Food Processing System Two-Step Ramp-Up Control
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Solution Overview
Problem
Existing food-processing systems face challenges in maintaining high processing speeds and material throughput due to issues like bursting casings, flailing or bouncing of linked strands, and inefficiencies in handling the ends of the strands, which require manual intervention and complex adjustments, limiting their efficiency and scalability.
Innovation Solution
A food-processing system utilizing separate servo motors for each driven component, synchronized to implement a two-step ramp-up method that controls the speed of the metering pump, linker, and conveyor, allowing for precise control and adaptation to different products and conveyor systems, thereby stabilizing the pressure and momentum of the linked strands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the system ramps up to high speed quickly to increase productivity, then processing speed improves, but the food material bursts the casing due to excessive pressure
Solution Approach 1:
The system implements a dynamic two-step ramp-up method where the metering pump and linker operate at different speeds during different phases. During the first ramp-up phase, the metering pump runs at a lower speed to prevent overpressurization and casing burst, while during the second phase, both components synchronize at higher speeds for normal production, making the speed profile adaptive rather than static
Solution Approach 2:
The system performs a preliminary ramp-up phase before full-speed operation, where the metering pump initially operates at reduced speed to safely fill the first link without bursting the casing. This preliminary action prepares the system for subsequent high-speed operation while preventing material loss and ensuring reliable start-up
2Productivity
If the system operates at high speed to increase throughput, then productivity improves, but the unsecured end of the strand flails and bounces off the hook requiring manual intervention
Solution Approach 1:
The system performs preliminary actions during the first ramp-up phase by securing the first link to the conveyor hook at a controlled lower speed before accelerating to full speed. This ensures the strand is properly anchored before high-speed operation begins, preventing flailing and eliminating the need for manual intervention during normal throughput operation
Solution Approach 2:
The system applies preliminary anti-action by controlling the metering pump speed during the first ramp-up phase to prevent excessive momentum that would cause the unsecured end to flail. By limiting the initial speed, the system counteracts the tendency for the strand to bounce off the hook, ensuring stable operation without manual correction
3Productivity
If the system operates at high speed to increase productivity, then output improves, but overpressure causes meat to leak from the stuffing tube at the last link
Solution Approach 1:
The system implements periodic action through the two-step ramp-up method, where the metering pump operates at reduced speed during the first ramp-up phase and then transitions to synchronized high-speed operation during the second phase. This periodic speed variation prevents overpressure buildup during critical phases while maintaining high output during stable operation
Solution Approach 2:
The system uses dynamic speed control where the metering pump speed is continuously adjusted based on the operational phase. During the first ramp-up, the pump runs slower to prevent overpressurization and meat leakage at the last link, while during the second ramp-up, both pump and linker operate at matched high speeds for maximum productivity without leakage
Data Source
Figure 1
Figure 2~3A
Figure 3B
AI summary
A food-processing system having a metering pump for filling a casing with food material, a linker for forming links in the filled casing and depositing a linked strand on a conveyor, and a plurality of servo motors arranged to drive each of a plurality of driven components of the processing system. The food-processing system being implemented according to a two-step ramp-up method that enables increased control of a first end and a second end of the linked strand using a first speed, and enables faster processing of the linked strand between the ends at a second speed higher than the first speed.