Insert Molding Die Structure With Tapered Positioning Pin
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Solution Overview
Problem
In insert molding, achieving high dimensional accuracy and simplifying the insertion and mold release processes is challenging due to deformation issues like warping in inserted articles, which require significant effort and time, and often result in human-factor-induced defects during manual mold release.
Innovation Solution
A die structure with a positioning mechanism featuring a tapered positioning pin, a stop mechanism with spring means, and a pressing mechanism using spring-urged pusher pins to facilitate easy insertion and automatic mold release, ensuring accurate positioning and stable holding of the inserted article, even when deformed, and preventing defects during the mold release process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a positioning pin is used to strictly position the inserted article, then positioning precision is improved, but the insertion process becomes more complex and time-consuming due to deformation correction requirements
Solution Approach 1:
The positioning pin distal end is changed from a conventional cylindrical shape to a tapered shape, allowing it to penetrate deformed portions of the inserted article and achieve positioning without requiring pre-correction of warping or deformation
Solution Approach 2:
The tapered positioning pin performs preliminary penetration and positioning action before the molding process, automatically accommodating deformation without requiring manual intervention or complex positioning procedures
2Ease of manufacture
If manual detaching operation is used to remove adhering inserted article, then mold release is achieved, but productivity decreases and product damage risk increases
Solution Approach 1:
The pusher pin automatically performs the mold release function by itself through spring urging, eliminating the need for manual detaching operations. The system serves itself by automatically pushing the molded article off the insert after molding
Solution Approach 2:
The pusher pin acts as an intermediary mechanism between the molding system and the inserted article, facilitating automatic release without direct human intervention. The spring-loaded pusher pin mediates the separation process
3Manufacturing precision
If preheating is applied to correct deformation, then positioning accuracy is improved, but the overall process time increases
Solution Approach 1:
The positioning pin geometry is changed to a tapered shape that can accommodate deformed states without requiring thermal preheating or other corrective treatments, thereby maintaining positioning accuracy while eliminating the time-consuming preheating step
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
The proposed die structure simplifies the insertion and mold release processes, reduces the risk of human-induced defects, and enables efficient handling of deformed articles by allowing for preheating and automatic mold release, significantly reducing the time and effort required for these operations.
Implementation Method 1
a stop mechanism that has a spring means assembled with the one split die and a stopper portion held by the spring means, and temporarily stops movement of the other split die when the other split die comes into contact with the stopper portion
Implementation Method 2
a pressing mechanism that has a spring assembled with the other split die, a pusher pin urged by the spring, and elastically presses the inserted article by the pusher pin urged by the spring
Data Source
AI summary
Provided is a structure in which an inserted article is easily inserted and a product is easily released from a die after molding. The structure includes a positioning mechanism which is vertically arranged on one split die, includes a positioning pin having a tapered distal end, and positions the inserted article by engaging the inserted article with the positioning pin, a stop mechanism that has a spring means assembled with the one split die and a stopper portion held by the spring means, and temporarily stops movement of the other split die when the other split die comes into contact with the stopper portion at the time of mold clamping, and a pressing mechanism that has a spring assembled with the other split die, a pusher pin, a spring assembled with the one split die, and a pusher pin, and elastically presses the inserted article by the pusher pin.