摘要:
A sliver piecing unit 80 includes three sets of separable rollers 804 and 844, 806 and 846, and 808 and 848 for nipping a sliver S1 fed from a consumed can to a spinning machine. A throttling nozzle 870 is arranged between the second and third sets of rollers 806 and 846, and 808 and 848. The draft ratio between the first and second sets of rollers 804 and 844, and 806 and 846 can be varied between 1.0 and 2.0. A sliver feed unit 70 includes a separable first and second roller 702a and 702b for feeding a sliver S2 from a full can to the piecing unit 80 so that the slivers S1 and S2 are combined. The draft ratio between the first and second sets of rollers 804 and 844, and 806 and 846 is controlled to obtain combined slivers of a thickness corresponding to that of a single sliver. A nipping belt 884 and nipping roller 886 are provided at the outlet from the third set of the rollers 808 and 804 for obtaining a rubbing movement in the combined slivers. A breaking element 802 is provided at the inlet to the first set of the rollers 804 and 844 to break the first sliver S1 after the completion of the piecing operation.
摘要:
When a full bobbin signal from a counter CCM counting the number of rotations of the front roller (3) is output, the control element (28) outputs a signal directed to the control motor (M2) of a unit (29) for reciprocating a bobbin rail (10). As a result, the rotation of the control motor (M2) is combined with the rotation of a differential gear (14 ) connected to the main motor (M1), so that a reciprocating movement of the bobbin rail (10) after the full bobbin state is obtained which is faster than that obtained during a usual taking up operation of the roving, which causes the roving to be wound on the bobbin in a much coarser state than usual. A limit switch (LSP) detects a predetermined desired position of the bobbin rail (10), and the control element (28) outputs a signal directed to the unit (29), whereby the main motor (M1) and the control motor (M2) are stopped.
摘要:
In a roving winding apparatus applied to a roving frame provided with a plurality of draft parts and corresponding bobbin wheels, a bobbin shaft for driving the bobbin wheel, a bobbin rail on which the bobbin shaft is rotatably horizontally mounted along the longitudinal direction thereof, a lifting motion mechanism for lifting the bobbin rail, and a main motor for driving the draft parts at a predetermined rotational speed, wherein the bobbin shaft is driven under a controlled condition created by a servomotor to follow a digital signal output from the rotation angle detecting device applied to the common bottom front roller of the draft parts, in an adjusted optimal condition under the control of a computer system, incorporated with the lifting motion of the bobbin rail.
摘要:
When a residual amount R of a roving required to make a bobbin full at a desired stopping position A of the bobbin rail which moves upwardly is smaller than the amount (4.times.L) corresponding to remaining four layers of the roving for a normal winding process, a desired amount Q is calculated as the residual amount R divided by 4. The switching of the roving during the downward movement of the bobbin rail is done when the amount of the roving from the top end of the bobbin rail is equal to the desired spinning amount Q. This operation is repeated until a full bobbin amount is detected by an encoder, and the flyer frame is stopped.
摘要:
A flyer frame has a first AC motor for obtaining a general rotational movement of various parts of the frame and a second AC motor for obtaining only a variable component of the rotational movement of the bobbin. An inverter is provided for operating the first and second AC motor. A controller is divided into a general section for operating the frame powered by AC power source, and a winding section for obtaining a winding control of the frame. The winding control section is operated by a DC current, which is usually supplied by an outside AC source. A DC output of the inverter is connected to the winding section via a diode or relay, which usually disconnects the DC line to the winding section and which is closed upon the occurrence of the power failure, for supplying a regenerating current from the inverter to the winding section. A desired winding control is thus maintained upon the occurrence of the power failure, until the stoppage of the frame, to prevent rovings at respective spinning positions from being broken.
摘要:
An aluminum alloy conductor, containing: 0.01 to 0.4 mass % of Fe, 0.1 to 0.3 mass % of Mg, 0.04 to 0.3 mass % of Si, 0.1 to 0.5 mass % of Cu, and 0.001 to 0.01 mass % of Ti and V in total, with the balance being Al and inevitable impurities,wherein the conductor contains three kinds of intermetallic compounds A, B, and C, in which the intermetallic compounds A, B, and C have a particle size of 0.1 μm or more but 2 μm or less, 0.03 μm or more but less than 0.1 μm, and 0.001 μm or more but less than 0.03 μm, respectively, and area ratios a, b, and c of the intermetallic compounds A, B, and C, in an arbitrary region in the conductor, satisfy: 0.1%≦a≦2.5%, 0.1%≦b≦3%, and 1%≦c≦10%.
摘要:
An aluminum alloy wire material, which has an alloy composition containing: 0.1 to 0.4 mass % of Fe, 0.1 to 0.3 mass % of Cu, 0.02 to 0.2 mass % of Mg, and 0.02 to 0.2 mass % of Si, and further containing 0.001 to 0.01 mass % of Ti and V in total, with the balance being Al and unavoidable impurities, in which a grain size is 5 to 25 μm in a vertical cross-section in a wire-drawing direction thereof, and an average creep rate between 1 and 100 hours is 1×10−3 (%/hour) or less by a creep test under a 20% load of a 0.2% yield strength at 150° C.
摘要:
An aluminum alloy wire material, which has an alloy composition containing: 0.1 to 0.4 mass % of Fe, 0.1 to 0.3 mass % of Cu, 0.02 to 0.2 mass % of Mg, and 0.02 to 0.2 mass % of Si, and further containing 0.001 to 0.01 mass % of Ti and V in total, with the balance being Al and unavoidable impurities, in which a grain size is 5 to 25 μm in a vertical cross-section in a wire-drawing direction of the wire material, in which, according to JIS Z 2241, a tensile strength (TS) is 80 MPa or more, an elongation (El) is 15% or more, and a 0.2% yield strength (YS; MPa) satisfies, together with the TS, a relationship represented by formula: 1.5≦(TS/YS)≦3, and in which an electrical conductivity is 55% IACS or more.