The coil straightener is probably the heart of each spinning wire processing line: it compensates for any undesirable deformation of the sheet metal tubing during electrical coiling. The right coil straightener for each application is defined by the specific requirements that must be met. The size, the number and the shape of the electrodes are only some of the important considerations to take into account. The total area of the coil, its thickness and the ambient temperature will influence its usage. The best coil straightener therefore depends on the type of electroplating job to be done and on the particular substrate.
The electroplating industry requires coil straighteners with very high precision performance. Most equipment manufacturers offer both standard and precision designs with built in anti-depressors for lubricating the plate. Standard designs are intended for single and double layer applications. The equipment must be designed for use with the specific substrate to be used: either flat or rolled, sheet metal, aluminum, copper, brass or nickel, etc.
The standard design features a large, precision-made cover with ball bearings to make smooth turning and the finest quality wire. The machine includes a metal tool for heavy duty turning and a precision ground steel core for accuracy. The core can be made from metal or carbon. A metal tool is available with a diamond-tipped grinding wheel and a.021 fine copper roll for making very fine rolls.
The precision coil straightener includes a precision-ground die. The machine has an adjustable heating system for pre-heating the die and for regulating the temperature at the time of using the machine. For making precision ceramic rolls, the machine includes a metal tool with a diamond-tipped grinding wheel. The ceramic material may also be preheated by means of an electrical current in addition to a metal tool for preparing light-weight copper. The material may also be preheated by means of an induction heating element.
The precision dual action coil straightener has a center distance that is adjusted by means of a rotary control device. The center distance straightening rolls are available in both metric and standard units. The machine has a fixed center distance and a variable center drive unit for providing a load distribution.
There are other types of heavy duty power straighteners other than the coil straightener. It is advisable to check the product literature for the differences between the products. Some of these include the following: a wire feed adapter, wire feed extension, wire feed cover, heat-rolling cap, heat-tension setting and a slew. The wire feed adapters allow a different amount of wire to be run through each coil without the need to change the position of the rollers. The wire feed extensions alter the length of the coil run.