Last with grip device for shoemaking

Abstract

The invention concerns a last ( 2 ) serving as template for making shoes, designed for use in an automatic or semi-automatic shoemaking installation. It is provided with a grip device ( 4 ), enabling it to be gripped and / or immobilized by external complementary members, such as the jaws of a manipulator robot's clamp. The last ( 2 ) is produced as a part ( 3 ) initially cast in synthetic material. An insert ( 10 ) is embedded in the material of said part ( 3 ) and designed to receive the elements ( 7, 8 ) of the grip device ( 4 ). Said elements ( 7, 8 ) serve as support and reference for machining the cast part, so as to obtain the final configuration ( 22 ) of the last ( 2 ).

Description

technical field [0001] The invention relates to a shoe last with a clamping device for making shoes, in particular to a shoe last used for automatic or semi-automatic shoe making equipment. Background technique [0002] In the manufacture of shoes, it is known to usually employ specialized wooden or synthetic models, called "lasts", which simulate various characteristics of the foot: size, left or right foot and style and relative to the manufactured shoe The appearance of details. The "upper" is first made on the last, then the part of the sole called the "insole" is attached, followed by most of the other manufacturing steps of the shoe, such as roughing and joining so that the parts of the shoe wrap around the shoe Lasted. [0003] Typically, shoe manufacturing is done by hand, during which each last that supports the upper is manually transported from one machine to another. However, we also know that in an automated or semi-automated shoe production line, chains, tra...

AI Technical Summary

Problems solved by technology

The last must then be repositioned on a mold, the surface to accommodate the clip is machined, and finally holes are machined into the last to hold the clip, it is difficult to locate these holes precisely

Therefore, there are many imprecision and error factors mixed with each other

[0008] Since the clip is also used as a reference for positioning the shoe last on the processing robot or on the bracket of the shoe production line, it can be seen that these inaccuracies will lead to the positioning of the shoe last itself when the shoe parts are made on the shoe last. Poor, which introduces manufacturing errors or manufacturing problems and, in all cases, lack of reproducibility

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