English to Portuguese Tech/Engineering Metallurgy / Casting taper

Correct taper is required to keep each successive wire wrap climbing smoothly, so as to avoid overlapping, and wire shooting up scenarios. The industry Standard for taper is the measurement of the angle with a centerline or straight edge, not the included angle. For example, a !/2° taper is equivalent to .0175 in. on the diameter; while a 1° taper is .035 in. The taper tolerance should be +/- .002". The basic guideline for taper is, if the wire is not climbing, increase
the taper. If the wire shoots up, reduce taper. Also, small diameter wire requires more taper than larger diameter wire. Like most rules there are exceptions, and taper rules are no different. There are two exceptions to the aforementioned taper rules: (1) the need to create a step, and (2) the need to create double or multiple tapers.

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Wrapping the gripper with carpet or rubber to minimize impact to the coating and block face;
Blocks require enough wraps to allow for proper cooling of the wire;
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The most crucial dimension is the taper(s) on the face of the
block. While the radius simply creates a ramp effect to get the first wire wrap started, the
correct taper is needed to keep each successive wrap of wire climbing smoothly up the
block. A taper that is too big will make the wire wraps jump up the block without being
pushed by the lower wraps. The top wrap then comes off of the block too high, throwing
o ff its alignment with the next die. This can cause prema ture die wear and marking of the
wire. When the taper is too small, there is not enough force to push the wraps up the
block, causing overlaps and wire breaks.