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Tape Measure: Curved Steel Blade, Spring and Case
The blade of a tape measure is a thin metal ribbon with a curved, concavo-convex cross-section when it is out of the case, which keeps it stiff, but it lies flat as it winds into a coil inside. The ribbon is painted, printed with its graduations and then given a polymer coat against wear, applied by a roller and cured in an oven. An internal coil spring winds the blade back onto its reel. The end hook is riveted through oval holes so it can slide by its own thickness, giving the same reading whether you hook it on or push it against something. Cases have been moulded in ABS since 1963.
高级
Continuous (industrial)
说明
1
1
Paint and print
Paint and print
Paint the steel ribbon and print the length graduations on it.
此步骤所需材料：
卷尺钢带1 公斤所需工具：
尺带印刷涂装线2
2
Coat and cure
Coat and cure
Pass the ribbon over a coating roller and through an oven to cure a polymer coat against wear.
所需工具：
尺带印刷涂装线3
3
Fit the hook
Fit the hook
Rivet the end hook through oval holes so it slides by its own thickness.
此步骤所需材料：
卷尺端头钩1 个
钢铆钉2 个4
4
Mould the case
Mould the case
Mould the case in ABS.
此步骤所需材料：
ABS颗粒0.1 公斤所需工具：
注塑机5
5
Assemble
Assemble
Wind the blade onto its reel with the coil spring that retracts it, set it in the case and close the case.
此步骤所需材料：
卷尺回卷弹簧1 个此蓝图制作
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