Winding machines with contact roller driven by synchronous motor or asynchronous motor
AssigneeBarmag Barmer Maschinenfabrik AG
InventorsHans Lohest, Erich Lenk, Peter Illg
Life of this patent
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Abstract
A filament winding machine having a winding spindle driven by an rpm-controllable electric drive motor, a contact roller in frictional contact with the rotating winding being formed and driven by a synchronous or an asynchronous, 3-phase electric motor and an electric control circuit responsive to deviations in the measured effective power absorption of the latter motor for maintaining a constant linear take-up velocity of the filaments onto the winding.
Claims19
A winding machine adapted for the winding of synthetic polymer filaments on a bobbin mounted on a winding spindle which comprises a winding spindle driven by a rate of rotation-controllable axial drive motor, a contact roller adapted to be in frictional contact with the surface of the forming winding, said roller being driven by a synchronous electric motor at a constant circumferential speed, and electric circuit conrtol means operatively connecting said motors and regulating the rate of rotation of said axial drive motor in dependence on the measured effective power absorption of said synchronous motor when said contact roller is rotating in frictional contact with said surface of said winding.
A winding machine adapted for the winding of synthetic polymer filaments on a bobbin mounted on a winding spindle which comprises a winding spindle driven by a rate of rotation-controllable axial drive motor, a contact roller adapted to be in frictional contact with the surface of the forming winding, said roller being driven by an asynchronous, 3-phase electric motor operable at a constant, prescribed, desired effective power, and electric circuit control means operatively connecting said motors and regulating, via rate of rotation control of said axial drive motor, the asynchronous motor up to negligible deviations of said desired effective power, in dependence on the measured effective power absorption of said asynchronous motor when said contact roller is rotating in frictional contact with said surface of said winding.
A winding machine adapted for the winding of synthetic power filaments on a bobbin mounted on a winding spindle which comprises a winding spindle driven by a rate of rotation-controllable axial drive motor, a contact roller adapted to be in frictional contact with the surface of the forming winding, said roller being driven by a 3-phase electric motor at a constant circumferential speed, an adjustable frequency transformer connected with the 3-phase motor, means for measuring the current in a power line of the three-phase current motor and giving a responsive measuring signal, an adjustable desired-value setting means which generates an adjusted, constant desired signal, and means for comparing the prescribed constant desired signal with the measuring signal, means for the generation and amplification of the difference signal, and further means for controlling the rate of rotation of the axial drive motor whereby its rate of rotation is altered when the difference signal exceeds a prescribed value.
A process for the winding of filaments on winding bobbins at constant, predetermined, peripheral speed of the winding being formed by driving and controlling the rate of rotation of a drive spindle and its chuck on which are mounted a winding bobbin and the winding formed thereof by:
- a. rotatably driving the spindle and its chuck by an electric drive motor,
- b. controlling the rotational speed of said drive motor,
- c. contacting the peripheral surface of the winding being formed by a rotatable contact roller,
- d. driving said contact roller by a three-phase alternating current electric motor connected to a frequency transformer,
- e. adjusting the frequency of said frequency transformer and thereby adjusting the peripheral speed of the contact roller, when said contact roller is without load, to the speed or slightly higher than the predetermined constant peripheral speed of the winding,
- f. measuring the current in one phase of said alternating current motor and producing a measuring signal,
- g. producing a controllable constant signal, representing the wattage, by which the contact roller is acting on the winding, by adjusting a controllable signal producing means,
- h. comparing said measuring signal, representing the current in said one phase, and said constant signal and producing a difference signal, representing the difference between both signals,
- i. feeding said difference signal into a control means connected to said drive motor for said spindle and its chuck,
- j. and thereby controlling the rotational speed of said drive motor when said difference signal exceeds a predetermined constant value in a sense of changing the rotational speed of said drive motor to return said difference signal to its predetermined constant value.
Dependencies are inferred from the claim text.