DE3145502A1 - Method and device for connecting a first yarn to a second yarn by compressed-gas splicing - Google Patents

Abstract

The compressed gas, before entering the splicing chamber, receives a metered quantity of a suspension which contains a substance improving the textile properties and cohesion of the fibres, the mutual adhesion of the fibres and the strength of the yarn and preventing the fibres from sticking together and a substance having a lubricating and corrosion-preventing effect on machine parts. Such a suspension consists, for example, of siliceous hydrosol, oil and water. A metering device inserted into the gas-flow channel is advantageously used for this. The object is to achieve an increase in the quality of a spliced joint and a broadening of the range of use of a compressed-gas splicing device.

Description

Method and device for joining a first thread

with a second thread by pressurized gas splicing The invention relates to a method and apparatus for joining a first thread to a second Thread through pressurized gas splicing. Compressed air is usually used as the compressed gas.

Such a device is able to take up the single threads to bring about an automatic workflow up to the finished thread connection.

With particularly thin threads and threads with a special fiber structure the adhesion of the fibers to one another may not be sufficient with one automatic splicer to achieve a good splice connection. This works often only after the third or fourth splice attempt.

It is known from hand splicers in the manner of an atomizer Mix glue-containing liquid into the compressed air.

However, this leads to sticky or sticky threads, to sticking of the device and ultimately to the destruction of the device due to corrosion. For Automatic splicers are the addition of glue-containing liquid kit in the manner of an atomizer therefore completely useless.

The invention is based on the problem of the quality of the splice connection to improve the use of an automatic splicer towards thinner threads and threads with a special fiber structure to expand the number of To reduce splicing attempts per splice point and the overall effectiveness of the Textile machine on which the compressed gas splicing device is to be used to enhance.

This object is achieved according to the invention in that the compressed gas a metered amount of a suspension is supplied before entering the splice chamber which a) one the textile-technical properties and the cohesion of the Fibers, which improve the adhesion of the fibers to one another and the strength of the thread and fabric preventing the fibers from sticking together, b) lubricating one on machine parts and contains an anti-corrosive substance.

The amount should be dosed. When splicing certain threads with certain Fiber structure is always a certain amount of suspension in each splice attempt given the pressurized gas. For this reason, there is neither a defect at the splice point there is still an excess of suspension. The suspension should be designed in such a way that that the technical textile properties mentioned are improved, gluing however is prevented. This requirement limits the range of suspensions that can be used very strong one. In addition, it is required that the suspension lubricate machine parts and should be effective against corrosion. The last point of view is also at automatic splicers are of great importance.

The requirements are ideally met when a suspension containing silica hydrosol, oil and water. Good results are achieved when a pension is used, the water with 0.2 to 0.8 ° h contains silica hydrosol and 0.03 to 0.5% oil.

In a further embodiment of the invention it is proposed that a dosed amount of suspension in a gas flow channel leading to the splice chamber brought and carried along by the flow of pressurized gas and finely distributed. this does not take place in the manner of an atomizer, in which the quantity of the pulling agent depends on the strength and duration of the compressed gas flow, but it will always be the dosed amount brought into the gas flow channel. That can be done before the Gas flow begins, but it can also happen when the gas flows of the method is proposed according to claim 5 that a leading to the splice chamber Gasströmungskaa nal at least one metering device for the above Has suspension. Further refinements of the invention are set out in the subclaims 6 to 17.

Dosing devices are known per se for general purposes. There are, for example, metering valves that are electrical, mechanical, fluidic or open operated in another way. There are also metering valves that operate by a pressure surge of the medium to be dosed, which is fed into the supply line, are controllable. The success is always the same.

A dosed amount is always dispensed. This amount is always regardless of the type of control and the duration of the control process.

In a further embodiment of the invention it is proposed that the Metering device has a suspension-dispensing element exposed to the gas flow. This can be, for example, a dispensing plate that can be closed by a valve The metering device is arranged in the middle of the gas flow can be connected, for example, to a storage vessel for the suspension. In the connecting line a pump can be switched, and this pump can also be switched.

When the pump is switched on, the one leading to the dosing device is activated Line put under pressure, whereby the metering device itself responds and releases the metered amount into the gas flow channel. The release occurs per pressure increase each time only once.

For the oil-containing component of the suspension can have its own Dispensing element or its own metering device may be available. De can in particular be advantageous when the suspensions are not very stable and possibly must be stirred.

If a compressed gas metering valve is arranged upstream of the metering device there are still further advantages of the invention. It can be a common control device for the pressurized gas metering valve and the metering device or the pump be.

The metering device and / or the pump is advantageous by one Controllable proximity switch responsive to the movement of the thread feeder. The pressurized gas metering valve can also be activated by the movement of the thread feeder addressable proximity switch to be controllable, which is an operative connection to a Has switching device, which in turn has an operative connection to the compressed gas metering valve and has a further operative connection to the metering device and / or to the pump. A second proximity switch for the metering device is then not required.

The advantages achieved with the invention are in particular: that about the mechanical and pneumatic measures to produce a splice connection In addition, additional measures are taken to enable splice connections there, where they were not possible before and to improve the Splelßver connections there, where they were possible before, but not the necessary quality and strength exhibited.

An embodiment of the invention is shown in the drawing. The invention is explained and described in greater detail on the basis of this exemplary embodiment.

The drawing shows a perspective view of an automatic Pressurized gas splicing device with the improvement according to the invention shown schematically.

A device for joining a first thread 12 to a second Thread 13 is denoted by 11 as a whole. The thread 13 comes from a pay-off bobbin to device 11.

The thread 12 also arrives at the device from a take-up bobbin 11.

The device 11 has two on one not shown Machine frame fastened plates 29, 30, which are connected to one another by a carrier 31 are connected. A splice chamber 32 is attached to the carrier 31. The splice chamber 32 has a longitudinal groove 33 which can be closed by a cover 34. at With the lid open, the threads can be inserted into the longitudinal groove of the splice chamber. The edges 35, 36 of the longitudinal groove 33 are rounded. Lin gas flow channel 37 opens into the through the longitudinal groove 33 and the Cover 34 formed Interior of the splice chamber 32. The gas flow channel leads to a pressurized gas metering valve 39.

On the compressed gas inlet side of the compressed gas metering valve 39 is a Compressed gas storage 39a arranged. Upstream of the compressed gas reservoir 39a is located an adjustable pressure reducer 39b. The pressurized gas metering valve is through a pipe 40 39 can be connected to a pressurized gas source.

A thread feeder 42 is not shown with means for Finding and holding the thread end of the first thread 12 is provided. One of these Means consists of a suction slot nozzle 5. The drawing shows the thread feeder 42 in the thread delivery position.

Another pivotable thread feeder 46 is provided with means for searching and holding the thread end of the second thread 13. These funds exist among other things from a suction nozzle 49. The thread feeder 46 is also in the thread delivery position drawn.

The drawing also shows two controllable thread clamping devices 52, 53 recognize. The thread clamping device 52 is above the chamber 32 and also above the sinker 29, the thread clamping device 53 below the splice chamber 32 and also arranged below the board 30. Each of the two thread clamping devices is constructed in two parts. The thread clamping device 52 has a fixed clamping piece 54 and a controllable clamp 55 which is pivotable about a swivel joint 56 and a Lever 57 has which by means of a rod 58 through a cam disk, not shown is controllable. The thread clamping device 53 has a fixed clamping piece 59 and a controllable clamp 60 which, like the clamping device 52, has a non shown cam is controllable. The clamp 54 is connected to the circuit board 29 by a bracket 61. The clamping piece 59 is with the Board 30 connected.

The drawing also shows a pivotable two-armed suture feeder 62, consisting of a bolt 63 with attached arms 64 9 65. The thread feeder 62 is rotatable on an axis 66 9 which connects the plate 29 to the plate 30 stored. A rod 67 is used to pivot the thread feeder 62 about the axis 66 movably connected to the bolt 63 the thread feeder 62 can be figured from the Fa denaufnahmeststellung pivoted into a thread delivery position. The pivot plane of the arm 64 is above and the pivot plane of the arm 65 is below the chamber 32. The two arms of the thread feeder are in the thread take-up position 62 in the thread run after the thread feeders 42 and 46 have been pivoted into their thread dispensing positions parallel threads 129 13.

Each arm of the suture feeder 62 has two adjacent ones unevenly deep thread take-up slots. The drawing shows 5 that the thread take-up slot 71 of the arm 64 is deeper than the thread take-up slot 70. The thread take-up slot is likewise 72 of the arm 65 is deeper than the thread-receiving slot 73. These thread-receiving slots of unequal depth are arranged so that in each case the less deep thread take-up slot of the one Arm lies in alignment over the deeper thread take-up slot of the other arm. In the thread take-up position of the thread feeder 62 are the thread take-up slots approximately in the pivot plane of the thread feeders 42 and 46.

Each arm of the thread feeder has a controllable thread cutting device, namely, the arm 64 is the thread cutting device 74 and the arm 65 is the thread cutting device 75 assigned. Each thread cutting device consists of two working together like scissors Knives. One knife is connected to the associated arm, the other knife, In each case the knife facing the splice chamber 32 is about the axis 66 pivoted. The knife 76 of the thread separating device 74 is for example connected to the arm 64, while the knife 77 of the same thread cutting device is pivotably mounted. The knife 78 of the thread cutting device 75 is with the Arm s5 connected, while the knife 79 of the same thread cutting device is pivotable is stored. The knife 77 is pressed against the knife 76 by a helical spring. The knife 79 is also pressed against the knife 78 by a helical spring 81. The helical spring 81 is supported against a disk fastened on the axle 66 82 from.

The other, not shown helical spring is supported against a pivot arm 83 rotatably mounted on the axis 66, which covers the cover 34 of the Splice chamber 32 carries. The cover 34 has inserts made of sealing material 84, 85 which, when closed, lie against the edges 86, 87 of the longitudinal groove 33 and this prevents compressed air and individual fibers from escaping from the side of the splice chamber 32 can escape.

The thread feeder 62, the thread cutting devices 74, 75 and the Swivel arm 83 of cover 34 not only have a common swivel axis 66, they can also be swiveled together. For this purpose, the pivot arm 83 carries at the rear End of a lever 89, which is counteracted by the action of a coiled spiral spring the bolt 63 sets. While the two knives 76 and 78 with arms 64 and 64 respectively 65 are connected, the pivoting knives 77 and 79 are under the action of Coil springs 80, 81 when pivoting the thread feeder 62 also taken away. This entrainment of the knives 76 and 78 is through adjustable stops 91, 92 limited The adjustability is given by clamping screws 108, 109.

In this way, the time at which the thread ends are severed can be set precisely and adjusted to the time of the compressed air inlet or to the blowing time. If the thread feeder 62 is now pivoted to the left, the thread cutting devices close 74 and 75, the lever 106 of the knife 77 and also a similar lever 107 of the knife 79 stands out from the bolt 63. The thread separators are now closed like scissors. When the thread feeder 62 is pivoted back into the groove thread take-up position the bolt 63 rests against the levers 106 and 107, whereby the pivoting further the thread cutting devices are opened again like scissors. The thread cutting devices 74 and 75 are arranged so that they are continuous at the thread receiving slots, respectively in which the thread ends to be cut are located, that is for arm 64 the thread take-up slot 71 and, on the arm 65, the thread take-up slot 72.

The compressed gas metering valve 39 is on the movement of the Fadenzubringers 62 responsive, in its position on the carrier 31 by means of a clamping screw 110 adjustable proximity switch 93 controllable by a timer 94 adjustable and controllable at the same time. For this purpose the parts 39, 93 and 94 connected to an electrical switching device 95. The adjustability of the proximity switch 93 ensures the precise setting of the start of gas injection depending on the position of the thread feeder 62 and ultimately also in Dependence on the position of the thread cutting devices and the time of the Separation of the thread ends. The drawing shows the one leading to the proximity switch 93 Active connection 96 and the leading to the compressed gas metering valve 39 Active connection 97. The time switch device 94 has two switches 98, s99 for Setting the blowing time and a visual indicator 100 for displaying the set Blowing time.

The drawing shows that some parts of the device 11 are special Have thread guide contours. This is for example the suction slot nozzle 45 of the thread feeder 42, the thread clamping devices 52, 53 and the sinkers 29 and 30 the case.

The gas flow channel 37 has a metering device 111 for a Suspension 112, which contains the substances mentioned in claim 5. Internally the metering device 111 has a channel constriction 121, the extent of which is adjustable by an adjusting screw 119. In addition, one is exposed to the gas flow Suspension delivery element 113 is present, which consists of a protruding into the constriction 121 Tube consists. The free cross section of the suspension delivery element is through an adjusting screw 120 adjustable, which is also an electromagnetic metering valve sets for the suspension, which is not shown in the drawing here is. The metering device 111 is connected to a pump 115 via a pipeline 118 tied together. The pump 115 sits at the bottom of a storage vessel 114 that holds the suspension 112 contains.

The pressurized gas metering valve 39 is upstream of the metering device 111 arranged. Since the switching device has an operative connection 116 with the metering device 111 and through an operative connection, 117 is connected to the pump 115, can optionally also the metering device 111 and / or the pump 115 through the proximity switch 93 can be controlled.

In the present exemplary embodiment, the switching device 95 set so that when the proximity switch 93 responds, all three Active connections 97, 116 and 117 can optionally be given switching pulses. The length of time corresponds to the switching pulses output via the active connections 97 and 117 the blowing time. The operative connection 116 is only used for a short time during the blowing time Output switching pulse. While the pressurized gas flows, the pump 115 sets the pipeline 118 under pressure and then the metered amount of suspension is added to the flowing pressurized gas given.

Based on the drawing, the functioning of the inventive Device are explained using the example of a thread joining process.

The threads 12 and 13 are by pivoting back the thread feeder 42 and 46 enters the thread take-up slots of the thread feeder 62. The above mentioned thread guide contours ensure that the first thread 12, from a winding bobbin coming, between clamping piece 54 and clamp 55 of the thread clamping device 52 and in the thread take-up slots 70 and 72 of the thread feeder 62 has been inserted. Of the Second thread 13 lies in thread receiving slots 71 and 73 of the same thread feeder.

Now, a control gear (not shown) does not set two shown cams in motion, which ensure that the rod 67 in Direction of arrow 104 and the rod 58 are pulled in the direction of arrow 105. During the movement of the rod 67, the two arms of the thread feeder pivot 62 and the pivot arm 83 of the cover 34 to the left. Because of the unequal depth of the thread take-up slots the threads are inserted into the longitudinal groove 33, crossing one another.

The two thread cutting devices are still open. Shortly before the Reaching the end position, which is equivalent to the thread feeder 62 The thread delivery position is already the cover 34 with its inserts 84, 85 against the edges 86 and 87 of the longitudinal groove 33 of the splice chamber 32.

At the same time, both thread clamping devices 52, 53, while the knives 77 and 79 strike against the stops 91 and 92, respectively. At the same moment the proximity switch 93 detects the approach of the arm 65 of the thread feeder 62. The proximity switch 93 causes the electrical Switching device 95 switches on the pressure gas metering valve 39 and the pump 115 for the blowing time set on the timer 94. The one in the pressurized gas storage tank 39a existing pressurized gas supply now flows into the splice chamber 32. At the same time, sets A subsequent flow of pressurized gas at the set pressure is initiated via the pressure reducer 39b. During the blowing time of 2 seconds, the two arms of the thread feeder swivel 62 further to the left, so that they finally reach the end position. After this Switching on the pressurized gas metering valve 39 and the pump 115 is a brief one Switching pulse reaches the metering device 111 and the metered amount of suspension into the flowing pressurized gas. Meanwhile, the thread cutting devices come to Effect and the excess thread ends are separated and sucked off. One soft adjustment of the cadence clamps ensures that the Threads, if the splicing process requires it.

The thread feeder 62 moves out of the end position without delay brought back into its basic position and opened the thread clamping device, by the cam plates ensure that the rod 67 against the direction of the Arrow 104 and the rod 5 against the direction of the Arrow 105 moved back will. At the beginning of this backward movement, the thread cutting devices initially remain still closed for a limited time, namely until the bolt 63 the has reached both levers 106 and 107, after which the thread cutting devices only again can be opened.

The cover 34 is also opened with a time delay, and that too only again from the point in time when the rollers 63 push the lever 89 of the pivot arm 83 has reached. The resetting of the thread cutting devices and the complete opening of the cover 34 is only reached when the bolt 63 through the rod 67 so far is returned, as the drawing shows.

The thread connected by compressed air splicing is now in the opened one Thread clamping device 75, the thread take-up slot 73 of the arm 65, in front of the open Splice chamber 32, the thread take-up slot 70 of the arm 64 and in the opened thread clamping device 52. When the winding unit then goes back into operation, the thread snaps as a result of the re-establishment of the winding tension out of the device 11.

The device 11 can be used stationary or capable of hiking. It can optionally be used at every winding station or work station of a textile machine exist or work one after the other at different workplaces.

The invention is not limited to the illustrated and described Aufihrungbc i play hesr, chrrinkt. Other exemplary embodiments are also included in the framework and variants conceivable and possible.

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Claims (9)

Claims: 10 method for connecting a first thread with a second thread by compressed gas splicing, thereby g e k e n n n z e i z hn e t that the compressed gas before entering the splice chamber a metered amount of a Suspension is supplied which a) one the textile properties and the cohesion of the fibers, the adhesion of the fibers to one another and the strength the thread improving and a sticking of the fibers preventing fabric, b) a Contains substances that lubricate and protect against corrosion on machine parts 2 Method according to claim 1, characterized in that a suspension is used containing silica hydrosol, oil and water. 3 The method according to claim 2, characterized in that a suspension is used, the water with 0.2 to 0.8 °, b silicic acid hydrosol and 0.03 to 0.5% Contains oil 4. The method according to any one of claims 1 to 3, characterized characterized in that a metered amount of suspension leads to a splicing chamber Brought gas flow channel and carried away by the flow of pressurized gas and finely distributed will. 5. Device for performing the method according to one of the claims 1 to 4, with a splice chamber for pressurized gas splicing of two into the splice chamber insertable threads, with a gas flow channel opening into the splice chamber and with a pressurized gas metering device, characterized in that the gas flow channel (37) has at least one metering device (111) for a suspension (112), a) one is the technical textile properties and the cohesion of the fibers, Improving the adhesion of the fibers to one another and the strength of the thread and fabric preventing the fibers from sticking together, b) lubricating one on machine parts and contains an anti-corrosive substance. 6. Apparatus according to claim 5, characterized in that the suspension (112) Contains silica hydrosol, oil and water. 7. Apparatus according to claim 6, characterized in that the suspension (112) contains water with 0.2-0.8% silica hydrosol and 0.03-0.5% oil. 8. Device according to one of claims 5 to 7, characterized in that that the metering device (111) is a suspension delivery element exposed to the gas stream (113) 9. Device according to one of claims 5 to 8, characterized in that that the metering device (iii) is controllable. ao. Device according to one of Claims 5 to 9, characterized in that that the metering device (111) with a storage vessel (114) for the suspension (112) is connected. 11. The device according to claim 10, characterized in that between Dosing device (111) and storage vessel (114) a pump (115) is connected. 12. The apparatus according to claim 11, characterized in that the Pump (115) is switchable. 13. Device according to one of claims 5 to 12, characterized in that that the oil-containing component of the suspension (112) has its own delivery element or a separate metering device is available. 14. Device according to one of claims 5 to 13, characterized in that that upstream of the metering device (111) a pressure gas metering valve (39) is arranged is. 15. Device according to one of claims 5 to 14, characterized in that that the pressure gas metering valve (39) is adjustable and controllable. 16. Device according to one of claims 5 to 15, characterized in that that the metering device (111) and / or the pump (115) by one on the movement of the thread feeder (62) addressable proximity switch (93) is controllable. 17. The device according to claim 16, characterized in that the Pressurized gas metering valve (39) by one on the movement of the thread feeder (62) addressable proximity switch (93) is controllable, which is an operative connection (96) to a switching device (95), which in turn has an operative connection (97) to the pressurized gas metering valve (39) and a further operative connection (116, 117) to the metering device (111) and / or to the pump (115).