Method for boring knitted tubular cloth and dotting device for tubular cloth loom

Abstract

The present invention belongs to the field of textile technology, and discloses a method for boring knitted cylindrical cloth and a dotting device for a cylindrical cloth loom. The method for boring knitted cylindrical cloth comprises the following steps: when the cylindrical cloth loom is weaving, the cylindrical cloth loom dots the woven cloth to form marking points for each circle of weaving, and the marking points formed each time are offset by a set angle in the horizontal direction relative to the marking points formed last time; after the cylindrical cloth loom is finished weaving, a plurality of marking points distributed at intervals are formed on the cloth, and the plurality of marking points are connected into a straight line, and the straight line is perpendicular to the weft grain of the cloth; and then a cutting tool is used to bore the cloth along the straight line formed by the plurality of marking points. Through the method for boring knitted cylindrical cloth, the weft grain of the bored cloth is perpendicular to the edge of the cloth, which reduces the cutting loss in garment production, and the cutting loss is controlled within 3%; using the method for boring knitted cylindrical cloth, no manual participation in dotting is required, and the cloth can be accurately bored along the marking points, saving manpower and material resources.

Description

Technical Field

[0001] The invention relates to the technical field of textiles, in particular to a method for boring knitted cylindrical cloth and a dotting device for a cylindrical cloth loom. Background Art

[0002] When knitting cylindrical cloth looms are used to weave cotton plain cloth, especially when high-twist and high-yarn count are used, there is a problem of large weft skew, that is, after washing and drying, there is a non-90° angle between the weft grain and the edge of the cloth (i.e., the warp grain). This is because the yarn is twisted during spinning, and there will be a reactionary internal stress at the position where the yarn is twisted in a relaxed state. When boring the cylindrical cloth, it is along the warp grain of the cloth. After boring, the weft grain of the cloth is not perpendicular to the edge of the cloth. However, clothes made of cloth require the weft grain to be perpendicular to the edge of the cloth. In order to achieve the above purpose, when using the cloth to make ready-made clothes, the pieces are adjusted so that the weft grain of the cloth after cutting is perpendicular to the edge of the cloth, but this operation method has a large loss, with a cutting loss of 6-8%.

[0003] In order to solve the above problems, the existing boring method is as follows: a boring head is installed on the cloth loosening machine, which is supported by an umbrella frame and rotated at a fixed speed to drive the cloth to generate a lateral speed relative to the boring cutter. After the bored cloth is processed, its weft grain is perpendicular to the edge of the cloth. However, in the existing boring method, the tension of the umbrella frame is unstable, which causes the cloth to slip when rotating, affecting the accuracy, and the whole process requires human participation, wasting a lot of manpower. Summary of the invention

[0004] The object of the present invention is to provide a method for boring knitted cylindrical cloth and a dotting device for a cylindrical cloth loom, which can obtain a finished cloth with a cutting loss controlled within 3% and a weft pattern perpendicular to the edge of the cut cloth.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A method for boring knitted tubular cloth comprises the following steps:

[0007] The cylindrical cloth loom forms a marking point on the cloth every time it weaves one circle, and the marking point formed each time is offset by a set angle in the horizontal direction relative to the marking point formed last time;

[0008] After the cylindrical cloth loom is completed, a plurality of spaced marking points are formed on the cloth, and a straight line formed by connecting the plurality of marking points is perpendicular to the weft grain of the cloth;

[0009] Then use a cutting tool to bore the cloth along the straight line.

[0010] As an optional scheme, the set angle = M / CPI*tan((90°-α) / 180°*π)*WPI / S*360°, where M is the modulus of the cylindrical cloth loom, CPI is the warp density of the cloth, α is the angle between the warp grain of the cloth and the weft grain of the cloth, WPI is the weft density of the cloth, and S is the total number of needles of the cylindrical cloth loom in one weaving circle.

[0011] As an optional solution, before forming the marking points on the cloth, the cylindrical cloth loom first weaves the cloth of a set length as a sample, and then washes and dries the sample to measure the α, the CPI and the WPI.

[0012] As an optional solution, the α is measured using a protractor; the CPI is measured using a density ruler; and the width B of the sample is measured using a tape measure. The WPI is the ratio of the total number of needles in one round of weaving on the cylindrical cloth loom to the width of the sample / 2.54, that is, WPI=S / (B / 2.54).

[0013] As an optional solution, the set length of the sample is 2m.

[0014] The dotting device of a cylindrical cloth loom is applied to the boring method of knitted cylindrical cloth described in any of the above schemes, and the dotting device of the cylindrical cloth loom is used to form the marking points, and the dotting device of the cylindrical cloth loom comprises:

[0015] A first driving member is arranged on the main shaft of the cylindrical cloth loom;

[0016] The dotting component includes a fixed seat, a second driving member and a dotting member, wherein the fixed seat is arranged at the output end of the first driving member, the second driving member is fixedly arranged on the fixed seat, and the dotting member is fixedly arranged at the output end of the second driving member. The first driving member can drive the second driving member to rotate a set angle in the horizontal direction, and the second driving member can drive the dotting member to perform a dotting operation toward the cloth.

[0017] As an optional solution, the fixing seat is fixedly arranged at the output end of the first driving member through a connecting rod.

[0018] As an optional solution, the first driving member is a stepping motor.

[0019] As an optional solution, the dotting member is a paint pen.

[0020] As an optional solution, the second driving member is an electric push rod or a linear motor.

[0021] Beneficial effects of the present invention:

[0022] The present invention provides a method for boring knitted cylindrical cloth. When the cylindrical cloth loom is weaving, the woven cloth is dotted to form marking points after each weaving of the cylindrical cloth loom, and each marking point formed is offset by a set angle in the horizontal direction relative to the marking point formed last time; after the cylindrical cloth loom is finished weaving, a plurality of marking points distributed at intervals are formed on the cloth, and the plurality of marking points are connected into a straight line, and the straight line is perpendicular to the weft grain of the cloth; and then a cutting tool is used to bore the cloth along the straight line formed by the plurality of marking points. The method for boring knitted cylindrical cloth makes the weft grain of the bored cloth perpendicular to the edge of the cloth, and reduces the cutting loss in garment production, and the cutting loss is controlled within 3%; the method for boring knitted cylindrical cloth does not require manual participation in dotting, and the cloth can be accurately bored along the marking points, saving manpower and material resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a flow chart of a method for boring knitted tubular cloth provided in an embodiment of the present invention;

[0024] Figure 2 is a schematic diagram of setting the marking points involved in the embodiment of the present invention on the cloth;

[0025] Figure 3 is a reference geometric diagram for setting angle calculation involved in the embodiment of the present invention;

[0026] Figure 4 is a schematic structural diagram of a dotting device for a cylindrical cloth loom provided by an embodiment of the present invention;

[0027] Figure 5 yes Figure 4 A magnified view of the structure at center.

[0028] In the figure:

[0029] 1. Marking points;

[0030] 2. A first driving member;

[0031] 3. Dotting assembly; 31. Fixed seat; 32. Second driving member; 33. Dotting member;

[0032] 4. Connecting rod;

[0033] 100, main shaft; 200, loom cylinder. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar parts or parts having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0035] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, it can be a mechanical connection or an electrical connection, it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the description of the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0037] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0038] The cloth woven by the cylindrical cloth loom is cylindrical, that is, the cloth is woven in a cylindrical shape on the loom cylinder of the cylindrical cloth loom. The weft grain of the cylindrical cloth is set at an angle to the horizontal direction. The ordinary boring method is to boring the cloth along the warp grain of the cylindrical cloth. The edge of the finished product is parallel to the warp grain of the cloth, and the weft grain of the cloth is set at a non-90° angle to the edge of the cloth. However, after the finished clothes are actually made, the weft grain of the finished clothes is required to be perpendicular to the edge of the finished clothes. Therefore, this requires that the weft grain of the cut cloth be set at 90° to the edge of the cloth.

[0039] like Figure 1 and Figure 2As shown, an embodiment of the present invention provides a method for boring knitted cylindrical cloth, and the cloth obtained by the method for boring knitted cylindrical cloth has its weft grain perpendicular to the edge of the cloth after boring. The method for boring knitted cylindrical cloth comprises the following steps: when the cylindrical cloth loom is weaving, the cylindrical cloth loom forms a marking point 1 on the cloth for each circle of weaving, and the marking point 1 formed each time is offset by a set angle in the horizontal direction relative to the marking point 1 formed last time; after the cylindrical cloth loom is completed, a plurality of marking points 1 distributed at intervals are formed on the cloth, and the plurality of marking points 1 are connected into a straight line, and the straight line formed by the plurality of marking points 1 is perpendicular to the weft grain of the cloth; and then a cutting tool is used to cut along the straight line. It can be understood that the reverse side of the cloth can be turned outward before boring the cloth to solve the problem that the marking point 1 is difficult to see because the cloth is thick. Optionally, the cutting tool can be scissors.

[0040] The boring method of knitted cylindrical cloth makes the weft grain of the bored cloth perpendicular to the edge of the cloth, and reduces the cutting loss in garment making, with the cutting loss controlled within 3%. The boring method of knitted cylindrical cloth does not require manual participation in dotting, and the cloth can be accurately bored along the marking point 1, saving manpower and material resources.

[0041] When the cylindrical cloth loom is weaving, the cylindrical cloth extends a corresponding length along the vertical direction of the cylindrical cloth loom (i.e., the warp direction of the cloth) for each weaving circle.

[0042] The marking point 1 is formed by using a dotting device of a cylindrical cloth loom, such as Figure 4 As shown, the dotting device of the cylindrical cloth loom includes a first driving member 2 and a dotting assembly 3. Among them, the first driving member 2 is arranged at the bottom end of the main shaft 100 of the cylindrical cloth loom; the dotting assembly 3 is arranged at the output end of the first driving member 2, and the dotting assembly 3 is arranged horizontally, and the dotting device is arranged toward the cylindrical cloth; the first driving member 2 can drive the dotting assembly 3 to rotate in the horizontal direction (i.e., the transverse direction of the cloth), that is, offset by a set angle. Therefore, it can be obtained that when the cylindrical cloth loom is weaving, the first driving member 2 drives the dotting assembly 3 to rotate in the horizontal direction by a set angle for each circle of weaving, and the dotting assembly 3 performs a dotting to form a marking point 1. After the cylindrical cloth loom is completed, a plurality of spaced marking points 1 can be formed along the longitudinal direction of the cloth.

[0043] Calculation of offset setting angle: Setting angle = M / CPI*tan((90°-α) / 180°*π)*WPI / S*360°, M is the modulus of the cylindrical loom, CPI is the warp density of the cloth, α is the angle between the warp grain of the cloth and the weft grain of the cloth, WPI is the weft density of the cloth, and S is the total number of needles of one round of weaving on the cylindrical loom. The offset setting angle is obtained according to the calculation formula, and the straight line formed by the multiple marking points 1 obtained is perpendicular to the weft grain of the cloth.

[0044] In order to more conveniently and accurately obtain the angle α between the warp grain and the weft grain of the cloth, the weft density WPI of the cloth, and the warp density CPI of the cloth, before the cylindrical loom is officially woven, the cylindrical loom first weaves a set length of cloth as a sample, and then washes and dries the sample and measures it to obtain α, CPI, and WPI. This step is to simulate the state of the finished garment after multiple washings. It should be noted that there are different standards for washing and drying, that is, drying after washing, natural drying after washing, or other washing and drying standards. The values ​​of α, CPI, and WPI obtained by different washing and drying standards are slightly different.

[0045] The calculation formula of the offset setting angle is derived as follows: Figure 3 , AB is a straight line formed by multiple marking points 1, and the cloth is bored along this straight line; AC is the length of the cloth obtained by weaving one circle on the cylindrical cloth loom (M / CPI); Point B is the marking point 1 that needs to be formed in the next circle; ∠BAC is 90°-α.

[0046] According to the above data, the length of BC can be obtained as: M / CPI*tan((90°-α) / 180°*π);

[0047] Then calculate the number of coils on the BC line: M / CPI*tan((90°-α) / 180°*π)*WPI;

[0048] When converted to a cylindrical loom for weaving, the number of coils that need to be offset for one circle of the cylindrical loom is: M / CPI*tan((90°-α) / 180°*π)*WPI;

[0049] The angle between the number of BC coils on the cylindrical cloth loom and the total number of needles is: M / CPI*tan((90°-α) / 180°*π)*WPI / S*360°.

[0050] The warp density CPI of the cloth is interpreted as the number of coils in 1 inch of the warp direction of the cloth. For example, if there are 30 coils on a line of 1 inch (2.54 cm) in length in the warp direction, then CPI = 30; the weft density WPI of the cloth is interpreted as the number of coils in 1 inch of the weft direction of the cloth. For example, if there are 40 coils on a line of 1 inch (2.54 cm) in length in the weft direction, then WPI = 40.

[0051] Optionally, the sample is washed and dried and cut into pieces of cloth, the edge of the piece of cloth is parallel to the warp grain of the piece of cloth, and the angle α between the warp grain and the weft grain of the piece of cloth can be measured by a protractor, which makes the measurement more convenient; the warp density CPI of the piece of cloth can be measured by a density ruler, which makes the measurement more convenient; and the weft density WPI on both sides of the piece of cloth is different from the weft density in the middle, and the weft density WPI measured by the density ruler is inaccurate. In order to solve the above problem, a tape measure can be used to measure the width B of the piece of cloth. The weft density WPI is the ratio of the total number of needles S of one circle of the cylindrical cloth loom to the width B / 2.54 of the piece of cloth, that is, WPI=S / (B / 2.54), 1 inch is 2.54cm, and since the width of the piece of cloth is measured by a tape measure, the width is in cm, so B / 2.54 is the unit converted into inches, and the value of WPI can be accurately obtained by this calculation formula.

[0052] Optionally, the set length of the sample is 2m, and a 2m long sample can be measured to obtain the above data after washing and drying.

[0053] For example, a cylindrical cloth loom with a module M of 96 is used to weave a 2m long cloth as a sample, and the sample is washed and dried according to customer requirements. For each round of weaving by the cylindrical cloth loom, 96 coils of cloth can be woven along its warp direction; the total number of needles S of one round of weaving by the cylindrical cloth loom is 2640 needles; the warp density CPI of the cloth measured by a density ruler is 56; the width of the cloth after unfolding is measured by a tape measure, and WPI=2640 / (181 / 2.54)=37; the angle α between the warp grain and the weft grain of the sample cloth is measured by a protractor and is 82°. Therefore, for a cylindrical cloth loom with a module M of 96, according to customer requirements, we can derive the offset setting angle as 96 / 56*tan((90°-82°) / 180°*π)*37 / 2640*360°=1.24°, that is, for every rotation of the cylindrical cloth loom, the first driving member 2 drives the dotting assembly 3 to shift 1.24° in the horizontal direction.

[0054] The embodiment of the present invention further provides a dotting device for a cylindrical cloth loom, and the dotting device for the cylindrical cloth loom is used to form a marking point 1, referring to Figure 4 and Figure 5The dotting device of the cylindrical cloth loom includes a first driving member 2 and a dotting assembly 3. The first driving member 2 is arranged at the lower end of the main shaft 100 of the cylindrical cloth loom; the dotting assembly 3 includes a fixed seat 31, a second driving member 32 and a dotting member 33, the fixed seat 31 is fixedly arranged at the output end of the first driving member 2, the second driving member 32 is fixedly arranged on the fixed seat 31, and the dotting member 33 is fixedly arranged at the output end of the second driving member 32. When the cylindrical cloth loom is weaving, the cylindrical cloth formed by weaving is arranged on the loom cylinder 200 of the cylindrical cloth, the first driving member 2 can drive the second driving member 32 to rotate a set angle in the horizontal direction (i.e. around the axis of the main shaft 100), and the second driving member 32 can drive the dotting member 33 to perform a linear reciprocating motion toward the cloth to perform the dotting operation. According to the set angle calculated above, the first driving member 2 drives the second driving member 32 to rotate the set angle each time through PLC programming.

[0055] The dotting device of the cylindrical cloth loom can realize the formation of marking points 1 on the cloth, and has a simple structure and is easy to use.

[0056] Optionally, the fixing seat 31 is fixedly arranged at the output end of the first driving member 2 through the connecting rod 4. Figure 4 The connecting rod 4 is L-shaped, including a vertical rod and a horizontal rod connected to each other, the upper end of the vertical rod is fixedly connected to the output end of the first driving member 2, and the fixing seat 31 is fixedly arranged on the horizontal rod, and the horizontal rod is parallel to the horizontal direction. This structure makes the connection between the first driving member 2 and the dotting assembly 3 more reasonable.

[0057] Optionally, the first driving member 2 is a stepping motor, which has high precision and can be controlled by programming.

[0058] Optionally, the second driving member 32 is an electric push rod or a linear motor, which can realize the reciprocating linear motion of the dotting member 33 .

[0059] Optionally, the dotting member 33 is a paint pen, and a darker and easier-to-clean paint can be selected.

[0060] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A method for boring knitted tubular cloth, characterized in that: The steps include: The cylindrical cloth loom forms a marking point (1) on the cloth each time it weaves one circle, and the marking point (1) formed each time is offset by a set angle in the horizontal direction relative to the marking point (1) formed last time; After the cylindrical cloth loom is completed, a plurality of spaced marking points (1) are formed on the cloth, and a straight line formed by connecting the plurality of marking points (1) is perpendicular to the weft grain of the cloth; Then, a cutting tool is used to bore the cloth along the straight line; The setting angle = M / CPI*tan((90°-α) / 180°*π)*WPI / S*360°, where M is the modulus of the cylindrical cloth loom, CPI is the warp density of the cloth, α is the angle between the warp grain of the cloth and the weft grain of the cloth, WPI is the weft density of the cloth, and S is the total number of needles of the cylindrical cloth loom for one round of weaving; Before forming the marking point (1) on the cloth, the cylindrical cloth loom first weaves the cloth of a set length as a sample, and then washes and dries the sample to measure the α, the CPI and the WPI; The α is measured by a protractor; the CPI is measured by a density ruler; the width B of the sample is measured by a tape measure, and the WPI is the ratio of the total number of needles of one round of weaving on the cylindrical cloth loom to the width of the sample / 2.54, that is, WPI=S / (B / 2.54).

2. The method for boring a knitted tubular cloth according to claim 1, characterized in that: The set length of the sample is 2m.

3. The dotting device of the cylindrical cloth loom is characterized in that: The method for boring a knitted cylindrical cloth according to any one of claims 1 to 2, wherein the dotting device of the cylindrical cloth loom is used to form the marking point (1), and the dotting device of the cylindrical cloth loom comprises: A first driving member (2) is arranged on a main shaft (100) of the cylindrical cloth loom; The dotting assembly (3) comprises a fixing seat (31), a second driving member (32) and a dotting member (33), wherein the fixing seat (31) is arranged at the output end of the first driving member (2), the second driving member (32) is fixedly arranged on the fixing seat (31), and the dotting member (33) is fixedly arranged at the output end of the second driving member (32); the first driving member (2) can drive the second driving member (32) to rotate at a set angle in the horizontal direction, and the second driving member (32) can drive the dotting member (33) to perform a dotting operation toward the cloth.

4. The dotting device for a cylindrical cloth loom according to claim 3, characterized in that: The fixing seat (31) is fixedly arranged at the output end of the first driving member (2) via a connecting rod (4).

5. The dotting device for a cylindrical cloth loom according to claim 3, characterized in that: The first driving member (2) is a stepping motor.

6. The dotting device for a cylindrical cloth loom according to claim 3, characterized in that: The dotting member (33) is a paint pen.

7. The dotting device for a cylindrical cloth loom according to claim 3, characterized in that: The second driving member (32) is an electric push rod or a linear motor.

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