Rotating Workpiece Holder for Compact Abrasive Blasting Cabin
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Solution Overview
Problem
Conventional sandblasting cabins for painting preparation, especially for large motor vehicle parts like bumpers, require enormous sizes due to the need for a suitable distance between the jet nozzle and the workpiece, leading to high energy consumption, complex setup, and contamination issues.
Innovation Solution
A compact sandblasting device that rotates the workpiece on its longitudinal axis within a small cabin, maintaining a consistent distance between the jet nozzle and the workpiece surface, allowing for efficient processing of large workpieces with reduced cabin size and energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional walk-in booth is used to accommodate large workpieces like bumpers, then the entire surface can be accessed for blasting, but the cabin size becomes enormous requiring large air volumes and high energy consumption
Solution Approach 1:
The workpiece holder is designed to rotate the workpiece around its longitudinal axis during the blasting process. This dynamic movement allows the blasting nozzle to access the entire surface of large workpieces like bumpers from a fixed, compact cabin position, eliminating the need for enormous cabin sizes while maintaining complete surface accessibility and reducing energy consumption associated with large air volumes
2Use of energy by moving object
If the cabin size is reduced to lower energy consumption, then the distance between the blasting nozzle and workpiece surface must be maintained, but this limits access to the entire workpiece surface
Solution Approach 1:
The workpiece holder rotates the workpiece around its longitudinal axis, allowing the blasting nozzle to access the entire surface from a fixed compact position. This dynamic rotation enables complete surface coverage without requiring large cabin dimensions or compromising the optimal distance between nozzle and surface, thereby reducing energy consumption while maintaining accessibility
Solution Approach 2:
The invention introduces rotational movement in a third dimension (around the longitudinal axis) to solve the accessibility problem. By rotating the workpiece rather than moving the nozzle in multiple directions, the system achieves complete surface access from a fixed, space-efficient cabin position, reducing the required cabin volume and associated energy consumption
3Volume of stationary object
If a compact cabin is used to reduce space and energy consumption, then the extraction system requires less air volume, but the dust load must be minimized quickly to prevent contamination
Solution Approach 1:
The workpiece holder rotates the workpiece continuously during the blasting process, ensuring uniform and continuous exposure of all surfaces to the blasting media. This continuous action maintains consistent processing quality while the compact cabin design reduces the overall dust load volume, allowing the extraction system to manage contamination more effectively without requiring excessive air volumes
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 compact design reduces energy consumption and minimizes contamination by allowing for efficient air handling and dust removal, enabling continuous processing without interruptions and improving the overall efficiency of the sandblasting process.
Implementation Method 1
During the blasting process, a powerful air jet is generated and used to accelerate the blasting media
Implementation Method 2
the blasting media, such as corundum, garnet sand, slag, cast steel, or glass beads, which impact the surface to be treated at high speed
Implementation Method 3
Surface particles are dislodged and subsequently removed by the abrasive blasting action
Data Source
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AI summary
The invention relates to an abrasive blasting device (10) for matting a workpiece using a suitable abrasive, which flows out of a cabin (12) of the device during the operation by means of a blasting nozzle under pressure. The invention is characterized in that the device has a workpiece holder (20) comprising a support frame (24) held in a rotary mount (22), on which holding means for fixing a workpiece are provided, which holding means are movably attached to the support frame so that when the support frame (24) is pivoted in the rotary mount (22), a workpiece to be processed can be rotated or pivoted about a selectable axis of rotation by adjusting the position of the respective holding means in the cabin space.