Casting Device Mold Ring Undercut Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing casting technologies face challenges in producing metallic components with high manufacturing accuracy and minimal wear, particularly in achieving the required strength properties and compensating for thermal expansion, while avoiding mold system overdetermination and wear issues.
Innovation Solution
A casting device with a base body, first and second mold parts, and radially supported mold side parts that form a mold ring, allowing for axial movement and pressure application after casting to compensate for volume changes and enhance strength, featuring a non-stop design between mold parts to prevent static overdetermination and accommodate thermal expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional die-casting mold system is used with defined stops between mold parts, then the mold structure is stable and easy to manufacture, but the system becomes statically overdetermined and cannot accommodate thermal expansion, leading to wear and distortion
Solution Approach 1:
The invention removes the defined stop between the first and second mold parts, extracting the constraint that causes static overdetermination. This allows the mold parts to move independently and accommodate thermal expansion during the casting process, preventing distortion and maintaining manufacturing accuracy while preserving overall system stability through the base body's guiding function.
2Strength
If high casting pressure is applied to produce high-strength components, then the strength properties improve, but wear on ejector pins and mold surfaces increases significantly
Solution Approach 1:
The invention replaces the traditional mechanical ejector pin system with a mold part design where the second mold part itself serves as the ejection mechanism. By moving the second mold part in the ejection direction, components are ejected without requiring separate ejector pins, thereby eliminating wear on ejector pins while maintaining high casting pressures for producing strong components.
3Manufacturing precision
If the mold cavity is tightly sealed during casting, then manufacturing accuracy improves, but thermal expansion has no accommodation space, causing distortion and wear
Solution Approach 1:
The invention introduces dynamic movement capability between the first and second mold parts, allowing them to move independently in the ejection direction. This dynamic design enables the mold to accommodate thermal expansion during casting while maintaining tight sealing for manufacturing accuracy, and prevents distortion by allowing controlled movement rather than rigid constraint.
4Adaptability or versatility
If a complex multi-part mold system is used to produce components with undercuts, then the versatility improves, but the device complexity and wear increase
Solution Approach 1:
The invention makes the second mold part serve multiple functions: it forms the mold cavity wall during casting, acts as a sealing element, and functions as the ejection mechanism. This multi-functionality eliminates the need for separate ejector pins and reduces overall system complexity while maintaining the ability to produce components with undercuts through the radial mold side parts.
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
Enables the production of components with high strength and manufacturing accuracy, including those with undercuts, by applying pressure after casting, which inhibits crystal growth and creates a fine structure, while minimizing wear and maintaining precise positioning.
Implementation Method 1
the mold side parts being supported radially in the inserted state against the peripheral side wall of the base body
Implementation Method 2
with which thermal expansion can be compensated for
Data Source
Figure 1~2
Figure 3~5
Figure 6~7
AI summary
Device for casting a metallic component with an undercut, comprising: a base body (3) with a first end section (12) and a circumferential side wall (13) with a tapered inner surface (16); a first mold part (4) that can be inserted into the base body (3) and that forms a first forming surface (23) for the component (8) to be cast; several mold side parts (5) that can be inserted into the base body (3) and, in the inserted state, are radially supported against the circumferential side wall (13) of the base body (3) and form a mold ring (17) with an inner forming surface (18) for the component (8) to be cast;a second mold part (6) which is movable in the mold ring (17) formed by the mold side parts (5) up to a casting position for casting and which forms a second forming surface for the component (8) to be cast, wherein the second mold part (6) is arranged in the casting position completely without contact with the first mold part (4).