EVA Magician

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EVA Magician
for Injection Molding of EVA Shoe Soles
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Introduction

• EVA Magician is a powerful customized
• system specially for EVA injection mold.
• It automatically calculates the ratios
• based on the thickness of each section,
• scales and smoothes 3D models.

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Product Features

• Quickly scales original models
• Based on material characteristics, fits scaled
  curves using scaling ratios
• Has various cross-section cutting and calculating
  methods suitable for material and model
  characteristics
• Provides editing functions able to meet design
  requirement

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Traditional Procedure
Standard 2D engineering drawing
Create scaled 3D CAD model
Correct
Redraw scaled 2D engineering drawing
Calculate expansion ratio
Standard 3D CAD model
Check result
Measure product
Incorrect
Revise

• Disadvantages
• Time-consuming
• Complex
• Complicated revisions required
• Inter-departmental communication needed which may
  be difficult

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Innovative Procedure
Correct
Standard 2D engineering drawing
Standard 3D CAD model
Measure product
EVA Magician
Check result
Incorrect
Revise

• Advantages
• Complete procedure, combines automatic ratio
  calculation and fixing shapes to accomplish
  scaling requirements
• Scaling finished within one day
• Special editing functions simplifies revisions

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Efficiency

• Shortens the time in scaling
• 1 WEEK 1 DAY
• Simplify the scaling procedures
• Complete in EVA Magician
• Easy editing process
• Specialized editing function for
• scaling model

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Quickly Scaling
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Functions

• Table of scaling ratios management for various
  EVA materials
• Quick scaling of 3D models
• Quick scaling of 2D drawings
• Editing Functions

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Ratio Table Management

• Manages ratio tables for various EVA materials
• Scaling ratios can be revised

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Scaling Ratio Calculation

• Automatically calculates scaling ratio and fits
  scaled curves
• Reduces calculation errors done manually

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Quick Scaling 3D Model

• 3 Simple steps required for scaling 3D models
• -- Sections Setup
• -- Thickness Calculation
• -- Scaling

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Cross-sections Automatic

• Two ways of automatically creating cross-sections

Start from the center
Start from the heel
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Cross-sections Manual

• Set up cross-sections manually-- location ,add,
  delete.
• No limit to the number of cross-sections

Delete
ADD
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Thickness Calculation

• Horizontal or vertical calculation methods

• Cross-sections automatically smoothed while
  proceed scaling

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Cross-section Scaling

• Various methods for cutting cross-sections
• -- Select appropriate sectioning mode
• -- Improve scaling precision

Thickness of 2 sections
Average thickness of 2 section
Four sections
One section
Two sections
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3D Surface (IGES) Scaling
Before Scaling
After Scaling
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3D Mesh Model(STL) Scaling
Before Grading
After Grading
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Scaling 2D Drawing

• 2D drawing matches result of 3D scaling
• 2D drawing updated after 3D scaled model is edited

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Cross-section Editing

• Basic editing functions
• Maintain shapes
• Adjust for concavities
• Editing Strengthen
• Adjust cross-section sizes
• Length revision
• 3D mould retrieving

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Maintain Shapes

• For expansion at local areas, set local scaling
  ratios.
• Fix and keep thickness locally
• Fix and keep height locally

Blue Original cross-section Pink Scaled
cross-section Red After adjustment
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Concavity Compensation

• Set angle and distance to adjust for concavities
  and to compensate for expansion.

Blue Original cross-section Pink Scaled
cross-section Red After adjustment
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Editing Strengthen

• Angle of the sidewall can be adjusted
• -- Avoid the sidewall bending toward to
  inward or outward after scaling

Blue Original cross-section Pink Scaled
cross-section Red After adjustment
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Size Adjustments

• Adjust sizes of major cross-sections, such as
• Top gauge
• Width of sole
• Height at waist
• etc.

Blue Original cross-section Pink Scaled
cross-section Red After adjustment
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Length Revision (I)

• Set the scaling ratio for an area to revise
  length

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Length Revision (II)

• Directly revise Y value of cross-section
• Length adjust on a scaled model

By moving the y value of a cross-section on the
scaled model to get a requested length of a model
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3D Model Retrieving

• From scaled model to retrieve the original model
  with the same scaling ratio
• Shortens revision time

Original 11 Model
Recalculate 11 Model