Multi-row strip packaging machine filling method

Abstract

This invention discloses a filling method for a multi-row strip packaging machine, relating to the field of material filling technology. The invention improves the fixed upper horizontal sealing mechanism in the prior art by replacing it with a liftable upper horizontal sealing mechanism. This mechanism alternates with the lower horizontal sealing mechanism to pull the film, enabling continuous output of strip packaging bags. This transforms the intermittent output of strip packaging bags into continuous, uninterrupted output, improving the output efficiency of the strip packaging bags and thus increasing the packaging efficiency of the multi-row strip packaging machine.

Description

Technical Field

[0001] This invention relates to the field of material filling technology, and more specifically to a filling method for a multi-row strip packaging machine. Background Technology

[0002] Multi-row packaging machines are widely used packaging equipment in the packaging machinery industry. They are efficient, stable, and precise packaging machines capable of simultaneously completing multiple packaging tasks, boasting high production efficiency and promising application prospects. Multi-row packaging machines are widely used in the food, pharmaceutical, chemical, and daily chemical industries. Multi-row strip bag packaging machines on the market can fill granules, powders, pills, and liquids, with liquid and powder filling being the most challenging. As production capacity demands increase, customers require higher production speeds and product quality from packaging machines. Multi-row strip bag packaging machines operate at high speeds, averaging 60 cuts per minute. During liquid filling, there is a risk of liquid trapping during horizontal sealing, which affects welding quality, increases the probability of leakage, and reduces product yield. Similarly, during filling and sealing of powder or fine granule multi-row strip bag packaging machines, there is a risk of fine powder not falling promptly, resulting in powder floating and a high probability of powder trapping during horizontal sealing.

[0003] For example, the invention patent application with publication number CN117068493A, publication date November 17, 2023, entitled "Filling Structure and Filling Method for Multi-Row Strip Bag Packaging Machine," discloses a double horizontal sealing mechanism. The upper horizontal sealing mechanism is fixed and its function is to weld the horizontal seal of the strip bag. The lower horizontal sealing mechanism is a welding traction structure that, while pulling the strip bag down, performs a secondary welding on the horizontal seal position welded by the upper horizontal sealing mechanism, ensuring the welding quality of the horizontal seal and preventing leakage of liquid or powder materials. This invention patent ends the filling of the nth segmented bag before the (n+1)th horizontal seal position of the strip bag reaches the upper horizontal sealing mechanism, thereby avoiding material splashing and contamination of the inner wall of the strip bag due to subsequent material filling. This ensures that the inner wall of the strip bag is free of material, thus avoiding the influence of the filling material on the welding of the horizontal seal position, ensuring the welding quality of the horizontal seal, reducing the risk of leakage, improving the pass rate of the horizontal seal welding of the product, and improving the filling accuracy.

[0004] However, the above filling method is intermittent filling. That is, when the upper horizontal seal is welded to the nth horizontal seal position of the strip bag, the strip bag is in a fixed state. It is necessary to wait until the upper horizontal seal completes the nth horizontal seal position of the strip bag before the lower horizontal seal mechanism clamps the (n-1)th horizontal seal position and pulls the film down. This filling method causes the strip bag to be fed intermittently, which reduces its filling efficiency. Summary of the Invention

[0005] To overcome the defects and shortcomings of the existing technology, this invention provides a filling method for a multi-row strip packaging machine. The purpose of this invention is to solve the problem of reduced filling efficiency caused by intermittent pulling of the strip packaging bag in the existing technology. This invention uses an upper horizontal sealing mechanism to weld the nth horizontal seal position of the strip bag while simultaneously pulling the strip packaging bag downwards. At the same time as pulling down the strip packaging bag, material is filled into the nth separator bag. After the upper horizontal sealing mechanism completes welding at the nth horizontal seal position, it releases the nth horizontal seal position and moves upwards. While the upper horizontal sealing mechanism releases the nth horizontal seal position, a lower horizontal sealing mechanism clamps the nLth horizontal seal position, pulling the film downwards while performing a second welding. When the upper horizontal sealing mechanism moves to the (n+1)th horizontal seal position... The upper horizontal sealing mechanism clamps the (n+1)th horizontal sealing position, welds it, and pulls the film downwards. While the upper horizontal sealing mechanism is clamping the (n+1)th horizontal sealing position, the lower horizontal sealing mechanism releases its clamped (nL)th horizontal sealing position and moves upwards to reset. When the (n-L+1)th horizontal sealing position reaches the lower horizontal sealing mechanism, the upper horizontal sealing mechanism releases the (n+1)th horizontal sealing position and moves upwards to reset, while the lower horizontal sealing mechanism clamps the (n-L+1)th horizontal sealing position and pulls the film downwards. The filling of the nth compartment bag ends before the upper horizontal sealing mechanism moves upwards to the (n+1)th horizontal sealing position. This invention achieves continuous film-pulling filling through a liftable upper horizontal sealing mechanism and a liftable lower horizontal sealing mechanism. The strip-shaped packaging bags are continuously conveyed, which can effectively improve filling efficiency. Furthermore, during the downward pulling of the film by the upper horizontal sealing mechanism, the welding time between the upper horizontal sealing mechanism and the packaging film is extended, ensuring the welding effect of the upper horizontal sealing mechanism.

[0006] To address the problems existing in the prior art, the present invention is achieved through the following technical solution.

[0007] This invention provides a filling method for a multi-row strip packaging machine, the method comprising the following steps:

[0008] While welding the nth horizontal seal position of the strip bag using the upper horizontal sealing mechanism, the upper horizontal sealing mechanism moves downward, pulls the strip bag downward, and fills the nth dividing bag with materials at the same time as pulling down the strip bag.

[0009] After the upper horizontal sealing mechanism completes the welding of the nth horizontal sealing position, the upper horizontal sealing mechanism releases the nth horizontal sealing position and moves upward;

[0010] When the upper horizontal sealing mechanism releases the nth horizontal sealing position, the lower horizontal sealing mechanism clamps the nLth horizontal sealing position, where L represents the number of compartment bags between the upper and lower horizontal sealing mechanisms; the lower horizontal sealing mechanism moves downward, and while pulling the film downward, it performs a secondary welding on the nLth horizontal sealing position.

[0011] When the upper horizontal sealing mechanism moves to the (n+1)th horizontal sealing position, it clamps the (n+1)th horizontal sealing position, welds it, and pulls the film downwards while welding; when the upper horizontal sealing mechanism moves to the (n+1)th horizontal sealing position, the filling of the nth separator bag ends, and the lower horizontal sealing mechanism releases the clamped (nL)th horizontal sealing position and moves upwards;

[0012] As the upper horizontal sealing mechanism pulls the film downwards, when the (n-L+1)th horizontal sealing position reaches the lower horizontal sealing mechanism, the upper horizontal sealing mechanism releases the (n+1)th horizontal sealing position and moves upwards, while the lower horizontal sealing mechanism clamps the (n-L+1)th horizontal sealing position, performs secondary welding on it, and pulls the film downwards.

[0013] In a further preferred embodiment, when the filling material is liquid, the filling needle begins filling when the upper horizontal sealing mechanism closes the nth horizontal sealing position of the welded strip bag. The filling nozzle of the filling needle is spaced apart from the liquid surface inside the bag by a first distance. The speed at which the upper horizontal sealing mechanism pulls the film down is synchronized with the speed at which the liquid surface inside the bag increases, so that the liquid surface inside the bag is always spaced apart from the filling nozzle of the filling needle by a first distance.

[0014] In a further preferred embodiment, the filling of the nth segmented bag is completed before the filling nozzle of the filling needle is reached at the (n+1)th horizontal seal position of the strip bag.

[0015] More preferably, the upper horizontal sealing mechanism is controlled to rise and fall by an upper horizontal sealing lifting mechanism, which is used to control the gap between the liquid level in the bag and the filling nozzle of the filling needle when the upper horizontal sealing mechanism moves down.

[0016] More preferably, when the liquid content inside the bag is 50%~80%, the upper horizontal sealing mechanism is welded, the upper horizontal sealing mechanism loosens the nth horizontal sealing position and moves upward, and the remaining liquid content is completed when the lower horizontal sealing mechanism lowers and pulls the film.

[0017] More preferably, the lower horizontal sealing mechanism is controlled to rise and fall by a lower horizontal sealing lifting mechanism. The lower horizontal sealing lifting mechanism is used to control the height of the lower horizontal sealing mechanism and to control the gap between the liquid surface and the filling nozzle of the filling needle when the lower horizontal sealing mechanism moves down.

[0018] In a further preferred embodiment, when the material being filled is solid, the filling needle begins filling the material when the upper horizontal sealing mechanism closes the nth horizontal sealing position of the strip packaging bag. At the same time, the upper horizontal sealing mechanism moves downward to pull the film. When the filling volume reaches 50-80%, the welding of the upper horizontal sealing mechanism is completed. The upper horizontal sealing mechanism then releases the nth horizontal sealing position and moves upward. The remaining filling volume is completed when the lower horizontal sealing mechanism lowers to pull the film. When the lower horizontal sealing mechanism finishes pulling the film, the (n+1)th horizontal sealing position of the strip packaging bag is directly opposite the upper horizontal sealing mechanism, and the upper horizontal sealing mechanism stops moving upward.

[0019] In a further preferred embodiment, when the lower horizontal sealing mechanism clamps the nLth horizontal sealing position of the strip bag and pulls the film downward, a reciprocating cutting mechanism is used to cut the horizontal sealing position at the bottom of the strip bag, and the cutting mechanism is controlled to move downward synchronously with the downward movement of the horizontal sealing position. During the downward movement, the horizontal sealing position is cut, and the cut strip bag is output from the packaging machine.

[0020] In a further preferred embodiment, when the lower horizontal sealing mechanism clamps the strip bag at the nLth horizontal sealing position and pulls the film downward, a rotary cutting mechanism is used to cut the bottommost horizontal sealing position of the strip bag that has moved to the rotary cutting mechanism, and the cut strip bag is output from the packaging machine.

[0021] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0022] 1. This invention improves the fixed upper horizontal sealing mechanism in the prior art into a liftable upper horizontal sealing mechanism. This mechanism alternates with the lower horizontal sealing mechanism to pull the film, enabling continuous output of strip-shaped packaging bags. This changes the intermittent output of strip-shaped packaging bags to continuous, uninterrupted output, improving the output efficiency of the strip-shaped packaging bags and thus increasing the packaging efficiency of multi-row strip packaging machines. Existing intermittent film pulling typically achieves 30-80 cuts per minute, with an average of 50 cuts; the continuous mechanism of this invention can achieve 80-120 cuts per minute, further improving the packaging efficiency of multi-row strip packaging machines.

[0023] 2. On the other hand, the present invention replaces the upper horizontal sealing mechanism with a liftable one, which can change the existing lifting filling needle into a fixed structure, thus avoiding the situation where the material is not conveyed smoothly when the filling needle extends or retracts.

[0024] 3. The cutting mechanism of the present invention is also configured as a liftable structure, which can be adapted to continuously output strip-shaped packaging bags, making it convenient to accurately cut the strip-shaped packaging bags. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the filling process of the multi-row strip packaging machine filling method of the present invention;

[0026] Figure 2 This is a three-dimensional structural diagram of the upper and lower horizontal sealing mechanisms of the multi-row strip packaging machine of the present invention;

[0027] Figure 3 This is a rear-view perspective three-dimensional structural diagram of the upper and lower horizontal sealing mechanisms of the multi-row strip packaging machine of the present invention;

[0028] Reference numerals: 1. Strip bag, 2. Upper horizontal sealing mechanism, 3. Lower horizontal sealing mechanism, 4. Upper horizontal sealing lifting mechanism, 5. Lower horizontal sealing lifting mechanism, 6. Cutting mechanism, 7. Cutting lifting mechanism, 8. Filling needle, 9. Filling nozzle, 10. First distance. Detailed Implementation

[0029] The following are exemplary embodiments of the invention as defined by the claims and their equivalents, taken in conjunction with the accompanying drawings, to aid in a comprehensive understanding. The specific details described herein are to be considered exemplary only and not to limit the scope of the invention. Therefore, those skilled in the art can make various changes and modifications to the embodiments without departing from the scope and spirit of the invention.

[0030] As a preferred embodiment of the present invention, this embodiment provides a filling method for a multi-row strip packaging machine. The purpose of this embodiment is to solve the problem of low packaging efficiency and low output efficiency of strip packaging bags caused by intermittent output of strip packaging bags in the prior art.

[0031] In this embodiment, refer to the appendix to the specification. Figure 1 As shown, a filling method for a multi-row strip packaging machine includes the following steps:

[0032] Refer to the instruction manual appendix Figure 1 As shown in A, B, C, and D, while the upper horizontal sealing mechanism 2 is welding the nth horizontal sealing position of the strip bag 1, the upper horizontal sealing mechanism 2 is moved downward. The upper horizontal sealing mechanism 2 pulls the strip packaging bag downward and fills the nth dividing bag with materials while pulling down the strip packaging bag.

[0033] As per the instruction manual Figure 1 As shown in Figure E, after the upper horizontal sealing mechanism 2 completes the welding of the nth horizontal sealing position, the upper horizontal sealing mechanism 2 releases the nth horizontal sealing position and moves upward;

[0034] When the upper horizontal sealing mechanism 2 releases the nth horizontal sealing position, the lower horizontal sealing mechanism 3 clamps the nLth horizontal sealing position, where L represents the number of compartment bags between the upper horizontal sealing mechanism 2 and the lower horizontal sealing mechanism 3; the lower horizontal sealing mechanism 3 moves downward, and while pulling the film downward, the lower horizontal sealing mechanism 3 performs a secondary welding on the nLth horizontal sealing position.

[0035] like Figure 1 As shown in Figure FG, when the upper horizontal sealing mechanism 2 moves up to the (n+1)th horizontal sealing position, the upper horizontal sealing mechanism 2 clamps the (n+1)th horizontal sealing position and welds it, while simultaneously pulling the film downwards; when the upper horizontal sealing mechanism 2 moves up to the (n+1)th horizontal sealing position, the filling of the nth separator bag ends, and the lower horizontal sealing mechanism 3 releases its clamped (nL)th horizontal sealing position and moves upwards;

[0036] As the upper horizontal sealing mechanism 2 pulls the film downward, when the (n-L+1)th horizontal sealing position reaches the lower horizontal sealing mechanism 3, the upper horizontal sealing mechanism 2 releases the (n+1)th horizontal sealing position and moves upward, while the lower horizontal sealing mechanism 3 clamps the (n-L+1)th horizontal sealing position, performs secondary welding on it, and pulls the film downward at the same time.

[0037] In this embodiment, the value of L is 1, that is, the interval between the lower horizontal sealing mechanism 3 and the upper horizontal sealing mechanism 2 is the length of one strip-shaped packaging bag. According to the order of horizontal sealing of the strip-shaped packaging bag, when the upper horizontal sealing mechanism 2 welds the nth horizontal sealing position of the strip-shaped packaging bag and completes the pulling down of the film, the (n-1)th horizontal sealing position of the strip-shaped packaging bag is exactly opposite to the lower horizontal sealing mechanism 3, and then the lower horizontal sealing mechanism 3 clamps and pulls it down.

[0038] The distance between the upper horizontal sealing mechanism 2 and the lower horizontal sealing mechanism 3 depends on the overall height of the multi-row strip packaging machine. In order to avoid interference between the upper horizontal sealing mechanism 2 and the lower horizontal sealing mechanism 3 during lifting, the distance between the upper horizontal sealing mechanism 2 and the lower horizontal sealing mechanism 3 should be reasonably adjusted.

[0039] In one embodiment of this invention, when the filling material is liquid, the filling needle 8 begins filling when the upper horizontal sealing mechanism 2 closes the nth horizontal seal position of the strip bag 1. The filling nozzle 9 of the filling needle 8 is spaced 10 units away from the liquid surface inside the bag. The downward pulling speed of the upper horizontal sealing mechanism 2 is synchronized with the increase speed of the liquid surface inside the bag, ensuring that the liquid surface inside the bag is always spaced 10 units away from the filling nozzle 9 of the filling needle 8. This avoids material splashing and contamination of the inner wall of the strip bag 1 due to subsequent filling, ensuring that the inner wall of the strip bag 1 is free of material. This avoids the impact of the filling material on the welding of the horizontal seal position, ensures the welding quality of the horizontal seal, reduces the risk of leakage, improves the pass rate of the horizontal seal welding, and improves the filling accuracy.

[0040] Before the (n+1)th horizontal seal position of the strip bag 1 reaches the filling nozzle 9 of the filling needle 8, the filling of the nth compartment bag is completed.

[0041] Refer to the instruction manual appendix Figure 2 and attached Figure 3 As shown, the upper horizontal sealing mechanism 2 is controlled to rise and fall by the upper horizontal sealing lifting mechanism 4. The upper horizontal sealing lifting mechanism 4 is used to control the distance between the liquid level in the bag and the filling nozzle 9 of the filling needle 8 when the upper horizontal sealing mechanism 2 moves down.

[0042] As an example of this embodiment, the upper horizontal sealing lifting mechanism 4 is a combination of a lead screw and nut transmission structure and a servo motor reducer, or a combination of a synchronous belt transmission assembly and a servo motor reducer. When the servo motor reducer rotates forward, it drives the upper horizontal sealing mechanism 2 to rise, and when the servo motor reducer rotates in reverse, it drives the upper horizontal sealing mechanism 2 to fall.

[0043] As an example of this embodiment, when the liquid content in the bag is 50%~80%, the upper horizontal sealing mechanism 2 is welded, the upper horizontal sealing mechanism 2 loosens the nth horizontal sealing position and moves upward, and the remaining liquid content is completed when the lower horizontal sealing mechanism 3 lowers and pulls the film.

[0044] The lower horizontal sealing mechanism 3 is controlled to rise and fall by the lower horizontal sealing lifting mechanism 5. The lower horizontal sealing lifting mechanism 5 is used to control the height of the lower horizontal sealing mechanism 3 and control the gap between the liquid surface and the filling nozzle 9 of the filling needle 8 when the lower horizontal sealing mechanism 3 moves down.

[0045] As an example of this embodiment, please refer to the appendix to the specification. Figure 2 and attached Figure 3 As shown, the lower horizontal sealing lifting mechanism 5 is a combination of a lead screw and nut transmission structure and a servo motor reducer, or a combination of a synchronous belt transmission assembly and a servo motor reducer. When the servo motor reducer rotates forward, it drives the lower horizontal sealing mechanism 3 to rise; when the servo motor reducer rotates in reverse, it drives the lower horizontal sealing mechanism 3 to fall.

[0046] In another embodiment of this invention, when the material being filled is solid, when the upper horizontal sealing mechanism 2 closes the nth horizontal sealing position of the strip packaging bag, the filling needle 8 begins to fill the material. At the same time, the upper horizontal sealing mechanism 2 moves downward to pull the film. When the filling amount reaches 50-80%, the welding of the upper horizontal sealing mechanism 2 is completed. The upper horizontal sealing mechanism 2 then releases the nth horizontal sealing position and moves upward. The remaining filling amount is completed when the lower horizontal sealing mechanism 3 lowers to pull the film. When the lower horizontal sealing mechanism 3 finishes pulling the film, the (n+1)th horizontal sealing position of the strip packaging bag is directly opposite the upper horizontal sealing mechanism 2, and the upper horizontal sealing mechanism 2 stops moving upward.

[0047] As another embodiment of this invention, please refer to the appendix to the specification. Figure 2 and attached Figure 3 As shown, when the lower horizontal sealing mechanism 3 clamps the nLth horizontal sealing position of the strip bag 1 and pulls the film downward, the reciprocating cutting mechanism 6 is used to cut the horizontal sealing position at the bottom of the strip bag 1. The cutting mechanism 6 is controlled to move downward synchronously with the downward movement of the horizontal sealing position, and the horizontal sealing position is cut during the downward movement. The cut strip bag is then output from the packaging machine. In this embodiment, the reciprocating cutting mechanism 6 is driven to move up and down by the cutting lifting mechanism 7, and the reciprocating cutting mechanism 6 is synchronized with the lower horizontal sealing mechanism 3.

[0048] In another embodiment of this invention, when the lower horizontal sealing mechanism 3 clamps the nLth horizontal sealing position of the strip bag 1 and pulls the film downward, the rotary cutting mechanism 6 (not shown in the figure) is used to cut the horizontal sealing position at the bottom of the strip bag 1 that has moved to the rotary cutting mechanism 6, and the cut strip bag is output from the packaging machine.

[0049] Although the inventive concept has been specifically shown and described with reference to exemplary embodiments thereof, those skilled in the art should understand that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the claims.

Claims

1. A filling method for a multi-row strip packaging machine, characterized in that: While welding the nth horizontal seal position of the strip bag (1) using the upper horizontal sealing mechanism (2), the upper horizontal sealing mechanism (2) moves downward, the upper horizontal sealing mechanism (2) pulls the strip bag downward, and while pulling down the strip bag, the material is filled into the nth dividing bag. After the upper horizontal sealing mechanism (2) completes the welding of the nth horizontal sealing position, the upper horizontal sealing mechanism (2) releases the nth horizontal sealing position and moves upward; When the upper horizontal sealing mechanism (2) releases the nth horizontal sealing position, the lower horizontal sealing mechanism (3) clamps the nLth horizontal sealing position, where L represents the number of compartment bags between the upper horizontal sealing mechanism (2) and the lower horizontal sealing mechanism (3); the lower horizontal sealing mechanism (3) moves downward, and while pulling the film downward, the lower horizontal sealing mechanism (3) performs secondary welding on the nLth horizontal sealing position; When the upper horizontal sealing mechanism (2) moves up to the (n+1)th horizontal sealing position, the upper horizontal sealing mechanism (2) clamps the (n+1)th horizontal sealing position, welds it, and pulls the film down at the same time as welding; when the upper horizontal sealing mechanism (2) moves up to the (n+1)th horizontal sealing position, the filling of the nth separator bag ends, and the lower horizontal sealing mechanism (3) releases the clamped (nL)th horizontal sealing position and moves upward; As the upper horizontal sealing mechanism (2) pulls the film downward, when the n-L+1th horizontal sealing position reaches the lower horizontal sealing mechanism (3), the upper horizontal sealing mechanism (2) releases the n+1th horizontal sealing position and moves upward, while the lower horizontal sealing mechanism (3) clamps the n-L+1th horizontal sealing position and pulls the film downward while performing secondary welding on it. When the filling material is liquid, when the upper horizontal sealing mechanism (2) closes the nth horizontal sealing position of the welded strip bag (1), the filling needle (8) starts filling. The filling nozzle (9) of the filling needle (8) is spaced apart from the liquid surface in the bag by a first distance (10). The speed at which the upper horizontal sealing mechanism (2) pulls the film down is synchronized with the speed at which the liquid surface in the bag increases, so that the liquid surface in the bag is always spaced apart from the filling nozzle (9) of the filling needle (8) by a first distance (10). When the lower horizontal sealing mechanism (3) clamps the strip bag (1) at the nLth horizontal sealing position and pulls the film down, the reciprocating cutting mechanism (6) moves to the lowest horizontal sealing position of the strip bag (1) and controls the cutting mechanism (6) to move down synchronously with the downward movement of the horizontal sealing position. During the downward movement, the horizontal sealing position is cut off and the cut strip bag is output from the packaging machine.

2. A method of filling a multi-column strip packer as defined in claim 1, characterized in that: Before the (n+1)th horizontal seal position of the strip bag (1) reaches the filling nozzle (9) of the filling needle (8), the filling of the nth compartment bag is completed.

3. A method of filling a multi-column strip packer as defined in claim 1, characterized in that: The upper horizontal sealing mechanism (2) is controlled to rise and fall by the upper horizontal sealing lifting mechanism (4). The upper horizontal sealing lifting mechanism (4) is used to control the liquid level in the bag body when the upper horizontal sealing mechanism (2) moves down to always be separated from the filling nozzle (9) of the filling needle (8) by a first distance (10).

4. The filling method of a multi-row strip packaging machine as described in claim 1, characterized in that: When the liquid content in the bag is 50%~80%, the upper horizontal sealing mechanism (2) is welded, the upper horizontal sealing mechanism (2) loosens the nth horizontal sealing position and moves upward, and the remaining liquid content is completed when the lower horizontal sealing mechanism (3) lowers and pulls the film.

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