CN113428719A - Straight cylinder type plastic bag folding and pressing device - Google Patents
Straight cylinder type plastic bag folding and pressing device Download PDFInfo
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- CN113428719A CN113428719A CN202110755127.4A CN202110755127A CN113428719A CN 113428719 A CN113428719 A CN 113428719A CN 202110755127 A CN202110755127 A CN 202110755127A CN 113428719 A CN113428719 A CN 113428719A
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- plastic bag
- plate
- folding
- supporting plate
- screw rod
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H45/00—Folding thin material
- B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
- B65H45/16—Rotary folders
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Abstract
The invention discloses a straight cylinder type plastic bag folding and pressing device which comprises a plastic bag roller, a plastic bag conveying device, a plastic bag opening device, a plastic bag folding and pressing device and a workbench. The plastic bag roller is provided with a rotating shaft which is connected with a bearing and fixed on the workbench. The plastic bag conveying device is provided with an extrusion mechanism and a conveying mechanism. The extrusion mechanism utilizes the extrusion roller to extrude and convey the plastic bags, and the conveying mechanism utilizes the flat belt to convey. The plastic bag opening device adopts a vacuum chuck to realize automatic opening of the plastic bag. The plastic bag folding and pressing device repeatedly extrudes and turns the opened plastic bag inwards through 180-degree turning of the folding plate, and the plastic bag is folded. The folding device is particularly used for realizing small-amplitude continuous folding of the straight-tube type plastic bag, and adopts a production mode of a production line, so that the folding device is safe, sanitary, efficient, convenient and neat in folding.
Description
Technical Field
The invention relates to the field of plastic bag processing equipment, in particular to a straight cylinder type plastic bag folding and pressing device.
Background
Plastic bags are bags made of plastic as a main raw material, are essential articles in daily life, are often used for containing other articles, and are widely used due to the advantages of low price, extremely light weight, large capacity and convenience in storage.
Most of the plastic bag folding and pressing devices generally adopt a mode of repeatedly folding two ends. However, for the straight-tube plastic bag, if the method is still adopted for folding, the plastic bag is not easy to draw and use, and the manual folding is time-consuming and labor-consuming, and the folding integrity and consistency cannot be guaranteed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a straight cylinder type plastic bag folding and pressing device, which solves the problem that the existing plastic bag folding and pressing device cannot be repeatedly folded along the axial direction within a small amplitude range.
In order to achieve the purpose, the invention is realized by the following technical scheme: a straight cylinder type plastic bag folding and pressing device. Comprises a roller plastic bag, a plastic bag conveying device, a plastic bag opening device, a plastic bag folding and pressing device and a workbench. The plastic bag roller is provided with a rolling rotating shaft for winding the plastic bag, and the plastic bag is continuously supplied by rotating the rolling rotating shaft. T-shaped bearing seats are arranged at two ends of the rolling rotating shaft and fixed on the workbench.
Furthermore, the plastic bag conveying device is provided with mutually meshed extrusion rollers, two ends of each extrusion roller are provided with a circular flange type bearing seat, one end of each extrusion roller is connected with the first supporting frame, the other end of each extrusion roller is connected with the second supporting frame, the first supporting frame is connected with the first driving motor and the second driving motor through bolts and fixed on the workbench together, the plastic bags are clamped and conveyed by utilizing the reverse movement of the first driving motor and the second driving motor, and the clamped plastic bags move forwards to enter the plastic bag conveying device. The plastic bag conveying device is provided with a flat belt for conveying plastic bags continuously, two rotating shafts are distributed in the flat belt, two ends of each rotating shaft are connected with two cutting circular flange type bearing seats, the two cutting circular flange type bearing seats are fixed on a first supporting frame and a second supporting frame respectively, and a third driving motor is mounted on the third supporting frame and fixed on a workbench together with a fourth supporting frame. The upper cover plate and the two cutting circular flange type bearing seats are connected above the third supporting frame and the fourth supporting frame through screws. The plastic bags are conveyed between the flat belt and the upper cover plate.
Furthermore, the plastic bag opening device is symmetrically distributed with an upper supporting plate and a lower supporting plate, sliding grooves are arranged on the left side and the right side of the upper supporting plate and the lower supporting plate, and the sliding grooves, the fifth supporting frame and the sixth supporting frame form sliding guide rails. The upper supporting plate and the lower supporting plate are connected with the two sliding blocks in the upper and lower screw rod sliding rails, and the upper supporting plate and the lower supporting plate move oppositely through the rotation of the motors in the upper and lower screw rod sliding rails. And the upper supporting plate and the lower supporting plate are internally provided with vacuum suckers, the plastic bag is sucked by using the vacuum suckers, and the plastic bag is opened in the opposite movement process of the upper supporting plate and the lower supporting plate.
Furthermore, the plastic bag folding and compressing device is provided with four folding plates in symmetrical distribution in space, one end of each folding plate is provided with a synchronous gear, and the synchronous gear and a rotating motor arranged on the fixed frame are in belt transmission through a synchronous belt, so that the folding plates are turned inwards by 180 degrees on the fixed frame. The fixing frame is arranged on the first movable plate, and the first movable plate is connected with the first front and rear screw rod slide rails to realize the front and rear movement of the folding plate. The middle part of the first moving plate is a hollow square, the first tightening plate and the second tightening plate penetrate through the first moving plate, the first tightening plate and the second tightening plate are connected with the left screw rod slide rail and the right screw rod slide rail, and the two slide blocks on the left screw rod slide rail and the right screw rod slide rail are used for realizing the opposite or opposite movement of the tightening plates. The first tightening plate and the second tightening plate are fixed in a second moving plate, and the second moving plate is connected with a second front-back screw rod sliding rail.
A straight cylinder type plastic bag folding and pressing method comprises the following steps:
step 001, clamping a plastic bag: one end port of the plastic bag on one side of the roller is wound on the rolling rotating shaft, the other end port of the plastic bag on the other side of the roller is placed in the squeezing roller, the first driving motor and the second driving motor move in opposite directions to drive the mutually meshed squeezing roller to rotate, and the plastic bag is continuously pressed in the squeezing roller and continuously moves forwards;
step 002, conveying of plastic bags: after being clamped, the plastic is placed between the flat belt and the upper cover plate, and the third driving motor drives the flat belt to rotate so as to convey the plastic bag forwards continuously;
step 003, opening the plastic bag: the plastic tape after transportation is placed between upper plate and bottom plate, and upper plate and bottom plate link to each other with the slider of upper and lower lead screw slide rail, and positive and negative screw thread is equipped with to upper and lower lead screw slide rail, realizes the opposite direction or the opposite movement of slider through motor drive to drive the synchronous motion of upper plate and bottom plate. The upper supporting plate and the lower supporting plate are provided with vacuum suckers, and the plastic bag is synchronously sucked in the process of opposite movement of the upper supporting plate and the lower supporting plate, so that the plastic bag is opened;
step 004, tightening of the plastic bag: the second moving plate moves forwards into the opened plastic bag through the second front and rear screw rod slide rails, and a first tightening plate and a second tightening plate which are fixed on the second moving plate start to move in opposite directions under the action of the left and right screw rod slide rails until the left and right sides of the plastic bag are tightened;
step 005, folding and pressing the folding plate: the first moving plate moves forwards to the position of the tightly-supported plastic bag through the first front and rear lead screw sliding rails, and a rotating motor arranged on the fixed frame performs belt transmission through a synchronous belt, so that the folding plate is turned inwards by 180 degrees on the fixed frame, and the plastic bag is folded and clamped for the first time;
step 006, retreating the tightening plate: the supporting plate is pulled out backwards by the second front and rear screw rod slide rails, and the plastic bag is pressed and folded on the inner wall of the fixed plate by the folding plate.
Step 007, repeating step 004: the first tightening plate and the second tightening plate are tightly attached to a folding plate which is turned 180 degrees at the inner side of the fixing frame.
Step 008, moving the folding plate forward: the first front and rear screw rod slide rails continue to move forwards until the folding plate is separated from the plastic bag, and at the moment, the first tightening plate and the second tightening plate continue to move reversely to tighten the plastic bag.
Step 009, folding plate reduction: the folding plate is turned back and moved to the initial position.
Step 010, repeating steps 005-009: and the plastic bag is repeatedly folded and compressed in the axial direction.
The invention has the following beneficial effects:
1. the upper and lower supporting plates and the vacuum chuck which move oppositely are utilized to replace manual bagging, so that the automatic opening of the plastic bag is realized, the structure is simple, and the opening effect is good.
2. Utilize 180 upsets of folding plate to carry out the folding compressing tightly of small amplitude scope along the axial to the plastic bag repeatedly, be continuous N shape with the plastic bag is folding, folding range is little and guarantee to compress tightly the effect, the smooth extraction of the straight cylinder plastic bag of being convenient for. According to plastic bags with different sizes, the sizes of the folding plate and the supporting plate are adjusted correspondingly.
Description of the drawings:
fig. 1 is a schematic view of a straight-tube type plastic bag folding and compressing device according to the present invention;
fig. 2 is a schematic view of a plastic bag roller of a straight-cylinder type plastic bag folding and pressing device provided by the invention:
fig. 3 is a schematic view of a plastic bag transporting device of a straight cylinder type plastic bag folding and compressing device provided by the invention:
fig. 4 is a schematic view of a plastic bag opening device of a straight cylinder type plastic bag folding and compressing device according to the present invention:
fig. 5 is a schematic view of a plastic bag folding and compressing apparatus of a straight cylinder type plastic bag folding and compressing apparatus according to the present invention:
in the figure: 1. rolling plastic bags; 2. a plastic bag transporting device; 3. a plastic bag opening device; 4. a plastic bag folding and pressing device; 5. a work table; 6. a rolling shaft; 7. a T-shaped bearing seat; 8. extruding the roller; 9. a circular flange type bearing housing; 10. a first support frame; 11. a second support frame; 12. a first drive motor; 13. a second drive motor; 14. a third support frame; 15. A fourth support frame; 16. a flat belt; 17. an upper cover plate; 18. a rotating shaft; 19. a third drive motor; 20. cutting round flange type bearing seats from two sides; 21. a lower supporting plate; 22. an upper supporting plate; 23. a fifth support frame; 24. a sixth support frame; 25. upper and lower lead screw slide rails; 26. a vacuum chuck; 27. folding the board; 28. a synchronizing gear; 29. a synchronous belt; 30. a fixed mount; 31. rotating the motor; 32. a first moving plate; 33. a first front and rear lead screw slide rail; 34. a first tightening plate; 35 a second tensioning plate; 36. a left screw rod slide rail and a right screw rod slide rail; 37. a second moving plate; 38. a second front and rear screw rod slide rail.
The specific implementation mode is as follows:
referring to fig. 1 to 5, the present invention provides a straight cylinder type plastic bag folding and compressing apparatus, comprising: the plastic bag opening device comprises a rotary drum plastic bag 1, a plastic bag conveying device 2, a plastic bag opening device 3, a plastic bag folding and pressing device 4 and a workbench 5. The plastic bag rolling machine is characterized in that the plastic bag rolling machine 1 is provided with a rolling rotating shaft 6 for winding the plastic bag, two ends of the rolling rotating shaft 6 are provided with T-shaped bearing seats 7, and the T-shaped bearing seats 7 are fixed on the workbench 5. By dragging one end of the plastic bag, the plastic bag continuously rotates, and continuous supply of the plastic bag is realized.
Referring to fig. 3, the plastic bag transporting device 2 is provided with the mutually engaged squeeze rollers 8, the two ends of each squeeze roller 8 are provided with a circular flange type bearing seat 9, one end of each squeeze roller is connected with a first support frame 10, the other end of each squeeze roller is connected with a second support frame 11, the first support frame 10 is connected with a first driving motor 12 and a second driving motor 13 through bolts and fixed on the workbench 5 together, and the mutually engaged squeeze rollers 8 are driven to clamp and transport the plastic bags by the opposite movement of the first driving motor 12 and the second driving motor 13. The plastic bag conveying device 2 is internally provided with a flat belt 16 for conveying plastic bags continuously, two rotating shafts 18 are distributed in the flat belt 16, two ends of each rolling shaft 18 are connected with two cutting circular flange type bearing seats 20, the two cutting circular flange type bearing seats are respectively fixed on a third supporting frame 14 and a fourth supporting frame 15, the third supporting frame 14 is provided with a third driving motor 19, and the third supporting frame 14 and the fourth supporting frame 15 are fixed on the workbench 5 together. The upper cover plate 17 and the two cutting circular flange type bearing seats 20 are connected above the third support frame 14 and the fourth support frame 15 through screws. The clamped plastic bag is continuously transported forwards on the flat belt and enters the next procedure.
Referring to fig. 4, the plastic bag opening device 3 is symmetrically distributed with an upper supporting plate 22 and a lower supporting plate 21, and sliding grooves are formed at the left and right sides of the upper supporting plate 22 and the lower supporting plate 21 to form sliding guide rails with a fifth supporting frame 23 and a sixth supporting frame 24. The upper supporting plate 22 and the lower supporting plate 21 are connected with two sliding blocks in the upper and lower screw rod sliding rails 25, and when the motors in the upper and lower screw rod sliding rails rotate, the upper supporting plate 22 and the lower supporting plate 21 are driven to move in the opposite direction and the opposite direction by using the positive and negative threads. Meanwhile, vacuum suction cups 26 are installed in the upper and lower trays 22 and 21, and when the plastic bag is transferred between the upper and lower trays 22 and 21, the plastic bag is sucked by the vacuum suction cups and opened during the opposite movement of the upper and lower trays 22 and 21.
Referring to fig. 5, the plastic bag folding and compressing device 4 has four folding plates 27 symmetrically distributed in space, one end of each folding plate 27 is provided with a synchronous gear 28, and the synchronous gear is in belt transmission with a rotating motor 31 mounted on a fixed frame 30 through a synchronous belt 29, so that the folding plates 27 are turned inwards by 180 degrees on the fixed frame 30. The fixed frame 30 is installed on a first moving plate 32, and the first moving plate 32 is connected with a first front and rear screw rod slide rail 33 to realize the front and rear movement of the folding plate 27. The middle part of the first moving plate 32 is a hollow square, the first tightening plate 34 and the second tightening plate 35 penetrate through the moving plate 32, the first tightening plate 34 and the second tightening plate 35 are connected with the left screw rod slide rail and the right screw rod slide rail 36, and the two slide blocks on the left screw rod slide rail and the right screw rod slide rail are utilized to realize the opposite or opposite movement of the tightening plates. The first tightening plate 34 and the second tightening plate 35 are fixed in a second moving plate 37, and the second moving plate 37 is connected to a second front-rear screw rail 38. The opened plastic bag is tightly supported by the first tightening plate 34 and the second tightening plate 35, and the folding plate 27 is used for turning the plastic bag 180 degrees inwards to realize the folding of the plastic bag.
A straight cylinder type plastic bag folding and pressing method comprises the following steps:
step 001, clamping a plastic bag: one side port of the plastic bag 1 is wound on the rolling rotating shaft 6, the other side port is placed in the squeezing roller 8, the squeezing roller 8 which is meshed with the plastic bag is driven to rotate by the opposite movement of the first driving motor 12 and the second driving motor 13, and the plastic bag is continuously pressed in the squeezing roller 8 and continuously moves forwards;
step 002, conveying of plastic bags: after being clamped, the plastic is placed between the flat belt 16 and the upper cover plate 17, and the third driving motor 19 drives the flat belt 16 to rotate so as to convey the plastic bag forwards continuously;
step 003, opening the plastic bag: the plastic belt after transportation is placed between upper supporting plate 22 and lower supporting plate 21, and upper supporting plate 22 links to each other with the slider of upper and lower lead screw slide rail 25 with lower supporting plate 21, and upper and lower lead screw slide rail 25 is equipped with positive and negative screw, realizes the opposite direction or the opposite movement of slider through motor drive to drive the synchronous motion of upper supporting plate 22 and lower supporting plate 21. The upper supporting plate 22 and the lower supporting plate 21 are provided with vacuum suckers 26, and the plastic bag is synchronously sucked in the process of the opposite movement of the upper supporting plate 22 and the lower supporting plate 21, so that the plastic bag is opened;
step 004, tightening of the plastic bag: the second moving plate 37 moves forward into the opened plastic bag through the second front and rear screw slide rails 38, and the first tightening plate 34 and the second tightening plate 35 fixed on the second moving plate 37 start to move in opposite directions under the action of the left and right screw slide rails 36 until the left and right sides of the plastic bag are tightened;
step 005, folding and pressing the folding plate: the first moving plate 32 moves forwards to the position of the tightly-supported plastic bag through the first front and rear lead screw slide rails 33, and a rotating motor arranged on the fixed frame 30 performs belt transmission through a synchronous belt 29, so that the folding plate 27 is turned inwards by 180 degrees on the fixed frame 30, and the plastic bag is folded and clamped for the first time;
step 006, retreating the tightening plate: the first tightening plate 34 and the second tightening plate 35 are drawn out backward by the second front and rear screw sliding rails 37, and the plastic bag is pressed and folded against the inner wall of the fixing frame 30 by the folding plate 27.
Step 007, repeating step 004: the first tightening plate 34 and the second tightening plate 35 are attached to the folding plate 27 turned 180 ° inside the fixed frame 30.
Step 008, moving the folding plate forward: the first front and rear screw slide rails 33 continue to move forward until the folding plate 27 is separated from the plastic bag, and at this time, the first tightening plate 34 and the second tightening plate 35 continue to move reversely to tighten the plastic bag.
Step 009, folding plate reduction: the folding plate 27 is turned back and moved to the initial position.
Step 010, repeating steps 005-009: and the plastic bag is repeatedly folded and compressed in the axial direction.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The utility model provides a straight cylinder formula plastic bag folding and pressing device which characterized in that includes: the plastic bag opening device comprises a rotary drum plastic bag (1), a plastic bag conveying device (2), a plastic bag opening device (3), a plastic bag folding and pressing device (4) and a workbench (5). The plastic bag winding machine is characterized in that the roller plastic bag (1) is provided with a rolling rotating shaft (6) for winding the plastic bag, two ends of the rolling rotating shaft (6) are provided with T-shaped bearing seats (7), and the T-shaped bearing seats (7) are fixed on the workbench (5).
2. The straight-cylinder type plastic bag folding and compressing device as claimed in claim 1, wherein the plastic bag transporting device (2) is provided with mutually engaged squeeze rollers (8), the squeeze rollers (8) are provided with circular flange type bearing seats (9) at both ends, one end is connected with a first support frame (10), the other end is connected with a second support frame (11), the first support frame (10) is connected with a first driving motor (12) and a second driving motor (13) through bolts and fixed together on the worktable (5), and the clamping and the transportation of the plastic bag are realized by the opposite movement of the first driving motor (12) and the second driving motor (13). The plastic bag conveying device (2) is internally provided with a flat belt (16) for conveying plastic bags continuously, two rotating shafts (18) are distributed in the flat belt (16), two ends of each rolling shaft (18) are connected with two cutting circular flange type bearing seats (20), the two cutting circular flange type bearing seats are fixed on a third supporting frame (14) and a fourth supporting frame (15) respectively, and the third supporting frame (14) is provided with a third driving motor (19) and fixed on a workbench (5) together with the fourth supporting frame (15). The upper cover plate (17) and two cutting circular flange type bearing seats (20) are connected above the third supporting frame (14) and the fourth supporting frame (15) through screws.
3. The straight-cylinder type plastic bag folding and pressing device as claimed in claim 1, wherein the plastic bag opening device (3) is symmetrically provided with an upper supporting plate (22) and a lower supporting plate (21), the upper supporting plate (22) and the lower supporting plate (21) are provided with sliding grooves on the left and right sides, and the sliding grooves, the fifth supporting frame (23) and the sixth supporting frame (24) form sliding guide rails. The upper supporting plate (22) and the lower supporting plate (21) are connected with two sliding blocks in the upper and lower screw rod sliding rails (25), and the upper supporting plate (22) and the lower supporting plate (21) move oppositely and oppositely through the rotation of motors in the upper and lower screw rod sliding rails. And vacuum suckers (26) are arranged in the upper supporting plate (22) and the lower supporting plate (21), the plastic bag is sucked by the vacuum suckers, and the plastic bag is opened in the opposite movement process of the upper supporting plate (22) and the lower supporting plate (21).
4. The straight-cylinder type plastic bag folding and pressing device as claimed in claim 1, wherein the plastic bag folding and pressing device (4) is provided with four folding plates (27) in a spatially symmetrical distribution, one end of each folding plate (27) is provided with a synchronous gear (28) which is in belt transmission with a rotating motor (31) installed on a fixed frame (30) through a synchronous belt (29), so that the folding plates (27) are turned inwards by 180 degrees on the fixed frame (30). The fixed frame (30) is arranged on a first movable plate (32), and the first movable plate (32) is connected with a first front and rear screw rod slide rail (33) to realize the front and rear movement of the folding plate (27). The middle of the first moving plate (32) is a hollow square, the first tightening plate (34) and the second tightening plate (35) penetrate through the moving plate (32), the first tightening plate (34) and the second tightening plate (35) are connected with the left screw rod slide rail and the right screw rod slide rail (36), and the two sliding blocks on the left screw rod slide rail and the right screw rod slide rail are utilized to realize the opposite or opposite movement of the tightening plates. The first tightening plate (34) and the second tightening plate (35) are fixed in a second moving plate (37), and the second moving plate (37) is connected with a second front-rear screw rod sliding rail (38).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110755127.4A CN113428719B (en) | 2021-07-01 | 2021-07-01 | Straight cylinder type plastic bag folding and pressing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110755127.4A CN113428719B (en) | 2021-07-01 | 2021-07-01 | Straight cylinder type plastic bag folding and pressing device |
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| Publication Number | Publication Date |
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| CN113428719A true CN113428719A (en) | 2021-09-24 |
| CN113428719B CN113428719B (en) | 2023-01-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110755127.4A Active CN113428719B (en) | 2021-07-01 | 2021-07-01 | Straight cylinder type plastic bag folding and pressing device |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4285686A (en) * | 1979-10-05 | 1981-08-25 | Gloucester Engineering Co., Inc. | V-Board folder for flexible plastic films |
| KR101447529B1 (en) * | 2013-04-05 | 2014-10-08 | 주식회사 주안 | Manufacturing apparatus for packing envelope |
| CN107399105A (en) * | 2017-08-02 | 2017-11-28 | 龚林晖 | A kind of full-automatic plastic film multilayer folding machine and method |
| CN110281586A (en) * | 2019-07-31 | 2019-09-27 | 常熟理工学院 | A kind of plastics lead directly to bag folding machine and fold control method |
| CN111392153A (en) * | 2020-04-26 | 2020-07-10 | 珠海多边形科技有限公司 | Facial mask folding mechanism and facial mask machine |
| CN213108436U (en) * | 2020-08-03 | 2021-05-04 | 荆州市松圣塑业有限公司 | Novel bag making machine for producing square bags |
-
2021
- 2021-07-01 CN CN202110755127.4A patent/CN113428719B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4285686A (en) * | 1979-10-05 | 1981-08-25 | Gloucester Engineering Co., Inc. | V-Board folder for flexible plastic films |
| KR101447529B1 (en) * | 2013-04-05 | 2014-10-08 | 주식회사 주안 | Manufacturing apparatus for packing envelope |
| CN107399105A (en) * | 2017-08-02 | 2017-11-28 | 龚林晖 | A kind of full-automatic plastic film multilayer folding machine and method |
| CN110281586A (en) * | 2019-07-31 | 2019-09-27 | 常熟理工学院 | A kind of plastics lead directly to bag folding machine and fold control method |
| CN111392153A (en) * | 2020-04-26 | 2020-07-10 | 珠海多边形科技有限公司 | Facial mask folding mechanism and facial mask machine |
| CN213108436U (en) * | 2020-08-03 | 2021-05-04 | 荆州市松圣塑业有限公司 | Novel bag making machine for producing square bags |
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| CN113428719B (en) | 2023-01-24 |
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