Color change device of circular knitting machine

Abstract

The invention discloses a color changing device of a circular knitting machine, which comprises a selector, a controller, a yarn supply unit, and a drive unit, the yarn supply unit includes two parts, the first part includes a yarn changer The first part is used to feed the yarn to the yarn eating position, and the second part includes a movable knife plate, which is used to clamp the end of the yarn when it is on standby, and to cut off the old yarn to make it Break away from the fabric and return to the standby state; the preferred embodiment of the present invention is to use different cams to drive the yarn changing board and the movable knife board respectively, even if the positions of the new and old yarns are far apart when changing the yarn, it can also be adjusted and controlled The action timing of different cams allows the tail end of the new yarn to be released from the movable knife plate before it is torn off, preventing the yarn from being torn to avoid the generation of yarn tails, thereby improving the quality of the fabric.

Description

technical field [0001] The invention relates to a color changing device of a knitting machine, in particular to a color changing device used in a circular knitting machine. Background technique [0002] The technology of using color-changing devices in circular knitting machines has been known for a long time, for example, in "STRIPING APPARATUS FOR CIRCULAR KNITTING MACHINES" of US Patent No. 6655176 that has been approved, and "STRIPING SYSTEM FOR CIIRCULARKNITTING" of US Patent No. 5070709 All disclose a kind of discoloration device that is used to feed the knitting needle of knitting machine with different yarns in " MACHINE " respectively. In addition, the approved US Patent No. 5218845 "CIRCULAR KNITTING MACHINE STRIPER CONTROL SYSTEM" discloses a controller used in the color changing device. [0003] The discoloration device disclosed in the aforementioned U.S. Patent No. 5,218,845 has a structure such as Figure 1-1 to Figure 1-4 As shown, it includes: a yarn changi...

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Problems solved by technology

[0005] Generally speaking, this discoloration device can provide yarns of several different colors. For example, a four-color discoloration device will have four groups of yarn changing boards 10 and movable knife boards 11 that are arranged side by side for four kinds of yarns respectively. Replacement, six-color discoloration device is also the same, the number of yarn is more, the width of discoloration device is also wider; And the discoloration device disclosed in the aforementioned U.S. Patent No. 5218845, because the action of movable knife plate 11 is by changing yarn plate 10, so when the yarn changer 10 is moved towards the normal position by the driving element, it will be slightly delayed before hitting the second pin 112 of the movable knife plate 11. This design driven by the same driving element will make The time for the movable knife plate 11 to cut the yarn Y is slightly delayed; if the positions of the old and new yarns are far apart when changing yarns, such as yarn No. 1 and yarn No. The design of the yarn changing board 10 will increase the time difference of its action due to the distance between them, and it is easy to make the time for releasing the yarn Y too slow, so that the tail end of the yarn Y is still clamped by the movable knife plate 11 Under the circumstances, it is torn off first and a section of yarn end Y1 remains (see Figure 1-2 ), and when the torn yarn tail Y1 is released and falls, it is easy to be brought into the fabric with the movement of knitting, which will affect the quality of the fabric

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