摘要:
In order to hold at a minimum the noise emission of the winding gear in a winding unit of a spinning machine for the processing of endless filaments, the winding unit is provided with a noise protection door which is pivotingly translatable from an initial or idle position at the side of the winding unit into an operating position in front of the winding unit. The noise protection door comprises a guide portion which is supported or guided by means of rolls and guide pins and a noise protection portion pivotally supported on the guide portion by means of pivot pins. The guide pins forming part of the guide portion and the guide pins forming part of the noise protection portion project into two guide grooves arranged in mirror-image fashion, one of which is provided in a floor plate and the other in a cover of the winding unit. Thus the guide portion is guided in a straight line and the noise protection portion is pivotally guided.
摘要:
A winding apparatus for forming laps has two winding rollers and on each side thereof a carrier arm for receiving a lap bobbin. Each carrier arm is pivotably connected on one end with a sliding guide and on the other end with a pivoting mechanism. A hinge joint and a pivot pin provide these pivotal connections. The pivot mechanism is pivotally supported in side walls of the apparatus by shafts. The pivotal movement is accomplished by a pressure air cyclinder. During pivoting of the pivoting mechanism about the shafts the carrier arms are shifted in a predetermined direction. In FIG. 1, the lowermost position of the therein depicted carrier arm is shown in which the lap bobbin rests on the winding rollers. Through rotation of the winding rollers the lap bobbin rotated and takes up a web delivered from calender rollers for the formation of a lap. The build-up of the lap causes lifting of the carrier arms in such predetermined direction. To produce a predetermined contact pressure between the lap and the winding rollers, a pressure controlled by a pressure reducing valve is built-up in the pressure air cylinder. To controllably reduce this air pressure in the pressure air cylinder the pressure reducing valve is controlled by a control rule. This control rule is connected with the sliding guide and simultaneously moves with and in the same direction as the carrier arms. Through the control of the air pressure by the control rule the advantage is obtained that the contact force between the lap and winding rollers is controllable such that the contact pressure can be held substantially constant during building-up of the lap.
摘要:
To avoid damage to apparatus for opening textile fiber bales by foreign bodies, a fiber diverting member, against an edge of which such foreign bodies strike during opening of the fiber bales, is mounted to be pivotable out of either one of two possible predetermined fiber diverting positions.
摘要:
A false twist unit comprises a suction portion with a suction channel and with an expansion space connected at the throat portion or narrowest position of the suction channel, which expansion space is connected by means of an air connector or exit to a source of negative pressure. A throttle location connects the expansion space with a pneumatic twist imparting means. In the pneumatic false twist spinning process known from the German published Pat. No. 2,722,319 a sliver delivered from an exit roller pair of a drafting mechanism is forwarded through the suction channel in a predetermined direction and thereafter through the throttle location into the twist imparting means. The twist imparting means produces in the core of the yarn or thread a false twist which builds up in such yarn or thread towards the exit roller pair. The wrapping fibers required for the finished yarn or thread are sucked in as edge fibers through the suction channel simultaneously with the yarn core. By means of the expansion space the advantage is obtained that the air flow can be sucked away without substantial disturbance to the yarn travel path in a direction substantially at right angles to such yarn travel path.
摘要:
An apparatus for the conjoint gripping of bobbins by means of pins or spigots formed of a rigid material, mounted at a support or carrier, and insertable into the bobbins. An expansible hose or tube member extends lengthwise of the support, this hose member when subjected to an increased internal pressure serving to press the bobbins against the pins or pin members inserted therein. This known apparatus has the advantage that there does not occur damage to the entering pin members, nor does there arise permanent deformation or destruction thereof. Yet, such apparatus possesses the shortcomings that the seized bobbins, when pressed against the pin members, are not positioned with sufficient accuracy in a direction parallel to the longitudinal direction of the support. The invention avoids such drawback in that, there are provided two straight edges at each pin member at the side thereof confronting the hose member, such too straight edges extending in the longitudinal direction of the related pin member and serving as contact surfaces for the bobbin pressed thereagainst.
摘要:
To ensure for the effective removal by suction of thread breaks, even at long ring spinning machines in an economical manner, a second duct or channel is provided above a package creel and parallel to a first suction duct or channel. Both ducts discharge into a common suction chamber. Connecting channels conduct a portion of the air quantity sucked-up by suction nozzles into the second duct or channel. The cross-section of the second duct is enlarged, with increasing length of such duct, in a manner such that there prevails in both ducts essentially the same mean air velocity.
摘要:
With the creel for a spinning machine according to the invention at least two rows of rotatably suspended roving bobbins, which extend essentially in parallelism with respect to one another, are adjacently lined-up. Normally in ring spinning machines there are employed for such creels roving deflecting rods which extend horizontally in the longitudinal direction of the ring spinning machine. The rovings extending from the roving bobbins to the drafting arrangements are guided around the deflecting rods for the purpose of guiding the rovings. If the deflecting rod is located behind the bobbins, then insertion of the rovings about the rods is extremely cumbersome, and additionally, there exists the danger of damaging the rovings. If the deflecting rod is located further towards the front, then exchange of the bobbins becomes tedious. These drawbacks are eliminated with the invention in that a row of substantially rod-shaped holders is arranged behind the front row of roving bobbins. One end of each of the holders is rigidly mounted, and the other end of each holder is provided with at least two guides for rovings. These rovings extend directly from the related roving bobbins by means of the guides to the drafting arrangements.
摘要:
The invention concerns the pneumatic cleaning of spinning rotors for open-end spinning. Cleaning is accomplished in a manner such that the spinning rotor is brought to standstill and a cleaning device is snugly seated by means of its cleaning cover upon the rotor housing. Thereafter, during a suction operation there is particularly sucked away the part of the contaminants or impurities forming a fiber ring. Then, there is formed an air jet by means of pressurized or compressed air and a blower head which is introduced into the internal space of the rotor. This air jet while rotating frees the remaining contaminants or impurities, especially the dust-like contaminants, which are then likewise removed by suction.In comparison to the presently known cleaning methods working with air it is possible, by virtue of the standstill of the spinning rotor and the provision of cleaning steps which are accommodated to the encountered types of contaminants or impurities, to realize an appreciably improved cleaning operation. In contrast to cleaning devices working with rotating brushes there is here eliminated the drawback of possibly scratching the inner surface of the spinning rotor. Additionally, there is prevented the shortcoming that fibers and yarn remnants tend to cling to cleaning brushes and thus clog the same, so that they more or less loose their desired cleaning action.
摘要:
The present invention concerns a method and an apparatus for producing a draftable staple fibre sliver (12) from a strand (12) of endless filaments, which is united and condensed for further processing. According to the invention the zone of the united and condensed sliver, from which, due to the cutting process, fibre points stick away inclined and pointed towards the front and outside, is inserted into the inside of the sliver.In this manner the detrimental effects, caused by the fibre points sticking out, are eliminated. Particularly the defective points in the end product produced, caused by these fibre points, are eliminated, fly waste generation in the processing room is reduced and, owing to the reduction of the danger of clogging of the fibre sliver guiding funnels, the operational reliability of the subsequent processing machines is improved.
摘要:
A method and apparatus for taking-in a fibre layer in blow-room machines wherein the fibre layer is pressed by a number of pivotable pedal levers distributed across the width of the machine, and loaded by a pressing device, against a take-in roll. In the absence of fibre material between the take-in roll and the pedal levers, the pedal levers are temporarily lifted-off the take-in roll.