Thickness-Variable Printed Product Supply Belt Adjustment
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Solution Overview
Problem
Existing systems cannot efficiently handle printed products of varying thicknesses within a single production run, as they require manual or automated adjustments that are fixed once set, limiting the ability to process products with different thicknesses simultaneously.
Innovation Solution
A belt transport device with a stepped roller and compensation roller system that adjusts the height of the upper conveyor belt mechanically based on the thickness of each printed product, ensuring continuous and independent adjustment of the belt transport device to match the product thickness, allowing for automatic and precise alignment and clamping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the distance between upper and lower conveyor belts is fixed for a specific thickness, then cutting accuracy is improved, but the ability to process printed products with different thicknesses is worsened
Solution Approach 1:
The conveyor belt system is made dynamically adjustable through a servomotor-driven axis that automatically modifies the distance between upper and lower conveyor belts based on the detected thickness of each printed product, allowing the system to adapt to varying thicknesses while maintaining optimal clamping force and cutting accuracy for each product type
Solution Approach 2:
The system changes the physical parameter of conveyor belt separation distance according to the thickness parameter of the printed product being processed. A sensor detects the product thickness and triggers automatic adjustment of the upper conveyor belt position, ensuring the clamping force and spacing are optimized for each specific product thickness without manual intervention
2Manufacturing precision
If manual or automated axis adjustment is used to set the conveyor belt distance, then precise thickness setting is improved, but production efficiency is worsened due to fixed settings requiring readjustment for different thicknesses
Solution Approach 1:
The manual or fixed automated mechanical adjustment system is replaced with an automated sensor-based detection and control system. Optical or contact sensors measure the printed product thickness in real-time, and a control unit automatically actuates the servomotor to adjust the conveyor belt spacing, eliminating the need for manual intervention and fixed preset adjustments between different product batches
Solution Approach 2:
A feedback loop is established where sensors continuously monitor the thickness of printed products entering the cutting apparatus, and this information is fed back to the control system which automatically adjusts the upper conveyor belt position accordingly. This closed-loop control ensures optimal settings are maintained dynamically without production stoppages for readjustment
3Manufacturing precision
If printed products are released before mechanical stops for alignment, then alignment accuracy is improved, but production speed is worsened due to the need to lower and raise belts
Solution Approach 1:
The conveyor belt system dynamically adjusts its operational state based on the position of printed products. The upper conveyor belt is selectively lowered only in the specific zone where alignment with mechanical stops is required, while remaining raised in the transport and cutting zones to maintain clamping and enable continuous high-speed operation, thus achieving both precise alignment and high production speed
Data Source
Figure 1~3
Figure 2a~2b
Figure 2c~2f
AI summary
The invention relates to a device for feeding printed products (4) of varying thicknesses to a downstream cutting device. These printed products may be stapled, partially stapled, or unstitched, or bound using an adhesive binder or thread-sewing machine. The feeding of the printed products is carried out by a feeding device comprising at least one upper and one lower conveyor belt (2, 6), which together form a conveyor belt pair. While the lower conveyor belt (2) has a stationary or quasi-stationary conveying plane, the upper conveyor belt (6) is operatively connected to a belt transport device, which directly adjusts the height of the upper conveyor belt depending on the thickness of the printed product being conveyed. The upper conveyor belt, in conjunction with the lower conveyor belt, conveys the printed product by exerting a pressure force on it.