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Rapala (/ ˈ r æ p ə l ɑː / RAP-ə-lah) [1] is a fishing product manufacturing company based in Finland. It was founded in 1936 by Lauri Rapala, who is credited for creating the world's first floating minnow lure carved from cork with a shoemaker's knife, covered with chocolate candy bar wrappers and melted photography film negatives, for a protective outer coating. [2]
Spin casting, also known as centrifugal rubber mold casting (CRMC), is a method of utilizing inertia to produce castings from a rubber mold. Typically, a disc-shaped mold is spun along its central axis at a set speed. The casting material, usually molten metal or liquid thermoset plastic, is then poured in through an opening at the top-center ...
Jig borer. The jig borer is a type of machine tool invented at the end of World War I to enable the quick and precise location of hole centers. It was invented independently in Switzerland and the United States. [1] It resembles a specialized kind of milling machine that provides tool and die makers with a higher degree of positioning precision ...
Lauri Rapala (1905–1974) was a Finnish fisherman, inventor and the founder of Rapala -Normark Group, the world's largest fishing lure and tackle producer. He died in 1974 at the age of 69. During the course of his life, he married once and fathered seven children. [ 1 ] He created one of the first artificial fishing lures in 1936, which later ...
A jig grinder is a machine tool used for grinding complex shapes and holes where the highest degrees of accuracy and finish are required. The jig grinder is very similar to a jig borer, in that the table positioning and spindles are very accurate (far more so than a manual milling machine or lathe).
A jig used in making jewelry, a specific type of jig, is a plate or open frame for holding work and helping to shape jewelry components made out of wire or small sheets of metal. A jig in the jewelry making application is used to help establish a pattern for use in shaping the wire or sheets of metal. In the jewelry application, the shaping of ...
Plastic forming machines, or plastic molding machines, were developed on the basis of rubber machinery and metal die-casting machines. After the inception of the polymer injection molding process in the 1870s, plastic-forming machines were rapidly developed up until the 1930s. With the gradual commercialization of plastic molding equipment ...
A machine tool is a machine for handling or machining metal or other rigid materials, usually by cutting, boring, grinding, shearing, or other forms of deformations. Machine tools employ some sort of tool that does the cutting or shaping. All machine tools have some means of constraining the workpiece and provide a guided movement of the parts ...
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