mold texturing
DESCRIPTION
Mold Texturing. Trevor Thorwart Andrew Meier Josh Hoover. Introduction. Mold Texturing Flexibility Pleasing Look Aesthetic feel. Types of Mold Texturing. Mechanical Computer Numerical Control (CNC) Abrasive Blasting Electrical Electrical Discharge Machining (EDM) Chemical Engraving. - PowerPoint PPT PresentationTRANSCRIPT
Mold TexturingTrevor ThorwartAndrew MeierJosh Hoover
Introduction• Mold Texturing
– Flexibility– Pleasing Look– Aesthetic feel
Types of Mold Texturing
• Mechanical– Computer Numerical Control (CNC)– Abrasive Blasting
• Electrical– Electrical Discharge Machining (EDM)
• Chemical Engraving
CNC Engraved
• Areas of use– Logos and Patterns
CNC Engraved• Basic Milling Operation• Work-piece clamped
down• Tool path computer
generated • Drill follows and cuts
path
Abrasive Blasting Method
• Abrasive particles etch tool– Commonly sand– High Velocity
• Matte, decorative, and textured finish
Abrasive Blasting
• Advantages– Cheap– Quick
• Disadvantages– Good for matte surface textures– Inconsistent surface finish
Abrasive Blasting
Electrical Discharge Machining (EDM)
• Created using electrodes– Shaped tool or wire graphite
• Plasma Etched in CNC pattern
EDM Procedure
• Placed in dielectric fluid• Discharge created• Plasma erodes surface
– Follows CNC path• Dielectric fluid washes
debris away
EDM
• Advantages– Complex and simple surfaces– Dimensional Accuracy (+/- .0005 in)– High Range of Materials
• Soft and Hard Mold Steels– Can be fully automated
EDM
• Disadvantages– Low production volume
• Slow cutting– EDM scale
• Must be post-polished– Blind holes
• Difficult Debris Removal
EDM
Chemical Engraving
• Patterning Process using a acid bath
Chemical Engraving Procedure
• Stencil• Mold Masked• Acid Bath• Tooling Dissolves
Chemically Textured Surface
Details Masked
Chemical Engraving• Advantages
– Dimensional– Cost– Tooling
• Disadvantages– Surface Types– Secondary cleaning
operation– Masking
Mold Texturing Areas of Use
• Injection Molding• Blow Molding• Compression Molding• Thermoforming• Rotational Molding
Other Issues
• Guidelines– Mold Preparation
• Costs– Surface– Tooling– Mold material
• Mold Repair
Conclusion