Digital Printing Device Movable Door Suction Box
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Solution Overview
Problem
Traditional printing technologies face issues with poor sheet transportation accuracy and strict requirements, particularly with negative pressure suction methods, where the air door cannot be precisely adjusted to match the sheet width, leading to air leakage and inadequate suction.
Innovation Solution
A digital printing device equipped with a movable door system driven by screw rods and a transmission mechanism, allowing for precise adjustment of the suction box width to match the sheet, along with a feeding device and dust removal system to enhance printing accuracy and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a manual openable/closable air door is provided on the negative pressure suction box, then the device can be operated, but the air door can only roughly adapt to the width of the sheet while being opened and closed, causing air leakage and poor negative pressure suction effect
Solution Approach 1:
The patent transforms the static air door structure into a dynamic adjustable one by introducing a screw rod mechanism. The air door width can be dynamically adjusted by rotating the screw rod, which drives the air door to expand or contract horizontally. This allows the air door to adapt precisely to different sheet widths, eliminating air leakage while maintaining ease of operation.
2Device complexity
If the sheet is transported by roller suction transporting method, then the transporting process is simplified, but the accuracy of transporting will be poor and registration color accuracy between rollers will be relatively poor
Solution Approach 1:
The patent changes the key parameter of the suction system by making the air door width adjustable. By precisely matching the air door width to the sheet width, the suction force is optimized and uniformly distributed across the sheet surface. This improves transporting accuracy and registration precision without requiring complex multi-roller mechanisms.
3Device complexity
If the air door width is fixed and does not match the sheet width precisely, then the structure is simple, but air leakage occurs at suction holes on both sides of the sheet, causing poor negative pressure suction effect
Solution Approach 1:
The patent introduces a dynamic adjustment mechanism using a screw rod that can rotate to change the horizontal distance between the first and second air doors. This transforms the fixed-width air door into an adjustable-width air door, allowing precise matching to different sheet widths while maintaining structural simplicity.
Solution Approach 2:
The patent replaces manual adjustment methods with a mechanical screw rod mechanism. By rotating the screw rod, the air door position is precisely controlled through mechanical advantage, providing accurate and repeatable adjustment without requiring complex electronic control systems.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution improves sheet transportation accuracy and negative pressure suction effectiveness, enabling the handling of sheets with different specifications without air leakage, thus enhancing the overall printing process.
Implementation Method 1
at least one negative pressure first suction box (14), which is configured to suck the sheet on the transport belt (11) by negative pressure during transport
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A digital printing device, comprising a suction transport means (1). The suction transport means (1) comprises a transport belt (11) used for transporting a sheet material. At least one first suction box (14), which is used for sucking the sheet material on the transport belt (11) by means of negative pressure during transport, is provided in the space defined by the transport belt (11). Multiple first suction holes in communication with the first suction box (14) are provided on the transport belt (11). At least one side of the first suction box (14) is provided with a movable door (15) which moves in a direction perpendicular to the transport direction to make the first suction box (14) fit the sheet material to maintain a negative pressure state. By transporting sheet materials using the transport belt (11) during printing, the digital printing device avoids the problem of poor registration accuracy, and improves the printing effect. Moreover, by providing the movable door (15) on the first suction box (14), the present invention makes the width of the first suction box (14) to precisely fit the width of the sheet material, so that sheet materials of different specifications can be transported in corresponding negative pressure suction areas, thereby avoiding air leakage and bringing a good negative pressure suction effect.