Eccentric Press Beam for Book Block Spine Shaping
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Solution Overview
Problem
Existing devices for pressing book blocks often result in creases when the press bar is centrally placed, compressing the central printed sheet, or fail to adequately stabilize the curve in the block spine due to a loose contact, leading to reduced expansion and stabilization of the previously created curve.
Innovation Solution
The press beam is positioned eccentrically, with the carriage offset to one side of the block center, allowing it to sweep over the spine without compressing outer printed sheets, and utilizing a pivoted support bearing with a cushioning coupling rod for controlled rolling/pulling movements to apply pressure without unwanted sheet shifts, ensuring consistent contact and stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the press bar is placed centrally on the spine of the block, then the pressing force is evenly distributed, but the central printed sheet is compressed resulting in creases
Solution Approach 1:
The press beam is positioned off-center relative to the block spine, creating an asymmetric pressing arrangement. The press beam presses from one side only, avoiding direct compression of the central printed sheet while still achieving effective spine shaping through the asymmetric force application point.
2Object-affected harmful factors
If the press bar is positioned loosely in the center of the block spine, then crease formation is avoided, but the curve stabilization is insufficient
Solution Approach 1:
The support bearing is pre-positioned laterally offset from the center of the block spine before the pressing operation begins. This preliminary positioning ensures that the press beam contacts the block at an optimal off-center point that simultaneously provides adequate pressing force and proper curve stabilization without causing creases.
3Force
If the press beam is moved from above towards the middle of the block, then central compression is applied, but the previously created curve cannot be adequately stabilized
Solution Approach 1:
The press beam maintains an asymmetric, off-center position throughout the pressing operation rather than moving toward the center. This asymmetric positioning allows the application of sufficient pressing force to the spine while avoiding direct compression of the central printed sheet, thereby stabilizing the curve without creating creases.
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
This solution prevents creases and ensures the mushroom-like spine shape is maintained by avoiding compression of the central printed sheet, allowing for precise height adjustment and stabilization of the curve without sheet shifts, enhancing the quality of the book blocks.
Implementation Method 1
the support bearing is supported laterally against the action of disk spring assemblies as a spring element, creating a pressing force
Implementation Method 2
a cushioning coupling rod 22 which is supported laterally articulated on the frame
Data Source
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AI summary
The device has a guide (10), an eccentric shaft (11) and a drive rod (12) for lowering a pressing bar (9) onto a back (2a) of a book block (2) and for raising the pressing bar for a return stroke into an initial position. A slide (7) accommodates the pressing bar, and a pivoting position of the slide is formed as the eccentric initial position during the lowering of the pressing bar on the back of the book block, where the pivoting position is displaced with respect to a side of the center of the back of the block.