Modular GOS Ceramic Scintillator Mold Design
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Solution Overview
Problem
Current uniaxial pressure sintering molds for manufacturing GOS ceramic scintillators have a short retirement period and result in material waste due to stress concentration and the need for uniform pressure distribution, leading to mold damage and increased production costs.
Innovation Solution
A modular hot-pressing mold comprising a female outer sleeve with internal female blocks forming a composite structure and male pressing heads, allowing for the direct manufacturing of GOS ceramic scintillators in specific shapes by assembling separate components, which can be replaced individually to extend mold life and reduce waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a round cavity mold is used to uniformly distribute pressing force, then the mold can avoid damage due to stress concentration, but the sintered ceramic blocks are tightly pressed onto the inner wall causing damage during stripping and gradual enlargement of the inner diameter
Solution Approach 1:
The mold is divided into multiple independent components: a reusable outer sleeve and replaceable inner molds. The inner molds that contact the ceramic powder during sintering can be individually replaced when worn, while the outer sleeve maintains its structural integrity and can be reused multiple times. This segmentation allows the pressing surfaces to be replaced without replacing the entire mold structure.
Solution Approach 2:
The inner molds are designed as consumable components that can be discarded after a certain number of uses when they become worn or damaged. The outer sleeve is recovered and reused by replacing only the inner molds, thereby recovering the valuable structural component while discarding the worn pressing surfaces.
2Ease of manufacture
If a round GOS piece is manufactured and then cut into rectangular strip structures, then the scintillators can be facilitated for cutting, but the surrounding arcuate parts are left unavailable causing waste of material
Solution Approach 1:
The mold cavity is pre-configured with the exact rectangular shape needed for the final scintillator product. The pressing heads and mold cavity work together to directly form rectangular GOS ceramic blocks during the sintering process, eliminating the need for subsequent cutting operations and preventing material waste from arcuate portions.
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 modular mold design significantly extends the retirement period of the mold, reduces material waste, and lowers production costs by enabling the production of GOS ceramic scintillators with specific shapes without the need for extensive equipment pressure and powder usage, improving process economy.
Implementation Method 1
a GOS ceramic powder is pressed by a hot-pressing driving in an axial relative movement to form scintillators
Implementation Method 2
a prepared GOS powder is placed into a straight-tube-shaped mold having upper and lower pressing heads to perform hot-pressing-sintering
Data Source
AI summary
A mold and a method of manufacturing GOS ceramic scintillator by using the mold are provided. The mold comprises: a female outer sleeve having a cavity disposed inside; a plurality of female blocks disposed inside the cavity, the plurality of female blocks being put together to form a composite structure having a vertical through hole; and a male upper pressing head and a male lower pressing head, wherein each of the male upper pressing head and the male lower pressing head has a shape consistent with that of the vertical through hole. The disclosure may reduce defects of the related art in hot-pressing-sintering such as a mold has a short retirement period and a high material waste, significantly reduce the cost for production of the GOS ceramic scintillator, and significantly improve a process economy.