Strip bag filling device

Abstract

A strip bag filling device comprises a forming pipe and a filling pipe, a mounting block is arranged on the forming pipe, the filling pipe is arranged in the mounting block and the forming pipe in a penetrating mode, an inflation component and an exhaust component are arranged on the mounting block, a gap is formed between the outer wall of the filling pipe and the mounting block to form an airflow channel, and the inflation component and the exhaust component are both communicated with the forming pipe through the airflow channel. And the strip bag prototype is filled with the materials through the filling pipe, meanwhile, the filling pipe moves downwards along with the movement of the film materials, and the filling action is completed. Nitrogen can enter the forming pipe through the inflation component and the airflow channel in sequence and sink into the strip bag prototype to make contact with materials to serve as protective gas, air can be extruded to flow upwards and is exhausted through the airflow channel and the exhaust component in sequence, and the oxygen content in the strip bag is reduced. The inflation component and the exhaust component are integrated on the forming pipe through the mounting blocks, the structure is compact, the occupied space is small, the forming pipe can be prevented from deforming, the strip bag forming quality is prevented from being influenced, and the structure is more reasonable.

Description

Technical Field

[0001] The utility model relates to the field of food and drug packaging machinery, in particular to a strip bag filling device. Background Art

[0002] In recent years, strip bag packaging (or simply referred to as strip bags, strip packs) has gradually increased its share in the packaging market due to its low packaging cost, beautiful appearance, and convenience of carrying. As a result, there have been many cases where materials previously packaged in boxes, bottles, etc. have been improved to use strip bag packaging. Different material types and characteristics have continuously raised requirements for strip bag packaging equipment. When customers need to use a single machine to produce strip bags of different materials and at the same time ensure the quality of the materials inside the strip bags (requiring reduction of the oxygen content in the strip bags), the functions of CIP (Clean In Place) and SIP (Sterilize In Place) and nitrogen filling can well meet the requirements of customers.

[0003] Since the traditional longitudinal sealing structure has been determined (the specific principle of longitudinal sealing can be referred to a longitudinal sealing device of a strip packing machine disclosed in the prior application CN214524811U), there is insufficient reserved space. If an independent nitrogen filling mechanism is adopted, it will cause extrusion to the original structure, increasing the overall complexity of the machine, which is not conducive to the simplicity of design and cost control. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a strip bag filling device with a compact structure, less occupied space, and capable of reducing the oxygen content in the strip bags at the same time.

[0005] To solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A strip bag filling device includes a forming tube and a filling tube. An installation block is provided on the forming tube. The filling tube passes through the installation block and the forming tube. An inflation component and an exhaust component are provided on the installation block. A gap is formed between the outer wall of the filling tube and the installation block to form an air flow channel. Both the inflation component and the exhaust component are communicated with the forming tube through the air flow channel.

[0007] As a further improvement of the above technical solution: The upper end of the forming tube is welded to the lower side of the installation block.

[0008] As a further improvement of the above technical solution: A positioning groove is provided on the lower side of the installation block, and the upper end of the forming tube is arranged in the positioning groove.

[0009] As a further improvement of the above technical solution: The inflation component is welded to the installation block.

[0010] As a further improvement of the above technical solution: The exhaust component is threadedly connected to the mounting block.

[0011] As a further improvement of the above technical solution: The inflation component and the exhaust component are relatively arranged on both sides of the filling tube.

[0012] As a further improvement of the above technical solution: The forming tube and the filling tube are vertically arranged, the inflation component is obliquely upward arranged, and the exhaust component is horizontally arranged.

[0013] As a further improvement of the above technical solution: A first seal is provided in the mounting block, and the outer wall of the filling tube abuts against the inner wall of the first seal.

[0014] As a further improvement of the above technical solution: A second seal is provided on the upper side of the mounting block, and a pressing plate for pressing the second seal is provided on the filling tube.

[0015] As a further improvement of the above technical solution: The cross-section of the first seal is Y-shaped.

[0016] Compared with the prior art, the advantages of the present utility model are as follows: In the strip bag filling device disclosed by the present utility model, after the packaging film material is cut into single strips by the film slitting mechanism, each strip of film material wraps the outer wall of the forming tube and moves downward under tension to form a strip bag prototype. After the material enters the filling tube, it is filled into the strip bag prototype through the bottom of the filling tube. At the same time, the filling tube moves downward with the movement of the film material to complete the filling action. Nitrogen can sequentially enter the forming tube through the inflation component and the air flow channel. Since the density of nitrogen is greater than that of air, it can sink into the strip bag prototype to contact the material and act as a protective gas. The air in the strip bag prototype will be squeezed to flow upward and discharged through the air flow channel and the exhaust component in sequence, thereby reducing the oxygen content in the strip bag and meeting the oxygen content standard of the strip bag. The inflation component and the exhaust component are integrated on the forming tube through the mounting block, with a compact structure and less occupied space. And compared with directly opening holes on the forming tube and welding the inflation component and the exhaust component, it is beneficial to avoid deformation of the forming tube, thereby affecting the forming quality of the strip bag, and the structure is more reasonable.

[0017] Other features and advantages of the present utility model will be described in detail in the subsequent specific implementation section. Description of the Drawings

[0018] Figure 1 is a three-dimensional structural schematic diagram of the strip bag filling device of the present utility model.

[0019] Figure 2 is a cross-sectional structural schematic diagram of the strip bag filling device of the present utility model.

[0020] Figure 3 is Figure 2Partial enlarged view.

[0021] Figure 4 It is a schematic three - dimensional structure diagram of the strip - bag filling device of the present utility model installed on the longitudinal sealing device.

[0022] Each label in the figure represents:

[0023] 1. Forming tube; 2. Filling tube; 21. Pressing plate; 3. Mounting block; 31. Air flow channel; 32. Positioning groove; 33. First seal; 34. Second seal; 4. Inflating component; 5. Exhaust component; 6. Film rolling former. Detailed implementation mode

[0024] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present utility model.

[0025] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more unless otherwise specifically defined.

[0026] In the present utility model, unless otherwise clearly defined and limited, terms such as "assembly", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] The present utility model will be further described in detail below in conjunction with the specification drawings and specific embodiments.

[0028] Figures 1 to 4An embodiment of the strip bag filling device of the present utility model is shown. The strip bag filling device of this embodiment includes a forming tube 1 and a filling tube 2. An installation block 3 is provided on the forming tube 1. The filling tube 2 passes through the installation block 3 and the forming tube 1. An inflation component 4 and an exhaust component 5 are provided on the installation block 3. There is a gap between the outer wall of the filling tube 2 and the installation block 3 to form an air flow channel 31. Both the inflation component 4 and the exhaust component 5 are communicated with the forming tube 1 through the air flow channel 31.

[0029] In the strip bag filling device of this embodiment, after the packaging film material is cut into single strips by the film slitting mechanism, each strip of film material wraps around the outer wall of the forming tube 1 and moves downward under tension to form a strip bag prototype. After the material enters the filling tube 2, it is filled into the strip bag prototype through the bottom of the filling tube 2. At the same time, the filling tube 2 moves downward as the film material moves to complete the filling action. Nitrogen can sequentially enter the forming tube 1 through the inflation component 4 and the air flow channel 31. Since the density of nitrogen is greater than that of air, it can sink into the strip bag prototype to contact the material and act as a protective gas. The air in the strip bag prototype will be squeezed to flow upward and discharged through the air flow channel 31 and the exhaust component 5 in sequence, thereby reducing the oxygen content in the strip bag and meeting the oxygen content standard of the strip bag. The inflation component 4 and the exhaust component 5 are integrated on the forming tube 1 through the installation block 3, with a compact structure and less occupied space. And compared with directly opening holes on the forming tube 1 and welding the inflation component 4 and the exhaust component 5, it is beneficial to avoid deformation of the forming tube 1, thereby affecting the strip bag forming quality, and the structure is more reasonable.

[0030] For specific reference Figure 1 、 Figure 2 and Figure 4 In this embodiment, the upper end of the forming tube 1 is welded to the lower side of the installation block 3. The lower side of the installation block 3 is welded to the upper end of the forming tube 1, with reliable connection and avoiding leakage. And the welding position is far from the film forming device 6 of the rolled film, which is beneficial to reducing the influence of welding deformation on the strip bag forming quality.

[0031] Furthermore, in this embodiment, a positioning groove 32 is provided on the lower side of the installation block 3, and the upper end of the forming tube 1 is arranged in the positioning groove 32, which is beneficial to accurately positioning the forming tube 1 and the installation block 3, and at the same time is convenient for welding and fixing the two.

[0032] For specific reference Figure 3 In a preferred embodiment, the inflation component 4 is welded to the installation block 3.

[0033] In a preferred embodiment, the exhaust component 5 is threadedly connected to the installation block 3.

[0034] Further, in this embodiment, the inflation component 4 and the exhaust component 5 are oppositely arranged on both sides of the filling tube 2. Specifically, the inflation component 4 is located on the front side of the filling tube 2, and the exhaust component 5 is located on the rear side of the filling tube 2, which can make full use of the space on both sides of the filling tube 2 to avoid interference and entanglement between the inflation pipeline and the exhaust pipeline (not shown in the figure), and the layout is reasonable and effective.

[0035] As a preferred embodiment, the forming tube 1 and the filling tube 2 are vertically arranged, the inflation component 4 is arranged obliquely upward for convenient connection with the intake pipeline, and the exhaust component 5 is horizontally arranged for convenient connection with the exhaust pipeline at the rear side.

[0036] Specifically refer to Figure 3 , in this embodiment, a first seal 33 is provided in the mounting block 3, and the outer wall of the filling tube 2 abuts against the inner wall of the first seal 33. During the downward movement of the filling tube 2, a dynamic seal is formed between the outer wall of the filling tube 2 and the first seal 33, and gas, cleaning liquid, etc. are prevented from leaking during processes such as nitrogen filling, on-line cleaning, and on-line sterilization.

[0037] Furthermore, in this embodiment, a second seal 34 is provided on the upper side of the mounting block 3, and a pressing plate 21 for pressing the second seal 34 is provided on the filling tube 2. After the filling tube 2 moves downward in place, the pressing plate 21 presses the second seal 34 to achieve static seal. The static seal cooperates with the above-mentioned dynamic seal to ensure that pressure gas, cleaning liquid, etc. are prevented from leaking during on-line cleaning and on-line sterilization processes, and the structure is simple and reliable.

[0038] As a preferred embodiment, the cross-section of the first seal 33 is Y-shaped. The first seal 33 with a Y-shaped cross-section has a large deformation amount and can form a good dynamic seal with the outer wall of the filling tube 2. Of course, in other embodiments, the first seal 33 can also adopt other forms.

[0039] Although the present utility model has been disclosed above with preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make many possible changes and modifications to the technical solution of the present utility model, or modify it into an equivalent embodiment with equivalent changes, without departing from the scope of the technical solution of the present utility model. Therefore, any simple modification, equivalent change, and modification made to the above embodiments according to the technical essence of the present utility model without departing from the content of the technical solution of the present utility model shall fall within the scope of protection of the technical solution of the present utility model.

Claims

1. A stick bag filling device, comprising a forming tube (1) and a filling tube (2), characterized in that: The forming tube (1) is provided with a mounting block (3), the filling tube (2) is inserted through the mounting block (3) and the forming tube (1), the mounting block (3) is provided with an inflation component (4) and an exhaust component (5), a gap is provided between the outer wall of the filling tube (2) and the mounting block (3) to form an air flow channel (31), and the inflation component (4) and the exhaust component (5) are both connected to the forming tube (1) through the air flow channel (31).

2. The strip bag filling device according to claim 1, characterized in that: The upper end of the forming tube (1) is welded to the lower side of the mounting block (3).

3. The strip bag filling device according to claim 2, characterized in that: A positioning groove (32) is provided on the lower side of the mounting block (3), and the upper end of the forming tube (1) is arranged in the positioning groove (32).

4. The strip bag filling device according to claim 1, characterized in that: The inflatable component (4) is connected to the mounting block (3) by welding.

5. The strip bag filling device according to claim 1, characterized in that: The exhaust component (5) is threadedly connected to the mounting block (3).

6. The strip bag filling device according to claim 1, characterized in that: The inflation component (4) and the exhaust component (5) are arranged oppositely on two sides of the filling tube (2).

7. The strip bag filling device according to claim 6, characterized in that: The forming tube (1) and the filling tube (2) are arranged vertically, the inflation component (4) is arranged obliquely upward, and the exhaust component (5) is arranged horizontally.

8. The stick bag filling device according to any one of claims 1 to 7, characterized in that: A first sealing member (33) is provided inside the mounting block (3), and the outer wall of the filling tube (2) abuts against the inner wall of the first sealing member (33).

9. The strip bag filling device according to claim 8, characterized in that: A second sealing member (34) is provided on the upper side of the mounting block (3), and a pressing plate (21) for pressing the second sealing member (34) is provided on the filling tube (2).

10. The strip bag filling device according to claim 8, characterized in that: The cross section of the first sealing member (33) is Y-shaped.

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