摘要:
When an open end spinning machine is stopped, a fiber supply to a spinning rotor is first stopped and thereafter, substantially simultaneously with stoppage of both a yarn take-up roller and a yarn winding roller, a yarn end is held by a yarn holding device at a time when it still remains in a region which undergoes the suction effect of a subatmospheric pressure produced in the spinning rotor. The spinning rotor is subsequently stopped. On starting, the holding of the yarn end by the yarn holding device continues even after restarting of the spinning machine until the subatmospheric pressure produced in the spinning rotor reaches substantially the same value as that produced during a normal spinning operation. Therefore, there is prevented any snarling phenomenon, resulting in a greatly increased success rate in the operation of connecting yarn ends on re-starting of the spinning machine.
摘要:
An open end spinning machine includes a plurality of spinning units. Each spinning unit includes a first yarn breakage sensing device assuming a yarn sensing, operative position, in which it contacts the yarn, when the spinning unit is in a normal spinning operation and an inoperative position, in which it is not in contact with the yarn, when the spinning unit is in a transient condition either from or to the normal spinning operation, and a second yarn breakage sensing device assuming a yarn sensing position at least when the spinning unit is in the transient condition. Upon occurrence of yarn breakage when the spinning unit is in the transient condition, such breakage is detected by the second yarn breakage sensing device and the supply of fibers to the associated spinning unit is interrupted by the second yarn breakage sensing device.
摘要:
In a fiber opening device in open-end spinning unit, having a combing roller which is encased by a casing and forming a fiber transferring passage between said combing roller and said casing, a wear-resistant member, preferably a member having a pin shape, is provided at an edge of an opening, e.g. a trash exit port opening formed in said casing and communicated with said passage. The structure of the fiber opening device according to the present invention makes possible easy installation of the wear-resistant member, and prevents harmful wear or bruising at said edge portion of the opening in the casing.
摘要:
In an improved combing roller provided with a metallic wire mounted on a body thereof comprising a main cylindrical body and a pair of flanges coaxially formed at both ends of the main cylindrical body, a base portion of the metallic wire rigidly pressed into a right hand or a left hand helical groove formed in the main body and the working direction of the metallic wire coincide with the rotational direction of the combing roller, if one of flanges on a side of the combing roller corresponding to the direction of progress of an imaginary right hand screw imaginarily engaged with the above-mentioned right hand helical groove or an imaginary left hand screw imaginarily engaged with the above-mentioned left hand helical groove when the imaginary screws are turned in the direction corresponding to the rotational direction of the combing roller, is defined as a first flange, while the other flange is defined as a second flange, the axial size of the free cylindrical space formed at the side of the first flange is smaller than the axial size of the free cylindrical space formed at the side of the second flange.
摘要:
A yarn handling machine includes bobbins on which yarns are wound, forming cheeses. At the beginning of the yarn winding operation, transfer tail windings must be provided on the end of the bobbin.An arrangement for providing transfer tail windings includes a yarn guide movable between an operative position closely adjacent to the bobbin and an inoperative position spaced from the bobbin sufficient to prevent interference of the yarn guide with the formation of the cheese. In the operative position, the yarn guide serves for providing the transfer tail windings.
摘要:
According to this invention, a spinning rotor is increased in speed until it reaches a predetermined higher speed beyond a lower speed region and then decreased in speed until it falls within the lower speed region, in which a yarn ending is effected. Thereafter, the speed of the spinning rotor is increased to a normal spinning speed beyond the predetermined higher speed. During rotation of the spinning rotor at the predetermined higher speed, sufficient subatmospheric pressure is produced in the spinning rotor to stretch out the yarn end thereby to prevent the yarn end from being snarled. Also, during this higher speed rotation of the spinning rotor, sufficient fibers in the spinning rotor can be collected in a maximum diameter portion in the spinning rotor to be connected with the snarl-free yarn end in a favorable condition. The period of time, during which the speed of the spinning rotor is decreased from the predetermined higher speed and falls within the lower speed region, is relatively short being in the order of a few or several seconds. Therefore, it will be understood that there is no fear that both the yarn end and the remaining fibers are restored to their initial state during that period of time.
摘要:
Disclosed is an open-end spinning machine and a method of restarting the same. The machine comprises: feed rollers, for supplying fibers to a combing roller so as to comb the fibers; a spinning rotor, for collecting the combed fibers into a yarn and for twisting the yarn, connected to a power source via an endless driving belt; a pair of draw off rollers, for withdrawing the yarn from the spinning rotor, connected to a brake and to a main power source via a clutch; a traverse guide, for traversing the withdrawn yarn along a bobbin supported by a pair of cradle arms, connected to a brake and to the main power source via a clutch; a winding drum, for frictionally driving the bobbin to wind the yarn around the bobbin and form a conical cheese, connected to a brake and to the draw off rollers via gear trains, and; a controlling device, for controlling the brakes and clutches according to a predetermined program, by which, on the occasion of stopping said machine, the traverse guide is stopped at a predetermined position before both the draw off rollers and the winding drum are stopped and, on the occasion of restarting said machine, the traverse of the traverse guide is started toward the smaller diameter portion of the conical cheese, when a pieced joint formed between an end of the yarn and a newly spun yarn reaches a contacting line formed between the pair of draw off rollers. By utilizing this machine and method, the number of yarn breakages occurring during the starting operation is decreased.
摘要:
An object of the present invention is to provide hydrogen-reduced water which contains a relatively large amount of dissolved hydrogen as a reactive substance having a relatively high reaction rate with respect to active oxygen in human body, has a relatively high rate of temperature change, and therefore is able to efficiently remove active oxygen, and also provide a production method and a storage method of the hydrogen-reduced water. To achieve the object, the present invention provides hydrogen-reduced water, having under a predetermined temperature condition a rate of temperature change higher than that of a water not containing hydrogen therein.
摘要:
The present invention relates to a mounting apparatus for leadless electronic parts wherein leadless electronic parts 3 supplied through a cylindrical chute 5 are dropped one by one into a part holding hole 7 of a part feeding pusher 6, with the part holding hole having a cutout, the part feeding pusher 6 transports the leadless electronic part 3 between chucks 10 and 11, and then a main block 8 including the chucks 10 and 11 is pivoted such that the leadless electronic parts 3 are taken out and mounted on a mounting portion of a printed circuit board 1 rapidly and reliably.
摘要:
A lid device for a wide-mouthed container comprises a metallic lid body having an inner margin defining an opening of a predetermined shape, a resinous rim member extending along and anchored to the inner margin of the lid body, and a closure film attached to the rim member to close the opening of the lid body. The lid body is fittable to an open mouth of the container. For opening, the closure film may be peeled off the rim member or torn along the rim member.