Ring-spinning or ring-twisting machine with restart control
AssigneeZinser Textilmaschinen GmbH
InventorHorst Wolf
Life of this patent
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Abstract
An improved ring spinning machine for making a filled bobbin of yarn, thread or the like comprises at least one ring rail which moves up and down near a plurality of spindles driven by a ring rail drive. A control for the ring rail drive in case of an unforeseen machine stoppage, is arrayed so as to cause the ring rail drive, when it would otherwise drive the ring rail in the upward direction on restart because the ring rail was moving up at the time of shut-off, to reverse so that the ring rail moves downward no later than the time of restart of the spindles, so that the ring rail moves downward after the unforeseen machine stoppage at the beginning of restart thus providing for a safer, more reliable spinning operation.
Claims10
A machine for producing a yarn bobbin comprising:
- at least one ring rail which moves up and down,
- a plurality of spindles,
- a ring rail drive to drive said spindles,
- a control means for said ring rail drive, which, in case of unforeseen machine stoppage, causes said ring rail drive, when said ring rail drive would otherwise drive said ring rail in the upward direction on restart because said ring rail had been moving upward at the instant of shut-off, to reverse so that said ring rail motion direction is downward no later than the time of said restart of said spindles, so that said ring rail runs in said downward direction after said unforeseen machine stoppage at the beginning of said restart.
A method of
- operating a spindle bank having a ring rail and winding yarn on respective bobbins on respective spindles of said spindle bank, comprising the steps of:
- (a) detecting at least one indication of unforeseen stoppage of the spindle bank including:
- (i) failure of electrical current supply to a drive motor for said bank,
- (ii) mechanical overload, and
- (iii) emergency switch operation;
- (b) automatically determining the position of said ring rail upon the development of said at least one indication;
- (c) at the latest upon restarting of said spindle bank switching over automatically the direction of operation of a drive for said ring rail if the position of said ring rail is such that it would tend to rise upon startup, thereby ensuring that said ring rail will move downwardly on startup;
- and
- (d) restarting said spindle bank.
Dependencies are inferred from the claim text.