JPH0684571B2 - Method of manufacturing package for covering by hot drawing and winding of twisted yarn - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for producing a covering package used for supplying a covering yarn in a covering step of winding a polyamide filament yarn around a elastic filament yarn in a covering manner. Is.

[Prior Art] As a yarn for producing a knitted fabric having a functional stretchability, a covering elastic yarn formed by covering a polyamide filament yarn with an elastic filament yarn and covering and winding the same has been generally used. Particularly, covering elastic yarns made of polyurethane elastic yarns and polyamide yarns have been widely used for stockings.

In the manufacturing process of the covering elastic yarn, the covering yarn is subjected to the covering process as a package wound on a collared bobbin. Conventionally, this covering package has been manufactured by simply rewinding a polyamide filament yarn into a bobbin with a collar by a simple device such as a bobbin reeling machine using a friction drive.

In this conventional method, as shown in FIGS. 5 (a) and 5 (b) (side view and front view, respectively), the yarn (Y) is pulled out from the raw yarn package (41), the guide (42), and the ring type are drawn. The tension is applied by the tensor (43), the bar guide (45), and the traverse by the traverse device (46), and then the bobbin (10) with a collar is wound. here,
The winding device portion includes a friction drive wheel (48) which is fixed to a drive shaft (47) to rotate, a friction roll (49) which is driven to rotate by contacting the drive wheel with its own weight, and an axial center of the friction roll ( 50) (mainly supported by a bearing (not shown)) and is mainly configured by a collared bobbin (10) that is inserted coaxially and rotates integrally with the friction roll. The yarn (Y) wound up on the collared bobbin (10) is tensioned by a tensor, and as the tensor, a ring type tensor (43) (self-weight of a plurality of worn rings (44)) is used. Tensor that applies tension and controls tension by changing the frictional contact angle depending on the balance between thread tension and thread tension), or two sets of comb-like friction resistance bodies made of ceramics, etc. A gate tensor or the like that sets a force and runs the yarn during this is used.

Further, since the productivity of the covering process mainly depends on the rotation speed of the covering bobbin, the covering speed has been increased to improve the productivity. Furthermore, in order to improve the performance of the obtained coated elastic yarn, ultrafine yarns having a denier of 15 denier or less have been used for covering.

[Problems to be Solved by the Invention] However, when the covering package manufactured by the conventional bobbin reeling machine is used, the yarn breakage during covering occurs due to the speeding up of the covering process and the fineness of the covering yarn. There was a big problem of increase. In particular, when the rotation speed became as high as 30,000 rpm or more and 40,000 rpm or so, it was difficult to cover even due to frequent occurrence of yarn breakage.

Furthermore, in the conventional method using the bobbin reeling machine, the rotation speed of the collar-equipped bobbin by the friction drive is only constant, so the actual speed at which the yarn is wound varies with the diameter of the wound layer, which changes with winding. Will change with. The degree of fluctuation of the bobbin diameter varies considerably depending on the yarn fineness, the winding tension, the package diameter and the package condition such as the package form such as the package form. The length was greatly varied, and there was usually a yarn length difference of about 5%. That is, in the conventional method using the bobbin reeling machine, it is difficult to control the length of the yarn wound on the collared bobbin to be constant.

If the yarn length difference between the packages is large, the difference in the yarn length difference at the end of processing in the covering process,
In the covering process which is operated by a system in which a large number of weights are started at the same time and ended at the same time, there are problems such as idle operation, generation of residual yarn waste yarn of the covering yarn, and waste treatment thereof. That is, when the packages are finished in a batch with a short yarn length, all the remaining yarns in the remaining packages become waste yarns, and the amount of waste yarns on the bobbin becomes large (about several percent on average). On the other hand, when the process is completed in accordance with a package with a long yarn length, the problem of the residual yarn amount is solved, but conversely, the elastic fiber of the core yarn is wound up as it is with the weight without the covering yarn and is wasted. Moreover, the idle operation reduces the operating efficiency of the machine.

These problems also occur between packages of the same weight, especially in the case of the double covering process using two covering yarn packages on the same weight.

In order to avoid these problems, there is also a rewinding system in which the covering yarn to be fed is stopped before the yarn becomes empty, and the yarn is spliced and restarted. However, the labor and time loss for splicing occur. In addition, not only in the covering step, but also in the knitting step of the obtained covering elastic yarn, another big problem occurs that thread breakage troubles frequently occur at the yarn seam, which is an effective solution. Not not.

Therefore, it is a main object of the present invention to provide a method for producing a covering package capable of suppressing yarn breakage in the covering process to a small amount even if the covering process is sped up or the covering yarn is made finer. .

Another object is to provide a method for manufacturing a covering package in which the length of the wound yarn can be easily controlled and which has a good constant length.

[Means for Solving the Problems] In order to achieve these objects, the present invention has a method in which a polyamide filament yarn having an elongation of 80% or less is hot-drawn, and subsequently, a ring-twisted yarn is wound on a bobbin with a brim for covering, A method for producing a covering package by hot drawing / twisting of a covering package having an average surface hardness of 93 degrees or more (Claim 1), and at the end of winding for a certain time from the start of hot drawing / twisting. Alternatively, the method for producing a covering package by hot drawing / twisting winding according to claim 1, wherein the hot drawing and the twisting winding are automatically stopped at the end of winding the drawn yarn of a certain length (claim 2).

In claim 1, in the manufacturing process of the covering package, hot drawing is performed, polyamide filament yarn having an elongation of 80% or less is used as the raw yarn, and
Hot drawing-The average surface hardness of the wound package is
It is important that the temperature is 93 degrees or higher.

Further, in the second aspect, means for controlling from the start to the stop of the winding by the winding time or the winding yarn length is further used.

The polyamide filament yarn used in the manufacturing process of the covering package must have a yarn elongation of 80% or less, and the elongation of 40% or more, further 50% or more in view of the heat drawing operability. It is preferable to have As long as the raw yarn has the above-mentioned elongation value, a polyamide yarn produced by a high-speed spinning method, a polyamide yarn produced by spinning and subsequently stretching, or a yarn after spinning and then stretching. Any polyamide yarn may be used, but among them, a polyamide yarn obtained by a high speed spinning method is preferable from the viewpoint of uniformity of the covering yarn obtained.

This yarn is hot drawn. The draw ratio may be about 1.10 times or more, more preferably 1.15 times or more. The heating temperature may be about 80 to 140 ° C. A ring-twisted yarn is wound after this hot drawing and the surface average hardness of the wound package is 93 degrees or more. Therefore, a covering package in which yarn breakage does not occur even during high-speed covering can be obtained. The package hardness level of 93 degrees or more can be obtained by optimizing the tension at the time of winding.
For example, conditions may be adopted such that the draw ratio is 1.3 times, the winding twist number is 14 t / m, and the average winding tension from the beginning to the end of the winding is about 0.15 g / d or more. The winding tension can be approximately represented by the tension at the downstream portion of the yarn feeding roll to the winding portion.

The surface average hardness of this package may be measured using an Asker rubber / plastic hardness meter C type (manufactured by Kobunshi Keiki Co., Ltd.).

FIG. 1 is a schematic view showing an example of a process of manufacturing a covering package by hot drawing and winding a twisted yarn by the method of the present invention.

The yarn (Ya) is drawn out from the raw yarn package (1) through the guides (2, 3) and the feed rolls (4,5) at a constant speed and drawn at a predetermined ratio by the drawing zone (6).
The surface speed of the draw roll (8) is the feed roll (5)
The drawing speed is equivalent to the drawing speed of the yarn and the yarn heating element (7) is in the drawing zone (6).
Is provided, the film is heat-stretched in this stretching zone (6). The heat-drawn yarn passes through a guide (11) and a traveler (13) that slides on a ring (12), and is wound up on a rotating bobbin (10) with a collar. At the time of winding, the ring (12) reciprocates between the upper and lower collars of this bobbin (10),
The bobbin is evenly wound.

In order to carry out hot drawing, an effective yarn contact length of 10 to
A means for providing a hot plate of about 30 cm is preferable, but an external yarn heating means (for example, hot draw pin) may be used.

In this device, bobbin insertion spindle (13)
Is supported on a pedestal via bearings (not shown), and is rotated by the driving drum portion by the running belt (14). A waist spool may be provided for winding the cord at the start (not shown).

In this hot drawing-twisting device, the original yarn package part, the drawing part, the ring part, and the traverse part can be diverted from the device structure used as a hot drawing and twisting device for polyamide yarn and the like. In these mechanisms, the guides of each part are dirty, worn, the rotatability of the rollers,
Appropriate control of the surface condition, the sliding property of the ring / traveller, the wear of the traveler, etc. may be carried out in the same manner as in the ordinary nylon yarn hot drawing process.

Further, in this device, the spindle part (including the bearing and the passive drum from the belt) in which the bobbin with the brim for covering is inserted and rotated at a high speed may have the same device structure as the bobbin insertion spindle part of the covering device. Good. By doing this, the bobbin to be inserted can sufficiently follow even at the same rotation speed level as the covering device, which is advantageous in terms of bobbin insertion stability, high-speed rotation stability of the spindle, and cost reduction of the mechanical device. is there.

Thus, the device for winding the covering bobbin, which is excellent in high-speed covering property and constant length property, can be easily prepared.

2 (a) and 2 (b) are schematic side views showing steps of producing a single covering elastic yarn, and are a side view and a front view, respectively. Here, the covering package is indicated by reference numeral (10).

3 (a) and 3 (b) show an outline of a process for producing a double covering elastic yarn, and are a side view and a front view, respectively. Here, the covering package is indicated by reference numerals (10 ') and (10 ").

FIGS. 4 (a) and 4 (b) are diagrams schematically showing the yarn form of the covering elastic yarn, showing a single covering elastic yarn and a double covering elastic yarn, respectively. Around the elastic filament yarn (Yu) forming the core yarn, the covering yarns (Ya), (Ya)
a ') and (Ya ") are only in one direction or are superposed 2
It winds in the direction and covers the surface of the elastic filament yarn (Yu).

2 and 3, the drive rolls (22, 23) rotate the elastic filament yarn package (21) to feed the elastic filament yarn (Yu), and the first delivery rolls (24, 25) It is pre-drafted to about 1.5 times. The elastic filament yarn is further subjected to a draft of about three times as much as the total draft by the second delivery rolls (32, 33) and enters the covering zone in that state (Yu ').

In the single covering process shown in FIG. 2, the single covering by the covering package (10) is repeated by the third covering.
In the double covering process shown in the figure, double covering is performed by two covering packages (10 ', 10 "). In this case, a spindle (30, 10) for inserting these packages (10, 10', 10") is used. 30 ', 30 ") is rotated by friction between the drive belts (28, 28', 28") and the friction drums (29, 29 ', 29 "), and the covering bobbins (10, 10', 10). ″) Spindle (30, 3)
0 ', 30 ") is for each fixed frame (26, 26', 2
6 ") and the bearings (27, 27 ', 27"). In the double covering process, the two drive belts (26 ', 26 ") run in opposite directions and
The rotation directions of the individual spindles (30 ′, 30 ″) are opposite to each other.

In FIG. 2, the elastic filament yarn (Yu ′) drafted about 3 times passes through the hollow covering spindle (30) and is supplied from the rotating covering package (10). It is wound and covered with polyamide yarn (Pa) to form a single covered yarn (Ys), which is taken up by the second delivery rolls (32, 33) and further traversed by the traverse guide (35) via the guide bar (34). It is wound into a single covered yarn package (38) which is rotated by a drive roll (36). The covered yarn package is rotatably supported by the bobbin chuck (37).

In Figure 3, the drafted elastic filament yarn (Yu) is a hollow covering spindle (30 ', 30 ").
Polyamide from the rotating undercover covering package (10 ') undercoated with polyamide yarn (Pa'), then through the rotating overcover covering package (10 ") Double-covered yarn (Yw) is covered with thread (Pa ")
It is wound into a double-covered yarn package (39) in the same manner as above.

The polyamide filament yarn used in the method of the present invention may be any filament yarn used as a covering yarn, such as nylon 6 filament yarn and nylon 66 filament yarn.

[Operation] The rotation speed of the covering bobbin in the covering process is successively increased to 25,000 rpm or more, and further to 30,000 to 40,000 rpm. However, by adopting the method of claim 1, yarn breakage during covering is prevented. It is possible to keep it low.

The increase in yarn breakage due to the faster covering process increases the occurrence of yarn loosening on the package due to the high speed rotation of the covering bobbin, and the loose yarn is caught in the air layer due to high speed rotation and turbulent flow. It is thought that this is because the separation of single yarns or the entanglement of single yarns occurs. The looseness of the yarn on the package is caused by the tension added by the centrifugal force of the yarn itself due to the rotation of the covering bobbin, and the tension is applied at a level proportional to the square of the rotation speed. For example, if the rotational speed is 1.5 times, 2.25 times of tension is applied, and if the rotational speed is 2 times, 4 times of tension is applied. As described above, it is considered that loosening of the yarn is more likely to occur as the covering process speeds up.

According to the method of the present invention, in the manufacturing process of the covering package, the polyamide filament yarn having an elongation of 80% or less is hot-drawn and then wound by the ring twisting method so as to have a high package hardness of 93 ° or more. It solves the problem of disconnection.

That is, in the manufacturing process of the covering package, when the polyamide yarn having an elongation of 80% or less is hot-stretched, stretching strain recovery occurs in the winding section, and a part of the shrinkage occurs in the winding process. However, the rest appears as a contraction phenomenon or a contraction stress generation phenomenon after being wound up on the bobbin, and the contraction or the tension on the bobbin more than the thread tension of the winding yarn is generated, and the thread tension level on the bobbin is extremely high. The bobbin has a high winding hardness and a significantly high level.

On the other hand, when the elongation of the raw yarn exceeds 80%, the delayed shrinkage phenomenon is small and the yarn shrinkage and the yarn stress generation on the bobbin are insufficient, so that a sufficient effect cannot be obtained. Also, when the draw ratio is too low, it is difficult to obtain a sufficient effect.

In addition, since the twisting yarn winding is added to improve the bundling property and the yarn is wound, the effect of preventing the occurrence of cracks, floating, and misalignment of the unwinding position of the single yarn in the yarn at the time of covering is added. Therefore, the action of preventing the occurrence of yarn breakage at the time of covering is doubled.

On the other hand, even in the conventional method, there is a method of applying a large tension to wind up in order to prevent yarn breakage in the covering process, but the tension ratio before and after the tension applying portion becomes large, and the yarn here The abrasion of the yarn becomes large, and on the contrary, the trouble of single yarn cracking of the yarn, single yarn sagging or single yarn breakage increases. From these points, there is a limit to the tension that can be applied, and in practice the package hardness could only be increased to about 90 degrees. Moreover, the abrasion of the yarn due to the application of a large tension causes a decrease in the yarn focusing property, so that it is difficult to wind up the yarn having a high focusing property. As described above, according to the conventional method, it is difficult to form a package having a sufficiently high hardness and a yarn package having a sufficiently high bundling property.

Further, in cold drawing, in general, as the draw ratio is increased, the shrinkage of the yarn between the draw roll and the winding section is increased, and the actual efficiency of drawing is greatly reduced. Even if the magnification is increased, reliable stretching is performed, and it is possible to significantly suppress the reduction in actual stretching efficiency. Therefore, it becomes possible to use a yarn having a sufficiently large fineness, which is advantageous for improving productivity and reducing costs. For example, according to the hot stretching method, even if the set magnification is 1.10, the effective magnification is close to 1.10 times, and if the set magnification is 1.15 times or more, the larger effect is obtained. In addition, the hot stretching can lower the stretching tension, which is advantageous for improving the operability during stretching.

Furthermore, according to the method of claim 2, a package having an excellent constant length can be obtained. That is, according to the method of claim 1, wherein the yarn that has been heat-drawn by the yarn supplying roll and the drawing roll at a constant rotation speed is used for winding the ring-twisted yarn at a constant speed. In addition, since the yarn is easily drawn by heat, the shrinkage of the yarn between the draw roll and the winding portion is small, the yarn length varying element in this portion is suppressed to be small, and the fixed length is further improved. In addition, according to the method of claim 2, as a system in which the winding time or the winding yarn length is constant, the repeated production causes the yarn length variation between the weights of the multiple weights and between the repeated products to be extremely large. The package can be made smaller and has excellent constant length. The constant time winding causes a slight speed change depending on the voltage fluctuation and the device load condition, but its constant length is within an allowable level. In terms of this constant length property, a constant yarn length control system is preferable in which the yarn fed at a constant speed is controlled by controlling the rotation number of the roller portion.

[Examples] -Example 1 An unstretched yarn spun at low speed was stretched 3.5 times to obtain an elongation of 55%.
Nylon 6 filament yarn (10.8 denier, 7 filaments) was obtained (No. 1). By adjusting the spinning speed and the like by the high-speed spinning method, nylon 6 filament yarn (10.8 denier, 7 filaments) having an elongation of 60% or 77% was obtained (No. 2 and 3, respectively).

These nylon 6 filament yarns were stretched at a draw ratio of 1.15 times, a draw roll speed of 1,000 m / min, a spindle rotation speed of 14,000 rpm, using the hot drawing-twisting device shown in FIG.
Average winding tension 0.14g / d, winding time 146 minutes 56 seconds (constant)
Under the conditions described above, drawing and winding of the twisted yarn were performed to obtain a covering package. As the yarn heating element, a hot plate having a contact length of 20 cm heated to 120 ° C. was used.

The obtained package has an inner diameter of 26 mm, an outer diameter of 58 mm, and a winding width of 80 m.
The volume was 160 m and the winding amount was 160 g.

The yarn layer surface hardness of this package was measured at n = 320, and the results (average value, range) are shown in Table 1.

Next, these packages are subjected to a double covering process, and 20 denier polyurethane elastic yarn is stretched 3.2 times,
Lower bobbin rotation speed 36,000 rpm, winding number 2,400 t /
m, upper bobbin rotation speed 30,600 rpm, winding number 2,04
Double covering was performed under the conditions of 0 t / m and a covering speed of 15 m / min. This double covering was finished when the winding bobbin for covering 10 of 10 out of 160 spindles was exhausted (about 6.5 days).

The number of yarn breakages that occurred in this covering process was measured and expressed as the frequency of occurrence of 160 weights per day. Further, the yarn amount of the covering bobbin having residual yarn at the end of the covering was measured and expressed by the maximum value and the average value thereof. The results are shown in Table 1.

In addition, as a comparison, nylon 6 filament yarn (10.0 denier, 7 filaments) by slow spinning-3.8 times draw
The average winding tension is 0.3 g / d according to the conventional method shown in FIG.
(By adjusting the ring tensor), the winding speed was set to 500 m / min (constant), and the winding time was set to 288 min (constant), and rewinding was performed to obtain a covering package (162 g winding). Then, double covering was performed in the same manner as above, and evaluation was performed.

As shown in Table 1, in the cases of Nos. 1 to 3 according to the method of the present invention, the surface hardness of the package is high, and the yarn breakage at the time of covering is 0.24 to 0.33 times / day per one (160 weight). , Significantly less than the conventional method. Furthermore, the residual yarn amount at the end of covering was small, on average 0.2% or less, which was drastically reduced to 1/10 or less of the conventional method (No. 4).

On the other hand, in the case of the conventional method (No. 4), the surface hardness of the package was low, the covering yarn was often broken, and the winding length variation was significantly large.

-Example 2 Nylon 6 filament yarns of various elongations were obtained by ordinary high-speed spinning (No. 5 to 7). The yarn fineness was set to a value of 12.0 denier after the subsequent hot drawing. Table 2 shows the values (productivity ratio) obtained by comparing the productivity of this raw yarn with the productivity when spinning 12.0 denier yarn as a reference.

These nylon 6 filament yarns were stretched at a draw ratio of 1.20 to 1.40 using the hot stretching and twisting device shown in FIG.
Draw roll speed 1,000m / min, yarn length of 20cm in hot drawing part,
A heating temperature of 133 ° C, a take-up bobbin rotation speed of 12,500 rpm, an average take-up tension of 0.18 g / d, and a take-up time (constant) at which the take-up yarn amount is 325 g are drawn, and the yarn is wound up to form a covering package. did.

The obtained package has an inner diameter of 32 mm, an outer diameter of 74 mm, and a winding width of 115 m.
It was m and the winding amount was 325 g.

The yarn layer surface hardness of this package was measured at n = 224, and the results (average value, range) are shown in Table 2. In addition, the measured values of the yarn quality, and the values of the effective draw ratio and the effective winding speed calculated from both the yarn fineness after drawing and the original yarn fineness are also shown.

Furthermore, this package is subjected to a single covering process, and 20 denier polyurethane elastic yarn is stretched 3.2 times,
S winding bobbin rotation speed 34,000 rpm, S winding number 1,700
Single covering was performed under the conditions of t / m and covering speed of 20 m / min. This single covering is one of 224 weights
The test was terminated when there were no more winding threads on the 0 bobbin covering bobbin.

The number of yarn breakages and the amount of residual yarn generated in this covering step were measured in the same manner as in Example 1, and the results were the second.
Shown in the table.

In addition, as a comparison, the No. 6 nylon 6 filament yarn was cold-drawn to 1.38 times and wound with a ring-twisted yarn to manufacture a covering package, which was evaluated by performing single covering in the same manner as above (No. 8). .

As shown in Table 2, in the cases of Nos. 5 to 7 according to the method of the present invention, the surface hardness of the package was high, the yarn breakage at the time of covering was extremely small, and the residual yarn amount at the end of covering was also small. Further, the actual efficiency of stretching (= effective ratio / set ratio) is as high as 97-98%, which is significantly more efficient than that of cold stretching, and the stretching tension can be lowered and the operability during stretching is stable. . Moreover, according to the method of the present invention, the production efficiency of the raw yarn can be increased, and moreover, the yarn fineness at the time of spinning is increased, so that the handling property at the time of spinning is improved,
The production yield also tended to improve. On the other hand, in the case of the comparative example (No. 8) by the cold stretching method, the stretching tension was very high and the effective stretching ratio was also low. Further, there was no problem in covering, but the number of yarn breakages during drawing was rather large.

[Effects of the Invention] The covering package according to the method of the present invention is effective for suppressing yarn breakage in the covering step,
It is possible to sufficiently cope with the speeding up of the covering process and the fineness of the covering yarn.

Furthermore, since the fineness and elongation of the supplied raw yarn can be increased by the amount of heat drawing during the manufacturing of the covering package, the yarn can be easily produced. That is, a fineness covering package can be manufactured from a relatively thick raw yarn,
The raw thread forming process and the package manufacturing process are facilitated to improve productivity.

Moreover, by applying heat in the stretching zone, the actual efficiency at the time of stretching is increased, the stretching efficiency is increased, high-strength stretching can be advantageously performed, and further the operability during stretching can be improved.

Further, the method of the present invention, since it can be carried out by a device that can be relatively easily prepared by appropriately diverting the device parts such as a hot stretching device for nylon fibers, industrial implementation is easy, In addition, the covering package can be stably manufactured without causing troubles such as single yarn cracking, single yarn sagging, and single yarn breakage and a decrease in bundle focusing property.

According to the invention of claim 2, further, since the winding yarn length can be easily controlled and the yarn length varying element between the draw roll and the winding portion can be suppressed to a small value, a covering package having good constant length can be provided. It can be manufactured. Therefore, the operability of the covering machine in the covering process is improved, and it is possible to reduce the amount of covering yarn, the amount of polyurethane elastic yarn, and the labor of the operator.

[Brief description of drawings]

FIG. 1 is a schematic view showing an example of a process of manufacturing a covering package by hot drawing-twisting yarn winding according to the method of the present invention. 2 (a) and 2 (b) are schematic side views showing steps of producing a single covering elastic yarn, and are a side view and a front view, respectively. FIGS. 3 (a) and 3 (b) are schematic side views showing the steps for producing the double covering elastic yarn, and are a side view and a front view, respectively. FIGS. 4 (a) and 4 (b) are diagrams schematically showing the yarn form of the covering elastic yarn, showing a single covering elastic yarn and a double covering elastic yarn, respectively. FIGS. 5 (a) and 5 (b) schematically show a conventional method in which a polyamide filament yarn is rewound onto a bobbin with a collar by a bobbin reeling machine using a friction drive, and a side view and a front view are shown, respectively. . [Explanation of Codes] 1: Original yarn package 4, 5: Constant speed feeding part (feed roll and separate roll) 6: Drawing zone 7: Yarn heating element (hot plate) 12: Rings 10, 10 ', 10 ": Bobbin with collar, package for covering Ya: Yarn (polyamide yarn) Yu: Elastic filament yarn

Claims (2)

[Claims] Claims: 1. A polyamide filament yarn having an elongation of 80% or less is hot-drawn, and subsequently, a ring-twisted yarn is wound on a bobbin with a brim for covering to form a covering package having an average surface hardness of 93 degrees or more. A method of manufacturing a package for covering by hot drawing and winding a twisted yarn. 2. From the start of hot drawing and winding of twisted yarn to the end of winding of a fixed length of time or the end of winding of a fixed length of drawn yarn,
The method for manufacturing a covering package by hot drawing and winding of yarn according to claim 1, wherein the hot drawing and winding of the yarn are automatically stopped.