Meat Grinder Dynamic RPM Control for Frozen Block Overload
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Solution Overview
Problem
Meat grinders often shut down due to overload when processing frozen meat blocks, leading to reduced profitability and high maintenance costs, and existing systems are prone to accidents and quality issues due to manual operation of bone/sinew/gristle separators.
Innovation Solution
A meat grinder with a method to automatically adjust the RPM of the rotating processing worm based on pressure creation in the process unit, using a control unit to differentiate between fresh and frozen meat, and a single infeed device to prevent accidents, while optimizing torque and throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the grinder runs at fixed high rpm to maximize throughput, then productivity is improved, but the grinder shuts down due to overload when processing frozen meat blocks
Solution Approach 1:
The patent applies dynamics by making the RPM of the processing worm adjustable rather than fixed. The control system dynamically changes the rotational speed based on detected meat conditions - running at higher RPM for fresh meat to maximize throughput, and automatically reducing RPM when frozen meat blocks are detected to prevent overload shutdowns.
Solution Approach 2:
The patent changes the operational parameter (RPM) based on the state of the processed material. By detecting whether fresh or frozen meat is being processed, the system adjusts the rotational speed parameter accordingly - maintaining high speed for fresh meat and reducing speed for frozen meat to avoid overloading while preserving cutting effectiveness.
2Reliability
If the grinder is replaced with a gearbox running at lower rpm to handle frozen meat blocks, then overload is prevented, but capacity decreases when soft/fresh meat is ground
Solution Approach 1:
Instead of using a fixed low-RPM gearbox configuration, the patent implements a dynamic RPM adjustment system that adapts the rotational speed to the processing needs. The control system detects the meat type and automatically adjusts RPM - using lower speeds for frozen meat to prevent overload and higher speeds for fresh meat to maximize capacity and throughput.
3Device complexity
If manual operation of bone/sinew/gristle separator valve is used, then device complexity is reduced, but accidents and quality issues occur due to operator error
Solution Approach 1:
The patent implements feedback control for the bone/sinew/gristle separator valve. The control system receives feedback about the processing conditions and meat type, and automatically adjusts the valve position accordingly - opening it when fresh meat is detected to allow separator function, and closing it when frozen meat is detected to prevent damage, thereby eliminating operator error while maintaining manageable system complexity.
Solution Approach 2:
The system performs self-service by automatically controlling the separator valve based on detected conditions. The control unit monitors the processing state and autonomously opens or closes the valve without requiring manual operator intervention, making the system self-regulating and eliminating human error in valve operation.
Data Source
AI summary
A method to grind meat in a grinder, includes: providing the meat to the grinder via a hopper where the hopper includes a feeder worm for feeding the meat to a process unit. The process unit has a rotating processing worm and a cutting set. The rotating processing worm can receive the meat from the feeder worm and convey it to the cutting set, which grinds the meat. The method involves automatically adjusting the revolutions per minute of the rotating processing worm in response to a pressure creation in the process unit.