Double-CCD (charge coupled device) alignment mechanism and screen printing machine

Abstract

The utility model discloses a double-CCD (Charge Coupled Device) alignment mechanism and a screen printing machine. The mechanism comprises an upper alignment mechanism and a lower alignment mechanism, the upper alignment mechanism comprises an upper alignment CCD (Charge Coupled Device) camera; the upper alignment CCD camera is arranged on the carrying mechanism; the lower alignment mechanism comprises a lower alignment CCD (Charge Coupled Device) camera; the lower alignment CCD camera is arranged below a printing table of the printing mechanism; the upper alignment mechanism and the lower alignment mechanism further comprise annular light supplementing lamps, and the annular light supplementing lamps are arranged below the upper alignment CCD camera and above the lower alignment CCD camera respectively. The utility model is suitable for the printing work of transparent and non-transparent sheet stock, and has better generality.

Description

Technical Field

[0001] This utility model relates to screen printing machines, specifically to a dual CCD alignment mechanism and a screen printing machine. Background Technology

[0002] In the screen printing process, the printing area of ​​the substrate needs to be aligned so that it is accurately positioned directly below the screen to obtain a qualified print. Existing screen printing equipment uses an automatic alignment device. When the printing area of ​​the substrate is not in the correct position, this device automatically adjusts the substrate, moving or rotating it to the correct location until the printing area is in the required position.

[0003] For example, the utility model patent with authorization announcement number CN208118657U discloses a multifunctional vacuum platform alignment system. The alignment system includes a support platform, an alignment mechanism, and two CCD cameras. The alignment mechanism includes a base plate and an adjustment mechanism, which is arranged in a rectangular shape on the base plate. The CCD cameras are connected to the base plate through a fixed connection mechanism. This alignment system can more accurately align the printing material with the screen to obtain a more accurate printing effect.

[0004] The above-mentioned screen printing machines have the following shortcomings:

[0005] The CCD camera of the aforementioned screen printing machine is located below the printing table, while the alignment mark of the sheet material is generally located on the upper surface of the sheet material. This design is only suitable for printing transparent sheet materials and not for printing non-transparent sheet materials, resulting in poor versatility. Utility Model Content

[0006] The purpose of this invention is to overcome the above-mentioned problems and provide a dual CCD alignment mechanism that is suitable for printing on both transparent and non-transparent sheets and has good versatility.

[0007] Another objective of this invention is to provide a screen printing machine.

[0008] The objective of this utility model is achieved through the following technical solution:

[0009] A dual CCD alignment mechanism includes an upper alignment mechanism and a lower alignment mechanism;

[0010] The upper alignment mechanism includes an upper alignment CCD camera, which is mounted on the transport mechanism; the lower alignment mechanism includes a lower alignment CCD camera, which is mounted below the printing table of the printing mechanism.

[0011] The working principle of the above dual CCD alignment mechanism is as follows:

[0012] During operation, the sheet-like substrate to be printed is placed on the printing table of the printing mechanism via a conveying mechanism. If the substrate is transparent, a lower alignment CCD camera located below the printing table identifies the label on the substrate to determine its position. If the substrate is opaque, an upper alignment CCD camera mounted on the conveying mechanism identifies the label on the substrate to determine its position. After alignment, the printing mechanism prints the substrate. Once printing is complete, the conveying mechanism transports the printed substrate to the next processing unit.

[0013] In a preferred embodiment of this utility model, both the upper alignment mechanism and the lower alignment mechanism further include annular fill lights, which are respectively positioned below the upper alignment CCD camera and above the lower alignment CCD camera.

[0014] In a preferred embodiment of this utility model, two upper-aligned CCD cameras and two lower-aligned CCD cameras are provided. The direction in which the two upper-aligned CCD cameras are arranged is perpendicular to the direction of the lateral transport of the conveying mechanism of the screen printing machine, and the direction in which the two lower-aligned CCD cameras are arranged is parallel to the direction in which the two upper-aligned CCD cameras are arranged.

[0015] In a preferred embodiment of the present invention, the printing table of the screen printing machine is provided with an alignment hole located above the lower alignment CCD camera, and a transparent plate is provided on the top of the alignment hole.

[0016] Furthermore, the length direction of the alignment hole is parallel to the direction in which the two lower alignment CCD cameras are arranged.

[0017] Furthermore, the lower alignment mechanism also includes a position adjustment structure for adjusting the position of the alignment camera. This position adjustment structure includes an adjustment drive motor and an adjustment lead screw module; the driving direction of the adjustment drive motor is parallel to the length direction of the alignment hole. This allows adjustment of the relative distance between the two lower alignment CCD cameras, applicable to printing materials of different sizes.

[0018] In a preferred embodiment of this utility model, the printing table of the screen printing machine is provided with multiple ventilation holes in other parts besides the transparent plate of the alignment hole, and a ventilation channel communicating with a negative pressure device is provided below the ventilation holes.

[0019] A screen printing machine includes a conveying mechanism for transporting a substrate, a dual CCD alignment mechanism for aligning the substrate, and a printing mechanism for printing on the substrate.

[0020] In a preferred embodiment of this utility model, the conveying mechanism includes a transverse moving frame and a transverse driving mechanism for driving the transverse moving frame to move laterally; the upper alignment CCD camera is mounted on the corresponding transverse moving frame.

[0021] Furthermore, the transport mechanism also includes a transport suction cup; the transport suction cup and the upper alignment CCD camera are mounted on a horizontal moving frame.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] 1. The screen printing machine of this utility model, by setting up an upper alignment CCD camera and a lower alignment CCD camera, is suitable for printing on both transparent and non-transparent sheets, and has good versatility.

[0024] 2. The upper alignment CCD camera is mounted on the transport mechanism, sharing a single drive mechanism, which simplifies the structure and does not occupy space on the printing table. Attached Figure Description

[0025] Figure 1 This is a simplified three-dimensional structural diagram of the dual CCD alignment screen printing machine of this utility model.

[0026] Figure 2 The top view of the printing table of the printing mechanism of this utility model conceals the table panel. Detailed Implementation

[0027] To enable those skilled in the art to fully understand the technical solution of this utility model, the present utility model will be further described below in conjunction with the embodiments and accompanying drawings, but the implementation of this utility model is not limited thereto.

[0028] See Figure 1-2 The dual-CCD aligned screen printing machine of this embodiment includes a conveying mechanism for transporting the printing substrate, a dual-CCD alignment mechanism for aligning the printing substrate, and a printing mechanism for printing on the printing substrate. The dual-CCD alignment mechanism includes an upper alignment mechanism and a lower alignment mechanism. The upper alignment mechanism includes an upper alignment CCD camera 1, which is mounted on the conveying mechanism. The lower alignment mechanism includes a lower alignment CCD camera 2, which is mounted below the printing table 3 of the printing mechanism.

[0029] See Figure 1-2 The upper alignment CCD camera 1 and the lower alignment CCD camera 2 are each provided in twos. The two upper alignment CCD cameras 1 are arranged in a direction perpendicular to the direction of the transverse transport of the transport mechanism, and the two lower alignment CCD cameras 2 are arranged in a direction parallel to the direction of the two upper alignment CCD cameras 1.

[0030] See Figure 1-2 The transport mechanism includes a transverse moving frame 4 and a transverse driving mechanism for driving the transverse moving frame 4 to move laterally; the upper alignment CCD camera 1 is mounted on the corresponding transverse moving frame 4.

[0031] Furthermore, the transport mechanism also includes a transport suction cup 5; the transport suction cup 5 and the upper alignment CCD camera 1 are mounted on the horizontal moving frame 4.

[0032] See Figure 1-2 Both the upper alignment mechanism and the lower alignment mechanism also include a ring-shaped fill light 6, which is respectively positioned below the upper alignment CCD camera 1 and above the lower alignment CCD camera 2.

[0033] See Figure 1-2 The printing table 3 of the printing mechanism is provided with an alignment hole 3-1 located above the lower alignment CCD camera 2, and a transparent plate is provided on the top of the alignment hole 3-1.

[0034] Furthermore, the length direction of the alignment hole 3-1 is parallel to the direction in which the two lower alignment CCD cameras 2 are arranged.

[0035] Furthermore, the printing table 3 of the printing mechanism is provided with multiple ventilation holes in other parts besides the transparent plate of the alignment hole 3-1, and a ventilation channel connected to the negative pressure device is provided below the ventilation holes.

[0036] See Figure 1-2 The lower alignment mechanism also includes a position adjustment structure for adjusting the position of the alignment cameras. This position adjustment structure includes an adjustment drive motor 7 and an adjustment lead screw module. The driving direction of the adjustment drive motor 7 is parallel to the length direction of the alignment hole 3-1. In this way, the relative distance between the two lower alignment CCD cameras 2 can be adjusted, which can be applied to printing materials of different sizes.

[0037] See Figure 1-2 The working principle of the above-mentioned dual-CCD aligned screen printing machine is as follows:

[0038] During operation, the sheet-like substrate to be printed is placed on the printing table 3 of the printing mechanism via a conveying mechanism. If the substrate is transparent, the lower alignment CCD camera 2 located below the printing table 3 identifies the label on the substrate to determine its position. If the substrate is opaque, the upper alignment CCD camera 1 mounted on the conveying mechanism identifies the label on the substrate to determine its position. After alignment, the substrate is printed by the printing mechanism. After printing, the printed substrate is transferred to the next processing mechanism via the conveying mechanism.

[0039] The above are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above content. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A dual CCD alignment mechanism, characterized in that, Including upper alignment mechanism and lower alignment mechanism; The upper alignment mechanism includes an upper alignment CCD camera, which is mounted on the transport mechanism; the lower alignment mechanism includes a lower alignment CCD camera, which is mounted below the printing table of the printing mechanism.

2. The dual CCD alignment mechanism according to claim 1, characterized in that, Both the upper alignment mechanism and the lower alignment mechanism also include a ring-shaped fill light, which is respectively positioned below the upper alignment CCD camera and above the lower alignment CCD camera.

3. The dual CCD alignment mechanism according to claim 1, characterized in that, The upper and lower alignment CCD cameras are each provided in twos. The two upper alignment CCD cameras are arranged in a direction perpendicular to the lateral transport direction of the screen printing machine's transport mechanism, and the two lower alignment CCD cameras are arranged in a direction parallel to the direction of the two upper alignment CCD cameras.

4. The dual CCD alignment mechanism according to claim 3, characterized in that, The screen printing machine has an alignment hole located above the lower alignment CCD camera on the printing table, and a transparent plate is provided on the top of the alignment hole.

5. The dual CCD alignment mechanism according to claim 4, characterized in that, The length direction of the alignment hole is parallel to the direction in which the two lower alignment CCD cameras are arranged.

6. The dual CCD alignment mechanism according to claim 4, characterized in that, The lower alignment mechanism also includes a position adjustment structure for adjusting the position of the alignment camera. The position adjustment structure includes an adjustment drive motor and an adjustment lead screw module. The driving direction of the adjustment drive motor is parallel to the length direction of the alignment hole.

7. The dual CCD alignment mechanism according to claim 4, characterized in that, The screen printing machine has multiple ventilation holes on the printing table, except for the transparent plate with the alignment hole. Below the ventilation holes is a ventilation channel that communicates with the negative pressure device.

8. A screen printing machine, characterized in that, It includes a handling mechanism for transporting printing materials, a dual CCD alignment mechanism as described in any one of claims 1-7 for aligning printing materials, and a printing mechanism for printing on printing materials.

9. The screen printing machine according to claim 8, characterized in that, The transport mechanism includes a transverse moving frame and a transverse driving mechanism for driving the transverse moving frame to move laterally; the upper alignment CCD camera is mounted on the corresponding transverse moving frame.

10. The screen printing machine according to claim 9, characterized in that, The transport mechanism also includes a transport suction cup; the transport suction cup and the upper alignment CCD camera are mounted on a horizontal moving frame.

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