Saddle Stitcher Stop Mechanism for Printed Product Stabilization
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Solution Overview
Problem
In existing printing solutions, printed products experience center offset, slant, and undefined transport phase issues due to kinetic energy and lack of stabilization during delivery, leading to positioning variability and potential tilting moments.
Innovation Solution
A system featuring a roof-shaped transport chain with an adjustable stop and an ejector, controlled by a main controller, which stabilizes printed products by eliminating kinetic energy and preventing tilting through dynamic positioning and sensor feedback, ensuring precise alignment and central ejection into a cutting apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If printed products are simply ejected into the delivery system without stabilization, then the process is simple and fast, but the horizontal position varies by +/−a few millimeters due to kinetic energy causing slip
Solution Approach 1:
The printed product is braked to a standstill before ejection by the delivery system. This preliminary braking action removes kinetic energy that would otherwise cause the product to slip and vary in horizontal position during transport, thereby ensuring precise positioning without compromising ejection efficiency
Solution Approach 2:
An intermediate braking mechanism is introduced between the collection point and the delivery system ejection. This intermediary component absorbs the kinetic energy of the printed product before it enters the delivery system, preventing position variability while maintaining overall process efficiency
2Productivity
If printed products are transported with kinetic energy into the conveyor belts, then the transport process is continuous and efficient, but a tilting moment or torque is generated causing slant
Solution Approach 1:
The printed product is braked to a standstill before being picked up by the conveyor belts. This preliminary action eliminates kinetic energy that would create tilting moments during the direction change in the delivery system, ensuring the product remains stable and properly oriented throughout transport
Solution Approach 2:
A braking force is applied in advance to counteract the kinetic energy that would otherwise generate unwanted tilting moments. This preliminary anti-action prevents the slanting effect before it occurs, maintaining product stability during the continuous transport process
3Manufacturing precision
If the printed product is braked to standstill before ejection, then positioning precision is improved, but the cycle time increases
Solution Approach 1:
The braking and ejection processes are integrated into a continuous cyclic operation. While one product is being braked, the delivery system is already positioned and ready for the next product, ensuring that the braking action does not create idle time and maintaining high overall productivity
Solution Approach 2:
The braking and ejection occur in a rhythmic cyclic pattern synchronized with the delivery system. This periodic action ensures that braking is performed at optimal intervals, minimizing the time impact while maintaining precise positioning for each product
Data Source
AI summary
A system, preferably a saddle stitcher, includes: a transport chain, which is roof-shaped in an upper region, along which one or more printed products is astride transportable, collected, and are optionally stapled in an intermediate stapling station; and a stop adjustable according to a format of a printed product of the printed products, the stop being arranged in a transport direction of the printed product, behind the stapling station, and along a further course of the transport chain. The stop is in operative connection with a delivery system and an ejector that operate interdependently with each other to perform a format-stabilized discharge of the printed product in accordance with a cycle; and that the format-stabilized printed product is fed to a cutting apparatus.