Thin-Walled Tubular Part Demolding Without Circumferential Deformation
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Solution Overview
Problem
Existing demolding methods for thin-walled parts, especially those with extremely small wall thickness relative to diameter, cause local deformation due to the use of conventional demolding techniques.
Innovation Solution
A demolding device with contour units and pullers that apply a load in the circumferential direction, using contact structures to maintain contact with the thin-walled part while expanding it outward, preventing deformation by controlling the movement of these units in conjunction with the puller's action.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional demolding methods are used for thin-walled parts with extremely small wall thickness, then the demolding process can be completed, but local deformation occurs in the circumferential portion of the thin-walled part
Solution Approach 1:
The demolding device divides the circumferential support function into multiple independent contour units arranged around the thin-walled part. Each contour unit independently contacts and supports a specific portion of the part's outer surface, allowing distributed load application that prevents localized deformation while enabling complete demolding.
Solution Approach 2:
Each contour unit is designed with specific contact structures (such as rollers or plates) that adapt to the local geometry of the thin-walled part. The contour units provide differentiated support based on local requirements, with contact structures that can move independently to follow the part's contour, ensuring uniform stress distribution and preventing deformation.
2Adaptability or versatility
If the wall thickness of the thin-walled part is extremely small relative to the diameter, then the part can be formed as required, but conventional demolding causes local deformation
Solution Approach 1:
The contour units are designed to be movable rather than fixed, allowing them to dynamically adjust their position and contact points on the thin-walled part's outer surface. This dynamic capability enables the device to accommodate variations in part geometry while maintaining uniform support distribution, preventing deformation during the demolding process.
Solution Approach 2:
The contact structures of the contour units serve as intermediaries between the demolding force and the thin-walled part. These intermediaries (rollers or plates) distribute the applied loads uniformly across the part's surface, acting as stress-transmitting elements that prevent direct concentration forces from causing deformation while still enabling effective demolding.
Data Source
AI summary
A demolding device that removes a thin-walled part from a mold, the thin-walled part being tubular and having a partially open wall, the demolding device including: contour units that are located in a circumferential direction of the thin-walled part and each of which includes a contact structure that contacts an outer surface of the thin-walled part and moves in a thin-walled surface outward direction extending away from the outer surface of the thin-walled part; and a puller that engages with edges of the partially open wall of the thin-walled part and that applies a load to the thin-walled part, the load including a force component acting in the circumferential direction of the thin-walled part. In response to application of the load from the puller to the thin-walled part, each of the contour units moves the contact structure to keep the contact structure in contact with the thin-walled part.