Light Guide Plate Mold Design for Warpage Compensation
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Solution Overview
Problem
The manufacturing of light guide plates through injection molding often results in warpage and deformation due to non-uniform shrinking and temperature inconsistencies, leading to flatness issues that affect product quality and pass rates.
Innovation Solution
A method involving digital simulation software to analyze a three-dimensional model of the light guide plate, applying a deformation coefficient and size parameter to correct for simulation deformation, and adjusting mold dimensions to prevent warpage, using tools like Moldflow or Moldex3D to simulate and compensate for deformation during the molding process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If injection molding is used to manufacture light guide plates, then manufacturing efficiency is improved, but warpage and deformation occur due to non-uniform shrinking and temperature inconsistencies
Solution Approach 1:
The patent applies digital simulation software (Moldflow or Moldex3D) to predict and calculate deformation amounts before actual molding. By performing preliminary simulation analysis on the three-dimensional model, the system determines counter-deformation amounts that are then applied to the mold design, preventing warpage before it occurs during injection molding.
Solution Approach 2:
The patent introduces a counter-deformation mechanism where the mold is designed with pre-calculated compensation values. The simulation software calculates the expected deformation, and the mold is adjusted in the opposite direction to counteract the anticipated warpage, ensuring the final light guide plate achieves the desired flatness.
2Manufacturing precision
If a mold is designed based on counter-deformation method, then warpage and deformation are reduced, but the complexity of mold design increases
Solution Approach 1:
The patent replaces complex manual trial-and-error mold design with automated digital simulation and calculation. The simulation software automatically performs deformation analysis and calculates counter-deformation amounts, substituting mechanical trial-and-error processes with computational analysis, thereby reducing design complexity while improving precision.
Solution Approach 2:
The patent creates a virtual copy of the light guide plate in digital simulation software to analyze deformation behavior. By working with the digital three-dimensional model and its simulated deformation characteristics, designers can determine counter-deformation amounts without repeatedly manufacturing and testing physical molds, simplifying the overall design process.
3Measurement precision
If multiple times of test and experiment are conducted to obtain deformation coefficients, then accuracy of deformation prediction is improved, but manufacturing time increases
Solution Approach 1:
The patent performs deformation coefficient determination and validation through test and experiment in advance, before mass production begins. By completing these calibration activities preliminarily and storing the obtained coefficients, the system avoids repeated testing during production, thereby maintaining high prediction accuracy while minimizing time loss during actual manufacturing.
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 method ensures high flatness of the light guide plates produced, improving manufacturing yield and efficiency by effectively addressing warpage and deformation issues.
Implementation Method 1
simulate a formation process of a three-dimensional model of the light guide plate... conducting simulation of an injection-molding process of the light guide plate so as to obtain the simulation deformation amount
Implementation Method 2
due to various factors, such as non-uniform shrinking among various portions of the light guide plate, non-uniform temperature, and inconsistent molecule motion
Data Source
AI summary
A method for manufacturing a light guide plate mold includes: acquiring a deformation coefficient i, where 1<i≤1.12, and a size parameter j, where 0.03 mm<j≤0.05 mm; applying digital simulation software to simulate a formation process of an original three-dimensional model for a light guide plate so as to acquire a simulation deformation amount of the light guide plate; multiplying the simulation deformation amount with the deformation coefficient i to obtain a counter deformation amount of a light guide plate mold; and subtracting the size parameter j from a length and a width of the light guide plate to obtain length and width dimensions of the light guide plate mold; and forming the light guide plate mold according to the counter deformation amount of the light guide plate mold and length and width dimensions of the light guide plate mold. A light guide plate manufactured with such a mold shows relatively high flatness.