CN102409469B - Weft insertion apparatus in jet loom - Google Patents
Weft insertion apparatus in jet loom Download PDFInfo
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- CN102409469B CN102409469B CN201110270922.0A CN201110270922A CN102409469B CN 102409469 B CN102409469 B CN 102409469B CN 201110270922 A CN201110270922 A CN 201110270922A CN 102409469 B CN102409469 B CN 102409469B
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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
- D03D47/3006—Construction of the nozzles
- D03D47/302—Auxiliary nozzles
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Abstract
A weft insertion apparatus in a jet loom, wherein the weft insertion apparatus includes an auxiliary nozzle (21) for weft insertion having an injection hole (23) from which air jet is ejected to deliver a weft (Y) in a weft guiding passage (14), is provided. The injection hole (23) is tapered so that the cross-sectional area of the hole (23) is decreased toward the direction of air injection of the auxiliary nozzle (21). The ratio A of a tapered angle gamma of the injection hole (23) to a processing deflection angle beta of the injection hole (23), gamma/beta= A, has the relationship expressed by an inequality (1): A is not less than A0..., wherein A0 is the value of gamma/beta when the variation range (Delta'delta max) of the jet deflection angle (delta) becomes 0 when the injection pressure of the auxiliary nozzle (21) is changed from the maximum pressure (Pmax) for weft insertion to the minimum pressure (Pmin) for weft insertion.
Description
Technical field
The present invention relates to the weft inserting apparatus in a kind of jet loom, wherein said weft inserting apparatus comprises the wefting insertion pilot jet with spray-hole, sprays air to carry the weft yarn in weft yarn guiding channel from spray-hole.
Background technology
As the wefting insertion of Fig. 9 (a), Fig. 9 (b) and Fig. 9 (c) shown type points to weft yarn guiding channels 14 with the spray-hole 111 of pilot jet 11, weft yarn guiding channel 14 is formed by the array that is formed on the weft yarn bullport 131 in the dent 13 of stretch nozzle 12.The time for spraying at pilot jet 11 places mates with walking of the weft yarn Y walking in weft yarn guiding channel 14 constantly.Weft yarn Y in weft yarn guiding channel 14 is transported to wefting insertion end by the air jet action from spray-hole 111.Reference marker T is warp thread.
In nozzle, to as shown in the waveform Np in the curve map by Fig. 3, be changed by the internal pressure (being the air pressure of pilot jet 11 inside) of the air spraying from spray-hole 111.
In Japanese Laid-Open Patent Publication No.3-97939, disclosed wefting insertion is with in pilot jet, and shown in the spray-hole 111 of Fig. 9 (c), nozzle bore (spray-hole) is taper, so that the direction that the sectional area in hole sprays towards air reduces.
Present inventor has carried out an experiment, so that in the situation that the relation table between vertex angle theta and processing deviation angle ψ is shown θ/2=1.3 * ψ in being disclosed in the tapered injection perforation 111 in Japanese Laid-Open Patent Publication No.3-97939, the variation of spraying deviation angle δ while observing the internal pressure when change nozzle.As shown in Figure 9 (c), processing deviation angle ψ is the angle between wefting insertion direction Lo and the axis of spray-hole 111 when the bearing of trend along stretch nozzle 12 is observed, and injection deviation angle δ is the angle between wefting insertion direction Lo and air injection direction line C when bearing of trend observation along stretch nozzle 12.Air injection direction line C refers to the line that is shown in the direction of expulsion pressure maximum in air injection.Air injection direction line C is not consistent with the axis 112 of spray-hole 111.As described below, the direction C that air sprays or injection deviation angle δ change according to the internal pressure of nozzle.
In order to measure air injection direction line C, for example, use in Japanese Laid-Open Patent Publication No.9-176937 disclosed for measuring the measurement device of air injection direction.
Figure 10 means the curve map of experimental result.Abscissa in Figure 10 represents the internal pressure of nozzle, and ordinate represents to spray the variation △ δ of deviation angle δ.The axis 112 of the spray-hole 111 of frusto-conical is the axis with the circular cone of vertex angle theta, and wherein circular cone forms by extending the bus (side line) of frustum of a cone.In the curve map of Figure 10, the injection deviation angle δ when internal pressure of nozzle is Pmax is expressed as 0 ° of ordinate place.Curve △ δ represents to spray the variation that deviation angle δ changes with respect to nozzle interior pressure, that is, when nozzle interior pressure declines from Pmax, spray deviation angle δ and how based on Pmax, to change.As apparent from curve △ δ, when nozzle interior pressure is wefting insertion use minimum pressure Pmin, sprays deviation angle δ and change (that is, air sprays the direction moving away from reed) along negative direction.
Wefting insertion refers to that with minimum pressure Pmin the air jet from pilot jet 11 arrives the needed minimum pressure of weft yarn guiding channel 14 can define the mode of the air injection direction line C in air jet.At the pressure place that is less than minimum pressure Pmin, from the air of pilot jet 11, be injected in and arrive diffusion before weft yarn guiding channel 14, thereby can not provide effective tractive force to weft yarn Y.
According to the curve map of Figure 10, when nozzle interior pressure drops to minimum pressure Pmin from maximum pressure Pmax, spray deviation angle δ and change along negative direction.Therefore, air injection direction line C more may upwards depart from from weft yarn guiding channel 14.When the maximum pressure Pmax(of nozzle interior pressure or the supply air pressure to the air tank of pilot jet 11) set lowlyer during with minimizing air consumption, reduced the tractive force of pilot jet 11.Therefore, complete while spraying from the air of pilot jet 11 after the end at weft yarn Y is by pilot jet 11, the variation △ δ that sprays deviation angle δ becomes remarkable to the negative effect of walking position of weft yarn Y.
Summary of the invention
The object of this invention is to provide a kind of wefting insertion pilot jet, even when the pressure setting in the air tank of pilot jet supply air must lowlyer spray intensity with minimizing air, also guarantee that with high reliability air injection direction remains in weft yarn guiding channel.
According to an aspect of the present invention, provide the weft inserting apparatus in a kind of jet loom.Weft inserting apparatus comprises the pilot jet 21 for wefting insertion with spray-hole 23, sprays air to carry the weft yarn Y in weft yarn guiding channel 14 from this spray-hole.Spray-hole 23 is tapers, so that the sectional area in hole 23 reduces towards the air injection direction of pilot jet 21.The ratio A of the processing deviation angle β of the bevel angle γ of spray-hole 23 and spray-hole 23, γ/β=A, has the relation being represented by inequality (1):
A≥A0 …（1）
Wherein A0 is when the expulsion pressure of pilot jet 21 is changed to minimum pressure for wefting insertion (Pmin) from maximum pressure for wefting insertion (Pmax), and the excursion (△ δ max) of spraying the deviation angle (δ) becomes the value of the γ/β of 0 o'clock.
In one embodiment, ratio A is 2.5 or larger.
In another embodiment, ratio A is 3 or larger.
In yet another embodiment, ratio A is 4.5 or less.
In another embodiment, spray-hole is the shape of frustum of a cone.
When using in this article, wefting insertion refers to the maximum of nozzle interior pressure with maximum pressure.
Wefting insertion refers to that with minimum pressure the air jet from pilot jet arrives the needed minimum pressure of weft yarn guiding channel can define the mode of the air injection direction in air jet.
Bevel angle γ is defined as the angle between the bus of spray-hole and the axis of spray-hole.
Accompanying drawing explanation
Fig. 1 (a) is for representing the front view of a part for pilot jet and a part for stretch nozzle for wefting insertion according to an embodiment of the invention;
The cutaway view that Fig. 1 (b) is Fig. 1 (a) of cutting open along line 1b-1b;
The partial side view that Fig. 2 (a) is pilot jet;
The cutaway view that Fig. 2 (b) is Fig. 2 (a) of cutting open along line 2b-2b;
The cutaway view that Fig. 2 (c) is Fig. 2 (b) of cutting open along line 2c-2c;
Fig. 3 is for representing the curve map of the variation of nozzle interior pressure;
Fig. 4 is for representing the curve map of the relation between nozzle interior pressure and the variation of jet angle of sprinkler flow;
Fig. 5 is for representing the curve map of the relation between nozzle interior pressure and the variation of the injection deviation angle;
Fig. 6 is the curve map of the relation between expression ratio A and the excursion of jet angle of sprinkler flow;
Fig. 7 is the curve map of the relation between expression ratio A and the excursion of spraying the deviation angle;
Fig. 8 (a) is for representing the partial sectional view of a part for pilot jet and a part for stretch nozzle for wefting insertion;
Fig. 8 (b) is the curve map of the intersection point on imaginary plane;
The side view that Fig. 9 (a) is weft inserting apparatus;
Fig. 9 (b) is the partial side view of Fig. 9 (a);
The cutaway view that Fig. 9 (c) is Fig. 9 (b) of cutting open along line 9c-9c; And
Figure 10 is for representing to spray the curve map of the variation of the deviation angle when ratio A is 1.3.
The specific embodiment
With reference to Fig. 1 to Fig. 8, embodiments of the invention are described.Comprise that wefting insertion is identical with the structure in Fig. 9 by the overall structure of the weft inserting apparatus of pilot jet.
Fig. 1 (a) is the front view of wefting insertion by a part for pilot jet 21 and a part for stretch nozzle 12.The cutaway view that Fig. 1 (b) is Fig. 1 (a) of cutting open along line 1b-1b.Fig. 2 (a) is the side view of the end of pilot jet 21.When observing along wefting insertion direction Lo, the end of pilot jet 21 is circular or arc.The cutaway view that Fig. 2 (b) is Fig. 2 (a) of cutting open along line 2b-2b.The cutaway view that Fig. 2 (c) is Fig. 2 (b) of cutting open along line 2c-2c.
As shown in Fig. 2 (b), wefting insertion is that end tubulose and pilot jet 21 seals with pilot jet 21.The terminal part of pilot jet 21 becomes less, so that pilot jet 21 upwards becomes less along the width of wefting insertion direction Lo.Terminal part at pilot jet 21 is formed with tabular par 22.The outer surface 221 of par 22 is a little upwards towards with towards wefting insertion direction Lo.Outer surface 221 is parallel with the direction that each warp thread T extends.
As shown in Fig. 2 (b) and Fig. 2 (c), par 22 comprises the spray-hole 23 being communicated with air feed passage 211 in pilot jet 21.Spray-hole 23 is configured to taper, and the direction that the sectional area of its mesopore sprays towards air reduces.That is to say, spray-hole 23 is Frusto-conical holes.Circular cone forms by extending the bus (side line) of the frustum of a cone of spray-hole 23, and the axis 231 of circular cone (or spray-hole 23) tilts with respect to reference line L1, and this reference line L1 is perpendicular to the axis 212 of the pilot jet 21 of tubulose.
As shown in Fig. 2 (b), the viewpoint definition between reference line L1 and axis 231 is for being shown in Fig. 9 (a) when the fore-and-aft direction along loom and with stretch nozzle 12() the vertical direction observation of bearing of trend time processing angle of elevation alpha.Axis 231 a little upwards towards.Inconsistent from injection direction and the axis 231 of the air of spray-hole 23 actual ejection.Therefore, jet angle of sprinkler flow ε is inconsistent with processing angle of elevation alpha.
As shown in Figure 2 (c), processing deviation angle β is defined as wefting insertion direction Lo(direction from left to right in the accompanying drawings, as the wefting insertion direction along Fig. 9) and axis 231 between angle.Similar to the relation between processing angle of elevation alpha and jet angle of sprinkler flow ε, spray deviation angle δ inconsistent with processing deviation angle β.
By extending the bevel angle of the circular cone that the bus (side line) of the frustum of a cone of spray-hole 23 forms, be defined as the angle γ between round element of a cone and axis 231.
In this embodiment, ratio A is that the value of γ/β is set to 3.6.Curve E0 in the curve map of Fig. 4 represents the variation △ ε that jet angle of sprinkler flow ε changes with respect to nozzle interior pressure when ratio A is 3.6.As shown in Fig. 2 (b), jet angle of sprinkler flow ε is when observing the angle between space-time gas jet direction line C and reference line L1 along wefting insertion direction Lo.In order to measure air injection direction line C, for example, use as disclosed for measuring the measurement device of air injection direction in Japanese Laid-Open Patent Publication No.9-176937.
Curve E1 represents the variation △ ε that jet angle of sprinkler flow ε changes with respect to nozzle interior pressure when ratio A is 1.3.Abscissa represents nozzle interior pressure, and ordinate represents the variation △ ε of jet angle of sprinkler flow ε.In this curve map, the jet angle of sprinkler flow when nozzle interior pressure is Pmax is expressed as 0 ° of ordinate place.The △ ε > 0 that just changes of jet angle of sprinkler flow ε is the situation that jet angle of sprinkler flow is directed upwards towards more than air injection direction line C when nozzle interior pressure is maximum pressure Pmax.
As the comparison between curve E0 and curve E1, and apparent, the just variation △ ε > 0 of jet angle of sprinkler flow ε is that 3.6 o'clock ratios are less when ratio A is 1.3 at ratio A.That is to say, the amplitude that the situation that air injection direction line C is maximum pressure Pmax from nozzle interior pressure upwards changes ratio A be 3.6 o'clock than at ratio A, be 1.3 o'clock less.This just means that 3.6 ratio A is more preferred than 1.3 ratio A, to stop air injection direction line C upwards to depart from from weft yarn guiding channel 14.
Curve D o in the curve map of Fig. 5 is the variation △ δ changing with respect to nozzle interior pressure as injection deviation angle δ that ratio A is 3.6 space-time gas jets.Spray deviation angle δ and be when bearing of trend observation along stretch nozzle 12 (seeing Fig. 9 (a)) air injection direction line C as shown in Figure 2 (c) and the angle between wefting insertion direction Lo.Curve D 1 is when ratio A is 1.3, to spray the variation △ δ that deviation angle δ changes with respect to nozzle interior pressure.Abscissa represents nozzle interior pressure, and ordinate represents to spray the variation △ δ of deviation angle δ.
In this curve map, injection deviation angle δ when nozzle interior pressure is Pmax is expressed as 0 ° of ordinate place.The just variation of spraying deviation angle δ, △ δ > 0, means that air injection direction line C more approaches stretch nozzle 12 than when nozzle interior pressure is maximum pressure Pmax.The negative variation of spraying deviation angle δ, △ δ < 0, means that air injection direction line C is than moving further from stretch nozzle 12 ground when nozzle interior pressure is maximum pressure Pmax.When spraying the negative variation △ δ < 0 of the deviation angle δ when larger, air injection direction line C moves away from the weft yarn guiding channel 14 of stretch nozzle 12 to a greater degree.
As the comparison between curve D 0 and curve D 1 and apparent, the variation △ δ that sprays deviation angle δ ratio A be 3.6 o'clock always positive, and along with nozzle interior pressure diminishes, the value that changes △ δ becomes large.When ratio A is 1.3, the variation △ δ that sprays deviation angle δ is positive in high-pressure side, but bears in low-pressure side.Because air injection direction line C is directed upwards towards, so if air injection direction line C moves away from stretch nozzle 12, the variation △ δ that sprays deviation angle δ more may upwards depart from from weft yarn guiding channel 14.
The graphical representation of Fig. 5 is when nozzle interior pressure is during in low-pressure side, air injection direction line C from weft yarn guiding channel 14 depart from ratio A be 3.6 o'clock than more not occurring when ratio A is 1.3.
Curve Z in the curve map of Fig. 6 represent jet angle of sprinkler flow ε with respect to the variation of ratio A the excursion △ ε max between maximum pressure Pmax and minimum pressure Pmin.Excursion △ ε max is the variation of jet angle of sprinkler flow ε when nozzle interior pressure drops to wefting insertion with minimum pressure Pmin from wefting insertion with maximum pressure Pmax.Preferably, minimum pressure Pmin can utilized as being set as alap pressure in the disclosed scope of measuring air injection direction line C for measuring the measurement device of air injection direction in Japanese Laid-Open Patent Publication No.9-176937.Abscissa represents ratio A, and ordinate represents the excursion △ ε max of jet angle of sprinkler flow ε.According to curve Z, ratio A is larger, and the excursion △ ε max of jet angle of sprinkler flow ε just becomes less.The ratio A that this means larger value is preferred, to stop air injection direction line C upwards to depart from from weft yarn guiding channel 14.
Curve H in the curve map of Fig. 7 represents to spray deviation angle δ with respect to the excursion △ δ max of the variation of ratio A.Excursion △ δ max is the variation of spraying deviation angle δ when nozzle interior pressure drops to wefting insertion with minimum pressure Pmin from wefting insertion with maximum pressure Pmax.Abscissa represents ratio A, and ordinate represents to spray the excursion △ δ max of deviation angle δ.The positive excursion of spraying deviation angle δ, △ δ max > 0, means with the situation when nozzle interior pressure is maximum pressure Pmax and compares, and air injection direction line C more approaches stretch nozzle 12.The negative excursion of spraying deviation angle δ, △ δ max < 0, means with the situation when nozzle interior pressure is maximum pressure Pmax and compares, and air injection direction line C moves further from stretch nozzle 12 ground.
As from curve H and apparent, when ratio A is 2 or more hour, the excursion △ δ max that sprays deviation angle δ bears.At ratio A, be 2 or less in the situation that, ratio A is less, the negative excursion (△ δ max < 0) of spraying deviation angle δ just becomes larger.Along with spraying the negative excursion (△ δ max < 0) of deviation angle δ, become large, air injection direction line C moves stretch nozzle 12 further away from each other.Because air injection direction line C is towards top, if air injection direction line C moves away from stretch nozzle 12, air injection direction line C more may upwards depart from from weft yarn guiding channel 14 so.
If the ratio when excursion △ δ max that sprays deviation angle δ when nozzle interior pressure when maximum pressure Pmax is changed to minimum pressure Pmin is become to 0 is defined as A0, when ratio A is A0 or when larger, the excursion △ δ max that sprays deviation angle δ is positive.In the situation that ratio A is A0 or larger value, along with ratio, A is larger, and the positive excursion (δ max > 0) of spraying deviation angle △ δ becomes larger.The situation that positive excursion (the δ max > 0) expression of spraying deviation angle △ δ is maximum pressure Pmax with nozzle interior pressure is compared, the situation of the more close stretch nozzle 12 of air injection direction line C.Because processing angle of elevation alpha is towards top, so along with air injection direction line C approaches stretch nozzle 12, air injection direction line C becomes lower.Therefore, along with air injection direction line, C approaches stretch nozzle 12, and jet angle of sprinkler flow ε is cancelled in the variation of upward direction, to promote the location of air injection direction line C in weft yarn guiding channel 14.
The value of A0 is greater than 2 and is still less than 2.5, and in this embodiment, A0 is 2.2.As apparent from Fig. 7, when ratio A > A0, the excursion △ δ max that sprays deviation angle δ is always positive.Therefore, by determining that processing deviation angle β and bevel angle γ make ratio A be equal to or greater than ratio A0, even if make when nozzle interior pressure becomes minimum pressure Pmin, the excursion △ δ max that sprays deviation angle δ can not become negative yet, thereby promotes the location of air injection direction line C in weft yarn guiding channel 14.
When positive excursion (△ δ max > 0) is larger, air injection direction line C declines, and has promoted the location of air injection direction line C in weft yarn guiding channel 14.Therefore, when ratio A is 3, compare with the situation that ratio A is 2.5, air injection direction line C is more easily positioned in weft yarn guiding channel 14.
If ratio A surpasses 3.6, the increment of so positive excursion (△ δ max > 0) becomes less.When ratio A is 4.5, positive excursion △ δ max > 0 is almost stable.When processing deviation angle β is constant, ratio A is less, and bevel angle γ is less.When bevel angle γ more hour, more easily process spray-hole 23.Therefore, 4.5 or less ratio A expect.
As shown in Figure 8 (a), the intersection point and between the isoplanar imaginary plane 142 of the rear surface 141 of weft yarn guiding channel 14 and the air injection direction line C of the air that sprays from spray-hole 111 is defined as Cn.
Fig. 8 (b) for be illustrated in ratio A be 1.3,2,2.5,3 and 3.6 situations under, the curve map of the variation of intersection point Cn when the nozzle interior pressure as shown in the waveform Np as Fig. 3 is changed to wefting insertion use minimum pressure Pmin from wefting insertion with maximum pressure Pmax.Abscissa x represents wefting insertion direction Lo, and ordinate y represents upward direction.X-y coordinate plane represents imaginary plane 142.
When nozzle interior pressure is maximum pressure Pmax, in the situation that ratio A is 1.3,2,2.5,3 and 3.6, the position of intersection point Cn becomes almost identical.Therefore, this intersection point is expressed as Co jointly.
Intersection point C0 and C1 are the variations of intersection point when ratio A is 1.3.Intersection point C0 and C2 are the variations of intersection point when ratio A is 2.Intersection point C0 and C3 are the variations of intersection point when ratio A is 2.5.Intersection point C0 and C4 are the variations of intersection point when ratio A is 3.Intersection point C0 and C5 are the variations of intersection point when ratio A is 3.6.
Intersection point C0 is the intersection point when nozzle interior pressure is maximum pressure Pmax.Intersection point C1, C2, C3, C4 and C5 are the intersection points when nozzle interior pressure is minimum pressure Pmin.
When ratio A is 1.3, intersection point C1 upwards departs from from rear surface 141.
When ratio A is 2, near the upper limb 143 of intersection point C2 in rear surface 141.
When ratio A is 2.5, intersection point C0 and C3 are in rear surface 141.
When ratio A is 3, intersection point C0 and C4 are in rear surface 141.
When ratio A is 3.6, intersection point C0 and C5 are in rear surface 141.
In the situation that intersection point Cn upwards departs from from rear surface 141, in the locational negative effect of walking of weft yarn Y, become significantly, and decline and the wefting insertion failure of weft yarn traverse speed may occur.When ratio A is 2, near the upper limb 143 of intersection point C2 in rear surface 141, and when ratio A is 2.5, intersection point C3 is in rear surface 141.That is to say, when ratio A is 2.5, with high reliability, stop intersection point Cn upwards to depart from from rear surface 141.
When ratio A is 3, intersection point C0 and C4 are positioned in rear surface 141.Therefore,, when ratio A is 3.0, with higher reliability, stop intersection point Cn upwards to depart from from rear surface 141.
When ratio A is 3, intersection point C4 is positioned at upper limb 143 inner sides of rear surface 141.When ratio A is 3.6, intersection point C5 is positioned at than intersection point C4 (or lower) more in the inner part.That is to say, when ratio A is 3.6, with even higher reliability, stop intersection point Cn upwards to depart from from rear surface 141.
Above-described embodiment has advantages of following.
(1) as shown in Figure 7, when A0 sprays for carry out air at pilot jet 21 places when nozzle interior pressure is changed to minimum pressure Pmin from maximum pressure Pmax, the value of the γ/β when the excursion △ δ max of injection deviation angle δ becomes 0.The value of A0 is greater than 2 and is still less than 2.5.When ratio A is greater than the value of A0, the excursion △ δ max that sprays deviation angle δ is positive.At excursion △ δ max be positive in the situation that, even when when air spray end place nozzle interior pressure is changed to minimum pressure Pmin from maximum pressure Pmax, air injection direction line C also approaches stretch nozzle 12, and the impact causing due to the increase of the variation △ ε of the jet angle of sprinkler flow ε shown in Fig. 4 is cancelled.Therefore reduced the possibility that air injection direction line C upwards departs from from weft yarn guiding channel 14.
Therefore, meet the inequality of ratio A:
γ/β= A ≥ A0
Wefting insertion with pilot jet 21, reduced the possibility that the air injection direction line C of the air spraying from spray-hole 23 departs from from weft yarn guiding channel 14 due to the decline of nozzle interior pressure.
(2) the excursion △ δ max of the injection deviation angle δ when ratio A is 2.5 is greater than the excursion △ δ max of the injection deviation angle δ when ratio A is A0.Nozzle interior pressure when the air at pilot jet 21 places has sprayed is lower than wefting insertion minimum pressure Pmin, and air injection direction line C is measurable under this minimum pressure.When ratio is A0, when nozzle interior pressure becomes lower than minimum pressure Pmin, the excursion △ δ max that sprays deviation angle δ may become negative.A be 2.5 or larger formation promote air injection direction line C with high reliability the location in weft yarn guiding channel 14.
(3) the excursion △ δ max of the injection deviation angle δ when ratio A is 3 is greater than the excursion △ δ max of the injection deviation angle δ in the situation that ratio A is 2.5.Thereby, A be 3 or larger formation promote air injection direction line C with higher reliability the location in weft yarn guiding channel 14.
(4), even when ratio A is greater than 4.5, positive excursion △ δ max keeps almost stable.Conventionally, spray-hole 23 is formed by spark machined.When processing deviation angle β is constant, ratio A is less, and bevel angle γ is less.When bevel angle γ more hour, more easily process spray-hole 23.Therefore, A be 4.5 or less being configured be beneficial to the processing that promotes spray-hole 23.
Present invention may also be embodied in the following examples.
Spray-hole can be the hole of the shape of butt elliptic cone.
Claims (5)
1. the weft inserting apparatus in a jet loom, wherein said weft inserting apparatus comprises the have spray-hole pilot jet for wefting insertion (21) of (23), from described spray-hole, spray air to carry the weft yarn (Y) in weft yarn guiding channel (14), wherein said spray-hole (23) is taper, so that the sectional area of described hole (23) reduces towards the air injection direction of pilot jet (21), it is characterized in that, the ratio A of the processing deviation angle β of the bevel angle γ of described spray-hole (23) and described spray-hole (23), γ/β=A, there is the relation being represented by inequality (1):
A≥A0 …（1）
Wherein A0 is when the expulsion pressure of described pilot jet (21) is changed to minimum pressure for wefting insertion (Pmin) from maximum pressure for wefting insertion (Pmax), and the excursion (△ δ max) of spraying the deviation angle (δ) becomes the value of the γ/β of 0 o'clock.
2. weft inserting apparatus according to claim 1, wherein said ratio A is 2.5 or larger.
3. weft inserting apparatus according to claim 1, wherein said ratio A is 3 or larger.
4. weft inserting apparatus according to claim 1, wherein said ratio A is 4.5 or less.
5. according to the weft inserting apparatus described in claim 1 to 4 any one, wherein said spray-hole is the shape of frustum of a cone.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010208424A JP5553443B2 (en) | 2010-09-16 | 2010-09-16 | Weft insertion device in jet loom |
| JP2010-208424 | 2010-09-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102409469A CN102409469A (en) | 2012-04-11 |
| CN102409469B true CN102409469B (en) | 2014-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110270922.0A Active CN102409469B (en) | 2010-09-16 | 2011-09-14 | Weft insertion apparatus in jet loom |
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|---|---|
| EP (1) | EP2431507B1 (en) |
| JP (1) | JP5553443B2 (en) |
| CN (1) | CN102409469B (en) |
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| CN103696100A (en) * | 2013-12-05 | 2014-04-02 | 建滔（清远）玻璃纤维有限公司 | Pressure reducing throttle mechanism for air jet loom |
| CN104711748A (en) * | 2013-12-13 | 2015-06-17 | 江南大学 | Technological parameter adjustment method of energy-saving auxiliary jet nozzle of air jet loom |
| JP7364356B2 (en) * | 2019-05-13 | 2023-10-18 | 津田駒工業株式会社 | Sub-nozzle for air-jet looms |
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| CN101775692A (en) * | 2010-02-08 | 2010-07-14 | 金坛市天盛机械制造有限公司 | Pipeline plate subassembly for assisting nozzle |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP2431507B1 (en) | 2012-10-03 |
| JP5553443B2 (en) | 2014-07-16 |
| CN102409469A (en) | 2012-04-11 |
| EP2431507A1 (en) | 2012-03-21 |
| JP2012062604A (en) | 2012-03-29 |
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