CN101613903B - Picking method and picking apparatus in jet weaving machine - Google Patents
Picking method and picking apparatus in jet weaving machine Download PDFInfo
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- CN101613903B CN101613903B CN 200910150339 CN200910150339A CN101613903B CN 101613903 B CN101613903 B CN 101613903B CN 200910150339 CN200910150339 CN 200910150339 CN 200910150339 A CN200910150339 A CN 200910150339A CN 101613903 B CN101613903 B CN 101613903B
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
- D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
- D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
- D03D47/3026—Air supply systems
- D03D47/3053—Arrangements or lay out of air supply systems
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Abstract
The invention discloses a picking method in jet weaving machine for picking by leading the weft yarns jet from the main nozzle by the air jet of the auxiliary nozzle. The picking method comprises switching the high pressure state of the front half into the low pressure state of the jet pressure during the air jet of the auxiliary nozzle.
Description
Technical field
The present invention relates to draw picking method and weft insertion device the jet loom that the weft yarn that penetrates from main burner carries out picking through the aerojet of pilot jet.
Background technology
Weft yarn drawing through the aerojet of pilot jet from the main burner ejaculation carries out the jet loom of picking, and expectation is carried out stable picking and realized the reduction of specific air consumption.Disclosed technology is the technology that realizes that stable picking or specific air consumption reduce in japanese kokai publication hei 3-97939 communique, japanese kokai publication hei 6-123041 communique, japanese kokai publication hei 6-257034 communique, japanese kokai publication hei 8-74143 communique, japanese kokai publication hei 8-113850 communique, the japanese kokai publication hei 11-12891 communique.
In japanese kokai publication hei 3-97939 communique, the technology of the shape of the spray-hole that improves pilot jet is disclosed.
In japanese kokai publication hei 6-123041 communique, such technology being disclosed: promptly, when the leading section of weft yarn receives the traction of initial injection fluid from pilot jet or after this, the expulsion pressure of main burner is switched to the technology of low pressure.
In japanese kokai publication hei 6-257034 communique, disclose between the injection period of real-time control main burner and pilot jet and the technology on injection opportunity.
In japanese kokai publication hei 8-74143 communique, the technology about the configuration of the shape of the weft yarn bullport that on stretch nozzle, forms and pilot jet is disclosed.
In japanese kokai publication hei 8-113850 communique, the lax technology that contact or clipping weft yarn draw-gear and the weft yarn between the main burner have appropriateness that is in that makes is disclosed.
In japanese kokai publication hei 11-12891 communique, the expulsion pressure that the makes main burner technology than the low certain pressure of expulsion pressure of pilot jet is disclosed.
As above-mentioned japanese kokai publication hei 6-123041 communique and japanese kokai publication hei 11-12891 communique are disclosed, make the expulsion pressure technology lower of main burner help stable picking than the expulsion pressure of pilot jet.
The application's inventor investigates the variation of the picking characteristic under the situation of the weft yarn transporting velocity of the weft yarn feed speed that changed main burner and pilot jet.The investigation result of the variation of this picking characteristic of the graphical representation of Figure 13.The transverse axis of upside is represented the expulsion pressure of pilot jet, and the longitudinal axis on right side is represented the expulsion pressure of main burner.The longitudinal axis in left side is represented average picking speed (traverse speed of weft yarn), and the transverse axis of downside is represented specific air consumption.Stain in the curve map is represented measured data.
Waveform V in the curve map of Figure 12 representes the expulsion pressure waveform of pilot jet.N1 in the curve map of Figure 13 representes that the ideal of present situation of weft yarn transporting velocity of weft yarn feed speed and the pilot jet of main burner sets.When thereby the expulsion pressure that improves main burner makes the picking characteristic when the state of N1 for example is changed to the state of N2 with the expulsion pressure that increases the weft yarn supply capacity and reduce pilot jet simultaneously to suppress the weft yarn conveying capacity, under the state of the lax increase of weft yarn, carry out picking.Can know that from the investigation result of Figure 13 suppress the weft yarn conveying capacity simultaneously if set increase weft yarn supply capacity with respect to the ideal of above-mentioned present situation, it is constant that then average picking speed keeps the ideal of above-mentioned present situation to set, and compares with present situation, can reduce specific air consumption.
Carry out under the situation of picking increasing the lax of weft yarn, will the expulsion pressure of pilot jet be set at the ideal that is lower than above-mentioned present situation to set, therefore, the average speed and the weft yarn transporting velocity of the air flow in the weft yarn path of navigation are roughly the same.The application's inventor finds, and is shown in figure 14 under this situation, from main burner 14 penetrate and in the weft yarn path of navigation bending amount of the leading section of the weft yarn Y the course of conveying significantly increase.Postpone the opportunity that the significantly increase of the bending amount of weft yarn leading section can cause the weft yarn front end to arrive picking terminal (braiding end), is easy to generate the picking mistake.
Summary of the invention
The objective of the invention is to realize that the stabilisation of picking further reduces specific air consumption simultaneously.
In order to achieve the above object, in a scheme of the present invention, provide a kind of aerojet that utilizes pilot jet to draw the weft yarn that penetrates from main burner and carry out the picking method the jet loom of picking.The picking method comprises the low-pressure state that the expulsion pressure in during the aerojet of above-mentioned pilot jet is switched to latter half from the high pressure conditions of first half.
In another scheme of the present invention, provide a kind of aerojet that utilizes pilot jet to draw the weft yarn that penetrates from main burner and carry out the weft insertion device the jet loom of picking.Weft insertion device comprises the first air supply source, the second air supply source, first transfer valve, second transfer valve and control part.The above-mentioned second air supply source has than the low air supply pressure of air supply pressure in the above-mentioned first air supply source.Above-mentioned first transfer valve can switch between following two states: allow from the above-mentioned first air supply source to the air fed supply condition of above-mentioned pilot jet with stop from the above-mentioned first air supply source to the air fed halted state of above-mentioned pilot jet.Above-mentioned second transfer valve can switch between following two states: allow from the above-mentioned second air supply source to the air fed supply condition of above-mentioned pilot jet with stop from the above-mentioned second air supply source to the air fed halted state of above-mentioned pilot jet.Above-mentioned control part is controlled the switching state of above-mentioned first transfer valve and second transfer valve so that the expulsion pressure in during the aerojet of above-mentioned pilot jet is switched to the mode of the low-pressure state of latter half from the high pressure conditions of first half.
In another scheme of the present invention, provide a kind of aerojet that utilizes pilot jet to draw the weft yarn that penetrates from main burner and carry out the weft insertion device the jet loom of picking.Weft insertion device comprises the first air supply source, the second air supply source, transfer valve and control part.Above-mentioned transfer valve can switch between following two states: allow from the above-mentioned first air supply source to the air fed supply condition of above-mentioned pilot jet with stop from the above-mentioned first air supply source to the air fed halted state of above-mentioned pilot jet.Above-mentioned control part during the aerojet of above-mentioned pilot jet in, be halted state with above-mentioned transfer valve from the supply condition switching controls.The above-mentioned second air supply source comprises: concubine forms device, forms the concubine that pressure accumulation is used; With air discrepancy path, make from the air feed path of above-mentioned transfer valve to above-mentioned pilot jet to be communicated with above-mentioned concubine.
Description of drawings
Figure 1A is the stereogram of the weft insertion device of first embodiment of the present invention.
Figure 1B is the figure of the sets of auxiliary blowers among Figure 1A.
Fig. 2 A is the sketch map of the weft insertion device among Figure 1A.
Fig. 2 B is the curve map of the expulsion pressure waveform of the sets of auxiliary blowers among expression Figure 1B.
Fig. 3 is the sequential chart that the expression transfer is sprayed.
Fig. 4 is the curve map of expression average air flow velocity with respect to the relation of the bending frequency of increase ratio, specific air consumption and the weft yarn leading section of weft yarn transporting velocity.
Fig. 5 is the figure of the state of walking of expression weft yarn.
Fig. 6 is the sketch map of the weft insertion device of second embodiment of the present invention.
Fig. 7 is the sectional view that the concubine of the weft insertion device in the presentation graphs 6 forms the major part of device 39.
Fig. 8 is expulsion pressure waveform and the curve map of the air pressure waveform in the concubine 391 of the sets of auxiliary blowers of the weft insertion device in the presentation graphs 6.
Fig. 9 be the air of the weft insertion device in the presentation graphs 6 come in and go out the spray-hole in long-pending divided by sets of auxiliary blowers one group of the passage sections in path the long-pending sectional area ratio that obtains in gross section, and the quality of the generation state of two stage expulsion pressure waveforms between the curve map of relation.
Figure 10 be the volume of concubine of the weft insertion device in the presentation graphs 6 divided by whole volumes of the feed path in a group of sets of auxiliary blowers and the volumetric ratio that obtains, and the quality of the generation state of two stage expulsion pressure waveforms between the curve map of relation.
Figure 11 is the sketch map of major part of the weft insertion device of expression other embodiment of the present invention.
Figure 12 is the curve map of the air injection pressure waveform in the past in the expression pilot jet.
Figure 13 is the curve map of the investigation result after expression is investigated the variation of the picking characteristic under the situation of the weft yarn transporting velocity of the weft yarn feed speed that changed main burner and pilot jet.
Figure 14 is the figure of the bending of expression weft yarn leading section.
The specific embodiment
Following first embodiment after according to Figure 1A～Fig. 5 explanation the present invention being specialized.
Shown in Fig. 2 A, label 11 is weft yarn length measuring weft storing devices of winding method, and the rotation through yarn coiling pipe 110 is wound on weft yarn Y on the yarn coiling face 111.The turnover of the card shotpin 121 through electromagnet 12 move control weft yarn from yarn coiling face 111 pull out, separate easypro.The excitation of electromagnet 12, demagnetization are carried out through the commands for controlling of control computer C, and control computer C separates excitation, the demagnetization that the inspection measurement information that relaxes is controlled electromagnet 12 according to the weft yarn of separating the detector 13 that relaxes from weft yarn.Weft yarn is separated the detector 13 that relaxes and is detected and be wound on easypro around separating of yarn on the yarn coiling face 111.
Shown in Figure 1A, be assemblied in injection air in the weft yarn path of navigation 371 of the stretch nozzle 37 of sets of auxiliary blowers 15 on slay 36 on the slay 36.Figure 1B illustrates sets of auxiliary blowers 15.Sets of auxiliary blowers 15 is from spray-hole 38 injection airs.
Shown in Fig. 2 A; In this embodiment; Use a plurality of sets of auxiliary blowers 15～18 (to be 8 groups in this embodiment; But only illustrate 4 groups), the weft yarn Y that pulls out and penetrate from yarn coiling face 111 by the jet action of main burner 14 then carries out the transfer aerojet of a plurality of sets of auxiliary blowers 15,16,17,18.Below, all sets of auxiliary blowers are designated as sets of auxiliary blowers 15～18.
Carrying out under the situation of picking well, in set loom rotation angle range, utilizing weft detector 19 to detect whether weft yarn Y is arranged.Be imported into control computer C from the weft yarn detection signal of weft detector 19, control computer C selects the running of loom some in continuing and stopping according to the weft yarn detection signal.
Electromagnetic opening and closing valve 21～24 is first transfer valves, between following two states, switches: allow from air service tank 30 to sets of auxiliary blowers 15～18 air fed supply conditions with stop from air service tank 30 to sets of auxiliary blowers 15～18 air fed halted states.
Electromagnetic opening and closing valve 25～27 is second transfer valves, between following two states, switches: allow from air service tank 31 to sets of auxiliary blowers 15～18 air fed supply conditions with stop from air service tank 31 to sets of auxiliary blowers 15～18 air fed halted states.
The open and close controlling of each electromagnetic opening and closing valve 20～28 is carried out through the instruction that comes Self Control computer C.The loom anglec of rotation detection information that control computer C obtains according to the rotary encoder 42 that detects usefulness from the loom anglec of rotation is controlled the switching of electromagnetic opening and closing valve 20～28.
Each air service tank 29,30,31 is connected with not shown first pressing case via pressure-control valve 43,44,45.Pressure-control valve 43 is regulated the pressure of air service tank 29.Pressure-control valve 44 is regulated the pressure of air service tank 30, and pressure-control valve 45 is regulated the pressure of air service tank 31.The pressure of air service tank 30 is set at the pressure that is higher than air service tank 31.
Fig. 3 illustrates the sequential chart of the expulsion pressure waveform of expression main burner 14 and sets of auxiliary blowers 15～18.Transverse axis express time T, the longitudinal axis represent by the front end in-position of the weft yarn of picking (picking position).Transverse axis loom the is rotated a circle angular range of a part of (scopes that degree in crank angle is 360 °) is replaced into time representation and obtains.
Curve M is represented the expulsion pressure waveform of main burner 14, and curve E1, E2, E3, E4, E5, E6, E7, E8 represent the expulsion pressure waveform of sets of auxiliary blowers 15～18.α represented to be wound on and ended the opportunity that effect begins to discharge around yarn from the card of card shotpin 121 on the yarn coiling face 111 opportunity, and opportunity, β represented to utilize card shotpin 121 to reel the opportunity that weft yarn card that face 111 pulls out ends from yarn.Line D representes an example of the state of walking of weft yarn Y.Below, curve E1～E8 is designated as expulsion pressure waveform E1～E8.
Aerojet to one group in the sets of auxiliary blowers 15～18 (for example sets of auxiliary blowers 15) describes.During T among Fig. 3 representes the excitation of electromagnetic opening and closing valve 21, be the aerojet of sets of auxiliary blowers 15 during.
Before the front end of weft yarn Y soon passed through the starting point of sets of auxiliary blowers 15, control computer C carried out excitation to electromagnetic opening and closing valve 21.Electromagnetic opening and closing valve 21 is become open mode by excitation, and the air of air service tank 30 is fed into sets of auxiliary blowers 15, and sets of auxiliary blowers 15 begins injection air with the pressure of air service tank 30.Expulsion pressure in the sets of auxiliary blowers 15 reaches the highest when starting point through sets of auxiliary blowers 15 of the front end of weft yarn Y.
F shown in Fig. 2 A is the path of walking of weft yarn Y.The picking position in zone (shown in the arrow R1) is pointed in the injection that the front end that L1 representes to envision weft yarn Y arrives the pilot jet 15A among the pilot jet 15A that constitutes sets of auxiliary blowers 15,15B, 15C, the 15D, is equivalent to the starting point of above-mentioned sets of auxiliary blowers 15.The front end that L2 representes to envision weft yarn Y arrives and points to the picking position in zone (shown in the arrow R2) from the injection of main burner 14 pilot jet 15D farthest among the pilot jet 15A that constitutes sets of auxiliary blowers 15,15B, 15C, the 15D, is equivalent to the terminal point of said nozzle group 15.
Waveform W in the curve map of Fig. 2 B representes the expulsion pressure waveform of sets of auxiliary blowers 15.γ is the opportunity that the front end of anticipation weft yarn Y arrives picking position L1, and δ is the opportunity that the front end of anticipation weft yarn Y arrives picking position L2.The expulsion pressure of sets of auxiliary blowers 15 from opportunity γ until opportunity δ equate with the pressure of air service tank 30.
, through behind the terminal point of sets of auxiliary blowers 15 that is, after the front end of weft yarn Y is through picking position L2, controls computer C electromagnetic opening and closing valve 21 is carried out demagnetization, and electromagnetic opening and closing valve 25 is carried out excitation at the front end of weft yarn Y.That is, the injection sensing region R 2 of the front end of control computer C and anticipation weft yarn Y through sets of auxiliary blowers 15 to pass through anticipation corresponding opportunity, electromagnetic opening and closing valve 21 is carried out demagnetization, and electromagnetic opening and closing valve 25 is carried out excitation.Electromagnetic opening and closing valve 21 is become closed condition by demagnetization, and electromagnetic opening and closing valve 25 is become open mode by excitation.When electromagnetic opening and closing valve 21 became closed condition, the expulsion pressure of sets of auxiliary blowers 15 reduced gradually, and when the expulsion pressure of sets of auxiliary blowers 15 becomes the pressure of air service tank 31 when following, check valve 35 is opened.Thus, the air of air service tank 31 supplies to sets of auxiliary blowers 15 via electromagnetic opening and closing valve 25, and sets of auxiliary blowers 15 is with the pressure injection air of air service tank 31.
Through during the aerojet during T, control computer C carries out demagnetization to electromagnetic opening and closing valve 25 when the excitation from electromagnetic opening and closing valve 21 begins.Electromagnetic opening and closing valve 25 is become closed condition by demagnetization, stop from air service tank 31 to sets of auxiliary blowers 15 air supplies, thereby the aerojet in the sets of auxiliary blowers 15 stops.
In other sets of auxiliary blowers 16～18 is also during the aerojet of each sets of auxiliary blowers 16～18, carry out same aerojet.
Control computer C is a control part; So that the expulsion pressure in during sets of auxiliary blowers 15～18 aerojet separately switches to the mode of the low-pressure state of latter half from the high pressure conditions of first half, the switching state of control electromagnetic opening and closing valve 21～24 and electromagnetic opening and closing valve 25～28.
When waveform portion E11, E21, E31, E41, E51, E61, E71, the E81 among expulsion pressure waveform E1～E8 representes that electromagnetic opening and closing valve 21～24 is in open mode, the air of air service tank 30 is fed into the expulsion pressure of sets of auxiliary blowers 15～18 o'clock.When waveform portion E12, E22, E32, E42, E52, E62, E72, the E82 among expulsion pressure waveform E1～E8 representes that electromagnetic opening and closing valve 25～28 is in open mode, the air of air service tank 31 is fed into the expulsion pressure of sets of auxiliary blowers 15～18 o'clock.Expulsion pressure during the aerojet in the sets of auxiliary blowers 15～18 in (in Fig. 3, only illustrate the aerojet of sets of auxiliary blowers 15 during T) switches between two stages to the low-pressure state of latter half from the high pressure conditions of first half.Expulsion pressure waveform E1, E2, E3, E4 are the two stage expulsion pressure waveforms that the low-pressure fuel injection by the high-pressure injection of first half and latter half constitutes.
The front end of sets of auxiliary blowers 15～18 and weft yarn Y to walk the position corresponding; The transfer of the two stage expulsion pressures that carry out being represented by nozzle exit pressure waveform E1～E8 is sprayed, and the weft yarn Y that penetrates from main burner 14 sprays by the transfer of above-mentioned two stage expulsion pressures and drawn towards the picking end side.
The number of the pilot jet that basis is connected with each electromagnetic valve during the high-pressure injection of first half (being 4 in this embodiment) changes.That is, the number of the pilot jet that is connected with each electromagnetic valve is few more, and is short more during the high-pressure injection, and the number of the pilot jet that is connected with each electromagnetic valve is many more, long more during the high-pressure injection.
In the first embodiment, can obtain following advantage.
When (1) improving the weft yarn supply capacity when the expulsion pressure that improves main burner 14, as shown in Figure 5, weft yarn Y can produce lax.But; Utilization with the aerojet in the sets of auxiliary blowers 15～18 during the aerojet of switching between two stages to the low-pressure state of latter half of expulsion pressure among the T from the high pressure conditions of first half; The pressure that makes the leading section of weft yarn Y be exposed to air service tank 30 is in the expulsion pressure of high pressure, as illustrated in fig. 5 elongation as the crow flies.During aerojet in the latter half of T, the expulsion pressure of sets of auxiliary blowers 15～18 become the air service tank 31 lower than the pressure of air service tank 30 pressure, be the expulsion pressure of low pressure.Therefore, can carry out stable picking, and can reduce specific air consumption.
(2) pressure in the high-pressure injection of sets of auxiliary blowers 15～18, be that the air pressure of air service tank 30 need be set at, make that the average air velocity ratio weft yarn transporting velocity in the weft yarn path of navigation 371 is fast.
Fig. 4 is that average air flow velocity in the expression weft yarn path of navigation 371 is with respect to the curve map of the relation of the bending frequency more than 90 ° of the relation of the increase ratio of weft yarn transporting velocity and specific air consumption and above-mentioned increase ratio and weft yarn leading section.Transverse axis is represented above-mentioned increase ratio, and the longitudinal axis in left side is represented above-mentioned bending frequency, and the longitudinal axis on right side is represented specific air consumption.Line Se representes the variation of specific air consumption, and line Ke representes the bending frequency.Straight line So representes the level of the specific air consumption of present situation, and straight line Ko representes the level of the bending frequency of present situation.
According to the curve map of Fig. 4, if the increase ratio in 10%～20% scope, then the weft yarn leading section to walk attitude good.Increase this scope height of ratio even make, the bending frequency of weft yarn leading section also changes hardly, and specific air consumption increases.
On the other hand; If with the pressure in the low-pressure fuel injection of sets of auxiliary blowers 15～18, be that the air pressure settings of air service tank 31 is 40%～60% a scope of the air pressure of air service tank 30; Then can realize the reduction of specific air consumption, and can carry out stable picking.If lower than this scope, then weft yarn Y walk stability variation gradually, if higher than this scope, then the reduction rate of specific air consumption reduces.
Like this; The aerojet flow velocity is set at; Make the speed of front end of the aerojet velocity ratio weft yarn Y under the high pressure conditions fast and make the speed of front end of the aerojet velocity ratio weft yarn Y under the low-pressure state slow; This setting make the weft yarn leading section to walk attitude good, and can reduce specific air consumption.
Then, second embodiment to Fig. 6～Figure 10 describes.The formation portion identical with first embodiment used identical label and omit detailed explanation.
As shown in Figure 6, in second embodiment, replace air service tank 31 and electromagnetic opening and closing valve 25～28 in first embodiment, and the concubine that uses pressure accumulation to use forms device 39.Concubine forms device 39 and is connected with feed path 33.
As shown in Figure 7; Concubine forms device 39 and possesses concubine 391 and the air path 40 of coming in and going out, concubine 391 via air come in and go out path 40 with more lean on the feed path 33 in downstream (between electromagnetic opening and closing valve 21～24 and the sets of auxiliary blowers 15～18) to be communicated with than electromagnetic opening and closing valve 21～24.Air discrepancy path 40 has throttling function.In this embodiment, come in and go out 0.5 times of summation of sectional area of the long-pending spray-hole 38 that is set at the one group of sets of auxiliary blowers that is connected with an electromagnetic opening and closing valve of the passage sections in path 40 of air.And in this embodiment, the volume settings of concubine 391 is 2 times of the volume of whole feed paths of linking to each other with the one group of sets of auxiliary blowers that is connected in an electromagnetic opening and closing valve.
The connection edge 401 that air discrepancy path 40 is connected with concubine 391 has been implemented the chamfering of circular shape, and the connection edge 402 that air discrepancy path 40 is connected with feed path 33 has been implemented the chamfering of circular shape.
Aerojet to one group in the sets of auxiliary blowers 15～18 (for example sets of auxiliary blowers 15) describes.
Before the front end of weft yarn Y soon passed through the starting point of sets of auxiliary blowers 15, control computer C carried out excitation to electromagnetic opening and closing valve 21.Electromagnetic opening and closing valve 21 is become open mode by excitation, and the air of air service tank 30 is fed into sets of auxiliary blowers 15, and sets of auxiliary blowers 15 begins injection air with the pressure of air service tank 30.The air of air service tank 30 also is fed into concubine 391 via air discrepancy path 40, and the pressure of concubine 391 rises.
After the front end of weft yarn Y passed through the terminal point of sets of auxiliary blowers 15, control computer C carried out demagnetization to electromagnetic opening and closing valve 21.Electromagnetic opening and closing valve 21 is become closed condition by demagnetization.When electromagnetic opening and closing valve 21 became closed condition, the expulsion pressure in the sets of auxiliary blowers 15 reduced gradually.Meanwhile, the air of concubine 391 is fed into sets of auxiliary blowers 15 via air discrepancy path 40, and the pressure of concubine 391 also begins to reduce gradually.Reduce midway at the expulsion pressure of sets of auxiliary blowers 15, become the pressure balance stage with the roughly the same pressure of the pressure of concubine 391 at the expulsion pressure of sets of auxiliary blowers 15, the expulsion pressure in the sets of auxiliary blowers 15 is temporarily passed with the pressure of constant.
Then, the air that remains in the concubine 391 ejects from sets of auxiliary blowers 15, and the air pressure of concubine 391 reduces, from the aerojet end of sets of auxiliary blowers 15.
Control computer C in second embodiment is following control part: in during the aerojet of sets of auxiliary blowers 15～18, be halted state with electromagnetic opening and closing valve 21～24 from the supply condition switching controls.
Waveform Po in the curve map of Fig. 8 representes the expulsion pressure waveform in the sets of auxiliary blowers 15, and the waveform Q in the curve map of Fig. 8 representes the air pressure waveform in the concubine 391.Can know from the curve map of Fig. 8, the rise time of the expulsion pressure in the sets of auxiliary blowers 15 and the situation of existing apparatus (with reference to Figure 12) much at one, spraying the rise time can be not elongated.On the other hand, through concubine 391 is set, make that the expulsion pressure in the sets of auxiliary blowers 15 is grown about 2 times than the situation (with reference to Figure 12) of existing apparatus fall time.
Sets of auxiliary blowers 16～18 for other is also carried out same aerojet.The front end of sets of auxiliary blowers 15～18 and weft yarn Y to walk the position corresponding and the transfers two stage expulsion pressures that carry out being represented by expulsion pressure waveform Po are sprayed, the weft yarn Y that penetrates from main burner 14 sprays quilt through the transfer of above-mentioned two stage expulsion pressures and is drawn towards the picking end side.
In second embodiment, can obtain following advantage.
(3) through concubine 391 is set, make that the expulsion pressure waveform in the sets of auxiliary blowers 15～18 becomes two stage expulsion pressure waveforms, same with the situation of first embodiment, not only can keep picking stable, and can significantly cut down specific air consumption.
(4) the curve G in the curve map of Fig. 9 represent air come in and go out the long-pending sectional area ratio that obtains in the long-pending gross section of passage sections in the path 40 divided by one group spray-hole 38 in the sets of auxiliary blowers 15～18, and the quality of the generation state of two stage expulsion pressure waveforms between relation.Transverse axis is represented the long-pending sectional area ratio that obtains in the long-pending gross section divided by spray-hole 38 of the passage sections in the air discrepancy path 40, and the longitudinal axis is represented the quality of the generation state of two stage expulsion pressure waveforms.Waveform P1, P2, P3 in the curve map representes that above-mentioned sectional area ratio is the example of the expulsion pressure waveform in the sets of auxiliary blowers 15～18 under the situation of g1, g2, g3.
When sectional area ratio is lower than 10%, generate two stage expulsion pressure waveforms hardly, the expulsion pressure waveform of sets of auxiliary blowers 15～18 does not almost have different with the situation that concubine 391 is not set.When sectional area ratio surpassed 100%, the rise time of the expulsion pressure of sets of auxiliary blowers 15～18 significantly increased, and can't carry out suitable picking.Therefore, if sectional area ratio is set in 10%～100% the scope, then can suitably generates and to guarantee stable picking, and can significantly reduce by two stage expulsion pressure waveforms of specific air consumption.
(5) the curve H in the curve map of Figure 10 represent volumetric ratio that the volume in the concubine 391 obtains divided by whole volumes of one group feed path in the sets of auxiliary blowers 15～18, and the quality of the generation state of two stage expulsion pressure waveforms between relation.Transverse axis is represented the volumetric ratio that the volume of concubine 391 obtains divided by whole volumes of above-mentioned feed path, and the longitudinal axis is represented the quality of the generation state of two stage expulsion pressure waveforms.Waveform P4, P5, P6 in the curve map representes that above-mentioned sectional area ratio is the example of the expulsion pressure waveform in the sets of auxiliary blowers 15～18 under the situation of h1, h2, h3.
When volumetric ratio is lower than 30%, generate two stage expulsion pressure waveforms hardly, the expulsion pressure waveform of sets of auxiliary blowers 15～18 does not almost have different with the situation that concubine 391 is not set.When volumetric ratio surpassed 350%, the force value of high pressure conditions significantly reduced, and can't carry out suitable picking.And when volumetric ratio surpassed 350%, than long during the required picking, the reduction effect of specific air consumption weakened during each aerojet in the sets of auxiliary blowers 15～18.
Therefore, if volumetric ratio is set in 30%～350% the scope, then can generates and to guarantee stable picking, and can significantly reduce by two stage expulsion pressure waveforms of specific air consumption.
(6) the air formation that connection edge 401,402 chamferings in path 40 form circular shape of coming in and going out can be reduced air flow connecting peeling off of edge 401,402 places, suppress the pressure loss.
(7) reduce half because the number of electromagnetic opening and closing valve, pressure-control valve and air service tank is compared with the situation of first embodiment, and do not need check valve, therefore can significantly cut down initial cost.
In the present invention, also can be following embodiment.
Also can be shown in figure 11, on the air that connects concubine formation device 39 and feed path 33 is come in and gone out the path, variable restrictor mechanism 41 is set.Like this, can change the value of the low-pressure fuel injection pressure in the two stage expulsion pressure waveforms simply.
Also can adopt the concubine of the variable volume that can make concubine to form device 39.Like this, can change the fall time of the low-pressure fuel injection pressure in the pilot jet simply.
In the first embodiment; Also can separate the inspection measurement information that relaxes around what the easypro weft yarn of separating of yarn separated that the detector 13 that relaxes obtains around yarn on the yarn coiling face 111 according to being wound on by detection; That grasps the weft yarn front end walks position (picking position); And according to this grasp result, the switching opportunity of control electromagnetic opening and closing valve 21～24 and electromagnetic opening and closing valve 25～28.
In second embodiment; Also can separate the inspection measurement information that relaxes around what the easypro weft yarn of separating of yarn separated that the detector 13 that relaxes obtains around yarn on the yarn coiling face 111 according to being wound on by detection; That grasps the weft yarn front end walks position (picking position); And according to this grasp result, the switching opportunity of control electromagnetic opening and closing valve 21～24.
Claims (8)
1. the picking method in the jet loom is utilized the aerojet of pilot jet to draw the weft yarn that penetrates from main burner and is carried out picking, it is characterized in that,
This picking method comprises the low-pressure state that the expulsion pressure in during the aerojet of above-mentioned pilot jet is switched to latter half from the high pressure conditions of first half.
2. picking method according to claim 1 is characterized in that,
The speed of the front end of the above-mentioned weft yarn of aerojet velocity ratio in the above-mentioned high pressure conditions is fast, and the speed of the front end of the above-mentioned weft yarn of aerojet velocity ratio in the above-mentioned low-pressure state is slow.
3. the weft insertion device in the jet loom utilizes the aerojet of pilot jet to draw the weft yarn that penetrates from main burner and carries out picking, it is characterized in that,
This weft insertion device possesses:
The first air supply source;
The second air supply source has than the low air supply pressure of air supply pressure in the above-mentioned first air supply source;
First transfer valve can switch between following two states: allow from the above-mentioned first air supply source to the air fed supply condition of above-mentioned pilot jet with stop from the above-mentioned first air supply source to the air fed halted state of above-mentioned pilot jet;
Second transfer valve can switch between following two states: allow from the above-mentioned second air supply source to the air fed supply condition of above-mentioned pilot jet with stop from the above-mentioned second air supply source to the air fed halted state of above-mentioned pilot jet; And
Control part so that the expulsion pressure in during the aerojet of above-mentioned pilot jet is switched to the mode of the low-pressure state of latter half from the high pressure conditions of first half, is controlled the switching state of above-mentioned first transfer valve and second transfer valve.
4. weft insertion device according to claim 3 is characterized in that,
Above-mentioned control part is corresponding through the opportunity in the injection sensing zone of above-mentioned pilot jet with the front end of the above-mentioned weft yarn of anticipation, above-mentioned first transfer valve is switched to halted state from supply condition, and above-mentioned second transfer valve is switched to supply condition from halted state.
5. the weft insertion device in the jet loom utilizes the aerojet of pilot jet to draw the weft yarn that penetrates from main burner and carries out picking, it is characterized in that,
This weft insertion device possesses:
The first air supply source;
The second air supply source;
Transfer valve can switch between following two states: allow from the above-mentioned first air supply source to the air fed supply condition of above-mentioned pilot jet with stop from the above-mentioned first air supply source to the air fed halted state of above-mentioned pilot jet; And
Control part, during the aerojet of above-mentioned pilot jet in, be halted state with above-mentioned transfer valve from the supply condition switching controls,
The above-mentioned second air supply source comprises: concubine forms device, forms the concubine that pressure accumulation is used; With air discrepancy path, will be communicated with above-mentioned concubine from the air feed path of above-mentioned transfer valve to above-mentioned pilot jet.
6. weft insertion device according to claim 5 is characterized in that,
The passage sections in above-mentioned air discrepancy path is amassed and is 10%～100% of the long-pending summation of the passage sections of the spray-hole of above-mentioned pilot jet.
7. weft insertion device according to claim 5 is characterized in that,
The volume of above-mentioned concubine be above-mentioned air feed path whole path volumes 30%～350%.
8. according to each the described weft insertion device in the claim 3～7, it is characterized in that,
Above-mentioned weft insertion device possesses the weft yarn path of navigation, and this weft yarn path of navigation supplies to pass through from the weft yarn that above-mentioned main burner penetrates,
Average air flow velocity in the formed above-mentioned weft yarn path of navigation of air that penetrates from above-mentioned pilot jet is 10%～20% scope with respect to the increase ratio of weft yarn transporting velocity, and the pressure in the low-pressure fuel injection is 40%～60% scope of the pressure in the high-pressure injection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008163340 | 2008-06-23 | ||
| JP2008-163340 | 2008-06-23 | ||
| JP2008163340A JP5027064B2 (en) | 2008-06-23 | 2008-06-23 | Weft insertion method in jet loom |
Publications (2)
| Publication Number | Publication Date |
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| CN101613903A CN101613903A (en) | 2009-12-30 |
| CN101613903B true CN101613903B (en) | 2012-03-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200910150339 Expired - Fee Related CN101613903B (en) | 2008-06-23 | 2009-06-23 | Picking method and picking apparatus in jet weaving machine |
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| JP (1) | JP5027064B2 (en) |
| CN (1) | CN101613903B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5901031B2 (en) * | 2010-11-25 | 2016-04-06 | ウステル・テヒノロジーズ・アクチエンゲゼルシヤフト | Method and apparatus for controlling a jet loom |
| JP5544313B2 (en) * | 2011-01-13 | 2014-07-09 | 津田駒工業株式会社 | Weaving method in air jet loom |
| CN102493103A (en) * | 2011-12-15 | 2012-06-13 | 江苏万工科技集团有限公司 | Weft insertion flow field forming system |
| JP5958296B2 (en) * | 2012-11-16 | 2016-07-27 | 株式会社豊田自動織機 | Compressed air flow rate display device for air jet loom |
| CN103409891A (en) * | 2013-08-16 | 2013-11-27 | 青岛奥海纺机制造有限公司 | Air jet loom |
| JP6172186B2 (en) * | 2015-03-17 | 2017-08-02 | 株式会社豊田自動織機 | Weft insertion control method for air jet loom and weft insertion device for air jet loom |
| JP7388322B2 (en) * | 2020-09-07 | 2023-11-29 | 株式会社豊田自動織機 | Air jet loom weft insertion device |
| JP7489003B2 (en) * | 2021-01-29 | 2024-05-23 | 株式会社豊田自動織機 | Air jet weaving machine weft insertion device |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2010001591A (en) | 2010-01-07 |
| JP5027064B2 (en) | 2012-09-19 |
| CN101613903A (en) | 2009-12-30 |
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