CZ306172B6 - Weaving machine for producing combined weaves of ground and gauze weaves - Google Patents

Abstract

The weaving machine for producing combined weaves of ground and gauze weaves according to the present invention comprises a device for controlling at least three systems (2, 3, 4) of warp threads and a weaving reed (11) with lamellas having gaps therebetween for passage of the warp threads. At least two systems (2, 3, 4) of the warp threads are guided into base distribution means (15) producing a motion necessary making a shed for weft propulsion and for mutual interlacing of the warp threads. At least one system (2, 3, 4) is guided via a displacing horizontal bar (18) to guide means (13) of the rotating warp threads. The base distribution means (15) consist of beams (152, 153) and needles and/or semi-heddles (142, 143). The beams (152, 153) are coupled with separate electronically controlled drives. The guide means (13) of the rotating warp threads comprise eye-pointed needles (12) for guiding the rotating warp threads.

Description

Weaving machine for the production of combined basic and bead weaves

Field of technology

The invention relates to a weaving machine for the production of combined base and bead weaves, comprising a device for controlling at least three sets of warp threads and a weaving beam with lamellae between which there are gaps for the passage of warp threads, at least two sets of warp threads being guided into basic sorting means realizing the movement necessary to form a shed for passing the weft and for interconnecting the warp threads, and at least one is guided via the deflection bar into the guide means of the rotating warp threads.

Prior art

Fabrics with a combination of basic (or derived) weaves and bead weaves have specific mechanical properties, especially feed strength, but also have specific patterning-decorative possibilities. In the past, combined ties were used mainly in the production of curtains by a combination of jacquard and beaded weave. At present, technical fabrics with a combined canvas and bead weave are gaining in importance, which show increased shear strength and resistance to deformation. Known devices for the production of fabrics with a combined weave use a heddle belt to control the warp threads. It is common for the basic weave web to be located closer to the warp and the bead web to be located closer to the weaver. However, the use of heddle systems for the formation of bead bonds brings the main disadvantage in the form of low working speed. This disadvantage cannot be eliminated with combined binding machines. Although it is known to increase the working speed in the formation of purely beaded weaves using netless systems, eg according to CZ PV 2003— 2887, these systems are so far intended exclusively for weaving an uncombined purely beaded weave.

U.S. Pat. No. 4,429,772 A discloses a weaving machine for producing combined basic and bead weaves, in which the weaving point of the basic (canvas) weave is wrapped around the bead yarn. The bead shed device, into which the yarns of the bead system are fed from separate spools situated outside the basic machine, is the needle and warp yarns of the bead system are guided over a crossbar, but the canvas shed device is heddle and the warp yarns of the bead system must pass through the gaps between the heddles. This arrangement does not show sufficient separation of the two warp systems in the bar-clamp section, which increases the undesired force interactions in the form of mutual contacts between the threads, which leads to a lower maximum achievable fabric quality. Another disadvantage is the need to use a separate yarn supply device for the bead system, including separate bobbins, etc.

From US 2006/144458 A1 and WO 2006/007805 A weaving machines are known which comprise needle shed devices, but these machines only allow the formation of a bead weave and do not allow the formation of a combined base and bead weave. Another disadvantage of these machines is that they do not have the separation of the warp threads of the two branches of the shed, which leads to an increased occurrence of undesired force interactions in the form of mutual contacts between the threads and to lower maximum achievable fabric quality.

The object of the invention is to enable the use of threadless weaving systems for weaving combined weaves, in particular a combination of basic and bead weaves.

The essence of inventions

The object of the invention is achieved by a weaving machine for the production of combined basic and bead weaves, the essence of which consists in that the basic sorting means are formed by needles with needles and / or half-threads, the beams being coupled to individual electronically controlled drives and guiding means of rotating warp threads. contains needles with eyelets for guiding rotating warp threads.

Preferred embodiments of the invention are the subject matter of the dependent patent claims and are described in more detail in the examples of embodiments of the invention.

Explanation of drawings

The invention is schematically illustrated in the accompanying drawings, in which Fig. 1 shows an axonometric view of two warp threads and 1 weft thread interwoven in a basic plain weave and wrapped around one bead yarn, Fig. 2 an axonometric view of means forming a combined basic and bead weave, and Figs. 3 is a sectional view of a weaving machine with an arrangement of means for producing a combination of a base and a bead weave.

Examples of embodiments of the invention

The weaving machine 20 for the production of combined basic and bead weaves comprises a warp roller 21 or several warp rolls, from which warp threads are fed in a known manner, which are divided into three or more sets 2, 3, 4. At least the first set 4 of warp threads, which forms the so-called rotating yarns, is fed via a deflection bar 18 to a rotating warp yarn guide means 13, which comprises needles 12 with eyelets for guiding the rotating yarns. The guide means 13 with the needles 12 is coupled to the drive and performs a horizontal movement in the z direction. The movement of the guide means 13 in the z direction is synchronized with the movement of the basic sorting means 15 described below realizing the movement necessary to create a shed for weft weaving and to interlace warp threads. .

The drive of the guide means 13 is preferably formed by a device called "electronic cam" among the general public. From the stitches of the needles 12 are the individual threads of the first set 4 of warp threads, i.e. rotating yarns, guided into the gaps between the reeds of the weaving beam 11, as this arrangement is described in the known solution for the production of purely beaded weaves contained in CZ PV 2003-2887.

The set 2, 3 of basic warp threads must have at least two subgroups, which are guided into the weaving means realizing the movement necessary to create a shed for weft weaving and for interconnecting the warp threads. In the case of the simplest canvas weave, the systems 2, 3 of basic warp threads are guided into the basic sorting means 15 with beams 152, 153 and fixed by flat needles 14 or half-threads. The means 15 are coupled to a movement mechanism (not shown) which, at intervals of a certain weaving cycle of the machine, e.g. 153 raises to the top dead center, in which the threads guided in it are above the level of the weft 1. Basic ties are formed by this sorting movement of the beams 152, 153 in the y-direction, in the exemplary embodiment shown in FIG. weft 1 canvas binding.

In a non-illustrated exemplary embodiment, the means 15 are formed by conventional bridle blades coupled to a drive formed by either a blade machine or a jacquard machine.

The individual yarns of each warp yarn system 2, 3 are further guided into the gaps between the reeds of the weaving beam 11, into which the individual yarns of the first warp yarn system 4 are guided, i. rotating threads.

By horizontal movement of the guide means 13 in the z direction in time synchronization with the weft insertion 1 by the weaving beam Has the bottom dead center of the warp yarn system 2, 3, each yarn from the first warp yarn system 4, i.e. each yarn of rotating yarns, is wound around the respective pair of warp yarns. from a system of 2.3 warp threads.

The movement of the basic sorting means 15 can advantageously be ensured by individual electronic motors or servomotors controlled so that the means 15 can connect the warp threads of the systems 2,3 with a binding which corresponds to the number of means 15 on the weaving machine.

Behind the weaving beam 11, the fabric formed is drawn off by a drawing device 5 with drawing rollers and is wound on a goods roll 22.

The invention is not limited to the embodiments explicitly described or illustrated herein, but is also capable of being modified to other specific embodiments within the scope of mere technical skill.

Claims (2)

PATENT CLAIMS A weaving machine for the production of combined basic and bead weave bindings, comprising a device for controlling at least three sets (2, 3, 4) of warp threads and a weaving beam (11) with lamellae, between which there are gaps for the passage of warp threads, at least two systems (2, 3, 4) of warp threads are guided into basic sorting means (15) realizing the movement necessary to create a shed for weft weaving and for interconnection of warp threads and at least one system (2, 3, 4) is through a deflection bar ( 18) guided into the guide means (13) of the rotating warp threads, characterized in that the basic sorting means (15) are formed by beams (152, 153) with needles and / or sawdust (142,143), the beams ( 152, 153) are coupled to individual electronically controlled drives and the guiding means (13) of the rotating warp threads comprises needles (12) with eyelets for guiding the rotating warp threads. Weaving machine according to claim 1, characterized in that the guide means (13) of the rotating warp threads is coupled to a drive formed by an electronic cam.