A paper feeding mechanism for a flexographic printing machine

Abstract

This utility model discloses a paper feeding mechanism for a flexographic printing machine. The mechanism includes a first conveyor line, a second conveyor line, a paper pushing unit, and a paper blocking unit. The first conveyor line continuously buffers multiple paper rolls and transports the front paper roll to the second conveyor line. The rear end of the second conveyor line connects to the first conveyor line, and the front end is adjacent to a feeding tray. The paper pushing unit pushes the paper roll to the feeding tray via a push arm, and the paper blocking unit blocks and limits the paper roll during pushing. This utility model achieves fully automatic paper roll feeding through automated conveying and buffering design, significantly improving efficiency, avoiding downtime for roll changes to extend continuous operating time, and reducing labor intensity and costs. It is suitable for various flexographic printing machine production lines.

Description

Technical Field

[0001] This utility model belongs to the field of printing equipment technology, and in particular relates to a paper feeding mechanism for a flexographic printing machine. Background Technology

[0002] In the flexographic printing process, the paper roll loading step is one of the key steps affecting printing efficiency. Currently, the industry commonly uses manual methods for paper roll handling and loading: operators must move the paper rolls from the storage area to the flexographic printing machine's loading tray. This traditional method has the following shortcomings:

[0003] 1. Low efficiency: Handling and loading take a long time, especially when the paper rolls are heavy (such as those with a diameter of more than 1 meter and a weight of several hundred kilograms). Each loading requires 2-3 people to work together, which seriously restricts the continuous operation speed of the production line.

[0004] 2. High labor intensity: Frequent handling of heavy objects can easily lead to operator fatigue and increase the risk of work-related injuries;

[0005] 3. Production interruption risk: When a paper roll is used up, the machine needs to be stopped to replace it with a new paper roll. The average roll replacement time exceeds 5 minutes, which reduces the equipment utilization rate. Utility Model Content

[0006] Based on this, and in response to the aforementioned technical problems, a paper feeding mechanism for a flexographic printing press is provided.

[0007] The technical solution adopted in this utility model is as follows:

[0008] A paper feeding mechanism for a flexographic printing press, characterized in that it comprises:

[0009] The first conveyor line is used to continuously buffer multiple paper rolls at the front and back and to transport the first paper roll at the front to the second conveyor line;

[0010] The second conveyor line is used to pick up paper rolls from the first conveyor line and convey them to the outside of the loading tray of the flexographic printing machine. The rear end of the second conveyor line is connected to the front end of the first conveyor line, and the front end is arranged adjacent to the loading tray on the left and right.

[0011] A paper pushing unit is used to push a paper roll located at the front end of the second conveyor line onto the feeding tray in a left-right direction. The paper pushing unit includes a push arm driven by a first power source.

[0012] A paper-blocking unit used to block the paper roll on opposite sides when the paper-pushing unit is in operation.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. Significantly improves feeding efficiency: Through the automated connection between the first and second conveyor lines, and with the mechanical cooperation of the paper pushing unit and the paper blocking unit, the paper roll is automatically conveyed from the buffer to the feeding tray, greatly shortening the feeding time per cycle and significantly improving efficiency compared to manual handling.

[0015] 2. Enables continuous production: The first conveyor line can continuously buffer multiple paper rolls. After the first paper roll is conveyed to the second conveyor line, the subsequent paper rolls can be automatically replenished to the front end, avoiding downtime and roll replacement due to the use of a single roll. The continuous running time of the equipment is extended and the utilization rate is improved. When an accident occurs upstream, there is enough time to handle the fault without affecting the efficiency of the flexographic printing machine and manpower. 3. Significantly reduces labor intensity and cost. Attached Figure Description

[0016] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments:

[0017] Figure 1 A top view of the paper feeding mechanism of a flexographic printing machine provided for an embodiment of this utility model;

[0018] Figure 2 This is a three-dimensional structural diagram of an embodiment of the present utility model;

[0019] Figure 3 This is a three-dimensional structural diagram of the paper pushing unit according to an embodiment of the present utility model;

[0020] Figure 4 This is a bottom view of the top plate of an embodiment of the present utility model;

[0021] Figure 5 This is a three-dimensional structural diagram of the paper-blocking unit according to an embodiment of the present invention. Figure 1 ;

[0022] Figure 6 This is a three-dimensional structural diagram of the paper-blocking unit according to an embodiment of the present invention. Figure 2 ;

[0023] Figure 7 This is a schematic diagram of the transition plate in an embodiment of the present utility model. Detailed Implementation

[0024] The embodiments of this utility model will be described below with reference to the accompanying drawings. It should be noted that the embodiments described in this specification are not exhaustive and do not represent the only embodiments of this utility model. The corresponding embodiments below are only for clearly illustrating the utility model content of this patent and are not intended to limit its implementation. For those skilled in the art, different variations and modifications can be made based on the described embodiments. Any obvious variations or modifications that fall within the technical concept and utility model content of this utility model are also within the protection scope of this utility model.

[0025] like Figure 1 As shown, this utility model embodiment provides a paper feeding mechanism for a flexographic printing machine, including a first conveyor line 1100, a second conveyor line 1200, a paper pushing unit 1300, a paper blocking unit 1400, and a transition plate 1500.

[0026] The first conveyor line 1100 is used to continuously buffer multiple paper rolls at the front and rear, and to convey the first paper roll at the front to the second conveyor line 1200.

[0027] A first sensor is installed at the front end and the rear end of the first conveyor line 1100, respectively, to detect whether there is a roll of paper at the front end and the rear end of the first conveyor line.

[0028] In this embodiment, the first conveyor line 1100 can continuously buffer up to 3 paper rolls. Of course, the number of paper rolls buffered is not limited to 3. Thus, when an accident occurs upstream, there is enough time to handle the fault without affecting the efficiency of the flexographic printing machine and manpower.

[0029] In practical applications, materials can be fed to the first conveyor line 1100 manually or via a matching AGV trolley.

[0030] The second conveyor line 1200 is used to pick up paper rolls from the first conveyor line 1100 and convey them to the outside of the flexographic printing machine loading tray 2. The rear end of the second conveyor line 1200 is connected to the front end of the first conveyor line 1100, and the front end of the second conveyor line 1200 is adjacent to the right side of the loading tray 2.

[0031] In this embodiment, both the first conveyor line 1100 and the second conveyor line 1200 use chain conveyor belts.

[0032] The paper pushing unit 1300 is used to push the paper roll located at the front end of the second conveyor line 1200 onto the feeding tray 2 along the left-right direction of the conveyor line, such as... Figure 2 and Figure 3 As shown, it includes a housing 1310, a support frame 1320, a push arm 1330, and a first power source 1340.

[0033] The top plate 1311 of the outer casing 1310 has a window 1311a for the front end of the push arm 1330 to extend or retract. A closing plate 1360 is provided at the window 1311a, which is opened or closed by a second power source 1350 to prevent dust from falling in or people from stepping through the window 1311a and causing safety accidents. The closing plate 1360 is located inside the top plate 1311. The second power source 1350 is fixed to the inside of the top plate 1311 by bolts and is connected to the closing plate 1360. (See [reference]). Figure 4 .

[0034] The support frame 1320 is fixed inside the housing 1310, such as Figure 3 As shown, it has two sets of slides 1321, with the two slides 1321 in each set arranged at intervals on the left and right (in the front and back directions of the conveyor line).

[0035] The push arm 1330 is arranged obliquely upward in the left and right directions of the conveyor line. It has two side plates 1331 corresponding to the two left and right slides 1321. Each side plate 1331 has a track 1331a that slides and engages with the slide 1321 on the same side, so that the push arm 1330 and the support frame 1320 slide and engage obliquely upward in the left and right directions of the conveyor line.

[0036] A roller 1332 is rotatably connected between the front ends of the two side plates 1331 to prevent damage to the paper roll during pushing. A drive rod 1333 is also connected between the two side plates 1331.

[0037] The first power source 1340 is used to drive the push arm 1330 to move obliquely. It is fixed on the support frame 1320 and connected to the transmission rod 1333.

[0038] Both the first power source 1340 and the second power source 1350 use cylinders.

[0039] The paper-blocking unit 1400 is used to block the paper roll on the opposite side when the paper-pushing unit 1300 is activated, such as... Figure 5 and Figure 6 As shown, it includes a base 1410, a baffle 1420, an airbag 1430, a second sensor 1440, and a third sensor 1450.

[0040] The base 1410 has a hinge seat 1411, and two support plates 1412 are arranged on the top of the base 1410. Each support plate 1412 is connected and fixed to the base 1410 by two support columns 1412a. See [reference needed] Figure 6 It is used to support the baffle 1420 after the airbag 1430 is retracted, so as to prevent the baffle 1420 from falling directly on the airbag 1430 and causing damage.

[0041] like Figure 6As shown, the baffle 1420 is hinged to the hinge seat 1411 on the base 1410 via the hinge shaft 1424 in the front-to-back direction, so that it can rotate left and right (in the left-to-right direction of the conveyor line).

[0042] The outer surface of the baffle 1420 has a limiting post 1421 for limiting the paper roll. The limiting post 1421 is arranged horizontally in the front-back direction to prevent the paper roll blocked by the baffle 1420 from shaking too much and causing the feeding tray 2 to be subjected to too much force.

[0043] like Figure 6 As shown, a limit rope is set between the inner surface of the baffle 1420 and the base 1410 through multiple lifting rings 1460 to prevent the baffle 1420 from exceeding the maximum position.

[0044] The baffle 1420 also has a detection hole 1422 corresponding to the second sensor 1440. The inner surface of the baffle 1420 is also fixed with a sensing element 1423 by bolts. In this embodiment, the sensing element 1423 is an L-shaped plate.

[0045] The airbag 1430 is used to lift the baffle 1420 so that the baffle 1420 blocks the paper roll pushed onto the feeding tray 2 by the paper pushing unit 1300. The airbag 1430 is mounted on the base 1410. The air inlet pipe of the airbag 1430 is equipped with a valve, including an air inlet valve 1431 and a pressure regulating valve 1432. Both the air inlet valve 1431 and the pressure regulating valve 1432 are fixed on the base 1410.

[0046] The second sensor 1440 is used to detect whether the paper roll has reached the front end of the second conveyor line. The third sensor 1450 is used to sense the sensed component 1423 just after the airbag 1430 is closed, so as to determine whether the airbag 1430 is in a closed or open state. The second sensor 1440 and the third sensor 1450 are both fixed on the base 1410 by the support plate. The second sensor 1440 can sense whether there is a paper roll at the front end of the second conveyor line through the detection hole 1422.

[0047] Among them, the first sensor, the second sensor 1440 and the third sensor 1450 can all be photoelectric sensors.

[0048] Transition plate 1500 is located between the front end of the second conveyor line 1200 and the feeding tray 2, such as Figure 7 As shown, it has a first inclined surface 1510 for guiding the roll of paper from the front end of the second conveyor line to the loading tray 2 and a second inclined surface 1520 for stopping the roll of paper on the loading tray 2.

[0049] During operation, the second conveyor line 1200 picks up the paper roll from the first conveyor line 1100 and conveys it to the front end, where it is detected by the second sensor 1440. At this time, the airbag 1430 inflates, lifting the baffle 1420. The baffle 1420 is held in place by the limiting rope at its maximum position. Simultaneously, the closing plate 1360 opens the window 1311a, and the push arm 1330 pushes the paper roll out onto the feeding tray 2 through the window 1311a. The baffle 1420 then blocks the paper roll until it stabilizes. After stabilization, the push arm 1330, the closing plate 1360, and the baffle 1420 return to their original positions in sequence.

[0050] As can be seen from the above, the beneficial effects of the paper feeding mechanism for a flexographic printing machine provided by this utility model embodiment are as follows:

[0051] 1. Significantly improves feeding efficiency: Through the automated connection between the first and second conveyor lines, and with the mechanical cooperation of the paper pushing unit and the paper blocking unit, the paper roll is automatically conveyed from the buffer to the feeding tray, greatly shortening the feeding time per cycle and significantly improving efficiency compared to manual handling.

[0052] 2. Achieve continuous production: The first conveyor line can continuously buffer multiple paper rolls. After the first paper roll on the front side is conveyed to the second conveyor line, the subsequent paper rolls can be automatically replenished to the front side, avoiding downtime and roll replacement due to the use of a single roll. The continuous running time of the equipment is extended and the utilization rate is improved. When an accident occurs upstream, there is enough time to handle the fault without affecting the efficiency of the flexographic printing machine and manpower.

[0053] 3. Significantly reduces labor intensity and costs.

[0054] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A paper feeding mechanism for a flexographic printing press, characterized in that, include: The first conveyor line is used to continuously buffer multiple paper rolls at the front and back and to transport the first paper roll at the front to the second conveyor line; The second conveyor line is used to pick up paper rolls from the first conveyor line and convey them to the outside of the loading tray of the flexographic printing machine. The rear end of the second conveyor line is connected to the front end of the first conveyor line, and the front end is arranged adjacent to the loading tray on the left and right. A paper pushing unit is used to push a paper roll located at the front end of the second conveyor line onto the feeding tray in a left-right direction. The paper pushing unit includes a push arm driven by a first power source. A paper-blocking unit used to block the paper roll on opposite sides when the paper-pushing unit is in operation.

2. The paper feeding mechanism of a flexographic printing machine according to claim 1, characterized in that, It also includes two first sensors for detecting whether there is a roll of paper at the front and rear ends of the first conveyor line, respectively.

3. The paper feeding mechanism of a flexographic printing machine according to claim 1, characterized in that, Both the first and second conveyor lines are chain conveyor belts.

4. The paper feeding mechanism of a flexographic printing machine according to claim 1, characterized in that, The paper pushing unit also includes a support frame. The push arm and the support frame slide obliquely upward in the left-right direction of the conveyor line. The front end of the push arm is rotatably connected to a roller. The first power source is fixed on the support frame and connected to the push arm.

5. The paper feeding mechanism for a flexographic printing machine according to claim 4, characterized in that, The paper pushing unit also includes a housing, and the top plate of the housing has a window for the front end of the push arm to extend or retract. The window is provided with a closing plate that is opened or closed under the drive of a second power source. The closing plate is located inside the top plate, and the second power source is fixed to the inside of the top plate and connected to the closing plate.

6. The paper feeding mechanism of a flexographic printing machine according to claim 1, characterized in that, The paper-blocking unit includes a base, a baffle that is hinged to the base via a hinge shaft in the front-rear direction to rotate left and right, and an airbag for lifting the baffle so that the baffle blocks the paper roll pushed by the paper-pushing unit onto the feeding tray. The airbag is disposed on the base, and a valve is provided on the air inlet pipe of the airbag. The valve is fixed on the base.

7. The paper feeding mechanism for a flexographic printing machine according to claim 6, characterized in that, The outer surface of the baffle has a limiting post for limiting the paper roll. The limiting post is arranged horizontally in the front-to-back direction. A limiting pull rope is provided between the inner surface of the baffle and the base.

8. The paper feeding mechanism of a flexographic printing machine according to claim 6, characterized in that, The paper-blocking unit also includes a second sensor for detecting whether the paper roll has reached the front end of the second conveyor line, a sensing element, and a third sensor for sensing the sensing element exactly after the airbag is retracted. The second sensor and the third sensor are both fixed on the base. The baffle has a detection hole corresponding to the second sensor, and the sensing element is fixed on the inner surface of the baffle.

9. A paper feeding mechanism for a flexographic printing press according to claim 6, characterized in that, The paper-blocking unit also includes two left and right support plates for supporting the baffle after the airbag is retracted. The two support plates are located above the base and are connected to the base through multiple support columns.

10. A paper feeding mechanism for a flexographic printing press according to any one of claims 1-9, characterized in that, It also includes a transition plate located between the front end of the second conveyor line and the loading tray, having a first inclined surface for guiding the roll of paper from the front end of the second conveyor line to the loading tray and a second inclined surface for stopping the roll of paper on the loading tray.

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