Venting Insert for Metal Casting Air Removal
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Solution Overview
Problem
Conventional metal casting devices experience air accumulation in high areas of the mold, leading to air residues and bubbles in cast products, and ventilation elements often become clogged with cast material, requiring time-consuming cleaning.
Innovation Solution
A ventilation insert made of good thermal conductivity material is surrounded by a poorly conducting material sleeve, with a through-channel for air discharge and a coolant channel for solidification, preventing heat transfer and clogging, and allowing easy removal of the cast fin during demolding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional ventilation elements (grooves, beans, pins) are provided in high areas of the mold, then air accumulation is reduced, but the ventilation elements become clogged with cast material requiring time-consuming cleaning
Solution Approach 1:
The ventilation system is segmented into two functional zones: an upper ventilation channel for air discharge and a lower cooling channel for material solidification. This segmentation allows the ventilation function to be separated from the casting material flow path, preventing clogging while maintaining effective air removal from the mold cavity.
Solution Approach 2:
The patent changes the thermal parameter of the ventilation insert by providing cooling channels that solidify casting material. This parameter change transforms the ventilation insert from a passive air passage to an active cooling element that prevents clogging by solidifying material before it can block the upper ventilation channels.
2Reliability
If ventilation channels are provided in high areas of the mold, then air discharge is improved, but heat transfer from the mold shell causes casting material to solidify and block the channels
Solution Approach 1:
The ventilation insert acts as an intermediary element between the mold shell and the ventilation channel. It provides a controlled thermal interface that allows selective solidification of casting material in the lower region while maintaining open upper channels for air discharge, thus mediating between heat transfer and air flow requirements.
Solution Approach 2:
The patent applies local quality by providing cooling channels only in specific regions of the ventilation insert. The lower portion has cooling channels for material solidification, while the upper portion remains open for air discharge. This localized application of cooling prevents blockage in critical areas without compromising ventilation function.
3Manufacturing precision
If the mold is cooled to solidify casting material, then casting quality improves, but the mold requires longer cooling time increasing production cycle
Solution Approach 1:
The cooling system applies partial cooling action by providing cooling channels only in the ventilation insert and specific mold regions rather than cooling the entire mold. This selective cooling solidifies casting material where needed for quality while minimizing overall cooling time, thus improving casting quality without significantly extending the production cycle.
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 configuration effectively prevents air accumulation and clogging, ensuring flawless castings with minimal downtime for cleaning, as the cast fin is easily removable and the mold is ready for immediate reuse.
Implementation Method 1
a sleeve made of poorly thermally conductive material surrounding the ventilation insert
Implementation Method 2
cooling of the ventilation insert is effected by the coolant channel that is preferably provided, so that the casting material flowing into the ventilation channel solidifies
Implementation Method 3
the casting material flowing into the ventilation channel solidifies. This creates a cast fin made of solidified material
Implementation Method 4
a continuous ventilation channel which connects the casting cavity to the ambient atmosphere
Data Source
Figure 1~2
Figure 3~7
Figure 8~11
AI summary
The invention relates to a device for producing metal castings with several mold segments (1, 2) that form mold shells and, in a casting position, seal around a casting cavity (3), wherein the mold shell, which has areas located locally high above the casting cavity (3) that form air collection areas, has a venting means in at least one of the high areas (4), wherein the venting means consists of a channel (6) opening into the air collection area (4) and penetrating the wall of the mold shell, into which a venting insert (7) made of a highly thermally conductive material with a sleeve (8) surrounding the venting insert (7) made of a poorly thermally conductive material is inserted and fixed, wherein the venting insert (7) has a coolant channel (9) closed to the casting cavity (3), which is connected at its ends (10, 11) opening outwards from the mold shell to a coolant transport device.and a continuous vent channel (12) that connects the casting cavity (3) to the ambient atmosphere.