Casting Device Emergency Stop Power Management
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Solution Overview
Problem
Existing casting apparatuses face challenges in achieving immediate restoration after an emergency stop, as shutting off power to actuators can result in molten metal coagulating and being difficult to remove, leading to prolonged recovery times.
Innovation Solution
A casting apparatus with an optical sensor that detects objects and controls power supply to drive units, allowing continuous mold closing and tilting position maintenance during the casting period, preventing molten metal from coagulating and enabling swift restoration by not shutting off power to the first drive unit and second drive unit when an object is detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power is shut off to actuators for emergency stop, then safety is improved, but restoration time increases
Solution Approach 1:
The system dynamically adjusts the emergency stop behavior based on the current operational phase. During the casting period (when molten metal is in the mold), the system maintains power supply to actuators to preserve mold closing force and tilting position, preventing premature mold opening. Outside the casting period, complete power shutdown is implemented for standard emergency stop safety. This dynamic control strategy resolves the contradiction by adapting the stop behavior to the specific operational context.
Solution Approach 2:
The control system changes the power supply parameter (on/off state) to the actuators based on the operational phase detection. By detecting whether the system is in the casting period through monitoring of drive unit operations, the control unit adjusts the power supply parameter accordingly - maintaining power during casting to prevent mold opening, and shutting off power outside casting for standard emergency response. This parameter change resolves the time-safety contradiction.
2Loss of energy
If power is completely stopped during casting period, then energy consumption is reduced, but molten metal coagulation is compromised
Solution Approach 1:
The system implements dynamic power management where the power supply state of actuators is adjusted based on the operational phase. During the casting period, power is maintained to preserve the tilting position and mold closing force, ensuring complete filling of molten metal and proper coagulation. Outside the casting period, power is shut off to reduce energy consumption. This dynamic adjustment resolves the contradiction between energy savings and casting quality.
3Reliability
If standard emergency stop is implemented, then safety response is improved, but production continuity is reduced
Solution Approach 1:
The system implements a dynamic emergency stop strategy that adapts to the operational phase. During the casting period, instead of complete power shutdown, the system maintains actuator power supply to preserve mold closing force and tilting position, enabling faster restoration and continuous production. Outside the casting period, standard emergency stop with complete power shutdown is applied for maximum safety response. This phased approach resolves the contradiction between safety response and production continuity.
Solution Approach 2:
The control system changes the emergency stop parameter (complete shutdown vs. partial maintenance) based on the operational phase detection. By monitoring whether the system is in the casting period through drive unit operation detection, the control unit adjusts the emergency stop parameter - maintaining power during casting for production continuity, and implementing complete shutdown outside casting for safety response. This parameter adaptation resolves the productivity-safety contradiction.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for speedy restoration of the casting apparatus even during emergency stops, preventing insufficient coagulation and mold opening, thus reducing recovery time.
Implementation Method 1
an optical sensor disposed in the periphery of the casting apparatus, and detecting an object
Implementation Method 2
The first drive unit moves either the upper mold or the lower mold up and down to open or close the upper mold and the lower mold
Implementation Method 3
The second drive unit tilts the upper mold and the lower mold which are closed by the first drive unit
Implementation Method 4
forms a casting by using an upper mold and a lower mold, which can be opened, closed, and tilted, into which molten metal is poured by using gravity
Data Source
AI summary
A casting apparatus includes a first drive unit closing or opening an upper mold and a lower mold, a second drive unit tilting the closed upper mold and lower mold, an optical sensor and a control unit. When the optical sensor detects an object during a casting period after molten metal is supplied to the upper mold and the lower mold tilted by the second drive unit until the molten metal is cooled, the control unit does not shut off power supplies to the first drive unit and the second drive unit, causes the first drive unit to continue mold closing and causes the second drive unit to hold the tilting position.