Marking device for sheet metal

Abstract

The utility model relates to code spraying device technical field discloses a kind of code spraying device of metal sheet, including conveying mechanism, spray head, controller, baffle and travel switch.The utility model is located by erecting baffle in the upstream of spray head above conveying mechanism, when the surface of metal sheet is seriously protruding or thickness is thick, metal sheet can be prevented by the below of baffle pass.And by using travel switch to detect baffle deformation, when metal sheet hits baffle, the motor of conveying mechanism is rapidly controlled to stop operation based on the detection of travel switch by controller, so that the metal sheet with seriously protruding surface or thick thickness cannot continue to move to the direction of spray head, further prevent metal sheet and spray head from hitting, so that the maintenance cost of code spraying device can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of inkjet printing device technology, and in particular to an inkjet printing device for thin metal sheets. Background Technology

[0002] Tinplate is a common name for galvanized steel sheet, widely used in the packaging industry due to its combination of metallic strength, corrosion resistance, machinability, and food-grade safety. To achieve the packaging applications of thin metal sheets like tinplate, after the pattern is printed on the surface, it also needs to be inkjet-copied.

[0003] Existing inkjet printers typically consist of a conveying mechanism and a printhead positioned above the conveying mechanism (e.g., the inkjet printer disclosed in CN111907229A). To improve the accuracy and clarity of the inkjet printing, the printhead of existing inkjet printers is brought close to the item to be printed. However, during the production and processing of tinplate, some tinplate surfaces may become uneven. When the tinplate surface protrusion is severe or the plate thickness is too thick, it increases the risk of the tinplate colliding with the printhead. Existing inkjet printers do not have the function of preventing the thin metal plate from colliding with the printhead. Utility Model Content

[0004] The purpose of this invention is to provide a coding device for thin metal sheets, which aims to solve the problem that existing coding devices do not have the function of preventing the thin metal sheet from colliding with the printhead.

[0005] To achieve the above objectives, the solution provided by this utility model is as follows:

[0006] A coding device for thin metal sheets includes a conveying mechanism, a printhead disposed above the conveying mechanism, and a controller electrically connected to the conveying mechanism and the printhead; it also includes:

[0007] A baffle is mounted above the conveying mechanism and is located upstream of the nozzle. The length direction of the baffle is parallel to the width direction of the metal sheet, and a gap is left between the baffle and the conveying surface of the conveying mechanism.

[0008] A limit switch is provided between the nozzle and the baffle, and is electrically connected to the controller. The contacts of the limit switch face the baffle and are actuated by the baffle.

[0009] Optionally, the conveying mechanism includes a frame, a drive roller rotatably mounted on the frame, a driven roller rotatably mounted on the frame, a conveyor belt wound around both the drive roller and the driven roller, a transmission mechanism driven by the drive roller, a motor driven by the transmission mechanism, and a bracket connected to the frame and located between the upper and lower sides of the conveyor belt.

[0010] Optionally, the bracket includes multiple support rods spaced apart along the length of the conveyor belt, and an inverted U-shaped support frame located on both sides of the bottom of the support rods and fixed to the frame.

[0011] Optionally, mounting plates are connected to both sides of the baffle along its length; the mounting plates are vertically arranged and have oblong holes extending in the vertical direction; a screw rod is fixed on the frame and passes horizontally through the oblong hole, and a nut that presses against the mounting plate is threaded onto the screw rod.

[0012] Optionally, the mounting plate has at least two oblong holes, and the oblong holes on the same mounting plate are arranged side by side.

[0013] Optionally, the mounting plate has a support rod vertically mounted on the side facing the baffle; the upper end of the baffle is bent and fixedly mounted on the support rod.

[0014] Optionally, the support rod is a cylindrical support rod, and a threaded hole is provided on the support rod; a threaded connector is inserted into the upper end of the baffle, and the threaded connector is threadedly connected to the threaded hole.

[0015] Optionally, an L-shaped plate is detachably connected to the lower part of the side of the mounting plate facing the baffle; the limit switch is detachably mounted on the L-shaped plate; the vertical part of the L-shaped plate is located next to the waist-shaped hole.

[0016] Optionally, a clearance opening is formed between the lateral portion of the L-shaped plate and the waist-shaped hole.

[0017] Beneficial effects:

[0018] This invention provides a coding device for thin metal sheets. By installing a baffle above the conveying mechanism and upstream of the printhead, it prevents the thin metal sheet from passing under the baffle if the surface is severely protruding or the sheet is excessively thick. Furthermore, by using a limit switch to detect baffle deformation, the controller can quickly stop the conveying mechanism motor when the thin metal sheet impacts the baffle, thus preventing the sheet with severe protrusions or excessive thickness from continuing to move towards the printhead and thus preventing collisions. This reduces the maintenance cost of the coding device. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the inkjet printing device for thin metal sheets provided by this utility model. Figure 1 .

[0021] Figure 2 yes Figure 1 Enlarged view of section A.

[0022] Figure 3 This is a schematic diagram of the structure of the inkjet printing device for thin metal sheets provided by this utility model. Figure 2 .

[0023] Figure 4 This is a schematic diagram of the structure of the inkjet printing device for thin metal sheets provided by this utility model. Figure 3 .

[0024] Figure 5 yes Figure 4 Enlarged view of section B.

[0025] Figure 6 This is a schematic diagram of the structure of the inkjet printing device for thin metal sheets provided by this utility model. Figure 4 .

[0026] Figure 7 yes Figure 6 Enlarged view of section C.

[0027] Explanation of icon numbers:

[0028] 1-Conveying mechanism; 101-Frame; 102-Drive roller; 103-Driven roller; 104-Conveyor belt; 105-Transmission mechanism; 106-Motor; 107-Bracket; 1071-Bracket rod; 1072-U-shaped support frame;

[0029] 2- Nozzle; 3- Baffle; 4- Limit switch; 5- Thin metal sheet;

[0030] 6-Mounting plate; 601-Oval hole;

[0031] 7-Screw; 8-Nut; 9-Support rod; 10-Threaded connector;

[0032] 11 - L-shaped plate; 111 - Vertical portion of L-shaped plate; 112 - Horizontal portion of L-shaped plate;

[0033] 12-Avoidance opening. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this utility model are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0036] It should also be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component present. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component present.

[0037] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0038] Please see Figures 1 to 7 This utility model provides a coding device for thin metal sheets, which can be used to code the surface of thin metal sheets 5 such as tinplate. Specifically, the coding device includes a conveying mechanism 1, a printhead 2, a controller, a baffle 3, and a limit switch 4.

[0039] The conveying mechanism 1 can be used in conjunction with a feeding assembly with suction cups. The feeding assembly can be the tinplate feeding assembly disclosed in CN216917705U. The feeding assembly can pick up and transfer stacked metal sheets 5 onto the conveying mechanism 1. The printhead 2 is mounted above the conveying mechanism 1. Therefore, when the metal sheet 5 is transferred to the conveying mechanism 1, it can be conveyed by the conveying mechanism 1 to a position below the printhead 2 for inkjet printing. Figure 1The arrow points in the direction of conveying the metal sheet 5. The nozzle 2 can be a nozzle 2 provided by Shanghai Shanghao Digital Technology Co., Ltd. The controller is electrically connected to the conveying mechanism 1 and the nozzle 2, and is used to control the start and stop of the conveying mechanism 1 and the nozzle 2, as well as their working status.

[0040] Furthermore, the length direction of the baffle 3 is parallel to the width direction of the metal sheet 5. It is mounted above the conveying mechanism 1, and a gap is left between the baffle 3 and the conveying surface of the conveying mechanism 1 to allow the metal sheet 5 with a flat surface and normal thickness to pass under the baffle 3 and then be conveyed to the area below the printhead 2 for printing. The limit switch 4 is located between the printhead 2 and the baffle 3, and the limit switch 4 is electrically connected to the controller. The contact of the limit switch 4 faces the baffle 3. When the surface of the metal sheet 5 is severely protruding or the thickness of the metal sheet 5 is too thick, the metal sheet 5 cannot pass under the baffle 3 and will hit the lower part of the baffle 3, causing the lower part of the baffle 3 to deform in the direction of the printhead 2, thereby triggering the contact of the limit switch 4. When the limit switch 4 is triggered, it immediately sends an electrical signal to the controller, which enables the controller to quickly control the motor 106 of the conveying mechanism 1 to stop operating based on the detection of the limit switch 4. This prevents the metal plate 5 with severe surface protrusion or excessive thickness from continuing to move towards the printhead 2, thereby preventing the metal plate 5 from colliding with the printhead 2 and reducing the maintenance cost of the coding device.

[0041] like Figure 3 and Figure 6 As shown, in an optional embodiment, the conveying mechanism 1 includes a frame 101, a drive roller 102 rotatably mounted on the frame 101, a driven roller 103 rotatably mounted on the frame 101, a conveyor belt 104 wound around both the drive roller 102 and the driven roller 103, a transmission mechanism 105 drivenly connected to the drive roller 102, a motor 106 drivenly connected to the transmission mechanism 105, and a bracket 107 connected to the frame 101 and located between the upper and lower sides of the conveyor belt. The bracket 107 is located between the upper and lower sides of the conveyor belt and is close to the upper side of the conveyor belt. It can support the conveyor belt 104 and prevent the conveyor belt 104 from sagging or deforming due to the weight of the metal sheet 5 or the tension during the conveying process. It can effectively prevent the metal sheet 5 with severe surface protrusions or excessive thickness from passing under the baffle 3, further reducing the risk of the metal sheet 5 colliding with the nozzle 2.

[0042] Specifically, the transmission mechanism 105 may include a drive wheel that is connected to the output shaft of the motor 106, a driven wheel that is coaxially arranged with the drive roller 102, and a transmission belt that is wound around the drive wheel or the driven wheel.

[0043] like Figure 6As shown, in an optional embodiment, the bracket 107 includes multiple support rods 1071 spaced apart along the length of the conveyor belt 104, and an inverted U-shaped support frame 1072 located on both sides of the bottom of the support rods 1071 and fixed to the frame 101. The support rods 1071 can be fixed to the top of the inverted U-shaped support frame 1072 by welding. In this embodiment, the multiple spaced support rods 1071 can provide uniform support to the upper side of the conveyor belt 104, preventing the conveyor belt 104 from sagging due to the weight of the metal sheet 5 or the conveying tension.

[0044] like Figure 1 , Figure 2 , Figure 4 as well as Figure 5 As shown, in an optional embodiment, mounting plates 6 are connected to both sides of the baffle 3 along its length. The mounting plates 6 are vertically oriented and have oblong holes 601 extending vertically. A screw 7, horizontally passing through the oblong holes 601, is fixed on the frame 101, and a nut 8, which presses against the mounting plate 6, is threaded onto the screw 7. In this embodiment, the cooperation between the vertical oblong holes 601 and the screw 7 provides a basis for adjusting the height of the baffle 3. Loosening the nut 8 allows the mounting plate 6 to move up and down along the oblong holes 601, thereby adjusting the gap between the lower end of the baffle 3 and the conveying surface of the conveying mechanism 1. This allows for flexible adaptation to the normal conveying and coding requirements of metal sheets 5 of different thicknesses.

[0045] Once the height of the baffle 3 is adjusted to the correct position, the nut 8 can be tightened to press firmly against the surface of the mounting plate 6, thus fixing the mounting plate 6 onto the frame 101.

[0046] like Figure 4 and Figure 5 As shown, for example, each screw 7 may be fitted with only one nut 8. When only one nut 8 is fitted on the screw 7, the nut 8 is located on the side of the mounting plate 6 facing the baffle 3. Through the double compression action of the nut 8 and the frame 101, the mounting plate 6 can be stably fixed on the frame 101.

[0047] like Figure 1 and Figure 2 As shown, in an optional embodiment, the mounting plate 6 has at least two oblong holes 601, and the oblong holes 601 on the same mounting plate 6 are arranged side by side. Compared with a single oblong hole 601, multiple oblong holes 601 arranged side by side can form a more stable multi-point connection structure with the screw 7 on the frame 101. When the metal plate 5 impacts the baffle 3, the mounting plate 6 will not shift or tilt due to the impact force on the baffle 3, thereby ensuring that the baffle 3 connected to the mounting plate 6 effectively prevents the metal plate 5 from impacting the nozzle 2.

[0048] like Figure 6 and Figure 7 As shown, in an optional embodiment, the mounting plate 6 has a support rod 9 vertically mounted on the side facing the baffle 3; the upper end of the baffle 3 is bent and fixedly mounted on the support rod 9. In this embodiment, the vertically mounted support rod 9 provides a stable support point for the baffle 3. Combined with the bent design at the upper end of the baffle 3, it ensures that the baffle 3 maintains the correct posture parallel to the width direction of the metal sheet 5, preventing the baffle 3 from tilting during installation or use. This ensures that the gap between the baffle 3 and the conveying surface of the conveying mechanism 1 is uniform, allowing the baffle 3 to prevent the metal sheet 5 from colliding with the nozzle 2.

[0049] like Figure 6 and Figure 7 As shown, in an optional embodiment, the support rod 9 is a cylindrical support rod with a threaded hole; a threaded connector 10 is inserted into the upper end of the baffle 3, the threaded connector 10 being a screw, bolt, etc., which is threadedly connected to the threaded hole. In this embodiment, the cylindrical support rod has a smooth surface, which reduces frictional loss with the bent part of the baffle 3, and the threaded connection method can achieve a firm fixation between the baffle 3 and the support rod 9, preventing the baffle 3 and the support rod 9 from loosening or separating when the thin metal plate 5 impacts the baffle 3, ensuring that the baffle 3 always maintains a stable posture.

[0050] like Figure 4 and Figure 5 As shown, in an optional embodiment, an L-shaped plate 11 is detachably connected to the lower part of the side of the mounting plate 6 facing the baffle 3; the limit switch 4 can be fixed to the L-shaped plate 11 with screws for easy replacement and maintenance; the vertical part of the L-shaped plate 11 is located next to the waist-shaped hole 601, ensuring that the limit switch 4 is installed without obstructing the waist-shaped hole 601, so that the height adjustment operation of the mounting plate 6 can be carried out smoothly.

[0051] For example, the limit switch 4 can be the LXW5 / AZ series limit switch from Shuangao Electronics.

[0052] like Figure 4 and Figure 5 As shown, in an optional embodiment, a clearance opening 12 is formed between the lateral portion of the L-shaped plate 11 and the oblong hole 601. The clearance opening 12 ensures that the L-shaped plate 11 does not obstruct the oblong hole 601 when the mounting plate 6 is height adjusted, thus allowing the adjustment operation to proceed smoothly while maintaining the stable installation of the limit switch 4 and not affecting its normal detection function.

[0053] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A coding device for thin metal sheets, comprising a conveying mechanism (1), a printhead (2) disposed above the conveying mechanism (1), and a controller electrically connected to the conveying mechanism (1) and the printhead (2); characterized in that, Also includes: Baffle (3), the baffle (3) is mounted above the conveying mechanism (1) and the baffle (3) is located upstream of the nozzle (2). The length direction of the baffle (3) is parallel to the width direction of the metal sheet (5). There is a gap between the baffle (3) and the conveying surface of the conveying mechanism (1). Limit switch (4) is located between nozzle (2) and baffle (3) and is electrically connected to controller. The contacts of limit switch (4) face baffle (3) and are touched by baffle (3).

2. The inkjet printing device for metal sheets according to claim 1, characterized in that, The conveying mechanism (1) includes a frame (101), a drive roller (102) rotatably mounted on the frame (101), a driven roller (103) rotatably mounted on the frame (101), a conveyor belt (104) simultaneously wound around the drive roller (102) and the driven roller (103), a transmission mechanism (105) drivenly connected to the drive roller (102), a motor (106) drivenly connected to the transmission mechanism (105), and a bracket (107) connected to the frame (101) and located between the upper and lower sides of the conveyor belt (104).

3. The inkjet printing device for metal sheets according to claim 2, characterized in that, The bracket (107) includes multiple support rods (1071) spaced apart along the length of the conveyor belt (104), and an inverted U-shaped support frame (1072) located on both sides of the bottom of the support rods (1071) and fixed to the frame (101).

4. The inkjet printing device for metal sheets according to claim 2, characterized in that, The baffle (3) is connected to mounting plates (6) on both sides along its length; the mounting plates (6) are vertically arranged and have waist-shaped holes (601) extending vertically; a screw (7) is fixed on the frame (101) and passes horizontally through the waist-shaped holes (601), and a nut (8) is threaded onto the screw (7) and presses against the mounting plates (6).

5. The inkjet printing device for metal sheets according to claim 4, characterized in that, The mounting plate (6) is provided with at least two waist-shaped holes (601), and the waist-shaped holes (601) on the same mounting plate (6) are arranged side by side.

6. The inkjet printing device for metal sheets according to claim 4, characterized in that, The mounting plate (6) has a support rod (9) vertically mounted on the side facing the baffle (3); the upper end of the baffle (3) is bent and fixedly mounted on the support rod (9).

7. The inkjet printing device for metal sheets according to claim 6, characterized in that, The support rod (9) is a cylindrical support rod (9), and a threaded hole is provided on the support rod (9); a threaded connector (10) is inserted into the upper end of the baffle (3), and the threaded connector (10) is threadedly connected to the threaded hole.

8. The inkjet printing device for metal sheets according to claim 4, characterized in that, The mounting plate (6) has an L-shaped plate (11) detachably connected to the lower part of the side facing the baffle (3); the limit switch (4) is detachably mounted on the L-shaped plate (11); the vertical part (111) of the L-shaped plate (11) is located next to the waist-shaped hole (601).

9. The inkjet printing device for metal sheets according to claim 8, characterized in that, An clearance opening (12) is formed between the transverse portion (112) of the L-shaped plate (11) and the waist-shaped hole (601).

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