Soft-pressure hot-melting mechanism for plastic packaging bag and operation method

Abstract

The invention provides a soft-pressure hot-melting mechanism for a plastic packaging bag and an operation method. Vertical plates are fixed to the two sides of the top of a bottom plate, and a top plate is fixed to the tops of the vertical plates; symmetrically-arranged stand columns are fixed between the bottom plate and the top plate, and a first lifting plate, a second lifting plate and a third lifting plate are sequentially installed on the stand columns from top to bottom in a sliding mode. A lifting power device for driving the first lifting plate to lift is mounted at the top of the top plate; a flexible pressing mechanism is mounted between the first lifting plate and the second lifting plate; an upper hot pressing plate is fixed to the bottom end of the second lifting plate, and a lower hot pressing plate is fixed to the top end of the third lifting plate. And two sides of the first lifting plate and the third lifting plate are connected through a synchronous lifting mechanism. The mechanism can be used for soft pressing and hot melting of a bag opening of a plastic packaging bag, the sealing effect of the bag opening can be well guaranteed by adopting the synchronous symmetrical flexible pressing technological process, the hot melting sealing quality is guaranteed, and then the problem that sealing is not firm due to bag opening sealing breakage or overpressure is effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of packaging and sealing, and in particular to a soft-pressing hot-melt mechanism and an operating method for a plastic packaging bag. Background Art

[0002] The basic structure of the existing plastic bag heat sealing machine mainly adopts a single-head downward pressure heat sealing head structure. The heat sealing head located at the bottom is stationary, and the heat sealing head on the top is pressed manually. Moreover, the downward pressure structure on the top mainly adopts a lever structure. During the downward pressure process, the downward pressure cannot be well controlled. If too much force is applied, it will cause uneven hot melting at the hot melt connection part, which will lead to local hot melt breakage and cause the problem of loose sealing. Summary of the invention

[0003] The present invention provides a soft-pressing hot-melt mechanism and an operating method for a plastic packaging bag. The mechanism can be used for soft-pressing hot-melt at the bag mouth of a plastic packaging bag. By adopting a synchronous symmetrical flexible pressing process, the sealing effect of the bag mouth and the quality of the hot-melt sealing can be well guaranteed, thereby effectively preventing the bag mouth seal from being broken or the seal from being loose due to overpressure.

[0004] In order to realize the above-mentioned technical features, the object of the present invention is achieved as follows: the soft pressure hot melt mechanism of the plastic packaging bag comprises a bottom plate, vertical plates are fixed on both sides of the top of the bottom plate, and a top plate is fixed on the top of the vertical plates; symmetrically arranged columns are fixed between the bottom plate and the top plate, and the first lifting plate, the second lifting plate and the third lifting plate are slidably installed on the columns from top to bottom in sequence; a lifting power device for driving the first lifting plate to rise and fall is installed on the top of the top plate; a flexible clamping mechanism is installed between the first lifting plate and the second lifting plate; an upper hot pressing plate is fixed at the bottom end of the second lifting plate, and a lower hot pressing plate is fixed at the top end of the third lifting plate; the first lifting plate and the third lifting plate are connected on both sides by a synchronous lifting mechanism.

[0005] The bottom end of the column is fixed to the top end of the bottom plate through a bottom sleeve, and the top end of the column is fixed to the bottom end surface of the top plate through a top sleeve.

[0006] The first lifting plate is slidably mounted on the column through a first sleeve; The second lifting plate is slidably mounted on the column through a second sleeve; The third lifting plate is slidably mounted on the column through a third sleeve.

[0007] The lifting power device comprises a lifting cylinder body fixed on the top of the top plate, the piston rod end of the lifting cylinder body is connected to the connecting block through a connecting sleeve, and the bottom end of the connecting block is fixedly connected to the top of the first lifting plate.

[0008] The flexible clamping mechanism includes a guide rod fixed on the top of the second lifting plate, the first lifting plate is slidably mounted on the guide rod through a fourth sleeve, a limiting nut is fixedly installed on the top of the guide rod, and a spring is installed on the guide rod and between the first lifting plate and the second lifting plate.

[0009] The upper hot pressing plate and the lower hot pressing plate are electrically heated and connected to a power source.

[0010] The synchronous lifting mechanism includes a first side plate fixed on the two outer side walls of the first lifting plate, an upper connecting rod is hinged on the outer side of the first side plate, the bottom end of the upper connecting rod is hingedly connected to the top end of the swing arm plate, the center of the swing arm plate is hinged on the inner side wall of the vertical plate through a rotating shaft, the bottom end of the swing arm plate is hingedly connected to the lower connecting rod, the bottom end of the lower connecting rod is hinged on the outer wall of the second side plate, and the second side plate is fixed on the two outer side walls of the third lifting plate.

[0011] The upper connecting rod is hingedly connected to the first side plate through an upper pin shaft, and the lower connecting rod is hingedly connected to the second side plate through a lower pin shaft.

[0012] The rotating arm plate is rotatably connected with the rotating shaft through a bearing.

[0013] The method for using the soft pressing hot melting mechanism of the plastic packaging bag comprises the following steps: Step 1, Placement of packaging bags: The bag opening to be sealed of the packaging bag is set on the upper hot pressing plate and the lower hot pressing plate, and the power supply is started at the same time to heat the upper hot pressing plate and the lower hot pressing plate; Step 2, synchronous rise of the lower hot platen: Start the lifting power device, drive the first lifting plate through the lifting power device, drive the synchronous lifting mechanism through the first lifting plate, synchronously drive the third lifting plate through the synchronous lifting mechanism, and drive the lower hot pressing plate to rise through the third lifting plate; Step 3, flexible pressing of the upper hot pressing plate: The first lifting plate presses down the spring, the spring presses down the second lifting plate, the second lifting plate presses down the upper hot pressing plate, the upper hot pressing plate presses the bag opening tightly against the top of the lower hot pressing plate, thereby achieving hot melt sealing of the bag opening.

[0014] Beneficial effects of the present invention: 1. The hot melt mechanism of the present invention can be used for soft pressure hot melting of the bag mouth of plastic packaging bags. By adopting a synchronous symmetrical flexible pressing process, it can well ensure the sealing effect of the bag mouth and the quality of hot melt sealing, thereby effectively preventing the bag mouth seal from being broken or the seal from being loose due to overpressure.

[0015] 2. The bottom sleeve and the top sleeve ensure smooth sliding of the bottom plate and the top plate.

[0016] 3. The above-mentioned lifting power device can be used to provide hot melt lifting power.

[0017] 4. The flexible pressing mechanism can realize flexible lifting and lowering, and then realize flexible pressing.

[0018] 5. The upper hot pressing plate and the lower hot pressing plate can be heated by the above power supply, thereby ensuring the subsequent hot melting.

[0019] 6. The synchronous lifting mechanism can ensure that during the lifting process of the first lifting plate, the third lifting plate can be synchronously driven to achieve lifting action.

[0020] 7. The upper pin shaft and the lower pin shaft mentioned above can realize smooth rotation of the corresponding upper connecting rod and the lower connecting rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 This is a three-dimensional diagram from the first perspective of the present invention.

[0023] Figure 2 This is a three-dimensional diagram from a second viewing angle of the present invention.

[0024] Figure 3 It is a three-dimensional diagram from the third viewing angle of the present invention.

[0025] Figure 4 It is the front view of the present invention.

[0026] Figure 5 It is a side view of the present invention.

[0027] Figure 6 For the present invention Figure 5 Medium AA view.

[0028] Figure 7 It is a preliminary state diagram during the operation of the present invention.

[0029] Figure 8 It is a diagram of the compaction process during the operation of the present invention.

[0030] Fig. 9 It is a compression diagram during the operation of the present invention.

[0031] In the figure: bottom plate 1, bottom sleeve 2, set screw 3, column 4, third lifting plate 5, second side plate 6, lower hot pressing plate 7, third sleeve 8, synchronous lifting mechanism 9, vertical plate 10, lower pin 11, lower connecting rod 12, swing arm plate 13, rotating shaft 14, upper connecting rod 15, first lifting plate 16, first sleeve 17, first side plate 18, upper pin 19, second sleeve 20, upper hot pressing plate 21, second lifting plate 22, flexible clamping mechanism 23, connecting block 24, connecting sleeve 25, top plate 26, lifting cylinder 27, top sleeve 28, guide rod 29, spring 30, fourth sleeve 31, limit nut 32. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are further described below in conjunction with the accompanying drawings.

[0033] Embodiment 1: like Figure 1-9 As shown, the soft-pressing hot-melt mechanism of the plastic packaging bag comprises a bottom plate 1, and vertical plates 10 are fixed on both sides of the top of the bottom plate 1, and a top plate 26 is fixed on the top of the vertical plates 10; symmetrically arranged columns 4 are fixed between the bottom plate 1 and the top plate 26, and the first lifting plate 16, the second lifting plate 22 and the third lifting plate 5 are slidably installed on the columns 4 from top to bottom in sequence; a lifting power device for driving the first lifting plate 16 to lift and lower is installed on the top of the top plate 26; a flexible pressing mechanism 23 is installed between the first lifting plate 16 and the second lifting plate 22; an upper hot pressing plate 21 is fixed at the bottom end of the second lifting plate 22, and a lower hot pressing plate 7 is fixed at the top end of the third lifting plate 5; the first lifting plate 16 and the third lifting plate 5 are connected on both sides by a synchronous lifting mechanism 9. This hot-melt mechanism can be used for the soft-pressing hot-melt of the bag mouth of the plastic packaging bag. By adopting a synchronous symmetrical flexible pressing process, it can well ensure the sealing effect of the bag mouth and the quality of the hot-melt sealing, thereby effectively preventing the bag mouth seal from being broken or the sealing being loose due to overpressure. During the specific working process, the first lifting plate 16 is driven by the lifting power device, and the synchronous lifting mechanism 9 is synchronously driven by the first lifting plate 16, the third lifting plate 5 is driven by the synchronous lifting mechanism 9, and the second lifting plate 22 is synchronously driven by the flexible pressing mechanism 23, and then the bag opening is sealed by pressing the upper hot pressing plate 21 and the lower hot pressing plate 7.

[0034] Furthermore, the bottom end of the column 4 is fixed to the top of the bottom plate 1 through the bottom sleeve 2, and the top end of the column 4 is fixed to the bottom end surface of the top plate 26 through the top sleeve 28. The bottom sleeve 2 and the top sleeve 28 ensure smooth sliding of the bottom plate 1 and the top plate 26.

[0035] Furthermore, the first lifting plate 16 is slidably mounted on the column 4 through the first sleeve 17 ; the second lifting plate 22 is slidably mounted on the column 4 through the second sleeve 20 ; and the third lifting plate 5 is slidably mounted on the column 4 through the third sleeve 8 .

[0036] Furthermore, the lifting power device includes a lifting cylinder 27 fixed to the top of the top plate 26, the piston rod end of the lifting cylinder 27 is connected to the connecting block 24 through the connecting sleeve 25, and the bottom end of the connecting block 24 is fixedly connected to the top of the first lifting plate 16. The lifting power device can be used to provide hot melt lifting power. During operation, the connecting sleeve 25 is driven by the lifting cylinder 27, the connecting sleeve 25 drives the connecting block 24, and the connecting block 24 drives the first lifting plate 16 to achieve lifting action.

[0037] Furthermore, the flexible clamping mechanism 23 includes a guide rod 29 fixed on the top of the second lifting plate 22, the first lifting plate 16 is slidably mounted on the guide rod 29 through a fourth sleeve 31, a limit nut 32 is fixedly mounted on the top of the guide rod 29, and a spring 30 is installed on the guide rod 29 and between the first lifting plate 16 and the second lifting plate 22. The flexible clamping mechanism 23 can realize flexible lifting and further realize flexible clamping. During operation, the first lifting plate 16 descends, which first drives the spring 30, and the second lifting plate 22 is pressed down by the spring 30, and then the spring 30 realizes flexible downward pressing.

[0038] Furthermore, the upper hot pressing plate 21 and the lower hot pressing plate 7 are electrically heated and connected to a power source. The upper hot pressing plate 21 and the lower hot pressing plate 7 can be heated by the power source to ensure subsequent hot melting.

[0039] Furthermore, the synchronous lifting mechanism 9 includes a first side plate 18 fixed on the two outer side walls of the first lifting plate 16, an upper connecting rod 15 is hinged on the outer side of the first side plate 18, the bottom end of the upper connecting rod 15 is hingedly connected to the top end of the swing arm plate 13, the center of the swing arm plate 13 is hinged on the inner side wall of the vertical plate 10 through the rotating shaft 14, the bottom end of the swing arm plate 13 is hingedly connected to the lower connecting rod 12, the bottom end of the lower connecting rod 12 is hinged on the outer wall of the second side plate 6, and the second side plate 6 is fixed on the two outer side walls of the third lifting plate 5. The above-mentioned synchronous lifting mechanism 9 can ensure that the third lifting plate 5 is synchronously driven to achieve lifting action during the lifting process of the first lifting plate 16. During the working process, the upper connecting rod 15 is driven by the first lifting plate 16, the swing arm plate 13 is driven by the upper connecting rod 15, the lower connecting rod 12 is driven by the swing arm plate 13, and the third lifting plate 5 is driven by the lower connecting rod 12.

[0040] Further, the upper connecting rod 15 is hingedly connected to the first side plate 18 through the upper pin 19, and the lower connecting rod 12 is hingedly connected to the second side plate 6 through the lower pin 11. The upper pin 19 and the lower pin 11 can realize the smooth rotation of the upper connecting rod 15 and the lower connecting rod 12.

[0041] Further, the swing arm plate 13 is rotatably connected to the rotating shaft 14 via a bearing 35. The bearing 35 ensures smooth rotation of the swing arm plate 13.

[0042] Embodiment 2: The method for using the soft pressing hot melting mechanism of the plastic packaging bag comprises the following steps: Step 1, Placement of packaging bags: The bag opening to be sealed of the packaging bag is set on the upper hot pressing plate 21 and the lower hot pressing plate 7, and the power supply is started at the same time to heat up the upper hot pressing plate 21 and the lower hot pressing plate 7; Step 2, synchronous rise of the lower hot pressing plate 7: Start the lifting power device, drive the first lifting plate 16 through the lifting power device, drive the synchronous lifting mechanism 9 through the first lifting plate 16, synchronously drive the third lifting plate 5 through the synchronous lifting mechanism 9, and drive the lower hot pressing plate 7 to rise through the third lifting plate 5; Step 3, flexible downward pressing of the upper hot pressing plate 21: The spring 30 is pressed down by the first lifting plate 16, the second lifting plate 22 is pressed down by the spring 30, and the upper hot pressing plate 21 is pressed down by the second lifting plate 22. The upper hot pressing plate 21 presses the bag opening tightly against the top of the lower hot pressing plate 7, thereby achieving hot melt sealing of the bag opening.

Claims

1. The soft pressing hot melting mechanism of the plastic packaging bag is characterized by: The invention comprises a bottom plate (1), vertical plates (10) are fixed on both sides of the top of the bottom plate (1), and a top plate (26) is fixed on the top of the vertical plate (10); symmetrically arranged vertical columns (4) are fixed between the bottom plate (1) and the top plate (26), and a first lifting plate (16), a second lifting plate (22) and a third lifting plate (5) are slidably mounted on the vertical columns (4) from top to bottom in sequence; a lifting power device for driving the first lifting plate (16) to lift is mounted on the top of the top plate (26); a flexible pressing mechanism (23) is mounted between the first lifting plate (16) and the second lifting plate (22); an upper hot pressing plate (21) is fixed at the bottom end of the second lifting plate (22), and a lower hot pressing plate (7) is fixed at the top end of the third lifting plate (5); and the first lifting plate (16) and the third lifting plate (5) are connected at both sides by a synchronous lifting mechanism (9).

2. The soft-press hot-melt mechanism for plastic packaging bags according to claim 1, characterized in that: The bottom end of the column (4) is fixed to the top end of the bottom plate (1) via a bottom sleeve (2), and the top end of the column (4) is fixed to the bottom end surface of the top plate (26) via a top sleeve (28).

3. The soft-press hot-melt mechanism for plastic packaging bags according to claim 1, characterized in that: The first lifting plate (16) is slidably mounted on the column (4) via a first sleeve (17); The second lifting plate (22) is slidably mounted on the column (4) via a second sleeve (20); The third lifting plate (5) is slidably mounted on the column (4) via a third sleeve (8).

4. The soft-press hot-melt mechanism for plastic packaging bags according to claim 1, characterized in that: The lifting power device comprises a lifting cylinder (27) fixed to the top of the top plate (26); the end of the piston rod of the lifting cylinder (27) is connected to the connecting block (24) via a connecting sleeve (25); and the bottom end of the connecting block (24) is fixedly connected to the top of the first lifting plate (16).

5. The soft-press hot-melt mechanism for plastic packaging bags according to claim 1, characterized in that: The flexible pressing mechanism (23) comprises a guide rod (29) fixed to the top of the second lifting plate (22); the first lifting plate (16) is slidably mounted on the guide rod (29) via a fourth sleeve (31); a limit nut (32) is fixedly mounted on the top of the guide rod (29); and a spring (30) is mounted on the guide rod (29) and between the first lifting plate (16) and the second lifting plate (22).

6. The soft-press hot-melt mechanism for plastic packaging bags according to claim 1, characterized in that: The upper hot pressing plate (21) and the lower hot pressing plate (7) are electrically heated and are connected to a power source.

7. The soft-press hot-melt mechanism for plastic packaging bags according to claim 1, characterized in that: The synchronous lifting mechanism (9) comprises a first side plate (18) fixed on two outer side walls of a first lifting plate (16); an upper connecting rod (15) is hingedly connected to the outer side of the first side plate (18); the bottom end of the upper connecting rod (15) is hingedly connected to the top end of a swing arm plate (13); the center of the swing arm plate (13) is hingedly connected to the inner side wall of the vertical plate (10) through a rotating shaft (14); the bottom end of the swing arm plate (13) is hingedly connected to a lower connecting rod (12); the bottom end of the lower connecting rod (12) is hingedly connected to the outer wall of a second side plate (6); and the second side plate (6) is fixed to the two outer side walls of a third lifting plate (5).

8. The soft-press hot-melt mechanism for plastic packaging bags according to claim 7, characterized in that: The upper connecting rod (15) is hingedly connected to the first side plate (18) via an upper pin shaft (19), and the lower connecting rod (12) is hingedly connected to the second side plate (6) via a lower pin shaft (11).

9. The soft-press hot-melt mechanism for plastic packaging bags according to claim 7, characterized in that: The rotating arm plate (13) is rotatably connected to the rotating shaft (14) via a bearing (35).

10. The method for using the soft-press hot-melt mechanism of the plastic packaging bag according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1, Placement of packaging bags: The bag opening of the packaging bag to be sealed is arranged on the upper hot pressing plate (21) and the lower hot pressing plate (7), and the power supply is simultaneously started to heat the upper hot pressing plate (21) and the lower hot pressing plate (7); Step 2, synchronous rise of the lower hot pressing plate (7): Starting the lifting power device, driving the first lifting plate (16) through the lifting power device, driving the synchronous lifting mechanism (9) through the first lifting plate (16), synchronously driving the third lifting plate (5) through the synchronous lifting mechanism (9), and driving the lower hot pressing plate (7) to rise through the third lifting plate (5); Step 3, flexible downward pressing of the upper hot pressing plate (21): The spring (30) is pressed down by the first lifting plate (16), the second lifting plate (22) is pressed down by the spring (30), the upper hot pressing plate (21) is pressed down by the second lifting plate (22), and the upper hot pressing plate (21) presses the bag opening tightly against the top of the lower hot pressing plate (7), thereby achieving hot-melt sealing of the bag opening.

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