Roll casting意思
"Roll casting" is a term used in various contexts, but it is most commonly associated with metalworking and fishing. Here are the two primary meanings:
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Metalworking: In metalworking, roll casting refers to a process where molten metal is poured between two rotating rolls. The rolls are usually water-cooled and have a specific pattern engraved on their surface. As the metal is poured between the rolls, it is flattened and shaped into a thin sheet or strip. This process is commonly used in the production of aluminum and copper foils, as well as in the manufacture of other metal products.
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Fishing: In fishing, roll casting is a technique used to cast a fishing line. It is particularly useful in situations where backcasting is not possible or desirable, such as when fishing in a small boat or when there is limited space behind the angler. To perform a roll cast, the angler holds the line in their hand and, with the rod tip pointed down, rolls the line forward over the top of the rod. This action causes the line to unroll and shoot forward, allowing the angler to cast without needing a large backcast.
In both contexts, roll casting is a method of achieving a specific outcome by using a rolling motion.