JP2019018373A - Lining core, and manufacturing method of lining core - Google Patents

Abstract

To appropriately make adhesiveness between a soft lining layer formed on a surface of a substrate and a film wound around the lining layer adjustable with a simple structure.SOLUTION: A manufacturing method of a lining core having a cylindrical substrate 11 and a lining layer 12 formed to cover an outer peripheral surface of the substrate 11 and consisting of a soft material, has a lining process for forming a lining core 10 having a blast part 13 having static friction coefficient with a metal material of 0.1 to 0.6 formed on a surface of the lining layer 12 and the lining layer 12 consisting of the soft material so as to cover a surface of the cylindrical substrate 11, and a blast process for conducting a blast treatment on a surface of the lining layer 12 to form the blast part 13 having the static friction coefficient with a metal material of 0.1 to 0.6.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a lining core used for winding various films and sheet materials, and a manufacturing method thereof.

  Various films, sheet materials, and the like are often handled in a state of being wound around a cylindrical core shown in Patent Documents 1 and 2, for example.

  The lightweight roll which concerns on patent document 1 employ | adopted the structure which formed the hard foam layer in the outer periphery of core materials, such as aluminum, and comprised the protective layer which protects this hard foam layer in the outer periphery. As a material for the hard foam layer, for example, urethane resin is used. This urethane resin has adhesiveness to the film, and it may be difficult to remove the wound film. For this reason, when using this roll as a winding roll, the silicon rubber which does not have adhesiveness with respect to a film is used as a raw material of a protective layer (paragraphs 0008-0010 of patent document 1, FIG. 1 (A), ( B) etc.).

  In addition, the winding core according to Patent Document 2 includes a soft smooth region that expresses adhesion between the film and a non-soft smooth region that does not express adhesion between the film on the surface of the core substrate. have. In this way, by forming a non-soft smooth region in part, when the film is wound around the core, the film is prevented from wrinkling or air being entrained, Can be fixed easily. Different materials such as urethane rubber are used for the soft smooth region and plastic materials are used for the non-soft smooth region (see paragraphs 0013 to 0022 of FIG. 4 and FIG. 4).

Japanese Utility Model Publication No. 7-19273 JP 2014-181095 A

  In the configurations according to Patent Documents 1 and 2, in order to make the adhesive force between the films appropriate, a plurality of layers (regions) made of different materials are formed on the outer periphery of the core material (core base material). There is a problem that the manufacturing cost increases.

  Therefore, an object of the present invention is to make it possible to appropriately adjust the adhesiveness between a soft lining layer formed on the surface of a substrate and a film wound around the lining layer with a simple configuration.

  In order to solve the above problems, the present invention has a cylindrical base and a lining layer formed of a soft material so as to cover the outer peripheral surface of the base, and on the surface of the lining layer, The lining core in which the blast part whose static friction coefficient between metal materials is 0.1 or more and 0.6 or less was formed was constituted.

  In this way, by forming a blast portion having a static coefficient of friction in the above-mentioned range on the surface of the lining layer made of a soft material, between the lining layer (blast portion) and the film wound around the lining layer. By adjusting the adhesiveness, it is possible to prevent the film taken up by the adhesive force from becoming difficult to be removed. In addition, the static friction coefficient of the surface of the blast portion only needs to be in the above range, and it is not necessary to form a plurality of layers or regions made of different materials, so that the manufacturing cost can be suppressed.

  In the said structure, it can be set as the structure by which the non-blast part whose static friction coefficient between the said metal materials is 0.75 or more was formed in a part of surface of the said lining layer. By forming a non-blasted portion of the above-mentioned static friction coefficient in a part of the lining layer, while securing the adhesion to the film in a part of the lining layer (non-blasted portion), in the other portion (blasted portion) Adhesion with the film can be prevented. If it does in this way, it can be set as the state which fixed the starting end of the film to the lining layer, and while winding a film around this core stably, the wound film can be removed easily.

  In each of the above structures, the lining layer is preferably made of urethane. A lining layer made of urethane can be formed easily and at low cost. In addition, since urethane has an appropriate elasticity, it is possible to prevent a step from being generated on the surface of the film at the start of film winding. Further, by using urethane as the lining layer, the blast portion can be easily formed on the surface by blasting or the like.

  Further, in the present invention, a lining process for forming a lining layer made of a soft material so as to cover the surface of the cylindrical substrate, and a blasting process is performed on the surface of the lining layer, so that the metal material on the surface And a blasting step for forming a blast portion having a static friction coefficient between 0.1 and 0.6.

  Thus, by performing blasting on the surface of the lining layer formed by the lining process and setting the static friction coefficient of the surface in the above range, as described above, due to the adhesive force between the lining layer and the film, While preventing removal of the wound film, it is possible to reduce the manufacturing cost.

  In the above configuration, it is preferable that the lining layer is made of urethane. If it does in this way, as above-mentioned, a lining layer can be formed easily and at low cost. In addition, the blasting treatment can easily form a blast portion having a static friction coefficient in the above range, and it is possible to prevent the wound film from becoming difficult to be removed.

  According to the lining core and the manufacturing method thereof according to the present invention, the adhesiveness between the soft lining layer formed on the surface of the substrate and the film wound around the lining layer is appropriately adjusted simply and at low cost. be able to. Thereby, it can be reliably prevented that the film taken up by the adhesive force during the handling becomes difficult to remove.

The perspective view which shows 1st embodiment of the lining core which concerns on this invention Schematic diagram showing the measurement position of the static friction coefficient The perspective view which shows 2nd embodiment of the lining core which concerns on this invention

  A first embodiment of a lining core 10 according to the present invention is shown in FIG. The lining core 10 is used as a core material used for winding various films and sheet materials (not shown), and includes a base 11 and a lining layer 12 as main components.

  The base 11 is made of a cylindrical fiber reinforced plastic (FRP). The material of the substrate 11 is not limited to FRP, and various tube bodies such as general resin tubes, metal tubes, and paper tubes are used as long as they have the necessary strength when forming the lining layer 12 or winding a film or the like. You can also The thickness (wall thickness) of the substrate 11 can be appropriately determined according to the nominal diameter and material of the substrate 11, the material of the film to be wound, the winding length, etc., and can be, for example, about 6 to 7 mm. .

  The lining layer 12 is formed so as to cover the entire outer peripheral surface of the base 11. Although this formation method can be determined as appropriate, for example, a method in which a urethane solvent is applied to the outer peripheral surface of the base 11 with an equal thickness and then the solvent is cured can be employed. Although the thickness of this lining layer 12 can be determined suitably, when the thickness of the base | substrate 11 is said range, it can be set as about 1-30 mm, for example.

  The entire surface of the lining layer 12 is formed with a blast portion 13 that has been subjected to blasting so that the coefficient of static friction is 0.1 or more and 0.6 or less.

  The measurement of the static friction coefficient of the blast part 13 was performed using a commercially available friction meter (portable friction meter TYPE: 94i-II, manufactured by Shinto Kagaku Co., Ltd.). In this measurement, a lining layer 10 made of urethane is formed on the surface of the substrate 11 with a predetermined thickness, and the lining core 10 in which the blasting process 13 is formed on the surface of the lining layer 12 is used as a test material. It was.

  First, a small plate made of brass was set on the slider of the friction meter. Next, this tribometer was placed on the surface of the lining layer 12 (blast portion 13) so that the slider (plate-like piece) faced downward. Then, by pressing the measurement button of the tribometer, a sliding force in the tube axis direction of the lining core 10 (see the right-pointing arrow in FIG. 2) is gradually applied to the slider, and the slider starts to slide on the surface of the lining layer 12. The coefficient of static friction was calculated from the sliding force. This measurement is performed by measuring points on the axis (X-ray, Y-line) 90 degrees apart in the circumferential direction of the specimen shown in FIG. A total of 20 points (from “point to j” point) was obtained, and these were averaged to obtain a measured value of the static friction coefficient. Note that the measurement positions and the number of measurement points are merely examples, and can be changed as appropriate.

  A plurality of test materials having different static friction coefficients were prepared by changing the blasting conditions, and the adhesiveness was evaluated by pressing a film against these test materials. As a result, when the static friction coefficient was in the range of 0.1 or more and 0.6 or less, no large adhesive force was generated between the lining layer 12 and the film, and the wound film could be removed smoothly. On the other hand, when the coefficient of static friction was larger than 0.6, it was confirmed that the film could adhere to the lining layer 12 and cause problems such as difficulty in smooth removal. In addition, it is technically difficult to make the coefficient of static friction smaller than 0.1, and even if it can be done, there may be a problem that work costs increase, such as a long time for blasting.

  From the relationship between the measurement result of the static friction coefficient and the adhesive state between the lining layer 12 and the film, the working cost is increased by setting the static friction coefficient within the range of 0.1 to 0.6. While preventing, it is possible to prevent the wound film from becoming difficult to be removed due to the adhesive force between the lining layer 12 and the film.

  A second embodiment of the lining core 10 according to the present invention is shown in FIG. The lining core 10 has the same basic configuration as that of the lining core 10 according to the first embodiment, but the blast layer 13 and the non-blasted portion 14 (the lining layer) that has not been subjected to blasting are formed on the surface of the lining layer 12. This is different in that a portion 12 is exposed as it is on the surface. As described above, the static friction coefficient of the blast portion 13 is in the range of 0.1 to 0.6, whereas the static friction coefficient of the non-blast portion 14 is 0. 75 or more.

  While the film does not adhere to the blast portion 13 of the lining layer 12, the film adheres to the non-blast portion 14. If it does in this way, it can be set as the state which fixed the starting end of the film to the lining layer 12, and while a film can be stably wound around this lining core 10, a film can be removed easily.

  A method for manufacturing the lining core 10 will be described. In this manufacturing method, first, the lining layer 12 was formed of urethane, which is a soft material, so as to cover the surface of the cylindrical substrate 11 (lining process). As this forming method, as described above, a method of applying a urethane solvent to the outer peripheral surface of the base 11 with an equal thickness and then curing the solvent can be employed.

  Next, the surface of the lining layer 12 was blasted using a blasting apparatus. This blasting process was carried out by using spherical beads (about 1 to 2 mm in diameter) as the blasting material and applying the blasting material to the surface of the lining layer 12 at a predetermined speed. As shown in FIG. 3, when the non-blast portion 14 is formed, a mask member is provided at a location corresponding to the non-blast portion 14. By providing this mask member, it is possible to prevent the blast material from hitting the portion, and the non-blast portion 14 can be easily formed. After carrying out the blasting process, it was confirmed with the above-mentioned tribometer that the static friction coefficient of the blast part 13 was in the range of 0.1 to 0.6.

  The above embodiments are merely examples, and the adhesiveness between the soft lining layer 12 formed on the surface of the substrate 11 and the film wound around the lining layer 12 can be appropriately adjusted with a simple configuration. As long as the problem of the present invention can be solved, the configuration can be changed as appropriate.

  In the above-described embodiment, the adhesiveness between the lining layer 12 and a film or the like is based on the coefficient of static friction between the lining layer 12 (blast portion 13 and non-blast portion 14) and the metal material (brass). However, it is also possible to directly measure the static friction coefficient between the lining layer 12 and the film, and to evaluate the tackiness based on the static friction coefficient.

DESCRIPTION OF SYMBOLS 10 Lining core 11 Base body 12 Lining layer 13 Blasting part 14 Non-blasting part

Claims (5)

A cylindrical substrate (11);
A lining layer (12) made of a soft material, formed so as to cover the outer peripheral surface of the base (11);
A lining core in which a blast portion (13) having a coefficient of static friction with a metal material of 0.1 to 0.6 is formed on the surface of the lining layer (12).   The lining core according to claim 1, wherein a non-blast portion (14) having a static friction coefficient with respect to the metal material of 0.75 or more is formed on a part of the surface of the lining layer (12).   The lining core according to claim 1 or 2, wherein the lining layer (12) is made of urethane. A lining step of forming a lining layer (12) made of a soft material so as to cover the surface of the cylindrical substrate (11);
Blasting the surface of the lining layer (12) to form a blast portion (13) having a coefficient of static friction between the surface and the metal material of 0.1 to 0.6;
A method of manufacturing a lining core having   The method for manufacturing a lining core according to claim 4, wherein the lining layer (12) is made of urethane.

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