Rotating Pan Inversion Table for Continuous Bakery Cleaning
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Solution Overview
Problem
Current pan inverting systems in commercial bakeries are inefficient and prone to noise, as they rely on discrete movements and end-over-end flipping, which cannot handle high throughput volumes and can weaken pans due to free fall, while also being noisy and time-consuming.
Innovation Solution
A rotating table system with independently operable conveyors on both sides, allowing pans to be securely fastened and inverted in 180-degree increments, enabling continuous operation and efficient pan inversion and cleaning without the need for lateral guides or significant noise generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If discrete movements and end-over-end flipping are used to invert pans, then the inversion process is simple in mechanism, but the throughput is low and cannot handle high-volume production
Solution Approach 1:
The system employs continuous conveyor belts that move pans through the inversion process without stopping, eliminating the discrete stop-start movements of traditional systems. The conveyor system operates continuously, feeding pans into the inversion chamber and removing them after inversion, thereby maintaining high throughput while managing complexity through standardized conveyor components
Solution Approach 2:
The inversion process is divided into distinct functional zones: a loading zone where pans are placed on the conveyor, an inversion zone where the 180-degree rotation occurs, and an unloading zone where inverted pans are removed. This segmentation allows each zone to be optimized independently while maintaining overall system continuity and high productivity
2Duration of action of stationary object
If pans are allowed to free fall during inversion, then the mechanism is simpler, but the pans are weakened and their lifespan is reduced
Solution Approach 1:
The system uses support surfaces and controlled deceleration mechanisms that prepare for and cushion the pan's movement throughout the inversion process. Instead of allowing free fall, the conveyor system maintains support under the pans during rotation, and cushioning elements are positioned to absorb any impact forces, thereby protecting pan integrity without requiring overly complex active control systems
Solution Approach 2:
The system replaces the traditional mechanical flip mechanism with a conveyor-based transport system that uses friction and controlled motion rather than free fall and impact. This substitution eliminates the shock loading associated with end-over-end flipping while using simpler, more reliable conveyor components that can be precisely controlled to prevent pan damage
3Productivity
If pans are stacked right-side up to minimize space, then storage efficiency is improved, but dirt can fall into pan recesses and the load stresses delicate inner surfaces
Solution Approach 1:
The system inverts the traditional storage orientation by stacking pans upside down rather than right-side up. This inversion prevents dirt from falling into pan recesses during storage and allows the robust outer surfaces to bear the stacking load rather than the delicate inner surfaces. The conveyor system is designed to handle and position inverted pans, making this orientation practical for both storage and processing
4Ease of operation
If traditional pan inverting systems are used, then the system is simpler to operate, but significant noise is generated by pans striking surfaces
Solution Approach 1:
The system converts the potentially harmful impact that causes noise into a controlled, cushioned process. By using conveyor belts and support surfaces throughout the inversion journey, the system eliminates the striking action that generates noise. The controlled deceleration and support mechanisms transform what would be a noisy impact event into a quiet, controlled transfer operation
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 system achieves high-volume pan inversion and cleaning with reduced noise and increased pan lifespan by rotating pans around a central axis parallel to the conveyor direction, allowing for continuous operation at rates exceeding 30 pans per minute, and can be adapted for various industrial processes.
Implementation Method 1
a rotating table having substantially parallel pan-receiving surfaces on opposite sides of the table... the table being rotatably mounted within a static frame for rotation about a longitudinally extending axis of rotation
Implementation Method 2
a conveyor disposed on each of said pan-receiving surfaces of the table, each said conveyor being independently operable to displace pans along the corresponding pan-receiving surface in a direction substantially parallel to said longitudinally extending axis of rotation
Implementation Method 3
a pan engagement mechanism disposed within the table and operable to releasably fasten the pans to either of said pan receiving surfaces of the table
Data Source
AI summary
A pan inverting system (10) comprises a rotating table (11) having a central longitudinal axis (13), the table being rotatably mounted within a static frame (15) for rotation about the longitudinal axis (13). Conveyors (21) are disposed on opposed pan-receiving surfaces (20) of the table (11). The conveyors (21) are independently operable to displace a pan (12) along the table (11) in a direction substantially parallel to the longitudinal axis (13). A pan engagement device (24) within the table (11) is operable to releasably fasten the pan (12) to the pan receiving surface (20) of the table (11), such that when the pan (12) is fastened to one of the pan receiving surfaces (20) by the pan engagement mechanism (24), rotation of the table (11) about the longitudinally extending axis (13) will invert the pan (12). The table (11) may also equipped with air headers (507), nozzles and/or air knives (508) to clean the pans (12), for example during the rotating operation, by injecting cleaning air jets onto the surfaces of the pan (12).