JPH0343191B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for splicing a first yarn and a second yarn by pressure gas splicing. Pressurized air is often used as the pressurized gas.

In this type of device, the working process from receiving each thread to the final splicing is carried out automatically.

Especially in the case of thin yarns and yarns with special fiber structures, the adhesion of the fibers to each other may not be sufficient to achieve a satisfactory splicing by automatic splicers. For this reason, joining by splicing is often achieved only after the third or fourth splicing step.

Since manual splicers, it has been known to spray glue-containing liquids into pressurized air in an atomizer manner. However, such measures impart excessive adhesion to the yarn, resulting in sticking of the splicer and, ultimately, failure of the splicer due to corrosion. For automatic splicers, therefore, no means for supplying glue-containing liquids in an atomizer manner are available.

The object of the present invention is to improve the quality of spliced yarn seams, to extend the application of automatic splicing equipment to yarns with finer and special fiber structures, and to reduce the number of splicing steps per splicing station, and It also aims to improve the efficiency of textile machines in which pressure gas splicing devices are used.

According to the present invention, this problem can be solved in a method of splicing a first yarn with a second yarn by pressure gas splicing. (b) A substance that lubricates mechanical parts and prevents corrosion of mechanical parts. The solution is to supply a metered suspension containing the substance to the pressure gas before it enters the splicing chamber.

When splicing a specific yarn having a specific fiber structure, a predetermined amount of suspension must be metered and supplied into the pressurized gas for each splicing process. For this reason, there must be no excess or deficiency of suspension at the splicing site. The suspension should have properties that improve the above-mentioned fiber processing properties and prevent fiber adhesion. This requirement significantly limits the range of suspensions that can be used. Furthermore, the suspension must lubricate the mechanical parts and prevent corrosion of the mechanical parts. This is also of great importance in automatic splicing equipment.

These requirements are ideally met by the use of silicic acid hydrosols, oil and water suspensions as suspensions. A good outcome is
0.2-0.8% silicic acid hydrosol and 0.03%-0.5
This is achieved when water containing % oil is used as a suspension.

According to a further embodiment of the invention, the metered amount of suspension is transferred into the gas flow channel leading to the splicing chamber and is entrained in portions and finely distributed by the pressurized gas flow. This method is not carried out in the form of an atomizer, where the amount of additive added depends on the strength and duration of the pressure gas flow, but only a metered amount of added amount is always transferred into the gas flow path. be. This can be done before the gas flow starts, but it is also possible to do it during the gas flow.

The apparatus according to claim 5 for carrying out the method of the invention is characterized by:
It is provided that the gas flow path leading to the splicing chamber has at least one metering device for the suspension having the above-mentioned properties. Embodiments of the device according to the invention are set out in claims 6 to 10.

Dosing devices themselves are generally known. For example, electrically, mechanically, hydraulically or otherwise operated metering valves are known. Metering valves are also known which are controlled by a pressure impulse of the medium to be metered, which is fed into a supply conduit. The metered quantity is always independent of the type of control and the duration of the control process.

According to one embodiment of the invention, the metering device has a suspension discharge element that is exposed to the gas flow. This element can be, for example, a dish-shaped discharge element which is arranged in the center of the gas flow and can be closed by a valve. The metering device can be connected, for example, to a storage tank for suspensions. A pump can also be connected to the connecting conduit, which pump can also be switched. By switching the pump to "connected", pressure is applied in the conduit leading to the metering device, which causes the metering device itself to react and discharge the metered suspension into the gas flow path. . This metered suspension discharge always takes place only once per pressure increase.

A separate release element or a separate metering device can be provided for the oil-containing component of the suspension. This is particularly advantageous in cases where the suspension is not very stable and may have to be stirred.

Further advantages of the invention are obtained if the pressure gas metering valve is arranged upstream of the metering device. In this case, a common control device can therefore be provided for the pressure gas metering valve and the suspension metering device or pump.

It is advantageous for the metering device and/or the pump to be controlled by a contactless switch which is responsive to the movement of the yarn feeder. The pressure gas metering valve can also be controlled by a contactless switch responsive to the movement of the yarn feeder, in which case said contactless switch has an operative connection to the switching device. The switching device itself can also have a working connection to a pressure gas metering valve and a further working connection to a metering device and/or a pump. A second contactless switch for the metering device is not required in this case.

The advantages provided by the present invention are particularly recognized in the following points. Thus, according to the invention, in addition to mechanical and pneumatic means for achieving splicing, additional means are provided for making splicing possible where hitherto it was not possible. Additionally, additional means are provided for improving splicing effects where conventional processes were already possible but did not provide the necessary quality and strength.

The invention will now be explained with reference to the illustrated embodiment.

The device for joining the first thread 12 and the second thread 13 by splicing is generally designated 11. The thread 13 reaches the mounting 11 from the unwinding bobbin. The thread 12 is also transferred from the winding bobbin to the device 1.
It extends to 1.

The device 11 has two sheets 29, 30 which are mounted on a machine frame (not shown in detail) and are connected to one another by a support 31 of these sheets. The splicing chamber block 3 is mounted on the support 31.
2 is attached, the splicing chamber block 32 having a longitudinal groove 33 which can be closed by a lid 34. When the lid is open, both threads are inserted into the longitudinal groove 33. Vertical groove 33
The opening edges 35, 36 are rounded. The gas flow passage 37 opens into the interior of the splicing chamber block 32, which is defined by the longitudinal groove 33 and the lid 34. The gas flow passage extends to a pressure gas metering valve 39. A pressure gas tank 39a is arranged on the pressure gas inlet side of the pressure gas metering valve 39.
There is an adjustable pressure reducer 3 on the upstream side of the pressure gas tank.
There is 9b. Conduit 40 connects pressure gas metering valve 39
can be connected to a pressure gas source.

The yarn feeder 42 has a not shown mounting for locating and holding the yarn end of the first yarn 12. The thread tightening device 52 is arranged above the splicing chamber block 32 and above the thin plate 29, and the thread tightening device 53 is arranged below the splicing chamber block 32 and the thin plate 30. Both thread tightening devices each consist of two parts. The thread clamping device 52 has a stationary clamping piece 54 and a controllable clamping body 55, which clamping body 55 is pivotable about a hinge pin 56 and has a lever 57; This lever is controlled via a bar 58 by a cam disc, not shown. The thread clamping device 53 has a fixed clamping piece 59 and a controllable clamping body 60, which, like the clamping device 52, has a
It is controlled by a cam disc, not shown. The clamping piece 54 is connected to the thin plate 29 by a curved member 61. The clamping piece 59 is connected to the thin plate 30.

The drawing also shows a pivotable double-armed yarn feeder 62.
is shown and consists of a pin 63 and arms 64, 65 attached thereto. The yarn feeder 62 has a shaft 6 connecting the thin plate 29 to the thin plate 30.
6 and is rotatably supported on. A bar 67 is movably connected to pin 63 for pivoting yarn feeder 62 about axis 66.

The yarn feeder 62 can be pivoted from the illustrated yarn receiving position to the yarn discharging position. The pivot plane of the arm 64 is located above the chamber block 32, and the pivot plane of the arm 65 is located below. In the yarn receiving position, both arms of the yarn feeder 62 are located in the yarn path of both yarns 12, 13, which are located parallel after the yarn feeders 42 and 46 have been swiveled into their yarn release position.

Each arm of the yarn feeder 62 has two parallel yarn receiving slits of different depths. As can be seen from the drawings, the thread receiving slit 71 of the arm 64 is deeper than the thread receiving slit 70. Similarly, the thread receiving slit 72 of the arm 65 is deeper than the thread receiving slit 73. These yarn receiving slits of different depths are each arranged such that the shallower slit of one arm is aligned with the deeper slit of the other arm. When the yarn feeder 62 is in the yarn receiving position, the yarn receiving slit is located approximately in the pivot plane of the yarn feeders 42,46.

Each arm of the yarn feeder has a controllable yarn cutting device, in this case arm 64 has a yarn cutting device 7.
4 is attached to the arm 65, and a thread cutting device 75 is attached to the arm 65. Each thread cutting device has two
It consists of cutters that work together like scissors. One cutter is in each case connected to the associated arm, and the other cutter, which in each case is on the side of the splicing chamber block 32, is mounted pivotably about an axis 66. For example, a cutter 76 of a thread cutting device 74 is connected to the arm 64, whereas a cutter 77 of the same thread cutting device is pivotably mounted. A cutter 78 of a thread cutting device 75 is connected to the arm 65, whereas a cutter 79 of the same thread cutting device 75 is pivotably mounted. cutter 7
7 is pressed against the cutter 76 by a coil spring. The cutter 79 is also pressed against the cutter 78 by a coil spring 81. The coil spring 81 is supported by a disk 82 attached to the shaft 66. The other coil spring, which is not shown in the drawings, is supported by a pivot arm 83 which is rotatably mounted on the shaft 66 and supports the lid 34 of the splicing chamber block 32. The lid 34 has an insert 84,8 of sealing material.
5, which rest against the lines 86, 87 of the longitudinal groove 33 during lid closure, thereby preventing pressurized air and the individual fibers from escaping laterally from the splicing chamber 32. The yarn feeder 62, the yarn cutting devices 74, 75 and the pivot arm 83 of the lid 34 not only have one common pivot axis 66, but are also pivotable together. For this purpose, the pivot arm 83 supports a lever 89 at its rear end, which rests against the pin 63 under the action of a spring. Both cutters 76 and 78 are attached to arms 64 or 6.
5, the pivotable cutters 77 and 79 are carried together during pivoting of the yarn feeder 62 under the action of coil springs 80, 81. This entrainment of the cutters 77 and 79 is limited by adjustable stops 91,92.
This adjustability of the stopper is achieved by the tightening spring 103,
109. This makes it possible to precisely adjust the point in time at which the thread end is cut off to match the point in time at which pressurized air enters or blows in. Now, when the yarn feeder 62 is swiveled to the left, the yarn cutting devices 74 and 75 are closed together, and at this time the lever 106 of the cutter 77 and the similar lever 107 of the cutter 79 are released from the pin 63. The thread cutting device is then closed like scissors. Yarn feeder 6
2 is pivoted back to the thread receiving position, the pin 63
are brought into contact with levers 106 and 107. As a result, the thread cutting device opens again into a scissor-like manner when a further pivoting takes place. The thread cutting devices 74 and 75 are activated in each case at the thread receiving slit in which the thread end to be cut off is located, namely at the thread receiving slit 71 in the arm 64 and at the thread receiving slit 72 in the arm 65. It is arranged so that it is forced.

Pressure gas metering valve 39, responsive to the movement of the yarn feeder 62, and tightening screw 1 at the support 31
Non-contact type switch 93 whose position can be adjusted by 10
and can be adjusted and controlled by a limit switch 94. For this purpose, parts 39, 93 and 94 are connected to an electrical switch device 95. Non-contact type switch 9
3 adjustability allows the gas blowing start point to be adjusted to the yarn feeder 6.
This makes it possible to precisely adjust the point of end of gas blowing in relation to the position of 2 and in relation to the position of the thread cutting device and the time of thread end cutting. The drawing shows a conductor 96 extending to the contactless switch 93 and a conductor 97 extending to the pressure gas metering valve 39. The limit switch 94 has two switches 98, 99 for adjusting the blowing time and an indicator 100 for indicating the adjusted blowing time.

As can be seen from the drawings, some parts of the device 11 have special thread guiding contours. This can be seen, for example, in the suction slot nozzle 45 of the yarn feeder 42, the yarn tightening devices 52, 53 and the thin plates 29, 30.

The gas flow path 37 is a metering device 1 for the suspension 112.
It has 11. There is a passage narrowing part 121 in the metering device 111, the cross section of which is narrowed by the adjusting screw 1.
19. Furthermore, there is a suspension outlet 113 exposed to the gas flow, which consists of a tube piece extending into the constriction 121 .
The free cross section of the suspension outlet 113 is formed by the adjusting screw 12.
0, which adjusting screw also simultaneously adjusts a solenoid metering valve (not shown) for the suspension. Metering device 111 via conduit 118
is connected to pump 115. pump 115
is attached to the bottom of a storage tank 114 that receives suspension 112.

Pressure gas metering valve 39 is arranged upstream of metering device 111 . The switching device is connected to the metering device 111 by a conductor 116 and to the pump 115 by a conductor 117, so that the metering device 111 and/or the pump 115 can be selectively connected to the contactless switch 93. can be controlled by

In the illustrated embodiment, the switch device 95 is adjusted in such a way that a switch pulse is selectively emitted via all three connecting conductors 97, 116, 117 when the contactless switch 93 is actuated in response. The duration of the switch pulses emitted via conductors 97 and 117 corresponds to the blowing time. One short switch pulse is emitted via conductor 116 during the blowing period. During pressure gas flow,
Pump 115 applies pressure to conduit 118 and then a metered amount of suspension is fed into the flowing pressurized gas.

Next, the working style of the apparatus of the present invention will be explained using a yarn splicing process as an example.

The yarns 12 and 13 reach the yarn receiving slit of the yarn feeder 62 by the return pivoting of the feeders 42 and 46. The previously mentioned thread guide profile directs the first thread 12 coming from the pay-off bobbin between the clamping piece 54 and the clamping body 55 of the thread clamping device 52 and into the thread receiving slits 70, 72 of the yarn feeder 62. Useful for insertion. The second yarn is located in yarn receiving slits 71 and 73 of the same yarn feeder.

Now, when a control transmission, not shown, moves two cam discs, also not shown, the bar 67 is pulled in the direction of arrow 104 and the lever 58 in the direction of arrow 105. bar 6
7, both arms of the yarn feeder 62 and the lid 3
The turning arm 83 of No. 4 turns to the left side in the drawing. Due to the different depths of the thread receiving slits, the threads are inserted into the longitudinal groove 33 in a crossed manner. Both thread cutting devices are still open. Immediately before reaching the end position, which is also the yarn release position for the yarn feeder 62, the lid 34 with its inserts 84, 85 rests against the edges 86 and 87 of the longitudinal groove 33 of the splicing chamber block 32. It will be done. At the same time, both thread tightening devices 52, 53 are closed together, whereas the cutters 77 and 79 hit the stops 91 and 92. At the same moment, the contactless switch 93 detects the approach of the arm 65 of the yarn feeder 62. The contactless switch 93 switches the pressure gas metering valve 39 and the pump 115 into connection via the electrical switch device 95 for the duration of the blowing time set in the limit switch 94. Pressure gas tank 39a
The stored pressure gas within flows into the splicing chamber 32. At the same time, a subsequent pressure gas of regulated pressure flows in via the pressure reducer 39b. During a blowing period of, for example, 2 seconds, both arms of the yarn feeder 62 pivot further to the left in the drawing. As a result, both arms finally reach their end position. After switching on the pressure gas metering valve 39 and the pump 115, a short switch pulse is emitted to the metering device 111, which causes the metered suspension quantity to enter the flowing pressure gas. reach During this time, the thread cutting device operates, and the excess thread end is cut off and sucked out. The low clamping force of the thread clamping device ensures a subsequent withdrawal of the thread, which may be necessary during the splicing process.

By moving the bar 67 back in the direction opposite to the arrow 104 and the bar 58 in the opposite direction to the arrow 105 by means of the cam disc, the yarn feeder 62 is moved back to its starting position without delay and the yarn tightening device is activated. be opened. The thread cutting device at the start of the return cycle described above initially remains closed for only a limited time, ie until the pin 63 reaches both levers 106 and 107. Only after this can the cutting device be opened again. The lid 34 is also opened with a time delay, since the pin 63 is connected to the lever 8 of the pivot arm 83.
It will be reopened for the first time from the time we arrive on 9 p.m.
Return of the thread cutting device and complete opening of the lid 34 is achieved only when the pin 63 is returned to the position shown by the bar 67.

The yarn spliced by splicing with pressurized air now passes through the open yarn clamping device 75, the yarn receiving slit 73 of the arm 65, the yarn receiving slit 73 of the arm 64, and the front of the splicing chamber 32, which is open. , located within the thread receiving slit 70 of the arm 64 and the thread tightening device 52 which is open. By the way, when the operation is resumed at the yarn winding section, the yarn quickly moves to the device 11 based on the winding tension.
escape from

The device 11 can be provided stationary or movably. The device 11 can optionally be provided at all yarn winding points or working points of the textile machine;
Alternatively, it is also possible to operate selectively and sequentially at different work locations.

The invention is not limited to the illustrated embodiment, but can be implemented in various different ways.

[Brief explanation of drawings]

The drawing is a schematic diagram of parts of an automatic pressure gas splicing apparatus according to an embodiment of the present invention. 12... Thread, 13... Thread, 29... Thin plate, 30
... Thin plate, 31 ... Support, 32 ... Splicing chamber (block), 33 ... Vertical groove, 34 ... Lid,
35...Opening edge, 36...Opening edge, 37...
Gas flow passage, 39... Pressure gas metering valve, 39a...
...Pressure gas tank, 39b...Pressure reducer, 40...
Conduit, 42... Yarn feeder, 46... Yarn feeder, 52...
...Thread tightening device, 53...Thread tightening device, 54...Tightening piece, 55...Tightening body, 56...Hinge pin, 5
7... Lever, 58... Bar, 59... Tightening piece,
60... Tightening body, 62... Yarn feeder, 63... Pin, 64... Arm, 65... Arm, 66...
Shaft, 67... lever, 70... thread receiving slit, 71... thread receiving slit, 74... thread cutting device, 75... thread cutting device, 76... cutter,
77...cutter, 78...cutter, 79...
cutter, 81... coil spring, 82... disc,
83...Swivel arm, 84...Insert, 85...
Insert body, 86... edge, 87... edge, 89... lever, 91... stopper, 92... stopper, 93
... Non-contact type switch, 94 ... Limit switch, 95 ... Switch device, 96 ... Conductor, 97
... Conductor, 98 ... Switch, 99 ... Switch, 100 ... Indicator, 103 ... Tightening screw, 1
09...Tightening screw, 111...Measuring device, 112
...Suspension liquid, 113...Suspension liquid outflow section, 114...
...Storage tank, 115...Pump, 116...Conductor, 117...Conductor, 118...Conduit, 119...
... Adjustment screw, 120 ... Adjustment screw, 121 ... Passage narrowing portion.

Claims (1)

[Claims] 1. In a method of splicing a first yarn and a second yarn by pressure gas splicing, (a) technical characteristics of fiber processing, fiber aggregation, and mutual adhesion of fibers; (b) Substances that lubricate mechanical parts and prevent corrosion of mechanical parts; Substances described in (a) and (b) above. A method for splicing by pressure gas splicing, characterized in that a metered suspension comprising: is supplied to a pressure gas before the pressure gas enters the splicing chamber. 2. The method for splicing yarn according to claim 1, which uses a suspension containing silicate hydrosol, oil, and water. 3 0.2-0.8% silicic acid hydrosol and 0.03-0.8%
3. A method for splicing yarn according to claim 2, wherein water containing 0.5% oil is used as a suspension. 4. Any one of claims 1 to 3, in which the metered amount of suspension is transferred into a gas flow path leading to the splicing chamber, and is entrained and finely distributed little by little by a pressurized gas flow. How to perform the thread splicing described in section. 5 It has a splicing chamber for splicing two threads that can be inserted into the splicing chamber by pressure gas splicing, a gas flow path that opens into the splicing chamber, and a pressure gas metering device, and The flow channel 37 has at least one metering device 111 for a suspension 112, the suspension 112 being controlled by: (b) Substances that lubricate mechanical parts and prevent corrosion of mechanical parts; Contains the substances listed in (a) and (b) above. A device for piecing yarns by pressure gas splicing, characterized by: 6. The metering device 111 for suspensions has a suspension discharge element 113 exposed to a gas flow and controls the suspension discharge element 113.
A device for splicing threads as described in Section 1. 7 The metering device 111 for the suspension 112
12, and a metering device 111 for the suspension and a storage tank 114.
An apparatus for splicing yarn according to any one of claims 5 and 6, wherein a pump 115 is connected between the yarn splicing device and the yarn piecing device. 8. Any one of claims 5 to 7, in which a specific release element or a specific metering device is provided for the oil-containing component of the suspension 112.
A device for splicing threads as described in Section 1. 9. Claims 5 to 8, in which a pressure gas metering valve 39 is arranged upstream of the suspension metering device 111, and the pressure gas metering valve 39 is adjustable and controllable. A device for splicing yarn according to any one of the items. 10 The metering device 111 and/or the pump 115 for the suspension can be controlled by a non-contact switch 93 that operates in response to the movement of the yarn feeder 62, the non-contact switch being the switch device 95. The switch device has a working connection 96 extending to the pressure gas metering valve 39 , a metering device 111 for the suspension and/or a pump 115 .
Device for splicing according to any one of claims 5 to 9, characterized in that it has further working connections (116, 117) extending to.