Adjustable Rotor Gap for Gypsum Slurry Mixing
Solution Overview
Problem
Existing gypsum board manufacturing processes face challenges with lump formation in mixers, which disrupt production by causing paper sheet breaks and requiring downtime for cleanup, and struggle to produce a range of desired thicknesses efficiently without excessive labor or downtime.
Innovation Solution
A mixing apparatus with an adjustable rotor and lid ring gap, allowing for dynamic adjustment of the circumferential gap between the rotor and lid ring to inhibit lump formation and maintain optimal slurry flow, enabling production of various gypsum board thicknesses with reduced downtime and labor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the circumferential gap between the rotor and lid ring is fixed, then the mixer structure is simple, but lump formation occurs and production must be interrupted for cleanup
Solution Approach 1:
The patent applies the dynamics principle by making the circumferential gap between the rotor and lid ring adjustable rather than fixed. The actuator system enables the rotor to move axially, dynamically changing the gap size to optimize mixing performance and prevent lump formation while maintaining continuous production.
Solution Approach 2:
The patent implements parameter changes by allowing the circumferential gap to be varied through actuator-driven axial movement of the rotor. This parameter adjustment capability enables optimization of slurry flow and mixing efficiency to eliminate lump formation without interrupting production.
2Reliability
If the circumferential gap is reduced to inhibit lump formation, then lump formation is reduced, but slurry flow may be restricted and productivity decreases
Solution Approach 1:
The actuator system enables dynamic adjustment of the circumferential gap, allowing the mixer to operate with an optimized gap size that prevents lump formation while maintaining adequate slurry flow rates for continuous high-productivity operation.
Solution Approach 2:
By changing the circumferential gap parameter through actuator-controlled axial movement, the system achieves optimal balance between lump prevention and slurry discharge rate, maintaining both high reliability and productivity.
3Manufacturing precision
If the mixer is shut down to adjust the gap for different product thicknesses, then the mixing parameters can be optimized, but production downtime increases
Solution Approach 1:
The actuator system allows the circumferential gap to be adjusted during continuous operation without shutting down the mixer. This dynamic adjustment capability enables optimization of mixing parameters for different product thicknesses while maintaining continuous production and eliminating downtime.
Solution Approach 2:
The patent enables continuous adjustment of the circumferential gap while the mixer operates, ensuring that the useful action of mixing continues uninterrupted. This allows manufacturing parameter optimization for different product specifications without loss of production time.
4Adaptability or versatility
If a fixed gap is used, then the device is easier to operate, but it cannot efficiently produce a range of desired thicknesses
Solution Approach 1:
The actuator-controlled adjustable gap provides adaptability for producing various product thicknesses by enabling on-the-fly parameter adjustment. The system maintains ease of operation through automated or controlled adjustment mechanisms that simplify the process of changing mixing parameters for different products.
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
The adjustable gap system effectively reduces lump formation and maintains adequate slurry flow, allowing for continuous production of gypsum boards with varying thicknesses without shutting down the line, thus increasing operational efficiency and extending mixer maintenance intervals.
Implementation Method 1
A rotor disposed within the mixing chamber is rotated about a normal axis to form an aqueous dispersion of the calcined gypsum
Implementation Method 2
The lid ring gap has a first value when the rotor is in the lowered position and a second value when the rotor is in the raised position
Data Source
AI summary
A mixing apparatus for producing aqueous calcined gypsum slurry includes a housing, a rotor assembly, and an actuator system. The housing defines a mixing chamber therewithin. A top lid of the housing includes a lid ring extending along a normal axis toward a bottom thereof. The rotor assembly includes a rotor disposed within the mixing chamber and a drive shaft extending along and rotatable about the normal axis. The rotor is rotatively coupled with the drive shaft and extends radially therefrom. The upper surface of the rotor and the lid ring are separated by a lid ring gap along the normal axis. The actuator system is arranged with the rotor assembly to selectively move the rotor over a range of travel along the normal axis between a lowered position and a raised position to selectively change the lid ring gap.