Method for opening a liquid bag in a packaging container

Abstract

The application provides an opening method of a liquid bag in a packaging container, comprising the following steps: step one, providing a folded liquid bag, the transverse and longitudinal dimensions of the folded liquid bag are smaller than those in an unfolded state, and the feeding port and the discharging port are both located at the upper part; step two, providing a packaging container, and conveying the folded liquid bag to the side of the packaging container along a conveying line; step three, horizontally moving the folded liquid bag to the upper part of the packaging container, and making the longitudinal direction of the liquid bag correspond to the longitudinal direction of the packaging container; step four, fixing the position of the feeding port, then clamping the discharging port by using a clamping mechanism, turning the discharging port from a horizontal state to a vertical state, and moving the discharging port downward to a blocking module. The liquid bag is folded to reduce the size, so that the liquid bag can be conveyed into the opening in the upper part of the packaging container, and the feeding port and the discharging port are both located at the upper part, thereby facilitating the identification, positioning and clamping of the feeding port and the discharging port.

Description

Technical Field

[0001] This invention relates to the field of filling and processing, and in particular to a method for opening a liquid bag inside a packaging container. Background Technology

[0002] Liquid filling bags (also called liquid bags) such as Figure 1 As shown, a flat bag body is used, with the inlet 11 located at the top center of the front and the outlet 12 located at the lower right of the back. If the liquid bag is divided into three equal parts horizontally, the inlet 11 and the outlet 12 are located in different divisions (located in the second part 22 and the third part 23, respectively). During the filling process of the liquid bag, the inlet and outlet need to be fixed, with the inlet located at the top and the outlet connected to the lower side. Since the unfolded area of ​​the liquid bag is larger than the top opening of the packaging container, and its length is also longer than the top opening, it is difficult to unfold the liquid bag directly inside the packaging container. Summary of the Invention

[0003] The technical problem to be solved by the embodiments of the present invention is to provide a method for opening a liquid bag inside a packaging container, which enables the liquid bag to be unfolded inside the packaging container.

[0004] To solve the above-mentioned technical problems, the present invention provides a method for opening a liquid bag inside a packaging container. The liquid bag is rectangular in shape, with the inlet located near the top center of the front side of the liquid bag and the outlet located at the lower right side of the back side. When the liquid bag is divided into three equal parts horizontally, the inlet is located in the second middle part, and the outlet is located in the third right part. The packaging container is cuboid, and a sealing module for fixing the outlet is provided at the bottom of one side of the packaging container. This sealing module can be opened to allow the outlet to release liquid. The opening method includes:

[0005] Step 1: Provide a folded liquid bag. The horizontal and vertical dimensions of the folded liquid bag are smaller than the dimensions of the unfolded state, and the inlet and outlet are both located at the top.

[0006] Step 2: Provide a packaging container and transport the folded liquid bag along the conveyor line to the side of the packaging container;

[0007] Step 3: Move the folded liquid bag horizontally above the packaging container, aligning the longitudinal direction of the liquid bag with the longitudinal direction of the packaging container.

[0008] Step 4: Fix the position of the feed inlet, then use the clamping mechanism to clamp the discharge outlet, flip the discharge outlet from a horizontal state to a vertical state, and move the discharge outlet downward to the sealing module.

[0009] In step three, the length direction of the liquid bag refers to the length direction when the liquid bag is placed horizontally and unfolded; and the length direction of the packaging container refers to the direction of the longer side of the packaging container on the horizontal plane.

[0010] In step three, the position of the feeding port on the folded liquid bag is above the center of the packaging container, and the position of the discharging port is close to the side of the blocking module of the packaging container.

[0011] The packaging container is a foldable and unfoldable folding box, and correspondingly, step two of the opening method further comprises:

[0012] Opening the packaging container from the folded state to the unfolded state.

[0013] The folded liquid bag is folded by a liquid bag folding method.

[0014] The liquid bag folding method comprises:

[0015] Step A, folding the first part and the third part outward respectively and stacking them on the second part, so that the discharging port is located on the same side as the feeding port;

[0016] Step B, during the folding of the first part and the third part outward in step A, when the upper part of the feeding port or the discharging port is covered by the bag body, fold the bag body covering the upper part of the feeding port and the discharging port outward to expose the feeding port and the discharging port;

[0017] Step C, folding the bag body folded in step B in a Z-shaped manner to reduce the distance between the feeding port and the discharging port, and keeping the feeding port and the discharging port exposed.

[0018] Optionally, in step A, the first part is first folded outward and stacked on the second part to form a first fold; and correspondingly in step B, the corner of the first part covering the upper part of the feeding port is folded outward in an inclined manner (preferably at an angle of 45 degrees) to expose the feeding port;

[0019] Then, in step A, the third part is folded outward and stacked on the first part to form a second fold.

[0020] Preferably, the corner of the third part between the discharging port and the bottom corner is folded outward in an inclined manner and covers the third part beside the discharging port.

[0021] Optionally, in step A, the third part is first folded outward and stacked on the second part to form a second fold; and correspondingly in step B, the corner of the third part covering the upper part of the feeding port is folded outward in an inclined manner (preferably at an angle of 45 degrees) to expose the feeding port;

[0022] In step A, the first part is folded outwardly on the third part to form a first fold; and in step B, the corners of the first part covering the upper part of the inlet and outlet are folded outwardly in an inclined manner (preferably at an angle of 45 degrees) to expose the inlet and outlet.

[0023] In step C, the folded liquid bag is folded in a Z shape with the inlet on top, or in an inverted Z shape with the outlet on top.

[0024] Further, after step C, the folded liquid bag is folded outwardly near the bottom of the outlet, and the folded part is kept a distance from the outlet, so that the outlet is exposed.

[0025] The present application also provides a folded liquid bag folded according to the above folding method.

[0026] The present application provides a method for opening a liquid bag in a packaging container. The liquid bag is folded to reduce the size, so that the liquid bag can be transported into the opening of the packaging container, and the inlet and outlet are both located at the upper part, so that the inlet and outlet are easily identified, positioned, and clamped. Further, the outlet is positioned in a blocking module, so that the liquid bag can be unfolded in the packaging container, and the liquid bag is not pressed when filled by a filling device. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 FIG. 1 is a schematic diagram of the planar structure of a liquid bag in an embodiment of the present application;

[0028] Figure 2 FIG. 2 is a flowchart of a folding method of a liquid bag in an embodiment of the present application;

[0029] Figure 3 FIG. 3 is a flowchart of a folding method of a liquid bag in an embodiment of the present application;

[0030] Figure 4 FIG. 4 is a schematic diagram of Z-shaped folding in an embodiment of the present application.

[0031] Figure 5 FIG. 5 is a schematic diagram of inverted Z-shaped folding in an embodiment of the present application.

[0032] Figure 6 FIG. 6 is a schematic diagram of a folded liquid bag in an embodiment of the present application.

[0033] Figure 7 FIG. 7 is a schematic diagram of the structure of a packaging container in an embodiment of the present application (open state).

[0034] Figure 8 FIG. 8 is a comparison diagram of a liquid bag and a packaging container.

[0035] Figure 9This is a schematic diagram of a folded liquid bag inside a packaging container.

[0036] In the picture:

[0037] 11-Inlet; 12-Outlet;

[0038] 21 - Part One; 22 - Part Two; 23 - Part Three;

[0039] 31 - First crease; 32 - Second crease. Detailed Implementation

[0040] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0041] This invention provides a method for opening a liquid bag inside a packaging container, combined with Figure 1 As shown, the liquid bag 1 is rectangular in shape. The inlet 11 of the liquid bag is located on the front of the liquid bag 1 near the top center, and the outlet 12 of the liquid bag is located on the lower right side of the back of the liquid bag. When the liquid bag is divided into three equal parts horizontally, the inlet is located in the middle second part 22, and the outlet is located in the right third part 23; combined with Figure 7 As shown, the packaging container 2 is a cuboid. A sealing module 21 for fixing the discharge port is provided at the bottom of one side of the packaging container 2. The sealing module 21 can be opened to allow the discharge port 12 to discharge material.

[0042] The opening method includes:

[0043] Step 1: Provide the folded liquid bag (e.g.) Figure 6 As shown), the folded liquid bag has smaller lateral and longitudinal dimensions than the unfolded state, and both the inlet 11 and outlet 12 are located at the top.

[0044] Step 2: Provide packaging container 2, and transport the folded liquid bag along the conveyor line to the side of the packaging container;

[0045] Step 3, as follows Figure 9 As shown, the folded liquid bag is moved horizontally above the packaging container, and the longitudinal direction of the liquid bag is aligned with the longitudinal direction of the packaging container. This step can be performed using the equipment disclosed in CN114802947A, which is a discharge port clamping mechanism and packaging bag filling system, or other equipment capable of horizontally moving the liquid bag.

[0046] Step 4: Fix the position of the inlet, then use the clamping mechanism to clamp the outlet, flip the outlet from a horizontal position to a vertical position, and move the outlet downwards to the sealing module. This step can be performed using the equipment disclosed in CN114802947A outlet clamping mechanism and packaging bag filling system, or other equipment capable of fixing the inlet and clamping the outlet can be used.

[0047] The present invention provides a method for opening a liquid bag inside a packaging container by folding the liquid bag to reduce its size so that the liquid bag can be transported into the opening at the top of the packaging container, and placing both the inlet and outlet at the top, thereby facilitating the identification, positioning, and clamping of the inlet and outlet. Furthermore, positioning the outlet at the sealing module allows the liquid bag to unfold inside the packaging container, preventing bag compression during filling by the filling equipment.

[0048] In step three, such as Figure 8 As shown, the longitudinal direction of the liquid bag refers to the length direction when the liquid bag is laid out horizontally; the longitudinal direction of the packaging container refers to the direction of the longer side of the packaging container on the horizontal plane.

[0049] In step three, the inlet on the folded liquid bag is positioned above the center of the packaging container, and the outlet is positioned on the side close to the sealing module of the packaging container.

[0050] The packaging container is a foldable, unfoldable box. Correspondingly, step two of the opening method further includes:

[0051] Unfold the packaging container from its folded state to its unfolded state. Opening the container facilitates the placement of the liquid bag inside. The specific opening process depends on the container's structure and can be performed manually or by mechanical equipment.

[0052] The folded liquid bag is formed using a liquid bag folding method. And as... Figures 1-5 As shown, the present invention provides a liquid bag folding method. The inlet 11 of the liquid bag is located at the top center of the front of the liquid bag, and the outlet 12 of the liquid bag is located at the lower right of the back of the liquid bag. When the liquid bag is divided into three equal parts horizontally, the inlet is located in the second part 22, and the outlet is located in the third part 23. The liquid bag folding method includes:

[0053] Step A: Fold the first part 21 and the third part 23 outwards and overlap them on the second part 22 so that the discharge port 12 is located on the same side as the inlet port 11, that is, both the inlet port 11 and the discharge port are located on top, so as to facilitate the identification, positioning and clamping of the inlet port 11 and the discharge port 12 from above.

[0054] Step B, during the folding of the first portion 21 and the third portion 23 outwards in Step A, when the upper part of the inlet port 11 or the outlet port 12 is covered by the bag, the bag covering the upper part of the inlet port 11 and the outlet port 12 is folded outwards, so that the inlet port 11 and the outlet port 12 are exposed.

[0055] Step C, the bag folded in Step B is folded in a Z shape (as shown in Figure 4 ), so that the distance between the inlet port and the outlet port is reduced, and the inlet port and the outlet port are kept exposed.

[0056] Optionally, as shown in Figure 2 , in Step A, the first portion 21 is first folded outwards and pressed on the second portion 22 to form a first fold 31; and correspondingly in Step B, the corner of the first portion 21 covering the upper part of the inlet port 11 is folded outwards at an angle (preferably at an angle of 45 degrees) to expose the inlet port 11.

[0057] Then back to Step A, the third portion 23 is folded outwards and pressed on the first portion 21 to form a second fold 32. At this time, the folded bag forms a strip shape, and from top to bottom, it is the third portion 23, the first portion 21, and the second portion 22.

[0058] Optionally, as shown in , in Step A, the third portion 23 is first folded outwards and pressed on the second portion 22 to form a second fold 32; and correspondingly in Step B, the corner of the third portion 23 covering the upper part of the inlet port 11 is folded outwards at an angle (preferably at an angle of 45 degrees) to expose the inlet port 11.

[0059] Figure 3 Then back to Step A, the first portion 21 is folded outwards and pressed on the third portion 23 to form a first fold 31; and correspondingly in Step B, the corner of the first portion 21 covering the upper part of the inlet port 11 and the outlet port 12 is folded outwards at an angle (preferably at an angle of 45 degrees) to expose the inlet port 11 and the outlet port 12.

[0060] In Step C, the bag is folded in a Z shape with the inlet port 11 on top (as shown in ), or in an inverted Z shape with the outlet port 12 on top. For example

[0061] , the inlet port 11 on top means that the height of the inlet port 11 is higher than the height of the outlet port 12. As shown in Figure 4 , the outlet port 12 on top means that the height of the outlet port 12 is higher than the height of the inlet port 11. Figure 4 Figure 5

[0062] ​Further, after step C, the folded liquid bag is folded outwardly close to the bottom of the discharge port 12, and the folded part is kept a distance from the discharge port 12, so that the discharge port 12 is kept exposed.

[0063] As shown in Figure 6 The present application also provides a folded liquid bag folded according to the above folding method. The liquid bag folded according to the above method has the feeding port 11 and the discharge port 12 on the upper surface and not blocked, and the horizontal and vertical distances between the feeding port and the discharge port are greatly shortened, so that the feeding port and the discharge port are easily identified, positioned and clamped.

[0064] The liquid bag folding method provided by the present application can reduce the footprint of the liquid bag to about 20% of the unfolded area of the liquid bag, and after folding, the feeding port and the discharge port on two different surfaces are turned to the same surface, which not only shortens the straight-line distance between the feeding port and the discharge port, but also greatly shortens the horizontal and vertical distances between the feeding port and the discharge port. The folded liquid bag is folded in a zigzag shape, so that it is also convenient to unfold the liquid bag, and the phenomenon of bag compression caused by incomplete unfolding of the liquid bag during filling does not occur.

[0065] The technical features of the above embodiments can be combined in any way. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations of the technical features do not contradict, they should be considered as the scope of the present application.

[0066] The above embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of the present application. Therefore, the scope of protection of the present application should be subject to the appended claims.

Claims

1. An opening method of a liquid bag in a packaging container, the liquid bag being rectangular in shape, a liquid inlet of the liquid bag being located at a front side of the liquid bag near a top center, a liquid outlet of the liquid bag being located at a lower right side of a back side of the liquid bag, when the liquid bag is horizontally divided into three equal parts, the liquid inlet being located at a second part in the middle, the liquid outlet being located at a third part on the right side; the packaging container being a cuboid, a blocking module for fixing the liquid outlet being provided at a bottom of a side of the packaging container, the blocking module being capable of being opened to allow the liquid outlet to discharge; the opening method comprising: Step one, providing a folded liquid bag, the folded liquid bag being smaller in both horizontal and vertical dimensions than the unfolded state, and the liquid inlet and the liquid outlet being both located at the upper part; Step two, providing the packaging container, and conveying the folded liquid bag to the side of the packaging container along a conveying line; Step three, horizontally moving the folded liquid bag to above the packaging container, and making the lengthwise direction of the liquid bag correspond to the lengthwise direction of the packaging container; Step four, fixing the position of the liquid inlet, then clamping the liquid outlet by a clamping mechanism, and turning the liquid outlet from a horizontal state to a vertical state, and moving the liquid outlet downward to the blocking module; the folded liquid bag being folded by a liquid bag folding method; the liquid bag folding method comprising: Step A, folding the first part and the third part outward respectively, and stacking them on the second part, so that the liquid outlet is located at the same side as the liquid inlet; Step B, during the folding of the first part and the third part outward in operation step A, when the upper part of the liquid inlet or the liquid outlet is covered by the bag body, folding the bag body covering the upper part of the liquid inlet and the liquid outlet outward, so that the liquid inlet and the liquid outlet are exposed; Step C, folding the bag body folded in step B according to a Z-shaped folding, so that the distance between the liquid inlet and the liquid outlet is reduced, and the exposed state of the liquid inlet and the liquid outlet is maintained; in step A, first fold the first part outward and stack it on the second part to form a first fold line; and correspondingly in step B, fold the corner of the first part covering the upper part of the liquid inlet outward in an inclined manner, so that the liquid inlet is exposed; then return to step A, fold the third part outward and stack it on the first part to form a second fold line; fold the corner of the third part between the liquid outlet and the bottom corner outward in an inclined manner, and cover it on the third part beside the liquid outlet; or, in step A, first fold the third part outward and stack it on the second part to form a second fold line; and correspondingly in step B, fold the corner of the third part covering the upper part of the liquid inlet outward in an inclined manner, so that the liquid inlet is exposed; then return to step A, fold the first part outward and stack it on the third part to form a first fold line; and correspondingly in step B, fold the corner of the first part covering the upper part of the liquid inlet and the liquid outlet outward in an inclined manner, so that the liquid inlet and the liquid outlet are exposed; in step C, fold in a positive Z-shaped manner with the liquid inlet on top, or fold in a reverse Z-shaped manner with the liquid outlet on top.

2. The method according to claim 1, wherein in step three, the lengthwise direction of the liquid bag refers to the length direction when the liquid bag is horizontally placed and unfolded; and the lengthwise direction of the packaging container refers to the direction of the longer side of the packaging container on the horizontal plane. ​ 3. The method of claim 1, wherein, in step three, the position of the inlet of the folded liquid bag is above the center of the packaging container, and the position of the outlet is near the side of the packaging container where the blocking module is located.

4. The method of claim 1, wherein, the packaging container is a foldable and unfoldable folding box, and correspondingly, step two of the opening method further comprises: opening the packaging container from the folded state to the unfolded state.

5. The method of claim 1, wherein, after step C is completed, the folded liquid bag is folded outward near the bottom of the outlet, and the folded part is kept a certain distance from the outlet, so that the outlet remains exposed.

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