Quartz Glass Crucible Mold with Concentric Grooves
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Solution Overview
Problem
In the rotary molding method for manufacturing quartz glass crucibles, quartz powder tends to slide down and stick outside the prescribed range, leading to increased material usage and reduced productivity due to inefficient adhesion and longer collection times.
Innovation Solution
A mold with non-penetrating concentric grooves on its inner surface, specifically designed to catch and improve the adhesion of quartz powder, reducing sliding and allowing efficient deposition within the target area, using materials like stainless steel or carbon.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If quartz powder is blown onto the inner surface of a rotating mold, then the quartz powder can be deposited to form a crucible shape, but the quartz powder slides down and sticks outside the prescribed range, increasing material usage and collection time
Solution Approach 1:
The inner surface of the mold is segmented into multiple concentric groove regions, creating distinct zones that capture and retain quartz powder at specific positions. The grooves divide the continuous sliding path into segmented retention areas, preventing powder from moving outside the prescribed range.
Solution Approach 2:
The grooves are strategically positioned at specific locations on the inner surface to create local retention zones. This local modification of the surface structure provides targeted powder capture exactly where needed, improving deposition precision without affecting other areas.
2Manufacturing precision
If quartz powder is blown onto the inner surface of a rotating mold, then the crucible can be formed, but the operation time for collecting quartz powder outside the prescribed range increases, reducing productivity
Solution Approach 1:
By segmenting the inner surface into groove-based retention zones, the invention eliminates the need for extensive powder collection operations. Powder is captured locally within grooves, dramatically reducing the time required to collect and reuse powder outside the prescribed range.
Solution Approach 2:
The grooves on the inner surface automatically capture and retain quartz powder through their geometric structure, eliminating the need for external collection operations. The mold structure itself performs the powder retention function, improving productivity without additional operational steps.
3Ease of manufacture
If the inner surface of the mold is smooth, then the mold is easy to manufacture, but quartz powder slides down easily, requiring more powder and longer collection time
Solution Approach 1:
The groove structure segments the smooth inner surface into textured retention zones. These grooves are easily manufactured using conventional machining methods and provide effective powder capture, maintaining manufacturing simplicity while improving deposition precision.
Solution Approach 2:
Instead of making the entire inner surface complex, only localized groove features are added to specific areas where powder retention is needed. This local modification maintains overall manufacturing simplicity while achieving the desired precision improvement.
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 grooved mold design enhances quartz powder adhesion, reduces material usage, and shortens collection times, thereby improving productivity and reducing manufacturing costs.
Implementation Method 1
blowing quartz powder onto the inner surface of a straight body portion of the mold rotating at a high rate to deposit the quartz powder on the straight body portion by centrifugal force
Data Source
AI summary
A mold for manufacturing a quartz glass crucible by a rotary molding method, having a plurality of grooves that are concentric with respect to a mold rotation axis in at least a straight body portion of an inner surface of the mold, wherein the plurality of concentric grooves are non-penetrating grooves that do not penetrate the mold. This provides a mold for manufacturing a quartz glass crucible by a rotary molding method, having an inner surface made so that it is difficult for quartz powder to slide down when forming a quartz powder compact.