Preparation process of a tencel and linen blended fabric and sizing machine for its preparation

Abstract

The present invention discloses a preparation process for a tencel linen blended fabric, which comprises the following technological steps carried out in sequence: selecting tencel fibers and linen fibers; blending the tencel fibers and linen fibers into a tencel linen blended yarn by using the siro compact spinning method; making the tencel linen blended fabric after the tencel linen blended yarn goes through the processes of warping, sizing, drawing-in, weaving and finishing in sequence; and using a sizing machine without sizing skin on the yarn in the sizing process. The present invention also discloses a sizing machine for preparing the tencel linen blended fabric, which comprises a creel, a sizing box, a drying chamber and a headstock arranged in sequence along the yarn feeding direction; all the sizing rollers in the sizing box are made of the same material; a cold and heat exchange circulation pipeline is arranged in the last two sizing rollers along the yarn feeding direction in the sizing box, and a medium channel communicated with the cold and heat exchange circulation pipeline is further arranged on the sizing machine. The present invention can effectively avoid sizing skin on the surface of the yarn, can realize uniform distribution of the yarn tension between drying cylinders, and improves the quality of the yarn.

Description

Technical Field

[0001] The present invention relates to a preparation process of a tencel and linen blended fabric and a sizing machine used for the preparation. Background Art

[0002] Flax is the earliest natural plant fiber used by humans, with a history of more than 10,000 years. Flax is a pure natural fiber. Due to its remarkable characteristics such as sweat absorption, good air permeability and harmlessness to the human body, clothes woven from flax are deeply loved by people and occupy a certain share in the current fabric market. However, the yarn count of pure flax fabric is low, the yarn stiffness is large, the yarn uniformity is poor, and its texture is relatively burr, and it does not have a soft and fluffy feel. In addition, because the spinning process fiber is coarser and harder than the fiber of other raw materials, the spun yarn is woven into a cloth that is very rough and hard, not soft and elastic. In recent years, international high-end clothing brands have been developing and researching interwoven fabrics such as flax and polyester, spandex, etc., which have improved the feel of the fabric to a certain extent. However, the biggest disadvantage of these fabrics is that they do not have the natural style of linen fabrics. At the same time, the weaving difficulty is very large, and the fabric surface will have weaving defects such as broken weft, skipping, slippage, and sparse and dense spots, which are extremely difficult to repair. These fabrics have large differences in the warp and weft yarn counts, highlighting the linen yarn defects and reducing the quality of the fabric. Therefore, exploring the blending of flax and high-quality elastic fibers is the best way to retain the natural characteristics of linen fabrics and improve the feel and function of fabrics. Tencel is a cellulose fiber with very high rigidity, good dimensional stability after washing (shrinkage rate is only 2%) and high hygroscopicity. Its fiber cross-section is round or oval, with beautiful luster, soft feel, good drape and good flowability. It is widely used in various textiles. Blending the two and weaving them into fabrics will have better wearability. In the preparation process of blended fabrics, sizing is an important step. Sizing in English: warp sizing is a process of applying sizing to warp yarns to improve their weavability. Weavability refers to the ability of warp yarns to withstand repeated friction, stretching, bending, etc. of warp stop pieces, healds, reeds, etc. on the loom without a lot of fluff or even breakage. Unsized single yarn fibers are not firmly attached to each other, and there are more hairs on the surface, which is difficult to weave. After sizing, part of the sizing liquid penetrates between the fibers, and the other part adheres to the surface of the warp yarn. Sizing that mainly involves the penetration of slurry between fibers is called penetrating sizing, and sizing that mainly involves the adhesion of slurry to the surface of the warp yarn is called covering sizing. At present, in order to prevent slurry from sticking to the yarn and causing the yarn to become skinned (in the prior art, due to the long shaft drop operation time and the failure to start the snail speed, the slurry remaining in the squeezing area of ​​the sizing roller and the sizing roller dries up and becomes skinned after drying, making it difficult to separate the warp yarn or leaving obvious marks, forming transverse strips of slurry spots. In addition, the slurry has poor fluidity at the edges and corners of the slurry tank, especially at the two ends of the sizing roller. The slurry or foam pressed by the squeezing roller is easy to gather and become skinned after condensation. It is brought to the warp yarn by the sizing roller and forms slurry spots after squeezing, that is, dispersed slurry spots), the last two slurry rollers in the slurry tank along the yarn feeding direction are made of different materials, such as rubber rollers and steel rollers, to avoid slurry skin (since the steel roller has good heat dissipation and the rubber roller has good heat preservation, the temperature difference between the two rollers is large, so the slurry is not easy to stick to the yarn, and therefore the yarn is not easy to become skinned).However, the effect of this method is still not good enough. Sometimes, the phenomenon of yarn sticking and pilling still occurs during take-off and landing, which affects the quality of the yarn and results in poor quality of the finally woven fabric. Patent with publication number CN108532075A: A wet dividing rod structure in a wet dividing and layering device of a sizing machine, including a rod body, a left support cover, a right support cover, a spring, a water inlet pipe, a water outlet pipe, a steam driver, and a steam pipe. The left support cover and the right support cover are respectively arranged at the left and right ends of the rod body. The water inlet pipe and the water outlet pipe are respectively connected to the rod body through the left support cover and the right support cover. The spring is arranged at the connection position between the water inlet pipe and the left support cover. The steam driver is arranged on the outer side edge of the right support cover. The steam pipe is arranged on the steam driver and bends and extends above the rod body. By wetting the surface of the wet dividing rod, it not only avoids the phenomenon of the yarn being over-wet and sticking, but also realizes the wetting of the surface of the wet dividing rod, facilitating the dividing of the wet yarn and enabling the yarn to pass through the wet dividing rod in layers without sticking slurry or forming slurry skin. Patent with publication number CN104746341A:. A method for making a cuprammonium / viscose / flax-cotton fiber blended fabric, characterized in that the selected warp and weft materials are in parts by mass: 30-50 parts of cuprammonium fiber, 15-25 parts of flax fiber, 40-90 parts of viscose fiber, 20-40 parts of combed cotton, and 8-18 parts of superfine denier polyester. The preparation process of the fiber fabric is carding, combing, drawing, roving, spinning, and weaving operations. Among them: the weaving process also includes warping, water washing, vacuum setting, scouring, dyeing, sizing, and jetting operations; the specific steps of sizing are: preparing the sizing solution, adding water to the sizing tank and heating it to 50°C, adding a pre-dyeing agent, the added mass of the pre-dyeing agent being 15-18% of the water, starting the stirrer, and then adding solid PVA in a mass ratio of solid PVA: water of 1-4:80, heating to 90°C, and stirring and dissolving to make the sizing solution; sizing, using a sizing machine to go on the machine, and the sizing solution in the sizing tank does not need to be heated; the pre-dyeing agent includes by weight parts: 0.5-1.5 parts of sodium hydroxide, 0.2-0.5 parts of chelating agent, 0.2-1 part of sodium hexametaphosphate, and the total mass of the sodium hydroxide, chelating agent, and sodium hexametaphosphate and the mass of water is in a ratio of 2:50; and after the sizing process, keep warm for 50-80 min according to the dye concentration to be dyed of the fabric; it does not form slurry skin by sizing with PVA with a concentration not higher than 4%, that is, by improving the materials. Patent with publication number CN108505264A: An immersion sizing tank with high stability, including a sizing tank made of stainless steel. A plurality of spray heads are respectively arranged on the inner walls around the sizing tank. The lowest points of all the spray heads are higher than the liquid level of the sizing solution. A sandwich layer is respectively arranged inside each wall surface of the sizing tank. A plurality of stainless steel water pipes are arranged in the sandwich layer. One end of each stainless steel water pipe is connected to the main water pipe joint, and the other end is connected to a spray head. The main water pipe joint is connected to an external hot water pool. Then, by continuously spraying hot water on the liquid surface of the sizing tank, the problem of yarn forming slurry skin in winter is avoided.These methods for solving the problem of sizing skin are not targeted. In the prior art, due to the excessive time of the shaft dropping operation and the lack of the snail speed, the sizing liquid remaining in the extrusion area between the sizing roller and the upper sizing roller dries up and becomes sizing skin after drying, making it difficult to separate the warp yarns or leaving obvious marks, forming horizontal strip sizing spots. In addition, the sizing liquid at the corners of the sizing tank has poor fluidity. Especially at both ends of the upper sizing roller, the sizing liquid or foam pressed by the sizing roller is prone to accumulate and coagulate into sizing skin, which is carried onto the warp yarns by the upper sizing roller and forms sizing spots after pressing, that is, dispersed sizing spots. There are no effective measures in the current prior art to specifically solve these problems of sizing skin. In addition, when drying in the drying room during sizing, the yarn tension cannot be evenly distributed between the drying cylinders, which is also one of the reasons for the poor quality of the yarns after sizing. Summary of the Invention

[0003] The purpose of the present invention is to overcome the defects existing in the prior art and provide a preparation process for a tencel linen blended fabric, which can effectively avoid the formation of sizing skin on the surface of the yarns, can specifically solve the current problem of sizing skin, especially solve the problem of dispersed sizing spots; the present invention can achieve uniform distribution of the yarn tension between the drying cylinders and improve the quality of the yarns.

[0004] To achieve the above purpose, the technical solution of the present invention is to design a preparation process for a tencel linen blended fabric, including the following technological steps carried out in sequence:

[0005] S1: Select tencel fibers and linen fibers;

[0006] S2: Blended-spin the tencel fibers and linen fibers into tencel linen blended yarns by using the siro compact spinning method;

[0007] S3: Make the tencel linen blended fabric after passing the tencel linen blended yarns through the processes of warping, sizing, drawing-in, weaving, and finishing in sequence;

[0008] In the sizing process, a sizing machine that does not form sizing skin on the yarns is used. By using a special sizing machine that does not form sizing skin, it can effectively avoid the formation of sizing skin on the surface of the yarns, can specifically solve the current problem of sizing skin, especially solve the problem of dispersed sizing spots.

[0009] A further technical solution is that the tencel fibers are A100 type tencel fibers; the roving twist factor of the spinning is 80, and the yarn twist factor is 360; the tencel linen blended yarn is 30S. The specification of the tencel fibers is (0.95D - 1.24)D * 38mm.

[0010] A further technical solution is that the linen fibers are made from the stem fibers of the flax phloem. The obtained bundle fibers after semi-degumming are made by rolling and scutching. The rolling process is: rolling the bundle fibers into neat flax segments; the scutching process is: processing the flax segments into technical fibers composed of 10 - 20 single fibers.

[0011] A further technical solution is that the mass ratio of tencel fiber to linen fiber is 2:8 to 8:2.

[0012] Another technical solution provided by the present invention is that the sizing machine involved in the preparation process of the tencel-linen blended fabric includes a creel, a sizing vat, a drying chamber, and a headstock arranged in sequence along the yarn feeding direction;

[0013] The sizing rollers in the sizing vat are all made of the same material; a cold and heat exchange circulation pipeline is arranged in the last two sizing rollers along the yarn feeding direction in the sizing vat, and a medium channel communicating with the cold and heat exchange circulation pipeline is further included on the sizing machine; a cold and heat medium delivery pipe is connected to the medium channel. Using rollers of the same material instead of different materials is convenient for procurement and installation. In addition, a cold and heat exchange circulation pipeline is arranged in the rollers of the same material, so that the temperature difference between the two rollers is large, so the sizing material is not easily adhered to the yarn, and thus sizing skins are not easily formed on the yarn. The sizing rollers in the sizing vat are all made of the same material, such as all made of rubber rollers or steel rollers.

[0014] A further technical solution is that a medium channel communicating with a cold and heat exchange circulation pipeline is arranged on the roller shaft of the sizing roller. The medium channel is arranged on the axial end face of the roller shaft, and a transmission structure is arranged on the side circumferential surface of the roller shaft and connected with a driving mechanism for driving the sizing roller to rotate; a cold and heat medium conveying pipe is rotatably connected to the medium channel; one of the media in the cold and heat exchange circulation pipelines arranged in the last two sizing rollers along the yarn feeding direction in the sizing vat is a cold medium and the other is a hot medium. A rotary seal is arranged at the connection of the medium channel and the medium conveying pipe. Another technical solution is that among the last two sizing rollers along the yarn feeding direction in the sizing vat, the upper sizing roller is a squeezing roller and the lower sizing roller is a sizing roller. The upper half of the sizing roller is located above the liquid level of the sizing liquid in the sizing vat, and the lower half of the sizing roller is located below the liquid level of the sizing liquid in the sizing vat. The sizing roller includes a middle fixed roller and two upper and lower semi-circular covering bodies (the covering bodies are fixedly connected to the middle fixed roller) covered on the circumferential surface of the middle fixed roller. A hot circulation pipeline is arranged in the upper semi-circular covering body, and a cold circulation pipeline is arranged in the lower semi-circular covering body. A cold and heat medium conveying pipe is connected to the medium channel. The medium channel is arranged on the side end face of the covering body (and the medium channel is communicated with the hot circulation pipeline or the cold circulation pipeline). Ball bearings are rotatably arranged on the circumferential outer side wall of the covering body. An outer roller body (the outer roller body is annular) is rotatably sleeved outside the covering body. The length of the outer roller body is slightly longer than the length of the middle fixed roller, and a gear ring concentric with the outer roller body is fixedly arranged on the side end face of the outer roller body exceeding the middle fixed roller. A driving gear is meshed with the gear ring, and the driving gear is fixedly connected to the output shaft of a reduction motor. The outer roller body is driven to rotate by driving the reduction motor. In this way, not only the sizing of the sizing roller during rotation can be realized, but also it can be ensured that the upper half of the outer roller body of the sizing roller in rotation is always in a heated state (for eliminating foam), while the lower half of the outer roller body, that is, the part located below the liquid level of the sizing liquid, is always cold (because the cold medium is circulated inside). In addition, in order to prevent sizing liquid from entering between the outer roller body and the middle fixed roller, a rotary seal can be arranged between the outer roller body and the middle fixed roller.

[0015] A further technical solution is that among the last two sizing rollers along the yarn feeding direction in the sizing vat, the upper sizing roller is a squeezing roller and the lower sizing roller is a sizing roller. The cold and heat exchange circulation pipeline in the squeezing roller is a hot circulation pipeline, and a hot medium is arranged in the hot circulation pipeline. Since the squeezing roller is arranged above and the sizing roller is arranged below, in order not to affect the temperature of the sizing liquid, the hot circulation pipeline is arranged in the squeezing roller. Generally, hot water is used as the hot medium; by arranging a hot circulation pipeline in the squeezing roller, it can effectively prevent the sizing liquid remaining in the extrusion area between the squeezing roller and the sizing roller from drying up (when the shaft replacement operation takes too long, the sizing liquid remaining in the extrusion area between the squeezing roller and the sizing roller will dry up and become sizing skins after drying, making it difficult to separate the warp yarns or leaving obvious horizontal strip-shaped sizing spots), and it can also, to a certain extent, prevent foam from being formed when the squeezing roller presses down (due to the poor fluidity of the sizing liquid at the corners in the sizing vat, especially at both ends of the sizing roller, the sizing liquid or foam pressed down by the squeezing roller is likely to accumulate and condense into sizing skins, which are carried onto the warp yarns by the sizing roller and form sizing spots after squeezing).

[0016] A further technical solution is that the cold and heat exchange circulation pipeline on the lower sizing roller, i.e., the sizing roller, is located above the liquid level of the sizing slurry in the sizing vat. The cold and heat exchange circulation pipeline is a heat circulation pipeline and the heat medium circulates inside the heat circulation pipeline; a part of the sizing roller is located above the liquid level of the sizing slurry in the sizing vat, and the other part is located below the liquid level of the sizing slurry in the sizing vat.

[0017] A further technical solution is that the drying cylinders in the drying chamber of the sizing machine are rotatably arranged on the inner side wall of the drying chamber through a rotating shaft. A circular groove with a size larger than the diameter of the rotating shaft is arranged on the inner side wall of the drying chamber. The notch of the circular groove is provided with an inward flanging. The end of the rotating shaft located in the circular groove is provided with an outward flanging adapted to the aforementioned inward flanging; a retaining ring is arranged around the notch of the circular groove on the inner side wall of the drying chamber. A plurality of springs arranged in an annular array centered on the retaining ring are fixedly arranged on the inner side wall of the retaining ring. One end of the spring is fixedly connected to the inner side wall of the retaining ring, and the other end abuts against the circumferential outer side wall of the rotating shaft. The setting of the circular groove with a larger diameter gives the rotating shaft the freedom of different sliding directions. When the tension of some yarns is large, it will pull the drying cylinder to move. The setting of the spring makes the whole process more gentle and almost no vibration occurs (the spring is selected so that the drying cylinder does not displace under the normal tension of the yarn). Through the annular array setting of springs in multiple different directions, it can ensure that the yarn tension is evenly distributed among the drying cylinders (the prior art has adopted the method of controlling the rotation speed of each drying cylinder, but there are too many control sensing mechanisms).

[0018] A further technical solution is that a cam structure is connected to the roller shaft of the squeezing roller or the sizing roller through a transmission mechanism. On one side of the cam of the cam structure, an elastic lever located below the liquid level of the sizing slurry in the sizing vat is arranged. The moving range of the elastic lever is located below the liquid level of the sizing slurry in the sizing vat; there are two elastic levers and they are respectively located on both sides of the sizing roller. The transmission mechanism here can be a gear ring fixedly sleeved on the roller shaft, which meshes with a gear, and the wheel shaft of the gear is fixedly connected to the wheel shaft of the cam. By connecting the cam structure through the transmission mechanism arranged on the roller shaft of the squeezing roller or the sizing roller and stirring from time to time on both sides of the sizing roller, it can avoid the poor fluidity of the sizing slurry at the corners in the sizing vat, especially at both ends of the sizing roller. The sizing slurry or foam pressed down by the squeezing roller is easy to gather and condense into sizing skins, which are brought to the warp yarns by the sizing roller and form dispersed sizing spots after squeezing.

[0019] The advantages and beneficial effects of the present invention are as follows: It can effectively avoid the formation of sizing skins on the surface of the yarn, can achieve uniform distribution of the yarn tension among the drying cylinders, and improve the quality of the yarn.

[0020] Using rollers of the same material instead of rollers of different materials is convenient for procurement and installation. In addition, a cold and heat exchange circulation pipeline is arranged inside the rollers of the same material, making the temperature difference between the two rollers large. Therefore, the sizing material is not easy to adhere to the yarn, and thus it is not easy to form sizing skins on the yarn.

[0021] Since the squeezing roller is arranged at the top and the sizing roller is arranged at the bottom, in order not to affect the temperature of the slurry, the heat circulation pipeline is arranged inside the squeezing roller.

[0022] The setting of larger diameter circular grooves gives the rotating shaft the freedom to slide in different directions. When the tension of some yarns is large, it will pull the drying drum to move. The setting of the spring makes the whole process smoother and almost no vibration is generated.

[0023] By connecting the cam structure with the transmission mechanism arranged on the roller shaft of the squeezing roller or the sizing roller, stirring at both sides of the sizing roller from time to time can avoid the problem of poor fluidity of the slurry at the corners in the slurry tank, especially at both ends of the sizing roller. The slurry or foam pressed by the squeezing roller is easy to gather and condense to form slurry skin, which is brought to the warp yarn by the sizing roller and forms dispersed slurry spots after being pressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of a sizing machine involved in a preparation process of a Tencel-linen blended fabric of the present invention;

[0025] Figure 2 yes Figure 1 An enlarged schematic diagram of the middle part;

[0026] Figure 3 yes Figure 2 Side view of the middle sizing roller and the sizing roller;

[0027] Figure 4 yes Figure 1 A partial enlarged schematic diagram of the intercooler heat exchange circulation pipeline;

[0028] Figure 5 yes Figure 1 A partial enlarged schematic diagram of the part near the drying cylinder on the left in the middle;

[0029] Figure 6 yes Figure 5 Schematic diagram of the drying cylinder after the spring is removed;

[0030] Figure 7 yes Figure 1 An enlarged schematic diagram of the middle sizing roller;

[0031] Figure 8 yes Figure 7 A partial enlarged schematic diagram of the middle fixed roller and the cladding body;

[0032] Figure 9 yes Figure 7 A schematic diagram showing the ring gear.

[0033] In the figure: 1. Shaft frame; 2. Sizing vat; 3. Drying chamber; 4. Headstock; 5. Cold and hot exchange circulation pipeline; 6. Medium channel; 7. Cold and hot medium delivery pipe; 8. Driving gear; 9. Reduction motor; 10. Squeezing roller; 11. Sizing roller; 12. Drying cylinder; 13. Circular groove; 14. Retaining ring; 15. Spring; 16. Cam; 17. Elastic lever; 18. Intermediate fixed roller; 19. Cladding; 20. Outer roller body; 21. Gear ring. Detailed implementation manners

[0034] The following combines the accompanying drawings and embodiments to further describe the detailed implementation manners of the present invention. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and cannot be used to limit the protection scope of the present invention.

[0035] As Figures 1 to 9 shown, the present invention is a preparation process for a tencel and linen blended fabric, including the following technological steps carried out in sequence:

[0036] S1: Select tencel fibers and linen fibers;

[0037] S2: Blend the tencel fibers and linen fibers into a tencel and linen blended yarn by using the siro compact spinning method;

[0038] S3: Pass the tencel and linen blended yarn through the processes of warping, sizing, drawing-in, weaving, and finishing in sequence to make a tencel and linen blended fabric;

[0039] In the sizing process, a sizing machine that does not form sizing skin on the yarn is used. The tencel fibers are of type A100 tencel fibers; the roving twist factor for spinning is 80, and the yarn twist factor is 360; the tencel and linen blended yarn is 30S. The linen fibers are made from the stem fibers of the linen phloem, and the obtained bundle fibers after semi-degumming are made by rolling and beating. The mass ratio of tencel fibers to linen fibers is 2:8 to 8:2.

[0040] The sizing machine involved in the preparation process of the tencel and linen blended fabric includes a creel 1, a sizing vat 2, a drying chamber 3 and a headstock 4 arranged in sequence along the yarn feeding direction; all the sizing rollers in the sizing vat 2 are made of the same material; a cold and heat exchange circulation pipeline 5 is arranged in the last two sizing rollers along the yarn feeding direction in the sizing vat 2, and the sizing machine also includes a medium channel 6 communicated with the cold and heat exchange circulation pipeline 5; a cold and heat medium conveying pipe 7 is connected to the medium channel 6. A medium channel 6 communicated with the cold and heat exchange circulation pipeline 5 is arranged on the roller shaft of the sizing roller, the medium channel 6 is arranged on the axial end face of the roller shaft, and a transmission structure is arranged on the side circumferential surface of the roller shaft and is connected with a driving mechanism for driving the sizing roller to rotate; a cold and heat medium conveying pipe 7 is rotatably connected to the medium channel 6; one of the media in the cold and heat exchange circulation pipeline 5 arranged in the last two sizing rollers along the yarn feeding direction in the sizing vat 2 is a cold medium and the other is a hot medium. The upper sizing roller among the last two sizing rollers along the yarn feeding direction in the sizing vat 2 is a pressure roller 10, and the lower sizing roller is a sizing roller 11. The cold and heat exchange circulation pipeline 5 in the pressure roller 10 is a heat circulation pipeline, and a hot medium is arranged in the heat circulation pipeline. The cold and heat exchange circulation pipeline 5 on the lower sizing roller, that is, the sizing roller 11, is located above the liquid level of the sizing vat 2, the cold and heat exchange circulation pipeline 5 is a heat circulation pipeline and the heat medium is circulated in the heat circulation pipeline (a more preferred solution is: the sizing roller includes a middle fixed roller and two upper and lower semi-circular coating bodies coated on the circumferential surface of the middle fixed roller (the coating bodies are fixedly connected with the middle fixed roller), a heat circulation pipeline is arranged in the upper semi-circular coating body, a cold circulation pipeline is arranged in the lower semi-circular coating body, a cold and heat medium conveying pipe is connected to the medium channel, the medium channel is arranged on the side end face of the coating body (and the medium channel is communicated with the heat circulation pipeline or the cold circulation pipeline), balls are rotatably arranged on the circumferential outer wall of the coating body, an outer roller body (the outer roller body is annular) is rotatably sleeved outside the coating body, the length of the outer roller body is slightly longer than the length of the middle fixed roller and a gear ring concentric with the outer roller body is fixedly arranged on the side end face of the outer roller body exceeding the middle fixed roller, a driving gear is meshed with the gear ring, and the driving gear is fixedly connected to the output shaft of a reduction motor, and the outer roller body is driven to rotate by the driving of the reduction motor. In this way, the sizing of the sizing roller is realized, and it can also be ensured that the upper half of the outer roller body of the sizing roller that rotates is always in a heated state (for eliminating foam), and the lower half of the outer roller body, that is, the part located below the liquid level of the sizing vat, is always cold (because the cold medium is circulated inside). In addition, in order to prevent the sizing vat from entering between the outer roller body and the middle fixed roller, a rotary seal can be arranged between the outer roller body and the middle fixed roller); a part of the sizing roller 11 is located above the liquid level of the sizing vat 2, and the other part is located below the liquid level of the sizing vat 2.In the sizing machine, the drying cylinder 12 in the drying chamber 3 is rotatably arranged on the inner side wall of the drying chamber 3 through a rotating shaft. A circular groove 13 with a size larger than the diameter of the rotating shaft is arranged on the inner side wall of the drying chamber 3. The notch of the circular groove 13 is provided with an inward flanging. The end of the rotating shaft located in the circular groove 13 is provided with an outward flanging adapted to the aforementioned inward flanging. A retaining ring 14 is arranged around the notch of the circular groove 13 on the inner side wall of the drying chamber 3. A plurality of springs 15 arranged in a circular array around the center of the retaining ring 14 are fixedly arranged on the inner side wall of the retaining ring 14. One end of the spring 15 is fixedly connected to the inner side wall of the retaining ring 14, and the other end abuts against the outer circumferential side wall of the rotating shaft. A cam 16 structure is connected to the roller shaft of the pressure sizing roller 10 or the sizing roller 11 through a transmission mechanism. An elastic dial rod 17 located below the liquid level of the sizing liquid in the sizing tank 2 is arranged on one side of the cam 16 of the cam 16 structure. The movement range of the elastic dial rod 17 is located below the liquid level of the sizing liquid in the sizing tank 2. Two elastic dial rods 17 are provided and are respectively located on both sides of the sizing roller 11. The transmission structure arranged on the side circumferential surface of the roller shaft is a gear fixedly sleeved on the roller shaft. The driving mechanism for driving the sizing roller to rotate includes a driving gear 8 meshing with the aforementioned gear, and the driving gear 8 is fixedly sleeved on the output shaft of the reduction motor 9.

[0041] The working principle is as follows:

[0042] During sizing, the sizing roller rotates. Cold medium or hot medium is introduced into the medium channel 6 on the roller shaft through the cold and hot medium conveying pipe. The cold medium or hot medium enters the cold and hot exchange circulation pipeline 5, so as to respectively heat and keep warm and cool and keep the last two sizing rollers (i.e., the pressure sizing roller and the sizing roller) along the yarn feeding direction in the sizing tank 2. After the reduction motor for driving the sizing roller to rotate is started, the gear ring meshing with the gear on the output shaft of the reduction motor drives the outer roller body to rotate, while the cladding in the outer roller body (and a heat circulation pipeline is arranged in the cladding) is stationary, so that the upper half of the sizing roller is always heated and kept warm, and the foam pressed by the pressure sizing roller can be effectively eliminated. In the drying chamber of the sizing machine, if the tension of the yarn is too large, it will overcome the elastic force of the spring abutted on the rotating shaft of the drying cylinder, causing a certain displacement of the drying cylinder, avoiding the uneven tension of the yarn between the drying cylinders.

[0043] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and retouches can be made, and these improvements and retouches should also be regarded as the protection scope of the present invention.

Claims

1. Sizing machine for preparing tencel and linen blended fabric, characterized in that, It includes a creel, a sizing box, a drying chamber and a headstock arranged in sequence along the yarn feeding direction; All the sizing rollers in the sizing box are made of the same material; a cold and heat exchange circulation pipeline is arranged in the last two sizing rollers along the yarn feeding direction in the sizing box, and a medium channel communicating with the cold and heat exchange circulation pipeline is further included on the sizing machine; a cold and heat medium conveying pipe is connected to the medium channel; A medium channel communicating with the cold and heat exchange circulation pipeline is arranged on the roller shaft of the sizing roller. The medium channel is arranged on the axial end face of the roller shaft, and a transmission structure is arranged on the side circumferential surface of the roller shaft and is connected to a driving mechanism for driving the sizing roller to rotate; a cold and heat medium conveying pipe is rotatably connected to the medium channel; Among the last two sizing rollers along the yarn feeding direction in the sizing box, the upper sizing roller is a squeezing roller and the lower sizing roller is a sizing roller. The cold and heat exchange circulation pipeline in the squeezing roller is a heat circulation pipeline, and a heat medium is arranged in the heat circulation pipeline; The upper half of the sizing roller is located above the sizing liquid level in the sizing box, and the lower half of the sizing roller is located below the sizing liquid level in the sizing box. The sizing roller includes an intermediate fixed roller and upper and lower semi-circular coating bodies coated on the circumferential surface of the intermediate fixed roller. A heat circulation pipeline is arranged in the upper semi-circular coating body, and a cold circulation pipeline is arranged in the lower semi-circular coating body. A cold and heat medium conveying pipe is connected to the medium channel, and the medium channel is arranged on the side end face of the coating body.

2. The sizing machine for preparing the tencel and linen blended fabric according to claim 1, characterized in that, The drying cylinders in the drying chamber of the sizing machine are rotatably arranged on the inner side wall of the drying chamber through rotating shafts. A circular groove with a size larger than the diameter of the rotating shaft is arranged on the inner side wall of the drying chamber. An inward flanging is arranged at the notch of the circular groove, and an outward flanging adapted to the aforementioned inward flanging is arranged at the end of the rotating shaft located in the circular groove; a retaining ring is arranged around the notch of the circular groove on the inner side wall of the drying chamber, and a plurality of springs arranged in an annular array around the center of the retaining ring are fixedly arranged on the inner side wall of the retaining ring. One end of the spring is fixedly connected to the inner side wall of the retaining ring, and the other end abuts against the outer circumferential side wall of the rotating shaft.

3. The sizing machine for preparing the tencel linen blended fabric according to claim 2, characterized in that, A cam structure is connected to the roller shaft of the squeezing roller or the sizing roller through a transmission mechanism. An elastic shifting rod located below the sizing liquid level in the sizing box is arranged on one side of the cam of the cam structure. The moving range of the elastic shifting rod is located below the sizing liquid level in the sizing box; there are two elastic shifting rods and they are respectively arranged on both sides of the sizing roller.

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