Amorphous Metal Hollow Article Casting Mold Segmentation
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Solution Overview
Problem
Existing methods for producing hollow articles from amorphous metals face challenges such as damage during demolding due to shrinkage, limited geometric constraints due to oblique inner cores, and the need for pre-tempering tools, which restrict the production of articles with constant diameters and longer lengths.
Innovation Solution
A method involving a casting mold with an inner core surrounded by a separation element that is not attached, allowing for easier demolding and reducing contact between the amorphous metal and the core, enabling the production of hollow articles with constant inner diameters and longer lengths without the need for demolding drafts or high preheating of the tool.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If oblique inner cores or splits with mold drafts are used to facilitate demolding, then demolding becomes easier, but the inner diameter of the cavity becomes non-constant and the geometric shape and dimensions of the hollow article are limited
Solution Approach 1:
The inner core is divided into multiple separable segments that can be independently removed from the hollow article. This segmentation allows each segment to be extracted separately without requiring oblique angles or drafts, thereby maintaining constant inner diameter while facilitating demolding through sequential segment removal.
Solution Approach 2:
The inner core is completely extracted from the hollow article after casting by breaking it into small fragments that can be removed individually. This extraction approach eliminates the need for the inner core to remain as a single integrated component during demolding, solving the contradiction between easy demolding and precise dimensional control.
2Ease of operation
If oblique inner cores are used to enable demolding, then demolding is facilitated, but the length or depth of the cavity is greatly limited
Solution Approach 1:
The inner core is segmented into multiple sections that can be independently extracted along the length of the cavity. This segmentation enables the removal of the inner core from deep or long cavities without requiring oblique angles, thereby allowing production of hollow articles with greater length or depth while maintaining easy demolding.
3Object-affected harmful factors
If a mold draft is used to prevent surface damage during demolding, then surface damage is reduced, but the inner diameter of the cavity becomes non-constant and reworking is required
Solution Approach 1:
The inner core is divided into segments that can be removed without requiring draft angles. This segmentation allows the cavity to maintain constant inner diameter while still enabling damage-free demolding through sequential extraction of individual segments, eliminating the need for reworking.
4Object-affected harmful factors
If the inner core is removed mechanically to avoid damage to the hollow article, then surface damage is avoided, but the demolding process becomes more complex and time-consuming
Solution Approach 1:
The inner core is pre-segmented into multiple sections that can be independently extracted using simple mechanical means. This segmentation transforms the complex task of removing a single large core into simpler, sequential removal of smaller segments, reducing overall process complexity while avoiding surface damage.
Solution Approach 2:
The inner core is designed with pre-defined separation planes or weak points that allow it to be easily broken into segments during or after demolding. This preliminary preparation of the core structure simplifies the subsequent removal process and reduces the complexity of the overall demolding operation.
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 method simplifies the demolding process, reduces surface damage, and allows for the production of hollow articles with improved surface quality and increased design freedom, including longer tubes with constant inner diameters, while reducing material waste and tooling complexity.
Implementation Method 1
can be obtained during the casting process by rapid cooling of a metallic melt
Implementation Method 2
the metal solidifies without any regular crystalline lattice structures
Implementation Method 3
the cast metal can shrink onto the tool components, i.e., the volume of the metal can change by cooling
Implementation Method 4
at least a part of the lateral surface of the inner core is enclosed by a separation element, wherein the separation element is not attached to the inner core
Data Source
AI summary
A method for producing a hollow article made of amorphous metal comprising the steps of: a) providing a metal composition, b) melting the composition according to step a) in order to obtain a melt, c) introducing the melt according to step b) into a cavity of a casting mold, the casting mold comprising an inner core, at least a portion of the lateral surface of the inner core being surrounded by a separation element, d) cooling the melt in the casting mold in order to obtain a molded part made of amorphous metal, e) removing the inner core and the separation element from the molded part according to step d) in order to obtain a hollow article made of amorphous metal. The present invention also relates to a hollow article made of amorphous metal, more particularly to a pipe made of amorphous metal.