Casting Mold Multi-Level Feed Channels for Cylinder Blocks
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Solution Overview
Problem
Achieving optimal component properties in castings, particularly in cylinder blocks, where different areas require varying solidification rates, is challenging due to sensitive disturbances in the solidification process, leading to unreliable thermal center supply and directional solidification issues.
Innovation Solution
A casting mold design with additional feed channels that connect to different levels of the mold cavity, bypassing critical areas with heat sinks, ensuring even solidification by providing independent melt flow paths through contour-forming mold parts, which are thermally insulated to prevent premature solidification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If selective cooling is applied to achieve different solidification rates in different areas, then component properties are improved, but the solidification process is disrupted and directional solidification is no longer achievable
Solution Approach 1:
The mold cavity is divided into multiple levels (first level and second level) with separate feeding channels for each level. This segmentation allows independent control of molten metal supply to different regions, enabling selective cooling in specific areas while maintaining stable solidification in others through dedicated feed channels that bypass cooled zones.
Solution Approach 2:
A bypass channel is introduced as an intermediary path that allows molten metal to flow from the first level to the second level, circumventing the heat sink area. This intermediary channel ensures that thermal centers in the second level remain reliably supplied with molten metal even when selective cooling is applied in the first level, thus maintaining directional solidification.
2Speed
If heat sinks are used to accelerate solidification in specific areas, then solidification rate is improved, but reliable supply of heat to thermal centers is compromised
Solution Approach 1:
The feeding system is segmented into level-specific channels: a first feeding channel supplies the first level, and a second feeding channel supplies the second level. The second feeding channel is designed to bypass the heat sink area, ensuring that thermal centers in the second level receive reliable molten metal supply independent of the cooling action in the first level, thus maintaining both high solidification rate and reliable supply.
Solution Approach 2:
The feeding system transitions from a single-plane approach to a multi-level three-dimensional structure. By introducing vertical level separation with corresponding feed channels at different heights, the system can apply heat sinks in one level while maintaining reliable supply to thermal centers in another level through the bypass channel, resolving the contradiction between solidification speed and supply reliability.
3Stability of the object's composition
If directional solidification is maintained, then solidification process stability is improved, but selective cooling capability is reduced
Solution Approach 1:
The mold cavity is divided into multiple levels with dedicated feeding channels for each level. This segmentation enables directional solidification to be maintained in each level independently while allowing selective cooling to be applied in specific areas. The first feeding channel maintains directional solidification in the first level, while the second feeding channel with bypass capability enables selective cooling in the first level without compromising the second level's directional solidification.
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 design allows for complex castings with varying solidification rates across different areas, ensuring defect-free production of components like cylinder blocks with high strength requirements, by maintaining a reliable melt supply and preventing flow obstructions.
Implementation Method 1
the mold according to the invention is specifically designed for casting parts using gravity casting
Implementation Method 2
which are thermally insulated to prevent premature solidification
Implementation Method 3
Areas requiring rapid solidification are therefore selectively cooled
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a method for casting castings, wherein a metal melt is poured into a mold cavity (3), which is bounded by a casting mold (G1, G2) and represents the casting, via a feeder (2) or separate runners or casting channels, wherein the casting mold (G1, G2) comprises mold parts (4-7) that determine the shape of the casting to be cast, and a casting mold (G1, G2). The casting method according to the invention and the casting mold ensure the production of functionally correct and flawless castings even under the conditions explained above. According to the invention, this is achieved in that the melt is conducted into the mold cavity (3) via at least two connections, of which at least one is designed as an additional channel (16, 23) that leads through one of the mold parts and is independent of the contour of the casting to be cast, in at least two sections (8, 9, 10, 19, 20), which are associated with different levels of the casting to be cast.