Double-cylinder circular hosiery knitting machine with device for tensioning the manufacture

Abstract

A double-cylinder circular hosiery knitting machine with device for tensioning the manufacture during its production, comprising a supporting structure (2) which is provided with a footing (3) and supports, so as to allow rotation about its own vertically oriented axis (4), a lower needle cylinder (5) and an upper needle cylinder (7), which can be positioned, during the production of the manufacture (12), above and coaxially with respect to the lower needle cylinder (5). The needle cylinders (5, 7) are actuatable with a rotary motion about their axes (4, 6) with respect to the supporting structure (2), and a device (1 1) for tensioning the manufacture (12) during its production is accommodated inside the needle cylinders (5, 7) and comprises means (13) for retaining the manufacture (12) proximate to the region where knitting is formed by the needles (10) accommodated in the needle cylinders (5, 7), and a tensioning tube (14), which is accommodated in the upper needle cylinder (7) and is movable on command along the axis (6) of the upper needle cylinder (7). The lower end of the tensioning tube (14) is engageable, by sliding along the axis (6) of the upper needle cylinder (7), with the region of the manufacture (12) being formed that lies from the retention means (13) to the needles (10). The retention means (13) have a size suitable to allow the movement of the tensioning tube (14) about the retention means (13), and means (15) for the translational motion of the tensioning tube (14) along the axis (6) of the upper needle cylinder (7) are provided. The retention means (13) comprise a suction tube (16), which is accommodated internally and coaxially to the lower needle cylinder (5), and an element (17) for locking the manufacture (12), which faces the upper end of the suction tube (16) and is supported by the upper needle cylinder (7). The locking element (17) is movable on command along the axis (6) of the upper needle cylinder (7) to engage or disengage the upper end of the suction tube (16).

Description

technical field [0001] The invention relates to a double cylinder circular knitting machine with means for tensioning finished products. Background technique [0002] As is known, double cylinder circular hosiery knitting machines are usually provided with means for tensioning the finished product during its production. [0003] EP727516 by the same applicant discloses a double-cylinder circular hosiery knitting machine provided with means for tensioning the finished product during its production, including means of keeping the area close to the machine where the needles form the knitwear and a tensioning tube housed in the upper syringe and movable on command along the axis of the upper syringe. The lower end of the tensioning tube can engage the area of ​​the finished article being formed from the retaining means to the needle by sliding along the axis of the upper needle barrel. The tension tube is sized to slide externally around the retaining means, translating along ...

AI Technical Summary

Problems solved by technology

[0011] The practical application of this pick-up device in a two-cylinder circular hosiery knitting machine encounters many difficulties, including, due to the presence of means for tensioning the finished product during its production, as described above , because at the end of production, the finished product is sucked into the upper cylinder, making it impossible to arrange a pick-up device of the above type around the upper end of the lower cylinder

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