Preparation method of color spinning fancy yarn sample, cotton sliver sample weaving machine and twister

Abstract

The high-efficiency low-consumption accurate preparation method of the color spinning fancy yarn sample with the controllable trace fiber structure comprises the following steps: S1, layering treatment of trace raw materials: weighing a group A raw material and a group B raw material according to a target fancy of the color spinning fancy yarn sample; s2, performing fiber orientation control on the group A raw material and the group B raw material: laying the group A raw material in layers to form a first cotton layer, and laying the group B raw material in layers to form a second cotton layer; the first cotton layer and the second cotton layer are subjected to 5-10 times of directional drafting, the fiber orientation angles of the first cotton layer and the second cotton layer are controlled to be smaller than or equal to 15 degrees, and first cotton slivers and second cotton slivers are output; s3, fancy directional construction: according to the target fancy of the color spinning fancy yarn sample, spinning the first cotton slivers and the second cotton slivers into roving of the color spinning fancy yarn sample corresponding to the target fancy; and S4, spinning of the color-spun fancy yarn sample: drafting the roving, and spinning the color-spun fancy yarn sample corresponding to the target fancy. According to the invention, raw materials can be saved, proofing is rapid, and proofing efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of the textile industry, and in particular to a method for preparing a small sample of color-spun fancy yarn with controllable micro-fiber structure with high efficiency, low consumption and high precision, a small sample machine for cotton slivers and a handheld pneumatic twister. Background Art

[0002] Colored spun fancy yarn is a type of colored yarn produced by dyeing fibers before spinning. Color matching and sampling is a crucial step in the production of colored fancy yarn. Manufacturers must produce a sample of the colored fancy yarn that meets the customer's color, style, and quality requirements based on the customer's specified color.

[0003] Traditional colored spun fancy yarns require more than 500g of raw materials, which are spun by large equipment into colored spun fancy yarn samples for color matching and proofing. However, they have the following defects:

[0004] (1) Trace raw materials are difficult to mix: Raw materials with a total amount of less than 5g are prone to entanglement and delamination during the spinning process of color-spun fancy yarn samples;

[0005] (2) The patterns of color-spun fancy yarn samples rely on manual experience: the hand twist has large fluctuations (CV ≥ 15%), and the reproducibility of checkered patterns, colorful patterns, and striped patterns is poor;

[0006] (3) Lengthy color matching process: The color matching process is long, inefficient, requires many times, and results in a high rate of raw material waste (>30%).

[0007] (4) The late stage of color-spun fancy yarn sampling is long: the whole process from preparing the color-spun fancy yarn sample to completing the color sampling takes more than 72 hours.

[0008] In recent years, customers have higher and higher requirements for the color and style of colored spun fancy yarns, and the difficulty of color matching and proofing has also become greater. As a result, manufacturers have long color matching time, low color matching efficiency, and many color matching times in the color matching and proofing process, which seriously affects the delivery time. At the same time, many color matching times lead to many proofing times (many times of preparing small samples of colored spun fancy yarns), which leads to a large waste of raw materials and even affects the quality of colored spun fancy yarns. Summary of the Invention

[0009] The present invention provides a method for preparing small samples of color-spun fancy yarn with controllable micro-fiber structure with high efficiency, low consumption and high precision, a small sample machine for cotton slivers and a handheld pneumatic twister, so as to solve the technical problems of the existing color-spun fancy yarn color matching and proofing process, such as long color matching time, low color matching efficiency and many color matching times.

[0010] The technical solutions provided by the present invention are as follows:

[0011] One object of the present invention is to provide a method for preparing a small sample of color-spun fancy yarn with controllable micro-fiber structure with high efficiency, low consumption and high precision, the preparation method comprising:

[0012] S1. Layered processing of trace raw materials: weigh group A and group B raw materials according to the target pattern of the colored spun fancy yarn sample;

[0013] Wherein, the target pattern of the colored spun fancy yarn sample is a checkered pattern, a colorful pattern or a striped pattern;

[0014] Among them, the raw materials of group A are combed colored cotton, or a blend of combed colored cotton and chemical fiber, or mixed color cellulose fiber;

[0015] The raw materials for Group B are combed white cotton, or a blend of combed white cotton and chemical fiber, or mixed color cellulose fiber;

[0016] S2. Control the fiber orientation of the raw materials of group A and group B: lay the raw materials of group A in layers to form a first cotton layer, and lay the raw materials of group B in layers to form a second cotton layer;

[0017] Directing and drafting the first cotton layer and the second cotton layer 5 to 10 times respectively, controlling the fiber orientation angles of the first cotton layer and the second cotton layer to be ≤15°, and outputting a first cotton sliver and a second cotton sliver;

[0018] S3, pattern directional construction: spinning the first cotton sliver and the second cotton sliver into roving of the color-spun fancy yarn sample corresponding to the target pattern according to the target pattern of the color-spun fancy yarn sample;

[0019] S4. Spinning a color-spun fancy yarn sample: drafting the roving of the color-spun fancy yarn sample corresponding to the target pattern to spin the color-spun fancy yarn sample corresponding to the target pattern.

[0020] In a preferred embodiment, in step S1, the types of raw materials in group A and group B are determined according to the target pattern of the colored spun fancy yarn sample:

[0021] When the target pattern of the color-spun fancy yarn sample is a checkered pattern, the raw materials of group A are combed colored cotton and the raw materials of group B are combed white cotton;

[0022] When the target fancy pattern of the color-spun fancy yarn sample is a colorful fancy pattern, the raw materials of group A are a blend of combed colored cotton and chemical fiber, and the raw materials of group B are a blend of combed white cotton and chemical fiber;

[0023] When the target fancy pattern of the color-spun fancy yarn sample is a striped pattern, the raw materials of group A are mixed color cellulose fibers, and the raw materials of group B are mixed color cellulose fibers.

[0024] In a preferred embodiment, in step S2, a sliver sample machine is used to control the fiber orientation of the raw materials of group A and group B;

[0025] The sliver prototype machine includes at least an input roller and an output roller, and the distance between the input roller and the output roller is determined according to the types of the raw materials of group A and group B:

[0026] When group A uses combed colored cotton as raw material and group B uses combed white cotton as raw material, the distance between the input roller and the output roller is 32-35mm.

[0027] When the raw materials of group A are a mixture of combed colored cotton and chemical fiber, and the raw materials of group B are a mixture of combed white cotton and chemical fiber, the distance between the input roller and the output roller is: 33-42mm;

[0028] When the raw materials of group A are mixed color cellulose fibers and the raw materials of group B are mixed color cellulose fibers, the distance between the input roller and the output roller is 40 to 45 mm.

[0029] In a preferred embodiment, in step S3, when the target pattern of the color-spun fancy yarn sample is a checkered pattern, the roving of the color-spun fancy yarn sample corresponding to the checkered pattern is spun according to the following method:

[0030] The first cotton sliver is drafted and twisted to be spun into a first roving corresponding to the color-spun fancy yarn sample of the checkered pattern;

[0031] The second cotton sliver is drafted and twisted to be spun into a second roving corresponding to the color-spun fancy yarn sample of the checkered pattern;

[0032] In step S4, when the target pattern of the color-spun fancy yarn sample is a checkered pattern, the first roving and the second roving are composite-drafted to be spun into a color-spun fancy yarn sample corresponding to the checkered pattern.

[0033] In a preferred embodiment, in step S3, when the target pattern of the color-spun fancy yarn sample is the colorful pattern, the roving of the color-spun fancy yarn sample corresponding to the colorful pattern is spun according to the following method:

[0034] The second cotton sliver is drafted and twisted to be spun into a third roving corresponding to the color-spun fancy yarn sample of the overflowing color pattern;

[0035] The first cotton sliver and the third roving are drafted and twisted together to spin into a fourth roving corresponding to the color-spun fancy yarn sample of the overflowing color pattern;

[0036] In step S4, when the target pattern of the color-spun fancy yarn sample is an overflowing color pattern, the four rovings are drafted and spun into a color-spun fancy yarn sample corresponding to the overflowing color pattern.

[0037] In a preferred embodiment, in step S3, when the target pattern of the color-spun fancy yarn sample is a striped pattern, the roving of the color-spun fancy yarn sample corresponding to the striped pattern is spun according to the following method:

[0038] After parallel drafting the first cotton sliver and the second cotton sliver side by side, a third cotton sliver is obtained;

[0039] Twisting the third cotton sliver to form a fifth roving of the color-spun fancy yarn sample corresponding to the stripe pattern;

[0040] In step S4, when the target pattern of the color-spun fancy yarn sample is a stripe pattern, the five rovings are drafted and spun into a color-spun fancy yarn sample of the corresponding stripe pattern.

[0041] Another object of the present invention is to provide a sliver prototype machine, the sliver prototype machine comprising:

[0042] An input roller and an input top roller, wherein the input roller and the input top roller form an input end;

[0043] An output roller and an output roller, wherein the output roller and the output roller form an output end;

[0044] The distance between the input end and the output end is adjustable;

[0045] A collecting velvet roller, which is detachably arranged at an output end formed by the output roller and the output roller;

[0046] The distance ruler is used to measure the distance between the input end and the output end.

[0047] In a preferred embodiment, the sliver prototype machine further comprises: a first pressure spring and a second pressure spring;

[0048] The first pressure spring is used to apply input roller pressure to the input roller;

[0049] The second pressure spring is used to apply output roller pressure to the output roller.

[0050] Another object of the present invention is to provide a handheld pneumatic twister, which comprises a micro air pump, a silicone twisting groove and a twisting nozzle;

[0051] The twisting nozzle is connected to the silicone twist groove; the micro air pump is connected to the silicone twist groove and is used to apply twisting air pressure to the silicone twist groove to drive the silicone twist groove to rotate.

[0052] In a preferred embodiment, the handheld pneumatic twister further includes a twist controller;

[0053] The twist controller is used to control the twist of the silicone twist groove.

[0054] The above technical solution of the present invention has at least the following beneficial effects compared with the prior art:

[0055] The present invention provides a method for preparing a small sample of color-spun fancy yarn with controllable micro-fiber structure with high efficiency, low consumption and high precision, a small sample machine of cotton sliver and a handheld air pressure twister. The color-spun fancy yarn sampling link can realize the preparation of the color-spun fancy yarn sample using 0.5-1g of micro-raw materials, and reduce the technical difficulties of uneven color mixing and uncontrollable target pattern in the process of preparing the color-spun fancy yarn sample using micro-raw materials (0.5-1g).

[0056] The present invention provides a method for preparing small samples of color-spun fancy yarn with controllable micro-fiber structure with high efficiency, low consumption and high precision, a sliver sample machine and a handheld pneumatic twister. The roving spinning process involves twisting the first sliver and the second sliver separately, twisting the second sliver to spin the third roving and then twisting it after composite drafting with the first sliver, and twisting the first sliver and the second sliver after drafting side by side. This breaks through the traditional single blended fancy directional construction and realizes the efficient, low consumption and precise preparation of small samples of color-spun fancy yarn with high-end fancy patterns such as checkered patterns, colorful patterns and striped patterns.

[0057] The present invention provides a method for preparing small samples of color-spun fancy yarn with controllable micro-fiber structure in an efficient, low-consumption and precise manner, a cotton sliver sample machine and a handheld pneumatic twister, which can realize efficient, low-consumption and precise preparation of small samples of color-spun fancy yarn with high-end fancy patterns such as lattice patterns, colorful patterns and striped patterns, effectively reduce the color matching time in the color-spun fancy yarn proofing link, improve the color matching efficiency, reduce the number of color matching times, thereby saving raw material consumption, quickly proofing, improving proofing efficiency and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0059] Figure 1 This is a real-life rendering of the process for preparing a sample of a colored spun fancy yarn in Example 1 of the present invention.

[0060] Figure 2 It is a structural schematic diagram of the sliver prototype of the present invention.

[0061] Figure 3 It is a structural schematic diagram of the handheld pneumatic twister of the present invention.

[0062] Figure 4It is a structural schematic diagram of the yarn sample card of the present invention.

[0063] Figure 5 This is a real-life rendering of the process for preparing a sample of a colored spun fancy yarn in Example 2 of the present invention.

[0064] Figure 6 This is a real-life rendering of the process for preparing a sample of a colored spun fancy yarn in Example 3 of the present invention.

[0065] Figure 7 This is a real-life rendering of the colored spun fancy yarn samples prepared in Example 1, Example 2, and Example 3 of the present invention being wound onto a yarn sample card. DETAILED DESCRIPTION

[0066] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0067] Unless otherwise defined, the technical or scientific terms used in the present invention shall have the usual meaning understood by persons of ordinary skill in the field to which the present invention belongs. The words "first", "second" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one", "an" or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. Words such as "include" or "comprise" mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0068] It should be noted that the terms "up", "down", "left", "right", "front" and "back" used in the present invention are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0069] Example 1.

[0070] According to an embodiment of the present invention, a method for preparing a small sample of color-spun fancy yarn with controllable micro-fiber structure with high efficiency, low consumption and high precision is provided, comprising:

[0071] Step S1, layered processing of trace raw materials: According to the target pattern of the color-spun fancy yarn sample, weigh the raw materials of group A and group B. The weight of the raw materials of group A is 0.25-0.5 g, the weight of the raw materials of group B is 0.25-0.5 g, and the total weight of the raw materials of group A and group B is 0.5-1 g.

[0072] Among them, the target pattern of the color-spun fancy yarn sample is a checkered pattern, an overflowing color pattern or a striped pattern.

[0073] The raw materials of Group A are combed colored cotton, or a blend of combed colored cotton and chemical fiber, or mixed color cellulose fiber.

[0074] The raw materials of group B are combed white cotton, or a blend of combed white cotton and chemical fiber, or mixed color cellulose fiber.

[0075] Specifically, the types of raw materials in group A and group B are determined according to the target pattern of the colored fancy yarn sample:

[0076] When the target pattern of the color-spun fancy yarn sample is a checkered pattern, the raw materials of group A are combed colored cotton and the raw materials of group B are combed white cotton.

[0077] When the target fancy pattern of the color-spun fancy yarn sample is the colorful fancy pattern, the raw materials of group A are the mixed fibers of combed colored cotton and chemical fibers, and the raw materials of group B are the mixed fibers of combed white cotton and chemical fibers.

[0078] When the target fancy pattern of the color-spun fancy yarn sample is a striped pattern, the raw materials of group A are mixed color cellulose fibers, and the raw materials of group B are mixed color cellulose fibers.

[0079] In this embodiment, the target pattern of the color-spun fancy yarn sample is a checkered pattern, and the raw materials of group A are combed colored cotton (100% cotton): 0.4g of Baolan cotton fine mesh and 0.1g of special black cotton fine mesh.

[0080] The raw materials of group B are combed white cotton (100% cotton): 0.2g of white cotton net and 0.3g of extra black cotton net.

[0081] Step S2, controlling the fiber orientation of the raw materials of group A and group B: laying the raw materials of group A in layers to form a first cotton layer, and laying the raw materials of group B in layers to form a second cotton layer.

[0082] like Figure 1 As shown, in this embodiment, the raw materials of group A are laid in layers to form a first cotton layer AM, and the raw materials of group B are laid in layers to form a second cotton layer BM.

[0083] Next, hold one end of the raw material in Group A with your left hand, stretch it with your right hand, and then lay it flat on the workbench, layering it into a first cotton layer AM of 20 cm × 5 cm. Hold one end of the raw material in Group B with your left hand, stretch it with your right hand, and then lay it flat on the workbench, layering it into a second cotton layer BM of 20 cm × 5 cm.

[0084] The first cotton layer AM and the second cotton layer BM are respectively subjected to directional drafting for 5 to 10 times, and the fiber orientation angles of the first cotton layer AM and the second cotton layer BM are controlled to be ≤15°, and the first cotton sliver AL and the second cotton sliver BL are output.

[0085] like Figure 2 As shown, the present invention provides a sliver sample machine 100 for a method for efficiently, low-cost, and accurately preparing a small sample of a color-spun fancy yarn with a controllable micro-fiber structure. The sliver sample machine 100 includes:

[0086] The input roller 101 and the input roller 102 form an input end; the output roller 103 and the output roller 104 form an output end; and the distance between the input end and the output end is adjustable.

[0087] The collecting velvet roller 106 is detachably arranged at the output end formed by the output roller 103 and the output leather roller 104 .

[0088] The spacing ruler 105 is used to measure the distance between the input end and the output end.

[0089] The first pressure spring 107 is used to apply input roller pressure to the input roller 101 ; the second pressure spring 108 is used to apply output roller pressure to the output roller 103 .

[0090] The first pressure spring 107 of the present invention applies an input roller pressure of 10 to 15 N to the input roller 101 ; the second pressure spring 108 applies an output roller pressure of 15 to 20 N to the output roller 103 .

[0091] In step S2, the present invention uses the sliver sample machine 100 to control the fiber orientation of the raw materials of group A and group B.

[0092] The distance between the input roller 101 and the output roller 103 of the sliver prototype machine 100 is determined according to the types of the raw materials of group A and group B:

[0093] When the raw materials of group A are combed colored cotton and the raw materials of group B are combed white cotton, the distance between the input roller 101 and the output roller 103 is 32 to 35 mm.

[0094] When the raw materials of group A are a mixture of combed colored cotton and chemical fiber, and the raw materials of group B are a mixture of combed white cotton and chemical fiber, the distance between the input roller 101 and the output roller 103 is 33-42 mm.

[0095] When the raw materials of group A are mixed color cellulose fibers and the raw materials of group B are mixed color cellulose fibers, the distance between the input roller 101 and the output roller 103 is 40-45 mm.

[0096] In this embodiment, the target pattern of the colored spun fancy yarn sample is a checkered pattern. The raw materials of group A are combed colored cotton, and the raw materials of group B are combed white cotton. By adjusting the distance between the input end and the output end, the distance between the input roller 101 and the output roller 103 is 33 mm.

[0097] Specifically, the distance between the input end and the output end is measured by the spacing ruler 105, and the distance between the input end and the output end is adjusted so that the distance between the input roller 101 and the output roller 103 is 33 mm.

[0098] like Figure 1 As shown, in this embodiment, the first cotton layer AM and the second cotton layer BM are respectively subjected to directional stretching 5 to 10 times, the fiber orientation angles of the first cotton layer AM and the second cotton layer BM are controlled to be 12°, and the first cotton sliver AL and the second cotton sliver BL are output.

[0099] Specifically, the first cotton layer AM is input into the input roller 101 of the sliver prototype machine 100 (the gap between the input roller 101 and the input leather roller 102), output through the output roller 103 of the sliver prototype machine 100 (the gap between the output roller 103 and the output leather roller 104), and is directionally drafted and mixed at the collecting pile roller 106. The drafted first cotton layer AM is removed from the collecting pile roller 106, and this process is repeated 5 to 10 times until the fiber orientation angle of the group A raw materials of the first cotton layer AM is fully mixed to 12°, and the first sliver AL is output.

[0100] The second cotton layer BM is input into the input roller 101 of the sliver sample machine 100, output through the output roller 103 of the sliver sample machine 100, and subjected to orientation drafting and mixing at the collecting pile roller 106. The drafted second cotton layer BM is removed from the collecting pile roller 106. This process is repeated 5 to 10 times until the fiber orientation angle of the group B raw materials in the second cotton layer BM is fully mixed to 12°, and the second cotton sliver BL is output.

[0101] During the directional stretching of the first cotton layer AM and the second cotton layer BM by the above-mentioned sliver prototype machine 100, the linear speed ratio of the input roller 101 and the output roller 103 is 1:4.

[0102] Step S3, pattern directional construction: according to the target pattern of the color-spun fancy yarn sample, the first cotton sliver AL and the second cotton sliver BL are spun into roving of the color-spun fancy yarn sample corresponding to the target pattern.

[0103] like Figure 1As shown, in this embodiment, the target pattern of the color-spun fancy yarn sample is a checkered pattern, and the roving of the color-spun fancy yarn sample corresponding to the checkered pattern is spun according to the following method:

[0104] The first sliver AL is stretched and twisted to be spun into a first roving AC of a color-spun fancy yarn sample corresponding to the checkered pattern.

[0105] The second sliver BL is drafted and twisted to be spun into a second roving BC of a color-spun fancy yarn sample corresponding to the checkered pattern.

[0106] like Figure 3 As shown, the present invention provides a handheld pneumatic twister 200 for producing micro-sized, color-spun fancy yarn samples with controllable micro-fiber structure, with high efficiency, low consumption, and high precision. The handheld pneumatic twister 200 includes a micro air pump 201, a twist controller 202, a silicone twist groove 203, a twisting nozzle 204, and a parameter encoder 205.

[0107] The twisting nozzle 204 is connected to the silicone twisting groove 203. The micro air pump 201 is connected to the silicone twisting groove 203 and is used to apply twisting air pressure to the silicone twisting groove 203 to drive the silicone twisting groove 203 to rotate.

[0108] The twist controller 202 is used to control the twist of the silicone twist groove 203. The parameter encoder 205 is used to display the twisting air pressure applied by the micro air pump 201 to the silicone twist groove 203 and to lock the twist of the silicone twist groove 203.

[0109] The micro air pump 201 of the handheld air pressure twister 200 of the present invention applies a twisting air pressure range of 0.2 to 0.5 MPa to the silicone twist groove 203, the twist range of the silicone twist groove 203 is 3 to 5 twists / cm, the error accuracy of the silicone twist groove 203 is ±0.1 twist / cm, and the adaptable diameter of the twisting nozzle 204 is 0.5 to 1.2 cm.

[0110] The present invention uses a sliver sample machine 100 and a handheld pneumatic twister 200 to spin roving of a color-spun fancy yarn sample corresponding to a target fancy style.

[0111] Combine Figures 1 to 3 In this embodiment, a sliver sample machine 100 and a handheld air pressure twister 200 are used to spin roving of a color-spun fancy yarn sample corresponding to a checkered pattern.

[0112] The collecting lint roller 106 of the sliver sample machine 100 is removed, and the handheld pneumatic twister 200 is placed on the output roller 104 of the sliver sample machine 100, with the twisting mouth 204 of the handheld pneumatic twister 200 facing the output roller 104 of the sliver sample machine 100.

[0113] The micro air pump 201 is adjusted so that the twisting air pressure applied by the micro air pump 201 to the silicone twist groove 203 is 0.3 MPa, and the twist of the silicone twist groove 203 is locked to 4 twists / cm through the parameter encoder 205.

[0114] After the first sliver AL is stretched through the input roller 101 and the output roller 103 of the sliver sample machine 100, it is fed into the silicone twisting groove 203 by the twisting mouth 204 of the handheld pneumatic twister 200 at the output roller 104 of the sliver sample machine 100. The silicone twisting groove 203 twists the first sliver AL and spins it into the first coarse yarn AC of the color-spun fancy yarn sample corresponding to the grid pattern.

[0115] After the second sliver BL is stretched by the input roller 101 and the output roller 103 of the sliver sample machine 100, it is fed into the silicone twisting groove 203 by the twisting mouth 204 of the handheld pneumatic twister 200 at the output roller 104 of the sliver sample machine 100. The silicone twisting groove 203 twists the second sliver BL and spins it into the second roving BC of the color-spun fancy yarn sample corresponding to the grid pattern.

[0116] The spun first roving AC and the second roving BC have a length of 30 to 60 cm, are uniform in thickness and have a certain twist.

[0117] Step S4, spinning a color-spun fancy yarn sample: drafting the roving of the color-spun fancy yarn sample corresponding to the target pattern, and spinning the roving into the color-spun fancy yarn sample corresponding to the target pattern.

[0118] like Figure 1 As shown, in this embodiment, the target pattern of the color-spun fancy yarn sample is a checkered pattern, and the first roving AC and the second roving BC are compositely drafted to be spun into a color-spun fancy yarn sample D (spun yarn) corresponding to the checkered pattern.

[0119] Specifically, a small spinning sample machine is used to composite-draft the first roving AC and the second roving BC at a speed ratio of 1:4 to 1:6 to spin a color-spun fancy yarn sample D (spinning yarn) of a corresponding checkered pattern.

[0120] The spinning count of the color-spun fancy yarn sample corresponding to the target pattern spun by the present invention is 10 to 60S (spinning count). In this embodiment, the spinning count of the color-spun fancy yarn sample D (spinning yarn) corresponding to the checkered pattern is 30S (spinning count), and the length of the color-spun fancy yarn sample D (spinning yarn) corresponding to the checkered pattern is 10 to 50M.

[0121] The spun yarn sample machine of the present invention is not specifically limited. Those skilled in the art can use the existing spun yarn sample machine to spin roving into a color-spun fancy yarn sample D (spun yarn) with a corresponding checkered pattern.

[0122] The present invention winds the colored spun fancy yarn sample corresponding to the target fancy style onto the yarn sample card 300 for color matching and proofing. Figure 4 As shown, the yarn sample card 300 has a plurality of yarn threading holes 301.

[0123] Specifically, a sample of the colored spun fancy yarn corresponding to the target fancy pattern is passed through a yarn threading hole 301 of the yarn sample card 300 and wound onto the yarn sample card 300 .

[0124] Carry out color matching and proofing on the sample of the colored spun fancy yarn corresponding to the target fancy style:

[0125] Manual color matching: Under D65 light source, more than three technicians compare the checkered fancy yarn sample D with the color card provided by the customer, and more than three technicians are required to judge it as qualified (i.e. color difference acceptance rate = 100%).

[0126] Instrument color matching: Use a spectrophotometer to scan a sample of the colored spun fancy yarn corresponding to the target pattern, obtain the CIELab value, and calculate the color difference value ΔE, which is required to be ≤1.0.

[0127] When both the manual color matching result and the instrument color matching result are qualified, the colored spun fancy yarn sample corresponding to the target fancy pattern is judged to be qualified, and the manual color matching result and the instrument color matching result are stored.

[0128] like Figure 7 As shown, in this embodiment, the spun lattice fancy yarn sample D is passed through a yarn threading hole 301 of the yarn sample card 300 and wound onto the yarn sample card 300 .

[0129] Color matching and proofing of the checkered fancy yarn sample D:

[0130] Manual color matching: Under D65 light source, three technicians compared the checkered fancy yarn sample D with the color card provided by the customer, and all three technicians judged it to be qualified (color difference acceptance rate = 100%).

[0131] Instrument color matching: A spectrophotometer was used to scan a sample of a color-spun fancy yarn with a checkered pattern to obtain CIE Lab values and calculate the color difference ΔE, which was ΔE=0.7.

[0132] The judgment result obtained by manual color matching (color difference acceptance rate = 100%) and the result obtained by instrument color matching (color difference value ΔE = 0.7) are stored.

[0133] Example 2.

[0134] The difference between this embodiment and the first embodiment is that the target pattern of the color-spun fancy yarn sample is a colorful pattern.

[0135] According to an embodiment of the present invention, a method for preparing a small sample of color-spun fancy yarn with controllable micro-fiber structure with high efficiency, low consumption and high precision is provided, comprising:

[0136] Step S1, layered processing of trace raw materials: weighing raw materials of group A and group B according to the target pattern of the color-spun fancy yarn sample.

[0137] In this embodiment, the target fancy pattern of the color-spun fancy yarn sample is the colorful fancy pattern, and the raw materials of group A are a blend of combed colored cotton and chemical fiber (60% cotton, 40% polyester fiber): 0.3g of Baolan cotton fine mesh and 0.2g of black polyester fiber.

[0138] The raw materials of group B are a blend of combed white cotton and chemical fiber (60% cotton, 40% polyester fiber): 0.3g of white cotton net and 0.2g of white polyester fiber.

[0139] Step S2, controlling the fiber orientation of the raw materials of group A and group B: laying the raw materials of group A in layers to form a first cotton layer, and laying the raw materials of group B in layers to form a second cotton layer.

[0140] like Figure 5 As shown, in this embodiment, the raw materials of group A are laid in layers to form a first cotton layer AM, and the raw materials of group B are laid in layers to form a second cotton layer BM.

[0141] Next, hold one end of the raw material in Group A with your left hand, stretch it with your right hand, and then lay it flat on the workbench, layering it into a first cotton layer AM of 20 cm × 5 cm. Hold one end of the raw material in Group B with your left hand, stretch it with your right hand, and then lay it flat on the workbench, layering it into a second cotton layer BM of 20 cm × 5 cm.

[0142] The first cotton layer AM and the second cotton layer BM are respectively subjected to directional drafting for 5 to 10 times, and the fiber orientation angles of the first cotton layer AM and the second cotton layer BM are controlled to be ≤15°, and the first cotton sliver AL and the second cotton sliver BL are output.

[0143] In step S2, the present invention uses the sliver sample machine 100 to control the fiber orientation of the raw materials of group A and group B.

[0144] In this embodiment, the target fancy pattern of the colored spun fancy yarn sample is the colorful fancy pattern. The raw materials of group A are a mixture of combed colored cotton and chemical fiber, and the raw materials of group B are a mixture of combed white cotton and chemical fiber. By adjusting the distance between the input end and the output end, the distance between the input roller 101 and the output roller 103 is 40 mm.

[0145] like Figure 5 As shown, in this embodiment, the first cotton layer AM and the second cotton layer BM are respectively subjected to directional stretching 5 to 10 times, the fiber orientation angle of the first cotton layer AM and the second cotton layer BM is controlled to be 10°, and the first cotton sliver AL and the second cotton sliver BL are output.

[0146] Specifically, the first cotton layer AM is input into the input roller 101 of the sliver prototype machine 100 (the gap between the input roller 101 and the input leather roller 102), output through the output roller 103 of the sliver prototype machine 100 (the gap between the output roller 103 and the output leather roller 104), and is directionally drafted and mixed at the collecting pile roller 106. The drafted first cotton layer AM is removed from the collecting pile roller 106, and this process is repeated 5 to 10 times until the fiber orientation angle of the group A raw materials of the first cotton layer AM is fully mixed to 10 degrees, and the first sliver AL is output.

[0147] The second cotton layer BM is input into the input roller 101 of the sliver prototype machine 100, output through the output roller 103 of the sliver prototype machine 100, and subjected to orientation drafting and mixing at the collecting pile roller 106. The drafted second cotton layer BM is removed from the collecting pile roller 106. This process is repeated 5 to 10 times until the fiber orientation angle of the group B raw materials in the second cotton layer BM is fully mixed to 10 degrees, and the second cotton sliver BL is output.

[0148] During the directional stretching of the first cotton layer AM and the second cotton layer BM by the above-mentioned sliver prototype machine 100, the linear speed ratio of the input roller 101 and the output roller 103 is 1:5.

[0149] Step S3, pattern directional construction: according to the target pattern of the color-spun fancy yarn sample, the first cotton sliver AL and the second cotton sliver BL are spun into roving of the color-spun fancy yarn sample corresponding to the target pattern.

[0150] like Figure 5 As shown, in this embodiment, the target pattern of the color-spun fancy yarn sample is the colorful pattern, and the roving of the color-spun fancy yarn sample corresponding to the colorful pattern is spun according to the following method:

[0151] The second sliver BL is drafted and twisted to be spun into a third roving BE of a color-spun fancy yarn sample corresponding to the colorful pattern.

[0152] The first sliver AL and the third roving BE are drafted and twisted to be spun into a fourth roving F corresponding to a color-spun fancy yarn sample of the overflowing color pattern.

[0153] The present invention uses a sliver sample machine 100 and a handheld pneumatic twister 200 to spin roving of a color-spun fancy yarn sample corresponding to a target fancy style.

[0154] Combine Figure 2 、 Figure 3 and Figure 5 In this embodiment, a sliver sample machine 100 and a handheld air pressure twister 200 are used to spin roving of a color-spun fancy yarn sample corresponding to the colorful style.

[0155] The collecting lint roller 106 of the sliver sample machine 100 is removed, and the handheld pneumatic twister 200 is placed on the output roller 104 of the sliver sample machine 100, with the twisting mouth 204 of the handheld pneumatic twister 200 facing the output roller 104 of the sliver sample machine 100.

[0156] The micro air pump 201 is adjusted so that the twisting air pressure applied by the micro air pump 201 to the silicone twist groove 203 is 0.3 MPa, and the twist of the silicone twist groove 203 is locked to 3 twists / cm through the parameter encoder 205.

[0157] After the second sliver BL is stretched through the input roller 101 and the output roller 103 of the sliver sample machine 100, it is fed into the silicone twisting groove 203 by the twisting mouth 204 of the handheld pneumatic twister 200 at the output roller 104 of the sliver sample machine 100. The silicone twisting groove 203 twists the second sliver BL and spins it into the third roving BE of the color-spun fancy yarn sample corresponding to the colorful pattern.

[0158] The micro air pump 201 is adjusted so that the twisting air pressure applied by the micro air pump 201 to the silicone twist groove 203 is 0.4 MPa, and the twist of the silicone twist groove 203 is locked to 4 twists / cm through the parameter encoder 205.

[0159] After the first sliver AL and the third roving BE are simultaneously stretched by the input roller 101 and the output roller 103 of the sliver sample machine 100, they are sent into the silicone twisting groove 203 by the twisting mouth 204 of the handheld pneumatic twister 200. The silicone twisting groove 203 twists the first sliver AL and the third roving BE and spins them into the fourth roving F of the color-spun fancy yarn sample corresponding to the colorful pattern.

[0160] The fourth spun roving F has a length of 30 to 60 cm, is uniform in thickness and has a certain twist.

[0161] Step S4, spinning a color-spun fancy yarn sample: drafting the roving of the color-spun fancy yarn sample corresponding to the target pattern, and spinning the roving into the color-spun fancy yarn sample corresponding to the target pattern.

[0162] like Figure 5 As shown, in this embodiment, the target pattern of the color-spun fancy yarn sample is the colorful pattern, and the fourth roving F is drafted and spun into the color-spun fancy yarn sample G (spun yarn) corresponding to the colorful pattern.

[0163] Specifically, a small spinning sample machine is used to draft the fourth roving F at a speed ratio of 1:4 to 1:6 to spin it into a color-spun fancy yarn sample G (spinning yarn) corresponding to the colorful pattern.

[0164] The spinning count of the color-spun fancy yarn sample corresponding to the target pattern spun by the present invention is 10 to 60S (spinning count). In this embodiment, the spinning count of the color-spun fancy yarn sample G (spinning yarn) corresponding to the colorful pattern spun is 20S (spinning count), and the length of the color-spun fancy yarn sample G (spinning yarn) corresponding to the colorful pattern is 10 to 50M.

[0165] The small sample machine of the spun yarn of the present invention is not specifically limited. Those skilled in the art can use the existing small sample machine of spun yarn to spin roving into a color-spun fancy yarn sample G (spun yarn) corresponding to the colorful pattern.

[0166] like Figure 7 As shown, in this embodiment, the spun fancy yarn sample G with a colorful pattern is passed through a yarn threading hole 301 of the yarn sample card 300 and wound onto the yarn sample card 300 .

[0167] Color matching and proofing of the colorful fancy yarn sample G:

[0168] Manual color matching: Under D65 light source, three technicians compared the colorful fancy yarn sample G with the color card provided by the customer, and all three technicians judged it as qualified (color difference acceptance rate = 100%).

[0169] Instrument color matching: A spectrophotometer was used to scan the colorful fancy yarn sample G to obtain the CIE Lab value and calculate the color difference ΔE, which was ΔE=0.9.

[0170] The judgment result obtained by manual color matching (color difference acceptance rate = 100%) and the result obtained by instrument color matching (color difference value ΔE = 0.9) are stored.

[0171] Example 3.

[0172] The difference between this embodiment and the first and second embodiments is that the target pattern of the color-spun fancy yarn sample is a striped pattern.

[0173] According to an embodiment of the present invention, a method for preparing a small sample of color-spun fancy yarn with controllable micro-fiber structure with high efficiency, low consumption and high precision is provided, comprising:

[0174] Step S1, layered processing of trace raw materials: weighing raw materials of group A and group B according to the target pattern of the color-spun fancy yarn sample.

[0175] In this embodiment, the target fancy pattern of the color-spun fancy yarn sample is a striped pattern, and the raw materials of group A are mixed color cellulose fibers (100% cellulose fibers): 0.4 g of pink regenerated cellulose fibers and 0.1 g of blue regenerated cellulose fibers.

[0176] The raw materials of group B are mixed color cellulose fibers (100% cellulose fibers): 0.4 g of lake green regenerated cellulose fibers and 0.1 g of sky blue regenerated cellulose fibers.

[0177] Step S2, controlling the fiber orientation of the raw materials of group A and group B: laying the raw materials of group A in layers to form a first cotton layer, and laying the raw materials of group B in layers to form a second cotton layer.

[0178] like Figure 6 As shown, in this embodiment, the raw materials of group A are laid in layers to form a first cotton layer AM, and the raw materials of group B are laid in layers to form a second cotton layer BM.

[0179] Next, hold one end of the raw material in Group A with your left hand, stretch it with your right hand, and then lay it flat on the workbench, layering it into a first cotton layer AM of 20 cm × 5 cm. Hold one end of the raw material in Group B with your left hand, stretch it with your right hand, and then lay it flat on the workbench, layering it into a second cotton layer BM of 20 cm × 5 cm.

[0180] The first cotton layer AM and the second cotton layer BM are respectively subjected to directional drafting for 5 to 10 times, and the fiber orientation angles of the first cotton layer AM and the second cotton layer BM are controlled to be ≤15°, and the first cotton sliver AL and the second cotton sliver BL are output.

[0181] In step S2, the present invention uses the sliver sample machine 100 to control the fiber orientation of the raw materials of group A and group B.

[0182] In this embodiment, the target pattern of the color-spun fancy yarn sample is a striped pattern. Group A raw materials use mixed color cellulose fibers, and group B raw materials use mixed color cellulose fibers. By adjusting the distance between the input end and the output end, the distance between the input roller 101 and the output roller 103 is made 42 mm.

[0183] like Figure 6 As shown, in this embodiment, the first cotton layer AM and the second cotton layer BM are respectively subjected to directional stretching 5 to 10 times, the fiber orientation angle of the first cotton layer AM and the second cotton layer BM is controlled to be 15°, and the first cotton sliver AL and the second cotton sliver BL are output.

[0184] Specifically, the first cotton layer AM is input into the input roller 101 of the sliver prototype machine 100 (the gap between the input roller 101 and the input leather roller 102), output through the output roller 103 of the sliver prototype machine 100 (the gap between the output roller 103 and the output leather roller 104), and is directionally drafted and mixed at the collecting pile roller 106. The drafted first cotton layer AM is removed from the collecting pile roller 106, and this process is repeated 5 to 10 times until the fiber orientation angle of the group A raw materials of the first cotton layer AM is fully mixed to 15 degrees, and the first sliver AL is output.

[0185] The second cotton layer BM is input into the input roller 101 of the sliver sample machine 100, output through the output roller 103 of the sliver sample machine 100, and subjected to orientation drafting and mixing at the collecting pile roller 106. The drafted second cotton layer BM is removed from the collecting pile roller 106. This process is repeated 5 to 10 times until the fiber orientation angle of the group B raw materials in the second cotton layer BM is fully mixed to 15°, and the second cotton sliver BL is output.

[0186] During the directional stretching of the first cotton layer AM and the second cotton layer BM by the above-mentioned sliver prototype machine 100, the linear speed ratio of the input roller 101 and the output roller 103 is 1:5.

[0187] Step S3, pattern directional construction: according to the target pattern of the color-spun fancy yarn sample, the first cotton sliver AL and the second cotton sliver BL are spun into roving of the color-spun fancy yarn sample corresponding to the target pattern.

[0188] like Figure 6 As shown, in this embodiment, the target pattern of the color-spun fancy yarn sample is a stripe pattern, and the roving of the color-spun fancy yarn sample corresponding to the stripe pattern is spun according to the following method:

[0189] After the first sliver AL and the second sliver BL are parallel-drawn side by side, a third sliver H is obtained.

[0190] The third cotton sliver H is twisted and spun into a fifth roving I of a color-spun fancy yarn sample corresponding to the stripe pattern.

[0191] The present invention uses a sliver sample machine 100 and a handheld pneumatic twister 200 to spin roving of a color-spun fancy yarn sample corresponding to a target fancy style.

[0192] Combine Figure 2 、 Figure 3 and Figure 6 In this embodiment, a sliver sample machine 100 and a handheld air pressure twister 200 are used to spin roving of a color-spun fancy yarn sample corresponding to a striped pattern.

[0193] The collecting lint roller 106 of the sliver sample machine 100 is removed, and the handheld pneumatic twister 200 is placed on the output roller 104 of the sliver sample machine 100, with the twisting mouth 204 of the handheld pneumatic twister 200 facing the output roller 104 of the sliver sample machine 100.

[0194] The micro air pump 201 is adjusted so that the twisting air pressure applied by the micro air pump 201 to the silicone twist groove 203 is 0.5 MPa, and the twist of the silicone twist groove 203 is locked to 4 twists / cm through the parameter encoder 205.

[0195] After the first sliver AL and the second sliver BL are stretched side by side and in parallel through the input roller 101 and the output roller 103 of the sliver prototype machine 100, the third sliver H is output.

[0196] The third cotton sliver H is fed into the silicone twisting groove 203 by the twisting nozzle 204 of the handheld pneumatic twister 200. The silicone twisting groove 203 twists the third cotton sliver H and spins it into a fifth roving I of a color-spun fancy yarn sample corresponding to the stripe pattern.

[0197] The spun fifth roving I has a length of 30 to 60 cm, is uniform in thickness and has a certain twist.

[0198] Step S4, spinning a color-spun fancy yarn sample: drafting the roving of the color-spun fancy yarn sample corresponding to the target pattern, and spinning the roving into the color-spun fancy yarn sample corresponding to the target pattern.

[0199] like Figure 6 As shown, in this embodiment, the target pattern of the color-spun fancy yarn sample is a striped pattern, and the fifth roving I is drafted and spun into a color-spun fancy yarn sample J (spun yarn) corresponding to the striped pattern.

[0200] Specifically, a small spinning sample machine is used to draft the fifth roving I at a speed ratio of 1:4 to 1:6 to spin it into a color-spun fancy yarn sample J (spinning yarn) corresponding to the striped pattern.

[0201] The spinning count of the color-spun fancy yarn sample corresponding to the target pattern spun by the present invention is 10 to 60S (spinning count). In this embodiment, the spinning count of the color-spun fancy yarn sample J (spinning yarn) corresponding to the striped pattern spun is 40S (spinning count), and the length of the color-spun fancy yarn sample J (spinning yarn) corresponding to the striped pattern is 10 to 50M.

[0202] The spun yarn sample machine of the present invention is not specifically limited. Those skilled in the art can use the existing spun yarn sample machine to spin roving into a color-spun fancy yarn sample J (spun yarn) with corresponding striped patterns.

[0203] like Figure 7 As shown, in this embodiment, the spun striped fancy yarn sample J is passed through a yarn threading hole 301 of the yarn sample card 300 and wound onto the yarn sample card 300.

[0204] Color matching and proofing of the fancy yarn sample J with striped pattern:

[0205] Manual color matching: Under D65 light source, three technicians compared the striped fancy yarn sample J with the color card provided by the customer, and all three technicians judged it to be qualified (color difference acceptance rate = 100%).

[0206] Instrument color matching: A spectrophotometer is used to scan a striped fancy yarn sample J, obtain CIE Lab values, and calculate the color difference value ΔE, and the obtained color difference value ΔE=1.

[0207] The judgment result obtained by manual color matching (color difference acceptance rate = 100%) and the result obtained by instrument color matching (color difference value ΔE = 1) are stored.

[0208] The color matching and proofing results of the color-spun fancy yarn sample prepared by the traditional process and the color-spun fancy yarn sample prepared by the present invention are compared, as shown in Table 1.

[0209] Table 1 Comparison of color matching and proofing results of the color-spun fancy yarn sample prepared by the traditional process and the color-spun fancy yarn sample prepared by the present invention

[0210] index Traditional crafts The present invention Improvement Raw material dosage 500g 0.5～1g 99.8％↓ Proofing cycle 72h 2h 97.2％↓ Twist uniformity CV ≥ 15% CV≤5% 3 times ↑ Color difference qualified rate 60％～70％ ≥95％ 35％↑

[0211] As can be seen from Table 1, the colored spun fancy yarn sample prepared by the present invention can effectively save raw material consumption, quickly make samples, improve sample making efficiency, reduce production costs, and improve twist uniformity and color difference qualified rate.

[0212] There are a few points to note:

[0213] (1) The drawings of the embodiments of the present invention only relate to the structures related to the embodiments of the present invention. Other structures may refer to conventional designs.

[0214] (2) For the sake of clarity, the thickness of layers or regions in the drawings used to describe the embodiments of the present invention are exaggerated or reduced, that is, these drawings are not drawn to scale. It is understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "under" another element, the element may be "directly" "on" or "under" the other element or intervening elements may be present.

[0215] (3) In the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other to form new embodiments.

[0216] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. The protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A method for preparing a small sample of color-spun fancy yarn with controllable micro-fiber structure with high efficiency, low consumption and high precision, characterized in that: The preparation method comprises: S1. Layered processing of trace raw materials: weigh group A and group B raw materials according to the target pattern of the colored spun fancy yarn sample; Wherein, the target pattern of the colored spun fancy yarn sample is a checkered pattern, a colorful pattern or a striped pattern; Among them, the raw materials of group A are combed colored cotton, or a blend of combed colored cotton and chemical fiber, or mixed color cellulose fiber; The raw materials for Group B are combed white cotton, or a blend of combed white cotton and chemical fiber, or mixed color cellulose fiber; S2. Control the fiber orientation of the raw materials of group A and group B: lay the raw materials of group A in layers to form a first cotton layer, and lay the raw materials of group B in layers to form a second cotton layer; Directing and drafting the first cotton layer and the second cotton layer 5 to 10 times respectively, controlling the fiber orientation angles of the first cotton layer and the second cotton layer to be ≤15°, and outputting a first cotton sliver and a second cotton sliver; S3, pattern directional construction: spinning the first cotton sliver and the second cotton sliver into roving of the color-spun fancy yarn sample corresponding to the target pattern according to the target pattern of the color-spun fancy yarn sample; S4. Spinning a color-spun fancy yarn sample: drafting the roving of the color-spun fancy yarn sample corresponding to the target pattern to spin the color-spun fancy yarn sample corresponding to the target pattern.

2. The preparation method according to claim 1, characterized in that In step S1, the types of raw materials in group A and group B are determined according to the target pattern of the colored spun fancy yarn sample: When the target pattern of the color-spun fancy yarn sample is a checkered pattern, the raw materials of group A are combed colored cotton and the raw materials of group B are combed white cotton; When the target fancy pattern of the color-spun fancy yarn sample is a colorful fancy pattern, the raw materials of group A are a blend of combed colored cotton and chemical fiber, and the raw materials of group B are a blend of combed white cotton and chemical fiber; When the target fancy pattern of the color-spun fancy yarn sample is a striped pattern, the raw materials of group A are mixed color cellulose fibers, and the raw materials of group B are mixed color cellulose fibers.

3. The preparation method according to claim 1, characterized in that In step S2, a sliver sample machine is used to control the fiber orientation of the raw materials of group A and group B; The sliver prototype machine includes at least an input roller and an output roller, and the distance between the input roller and the output roller is determined according to the types of the raw materials of group A and group B: When group A uses combed colored cotton as raw material and group B uses combed white cotton as raw material, the distance between the input roller and the output roller is 32-35mm; When the raw materials of group A are a mixture of combed colored cotton and chemical fiber, and the raw materials of group B are a mixture of combed white cotton and chemical fiber, the distance between the input roller and the output roller is: 33-42mm; When the raw materials of group A are mixed color cellulose fibers and the raw materials of group B are mixed color cellulose fibers, the distance between the input roller and the output roller is 40 to 45 mm.

4. The preparation method according to claim 1, characterized in that In step S3, when the target pattern of the color-spun fancy yarn sample is a checkered pattern, the roving of the color-spun fancy yarn sample corresponding to the checkered pattern is spun according to the following method: The first cotton sliver is drafted and twisted to be spun into a first roving corresponding to the color-spun fancy yarn sample of the checkered pattern; The second sliver is drafted and twisted to be spun into a second roving corresponding to the color-spun fancy yarn sample of the checkered pattern; In step S4, when the target pattern of the color-spun fancy yarn sample is a checkered pattern, the first roving and the second roving are composite-drafted to be spun into a color-spun fancy yarn sample corresponding to the checkered pattern.

5. The preparation method according to claim 1, characterized in that In step S3, when the target pattern of the color-spun fancy yarn sample is the colorful pattern, the roving of the color-spun fancy yarn sample corresponding to the colorful pattern is spun according to the following method: The second sliver is drafted and twisted to be spun into a third roving corresponding to the color-spun fancy yarn sample of the overflowing color pattern; The first sliver and the third roving are drafted and twisted together to spin into a fourth roving corresponding to the color-spun fancy yarn sample of the overflowing color pattern; In step S4, when the target pattern of the color-spun fancy yarn sample is an overflowing color pattern, the four rovings are drafted and spun into a color-spun fancy yarn sample corresponding to the overflowing color pattern.

6. The preparation method according to claim 1, characterized in that In step S3, when the target pattern of the color-spun fancy yarn sample is a stripe pattern, the roving of the color-spun fancy yarn sample corresponding to the stripe pattern is spun according to the following method: After parallel drafting the first cotton sliver and the second cotton sliver side by side, a third cotton sliver is obtained; Twisting the third cotton sliver to form a fifth roving of the color-spun fancy yarn sample corresponding to the stripe pattern; In step S4, when the target pattern of the color-spun fancy yarn sample is a stripe pattern, the five rovings are drafted and spun into a color-spun fancy yarn sample of the corresponding stripe pattern.

7. A sliver prototype machine for the preparation method according to any one of claims 1 to 6, characterized in that: The sliver prototype machine comprises: An input roller and an input top roller, wherein the input roller and the input top roller form an input end; An output roller and an output roller, wherein the output roller and the output roller form an output end; The distance between the input end and the output end is adjustable; A collecting velvet roller, which is detachably arranged at an output end formed by the output roller and the output roller; A spacing ruler is used to measure the distance between the input end and the output end.

8. The sliver prototype machine according to claim 7, characterized in that: The sliver prototype further comprises: a first pressure spring and a second pressure spring; The first pressure spring is used to apply input roller pressure to the input roller; The second pressure spring is used to apply output roller pressure to the output roller.

9. A handheld pneumatic twister used in the preparation method according to any one of claims 1 to 6, characterized in that: The handheld air pressure twister includes a micro air pump, a silicone twisting groove and a twisting nozzle; The twisting nozzle is connected to the silicone twisting groove; The micro air pump is connected to the silicone twist groove and is used to apply twisting air pressure to the silicone twist groove to drive the silicone twist groove to rotate.

10. The handheld pneumatic twister according to claim 9, characterized in that: The handheld pneumatic twister further includes a twist controller; The twist controller is used to control the twist of the silicone twist groove.

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