Segmented Drum-Shaft Tube Mold for Easy Demolding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing power transmission systems face challenges in producing and using fiber composite drum-shaped shaft tubes due to the difficulty in demolding the forming mold, limiting their production and application.
Innovation Solution
A forming mold for a drum-shaped shaft tube is designed with a simple structure and convenient demolding, comprising a rotating body divided into multiple parts that can be easily separated and combined circumferentially, allowing for the formation of a variable-diameter shaft tube with a contour matching the inner peripheral surface of the drum-shaped shaft tube, facilitating easy demolding by deflecting side edges and using extended sections for secure fitting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a forming mold is used to produce drum-shaped shaft tube, then the shaft tube can achieve variable diameter and improved performance, but the demolding process becomes difficult
Solution Approach 1:
The forming mold body is divided into multiple parts (first part, second part, third part, fourth part) that can be separated from each other. Each part has a longitudinal maximum material size less than the minimum diameter of the through hole, enabling them to be detached individually and fall through the through hole after forming, thus solving the demolding difficulty while maintaining the drum-shaped variable diameter structure.
Solution Approach 2:
A through hole is introduced in the axial direction through the center of the mold body, providing a new dimensional pathway for demolding. The mold parts are designed to detach and fall through this axial dimension, transforming the demolding problem from a radial extraction issue to an axial passage issue, thereby facilitating easy removal of the formed shaft tube.
2Shape
If the forming mold has a complex structure to achieve drum-shaped contour, then the shaft tube quality improves, but the mold structure becomes complicated
Solution Approach 1:
The mold body is segmented into four parts with specific cross-sectional characteristics. At least one part has deflected side edges creating a trapezoidal cross-section where the outer arc chord length is less than the inner arc chord length. This segmentation allows each part to be simple in structure while collectively forming the complex drum-shaped contour, reducing individual part complexity.
Solution Approach 2:
Different parts of the mold body have different cross-sectional geometries tailored to specific regions. The deflected side edges and varying arc chord lengths in different parts allow local adaptation to create the drum-shaped profile, where each local section has optimized simplicity while contributing to the overall complex shape.
Data Source
AI summary
A forming mold for a drum-shaped shaft tube and a demolding method therefor are provided. The forming mold includes a rotating body having a through hole that passes through the center of the body in an axial direction. The body is divided into multiple parts in a longitudinal direction. The parts are combined in a circumferential direction to form the rotating body. A longitudinal maximum material size of each part is less than a minimum diameter of the through hole. Two side edges of a cross section of at least one part are deflected toward adjacent parts with respect to radial lines at which two end points of an outer arc of the cross section are located, and a chord length of the outer arc of the cross section is less than a chord length of an inner arc of the cross section. The body has a forming section.