EP3374545A1 - Suction device for spinning machines - Google Patents
Suction device for spinning machinesInfo
- Publication number
- EP3374545A1 EP3374545A1 EP15832896.3A EP15832896A EP3374545A1 EP 3374545 A1 EP3374545 A1 EP 3374545A1 EP 15832896 A EP15832896 A EP 15832896A EP 3374545 A1 EP3374545 A1 EP 3374545A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- suction
- actuator
- control element
- spinning machine
- suction control
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
- B65H63/02—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material
- B65H63/024—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials
- B65H63/036—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the combination of the detecting or sensing elements with other devices, e.g. stopping devices for material advancing or winding mechanism
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H54/00—Winding, coiling, or depositing filamentary material
- B65H54/70—Other constructional features of yarn-winding machines
- B65H54/707—Suction generating system
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H13/00—Other common constructional features, details or accessories
- D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
- D01H13/16—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material
- D01H13/1691—Thread breakage detector means associated with pneumatic cleaning devices, e.g. suction of broken end of yarn
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
- D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
- D01H5/60—Arrangements maintaining drafting elements free of fibre accumulations
- D01H5/66—Suction devices exclusively
- D01H5/68—Suction end-catchers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/31—Textiles threads or artificial strands of filaments
Definitions
- the present invention concerns the field of spinning machines, for example the field of ring spinning machines, and concerns a spinning machine comprising an improved suction system, capable of drawing in broken yarn in an advantageous manner.
- the present invention concerns a suction system for spinning machines that is capable of varying its suction power according to the need, in such a way as to guarantee an effective suction action when required while at the same time reducing the drawbacks caused by suction when a suction action is not necessary.
- FIG 1A schematically shows a side sectional view of a spinning machine 1000 according to the state of the art.
- the spinning machine 1000 comprises a supporting structure 1 100 that provides a structural support to one or more of the components of the spinning machine 1000 that are described below.
- the supporting structure 1 100 serves the function of a housing or frame for the spinning machine 1000.
- the spinning machine 1000 comprises at least two pairs of rollers 1201, 1202 and 1203, 1204, respectively.
- Figure 1A shows three pairs of rollers 1201 and 1202, 1203 and 1204, 1205 and 1206, as this at least one first roller is motor driven, while the second roller is driven and set moving by the first roller.
- the first roller 1201 can be motor driven so that it moves in the direction indicated by the arrow located inside it, while the second roller 1202 is driven by the friction generated through contact with the first roller 1201. Even if this is not illustrated, the rollers 1201-1206, as well as the respective motors (not illustrated) and/ is the most commonly adopted solution. In each pair of rollers 1201-1206 or means for transmitting motion from the motors to the rollers (not illustrated), can be supported by the supporting structure 1 100.
- the pairs of rollers 1201 and 1202, 1203 and 1204, 1205 and 1206 constitute a spinning point 1200.
- the spinning point 1200 serves the function of spinning a first textile element 1301, thus obtaining a second textile element 1302.
- the first textile element 1301 can be, for example, a set of fibres called stubbing.
- the first textile element 1301 can originate from a first collection element 1303 that, for example, can be constituted by a reel on which it is wound.
- at least two of the pairs of rollers 1201 and 1202, 1203 and 1204, 1205 and 1206 rotate at different speeds.
- the pair of rollers 1205 and 1206 can rotate at a higher speed than the pair of rollers 1203 and 1204.
- the first textile element 1301 Due to the difference in the rotation speeds of the pairs of rollers, the first textile element 1301 is stretched and then, when leaving the rollers, it is twisted so that it winds on itself and becomes stronger and more resistant, and then it is wound on the second collection element 1304.
- the first textile element 1301 becomes a second textile element 1302 that is thinner and/or stronger than the first textile element 1301.
- the second textile element 1302 can be, for example, a thread or yarn.
- the second textile element 1302 can be collected by a second collection element 1304 that, for example, can be a coil or a spindle.
- the spinning machine may contain, and generally contains, a plurality of spinning points 1200. Spinning machines with hundreds or more than a thousand spinning points are common. In these cases, each spinning point 1200 is associated with a first collection element 1303 and a second collection element 1304. For the sake of clarity, in the description of the present invention reference is made to only one spinning point 1200.
- the textile element 1301, 1302 may tear up, especially at the level of the pair of rollers 1205-1206.
- the portion of the textile element 1301, 1302 before the tear continues to be driven downwards by the rollers, with the risk of being wound around one or more of the rollers 1201-1206 and of damaging the rollers themselves and/or creating windings that need to be eliminated and make it necessary to restore the spinning point 1200 to the correct operating conditions, both of which are time-demanding operations.
- a suction device for each spinning point 1200, said suction device comprising a suction element 1402 connected to a suction opening 1401, located in proximity to the textile element 1301, 1302, through a suction pipe 1403.
- the suction element 1402 can be an extraction unit, a pump or any means capable of generating a negative pressure in the suction pipe 1403, which in turn creates an air flow towards the inside of the suction opening 1401. This air flow makes it possible to draw in the textile element 1301, 1302 before the tear, in such a way as to avoid the problems described above, as schematically shown in Figure IB.
- the overall suction effect produced by the sum of the individual suction actions performed for each one of the spindles requires a considerable quantity of energy.
- electric power in the order of 10 kW is required to ensure sufficient suction to each spinning point 1200.
- suction may be different at the various suction openings 1401 and this does not guarantee that the textile elements 1301, 1302 are drawn in after being torn.
- Inadequate suction may cause a blockage in the suction pipes 1403 and the suction openings 1401.
- the patent EP 2233618 discloses a spinning machine comprising a suction system provided with a movable limiting device, usually placed in front of the suction opening. This makes it possible to partially reduce the suction power needed, as the limiting device reduces the flow of air drawn in and thus consumption by the suction system. Nevertheless, considerable suction power must in any case be guaranteed, because, as can be observed in Figure 2b, it is necessary to ensure that, in the presence of the limiting device, the residual suction action is sufficient to draw in a small thread. Furthermore, the residual suction action must also be sufficient to start drawing in a bigger thread, as can be seen in Figures 2c and 2d.
- the present invention is based on the general concept that the spinning machine 1000 does not need a constant suction action at the level of the opening 1401. On the contrary, it is sufficient to provide a suction action at the level of the opening 1401 at the moment when the first or the second textile element 1301, 1302 tears up. Since the tearing of the textile element 1301, 1302 is a relatively infrequent event, it is possible to avoid providing a constant suction action at the suction opening 1401 for most of the time, on condition that it is possible to guarantee a suction action at the level of the suction opening 1401 in the presence of a tear.
- An embodiment of the present invention concerns a spinning machine for spinning a textile element, comprising: at least one spinning point for spinning the textile element; a suction device comprising a suction element, a suction opening in proximity to the textile element and a suction pipe suited to connect the suction element to the suction opening; a suction control element suited to be set at least in an open configuration and in a closed configuration, wherein in the open configuration the suction control element allows the suction element to draw in from the suction opening and in the closed configuration the suction control element prevents the suction element from drawing in from the suction opening; and an actuator suited to activate the suction control element, configured in such a way as to set the suction control element in the open configuration in the presence of at least one tear in the textile element and to set the suction control element in the closed configuration when there are no tears in the textile element.
- An embodiment of the present invention furthermore concerns a suction device for a spinning machine suited to spin a textile element which may comprise a suction opening suited to be positioned in proximity to the textile element and a suction control element suited to be set at least in an open configuration and in a closed configuration, and an actuator suited to operate the suction control element, configured in such a way as to set the suction control element in the open configuration in the presence of at least one tear in the textile element and to set the suction control element in the closed configuration when there are no tears in the textile element.
- the suction control element in the closed configuration can completely stop the suction element from drawing in through the suction opening, or the suction control element in the closed configuration can form an opening that allows only a reduced suction action to be performed. Thanks to such an embodiment, the reduction of power consumption by the suction system is further improved. Furthermore, it is possible to provide a powerful suction action only in the presence of a tear, thus ensuring that the textile element with the tear is drawn in.
- the suction control element can be connected along the suction pipe between the suction element and the suction opening and/or the suction control element can be a valve, preferably a butterfly valve, or a ball valve, or a gate valve.
- the suction control element preferably a potentiometer, is able to control a suction power of the suction element.
- the actuator that activates the suction control element can be a mechanical actuator.
- the actuator may comprise a feeler and when there are no tears in the textile element the feeler can be maintained against the textile element, thus preventing the actuator from moving.
- the actuator can be made in a simple and reliable manner.
- the feeler can be maintained against the textile element by a force generated by the weight of the actuator and/or by a force generated by the weight of the suction control element. Thanks to such an embodiment, it is possible to ensure that the actuator works in a simple and reliable manner in case of tears in the textile element, with no need for external power.
- the suction control element may be constructed asymmetrically, in such a way as to generate a force that results in a rotation of the actuator. Thanks to such an embodiment, it is possible to guarantee the movement of the actuator at the moment when a tear is produced.
- the feeler can be positioned on the opposite side of the textile element with respect to the suction opening.
- the actuator may comprise at least one adjustable stop element intended to limit the movement of the actuator within a predetermined region.
- the spinning machine or the suction device can furthermore comprise a sensor intended to monitor the presence of the textile element and/or the actuator can be an electromechanical actuator, preferably an electromagnet controlled by the sensor.
- the spinning machine or the suction device can furthermore comprise a second sensor intended to monitor the presence of the textile element, preferably positioned between the spinning point and the suction opening, and/or wherein the actuator in order to activate the suction control element can be configured in such a way as to set the suction control element in the closed configuration in response to the signal emitted by the second sensor.
- the suction device can furthermore comprise at least one suction hole positioned upstream of the suction control element.
- the spinning machine or the suction device can furthermore comprise a warning light, wherein the warning light can be configured in such a way that it lights up when the suction control element is set in the substantially open configuration.
- An embodiment of the present invention can furthermore concern a spinning machine comprising at least one spinning point for spinning a textile element and a suction device according to any of the previous embodiments.
- the spinning machine can furthermore comprise a cutting element suited to cut the textile element and an actuator suited to operate the cutting element.
- the actuator that activates the cutting element can be operated by the actuator that activates the suction control element, or the actuator that activates the cutting element and the actuator that activates the suction control element can be a single actuator.
- the actuator that activates the cutting element can be an electromechanical actuator, preferably an electromagnet, controlled by the sensor.
- the actuator that activates the suction control element can be configured in such a way as to set the suction control element in the closed configuration after a predetermined time interval from the activation of the cutting element by the respective actuator.
- FIG. 1A schematically shows a side sectional view of a spinning machine and a corresponding suction device according to the state of the art
- FIG. 1B schematically shows the operation of the spinning machine and of the corresponding suction device shown in Figure 1A;
- FIG. 2A schematically shows a side sectional view of a spinning machine and a corresponding suction device according to a first embodiment of the present invention
- FIG. 2B and 2C schematically show an enlarged view and the operation of a part of the embodiment shown in Figure 2A;
- FIG. 3A schematically shows a side sectional view of a spinning machine and a corresponding suction device according to a second embodiment of the present invention
- FIG. 4A schematically shows a side sectional view of elements of a spinning machine and of a corresponding suction device according to a third embodiment of the present invention
- Figures 4B and 4C schematically show a front view and a top view, respectively, of the embodiment shown in Figure 4A;
- FIG. 5A schematically shows a side sectional view of elements of a spinning machine and of a corresponding suction device according to a fourth embodiment of the present invention
- Figures 5B and 5C schematically show a front view and a top view, respectively, of the embodiment shown in Figure 5A;
- Figure 5D schematically shows a variant of the embodiment shown in Figure 5A;
- FIG. 6A schematically shows a side sectional view of elements of a spinning machine and of a corresponding suction device according to a fifth embodiment of the present invention
- FIG. 6B and 6C schematically show a front view and a top view, respectively, of the embodiment shown in Figure 6 A;
- - Figure 6D schematically shows the operation of the embodiment shown in Figure 6A;
- FIG. 7 A schematically shows a side sectional view of a spinning machine and of a corresponding suction device according to a sixth embodiment of the present invention
- Figures 7B and 7C schematically show an enlarged view and the operation of a part of the embodiment shown in Figure 7A;
- FIG. 8A and 8B schematically show a side sectional view of parts of a spinning machine and of a corresponding suction device according to a seventh embodiment of the present invention
- FIG. 9A schematically shows a side sectional view of a spinning machine and of a corresponding suction device according to an eighth embodiment of the present invention.
- FIG. 10A schematically shows a side sectional view of a spinning machine and of a corresponding suction device according to a ninth embodiment of the present invention
- FIG. 1 1 A and 1 IB schematically show two side sectional views of elements of a spinning machine and of a corresponding suction device according to a tenth embodiment of the present invention
- FIG. 12A and 12B schematically show two side sectional views of elements of a spinning machine and of a corresponding suction device according to an eleventh embodiment of the present invention.
- Figure 2A schematically shows a side sectional view of a spinning machine 2000 and of a corresponding suction device according to a first embodiment of the present invention.
- the spinning machine 2000 differs from the known spinning machine 1000 thanks to the presence of a suction control element 2404.
- the suction control element 2404 can be made in any way suited to partially or completely reduce suction at the opening 1401 of the suction pipe 1403.
- the suction control element 2404 is preferably a butterfly valve, however the present invention is not limited to this solution, as can be seen here below.
- such an embodiment makes it possible to regulate the suction power at the opening 1401 in a controlled manner.
- the suction control element 2404 partially or completely limits the suction power at the opening 1401.
- the valve is partially or completely closed, as shown in Figure 2C. Thanks to the closed configuration, the power necessary to maintain a negative pressure inside the suction pipe is reduced. In other words, the power consumed by the suction element 1402 is reduced thanks to the presence of the suction control element 2404.
- the suction control element 2404 When a tear is produced, the suction control element 2404 is activated in such a way as to increase the suction action at the opening 1401, preferably to the maximum level. In other words, the suction control element 2404 is partially or completely opened, as shown in Figure 2B.
- a spinning machine 2000 for spinning a textile element 1301, 1302 comprising: a spinning point 1200 for spinning the textile element; a suction device 1401, 1402, 1403 comprising the suction element 1402, the suction opening 1401 in proximity to the textile element 1301, 1302, and the suction pipe 1403 suited to connect the suction element 1402 to the suction opening 1401; a suction control element 2404 suited to be set at least in an open configuration and in a closed configuration, wherein in the open configuration the suction control element 2404 allows the suction element 1402 to draw through the suction opening 1401 and in the closed configuration the suction control element 2404 prevents the suction element 1402 from drawing in through the suction opening 1401 ; and an actuator 2405 suited to operate the suction control element 2404, configured in such a way as to set the suction control element in the open configuration in the presence of at least one tear in the textile element and to set the suction control element 2404 in the closed configuration when there are no tears in the textile
- open configuration can mean both a completely open configuration, as shown in Figure 2B, and a partially open configuration.
- closed configuration can mean both a completely closed configuration, as shown in Figure 2C, and a partially closed configuration.
- the closed configuration not to be completely closed, due to tolerances generated during the production of the suction control element 2404, which in any case allow a minimum quantity of air to flow in even in the configuration defined as completely closed.
- the present invention makes it possible to ascertain the presence or the absence of a tear in the textile element 1301, 1302 are described here below.
- the present invention can be implemented through any method that makes it possible to ascertain the presence of a tear and to consequently regulate the actuator 2405 of the suction control element 2404 in such a way as to reduce suction, preferably to zero, at the opening 1401 when no tears are present, and to increase, preferably to the maximum possible value, the suction power at the opening 1401 in the presence of a tear.
- the opening 1401 may be located downstream of the last pair of rollers 1205, 1206, the present invention is not limited to this configuration.
- the opening 1401 may be located in a lower or higher position.
- the opening 1401 may be located at the level of the last pair of rollers 1205, 1206, or between the pair of rollers 1205, 1206 and the pair of rollers 1203, 1204, as schematically shown in Figure 9A. More generally, the opening 1401 may be located in any position that allows the textile element with the tear to be drawn, so as to prevent the textile element 1301, 1302 from being wound on one or more rollers 1201-1206.
- the opening 1401 is located downstream of the last pair of rollers 1205, 1206 in such a way as to draw in the textile element with the tear and prevent the textile element 1301, 1302 from being wound on one or more rollers 1201-1206.
- the suction control element 2404 is located on the suction pipe 1403, in proximity to the opening 1401.
- This configuration offers the advantage that at the moment when the suction control element 2404 is operated in order to increase the suction power at the opening 1401, the power increase takes place very quickly, preferably immediately, as the portion of the suction pipe 1403 between the suction control element 2404 and the opening 1401 is limited.
- the present invention is not limited to this case and the suction control element 2404 may be positioned on any point of the suction pipe 1403.
- this embodiment makes it possible to obtain a spinning machine 2000, in which in the closed configuration the suction control element 2404 partially or completely prevents the suction element 1402 from drawing through the suction opening 1401.
- the suction control element 2404 is obtained through a butterfly valve and a rotary actuator 2405.
- the present invention is not limited to this configuration and other types of valve, for example a ball valve, or a gate valve, or other known types of valve, can be used.
- the present embodiment makes it possible to maintain, at a given instant, most of the suction closing elements 2404 provided on the various spindles of the spinning machine 2000 in a partially or completely closed configuration, in such a way as to partially or completely reduce the suction action at the openings 1401 corresponding to the various spinning points 1200.
- the openings 1401 corresponding to the spinning points 1200 where a tear has been produced will benefit from a suitable suction action so as to recover the broken part of the textile element, thanks to the proper operation of the suction control element 2404.
- a spinning machine 2000 having, for example, hundreds of spinning points 1200, at a given instant only part of the spinning points 1200 will have a tear and will consequently be provided with suitable suction power for drawing the torn textile element, if necessary with the maximum suction power. This makes it possible to limit the power consumption of the suction element 1402.
- the suction elements 1402 of the spinning points where there are no tears will consume less power, thanks to the fact that the suction control element 2404 is partially or completely closed.
- the single suction element 1402 in the case where a single suction element 1402 is provided for all of the spinning points 1200, for example through a connection to a plurality of suction pipes 1403, the single suction element 1402 will consume less power as, at least in part of the spinning points 1200, the suction control element 2404 limits the suction action in the respective spinning point, and consequently limits the respective power consumption.
- the single suction element 1402 in the case where a single suction element 1402 is used for the plurality of spinning points, considering that statistically only part of the spinning points 1200 will have a tear, the single suction element 1402 can be sized in such a way as to provide enough suction power to produce a suction action on a smaller number of spinning points compared to the total number of spinning points installed on the spinning machine, thus reducing the energy costs, the overall dimensions and the noisiness of the suction element 1402. For example, if statistically only 5% of the spinning points has a tear at every instant, the single suction element 1402 can be sized in such a way as to provide enough suction power for 5%-10% of the total spinning points.
- the operation of the suction control element 2404 can be compatible with a wide range of suction pressure values. This is due to the fact that the suction pressure is not included in the parameters that affect the operation of the actuator 2405 and of the suction control element 2404. In other words, the operation of the suction control element 2404 is controlled based on the presence or absence of a tear, independently of the value of the suction pressure inside the respective suction pipe 1403.
- Figure 3 A schematically shows a side sectional view of a spinning machine 3000 and of a corresponding suction device according to a second embodiment of the present invention.
- the spinning machine 3000 differs from the spinning machine 2000 in that the suction control element 2404 is replaced by a suction control element 3404.
- the suction control element 3404 preferably a potentiometer, is configured in such a way as to control, preferably electrically, the suction power of the suction element 1402.
- This solution for example, can be advantageously adopted in the case where each spinning point 1200 has its own independent suction element 1402 connected to a single suction pipe 1403. In this case, it is possible to partially or completely reduce the activity of the suction element 1402 when no tears are detected in the textile element.
- a tear is detected in the textile element, it is possible to partially increase the suction power or even to increase it up to the maximum value allowed by the suction element 1402.
- suction control element 3404 has been described as a potentiometer connected to the power supply of the suction element 1402, the present invention is not limited to this embodiment.
- other methods for controlling the power of the suction element 1402 can be implemented, such as, for example, voltage control, or control through a PWM controller, or similar electronic controls suited to control the power supplied to the suction element 1402.
- a suction control element 3404 may be associated with each suction element 1402 present in the spinning machine and it may be operated by a sum or combination of the values obtained from the actuators corresponding to each individual spinning point 1200.
- Figure 4A schematically shows a side sectional view of elements of a spinning machine 4000 and of a corresponding suction device according to a third embodiment of the present invention.
- Figures 4B and C schematically show a front view and a top view, respectively, of the embodiment illustrated in Figure 4A.
- Figure 4D schematically shows the operation of the embodiment illustrated in Figure 4A.
- the spinning machine 4000 is based on the spinning machine 2000 and differs from the latter exactly in the execution of the actuator 2405, which is shown only schematically in the spinning machine 2000 and is the actuator 4405 in the spinning machine 4000.
- the actuator 4405 is a mechanical actuator, mechanically connected to the suction control element 2404. Consequently, a movement of the actuator 4405 will cause a movement of the suction control element 2404.
- the actuator 4405 comprises four elements 4405A, 4405B, 4405C and 4405D.
- the element 4405A is a rotation axis for the actuator 4405 and for the suction control element 2404.
- the rotation axis 4405 A penetrates inside the suction pipe 1403 in such a way as to allow the suction control element 2404 and the actuator 4405 to be integrally connected to each other.
- the elements 4405B and 4405C are extension arms that allow the rotation axis 4405A to be connected to the element 4405D.
- the shape of the extension arms is not limited to that illustrated in the figure, but alternatively other shapes allowing the operation of the actuator 4405 can be implemented, as described below.
- a single, curved or linear extension arm may be provided between the elements 4405A and 4405D.
- the element 4405D is a feeler. When the textile element 1301, 1302 is continuous, meaning with no tears, as shown in Figures 4A, 4B and 4C, the feeler 4405D is maintained in the position illustrated in the three figures by the second textile element 1302.
- the feeler 4405D tends to move downwards, following an angular movement caused by the rotation axis 4405A.
- the feeler 4405D cannot move in this direction and remains locked in the position illustrated in Figures 4A, 4B and 4C.
- the feeler 4405D thus maintains the actuator 4405 in the illustrated position, which results in the closure of the suction control element 2404, as shown in Figure 4A. Even if it is represented in a completely closed configuration, the suction control element may be maintained in a partially closed configuration. As long as the textile element 1301, 1302 is continuous, the power required to create a negative pressure inside the suction pipe 1403 is thus limited, preferably considerably reduced thanks to the partial or, as shown, complete limitation of the suction action obtained by means of the suction control element 2404.
- the feeler 4405D is no longer maintained in position by the textile element, as shown in Figure 4A. Being moved downwards by the weight of the feeler 4405D and/or by the weight of the actuator 4405, and/or by the weight of the suction control element 2404, possibly asymmetrical, the actuator 4405 performs a clockwise rotation that results in the partial or complete opening of the suction control element 2404, as shown in Figure 4D.
- the suction control element 2404 allows the connection between the inside of the suction pipe 1403 and the opening 1401. Thanks to the movement of the suction control element 2404, the torn textile element is drawn into the suction pipe 1403, as illustrated.
- the suction control element 2404 may be made in an asymmetrical manner in order to cause a rotation moment of the actuator.
- the half of the valve in the upper position in Figure 4 A could be constructed so that it is heavier than the half of the valve in the lower position in Figure 4A.
- This solution offers the advantage that the actuator does not need to be constructed with such a weight as to be able, alone, to operate the valve or, more generally, the suction control element 2404.
- the actuator 4405 has been described as having a specific shape, the present invention should not be considered as limited to the described shape. More generally, it is possible to use any shape of the actuator that, in combination with the shape of the suction control element 2404, generates an angular or linear moment: an angular moment in the case of a suction control element 2404 with angular movement, such as a butterfly valve, or a linear moment in the case of a suction control element 2404 with linear movement, such as a gate valve.
- the actuator 4405 of the embodiment illustrated has been described in combination with a suction control element 2404 corresponding to a butterfly valve, the present invention is not limited to this solution. As an alternative, the actuator 4405 can be combined with any form of suction control element 2404 described in the present invention.
- the actuator 4405 can be combined with any form of the suction control element 3404 previously described.
- the actuator can act on a mechanical portion of the suction control element 3404, for example a mechanical control suited to regulate a potentiometer or a PWM controller.
- the actuator 4405 can furthermore act on a potentiometer or any other element that makes it possible to convert a mechanical signal into an electronic signal, and the resulting electronic signal can be used to control the suction control element 3404.
- the actuator 4405 is advantageous as it positions the feeler on the side of the textile element 1301, 1302 opposite the opening 1401. This position is advantageous, as the feeler 4405D cannot be accidentally pushed downwards by the movement of the textile element, causing the undesired opening of the suction control element 2404.
- the feeler 4405D is on the side of the textile element corresponding to the side of the opening 1401, the movement of the textile element may cause the feeler to be pushed downwards, causing the undesired opening of the suction control element 2404.
- FIG. 5A schematically shows a side sectional view of elements of a spinning machine 5000 and of a corresponding suction device according to a fourth embodiment of the present invention, analogously to that which is shown in Figure 4A.
- Figures 5B and 5C schematically show a front view and a top view, respectively, of the embodiment of Figure 5A, analogously to that which is shown in Figures 4B and 5B.
- the spinning machine 5000 is based on the spinning machine 4000 and differs from the latter due to the presence of the actuator 5405 that replaces the actuator 4405.
- the actuator 5405 differs from the actuator 4405 in that the extension arms 4405B, 4405C are not present on both sides of the actuator 5405, differently from the actuator 4405.
- the extension arms are present on one side only, on the left in Figure 5B and at the bottom in Figure 5C.
- the shape of the actuator makes it possible to position the textile element with respect to the feeler 4405D at any moment.
- the advantage offered by the actuator 4405 compared to the actuator 5404 lies in that, even in the presence of considerable movements of the textile element 1301, 1302, the textile element cannot move out of the area delimited by the elements 4405B, 4405C and 4405D. Nevertheless, in the actuator 4405 this possible drawback can be mitigated by designing the feeler 4405D in a suitable shape. For example, a particularly long feeler 4405D reduces the risk of the textile element moving from behind the feeler 4405D. Alternatively, as shown in Figure 5D, a feeler 5405D in the shape of a U open on the side of the element 4405C reduces in a similar manner the risk of the textile element moving from its seat with respect to the feeler 4405D illustrated in Figure 5C.
- the actuator 5405 can be used both with the suction control element 2404 and with the suction control element 3404.
- Figure 6A schematically shows a side sectional view of elements of a spinning machine 6000 and of a respective suction device according to a fifth embodiment of the present invention, analogously to that which is shown in Figure 4A.
- Figures 6B and 6C schematically show a front view and a top view, respectively, of the embodiment shown in Figure 6A, analogously to that which is shown in Figures 4B and 4C.
- Figure 6D schematically shows the operation of the embodiment of Figure 6A, analogously to that which is shown in Figure 4D.
- the spinning machine 6000 is based on the spinning machine 4000, from which it differs as the actuator 4405 is replaced by the actuator 6405.
- the actuator 6405 corresponds to the actuator 4405, to which at least one adjustable stop element 6501 and 6502 is added.
- the stop element 6502 prevents the actuator 6405 from moving further in the anticlockwise direction with respect to the stop position illustrated in Figure 6A, while the stop element 6501 prevents the actuator 6405 from moving further in the clockwise direction with respect to the stop position illustrated in Figure 6D.
- the two stop elements 6501 and 6502 illustrated depend on the specific shape of the actuator, and that different stop elements are possible in the case of a different embodiment, for example, of the extension arms 4405B and 4405C.
- the adjustable stop elements 6501, 6502 it is possible to limit the movement of the actuator 6405 within a predetermined area. In the case of an angular actuator like the one illustrated, within a predetermined angular area. This is an advantage, as it prevents undesired movements of the actuator which instead may result in unexpected movements of the spinning machine.
- the textile element 1301, 1302 drawn in in Figure 4D may get stuck in the suction control element 2404 and cause the same to rotate on itself, in the clockwise direction, moving it back to the closed configuration and reducing the suction effect. Thanks to the presence of the stop elements 6501, 6502 such a risk of malfunction is avoided.
- the position of at least one of the stop elements 6501, 6502 is adjustable, for example through an adjusting screw or other adjusting systems. Thanks to this adjustment, it is possible to control the maximum degree to which the suction control element 2404 can be opened and closed. For example, if the stop element 6502 is located more leftwards with respect to the position illustrated in Figure 6A, if there are no tears it is possible to ensure that the suction control element 2404 remains only partially closed, and not completely closed as illustrated in the figure. Analogously, the complete or partial opening can be ensured by controlling the position of the stop element 6501.
- the actuator 6405 is based on the actuator 4405, the present embodiment is not limited to this case and the actuator 6405 could be based also on the actuator 5405, or on other actuators described in the present invention. Furthermore, as in the case of the actuator 4405, the actuator 6405 can be used both with the suction control element 2404 and with the suction control element 3404.
- Figure 7A schematically shows a side sectional view of a spinning machine 7000 and of a respective suction device according to a sixth embodiment of the present invention.
- Figures 7B and 7C schematically show an enlarged view and the operation of part of the embodiment illustrated in Figure 7A.
- the spinning machine 7000 is based on the spinning machine 2000 and differs from the spinning machines 4000-6000 in that the actuator 2405 is not constituted by the mechanical actuators 4405-6405, but by an electromechanical actuator 7405, preferably an electromagnet.
- the electromechanical actuator 7405 is illustrated only schematically, as different specific embodiments are possible, such as, for example, an electromagnet, an AC motor, a DC motor, a stepping motor, a pneumatic or hydraulic motor, or other solutions that make it possible to mechanically activate the suction control element 2404 through the actuator 7405 based on an electric signal, possibly converted by a motor or compressor in the case of a pneumatic or hydraulic actuator.
- the spinning machine 7000 comprises also a sensor 7601 suited to monitor the presence of the textile element. Even if in the figure the sensor 7601 is arranged in such a way as to monitor the presence of the second textile element 1302 in proximity to the second collection element 1304, the present invention is not limited to this configuration and the sensor 7601 can be placed in any position that allows the presence of the first or of the second textile element 1301, 1302 to be monitored.
- the sensor can be, for example, an optical sensor that monitors the presence of the textile element in a predetermined spatial area, such as an optical transmitter- receiver pair or a movement sensor that monitors the movement of the textile element or controls the rotation speed of the cursor around the ring at the level of the second collection element 1304. More generally, any type of sensor that makes it possible to monitor the presence or absence of the textile element in a predetermined spatial area can be used to obtain the sensor 7601.
- the sensor 7601 is also connected with the actuator 7405 of the suction control element 2404 through a connection (not illustrated herein). Thanks to such a connection, it is possible to control the actuator with the electric signal emitted by the sensor 7601.
- the connection can be wired or wireless.
- the actuator 7405 will be controlled in such a way as to maintain the suction control element in the closed configuration.
- the signal emitted by the sensor causes the actuator 7405 to move, so as to set the suction control element in the open configuration, as illustrated, and to cause the textile element with the tear to be drawn in.
- This embodiment is particularly advantageous, as it makes it possible to avoid a mechanical contact with the textile element 1301, 1302, and is thus particularly suitable for the cases where the mechanical contact required by the mechanical actuators 4405, 5405, 6405 is not possible. Furthermore, thanks to the electrical connection between the sensor 7601 and the actuator 7405, it is possible to position these two elements with a high degree of flexibility.
- the present embodiment is not limited to this case, and the actuator 7405 can be used both with the suction control element 2404 and with the suction control element 3404. Even more advantageously, it is possible to connect the sensor 7601 directly to the suction control element 3404, in such a way as to allow a completely electronic control of the suction power, which does not require any mechanical movements.
- Figures 8A and 8B schematically show a side sectional view of parts of a spinning machine 8000 and of a respective suction device according to a seventh embodiment of the present invention.
- the spinning machine 8000 is based on the spinning machine 2000 and differs from the latter owing to the additional presence of a cutting element 8701 and a respective actuator 8702.
- the cutting element 8701 shown herein is a generally circular element, with diameter substantially equal to that of the roller 1201, and placed in proximity to the latter.
- the actuator 8702 is an angular actuator, capable of making the cutting element 8701 rotate clockwise, until the end of the cutting element is introduced between the rollers 1201 and 1202 and remains squeezed between them, thus cutting the textile element 1301 and locking the portion of the textile element 1301 that is being introduced between the rollers 1201 and 1202.
- a cutting element having a linear shape and a linear actuator may be used to insert the cutting element between the two rollers 1201 and 1202.
- the cutting element may operate between the rollers 1203 and 1204, or between the rollers 1205 and 1206.
- the cutting element may be a pair of scissors operated by a specific actuator, a blade, or any element controlled by a specific actuator and capable of cutting the textile element, preferably upstream of the rollers 1201-1206.
- a spinning machine 8000 comprising a cutting element 8701 suited to cut the textile element 1301 and an actuator 8702 suited to operate the cutting element 8701, wherein the actuator 8702 suited to operate the cutting element 8701 is activated, preferably in a mechanical manner through a mechanical connection, by one of the mechanical actuators described above and suited to operate the suction control system 2404, 3404, or wherein the actuator 8702 comprises one of the mechanical actuators.
- the actuator 8702 for operating the cutting element 8701 and one of the mechanical actuators for operating the suction control element 2404, 3404 may be a single actuator.
- the cutting element 8701 can be connected to one of the mechanical actuators 2405, 4405, 5405, 6405, 1 1405, 12405, in such a way as to activate the cutting element 8701 based on the movement transmitted by the mechanical actuator.
- This solution can be obtained, for example, by positioning in a coaxial manner the rotation axis of the cutting element 8701 and of the suction control element. Such a solution, for example, can be obtained by properly directing the suction device upwards.
- an electromechanical actuator 8702 preferably an electromagnet
- controlling the actuator 8702 with the signal emitted by the sensor 7601 analogously to that which has been described with reference to the operation of the electromechanical actuator 7405.
- the sensor 7601 only to control the actuator 8702 of the cutting element 8701, while the operation of the actuator of the suction control element is of the mechanical type.
- the actuator 8702 and the actuator 7405 may be constituted by a single electromechanical actuator, activating both the cutting element 8701 and the suction control element 2404, 3404.
- Such an embodiment for example, can be obtained through a mechanical connection between the two actuators, thanks to which the movement of an actuator is reflected on the other actuator.
- a further sensor 10602 whose operation is similar to that of the sensor 7601, but which is positioned before the suction opening 1401, preferably between the spinning point 1200 and the suction opening, for example between the roller 1205 and the suction opening 1401, and which detects the presence of the cut portion of the textile element.
- FIG. 1 OA- IOC An embodiment including said second sensor is schematically illustrated in Figures 1 OA- IOC, in which the spinning machine 10000 differs from the spinning machine 7000 due to the presence of a second sensor 10602.
- the suction control element 2404, 3404 is maintained in the closed configuration, as shown in Figure 10A.
- the suction control element 2404, 3404 is open, as shown in Figure 10B.
- the electromechanical actuator 7405 activates the suction control element 2404, 3404 so that it returns to the substantially closed configuration.
- the actuator 2405, 4405, 5405, 6405 suited to operate the suction control element 2404, 3404 is configured in such a way as to set the suction control element in the closed configuration at least in response to the signal emitted by the second sensor 10602.
- suction is substantially activated only when there is a tear and for the time necessary to draw in the cut portion of the textile element 1301, 1302, therefore obtaining a further reduction in the consumption of the suction element 1402.
- the sensor 7601 it is also possible to additionally or alternatively use the sensor 10602 and/or the sensor 7601 in order to control only the operation of the actuator 2405, 4405, 5405, 6405, 7405 that operates the suction control element 2404, 3404 and/or to control only the operation of the actuator 8702 that operates the cutting element 8701, and/or to control both of them.
- FIGS. 1 1A and 1 IB schematically show two side sectional views of elements of a spinning machine 1 1000 and of a corresponding suction device according to a tenth embodiment of the present invention.
- the spinning machine 1 1000 is based on the spinning machine 2000 and differs from the latter with regard to the specific execution of the actuator 1 1405, only schematically shown in the spinning machine 2000, constituted by the actuator 1 1405 in the spinning machine 1 1000. Even more specifically, the operation of the spinning machine 1 1000 is similar to that of the spinning machine 4000 and the former differs from the latter only due to the shape of the actuator 1 1405 and of the suction control element 1 1404.
- the actuator 1 1405 comprises three elements 1 1405A, 1 1405B, and 1 1405D.
- the element 1 1405 A is a rotation axis for the actuator 1 1405 and for the suction control element 1 1404.
- the rotation axis 11405 A penetrates inside the suction pipe 1403 in such a way as to allow an integral connection between the suction control element 1 1404 and the actuator 11405.
- the element 1 1405B is an extension arm that allows the rotation axis 11405 A to be connected to the element 1 1405D.
- the shape of the extension arm is not limited to the one illustrated.
- the element 1 1405D is a feeler.
- the feeler 1 1405D When the textile element is continuous, meaning that it has no tears, as shown in Figure 11 A, the feeler 1 1405D is maintained in the represented position by the presence of the textile element. When a tear occurs, the feeler 1 1405D is not maintained in position any longer and the actuator 1 1405 rotates clockwise, causing the suction control element 11404 to open in a manner similar to that which has been described with reference to the spinning machine 4000.
- the suction control element 11404 is similar to the suction control element 2404, as it operates in a manner similar to that of a butterfly valve, and differs from it due to the configuration of the two halves of the valve disc, which are not positioned at 180° with respect to each other, but with an angle smaller than 180°. Thanks to this solution, it is possible to guarantee a closed configuration, as shown in Figure 1 1 A, obtaining, however, better suction in the case of an opening 1401 having a curved shape, like that illustrated in Figure 1 IB.
- spinning machine 1 1000 has been described as based on the spinning machine 4000, the present embodiment is not limited to this solution and could be based, for example, on any other spinning machine described herein.
- Figures 12A and 12B schematically show two side sectional views of elements of a spinning machine 12000 and of a corresponding suction device according to an eleventh embodiment of the present invention.
- the spinning machine 12000 is based on the spinning machine
- the spinning machine 12000 comprises at least one adjustable stop element 12501, 12502 operating in a manner similar to that of the adjustable stop elements 6501, 6502.
- the stop elements 12501, 12502 are mounted on an assembly or supporting element 12503, connected to the suction pipe 1403 and/or to the suction opening 1401 and/or to the structure that encloses the suction control element 1 1404, as illustrated.
- the stop elements 12501, 12502 can be screws or pins and the assembly element 12503 can be provided with a plurality of holes 12504, in such a way as to position and/or screw the stop elements 12501, 12502 in predetermined positions, and thus control the maximum opening and/or closing of the suction control element 1 1404.
- Figure 12A shows an adjustment of the closing stop element 12502, which locks the suction control element 1 1404 in a configuration that is not completely closed, thus obtaining an opening 12902.
- This has the advantage of offering a minimum degree of suction, which makes it possible, for example, to maintain the suction pipe 1403 clean and/or to avoid damaging the suction element 1402, in the case where all of the spinning points 1200 are in the closed position.
- the assembly element 12503 can be connected to the rest of the suction element in a removable manner.
- the assembly element 12503 can move according to the direction schematically indicated by the arrow 12505, and the movement can be stopped with a tightening screw not illustrated herein.
- This type of embodiment allows a precise and continuous adjustment of the predetermined region within which the actuator 12405 can move.
- the actuator 12405 may comprise an extension arm 12501 integrally connected to the actuator 12405, if necessary on the outside of the pipe 1403 on the side opposite the assembly element 12505, as well as a position sensor 12802.
- the extension arm 12501 can cooperate with the position sensor to determine the position of the actuator 12405.
- the extension arm 12801 can be magnetic and the sensor 12082 can be a Hall sensor or a relay, preferably of the Reed type.
- the extension arm 12801 can be made in any material and the position sensor 12802 can be an optical sensor.
- the extension arm 12801 can be avoided and replaced by the extension arm 1 1405B and/or, more generally, by any mobile element of the actuator 12405, if necessary by properly repositioning the position sensor 12802.
- the extension arm 12801 in the closed configuration the extension arm 12801 is misaligned with respect to the sensor 12802.
- the position sensor 12802 in the open configuration the extension arm 12801 is aligned with the sensor 12802, and the position sensor 12802 can thus emit a signal intended to indicate that the suction device is open.
- the signal can be used for various purposes, for example to activate a warning light 9902 and/or to activate the cutting actuator 8702 and/or to control the suction control element 3404.
- warning light 9902 for example schematically represented by the warning light 9902 shown in Figure 9A, if mounted on the spinning machine, or in Figure 12 A, if mounted on the suction device.
- the warning light 9902 is activated following the movement of the mechanical actuator 2405, 4405, 5405, 6405, 11405, 12405 or electromechanical actuator 7405 and/or in response to the signal emitted by the sensor 7601 and/or by the second sensor 10602 and/or by the position sensor 12802. More generally, the warning light 9902 is configured in such a way that it lights up when the suction control element 2404, 3404, 11404 is set in the substantially open configuration.
- the warning light 9902 can furthermore be configured so that it remains on in any case and needs to be switched off by the operator through a resetting operation. In this way, it is possible to warn the operator of the presence of the tear in the thread, so that the operator can provide for repairing the textile elements or for reconnecting the torn ends. Even though the warning light has been illustrated in combination with the spinning machine 9000 or with the suction device 12000, the present invention is not limited to this solution and the warning light can be carried out in combination with any spinning machine or suction device described.
- a pressure sensor that measures the suction pressure generated by the suction element 1402.
- the output value of the pressure sensor can then be compared with a reference value through a comparator and the resulting difference indicated by the comparator can be used to pilot the suction element 1402, thus obtaining an automatic control cycle that makes it possible to maintain the pressure inside the suction pipe 1403 at a desired value, and advantageously reducing the power consumption of the suction element 1402 that, in the presence, for example, of a suction opening completely closed by the suction control element 2404 reduces the suction flow rate and thus its own consumption.
- suction control elements in particular the suction control elements 2404, 3404, 1 1404, possibly in combination with one or more of the actuators described, in particular the actuators 2405, 4405, 5405, 6405, 7405, 11405, 12405, possibly in combination with one or more of the sensors described, in particular the sensors 7601, 10602.
- the spinning machine may comprise a spinning point 1200 for spinning the textile element, a suction element 1402 and a suction pipe 1403, on which the suction device may be mounted.
- the suction device can thus be produced and marketed independently of the spinning machine and can comprise a suction opening 1401 suited to be positioned in proximity to the textile element 1301, 1302 and a suction control element, for example any of those described as the suction control elements 2404, 3404, 1 1404, suited to be set at least in an open configuration and in a closed configuration, wherein in the open configuration the suction control element allows the suction element 1402 to draw through the suction opening 1401 and in the closed configuration the suction control element 2404, 3404, 1 1404 prevents the suction element 1402 from drawing through the suction opening 1401.
- the suction device can furthermore comprise an actuator, for example any of those described as the actuators 2405, 4405, 5405, 6405, 7405, 1 1405, 12405, suited to operate the suction control element, configured in such a way as to set the suction control element in the open configuration in the presence of at least one tear in the textile element and to set the suction control element in the closed configuration if there are no tears in the textile element.
- an actuator for example any of those described as the actuators 2405, 4405, 5405, 6405, 7405, 1 1405, 12405, suited to operate the suction control element, configured in such a way as to set the suction control element in the open configuration in the presence of at least one tear in the textile element and to set the suction control element in the closed configuration if there are no tears in the textile element.
- such minimum suction action can be obtained by guaranteeing an opening 12902 by means of the suction control element 1 1404.
- Said opening can be obtained with a suction control element 1 1404 having such a size that it does not come into contact with the suction pipe 1403, at least on one side.
- the suction control element 2404, 1 1404 has been described as being a component that is separate from the suction opening 1401.
- the present invention is not limited to this case and, alternatively, these two elements can be a single component.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Quality & Reliability (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Abstract
Description
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PCT/IT2015/000275 WO2017081707A1 (en) | 2015-11-10 | 2015-11-10 | Suction device for spinning machines |
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EP3374545A1 true EP3374545A1 (en) | 2018-09-19 |
EP3374545B1 EP3374545B1 (en) | 2020-01-15 |
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EP15832896.3A Active EP3374545B1 (en) | 2015-11-10 | 2015-11-10 | Suction device for spinning machines and spinning machine |
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EP (1) | EP3374545B1 (en) |
CN (1) | CN108603310B (en) |
WO (1) | WO2017081707A1 (en) |
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DE102019116224A1 (en) * | 2019-06-14 | 2020-12-17 | Maschinenfabrik Rieter Ag | Method for operating a suction device of a textile machine, as well as a suction device and a textile machine |
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DE3410471A1 (en) * | 1984-03-22 | 1985-09-26 | Fritz 7347 Bad Überkingen Stahlecker | OE FRICTION SPINNING MACHINE WITH A VARIETY OF SPINNING UNITS AND A MOVABLE MAINTENANCE DEVICE |
DE3515677A1 (en) * | 1985-05-02 | 1986-11-06 | Zinser Textilmaschinen Gmbh, 7333 Ebersbach | SPIDER |
FR2794137B1 (en) * | 1999-05-31 | 2001-07-27 | Schlumberger Cie N | DRAWING HEAD FOR DRAWING MACHINES PROVIDED WITH AN AUTOMATIC BLOCKING DEVICE OF PNEUMATIC DUCTS |
JP2005171476A (en) * | 2003-12-11 | 2005-06-30 | Mas Fab Rieter Ag | Method for operating fine spinning frame with suction system for spinning position and fine spinning frame with suction system for spinning position |
CH699713A2 (en) * | 2008-10-13 | 2010-04-15 | Rieter Ag Maschf | Spinning machine such as ring spinning machine, has machine frame, central suction device and multiple spinning points arranged on machine frame |
ATE557121T1 (en) * | 2009-03-23 | 2012-05-15 | Rieter Ag Maschf | SPINNING MACHINE WITH THREAD SUCTION DEVICE |
JP2013119695A (en) * | 2011-12-07 | 2013-06-17 | Maschinenfabrik Rieter Ag | Suction device in spinning machine |
CN204625888U (en) * | 2015-02-16 | 2015-09-09 | 河北宏润新型面料有限公司 | A kind of spun yarn moves about wind-blowing/absorbing device |
-
2015
- 2015-11-10 CN CN201580084470.3A patent/CN108603310B/en active Active
- 2015-11-10 EP EP15832896.3A patent/EP3374545B1/en active Active
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CN108603310B (en) | 2021-10-08 |
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EP3374545B1 (en) | 2020-01-15 |
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