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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.
高级
Factory process
说明
1
1
Mould the front
Mould the front
Injection-mould the lens or one-piece front in polycarbonate.
此步骤所需材料：
聚碳酸酯颗粒0.05 公斤所需工具：
注塑机2
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.
此步骤所需材料：
镜片硬涂液1 升所需工具：
浸涂槽3
3
Cure
Cure
Dry the coat and cure it: UV for acrylate coats, heat for siloxane coats.
所需工具：
固化烘箱4
4
Mould the temples and assemble
Mould the temples and assemble
Mould the temple arms and hinge them to the front.
此步骤所需材料：
尼龙颗粒0.02 公斤所需工具：
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