Split Body Mold for Rotating Member Extraction
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Solution Overview
Problem
Conventional injection molding processes face challenges in extracting products with undercut shapes without rotating the mold, leading to increased complexity, vibration, noise, and excessive parting lines, which affect aesthetics and user convenience.
Innovation Solution
A molding apparatus with a main mold featuring split bodies along the circumferential direction, allowing for the extraction of a rotating member by separating the split bodies radially, reducing the number of parting lines, and enabling the molding of blades in a single turn.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a separate rotating shaft and motor are provided to extract injection products with undercut shapes, then the extraction capability is improved, but the device complexity increases excessively
Solution Approach 1:
The mold is divided into multiple split bodies that can be independently separated. Instead of using a complex rotating shaft system, the mold itself is segmented into first, second, third, and fourth split bodies that can be pulled apart to extract products with undercut shapes, thereby eliminating the need for separate rotational extraction mechanisms.
Solution Approach 2:
Rather than rotating the mold or product to achieve extraction, the invention inverts the approach by separating the mold into multiple stationary split bodies that can be displaced relative to each other. This allows extraction without rotation, converting a rotational problem into a linear separation problem.
2Ease of operation
If a rotational extraction system is used, then products with undercut shapes can be extracted, but vibration and noise are generated excessively
Solution Approach 1:
The invention replaces the mechanical rotational extraction system with a linear separation mechanism. Instead of rotating the mold to extract products, the split bodies are simply pulled apart in a linear motion, eliminating the vibrations and noises associated with rotational mechanisms while maintaining extraction capability.
3Adaptability or versatility
If the proportion of undercut shape is increased to enable rotational extraction, then extraction flexibility is improved, but excessive parting lines occur on the product surface
Solution Approach 1:
The mold is segmented into multiple split bodies that can be separated to extract products. This segmentation allows the mold to adapt to various product geometries including undercut shapes without requiring excessive undercut proportions, thereby maintaining surface quality while providing extraction flexibility.
Solution Approach 2:
Instead of relying on rotational movement in one dimension, the invention introduces separation in another dimension by dividing the mold into multiple split bodies that can be displaced relative to each other. This dimensional change allows extraction of complex shapes without creating excessive parting lines on the product surface.
4Adaptability or versatility
If multiple cores are added to mold injection products with undercut shapes, then molding capability is improved, but the number of cores increases excessively
Solution Approach 1:
The mold is divided into multiple split bodies that can be independently separated. This segmentation provides the necessary molding capability for undercut shapes by allowing the mold to open in a way that releases the product, eliminating the need for multiple complex cores while maintaining versatile molding capability.
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 approach simplifies the molding process, reduces parting lines, enhances productivity, and facilitates maintenance by allowing the extraction of rotating members with blades without the need for rotational power, improving the aesthetic and functional quality of the products.
Implementation Method 1
injecting injection liquid dissolved by heating into a mold
Implementation Method 2
injecting the injection liquid into the space, a third step of continuously injecting the injection liquid by maintaining a predetermined pressure of a nozzle
Implementation Method 3
solidifying or hardening the injection liquid in the mole
Data Source
AI summary
An apparatus for molding a rotating member includes a main mold including a column part space configured to mold a column part therein, a plurality of blade spaces configured to mold a plurality of blades therein, and a plurality of split bodies disposed along a circumferential direction of the column part and configured to move along a radial direction of the column part. Each of the plurality of split bodies comprises a column part molding surface defining the column part space, and a plurality of blade molding surfaces defining the blade space. Column part molding surfaces of the plurality of the split bodies define the column part space together, and a first blade molding surface provided at one of the plurality of split bodies defines, together with a second blade molding surface provided at another one of the plurality of split bodies, one of the plurality of blade spaces.