ART
BEAUTY & WELLNESS
CRAFT
CULTURE & HISTORY
ENTERTAINMENT
ENVIRONMENT
FOOD & DRINKS
REVERSE ENGINEERING
SCIENCES
SPORTS
TECHNOLOGY
WEARABLES
Safety Spectacles: Moulded Polycarbonate with a Hard Coat
Industrial safety spectacles are injection-moulded from tough, transparent polycarbonate, often as a single front piece with the lenses, hinged to moulded temple arms; one design meeting the ANSI Z87.1 impact standard uses a lens 0.080 inch thick. Polycarbonate scratches easily, so the lenses get a thin, clear, abrasion-resistant coat of about 3–5 micrometres. Hard coats are applied by dipping or spinning after moulding: acrylate coats are cured by UV, siloxane coats by heat. Frames may be moulded in nylon.
Advanced
Factory process
Instructions
1
1
Mould the front
Mould the front
Injection-mould the lens or one-piece front in polycarbonate.
Materials for this step:
Polycarbonate Pellets0.05 kgTools needed:
Injection Moulding Machine2
2
Hard-coat
Hard-coat
Wash and dry the lens, dip it in the hard-coat solution and lift it out at an even speed.
Materials for this step:
Lens Hard-Coat Solution1 literTools needed:
Dip Coating Tank3
3
Cure
Cure
Dry the coat and cure it: UV for acrylate coats, heat for siloxane coats.
Tools needed:
Curing Oven4
4
Mould the temples and assemble
Mould the temples and assemble
Mould the temple arms and hinge them to the front.
Materials for this step:
Nylon Pellets0.02 kgTools needed:
Injection Moulding MachineMaterials
3- 0.05 kgPlaceholder
- 1 literPlaceholder
- 0.02 kgPlaceholder
Tools Required
3- Placeholder
- Placeholder
- Placeholder
This blueprint makes
Related Blueprints
These blueprints share knowledge with this one — techniques, materials, or principles that connect them in the learning graph.
CC0 Public Domain
This blueprint is released under CC0. You are free to copy, modify, distribute, and use this work for any purpose, without asking permission.
Support the Maker by purchasing products through their Blueprint where they earn a Maker Commission set by Vendors, or create a new iteration of this Blueprint and include it as a connection in your own Blueprint to share revenue.