Flaskless Mold Making Device Gas Venting Mechanism
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Solution Overview
Problem
Conventional flaskless mold making methods face challenges in achieving high-quality castings efficiently due to gas defects, necessitating an apparatus and method that can improve mold making efficiency and quality in a short timeframe.
Innovation Solution
A flaskless mold making apparatus comprising two pairs of upper and lower molding flasks, a flask turning mechanism, a match plate, squeeze plates, a sand tank, a squeeze mechanism, an extracting mechanism, and a hole forming mechanism that forms gas venting holes in the mold, enabling efficient and high-quality mold production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional flaskless mold making methods are used to produce molds efficiently, then production time is reduced, but gas defects occur in castings leading to quality failures
Solution Approach 1:
The hole forming mechanism performs preliminary action by creating gas venting holes in the mold during the mold making process, before the actual casting process occurs. This preventive measure ensures that gas can escape during casting, eliminating gas defects and improving casting quality while maintaining efficient production timelines
2Reliability
If gas venting holes are formed in the mold, then casting quality is improved by preventing gas defects, but additional process steps are required
Solution Approach 1:
The hole forming mechanism is merged with the existing mold making apparatus, specifically integrating it into the flaskless mold making system. The drill member is positioned to operate within the existing workspace, and the control system coordinates the hole formation with other mold making operations, thereby adding the gas venting function without significantly increasing overall apparatus complexity
Solution Approach 2:
The hole forming mechanism with the drill member serves multiple functions: it creates gas venting holes to prevent gas defects, and can potentially be used for other positioning or alignment purposes during mold making. This multi-functionality justifies the added complexity by providing versatile capabilities within the apparatus
3Reliability
If a drill member is used to form holes in the mold, then gas venting capability is provided, but the apparatus requires additional components
Solution Approach 1:
The pushing member serves as an intermediary component that facilitates the operation of the drill member. It positions and supports the drill member during hole formation, and can be retracted to allow the drill to pass through. This intermediary mechanism enables the drill member to perform its gas venting function effectively while maintaining a relatively simple overall structure through coordinated motion of existing components
Data Source
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AI summary
A flaskless mold making apparatus comprises: two pairs of upper and lower molding flasks 4, each pair consisting of an upper molding flask 2 and a lower molding flask 3; a flask turning mechanism 5 for turning the two pairs of upper and lower molding flasks to move the flasks into two stations consisting of a mold making station and a mold extraction station; a match plate 6; a pair of squeeze plates 7, 8; a sand tank 9; an extracting mechanism 15; and a hole forming mechanism 80 provided at a position in the mold extraction station and configured to form a hole or a plurality of holes in a mold in the upper molding flask out of the upper and lower molding flasks having been moved to the position.