WO2024012383A1

WO2024012383A1 - Tow colorimetric method and yarn colorimetric machine

Info

Publication number: WO2024012383A1
Application number: PCT/CN2023/106462
Authority: WO
Inventors: 邵义伟; 赵艳丽; 宋勤芳; 刘莎莎
Original assignee: 江苏恒力化纤股份有限公司
Priority date: 2022-07-12
Filing date: 2023-07-10
Publication date: 2024-01-18
Also published as: CN115029909A

Abstract

A tow colorimetric method and a yarn colorimetric machine. The tow colorimetric method comprises: separately winding a tow A and a tow B on a tow collection device to form a tow A strip and a tow B strip which are arranged in parallel, and after observing a color difference between the tow A strip and the tow B strip under a light source, determining a color difference level of the tow A strip and the tow B strip. The yarn colorimetric machine comprises a tow collection device, the tow collection device being a reel (4), the reel (4) comprising n plates, n being a positive integer greater than 2, the n plates being distributed around an axis x, the n plates each comprising a group of opposite edges which are respectively an edge a and an edge b, the edge b being relatively farther away from the axis x relative to the edge a, the edge b being parallel to the axis x, and edges b of the n plates forming n side edges of an n-sided prism. The tow colorimetric method can improve the quality of flat yarn products, and help customers to reduce quality reduction of follow-up products caused by color differences; and the yarn colorimetric machine can solve the problem of difficulty in distinguishing slight color differences.

Description

A kind of tow color comparison method and yarn color comparison machine

Technical field

The invention belongs to the technical field of textile chemical fibers and relates to a tow color comparison method and a yarn color comparison machine.

Background technique

Customers who purchase industrial yarn have high requirements for product color uniformity. Customers find uneven black and white stripes in warping, weaving or webbing. The product itself is traced back to the color difference between each spindle.

However, it is difficult to see the color difference between each spindle from the appearance inspection, mainly because the shape of the silk cake is cylindrical, and the silk bundles are cross-wound, so the reflective points are small, making it difficult to judge intuitively. Therefore, it is necessary to observe the color difference between spindle positions in an intuitive way.

There is a yarn color comparison machine in the prior art. This equipment winds the filament bundles on the pallet by setting the width and speed to compare the color differences. During use, it is found that obvious color differences are easy to distinguish, but slight color differences are difficult to distinguish due to the narrow width and The influence of the background color of the card board cannot be clearly distinguished, which causes trouble in the judgment of the results.

Therefore, it is of great significance to study a new tow color comparison method and yarn color comparison machine to solve the problem of difficult to distinguish slight color differences.

Contents of the invention

In order to solve the problems existing in the prior art, the present invention provides a tow color comparison method and a yarn color comparison machine.

In order to achieve the above object, the scheme adopted by the present invention is as follows:

A tow color comparison method. The tow A and tow B are respectively wound around a tow collection device to form parallel tow A strips and tow B strips. The tow A strips and tow B strips are observed under a light source. Color difference of tow B strip, and determine the color difference grade of tow A strip and tow B strip according to the "Gray Sample Card for Evaluating Discoloration";

In actual application, the filament bundle A and the filament bundle B used for color comparison, one is the filament to be tested, and the other is the standard filament. There are two situations in the selection of the standard filament: the first one, when the product is first produced, it needs to be Under stable conditions, select two consecutive doffings in the whole spinning position for color difference comparison. Among the yarns that reach level 5 of the "Gray Sample Card for Evaluating Discoloration", select the second doffing spindle as the standard yarn; in the second type, the old standard yarn is used When it is necessary to replace the new standard wire, use the first color comparison method and put in the old standard wire for comparison together. If the old standard wire reaches level 5, select the second dropped spindle as the new standard wire;

The tow collection device is a yarn frame. The shape and size of the yarn frame meet the following requirements: each tow becomes a hollow n-prism shape after being wound around the tow collection device, and except for the tows at n side positions of the n prisms, they are in contact with the yarn frame. , the tows at other positions are not in contact with the yarn frame, n is a positive integer greater than 2;

The length of the tow A strip and the tow B strip are not less than 9.5cm, the width is not less than 2.6cm, and the thickness is less than 0.5cm. The value range of the tension is 100~350cN. The tension is too loose or too high. The tightness makes the wrapped filament bundle uneven and difficult to observe; when the filament bundle A or the filament bundle B is a black filament bundle, the light source is a lighting lamp with a color temperature of 4000~6500K plus a light source with an illumination of not less than 270lx (the color temperature mainly reflects the light Medium color component), in other cases, the light source is a lighting lamp with a color temperature of 4000~6500K.

When the tow collection device is fixed, the colorimetric accuracy depends on the strip length, strip width, strip thickness, strip tension and light source. The present invention rationally sets the strip length, strip width, strip thickness, strip The belt tension and light source ensure high colorimetric accuracy and make up for the shortcomings of the existing technology.

As the preferred technical solution:

As described above, in a tow color comparison method, the tow A strip and the tow B strip have the same length, the same width, the same thickness, and the same tension.

According to the above-mentioned tow color comparison method, the length of the tow A strip and the tow B strip is 9.5~10.5cm.

According to the above-mentioned tow color comparison method, the width of the tow A strip and the tow B strip is 2.6~3.0cm.

As mentioned above, the thickness of the tow A strip and the tow B strip is 0.2~0.3cm. Such setting of the thickness can avoid transparency and light leakage caused by being too thin, which will affect the color comparison. , it can also avoid the overlapping and interlacing of tows caused by being too thick, which affects judgment and causes waste.

The invention also provides a yarn color comparison machine, which includes an equipment body, a yarn guide, a tensioner, a traverse yarn guide and a yarn collection device. The yarn collection device is a yarn frame; the shape and size of the yarn frame satisfy: Each type of filament bundle is in the shape of a hollow n prism after being wound around the filament bundle collection device, and except for the filament bundles at n side positions of the n prisms that are in contact with the yarn frame, the filament bundles at other positions are not in contact with the yarn frame; specifically, The yarn frame includes n boards, n is a positive integer greater than 2, and the n boards are distributed around the axis x; the n boards each contain a set of opposite sides, namely side a and side b, and side b is distanced from the axis x relative to side a. Far away, the side b is parallel to the axis is less than 9.5cm, and the length of side b (that is, the sum of the arrangement widths of all tows to be compared) is not less than 5.2cm; the existing tow collection device is a pallet, and the tows wrapped on its surface are detected The length of the section is 4cm. The tow collection device of the present invention is a yarn frame. The length of the detection section of the tow wrapped around its surface is not less than 9.5cm, which is more conducive to observing the color difference; color comparison generally involves comparing two types of filaments. , the sum of the arrangement widths of all the tows to be compared is not less than 5.2cm, that is, the arrangement width of each tow is not less than 2.6cm, when the arrangement width of the tows is less than 2.6cm, it is not easy to observe, so 2.6cm is the minimum value of the arrangement width of the tows.

As the preferred technical solution:

For a yarn color comparison machine as mentioned above, the distance between two adjacent sides b is 9.5~10.5cm. The distance between two adjacent sides b is within the range of 9.5~10.5cm, which can not only save the length of the tow, but also Accurately determine color differences.

A yarn color comparison machine as described above, n prisms are regular hexagonal prisms, n plates are six rectangular plates with the same size, side a and side b are the long sides of the rectangular plates; n prisms can also be six bases Hexagonal prisms whose sides are not completely equal can also be triangular prisms, four-prism prisms, pentagonal prisms, etc. Since regular hexagonal prisms are regular in shape, easy to process, and have better color comparison effects, they are preferred in the present invention.

A yarn color comparison machine as described above, the yarn frame also includes a central cylinder, six rear side connecting rods with the same shape and size, and six front side connecting rods with the same shape and size; the rear side connecting rod is connected to the front side The rods are the same shape and size;

One end of the central cylinder is the connection end, which is connected to the motor I in the main body of the equipment. The motor I controls its rotation around its own central axis (specifically, the central cylinder is driven by a separate motor I through two pairs of pulleys, and the rotation speed of the central cylinder is controlled electrically. It can be infinitely variable, and the control panel has counting and speed adjustment functions. The center cylinder starts smoothly, slows down and stops automatically in the last circle), and the other end is a non-connected end; the motor I is used to control the speed of the yarn frame;

The axis x is the central axis of the central cylinder;

Six rear connecting rods are evenly distributed around the central cylinder along its radial circumference and close to the connecting end of the central cylinder; six front connecting rods are evenly distributed around the central cylinder along its radial circumference and close to the non-connecting end of the central cylinder; six The orthographic projections of the rear connecting rods and the six front connecting rods on a plane perpendicular to the central cylinder completely coincide;

One end of the rear connecting rod and the front connecting rod is connected to the peripheral surface of the central cylinder, and the other end is connected to the side a of the rectangular plate.

A yarn colorimetric machine as mentioned above, the length of the rectangular plate is 39~41cm, the width is 1.95~2.05cm; the length of the front connecting rod is 6.2~6.4cm, the diameter is 0.9~1.1cm; the center cylinder The length is 26~28cm and the diameter is 3~4cm.

As described above, in a yarn color comparison machine, a rectangular plate of the yarn frame is provided with a positioning pin for fixing the filament head. The positioning pin is specifically an oval metal piece, which is fixed on the rectangular plate through screws. The head is clamped into the metal sheet and fixed. The position of the filament bundle head is not fixed on the prior art clamping plate, which easily causes the filament bundle to fall off. The present invention successfully solves this problem by providing positioning pins.

In a yarn color comparison machine as described above, the traverse yarn guide is composed of a horizontal bar and a plurality of pig tail porcelain pieces; the number of the plurality of pig tail porcelain pieces is more than two; the plurality of pig tail porcelain pieces They are arranged at equal intervals along the length of the crossbar of the traversing wire guide, and the lower end is connected to the crossbar of the traversing wire guide at the same time; one end of the crossbar of the traversing wire guide is the connection end, which is connected to the motor in the main body of the equipment. II is connected, and the motor II controls its reciprocating movement in the transverse direction (specifically, a separate synchronous motor II directly drives the cam to operate at a constant speed, pushing the traverse yarn guide to reciprocate laterally), and the other end is a non-connected end; the structure of the yarn guide is the same Traverse yarn guide; the central cylinder of the yarn frame, the cross bar of the traverse yarn guide and the central axis of the cross bar of the yarn guide are parallel to each other; the guide of the traverse yarn guide of the yarn colorimetric machine in the prior art The wire element is U-shaped, and the pores are small. When testing thick yarn, the wire bundle is damaged and winds on the pallet unevenly. The wire guide element of the traverse wire guide of the yarn colorimeter of the present invention is a pig tail porcelain piece, and the pores are It is round and has large pores, and does not affect thick or thin filament bundles. When used, the filament bundle is wound around the positioning pin of the rectangular plate of the yarn frame through the pig tail porcelain on the traverse wire guide.

A yarn colorimetric machine as described above, the main body of the equipment is installed on the equipment base, a bracket is fixed vertically on the equipment base, one end of the crossbar of the yarn guide is the connecting end, fixedly connected to the bracket, and the other end is the non-connected end.

As described above, in a yarn color comparison machine, the tensioner is composed of a horizontal bar, multiple vertical bars, multiple metal clips, multiple springs and multiple screws; multiple vertical bars, multiple metal clips , the number of multiple springs and multiple screws is more than two; multiple vertical rods are arranged at equal intervals along the length direction of the tensioner's crossbar, and the lower end is connected to the tensioner's crossbar at the same time; one end of the tensioner is The connection end is fixedly connected to the main body of the equipment, and the other end is a non-connection end; each vertical rod is covered with a screw, two metal clips and a spring from top to bottom. The screw is threadedly connected to the vertical rod. When in use Adjust the tension by adjusting the spring tightness by rotating the screw. The filament bundle is introduced into the pig tail porcelain on the traversing wire guide through the holes in the two metal clips in the tensioner, and then wound around the positioning pin of the rectangular plate of the yarn frame. On the yarn frame, the wound tows must have a certain tension before they can be laid flat on the yarn frame, making it easy to observe the color of the tows; the central cylinder of the yarn frame and the central axis of the crossbar of the tensioner are parallel to each other.

In a yarn color comparison machine as described above, the central cylinder of the yarn frame, the cross bar of the traversing yarn guide, the cross bar of the tensioner, and the cross bar of the yarn guide are arranged in sequence in the horizontal direction.

beneficial effects

The tow color comparison method and yarn color comparison machine of the present invention can solve the problem of difficulty in distinguishing slight color differences, improve the ease of operation for employees, improve the quality of raw silk products, and help customers reduce quality problems caused by color differences in subsequent products.

Description of drawings

Figure 1 is a yarn color comparison machine of the present invention;

Figure 2 is a front view of the traversing wire guide;

Figure 3 is a normal picture of black yarn; among them, (a) is the yarn to be tested and (b) is the standard yarn;

Figure 4 is an abnormal picture of black yarn; among them, (a) is the yarn to be tested I, (b) is the standard yarn, and (c) is the yarn to be tested II;

Figure 5 is a normal picture of white yarn; among them, (a) is the yarn to be tested and (b) is the standard yarn;

Figure 6 is an abnormal picture of white yarn; among them, (a) is the yarn to be tested I, (b) is the standard yarn, and (c) is the yarn to be tested II;

Among them, 1-yarn guide, 2-tensioner, 3-traverse yarn guide, 4-yarn frame, 4.1-center cylinder, 4.2-rear connecting rod, 4.3-front connecting rod, 4.4-rectangular plate, 5-power switch, 6-traverse yarn guide speed knob, 7-start key, 8-stop key, 9-clear key, 10-display control panel, 11-base control panel, 12-yarn frame adjustment speed knob.

Implementation

The present invention will be further described below in conjunction with specific embodiments. It should be understood that these examples are only used to illustrate the invention and are not intended to limit the scope of the invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of this application.

A yarn color comparison machine, as shown in Figures 1 and 2, includes a main body of the equipment, a yarn guide 1, a tensioner 2, a traverse yarn guide 3 and a tow collection device;

The main body of the equipment includes power switch 5, traverse yarn guide speed knob 6, start key 7, stop key 8, clear key 9, display control panel 10, base control panel 11, yarn frame speed knob 12, motor I and motor II; among them, the power switch 5, the traverse yarn guide speed knob 6, the start key 7, the stop key 8, the clear key 9 and the yarn frame speed knob 12 are set on the base control panel 11; the power switch 5 controls the equipment to be powered on, the traverse yarn guide speed control knob 6 controls the operating speed of the traverse yarn guide 3 (that is, controls the operating speed of motor II), the start button 7 controls the operation of motor I and motor II, and the stop button 8 controls the operation of motor I. and motor II stops, the clear key 9 can clear the displayed number of running circles, the yarn frame speed knob 12 controls the running speed of the tow collection device (that is, controls the running speed of motor I), and the display control panel 10 is used to set Set the number of winding turns and display the number of test turns;

As shown in Figure 1, the tow collection device is a yarn frame 4. The yarn frame 4 consists of a central cylinder 4.1, six rear connecting rods 4.2 of the same shape and size, six front connecting rods 4.3 of the same shape and size, and six It is composed of rectangular plates 4.4 with the same size; the rear connecting rod 4.2 and the front connecting rod 4.3 have the same shape and size;

The length of the central cylinder 4.1 is 26~28cm and the diameter is 3~4cm; one end of the central cylinder 4.1 is a connecting end, connected to the motor I in the main body of the equipment, and the motor I controls it to rotate around its own central axis, and the other end is non-connected end; six rear connecting rods 4.2 are evenly distributed around the central cylinder 4.1 along its radial circumference, and are close to the connecting end of the central cylinder 4.1;

The length of the front connecting rod 4.3 is 6.2~6.4cm and the diameter is 0.9~1.1cm; the six front connecting rods 4.3 are evenly distributed around the central cylinder 4.1 along its radial circumference and close to the non-connected end of the central cylinder 4.1; the six rear connecting rods The orthographic projections of the side connecting rods 4.2 and the six front connecting rods 4.3 on a plane perpendicular to the central cylinder 4.1 completely coincide;

The length of the rectangular plate 4.4 is 39~41cm and the width is 1.95~2.05cm; the six rectangular plates 4.4 are evenly distributed around the circumference of the central cylinder 4.1, and the long sides of the six rectangular plates 4.4 are parallel to the central axis of the central cylinder 4.1, one of which The long side is side a, and the other long side is side b. Side b is farther from the central axis of the central cylinder than side a. Side b of the six rectangular plates 4.4 constitutes the six sides of the regular hexagonal prism. Two adjacent sides The distance of b is not less than 9.5cm, and the length of side b is not less than 5.2cm; one end of the rear connecting rod 4.2 and the front connecting rod 4.3 is connected to the peripheral surface of the central cylinder 4.1, and the other end is connected to the side a of the rectangular plate 4.4 Connection; one of the six rectangular plates 4.4 is provided with a positioning pin for fixing the tow head;

The traverse wire guide 3 is composed of a cross bar and a plurality of pig tail porcelain pieces; the number of the plurality of pig tail porcelain pieces is more than two; the plurality of pig tail porcelain pieces move along the traverse wire guide 3 The crossbars are arranged at equal intervals in the length direction, and the lower end is connected to the crossbar at the same time; one end of the crossbar is a connecting end, connected to the motor II in the main body of the equipment, and the motor II controls its reciprocating movement in the transverse direction, and the other end is non-connected end;

The structure of yarn guide 1 is the same as that of traverse yarn guide 3;

The main body of the equipment is installed on the equipment base, and a bracket is vertically fixed on the equipment base. One end of the crossbar of the wire guide 1 is the connecting end, which is fixedly connected to the bracket, and the other end is the non-connecting end;

The tensioner 2 is composed of a horizontal bar, a plurality of vertical bars, a plurality of metal clips, a plurality of springs and a plurality of screws; the numbers of the plurality of vertical bars, a plurality of metal clips, a plurality of springs and a plurality of screws are There are more than two; the plurality of vertical bars are arranged at equal intervals along the length direction of the cross bar of the tensioner 2, and the lower ends are connected to the cross bar at the same time; one end of the cross bar is a connecting end, fixedly connected to the main body of the equipment, and the other is connected to the main body of the equipment. One end is a non-connected end; each vertical rod is equipped with a screw, two metal clips and a spring from top to bottom, and the screw is threadedly connected to the vertical rod;

The central axes of the central cylinder 4.1 of the yarn frame 4, the cross bar of the traverse yarn guide 3, the cross bar of the tensioner 2, and the cross bar of the yarn guide 1 are parallel to each other, and the four are arranged sequentially in the horizontal direction.

A tow color comparison method, using the yarn color comparison machine as mentioned above, the specific process is as follows:

Fix the filament bundle A and filament bundle B on the yarn frame 4 through the yarn guide 1, the tensioner 2, and the traverse yarn guide 3. By setting the appropriate tension, speed, and number of turns, the filament bundle A and the filament bundle B Lay it flat on the yarn frame 4 to form parallel-arranged tow A strips and tow B strips. Observe the color difference between tow A strips and tow B strips under a light source, and use gray samples to evaluate discoloration. Card" determines the color difference grade of the tow A strip and the tow B strip, and effectively distinguishes and isolates the color difference products; among them, the tow A strip is the tow A (the silk to be tested) and is laid flat on the yarn frame 4 The tow B strip is formed by laying the standard silk tow B (standard silk) flat on the yarn frame 4; the length of the tow A strip and the tow B strip are both 9.5~10.5cm, and the width Both are 2.6~3.0cm, the thickness is 0.2~0.3cm, and the tension is 100~350cN; when the filament bundle A or the filament bundle B is a black filament bundle, the light source is a lighting lamp with a color temperature of 4000~6500K and the illumination intensity is not less than 270lx light source. In other cases, the light source is a lighting lamp with a color temperature of 4000~6500K.

Take the production of black wire with a variety of 1000D and a specification of 1100dtex as an example; the dimensions selected for the equipment are: the length of the central cylinder is 27cm and the diameter is 3.5cm; the length of the front connecting rod is 6.3cm and the diameter is 1.0cm; the length of the rectangular plate is 40cm, the width is 2.0cm; the side length of the cross-section of the regular hexagonal prism is 10.0cm; the height of the regular hexagonal prism is 2.8cm; the specific usage process is as follows:

(1) Select standard sample:

The standard sample is a standard yarn, selected in continuous production, and sampled from the same batch number, same specification, and same product as the yarn to be tested; the same batch number, the same specification, and the same product means that the internal and external colors are the same, and the color of the entire spinning position reaches the color card level Level 5 products;

(2) Storage of standard samples:

Place it in the balancing room and wrap it in a bag for storage;

(3) Use the above-mentioned yarn colorimeter for colorimetric testing;

(3.1) Turn on the power switch 5. Before testing, check whether the number of turns on the display is 0, and use the clear key 9 to return it to 0; the rotation speed of the yarn frame 4 is 220r/min, and the winding length of the display control panel 10 is set to 150 turns, and the winding length is set to 150 turns through the tensioner. 2. Adjust the tension with the upper screw, control it at 180cN, and traverse the wire guide 3 with a swing period of 5 seconds;

(3.2) Place the yarn to be tested and the standard yarn on the corresponding wire car in order, lead out the yarn head, and introduce the yarn to the positioning pin of the yarn frame 4 through the yarn guide 1, the tensioner 2, and the traverse yarn guide 3. , and fixed;

(3.3) Click start button 7, motor I and motor II run. Motor I drives the central cylindrical yarn frame 4 to rotate, and synchronous motor II drives the traverse yarn guide 3 to swing at a constant speed, so that the filament bundle has tension and is wound around the yarn frame. 4, six planes with flat surfaces and moderate thickness are formed, and the tow strips formed by the silk tows are arranged in parallel; among them, the length of the tow strips formed by the silk to be tested and the standard silk are both 10.0cm, and the width is 2.8cm, thickness 0.25cm;

(3.4) Use a lighting lamp with a color temperature of 6000K and a light source with an illumination of 270lx to conduct visual observation. According to the "Gray Sample Card for Evaluating Discoloration", determine the color difference grade of the yarn to be tested and the standard yarn, thereby determining the online production raw yarn and standard Silk color difference grade.

As shown in Figures 3~4, (b) in Figure 3 and Figure 4 are both standard yarns. There is no color difference between (a) and (b) in Figure 3, so (a) is based on the "Gray Sample Card for Evaluating Discoloration" The evaluation level is level 5; the color difference between (a), (c) and (b) in Figure 4 is obvious. According to the "Gray Sample Card for Evaluating Discoloration", the evaluation level is 3-4, which cannot meet the requirements, so it needs to be compared with products without color difference. Differentiate packaging.

When the standard wire and the wire to be tested are white, use a lighting lamp with a color temperature of 6000K for comparison, as shown in Figures 5 to 6. Among them, (b) in Figure 5 and Figure 6 are both standard wires. You can see from Figure 5 There is no color difference between (b) the standard yarn and (a) the yarn to be tested, and the evaluation level is 4-5 according to the "Gray Sample Card for Evaluating Discoloration"; in Figure 6, there is no color difference between (a), (c) and the standard yarn. There is a clear color difference between black and white. According to the "Gray Sample Card for Evaluating Discoloration", the evaluation level is 1-2, and the product needs to be isolated and processed.

In the actual color comparison process, the tension, the running speed of the traverse yarn guide 3 and the yarn frame 4, the lighting, the number of winding turns, etc. will all affect the color contrast effect. For example, if the tension is too loose or too tight, the wound tow will be uneven, making it difficult to observe the color of the tow; the running speed of the traversing yarn guide 3 and the yarn frame 4 can ensure the uniformity of the tow, thus affecting the color comparison effect; In addition, different colors of tows require different lighting. For example, the color difference can be clearly observed using ordinary lighting (4000~6500K lighting) for white silk, while black silk needs to use lighting with a color temperature of 4000~6500K and an illumination of not less than Only with a light source of 270lx can the color difference be clearly observed; the number of turns has an impact on the thickness of the tow. A thinner thickness will cause light leakage, making the color difficult to observe, and a thicker thickness will cause waste.

Claims

A tow color comparison method, characterized by winding the tow A and the tow B respectively around a tow collecting device to form parallel tow A strips and tow B strips, and observing the tows under a light source The color difference between strip A and strip B, and determine the color difference grade of strip A and strip B according to the "Gray Sample Card for Evaluating Discoloration";

The tow collection device is a yarn frame. The shape and size of the yarn frame meet the following requirements: each tow becomes a hollow n-prism shape after being wound around the tow collection device, and except for the tows at n side positions of the n prisms, they are in contact with the yarn frame. , the tows at other positions are not in contact with the yarn frame, n is a positive integer greater than 2;

The length of the tow A strip and the tow B strip are not less than 9.5cm, the width is not less than 2.6cm, and the thickness is less than 0.5cm. The value range of the tension is 100~350cN; when the tow A or When the filament bundle B is a black filament bundle, the light source is a lighting lamp with a color temperature of 4000~6500K plus a light source with an illuminance of not less than 270lx. In other cases, the light source is a lighting lamp with a color temperature of 4000~6500K.
A tow color comparison method according to claim 1, characterized in that the tow A strips and the tow B strips have the same length, the same width, the same thickness, and the same tension.
A tow color comparison method according to claim 2, characterized in that the length of the tow A strip and the tow B strip is 9.5~10.5cm, the width is 2.6~3.0cm, and the thickness is 0.2~0.3 cm.
A yarn color comparison machine, including an equipment body, a yarn guide, a tensioner, a traverse yarn guide and a tow collection device, characterized in that the tow collection device is a yarn frame; the yarn frame includes n plates, n is a positive integer greater than 2, and n plates are distributed around the axis x; each n plate contains a set of opposite sides, namely side a and side b. Side b is farther from the axis x; The sides b of n plates constitute n sides of n prisms. The distance between two adjacent sides b is not less than 9.5cm, and the length of side b is not less than 5.2cm.
A yarn color comparison machine according to claim 4, characterized in that the n prisms are regular hexagonal prisms, the n plates are six rectangular plates of the same size, and the sides a and b are the long sides of the rectangular plates.
A yarn color comparison machine according to claim 5, wherein the yarn frame further includes a central cylinder, six rear connecting rods with the same shape and size, and six front connecting rods with the same shape and size; The side connecting rods are the same shape and size as the front side connecting rods;

One end of the central cylinder is the connecting end, which is connected to the motor I in the main body of the equipment. The motor I controls it to rotate around its own central axis, and the other end is the non-connecting end;

The axis x is the central axis of the central cylinder;

Six rear connecting rods are evenly distributed around the central cylinder along its radial circumference and close to the connecting end of the central cylinder; six front connecting rods are evenly distributed around the central cylinder along its radial circumference and close to the non-connecting end of the central cylinder; six The orthographic projections of the rear connecting rods and the six front connecting rods on a plane perpendicular to the central cylinder completely coincide;

One end of the rear connecting rod and the front connecting rod is connected to the peripheral surface of the central cylinder, and the other end is connected to the side a of the rectangular plate.
A yarn color comparison machine according to claim 6, characterized in that the length of the rectangular plate is 39~41cm and the width is 1.95~2.05cm; the length of the front connecting rod is 6.2~6.4cm and the diameter is 0.9 ~1.1cm; the length of the central cylinder is 26~28cm and the diameter is 3~4cm.
A yarn color comparison machine according to claim 6, characterized in that a rectangular plate of the yarn frame is provided with a positioning pin for fixing the filament head.
A yarn color comparison machine according to claim 6, characterized in that the traverse yarn guide is composed of a horizontal bar and a plurality of pig tail porcelain pieces; the number of the plurality of pig tail porcelain pieces is more than two ; Multiple pig tail porcelain pieces are arranged at equal intervals along the length direction of the crossbar of the traversing wire guide, and the lower end is connected to the crossbar of the traversing wire guide at the same time; one end of the crossbar of the traversing wire guide is the connection end , connected to the motor II in the main body of the equipment, and the motor II controls its reciprocating movement in the transverse direction, and the other end is the non-connected end; the structure of the yarn guide is the same as that of the traversing yarn guide; the central cylinder of the yarn frame, the traversing yarn guide The central axes of the crossbar and the crossbar of the wire guide are parallel to each other; the main body of the equipment is installed on the equipment base, and a bracket is fixed vertically on the equipment base. One end of the crossbar of the wire guide is the connecting end and is fixed to the bracket. connected, and the other end is the non-connected end.
A yarn color comparison machine according to claim 9, characterized in that the tensioner is composed of a horizontal bar, a plurality of vertical bars, a plurality of metal clips, a plurality of springs and a plurality of screws; a plurality of vertical bars The number of rods, multiple metal clips, multiple springs and multiple screws is more than two; multiple vertical rods are arranged at equal intervals along the length direction of the tensioner's crossbar, and the lower ends are simultaneously connected to the tensioner's crossbar ; One end of the crossbar of the tensioner is the connecting end, which is fixedly connected to the main body of the equipment, and the other end is the non-connecting end; each vertical bar is equipped with a screw, two metal clips and a spring from top to bottom. The screw is threadedly connected to the vertical rod; the central cylinder of the yarn frame and the central axis of the horizontal rod of the tensioner are parallel to each other.