JPH06206668A - Web winding core - Google Patents

Abstract

PURPOSE:To provide a core by which a reflection of a web tip shape terminal can be prevented and which has durability and has such a shape as a web filling method is not limited. CONSTITUTION:A cushion layer 3 and a protective layer 4 formed by using a prepreg material on the outermost periphery are arranged on a cylindrical base material 2, or a belt-like recessed part is arranged on an outer peripheral surface of a core 1 within a range of 5-30% to the whole circumferential length. A belt-like member having a cushion layer and a protective layer formed by using a prepreg material on the outermost periphery is buried there, or the belt-like member having the protective layer formed by using the prepreg material is arranged so as to form a recessed part within a range of 5-10% to the whole circumferential length on the outer peripheral surface of the core 1, and the cross-sectional shape is formed so as to have a shape whose center is flat and thickness is reduced gradually on both sides. When the belt-like member is used, a position detecting part for alignment with the web tip is arranged in a position being in the constant phase relationship from a position of the belt-like member.

Description

Detailed Description of the Invention

The present invention relates to a core for a web which is applied to a surface of a support (hereinafter referred to as a web) such as a paper, a polyester film or a metal thin plate (hereinafter referred to as a web) and which is loaded into a winding device. More specifically, the present invention relates to a core structure improved so as to prevent the tip shape of a wound web from being transferred to another portion of the web.

[0002]

2. Description of the Related Art Products coated with a web or subjected to surface treatment are widely used in industry, and these products are made of expensive materials such as photographic light-sensitive materials and magnetic recording materials. In many cases, improvement of product yield is directly required. Conventionally, there has been a problem that the tip shape of the web wound around the web core is transferred to the upper portion of the web that is sequentially wound due to the winding pressure, and deformation occurs, so that the yield is lowered. The web wound around the web core is adhered to the core by an adhesive tape, electrostatic application, etc., and then sequentially wound onto the inclined, arc-shaped, etc., web ends, and the web ends and cores are wound. A step corresponding to the thickness of the web is generated between the surface and the surface, and a portion which overlaps with the step position which is sequentially wound up is plastically deformed along the shape of the tip of the web (hereinafter, “end reflection”).
That). The terminal reflection causes coating unevenness, pressure fog and the like in the subsequent process, and the yield is reduced. The rate of occurrence of defective products due to the reflection on the edge of the web varies depending on the physical properties of the web, the material of the web core, the outer dimensions, the winding conditions, etc. As measures against this, increase the core diameter, or line the entire circumference of the core with a rubber material such as urethane rubber or nitrile butyl rubber, and use the elastic deformation effect (cushion effect) to suppress terminal reflection. (Japanese Utility Model Laid-Open No. 63-11470, Japanese Patent Laid-Open No. 63-41382)
(See each publication), or an attempt has been made to provide unevenness on the surface of the winding core so as to offset the step at the tip of the web to reduce the image reflection at the end (Japanese Utility Model Publication No. 63-41072, Japanese Utility Model Publication No. 3-373).
51, Japanese Utility Model Publication No. 3-110077).

[0003]

However, increasing the core diameter is disadvantageous in terms of transportation and storage and core cost, and using rubber or artificial leather has a cushioning effect only at the initial stage, Or by repeated use,
The problem that the restoring force is lost and the cushioning effect is weakened is inevitable. (The environment in which the core is loaded is high,
If the atmosphere is humid or corrosive, or the pressure in the radial direction during winding is high, the cushion base material is likely to deteriorate. ) In addition, in a method in which a stepped notch is provided on the surface of the winding core and the depth thereof is gradually reduced, the loading direction of the winding core is limited to one direction, and the tip of the web is accurately aligned to a predetermined position. However, there is a problem in that winding is difficult especially when rotating at high speed.

The present invention has been made in view of the above problems, and does not lose the restoring force even with time or repeated use, is not limited to the loading direction of the web, and can be wound during high speed rotation. An object of the present invention is to provide a winding core that prevents the reflection of the end of a suitable web end shape.

[0005]

The above object of the present invention is to provide a web core having a cylindrical base material and a member made of a material different from the base material laminated on the base material. A web core comprising a layer and a protective layer using a prepreg material on the outermost periphery. Or, in a cylindrical core for a web, on the outer peripheral surface of the core, 5 to 30% of the total length of the circumference of the core, and within a range sufficient to cover the entire width of the end of the web. A web core, wherein a band-shaped recess corresponding to the thickness of the band-shaped member to be embedded is provided, and a band-shaped member having a cushion layer and a protective layer using a prepreg material on the outermost periphery is embedded in the recess. Alternatively, in a cylindrical web core, the outermost circumference is in the range of 5 to 10% with respect to the entire circumferential length on the outer peripheral surface of the core, and within a range sufficient to cover the entire width of the end of the web. A web core, wherein a band-shaped member using a prepreg material is provided, and a cross-sectional shape of the band-shaped member cut in the circumferential direction has a shape in which the center is flat and the thickness is gradually reduced on both sides.
Or, from the position of the strip-shaped member provided with the protective layer using the prepreg material on the outer peripheral surface of the winding core, to a position in a constant phase relationship, a detection unit for detecting the position of the tip of the web to be attached The web winding core described in the above or the above. Achieved by

As the cylindrical base material, in addition to metal, resin-impregnated fiber, resin-impregnated paper, filament winding plastic (hereinafter referred to as FWP) and the like are used. As the cushion layer, artificial leather, industrial felt, Niten, silk fabric, cotton fabric, or the like is used. For the purposes of the present invention, artificial leather and industrial felt are preferred. In the present invention, as the protective layer using a prepreg material, one having both mechanical strength, heat resistance, and flexibility is selected, but a polyester resin, an epoxy resin is used as a reinforcing material such as woven fabric, paper, and mat. A laminated molding material (hereinafter referred to as a prepreg material) impregnated with a thermosetting resin such as the above is preferably used. The type of prepreg material is not particularly limited, but epoxy resin, polyester, phenol resin or the like is used as the resin, and glass fiber cloth, carbon fiber cloth, kraft paper or the like is used as the reinforcing material. The form of the prepreg can be appropriately selected depending on the application, such as prepreg, prepreg / prepreg, and fabric prepreg in one direction. For the purposes of the present invention, for example as protective layer preferably F is
An RP sheet, more preferably a prepreg material obtained by impregnating glass fiber cloth with an epoxy resin is used. The prepreg material is hardened by heat treatment and exhibits excellent mechanical strength and heat resistance, and by using this as a protective layer, the cushion layer with a cushion function is shielded from the external environment and the elastic function Deterioration can be prevented.

Regarding the case of claim 1, in FIG.
The winding core 1 is formed by laminating a cushion layer 3 on a cylindrical base material 2 and a protective layer 4 on the outermost periphery. The method for manufacturing the winding core 1 of the present invention includes, for example, a core base material 2 and a cushion layer 3
It is possible to form the prepreg by the filament winding method or the autoclave method after forming the prepreg, and there is no particular limitation. Further, when the resin melted at the time of molding penetrates into the cushion layer 3 and exerts a bad influence, a heat-resistant plastic film such as a fluororesin film or a polyimide film is attached onto the cushion layer 3 to form a shielding layer (not shown). May be

Regarding the case of claim 2, in FIG.
A recess 5 is provided in a portion of the circumference of the winding core 1 corresponding to the end position of the web 8, and a strip member 6 is embedded therein. Recess 5
The range in which is provided, that is, the range in which the strip-shaped member 6 is embedded depends on the end shape of the web 8, but is preferably in the range of 5 to 30% with respect to the entire circumference of the winding core 1. Band-shaped member 6 to be embedded
Includes a cushion layer such as artificial leather or industrial felt, and a protective layer such as a prepreg material on the surface thereof. In this case, the cushion layer has a thickness of 0.2 mm to 2 mm (preferably 0.5 mm to 1 mm), and the protective layer has a thickness of 0.1 mm to
0.3 mm. It is desirable that the band-shaped member 6 to be embedded is such that the recess 5 is just filled, that is, the level of the surface is substantially aligned with the surface of the core, but ± 0.
Almost the same effect can be obtained within a range of about 3 mm. Since the cushion layer is provided only around the tip of the web on the winding core, the manufacturing cost can be reduced. In addition, by using artificial leather or industrial felt that has a rougher structure than rubber as the cushion material, it is possible to disperse the force when the cushion material is deformed and to cover it with a prepreg layer that is more durable. , The durability of the cushion is improved.

Regarding the case of claim 3, in FIG.
The strip-shaped member 7 is provided on the circumference of the winding core 1 at a portion facing the end position of the web 8 so as to form a convex portion. Unlike what has been described so far, this strip-shaped member 7 does not need to include a cushion layer, and for example, a prepreg material obtained by impregnating glass fiber cloth with epoxy resin is used to heat and apply heat on the circumferential surface of the winding core 1. It can be molded by pressure treatment. The strip-shaped member 7 has a shape corresponding to the end shape of the web 8, and when the end of the web 8 is wound, the strip-shaped member 7 is arranged close to the strip-shaped member 7 to eliminate the step difference in the case of only the end of the web 8. To fulfill. The thickness of the belt-shaped member 7 is preferably within 100 ± 30% of the thickness of the web. The width of the strip-shaped member 7 is preferably 5 to 10% of the circumferential length of the winding core. Further, the cross-sectional shape of the belt-shaped member 7 in the circumferential direction needs to be flat in the center and gradually decrease in thickness on both sides, so that it is necessary to prevent a sharp step due to the belt-shaped member 7 itself. The shape of the strip-shaped member is adapted to the shape of the end of the web, but if the shape is rotationally symmetric, such as an oblique straight line as shown in FIG. 3, the loading direction of the winding core is not limited, which is convenient. good. (Not limited to one direction)

Regarding claim 4, claim 2 and claim 3
Then, since the cushion member is provided only in a certain range on the winding core according to the shape of the tip of the web, it is necessary to align the position when winding. In the case of claim 2, the web end is superposed on the substantially center of the cushion member, but in the case of claim 3, it is necessary to arrange the web tips in close proximity to the strip-shaped member provided on the circumference of the winding core. In either case, the more accurately the positional relationship between the cushion member and the tip of the web is adjusted, the greater the effect of preventing terminal reflection. When the winding operation is stopped, the position can be manually adjusted, but when the winding operation is performed without stopping, the automatic position adjustment is necessary.

FIG. 4 shows how the position detector is attached when the embedded belt-shaped member 6 corresponding to FIG. 2 is used. In this case, a detection unit is provided at a position at a constant phase angle θ from the position of the cushion member, and the detection is performed by optical or electrical means, and the winding position of the tip of the web is corrected by the phase difference from the detection unit. By controlling the core rotating device and the like, the web end can be accurately aligned with a predetermined position. It goes without saying that this method can be similarly applied to the strip-shaped member 7 forming the convex portion corresponding to FIG.

[0012]

【Example】

(Example-1) FRP having a diameter of 350 mm as a cylindrical base material
An industrial felt having a thickness of about 1 mm was used as a cushion layer, and a pre-ply prepreg material having a thickness of about 0.1 mm obtained by impregnating a glass fiber cloth with an epoxy resin was laminated as a cushion layer using a winding core. A Teflon film layer having a thickness of about 30 μm was provided as a shielding layer between the cushion material and the protective layer. In the production of the core, an industrial felt and a Teflon film were wound around the core base material, and then a prepreg material was formed by an autoclave method. A 230 μm-thick photographic printing paper support having a polyethylene laminate was wound around this core. As a result, transcription (reflection on the terminal)
The trace was found only on the first lap, but was not observed at all on the second and subsequent laps.

(Embodiment 2) A cylindrical base material having a diameter of 350
mm FRP winding core is used and the total length of the circumference of the winding core is 15
%, Over a range wider than the width of the web in the width direction, a concave portion 5 is formed obliquely with respect to the core surface length direction according to the end shape of the web (oblique cutting shown in FIG. 2), and a cushion is formed therein. The strips 6 of layers, shielding layers and protective layers were embedded. The cushion layer is made of the same material and thickness as in Example 1 except that the artificial leather having a thickness of 0.8 mm is used, and the surface of the cushion portion is almost the same as the surface of other portions of the core. Same level. A 230 μm-thick photographic printing paper support having a polyethylene laminate was wound around this core.

(Comparative Example-1) A comparison was made with a case where the cushion was wound around an FRP core having a diameter of 350 mm without a cushion portion. Table 1 shows the results of Example-2 and Comparative Example.

[0015]

[Table 1]

As shown in Table 1, in the case of Example-2, the terminal reflection occurred slightly in the first lap, but in the case of Comparative Example-1, the terminal reflection occurred up to the tenth lap.

(Embodiment 3) A cylindrical base material having a diameter of 350
3 mm of FWP winding core was used, and a rectangular strip-shaped member 7 having a width of about 7% of the entire circumference of the winding core and a length wider than the web width was provided in an oblique shape shown in FIG. . As the belt-shaped member 7, a pre-ply prepreg material obtained by impregnating a glass fiber cloth with an epoxy resin was used, and was heated and pressed on the FWP core to be cured. The belt-shaped member 7 has a thickness of 250 μm in the central flat portion and is smoothly thinned on both sides thereof. A 230 μm-thick photographic printing paper support having a polyethylene laminate was wound around this core. As a result, the transfer (reflective image at the terminal) was traced only in the first round, but was not observed at all in the second and subsequent rounds.

[0018]

With the web core of the present invention, the restoring force is not lost over time or repeated use, the loading direction of the web is not limited, and the web tip shape is suitable for winding during high-speed rotation. It was possible to provide a core that prevents the reflection of the terminal on the terminal. Further, in the mode in which the belt-shaped member is partially provided, an additional effect that the winding core is less likely to be damaged by the transportation facility and the like can be obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an embodiment of claim 1 of the present invention.

FIG. 2 is a cross sectional view (A) and a front view (B) of an embodiment of claim 2 of the present invention.

FIG. 3 is a cross sectional view (A) and a front view (B) of an embodiment of claim 3 of the present invention.

FIG. 4 is a cross sectional view (A) and a front view (B) of an embodiment of claim 4 of the present invention.

[Explanation of symbols]

 1 Core 2 Cylinder Base Material 3 Cushion Layer 4 Protective Layer 5 Recess 6 Band Member 7 Band Member 8 Web 9 Detector

Claims (4)

[Claims] 1. A web core comprising a cylindrical base material and a member made of a material different from the base material laminated on the base material, wherein the member is a cushion layer and a protective layer using a prepreg material at the outermost periphery. A core for a web, including: 2. A cylindrical web core, which occupies 5 to 30% of the entire circumference of the core on the outer peripheral surface of the core and covers the entire width of the end of the web. In a range
Provide a band-shaped recess corresponding to the thickness of the band-shaped member to be embedded,
A web core, wherein a band-shaped member having a cushion layer and a protective layer using a prepreg material on the outermost periphery is embedded in the recess. 3. In a cylindrical core for a web, in a range of 5 to 10% with respect to the entire circumferential length on the outer peripheral surface of the core, and within a range sufficient to cover the entire width of the end of the web. A web-shaped winding characterized in that a band-shaped member using a prepreg material is provided on the outermost periphery, and the cross-sectional shape of the band-shaped member cut in the circumferential direction has a shape that the center is flat and the thickness gradually decreases on both sides. core. 4. A position detecting device for detecting a position of a tip of a web to be stuck to a position having a constant phase relationship from a position of a strip-shaped member provided with a protective layer using the prepreg material on an outer peripheral surface of the winding core. 3. A detector for detecting the difference is provided.
Alternatively, the web winding core according to claim 3.