Movable Shielding Plates for Blasting Agent Containment
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Solution Overview
Problem
Existing methods for cyclically shielding work chamber openings during the loading and unloading of workpieces in surface treatment processes are inefficient, as they either require significant setup times, high energy consumption, or fail to effectively contain blasting agents, leading to safety hazards and operational interruptions.
Innovation Solution
A method utilizing mechanically operated cross-over shielding elements, such as plate-shaped or cup-like elements, that are strategically placed and moved in conjunction with a conveyor device to intercept and deflect blasting agents, ensuring partial containment without the need for continuous sealing of the work chamber openings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the work chamber opening is sealed with template seals or blasting agent curtains, then blasting agent containment is improved, but device complexity and energy consumption increase
Solution Approach 1:
The patent employs dynamically movable shielding plates that can be positioned in front of the work chamber opening during workpiece exchange and retracted during blasting operations. This dynamic approach allows the same structure to serve both as an opening mechanism and a shielding mechanism, reducing overall device complexity while maintaining effective blasting agent containment when needed.
Solution Approach 2:
The shielding plates serve multiple functions: they act as shields during blasting operations to contain flying particles, and they can be moved aside to allow workpiece loading and unloading. This multi-functionality eliminates the need for separate sealing mechanisms, thereby reducing device complexity while maintaining containment effectiveness.
2Productivity
If the work chamber opening is kept open for continuous workpiece loading and unloading, then productivity is improved, but blasting agent containment deteriorates
Solution Approach 1:
The shielding plates are designed to be dynamically movable, allowing them to be positioned in front of the opening during blasting to contain particles, and moved aside during workpiece exchange to enable continuous loading and unloading. This dynamic positioning resolves the contradiction between maintaining containment and enabling continuous operation.
Solution Approach 2:
The shielding plates are periodically positioned in front of the opening during blasting operations and retracted during workpiece exchange. This periodic action allows the system to alternate between containment mode and loading/unloading mode, achieving both blasting agent containment and continuous productivity without compromise.
3Object-affected harmful factors
If blasting agent curtains are used to cover the opening, then blasting agent containment is improved, but energy consumption increases due to high mass turnover
Solution Approach 1:
The patent extracts the containment function from the continuous blasting agent curtain system and implements it through discrete, movable shielding plates. This eliminates the need for continuous high-mass blasting agent turnover, significantly reducing energy consumption while maintaining effective containment when the plates are in position.
Solution Approach 2:
Instead of maintaining a continuous, energy-intensive blasting agent curtain, the system uses discrete shielding plates that provide containment only when needed. This approach replaces the expensive, energy-consuming continuous curtain with simpler, intermittent shielding that achieves the same containment effect with minimal energy input.
4Object-affected harmful factors
If discontinuous blasting method is used with opening closure, then blasting agent containment is improved, but productivity deteriorates due to setup times
Solution Approach 1:
The dynamically movable shielding plates allow the system to maintain containment during blasting while enabling rapid workpiece exchange. The plates can be quickly positioned and retracted, eliminating the lengthy setup times associated with traditional opening closure methods and thereby improving overall treatment process efficiency.
Solution Approach 2:
The shielding plates are positioned in advance before blasting operations begin and are retracted before workpiece exchange is needed. This preliminary positioning ensures that containment is already in place when blasting starts, eliminating setup delays, while allowing immediate workpiece exchange when the plates are retracted, thereby improving productivity.
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 quasi-continuous operation with reduced setup times and energy consumption, effectively intercepting and deflecting blasting agents to enhance safety and operational efficiency during the loading and unloading of workpieces.
Implementation Method 1
a first shielding element 21 is placed on the conveyor device 10 in front of the workpiece 201 that faces the work chamber opening 25... the conveyor device 10 is moved in the conveying direction by a defined distance of movement... wherein the workpiece 201 is moved into the work chamber 20 and the shielding element 21 that is located directly behind in the conveying direction is placed directly in front of or into the work chamber opening 25
Data Source
AI summary
A method and apparatus for cyclically shielding a work chamber opening (25) when loading and unloading workpieces using a conveyor device (10) that passes through the work chamber opening. A first shielding element (21) is placed at a workpiece loading station (11.1), and a second shielding element (22) is placed behind a second workpiece placement location (11.2), as viewed in the conveying direction. When the first workpiece is loaded into the work chamber (20), the first shielding element (21) is placed at or in the work chamber opening (25) by advancing the conveyor device (10). The first shielding element (21) is then removed from the work chamber opening (25) and placed behind the second shielding element (22). These steps are repeated with subsequent workpiece placement locations (11.2, 11.3, . . . ) of the conveyor device (10) and with respective cross-over changes of the shielding elements (21, 22).