摘要:
A warp thread control system for forming the loom shed as a first control section (1) and a second warp control section (16). The first section is equipped with at least one guide element (2) for guiding the leno threads (3) and a guide rod (4) carrying a multitude of passages 6 arranged and parallel to one another for guiding the ground threads (5). The second warp control section (16) includes a thread detour element (17) for detouring the leno threads (3) and a needle bar (18) carrying a multitude of needles (19) with needle eyes (19.1) for guiding the leno threads (3). Both the first warp control section (1) and the second warp control section (16) are positioned on the side of the reed facing the warp threads whereby the positioning may differ either above or below a weaving plane (28) or partially above and partially below the weaving plane (28). Preferably but not necessarily both warp control sections are driven by a common drive (11).
摘要:
A weft thread insertion nozzle includes a thread supply tube (3) and a mixing tube (8) arranged in axial alignment in a housing (4). An outlet end section (3A) of the thread supply tube (3) reaches into and overlaps an inlet section (8A) of the mixing tube (8), with an airflow channel (5A) provided between the outlet end section (3A) and the inlet section (8A). A plurality of notches (11) or through-holes (13, 14, and 15) are arranged distributed around the circumference of the outlet end section (3A). The jet medium accelerated through the airflow channel (5A) can enter the tube (3) through the notches (11) or holes (13, 14, and 15), whereby the jet medium expands and entrains the weft thread before entering into the mixing tube. By shifting the air expansion and entrainment of the weft thread upstream, turbulence is avoided and the weft thread is more gently and positively entrained so as to improve the performance of the insertion nozzle.
摘要:
Faults in fabrics such as smooth woven fabrics or pile fabrics caused by transition operational conditions are avoided, especially on air nozzle weaving looms. Such transition operational conditions may occur when rated operating parameters must be changed, for example, due to the use of a different type of weft thread or a change in the weaving pattern and/or weave binding. For this purpose, the weft thread insertion is interrupted only during the duration of the so-called transition operational conditions. Weft insertion is interrupted by performing so-called fluidic or non-fluidic empty or mis-shots. Simultaneously, the warp let-off and the fabric take-up is controlled as a function of the number or duration of the empty or mis-shots in such a way that at this point of time during the transition operating conditions the beat-up edge of the fabric is held in a position away from the beat-up position of the reed.
摘要:
The aim of the invention is to obtain a plain weave and gauze weave in a textile that is to be produced, in one weaving cycle, thus economising in terms of expensive shed-forming elements. To achieve this, according to the invention, the plain weave (16) and gauze weave (15) are formed simultaneously in the textile (9) in one weaving cycle. To form the plain weave (16), the adjacent warp threads (1L,2L) that are used to form the upper shed and lower shed are alternately lifted by the same drop wire/needle shank (4) from the lower shed position into the upper shed position and lowered from the upper shed position into the lower shed position. To form the gauze weave (15), only the warp threads (2D) that form the upper shed are raised in a known manner by the drop wire/needle shank (4) from the lower shed position into the upper shed position and lowered from the upper shed position into the lower shed position.
摘要翻译:本发明的目的是在一个织造周期中获得在待生产的纺织品中的平纹编织和纱布编织,从而在昂贵的棚形成元件方面节约。 为了实现这一点,根据本发明,平织(16)和纱布(15)在纺织品(9)中以一个织造周期同时形成。 为了形成平纹织物(16),用于形成上棚和下棚的相邻经线(1LL,2LL)交替地被 相同的落线/针柄(4)从下梭口位置进入上梭口位置,并从上梭口位置下降到下梭口位置。 为了形成纱布(15),只有形成上部梭口的经线(2 SUB D)以已知的方式由落纱线/针柄(4)从下部梭口位置 进入上部梭口位置并从上部梭口位置下降到下部梭口位置。
摘要:
Ground warp and pile warp thread sheets are supplied to a shed forming device. The ground warp and the pile warp are separately deflected over a deflecting rod upstream from the shed forming device. The deflecting rod supports the ground warp and directs the pile warp to cross and interpenetrate through the ground warp before deflecting the pile warp into the back shed. The deflecting rod is positively driven and controlled to pivot about a horizontal axis to provide a positive controlled partial compensation of the pile warp thread length variations. The pile warp also runs over a pile warp thread reserve and compensating device upstream from the thread crossing location to provide an additional passive uncontrolled compensation of the pile warp thread length variations and to provide a pile warp thread reserve during the pile loop formation and/or the shed changes in the weaving process.
摘要:
A ground warp thread sheet and a pile warp thread sheet are supplied to a shed forming device. Two stop motions on separate planes respectively monitor the pile warp and the ground warp. The ground warp and the pile warp are deflected over a deflecting rod upstream from the shed forming device. The deflecting rod supports the ground warp and directs the pile warp to cross and interpenetrate through the ground warp before being deflected into the back shed. The vertices of the ground warp and pile warp back sheds are thus located on opposite sides of the deflecting rod. The pile warp crosses through the ground warp directly upstream from the deflecting rod, at a steep angle, for example from 45 to 135 °.
摘要:
A leno ground fabric is produced over the entire weaving width of a loom by using two heald frames each having a length corresponding to the weaving width. The heald frames are equipped with a multitude of lifting healds or heddles and with a multitude of half healds or heddles that move the leno warp thread and the ground warp threads for the shed formation over the entire loom width.
摘要:
The air distributor and control unit contains a stator with an outlet port and a rotor which is rotatably mounted within the stator with an opening to permit a flow of air to the outlet port. A control element is provided between the rotor and stator to control the supply of medium from a pressure chamber to the outlet port. The control element may be in the form of interfitting shell type members which can be adjusted to change the beginning, end and/or duration of blowing for a given nozzle.
摘要:
In a weaving machine for the production of a leno fabric including ground, leno, and weft threads, in which ground and leno threads form warps, the drive of the guide means (8) for the ground threads and/or of the guide means (7) for the leno threads (2) is derived from the drive means of the sley.
摘要:
An electromagnet exhibits in its energization curve (I=f(t)) a characteristic feature or indicator, for example, in the form of a dip (1′, 2′) in the energization current. This indicator is used to control the operation of the magnet, for example, to synchronize its operation with that of another magnet. In a loom the operation of a weft stop magnet positioned next to a weft prewinder may be synchronized with the operation of a solenoid driving a valve that supplies air to the main weft insertion nozzle and/or relay nozzles. A magnet may also be controlled with reference to rated operation values so that its actual operation value coincides with the rated value or values or at least is maintained within a permissible tolerance range of rated values. The control takes place in closed loop fashion, for example, through the main loom control.