CA2029700A1 - Weaving process - Google Patents
Weaving processInfo
- Publication number
- CA2029700A1 CA2029700A1 CA 2029700 CA2029700A CA2029700A1 CA 2029700 A1 CA2029700 A1 CA 2029700A1 CA 2029700 CA2029700 CA 2029700 CA 2029700 A CA2029700 A CA 2029700A CA 2029700 A1 CA2029700 A1 CA 2029700A1
- Authority
- CA
- Canada
- Prior art keywords
- shuttle
- warp
- threads
- weft
- weaving
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Landscapes
- Looms (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
In a weaving process the weft threads are positioned into the warp of the fabric by means of at least one small shuttle. This allows the shed-forming displacement of the warp threads for the insertion of the weft thread by the forward motion of the shuttles themselves, as well as ensuring a high process rate, high product quality, and a quiet and dust-free operation. To this end, the shuttle is equipped with sensors for the detection of the warp thread position and with an arrangement for displacing the warp threads. It can thus determine its own path through the warp for the insertion of the weft in order to form the weave.
In a weaving process the weft threads are positioned into the warp of the fabric by means of at least one small shuttle. This allows the shed-forming displacement of the warp threads for the insertion of the weft thread by the forward motion of the shuttles themselves, as well as ensuring a high process rate, high product quality, and a quiet and dust-free operation. To this end, the shuttle is equipped with sensors for the detection of the warp thread position and with an arrangement for displacing the warp threads. It can thus determine its own path through the warp for the insertion of the weft in order to form the weave.
Description
2~2~7~
The invention relates to a weaving process, in which the warp threads are pulled by at least one shuttle through the warp whose threads are positioned at various angles to the wefts orientation and pulled into a shed out of the plane of motion of the shuttle.
Two types of weaving machines have been used up to this date in the textile industry. These two processes differentiate themselves from each other in the way in which the weft threads are introduced into the warp. The first type comprises projectile, pull-rod, and air machines, which all introduce the weft threads individually into the warp. The second group consists of the wave-shed or multiphase weaving machines, in which several shuttles can introduce the weft thread they carry simultaneously and in rapid succession.
The machines in the first group are characterized by a very high product quality, but they work relatively slowly, whereas the multi-phase machines are, through the simultaneous introduction of several weft threads, significantly faster, but yield a lower product quality. All weaving machines known to this date have high initial and operation costs, due to the nature of the weaving process: they have a great number of moving parts, can be very heavy, are very energy hungry, and their operation is very noisy and produces much dust. This makes them highly unsatisfactory and much in need of revision in respects of environmental protection and work conditions.
An object of the invention is therefore to provide a weaving method or process which achieves the high product quality of the first machine types described and, at the same time, the high production rate of the multi-phase machines. Further, the mass of the moving parts and the energy requirements are reduced as well as the operation noise level and the wear of material that results in dust.
According to the present invention there is provided a method of weaving in which weft threads are pulled by at least one shuttle through a warp whose threads are tensioned at various angles to the weft ori~ntation and pulled into a shed out of the plane of motion of the shuttle, the improvement wherein the shedding of the warp threads is performed by the controlled forward motion of the shuttle.
The invention also provides in a weaving apparatus comprising wherein weft threads are pulled by at least one shuttle through a warp whose tensioned at various angles to the weft orientation and pulled into a shed out of the plane of motion of the shuttle, the improvement wherein means are provided to control the forward motion of the shuttle whereby the shedding of the warp threads can be performed thereby.
The weaving process according to the invention is a radical departure from the traditional weaving processes where the shuttle plays only a passive role, in that the shuttle here plays an active role in the insertion of the weft threads through the weave shed. Whereas external elements are necessary to create the weave shed and send the weft thread through it in the current weaving machines, the ~'smart" shuttle in the process according to the invention finds its own way through the warp, and is thus an active weaving element. It opens its own shed through the warp and guides the weft threads through it. It can furthermore act as a catch thread device.
From a mechanical viewpoint, the weaving process according to the invention leads to a greatly reduced number of moving parts which make the older systems more expensive. For instance, the entire shedding machine, including the head frame, the shafts and their driving machinery, the weaving reed, and the catch thread devices, which accounts for a large portion of the machine costs, can be eliminated. Thus, eliminating these moving parts also reduces the energy requirements for the machine and 2 ~ ~ ~ ri ~ ~3 the operating noise level, through a reduction of the moving mass in the machine. At the same time, the production rate and the product quality can be raised. Also the thread is handled more carefully, with a resulting lowered production of dust.
An additional advantage is the flexibility of the weaving process according to the invention, which allows a variation of the weave patterns through a corresponding programming of the shuttle path through the warp. From the technical point of view, only two mechanical components are necessary for the realization of the weaving process according to the invention; they are the shuttle driver which pushes the shuttle through the warp; and a programmable, sensor-based control system for the guidance of the shuttle's path through the warp by the proper setting of the shuttle's tip and for the weft thread release by an appropriate configuration of the trailing point of the shuttle.
While the components acting on the warp threads and other mechanically active components of the shuttle have a defined location in the system, the weaving process according to the invention leaves a great deal of flexibility as to how the shuttle driver and sensor-based control system for the guidance of the shuttle's path through the warp can be realized and where they can be located. According to the requirements, they can be incorporated into the shuttle or installed externally, at an appropriate location on the weaving machine.
The invention will now be described in more detail, by way of example only, with reference to show schematically the principle for the movement of the shuttle through the warp, the accompanying drawings in which and in particular:
Fig. 1 shows a front view of one embodiment of a shuttle for the weaving process according to the invention, and ~,5~
Figs. 2 and 3 show the front part of the shuttle in Fig. 1 in its position within the fabric being woven, in a top and side view respectively.
The representation in Fig. 1 shows a front view of a shuttle (1) designed for the purposes of the invention as it transverses the warp. It is shown within the setting of the fabric (6), composed of the warp (4) and of the weft threads (5).
The representations of the shuttle (1) in Figs. 1 to 3 show only two significant details of the structure of the front part of the shuttle that are relevant to the invention. These are the selector point (2) and an optical sensor (3). The optical sensor (3) serves in the identification of the warp section ahead of the shuttle (1) point. The optically sensed warp thread is specially marked in the figures (4a). The selector point (2) imposes, as it moves through the warp, a pre-programmed weave shed on the warp threads (4). The specially marked warp threads (4a) are those just pulled into the shed by the shuttle (1). It should be noted that the choice of the direction in which the warp thread is pulled (4 or 4a) is determined by the shuttle's control program, which is defined by the desired weave structure.
The driver required to push the shuttle through the warp with the programmed warp thread pattern (4 or 4a, 4b) is not shown in the diagram. It can be designed in various different ways, and has only to ensure that the shuttle ~l) can execute a series of combined forward and side-motions during which the selector point (2) pulls the warp threads (4) out of the plane according to the desired weave design or structure. This series of motions is governed by the identification of the warp thread position by the optical sensor (3) on one hand, and by the control program for the formation of a predetermined weave pattern on the other. The computer control can be located in the shuttle (1) itself, in the form of a microprocessor, or it can be ~J~
installed in a different par-t of the weaving machine and transmit the weave pattern data to a receiver in the shuttle (1).
The shuttle driver can be located within the shuttle (1) and be powered by an integrated, autonomous power supply, but it can also be designed as an external driver hooked into a network power supply. Besides its role of guiding the movement of the shuttle (1) according to a predetermined program, the optical sensor (3) can also serve the purpose of identlfying flaws in the weave, such as broken warp threads (4), thus allowing the control processor acting on this information to change the program of the other shuttles and/or of the weaving machine as a whole. For example the motion of the shuttle could be interrupted, should a broken warp thread be detected. This offers a fast and flexible means for the identification and removal of possible flaws in the weave. In this context, the optical sensor could also be replaced by an electrical or a magnetic sensor with the same functions, for the purpose of identifying the warp thread position.
Through an appropriate design of its trailing point, the shuttle (1) can also be used as a weaving reed, for the picking of the weft thread t5) in the fabric.
The description given above, in con~unction with the figures, shows that the invention offers a possibility to use the shuttle as an active element for the insertion of the weft thread into the warp. In the process, the shuttle can replace the shedding machine, the weaving reed, and the catch thread device, and thus save the costs of these otherwise necessary components.
The weaving process according to the invention is thus an economical, fast, and rellable method for the production of high quality fabrics and weaves. A dust-free operation with low operating noise levels furthermore makes this an environmentally attractive process. Finally, the weaving process according to the invention, works wit5h a shuttle that weaves by "finding its 2 ~
own way" through the warp by means of a sensor-based identification of the warp thread position and control means to create the shed through whi~h it pulls and in which it sets the weft threads.
The invention relates to a weaving process, in which the warp threads are pulled by at least one shuttle through the warp whose threads are positioned at various angles to the wefts orientation and pulled into a shed out of the plane of motion of the shuttle.
Two types of weaving machines have been used up to this date in the textile industry. These two processes differentiate themselves from each other in the way in which the weft threads are introduced into the warp. The first type comprises projectile, pull-rod, and air machines, which all introduce the weft threads individually into the warp. The second group consists of the wave-shed or multiphase weaving machines, in which several shuttles can introduce the weft thread they carry simultaneously and in rapid succession.
The machines in the first group are characterized by a very high product quality, but they work relatively slowly, whereas the multi-phase machines are, through the simultaneous introduction of several weft threads, significantly faster, but yield a lower product quality. All weaving machines known to this date have high initial and operation costs, due to the nature of the weaving process: they have a great number of moving parts, can be very heavy, are very energy hungry, and their operation is very noisy and produces much dust. This makes them highly unsatisfactory and much in need of revision in respects of environmental protection and work conditions.
An object of the invention is therefore to provide a weaving method or process which achieves the high product quality of the first machine types described and, at the same time, the high production rate of the multi-phase machines. Further, the mass of the moving parts and the energy requirements are reduced as well as the operation noise level and the wear of material that results in dust.
According to the present invention there is provided a method of weaving in which weft threads are pulled by at least one shuttle through a warp whose threads are tensioned at various angles to the weft ori~ntation and pulled into a shed out of the plane of motion of the shuttle, the improvement wherein the shedding of the warp threads is performed by the controlled forward motion of the shuttle.
The invention also provides in a weaving apparatus comprising wherein weft threads are pulled by at least one shuttle through a warp whose tensioned at various angles to the weft orientation and pulled into a shed out of the plane of motion of the shuttle, the improvement wherein means are provided to control the forward motion of the shuttle whereby the shedding of the warp threads can be performed thereby.
The weaving process according to the invention is a radical departure from the traditional weaving processes where the shuttle plays only a passive role, in that the shuttle here plays an active role in the insertion of the weft threads through the weave shed. Whereas external elements are necessary to create the weave shed and send the weft thread through it in the current weaving machines, the ~'smart" shuttle in the process according to the invention finds its own way through the warp, and is thus an active weaving element. It opens its own shed through the warp and guides the weft threads through it. It can furthermore act as a catch thread device.
From a mechanical viewpoint, the weaving process according to the invention leads to a greatly reduced number of moving parts which make the older systems more expensive. For instance, the entire shedding machine, including the head frame, the shafts and their driving machinery, the weaving reed, and the catch thread devices, which accounts for a large portion of the machine costs, can be eliminated. Thus, eliminating these moving parts also reduces the energy requirements for the machine and 2 ~ ~ ~ ri ~ ~3 the operating noise level, through a reduction of the moving mass in the machine. At the same time, the production rate and the product quality can be raised. Also the thread is handled more carefully, with a resulting lowered production of dust.
An additional advantage is the flexibility of the weaving process according to the invention, which allows a variation of the weave patterns through a corresponding programming of the shuttle path through the warp. From the technical point of view, only two mechanical components are necessary for the realization of the weaving process according to the invention; they are the shuttle driver which pushes the shuttle through the warp; and a programmable, sensor-based control system for the guidance of the shuttle's path through the warp by the proper setting of the shuttle's tip and for the weft thread release by an appropriate configuration of the trailing point of the shuttle.
While the components acting on the warp threads and other mechanically active components of the shuttle have a defined location in the system, the weaving process according to the invention leaves a great deal of flexibility as to how the shuttle driver and sensor-based control system for the guidance of the shuttle's path through the warp can be realized and where they can be located. According to the requirements, they can be incorporated into the shuttle or installed externally, at an appropriate location on the weaving machine.
The invention will now be described in more detail, by way of example only, with reference to show schematically the principle for the movement of the shuttle through the warp, the accompanying drawings in which and in particular:
Fig. 1 shows a front view of one embodiment of a shuttle for the weaving process according to the invention, and ~,5~
Figs. 2 and 3 show the front part of the shuttle in Fig. 1 in its position within the fabric being woven, in a top and side view respectively.
The representation in Fig. 1 shows a front view of a shuttle (1) designed for the purposes of the invention as it transverses the warp. It is shown within the setting of the fabric (6), composed of the warp (4) and of the weft threads (5).
The representations of the shuttle (1) in Figs. 1 to 3 show only two significant details of the structure of the front part of the shuttle that are relevant to the invention. These are the selector point (2) and an optical sensor (3). The optical sensor (3) serves in the identification of the warp section ahead of the shuttle (1) point. The optically sensed warp thread is specially marked in the figures (4a). The selector point (2) imposes, as it moves through the warp, a pre-programmed weave shed on the warp threads (4). The specially marked warp threads (4a) are those just pulled into the shed by the shuttle (1). It should be noted that the choice of the direction in which the warp thread is pulled (4 or 4a) is determined by the shuttle's control program, which is defined by the desired weave structure.
The driver required to push the shuttle through the warp with the programmed warp thread pattern (4 or 4a, 4b) is not shown in the diagram. It can be designed in various different ways, and has only to ensure that the shuttle ~l) can execute a series of combined forward and side-motions during which the selector point (2) pulls the warp threads (4) out of the plane according to the desired weave design or structure. This series of motions is governed by the identification of the warp thread position by the optical sensor (3) on one hand, and by the control program for the formation of a predetermined weave pattern on the other. The computer control can be located in the shuttle (1) itself, in the form of a microprocessor, or it can be ~J~
installed in a different par-t of the weaving machine and transmit the weave pattern data to a receiver in the shuttle (1).
The shuttle driver can be located within the shuttle (1) and be powered by an integrated, autonomous power supply, but it can also be designed as an external driver hooked into a network power supply. Besides its role of guiding the movement of the shuttle (1) according to a predetermined program, the optical sensor (3) can also serve the purpose of identlfying flaws in the weave, such as broken warp threads (4), thus allowing the control processor acting on this information to change the program of the other shuttles and/or of the weaving machine as a whole. For example the motion of the shuttle could be interrupted, should a broken warp thread be detected. This offers a fast and flexible means for the identification and removal of possible flaws in the weave. In this context, the optical sensor could also be replaced by an electrical or a magnetic sensor with the same functions, for the purpose of identifying the warp thread position.
Through an appropriate design of its trailing point, the shuttle (1) can also be used as a weaving reed, for the picking of the weft thread t5) in the fabric.
The description given above, in con~unction with the figures, shows that the invention offers a possibility to use the shuttle as an active element for the insertion of the weft thread into the warp. In the process, the shuttle can replace the shedding machine, the weaving reed, and the catch thread device, and thus save the costs of these otherwise necessary components.
The weaving process according to the invention is thus an economical, fast, and rellable method for the production of high quality fabrics and weaves. A dust-free operation with low operating noise levels furthermore makes this an environmentally attractive process. Finally, the weaving process according to the invention, works wit5h a shuttle that weaves by "finding its 2 ~
own way" through the warp by means of a sensor-based identification of the warp thread position and control means to create the shed through whi~h it pulls and in which it sets the weft threads.
Claims (8)
1. A method of weaving in which weft threads are pulled by at least one shuttle through a warp whose threads are tensioned at various angles to the weft orientation and pulled into a shed out of the plane of motion of the shuttle, the improvement wherein the shedding of the warp threads is performed by the controlled forward motion of the shuttle.
2. A method as claimed in claim 1, wherein the shedding of the warp is performed by the shuttle itself.
3. A method as claimed in claim 1, wherein the shuttle movement is controlled by a sensor-based identification of the warp thread position ahead of the shuttle and by a predetermined, programmed weave pattern.
4. A method as claimed in any one of claims 1 to 3, wherein the shuttle imparts a compacting action on the weft threads right after their positioning in the warp.
5. A method as claimed in any one of claims 1 to 3, wherein the shuttle motion is interrupted immediately upon the registration of a discrepancy between the programmed and the actual warp thread position as identified by the shuttle.
6. In a weaving apparatus comprising wherein weft threads are pulled by at least one shuttle through a warp whose tensioned at various angles to the weft orientation and pulled into a shed out of the plane of motion of the shuttle, the improvement wherein means are provided to control the forward motion of the shuttle whereby the shedding of the warp threads can be performed thereby.
7. A weaving apparatus as claimed in claim 6, wherein the shuttle further comprises sensor means for determining the position of the warp thread ahead of the shuttle and means for displacing the warp thread whereby the shuttle can determine its own path through the warp threads.
8. A weaving apparatus as claimed in claim 7, wherein the means for displacing the warp thread comprises a selector point on the shuttle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2029700 CA2029700A1 (en) | 1990-11-09 | 1990-11-09 | Weaving process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2029700 CA2029700A1 (en) | 1990-11-09 | 1990-11-09 | Weaving process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2029700A1 true CA2029700A1 (en) | 1992-05-10 |
Family
ID=4146387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2029700 Abandoned CA2029700A1 (en) | 1990-11-09 | 1990-11-09 | Weaving process |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2029700A1 (en) |
-
1990
- 1990-11-09 CA CA 2029700 patent/CA2029700A1/en not_active Abandoned
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |