Supply Conveyor Speed Matching for Precise Article Layer Transfer
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Solution Overview
Problem
Existing feeding devices struggle with inefficiencies in the formation and transfer of article layers, particularly in terms of speed and precision when transferring to downstream devices like palletizing devices.
Innovation Solution
The method involves using continuously running infeed and intermediate conveyors to form article layers according to a placement pattern, with the intermediate conveyor accelerating to match the outfeed conveyor's speed during transfer, ensuring the article layer is maintained and transferred at a higher speed to the downstream device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the intermediate conveyor runs continuously at a constant speed, then the article layer formation is stable, but the transfer speed to the outfeed conveyor is limited
Solution Approach 1:
The intermediate conveyor's speed is made variable rather than constant. The control unit adjusts the intermediate conveyor's speed dynamically: running at a first speed during article layer formation to maintain stability, and at a second (higher) speed during transfer to the outfeed conveyor to increase throughput. This dynamic speed adjustment resolves the contradiction between stable formation and fast transfer.
Solution Approach 2:
The operational parameters of the intermediate conveyor are changed based on the process stage. The conveyor switches between two distinct speed parameters: a lower speed for formation stability and a higher speed for transfer efficiency. This parameter change allows the system to optimize performance for each specific operational phase, achieving both stable formation and high-speed transfer.
2Productivity
If the intermediate conveyor accelerates to match outfeed conveyor speed during transfer, then the transfer efficiency increases, but the control complexity increases
Solution Approach 1:
The control unit monitors the operational state of the intermediate conveyor and automatically adjusts its speed based on the transfer phase. This feedback mechanism simplifies the overall control architecture by using a centralized controller that coordinates speed changes, rather than requiring complex distributed control systems. The throughput increases through automated speed adjustment while control complexity is managed through a unified control approach.
Solution Approach 2:
The intermediate conveyor operates in periodic cycles, alternating between formation phase (lower speed) and transfer phase (higher speed). This periodic operation pattern simplifies control logic by creating predictable, repeating sequences that are easier to manage than continuous variable speed control. The productivity improves through these accelerated transfer phases while maintaining manageable control complexity through rhythmic operation.
3Productivity
If the outfeed conveyor runs at higher speed continuously, then the throughput increases, but the precision of article layer transfer decreases
Solution Approach 1:
The intermediate conveyor is accelerated to match the outfeed conveyor's speed before the actual transfer begins. This preliminary speed synchronization ensures that when the article layer is transferred, both conveyors are moving at compatible speeds, maintaining transfer precision. The throughput benefit is achieved because the outfeed conveyor can run at higher overall speeds, while the preliminary action prevents precision loss during the critical transfer moment.
Solution Approach 2:
The outfeed conveyor's speed is dynamically adjusted relative to the intermediate conveyor during the transfer operation. Rather than running at a constantly high speed, the outfeed conveyor synchronizes its speed with the intermediate conveyor during the critical transfer phase, then resumes higher speed operation afterward. This dynamic speed matching maintains transfer precision while allowing the system to operate at higher throughput levels overall.
Data Source
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AI summary
The invention relates to a method and a device for operating a supply device (10), comprising at least one feed conveyor (16, 18, 20), at least one intermediate conveyor (24, 26), a discharge conveyor (54), and at least one handling device (30, 32, 34). Individual products (12) are continuously conveyed to a working region (36, 38, 40) of the at least one handling device (30, 32, 34) by the at least one feed conveyor (16, 18, 20); The products (12) are moved from the at least one feed conveyor (16, 18, 20) onto the at least one continuously running intermediate conveyor (24, 26) by the at least one handling device (30, 32, 34) in order to form an article layer (14) according to a placement pattern (48); and the article layer (14) is transferred from the at least one intermediate conveyor (24, 26) to the discharge conveyor (54), wherein during the transfer of the article layer (14), the at least one intermediate conveyor (24, 26) and the discharge conveyor (54) run at the same speed, and the discharge conveyor (54) is accelerated to a discharge speed after the article layer (14) has been formed, said discharge speed being faster than the transfer speed.