paper, and the inner layer of paper (41) is a cast polyethylene film.

3. The filling machine valve bag with a double-layer valve port structure according to claim 2, characterized in that: After the valve port (4) is heated, the top surface and the bottom surface of the inner paper (41) are fused to form a sealing portion (42).

4. The filling machine valve bag with a double-layer valve port structure according to claim 2, characterized in that: The outer layer of paper (40) and the inner layer of paper (41) are bonded together by glue.

5. The filling machine valve bag with a double-layer valve port structure according to claim 2, characterized in that: The bag opening (10) comprises a first folding portion (2) and a second folding portion (3), wherein the first folding portion (2) is located above the second folding portion (3), and the outer layer of paper (40) is located below the second folding portion (3).

6. The valve bag for a filling machine with a double-layer valve port structure according to claim 2, characterized in that: The length of the overlapping portion formed by the outer layer of paper (40) and the inner layer of paper (41) and the top of the bag body (1) is smaller than the length of the top of the bag body (1).

7. The valve bag for a filling machine with a double-layer valve port structure according to claim 2, characterized in that: The bag body (1) is made of polyethylene material and has regularly arranged anti-slip protrusions (5) on its outer peripheral surface.

8. The valve bag for a filling machine with a double-layer valve port structure according to claim 7, characterized in that: The anti-slip protrusion (5) is formed by pressing a mold through the inner wall of the bag body (1) toward the outer wall.

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