JP4906427B2 - Manufacturing method of fiber lining roll - Google Patents

Description

  The present invention relates to a method for producing a fiber lining roll used for a steel sheet conveying roll or the like, and relates to a method for rationally producing a fiber lining roll having a relatively uniform and flat surface.

  A fiber lining roll has a fiber layer formed on the surface of a lining roll, and has conventionally been used as a nip roll, a guide roll or the like as a transport roll for a steel plate or the like. Various methods are known as a manufacturing method of a fiber lining roll. For example, a nonwoven fabric is cut out in a donut shape and laminated in the axial direction of the temporary shaft to form a fiber layer on the surface of the temporary shaft. Then, the fiber layer is compressed in the axial direction and impregnated with a resin to be molded. Thereafter, a method is known in which a temporary shaft is removed to obtain a fibrous hollow cylindrical body, and this is fitted to a lining roll. In this method, since a temporary shaft is inserted into the center hole of the doughnut-shaped nonwoven fabric, even if it is compressed in the axial direction, it is uniformly compressed as a whole, and the fiber layer surface has a relatively uniform and flat surface. There is an advantage that you can.

  However, since this method cuts out the nonwoven fabric into a donut shape, there are disadvantages in that many pieces are generated and the material is wasted. For this reason, a fiber layer is formed by winding a belt-shaped nonwoven fabric spirally in the axial direction of the winding temporary shaft (Patent Document 1). Then, this fiber layer is compressed in the axial direction of the winding temporary shaft and impregnated with resin to produce a fibrous hollow cylindrical body.

  This method has the advantage that the nonwoven material is not wasted, but has the disadvantage that it is difficult to compress the fiber layer uniformly when compressing the fiber layer in the axial direction as compared to the case of using a donut-shaped nonwoven fabric. It was. That is, a part of the strip-shaped non-woven fabric wound spirally sometimes swells away from the winding temporary shaft. In particular, when the length of the fiber layer in the axial direction is long, the belt-like non-woven fabric at the center may swell outward due to pressure from both ends.

Japanese Patent Publication No. 7-30783

  This invention makes it a subject to prevent that a fiber layer swells outside, when compressing the fiber layer formed by winding around a winding temporary shaft to an axial direction. And this inventor solved this subject by using the specific braided string currently used as packing instead of the strip | belt-shaped nonwoven fabric used by patent document 1. FIG.

That is, the present invention comprises a core material and a braided structure that covers the core material, and the braided structure uses a braided string formed by braiding a thread-like material to form a fibrous hollow cylindrical body or The present invention relates to a method for producing a fiber lining roll. As a specific means, a method of producing a fibrous lining roll by manufacturing the fibrous hollow cylindrical body by adopting the following steps (a) to (d) and fitting the hollow hollow cylinder to a lining roll. Is mentioned.
(A) A step of preparing a braided string composed of a core material and a braided structure covering the core material, wherein the braided structure is formed by braiding a thread-like material.
(B) A step of spirally winding the braided string in the axial direction of the winding temporary shaft and forming a fiber layer on the surface of the winding temporary shaft.
(C) A step of compressing the fiber layer in the axial direction of the winding temporary shaft and impregnating the fiber layer with the curable resin, and then curing the curable resin.
(D) A step of removing the winding temporary shaft after curing the curable resin.

  In the present invention, first, a braided string 1 is prepared (FIG. 1). The braided string 1 includes a core material 2 and a braided structure 3 that covers the core material 2. The core material 2 runs in the longitudinal direction of the braided string 1. The core material 2 may be one or a plurality of two or more. As the core material 2, a linear material such as a spun yarn, a monofilament yarn, a multifilament yarn, a drawn metal wire, or a glass fiber yarn is used. The braided structure 3 is braided in a state where the periphery of the core material 2 is covered. That is, the braided structure 3 can be formed by knitting, weaving, or combining the yarns 4 around the core material 2. The yarn 4 used for forming the braided structure 3 may be any yarn as long as it is used as a yarn, and generally a spun yarn or a multifilament yarn is used.

  As the yarn-like material 4 for braiding the braided structure 3, a spun yarn or a multifilament yarn obtained by mixing a low melting point fiber and a fiber that does not melt at a temperature at which the low melting point fiber melts can be used. The low melting point fiber may be one in which the entire fiber melts or a composite type in which at least a part of the fiber surface melts. Examples of the latter may be a core-sheath type composite fiber or a side-by-side type composite fiber in which a low melting point component as a sheath component and a high melting point component as a core component are combined. Specifically, a core-sheath type composite fiber or a side-by-side type composite fiber composed of a low melting point component / high melting point component such as polyethylene / polypropylene, polyethylene / polyester, low melting point polyester / high melting point polyester, or the like is used. Further, when a spun yarn or a multifilament yarn is used as the core material 2, the same material as the filament 4 is mixed, that is, a low melting point fiber and a fiber that does not melt at a temperature at which the low melting point fiber melts. A spun yarn or a multifilament yarn may be used.

  The cross-sectional shape of the braided string 1 may be any shape such as a circle, a square, or a rectangle. In general, when winding in a spiral shape, a square or a rectangle which is a shape that can be easily wound tightly without a gap is preferable. Such a braided string 1 is commonly used as a packing.

  The braided string 1 is wound spirally in the axial direction of the winding temporary shaft 5 (FIG. 2). The braided string 1 is generally wound around the surface of the winding temporary shaft 5 so as to be a single layer, but it may be wound around two or more layers. When the braided cord 1 is wound, a fiber layer made of the braided cord 1 is formed on the surface of the winding temporary shaft 5.

  The fiber layer formed of the braided string 1 formed on the surface of the winding temporary shaft 5 is compressed in the axial direction by the pressurizing disk 6. The degree of compression is arbitrary, but in general, the axial length of the fiber layer should be approximately halved. Then, the fiber layer is impregnated with the curable resin in a compressed state. The curable resin may be a heat curable resin, a room temperature curable resin, or a moisture curable resin. Generally, a thermosetting resin is used, and an epoxy resin, a urethane resin agent, a phenol resin, or the like is used. After the fiber layer is impregnated with the curable resin, the fiber layer that is cured and maintained in a compressed state is formed on the surface of the winding temporary shaft 5. It is also possible to impregnate the curable resin before compression, and then to compress the curable resin by compression.

  When the braided string 1 is made of braided yarn 4 in which a low melting point fiber and a fiber that does not melt at a temperature at which the low melting point fiber melts are used, it is possible not to use a curable resin. is there. That is, when a fiber layer is formed by the same method as described above and heated to a temperature at which the low melting point fiber is softened or melted in a compressed state, the softened or melted low melting point fiber is fixed by cooling. The fiber layer is kept in a compressed state. Also, before or during compression, the fiber is heated to a temperature at which the low-melting-point fiber is softened or melted, and after cooling is cooled, the softened or melted low-melting-point fiber is fixed to hold the fiber layer in a compressed state. Also good. In this case, if the low melting point fiber is mixed also in the core material 2 of the braided string 1, the compressed state of the fiber layer can be more effectively maintained. In addition, even if it is a case where the braided string 1 with which such a low melting point fiber was mixed, you may hold | maintain a compression state using curable resin. Furthermore, you may use together holding | maintenance of the compression state by softening or fusion | melting and fixation of a low melting point fiber, and holding | maintenance of the compression state by curable resin.

  When the curable resin is cured or the low melting point fiber is fixed and the compressed state is maintained, and then the fiber layer formed on the surface of the winding temporary shaft 5 is removed from the winding temporary shaft 5, the fiber hollow A cylinder is obtained. And if this fibrous hollow cylindrical body is fitted to the surface of the lining roll, a lining roll can be obtained. Of course, since the surface of the fiber hollow cylinder has some irregularities, the surface is polished before being removed from the temporary winding shaft 5, after being removed, or after being fitted to the lining roll. A lining roll having a smooth surface is preferable. In addition, when only the fibrous hollow cylinder is provided to the user of the lining roll and the lining roll is assembled on site, it is preferable to reinforce the fibrous hollow cylinder. This is to prevent the hollow hollow cylinder from being crushed or deformed during conveyance while the fibrous hollow cylinder is provided to the user. For this reinforcement, a fabric such as a knitted fabric or a nonwoven fabric may be bonded to the inner peripheral surface of the fibrous hollow cylindrical body. The bonding method is arbitrary, for example, it may be bonded with an adhesive.

  Moreover, when the axial length of the lining roll is long, after obtaining a plurality of fibrous hollow cylindrical bodies, they may be fitted in a state of being laminated in the axial direction of the lining roll. And after fitting, it may compress a little with a fixing flange from both ends, and each fibrous hollow cylindrical body should be stuck, and it may be set as a lining roll.

  Each of the above explanations relates to a method of obtaining a lining roll by once obtaining a fibrous hollow cylindrical body and then fitting it onto the surface of the lining roll. In the present invention, a lining roll can be obtained all at once in addition to such a method. This method is specifically described as follows. That is, (a) a core material and a braided structure covering the core material, the braided structure preparing a braided string formed by braiding a thread-like material, and (x) an outer diameter thereof. A step of preparing a winding roll in which the same lining roll and winding temporary shaft are connected in series in the axial direction; and (b3) spirally winding the braided string in the axial direction of the winding roll, A step of forming a fiber layer on the surface of the winding roll; and (c3) compressing the fiber layer in the axial direction of the winding roll so that the fiber layer portion existing on the surface of the winding temporary shaft A step of moving to the surface of the lining roll, (d) a step of impregnating the fiber layer with a curable resin and then curing the curable resin, and (e3) the winding roll after the step (c3). And a step of removing the winding temporary shaft that constitutes the fiber lining, It is a method of manufacturing Lumpur.

  As the braided cord 1 used in this method, the braided cord 1 described above is used, but the object around which the braided cord 1 is wound is different. That is, in this method, the lining roll 7 and the winding rolls 5 and 7 in which the winding temporary shaft 5 having the same outer diameter as that of the lining roll 7 is connected in series in the axial direction are knitted. The braid 1 is wound (FIG. 4). A flange 8 is provided in the vicinity of one end of the lining roll 7 (one end to which the winding provisional shaft 5 is not connected), and the braided string 1 is generally wound from this one end side. The braided string 1 is spirally wound from the lining roll 7 to the vicinity of one end of the winding temporary shaft 5 (one end where the lining roll 7 is not connected). And a fiber layer is formed in the surface of the winding rolls 5 and 7 with which the to-be-lined roll 7 and the winding temporary shaft 5 were connected.

  After the fiber layer is formed on the winding rolls 5 and 7, the fiber layer is compressed in the axial direction, and the fiber layer portion formed by being spirally wound around the temporary winding shaft 5 is entirely covered with the lining roll 7. Move to the surface. That is, in FIG. 4, the fiber layer wound spirally is compressed from the upper end side toward the lower end side, and the fiber layer portion existing on the surface of the winding temporary shaft 5 located above is moved downward. It is moved to the surface of the lining roll 7 that is positioned. And a flange is fixed to the other end vicinity of the lining roll 7 so that the moved fiber layer may not move. For example, a shaft retaining ring mounting groove is provided in the vicinity of the other end of the lining roll 7, the flange is fitted from the other end side, and is press-fitted inward from the shaft retaining ring mounting groove. The flange is fixed by attaching the retaining ring for the shaft to.

  Thereafter, in the same manner as described above, the fiber layer may be impregnated into the fiber layer and cured. Further, when a braided cord 1 in which a low melting point fiber is mixed is used, the fiber layer may be heated to soften or melt the low melting point fiber, and then cooled and fixed. The winding tentative shaft 5 may be removed at any point after the fiber layer is moved to the surface of the lining roll 7. For example, after the fiber layer is moved to the surface of the lining roll 7, it may be removed before impregnating the curable resin or before softening or melting the low melting point fiber, or after the curable resin is cured or low The melting point fiber may be removed after being softened or melted, cooled and fixed.

  As described above, a fibrous lining roll can be obtained directly without going through the step of obtaining a fibrous hollow cylindrical body. Of course, since there are slight irregularities on the fiber surface of the fiber lining roll, it is preferable to polish the surface to form a lining roll having a smooth surface.

  The manufacturing method of the lining roll which concerns on this invention uses a specific braided string instead of using a strip | belt-shaped nonwoven fabric to form a fiber layer by spirally winding a fiber material around a winding temporary shaft. . The specific braided string is composed of a core material and a braided structure covering the core material. Therefore, even if the fiber layer is compressed from both ends after being spirally wound, and the fiber layer is compressed from one end to the other end, the core does not swell outward. On the other hand, the braided structure tries to expand outward due to compression, but since the core material is present inside the braided structure, the core material prevents the outward expansion. Therefore, according to the method of the present invention, the fiber layer can be prevented from bulging outward during compression, and a fiber lining roll having a relatively uniform and flat surface can be obtained reasonably.

  EXAMPLES Hereinafter, although this invention is demonstrated based on an Example, this invention is not limited to an Example. The present invention should be construed as based on the knowledge that a fiber lining roll having a uniform and flat surface can be reasonably obtained if a specific braided string is used in place of the belt-shaped nonwoven fabric.

Example 1
[Preparation of braided string]
Cross-sectional shape: square of 8 mm × 8 mm Core material: 15 twin yarns composed of 20th spun yarn obtained by blending 50% by mass of polyester fiber and 50% by mass of cotton fiber Braided structure; 50% by mass of polyester fiber Knitted so as to cover the periphery of the core material using a double yarn consisting of 20th spun yarn blended with 50% by mass of cotton fiber.

[Winding process]
A braided string was wound spirally in the axial direction on the surface of an iron pipe (winding temporary shaft) having an outer diameter of 105 mmφ. The winding was performed in one layer, and the winding length in the axial direction of the iron pipe was 600 mm, and a fiber layer was formed on the surface of the iron pipe.

[Compression and resin impregnation process]
At both ends of the fiber layer, iron rings were attached as pressurizing disks, and the iron rings were pressurized and compressed until the winding length reached 300 mm. Then, this compressed state was maintained, and 300 g of an epoxy resin solution was impregnated from the surface of the fiber layer. The epoxy resin solution used was a mixture of bisphenol A and amide / amine diluted 5 times with a solvent.

[Curing and removing process]
Thereafter, the epoxy resin was cured by heating at 130 ° C. for 3 hours. And the fiber layer was removed from the iron pipe, and the fibrous hollow cylinder was obtained. This fibrous hollow cylindrical body had an inner diameter of 105 mmφ, an outer diameter of 126 mmφ, and an axial length of 300 mm.

[Fabric lining roll creation process]
The fibrous hollow cylindrical body was fitted to an iron shaft (outer diameter: 105 mmφ) that is a lining roll, and both ends were fixed with fixing flanges. Then, the iron shaft was attached to a lathe, the surface was polished, and the surface of the fibrous hollow cylindrical body was scraped off by about 0.5 mm. As described above, a roll lined with fibers was obtained. The fibrous lining roll had an outer diameter of 125 mmφ, a lining axial length (axial length of the fibrous layer) of 300 mm, and a lining thickness (fibrous layer thickness) of 10 mm.

Example 2
[Preparation of braided string]
Cross-sectional shape: 11 mm × 8 mm rectangular core; 20 twin yarns made of 20th spun yarn obtained by blending 60% by mass of nylon 66 fiber and 40% by mass of cotton fiber Braided structure; 60% by mass of nylon 66 fiber % And cotton fiber 40% by weight, and knitted so as to cover the periphery of the core material using a 20th spun yarn.

[Winding process]
A braided string was wound spirally in the axial direction on the surface of an iron pipe (winding temporary shaft) having an outer diameter of 126 mmφ. The winding was performed in one layer, and the winding length in the axial direction of the iron pipe was 600 mm, and a fiber layer was formed on the surface of the iron pipe.

[Compression and resin impregnation process]
At both ends of the fiber layer, iron rings were attached as pressurizing disks, and the iron rings were pressurized and compressed until the winding length reached 303 mm. Then, this compressed state was maintained, and 200 g of a urethane resin solution (“Evaphanol APC-66” manufactured by Nikka Chemical Co., Ltd.) was impregnated from the surface of the fiber layer.

[Curing and removing process]
Thereafter, the urethane resin was cured by heating at 140 ° C. for 2 hours. And the fiber layer was removed from the iron pipe, and the fibrous hollow cylinder was obtained. This fibrous hollow cylindrical body had an inner diameter of 126 mmφ, an outer diameter of 151 mmφ, and an axial length of 303 mm.

[Fabric lining roll creation process]
By the above process, four fibrous hollow cylinders were obtained. Then, each fibrous hollow cylindrical body was sequentially fitted on an iron shaft (outer diameter 126 mmφ, shaft length 1200 mm) as a lining roll. At this time, the fiber hollow cylinders were sequentially fitted so as to have an axial length of 300 mm while being slightly pressurized, and then both ends were fixed with fixing flanges. Then, the iron shaft was attached to a lathe, the surface was polished, and the surface of the fibrous hollow cylindrical body was scraped off by about 0.5 mm. As described above, a roll lined with fibers was obtained. This fibrous lining roll had an outer diameter of 150 mmφ, a lining axial length (axial length of the fibrous layer) of 1200 mm, and a lining thickness (fibrous layer thickness) of 12 mm. Moreover, since this lining was hardened with a urethane resin, it was relatively rich in elasticity.

Example 3
[Preparation of braided string]
Cross-sectional shape: 10 mm × 8 mm rectangle Core material: 20 200 denier Kevlar® multifilament yarn 20 braided structure; 200 denier Kevlar® multifilament yarn is used to cover the periphery of the core material What was organized in this way.

[Winding process]
A braided string was wound spirally in the axial direction on the surface of an iron pipe (winding temporary shaft) having an outer diameter of 76.2 mmφ. The winding was performed in one layer, and the winding length in the axial direction of the iron pipe was 400 mm, and a fiber layer was formed on the surface of the iron pipe.

[Compression and resin impregnation process]
At both ends of the fiber layer, iron rings were attached as pressurization disks, and the iron rings were pressurized and compressed until the winding length reached 200 mm. Then, this compressed state was maintained, and 300 g of a phenol resin solution (manufactured by Starlite) was impregnated from the surface of the fiber layer. In addition, this phenol resin solution used what diluted the general purpose phenol resin solution 3 times.

[Curing and removing process]
Thereafter, the phenol resin was cured by heating at 150 ° C. for 2 hours. And the fiber layer was removed from the iron pipe, and the fibrous hollow cylinder was obtained.

[Reinforcing process]
A woven fabric having an apparent thickness of 1 mm (“Technola” manufactured by Teijin Ltd.) was bonded to the inner peripheral surface of the fibrous hollow cylindrical body with an epoxy resin-based general-purpose adhesive. Thereafter, the reinforced fibrous hollow cylindrical body was again fitted into an iron pipe having an outer diameter of 76.2 mmφ, the iron pipe was attached to a lathe, and the surface was polished. After finishing, it was removed from the iron pipe to obtain a reinforced fibrous hollow cylindrical body having an inner diameter of 76.2 mmφ, an outer diameter of 100 mmφ, and an axial length of 200 mm. This reinforced fibrous hollow cylindrical body can be provided to the user of the lining roll as it is, and the user can assemble the lining roll by fitting the shaft roller on the site.

Example 4
[Preparation of braided string]
Cross-sectional shape: 12 mm × 12 mm square core material: 30% by mass of a side-by-side type composite fiber (trade name “ES fiber” manufactured by Chisso Corporation, one component of which is polypropylene and the other component is polyethylene) which is a low melting point fiber, 15 twin yarn braided structure consisting of 20th spun yarn blended with 70% by mass of phenylene sulfide fiber (trade name “Procon” manufactured by Toyobo Co., Ltd.); Side-by-side type composite fiber (one component) which is a low melting fiber 30% by mass of Chisso's product name “ES fiber” (polypropylene and other components polyethylene) and 70% by mass of polyphenylene sulfide fiber (Toyobo's product name “Procon”). Knitted with a 20th spun yarn to cover the core.

[Winding process]
A metal shaft (lined roll) with an outer diameter of 76 mmφ and an axial length of 200 mm and an iron pipe (winding temporary shaft) with an outer diameter of 76 mmφ and an axial length of 250 mm are connected in series in the axial direction and wound. A roll (with an outer diameter of 76 mmφ and an axial length of 450 mm) was prepared. A flange is provided in the vicinity of one end of the metal shaft (the side not connected to the iron pipe), and a braided string is wound spirally in the axial direction from here. The winding was performed in one layer, and a fiber layer was formed on the surface of the winding roll so that the winding length was 400 mm in the axial direction from the metal shaft to the iron pipe.

[Compression process and removal process]
From the other end side of the iron pipe (the side not connected to the metal shaft), a flange is fitted as a pressurizing disk, and this flange is pressed until the winding length of the fiber layer reaches 200 mm. It compressed toward the flange fixed to the one end side (side not connected with the iron pipe). Then, after pressurizing and press-fitting the flange to the inside of the shaft retaining ring mounting groove provided near the other end side (side connected to the iron pipe) of the metal shaft, the shaft retaining ring is inserted into this mounting groove. And fixed the flange. Then, the iron pipe was removed.

[Heating process]
Thereafter, the metal shaft on which the fiber layer was fixed by the flanges on both ends was placed in an oven heated to 130 ° C. and heated for 2 hours. By this heating, the sheath component of the core-sheath type composite fiber in the fiber layer was melted. Then, the metal shaft was taken out from the oven and left until the fiber layer reached room temperature. Thereby, the melt | dissolved sheath component was cooled, the polyphenylene sulfide fiber and the polyphenylene sulfide fiber, and the polypropylene which is a core component adhered, and the fiber layer was integrated as a whole.

[Fabric lining roll creation process]
After the fiber layer reached room temperature, a metal shaft was attached to a lathe, the surface was polished, and the integrated fiber surface was scraped off by about 0.5 mm. As described above, a roll lined with fibers was obtained. This fibrous lining roll had an outer diameter of 100 mmφ, a lining axial length (axial length of the fibrous layer) of 200 mm, and a lining thickness (fibrous layer thickness) of 24 mm. This fibrous lining roll was excellent in chemical resistance because it was not impregnated with a curable resin.

It is the typical perspective view which showed an example of the braided string used by this invention. It is the typical top view which showed an example at the time of winding a braided string on the winding temporary axis | shaft helically in the axial direction. It is the typical top view which showed an example at the time of compressing the fiber layer formed with the braided string wound around the winding temporary shaft surface to an axial direction. It is the typical top view which showed an example at the time of winding a braided string helically in the axial direction around the winding roll which connected the to-be-lined roll and the winding temporary axis | shaft in series in the axial direction.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Braided string 2 Core material 3 Braided structure 4 Filamentous object 5 Winding temporary shaft 6 Pressurization disk 7 Lined roll 8 Flange 9 Shaft retaining groove for shaft

Claims (4)

(A) a core material and a braided structure covering the core material, the braided structure preparing a braided string formed by braiding a thread-like material;
(X) preparing a winding roll in which a lining roll and a winding temporary shaft having the same outer diameter are connected in series in the axial direction;
(B3) a step of spirally winding the braided string in the axial direction of the winding roll, and forming a fiber layer on the surface of the winding roll;
(C3) compressing the fiber layer in the axial direction of the winding roll to move all the fiber layer portions present on the surface of the winding temporary shaft to the surface of the lining roll;
(D) impregnating the fiber layer with a curable resin, and then curing the curable resin;
(E3) After the step (c3), the step of removing the winding temporary shaft constituting the winding roll;
The manufacturing method of the fiber lining roll characterized by comprising. (A1) comprising a core material and a braided structure covering the core material, wherein the braided structure braids a filamentous material in which a low melting point fiber and a fiber that does not melt at a temperature at which the low melting point fiber melts are mixed Preparing a braided string configured as
(X) preparing a winding roll in which a lining roll and a winding temporary shaft having the same outer diameter are connected in series in the axial direction;
(B3) a step of spirally winding the braided string in the axial direction of the winding roll, and forming a fiber layer on the surface of the winding roll;
(C3) compressing the fiber layer in the axial direction of the winding roll to move all the fiber layer portions present on the surface of the winding temporary shaft to the surface of the lining roll;
(D1) heating the fiber layer to soften or melt the low-melting fiber, and then cooling and fixing the fiber layer;
(E3) After the step (c3), the step of removing the winding temporary shaft constituting the winding roll;
The manufacturing method of the fiber lining roll characterized by comprising. Near one end of the lining roll is flange is provided at the other end near the portion to be coupled with the winding temporary shaft is claim 1 or for shaft retaining ring mounting groove for securing the flange is provided The manufacturing method of the fiber lining roll of 2 description. (C3) After the step, after the flange is fitted from the other end of the lining roll, the shaft retaining ring is fixed to the shaft retaining ring mounting groove, and the flange is fixed. The manufacturing method of the fiber lining roll of Claim 3 which fixes a fiber layer.

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