CN101440548B - Method for weaving modified warp-rib fabric on air-jet loom - Google Patents

Abstract

The invention relates to a method for weaving warped and flattened fabrics on an air-jet loom. In the method, a weft yarn detection device is added to the weft insertion system of the existing air-jet loom. When weaving, a plain weave cam opening mechanism and a weft-changing weft are adopted. Weaving on four-color weft-selecting air-jet loom with dense electronic take-up and electronic warp let-off device. The let-off amount and take-up amount of the loom change according to the set rule, and in accordance with the change of the let-off amount and take-up amount, each opening is introduced according to the set weft insertion sequence, and the corresponding weft yarns with different numbers are introduced to realize the change. Weaving of heavy flat fabrics. The invention is beneficial in that: the method of introducing different numbers of weft yarns into each opening of the changed warp-heavy flat fabric can increase the running speed of the loom, increase the weft insertion rate and output, reduce production costs, and improve the economical efficiency of the weaving enterprise. benefit.

Description

Method for weaving variable warped and flattened fabrics on air-jet loom

technical field

The invention relates to a method for weaving woven fabrics in the field of textiles, in particular to a method for weaving variable warped flattened fabrics on an air-jet loom.

Background technique

One of the goals pursued by modern weaving technology is efficient weaving with high yield, high quality and low consumption. Due to the characteristics of high speed, high degree of automation and good product quality, the air-jet loom has developed rapidly in recent years and has become the main equipment for fabric production.

Among many factors that affect the efficient weaving of looms, the weft insertion rate of looms is a major factor. The weft insertion rate refers to the length of the weft yarn introduced into the shed per minute by the loom, and it is an indicator to measure the production capacity (output) of the loom. When the reed width of the loom is fixed, the weft insertion rate is directly proportional to the loom speed and the number of weft yarns introduced into each opening, while the traditional air-jet loom weft insertion method only introduces one weft yarn per opening, so the increase The weft insertion rate of the loom can only be achieved by increasing the speed of the loom. However, the actual operating speed of the air-jet loom is affected by the quality of the yarn and the preparation process and equipment, so the increase in weft insertion rate is limited. And increasing the number of weft yarns introduced into the shed each time can achieve a high weft insertion rate under the condition of low loom speed. Especially under the condition that the current yarn quality and pre-weaving preparation process and technology cannot meet the requirements of high-speed weaving, increasing the number of weft yarns introduced into the shed each time is to achieve high-efficiency weaving of air-jet looms and improve the economic benefits of air-jet weaving enterprises effective way.

A few days ago, the traditional weaving method of changing the warp-heavy flat fabric mostly adopts the dobby shedding mechanism to weave, and each opening introduces a weft yarn, so the weft insertion rate (yield) is low. However, the method of introducing different numbers of weft yarns into each opening is used to weave variable warp and flattened fabrics. Since the number of weft yarns introduced into each opening is > 1, the weft insertion rate of the loom is much higher than that of traditional weaving methods, which is conducive to improving weaving. The weft insertion rate (yield) of the machine can be improved, the production cost can be reduced and the economic benefit of the enterprise can be improved.

Contents of the invention

The technical problem to be solved by the present invention is to provide a method for weaving warped and flattened fabrics on an air-jet loom in view of the current state of the art. By using this method, the loom can be fed into The weft rate and output are doubled, thereby reducing production costs and improving the economic benefits of the enterprise.

The technical solution adopted by the present invention to solve the problems of the technologies described above is:

According to the structural characteristics of warp-heavy flat fabrics, plain weave cam opening mechanism, multi-color weft selection, electronic take-up with variable weft density, and air-jet loom with electronic warp let-off device are used to realize weaving; The law of change is that different numbers of weft yarns are introduced into each opening, and according to the difference in the number of weft insertions each time, the warp let-off mechanism sends out the warp yarns of the corresponding length required for weaving, and the take-up mechanism leads the fabric of the corresponding length away from the weaving fell. The let-off amount and take-up amount of each opening are changed according to the number of weft insertions, so as to extend the same weave points on the basis of plain weave and obtain variable warp-heavy plain fabrics.

The air-jet weft insertion of the above method has the following process: single yarn bobbin → weft yarn detection device → weft feeder → main nozzle → weft yarn is introduced into the shed, using multiple weft yarn bobbins, weft yarn detection devices, multiple weft feeders and multiple The weft insertion system composed of main nozzles, etc., each weft yarn bobbin supplies one weft yarn, and multiple weft yarns inserted at the same time are respectively introduced into the same weft feeder through the weft yarn detection device, and each weft feeder corresponds to a main nozzle.

The let-off amount and take-up amount of each opening can be determined respectively according to the given formula. And input the weft density value required for each weft weaving into the control system of the loom to ensure that the let-off amount and take-up amount of the loom change according to the set rule during the weaving process, and match the let-off amount and take-up amount According to the set weft insertion sequence, each opening introduces corresponding weft yarns of different numbers.

Compared with the existing traditional weaving method in which one weft yarn is introduced into each opening, the present invention has the following advantages:

1. The present invention adopts the method of introducing different numbers of weft yarns into each opening to weave variable warp-heavy flat weave fabrics, and the number of weft yarns introduced into each opening is 1 to 4. Therefore, under the constant speed of the loom, The weft insertion rate and output of the loom can be doubled, thereby reducing production costs and improving economic benefits of the enterprise.

2. The traditional weaving method of changing warp-heavy flat fabrics mostly adopts the dobby shedding mechanism for weaving. The weaving method of introducing different numbers of weft yarns into each opening of the present invention adopts the plain weave cam shedding mechanism for weaving, and the high-speed adaptability of the plain weave cam shedding mechanism It is superior to the multi-arm opening mechanism, so the present invention can increase the running speed of the loom by more than 20%, which is beneficial to the increase of the output of the loom and the economic benefits of the enterprise.

3. When using the weaving method of the present invention to weave fabrics, the number of weft yarns introduced into each opening, the amount of warp let-off and the amount of take-up can be set artificially, while the present warp flat fabric is essentially the number of weft yarns introduced into each opening. , warp let-off and take-up are all constant fabrics, which is a special case of changing warp flat fabrics, therefore, with the method of the present invention, warp heavy flat fabrics can be woven equally, and the weft insertion of warp heavy flat fabrics can be improved. rate and output.

Description of drawings

Fig. 1 is a schematic diagram of the air-jet weft insertion system of the present invention.

Fig. 2 is the upper machine figure of the fabric of the embodiment of the present invention.

Detailed ways

The present invention will be further described in detail below with reference to the embodiments of the accompanying drawings.

变化经重平。A variable warp-heavy-flat fabric is based on plain weave fabric, and is obtained by extending different weave points along the warp direction to obtain floating lengths with different lengths. The fabric specification of this embodiment: JC80 ^S × 80 ^S 220 × 180 63″ (JC7.38 × 7.38 866.1 × 354.3 160cm), the fabric structure is

Changes are rebalanced.

In this embodiment, the plain weave cam mechanism and the four-color weft-supply air-jet loom with variable weft density electronic take-up and electronic warp let-off devices are used for weaving. The let-off amount and take-up amount of the loom change according to the set rule, and in accordance with the change of the let-off amount and the take-up amount, each opening is introduced according to the set weft insertion sequence, and the corresponding weft yarns of different numbers are introduced. The let-off amount, take-up amount and fabric weft density change law of each opening are respectively determined according to the following formula:

Let-off amount L _j :

${\mathrm{<span\; class="notranslate">\; L</span>}}_{\mathrm{<span\; class="notranslate">\; jn</span>}}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 100</span>}}{{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; w</span>}}<span\; class="notranslate">\; \&times;</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; a</span>}}_{\mathrm{<span\; class="notranslate">\; j</span>}}<span\; class="notranslate">\; )</span>}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; no</span>}$

In the formula: L _jn —— let-off amount (mm)

a _j ——Comprehensive warp shrinkage (%)

P _w ——fabric weft density (root/10cm)

n——the number of weft yarns introduced into the shed for each weft (roots)

Coiling amount L _bn :

${\mathrm{<span\; class="notranslate">\; L</span>}}_{\mathrm{<span\; class="notranslate">\; bn</span>}}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 100</span>}}{{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; w</span>}}<span\; class="notranslate">\; \&times;</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; a</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; )</span>}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; no</span>}$

In the formula: L _bn - coiling amount (mm)

P _w ——fabric weft density (root/10cm)

a ₁ —— fabric shrinkage rate (%)

Let-off amount L _j :

${\mathrm{<span\; class="notranslate">\; L</span>}}_{\mathrm{<span\; class="notranslate">\; jn</span>}}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 100</span>}}{{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; w</span>}}<span\; class="notranslate">\; \&times;</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; a</span>}}_{\mathrm{<span\; class="notranslate">\; j</span>}}<span\; class="notranslate">\; )</span>}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; no</span>}$

In the formula: L _jn —— let-off amount (mm)

a _j ——Comprehensive warp shrinkage (%)

P _w ——fabric weft density (root/10cm)

n——the number of weft yarns introduced into the shed for each weft (roots)

Coiling amount L _bn :

${\mathrm{<span\; class="notranslate">\; L</span>}}_{\mathrm{<span\; class="notranslate">\; bn</span>}}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 100</span>}}{{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; w</span>}}<span\; class="notranslate">\; \&times;</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; a</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; )</span>}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; no</span>}$

In the formula: L _bn - coiling amount (mm)

P _w ——fabric weft density (root/10cm)

a ₁ ——fabric under machine shrinkage (%)

The air-jet weft insertion of this method has the following process: single yarn bobbin → weft yarn detection device → weft feeder → main nozzle → weft yarn is introduced into the shed, using the weft yarn bobbin 1, weft yarn detection device 2, weft feeder 3 and the main nozzle The weft insertion system composed of 4 etc., each weft yarn bobbin 1 supplies one weft yarn, and multiple weft yarns inserted at the same time are respectively passed through the weft yarn detection device 2 and then introduced into the same weft feeder 3, and each weft feeder 3 corresponds to a main nozzle 4. According to the fabric structure of this embodiment, the number of weft yarns introduced into the shed has four situations, namely 1, 2, 3 and 4 respectively, so this weft insertion system is equipped with 4 weft feeders and 4 main nozzles .

This embodiment is according to the weaving method of the present invention, and its weaving upper machine diagram is as shown in Figure 2.

It can be seen from Figure 2 that the weaving method adopts the weaving method of introducing 1 to 4 weft yarns at each shed. weft. Its weaving principle is:

Firstly, according to the specification requirements of changing warp-heavy flat fabrics, set the change law of fabric weft density, the change value of weft density is determined by a given formula, and input the weft density value required for each weft weaving into the control system of the loom, In order to ensure that in the weaving process, according to the difference in the number of weft insertions each time, the warp let-off mechanism sends out the warp yarn of the corresponding length required for weaving, and the take-up mechanism leads the fabric of the corresponding length away from the weaving fell.

变化经重平织物上机图图2引纬过程为：Secondly, with reference to the schematic diagram of the weft insertion system of accompanying drawing 1 and

The process of weft insertion in Fig. 2 of changing warp-heavy flattened fabric is as follows:

For the first weft insertion, the two weft yarns unwound from the two single-yarn bobbins pass through the weft yarn detection device respectively, wind on the same weft feeder 3a, and introduce the same main nozzle 4a at the same time, when the air jet weft insertion At this time, the airflow ejected from the main nozzle 4a will introduce the two weft yarns into the shed simultaneously to complete a weft insertion.

For the second weft insertion, the four weft yarns unwound from the four single-yarn bobbins pass through the weft yarn detection device respectively, wind on the same weft feeder 3b, and introduce the same main nozzle 4b at the same time, when the air jet weft insertion At the same time, the airflow ejected from the main nozzle 4b will introduce four weft yarns into the shed simultaneously to complete a weft insertion.

For the third weft insertion, a weft yarn unwound from a single yarn bobbin passes through the weft yarn detection device respectively, winds on the weft feeder 3c, and is introduced into the main nozzle 4c. The air-flow ejected on 4c introduces the weft yarn into the shed simultaneously, and completes a weft insertion.

For the fourth weft insertion, the two weft yarns unwound from the two single-yarn bobbins pass through the weft yarn detection device respectively, wind on the same weft feeder 3a, and introduce the same main nozzle 4a at the same time, when the air jet weft insertion At this time, the airflow ejected from the main nozzle 4a will introduce the two weft yarns into the shed simultaneously to complete a weft insertion.

For the fifth weft insertion, the three weft yarns unwound from the three single-yarn bobbins respectively pass through the weft yarn detection device, are wound on the same weft feeder 3d, and are introduced into the same main nozzle 4d at the same time. , the airflow ejected from the main nozzle 4d will introduce three weft yarns into the shed simultaneously to complete a weft insertion.

In the sixth weft insertion, a weft yarn unwound from a single yarn bobbin passes through the weft yarn detection device respectively, winds on the weft feeder 3c, and is introduced into the main nozzle 4c. The air-flow ejected on 4c introduces the weft yarn into the shed simultaneously, and completes a weft insertion.

This embodiment completes the weaving of one weaving cycle through six times of weft insertion.

Claims (4)

1. the method for a weaving modified warp-rib fabric on air-jet loom is characterized in that: the polychrome that this method adopts the plain weave cam shedding mechanism and has the electronic take-up mechanism, electronic warp feeding mechanism and the pneumatic picking system that become filling density selects the latitude air-jet loom weaving; When weaving, the Changing Pattern of counting according to fabric homologue, shed open is once introduced single or many weft yarns, and according to the difference of wefting insertion radical each time, warp-feeding mechanism is sent the warp thread of weaving Len req accordingly, spooler deflects from fell with the fabric of respective length, realizes that the warp run-in of each opening and the amount of batching cooperate the wefting insertion radical and change.

2. according to the method for right 1 described weaving modified warp-rib fabric on air-jet loom, it is characterized in that: described pneumatic picking system includes a plurality of weft yarn bobbins, weft yarn checkout gear, a plurality of weft accumulator and a plurality of main burner, weft yarn of each weft yarn bobbin supply, many weft yarns with a wefting insertion are introduced same weft accumulator respectively behind the weft yarn checkout gear, each weft accumulator is to there being a main burner.

3. according to the method for right 1 or 2 described weaving modified warp-rib fabric on air-jet loom, it is characterized in that: according to weft yarn thickness difference, the weft yarn radical that shed open once can be introduced is the 1-4 root.

4. according to the method for right 1 or 2 described weaving modified warp-rib fabric on air-jet loom, it is characterized in that: the warp run-in of the each opening of described loom and the amount of batching draw respectively as follows:

Warp run-in L _Jn:

$L_{\mathrm{jn}}=\frac{100}{P_w\&times;(1-a_j)}\&times;n$

In the formula: L _Jn---warp run-in (mm)

a _j---the comprehensive shrinkage of warp thread (%)

P _w---pick count (root/10cm)

N---each latitude is introduced the weft yarn radical (root) of shed open

The amount of batching L _Bn:

$L_{\mathrm{bn}}=\frac{100}{P_w\&times;(1-a_1)}\&times;n$

In the formula: L _Bn---the amount of batching (mm)

P _w---pick count (root/10cm)

a ₁---machine shrinkage (%) under the fabric

N---each latitude is introduced the weft yarn radical (root) of shed open.

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