Rotary Drum Cooling Air Guide Segmentation
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Solution Overview
Problem
Existing rotary drum printing apparatuses with integral air guide members face challenges in cooling efficiency, increased manufacturing complexity, and weight, leading to higher costs and handling difficulties.
Innovation Solution
A printing apparatus with a rotary drum featuring a retrofitted air guide member having multiple guides that direct cooling air to specific regions on the drum's inner surface, improving cooling efficiency while allowing for lighter materials and reduced weight, and an additional cooling unit for the outer surface to enhance overall cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an air guide member is integrally formed with the drum, then the cooling air can be guided to the inner circumferential surface, but the degree of difficulty in forming a casting mold increases and the cost becomes higher
Solution Approach 1:
The air guide member is separated from the drum body and made as a detachable component. This allows the drum to be manufactured using standard casting molds while the air guide member can be separately fabricated and installed, reducing mold complexity and manufacturing cost while maintaining the cooling function.
Solution Approach 2:
The air guide member is extracted as a separate functional component from the integrated drum structure. This enables independent manufacturing of the air guide member using simpler processes, avoiding the need for complex integrated casting molds while preserving the air guiding functionality.
2Reliability
If an air guide member is integrally formed with the drum, then the cooling air can be guided to the inner circumferential surface, but the weight of the drum itself becomes heavier
Solution Approach 1:
By segmenting the air guide member from the drum body, the overall weight distribution is optimized. The air guide member can be made from lighter materials or with optimized geometry that achieves the same cooling function with reduced weight compared to an integrated metal drum structure.
3Reliability
If an air guide member is integrally formed with the drum, then the cooling air can be guided to the inner circumferential surface, but handling of the drum becomes more difficult
Solution Approach 1:
The detachable air guide member allows the drum to be handled in its basic form, which is lighter and easier to manipulate. The air guide member can be attached or removed as needed, providing operational flexibility and ease of handling compared to a permanently integrated heavy structure.
4Device complexity
If the air guide member is provided inside the drum, then the cooling air can be directed, but the configuration does not provide a sufficient cooling effect
Solution Approach 1:
The air guide member is designed with specific local features including multiple air guide portions that direct cooling air to different regions of the drum's inner circumferential surface. This localized air distribution ensures comprehensive cooling coverage that overcomes the insufficient cooling effect of simple internal air guide configurations.
Solution Approach 2:
The air guide member extends in the axial direction of the drum, creating a three-dimensional air distribution system. This axial extension allows cooling air to reach multiple levels of the drum's inner surface, providing sufficient cooling coverage that two-dimensional or simple linear air guides cannot achieve.
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 solution effectively cools the rotary drum, reducing temperature increases and maintaining printing quality, while simplifying manufacturing and reducing the apparatus's weight and cost.
Implementation Method 1
a first cooling fan configured to supply air into a passageway of the air in a direction along the rotary shaft
Implementation Method 2
a first cooling fan configured to supply air into a passageway of the air
Data Source
AI summary
A printing apparatus includes a rotary drum that is provided with a cylindrical body, a rotary shaft, and arm portions, an ejecting unit, a first cooling fan that uses a section formed in the circumferential direction between the arm portions as a passageway of air and that supplies the air, and a first air guide member that is retrofitted to the passageway of the air. The first air guide member is provided with a number a of first guides, a being an integer of 2 or more. The number a of the first guides are configured to guide the air from the first cooling fan to regions that are different positions of the inner surface of the cylindrical body and that are obtained by dividing up the inner surface of the cylindrical body by the number a in the direction along the rotary shaft.