JP2000272087A - Preparation of plate processing roll for photogravure printing made of aluminum - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prepare with high productivity a plate processing roll for photogravure printing with excellent workability and handling properties by suppressing chatter vibration when such processings as shaping, cutting and grinding are applied on a thinned roll. SOLUTION: After flanges 20 are bonded on the inner part of both ends of a roll main body 10 made of an aluminum, an expandable bag 40 is inserted in the roll main body 10 and a gas G, a liq. or a granulated body is filled in the bag 40 and under a condition where the bag 40 is pressed on the inner peripheral face 13 of the roll main body 10, the outer peripheral face 12 of the roll main body 10 and/or the outer side faces 22 of the flanges are shaped, cut or ground. Instead of the bag 40 filled with the gas G, the liq. or the granulated body, an elastic spiral body being brought into contact with the inner peripheral face 13 of the roll main body 10 and a plurality of rod-like bodies and net-like bodies being fitted on the inner peripheral face 13 of the roll main body 10 can be used. By bringing the bag 40 into contact with the inner peripheral face 13 of the roll main body 10 like this, chatter vibration can be suppressed even by rotating the roll main body 10 at high speed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a gravure printing roll made of aluminum, which is lightweight and excellent in handling and workability.

[0002]

2. Description of the Related Art A plate making roll for gravure printing has a structure in which flanges are attached to openings at both ends of a printing drum which forms irregularities corresponding to a printing pattern on an outer peripheral surface, and bearings are provided in holes formed in the flanges. I have. Recently, instead of iron, rolls made of aluminum or aluminum alloy (hereinafter collectively referred to as aluminum) having excellent lightweight properties have been used (Japanese Patent Laid-Open No. 61-277452, Japanese Utility Model Application Laid-open No. 62-1987).
No. 48564). A gravure printing roll made of aluminum is usually manufactured by a process as shown in FIG. For example, a roll body 10 serving as a base of a printing surface is prepared using an extrusion pipe of 6000 series-T5 material,
A DC casting of system-T6 material is cut out to prepare a flange 20 (a). In order to spigot-connect the flange 20 to the roll body 10, the inner peripheral surface of the end portion of the roll body 10 is cut to form the spigot portion 11, and a hole 21 for mounting a rotating shaft is formed in the flange 20 (b). ). The flange 20 is fitted into the spigot portion 11 having a step by cutting, and the flange 20 is joined to the end of the roll body 10 by press fitting, shrink fitting, bonding, welding, or the like (c). Next, the outer peripheral surface 12 of the roll body 10 and the outer surface 22 of the flange 20 are chamfered (d), and the surfaces are activated by zincate treatment or the like, and then a Cu plating layer 31 is formed on the outer peripheral surface 12 and the outer surface 22. (E) The surface of the Cu plating layer 31 is polished (f) to complete the roll manufacturing process.

When the manufactured roll is used for printing, a thick Cu plating layer 32 used as a printing surface is provided on the Cu plating layer 31 (g). Thick Cu plating layer 32
Has a thickness of 80 to 100 μm. When used for repeated printing, ballad plating for forming the thick Cu plating layer 32 is performed after the roll body 10 on which the Cu plating layer 31 is formed is immersed in a silver nitrate solution so that the thick Cu plating layer 32 is easily peeled off. . When the thick Cu plating layer 32 is semipermanently used for a printing surface, the thick Cu plating layer 32 is provided directly on the Cu plating layer 31. The thick Cu plating layer 32 has concave portions 3 serving as ink pits during gravure printing.
3 are formed (h). The concave portion 33 is formed to a depth of 30 to 60 μm by engraving, etching or the like. Next, a hard chrome plating layer 34 is provided on the thick Cu plating layer 32 in order to impart abrasion resistance. Hard chrome plating layer 34
Is used as a printing surface, and gravure printing is performed (i). When changing the printing surface, the thick film Cu plating layer 32 is peeled off, the thick film Cu plating layer 32 is newly provided on the Cu plating layer 31 by a ballad plating method, and a concave portion 33 having a required pattern pattern is formed (j). ).

[0004]

Even if the roll body 10 is made of aluminum, for example, an extruded T5 material of an Al—Mg—Si aluminum alloy is used for the roll body 10.
-When an aluminum material such as a Mg-based material is used for the flange 20, a lightweight aluminum gravure printing roll having sufficient strength to withstand the printing pressure can be obtained. However, even more severe demands for improvement in workability and handleability are increasing, and accordingly, it is necessary to make the roll body 10 thinner. When the roll body 10 is thinned,
Chatter vibration is likely to occur during processing such as facing, cutting, and polishing. In particular, when the thickness of the roll body 10 is about 8 mm or less, chatter vibration becomes remarkable when the roll body 10 is rotated at high speed during processing. If there is chatter vibration, the gap between the outer peripheral surface 12 of the roll body 10 and the cutting tool becomes unstable, and the required dimensional accuracy cannot be obtained. As a result, when performing gravure printing using the manufactured plate making roll, the printed matter may not sufficiently contact the outer peripheral surface of the plate making roll, and there is a possibility that printing unevenness may occur. In addition, high-speed rotation of the plate-making roll required for high-speed printing cannot be performed.

[0005]

SUMMARY OF THE INVENTION The present invention has been devised in order to solve such a problem. An insert for improving the vibration damping capacity is inserted into a roll body to perform face milling, cutting, polishing and the like. An object of the present invention is to obtain an aluminum gravure printing plate making roll which does not generate chatter vibration even when it is made thin and has excellent dimensional accuracy. The production method of the present invention, in order to achieve the object, after joining a flange inside both ends of the aluminum roll body, insert the bag inside the roll body, filling the bag with gas, liquid or granular material, The outer peripheral surface of the roll main body and / or the outer peripheral surface of the flange are chamfered, cut or polished while the bag is pressed against the inner peripheral surface of the roll main body. Instead of a bag filled with gas, liquid, or granular material, an elastic spiral body that comes into contact with the inner peripheral surface of the roll body, or a plurality of pieces that are attached to the inner peripheral surface of the roll body Rods, nets, etc. can also be used. Further, the vibration damping effect of the bag, the spiral body, the rod-shaped body, the net-shaped body and the like is effective not only for a roll having a reduced thickness but also for a roll body having a normal thickness.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 2, a roll processed according to the present invention has a flange 20 fitted in a spigot portion 11 formed on the inner surface of both ends of a roll body 10, and the flange 20 is formed on the outer surface 22 or the inner surface 23 side. It is welded to the roll body 10. The flange 20 can be joined to the roll body 10 by press fitting, shrink fitting, adhesion, or the like instead of welding. After the flange 20 is joined, the outer peripheral surface 12 of the roll body 10 and the outer surface 22 of the
Finish to the surface for forming u-plated layer 31. Prior to facing, the bag 40 is inserted into the roll body 10. As the bag 40, a bag made of a sheet material such as vinyl is preferable when the bag is filled with a fluid such as gas or liquid. As the bag 40 for filling the granular material, bags of various materials are used as long as the granular material is not spilled. The bag 40 has an opening 41 into which gas, liquid, granular material, and the like are injected. The mouth portion 41 connects the bag 40 to the roll body 10.
Has a length protruding from the hole 21 to the side of the outer side surface 22 when disposed inside. In order to facilitate injection of gas, liquid, granular material, and the like, it is preferable that the mouth 41 be relatively hard.

The bag 4 disposed inside the roll body 10
When gas G, liquid, etc. are injected into the port 0 through the port 41,
The bag 40 until the inner peripheral surface 13 of the roll body 10 contacts
Expands inside the roll body 10. As a granular material,
Sand, plastic pieces, etc. are used. After the bag 40 is inflated, the mouth 41 is closed with the cock 42 so that the state of contact between the inner peripheral surface 13 and the bag 40 is maintained. The outer peripheral surface 12 of the roll main body 10 and the outer peripheral surface 22 of the flange 20 are chamfered while rotating the roll main body 10 while the inflated bag 40 is in contact with the inner peripheral surface 13. The vibration of the roll body 10 caused by the rotation is absorbed as the flow of the gas G, the liquid, or the granular material filling the bag 40, and does not cause large chatter vibration. Therefore, even with the roll body 10 having a reduced thickness, the surface can be cut with high processing accuracy. The vibration suppression by the bag 40 is not limited to facing,
It can be applied to cutting, polishing and the like in a later process.

The bag 40 does not need to contact the entire inner peripheral surface 13 of the roll body 10 in the expanded state, and the inner peripheral surface 13 on the flange 20 side is not in contact with the bag 40 (FIG. 2B). However, sufficient vibration damping ability can be obtained. In addition, it is not necessary to contact the entire inner peripheral surface 13;
Partial contact may be made as shown in FIG. As the bag 40, in addition to the cylindrical shape (FIG. 2c), a triangular cylindrical shape (FIG.
e) A bag 40 having a shape such as a square tube is also used. When gas G, liquid, or the like is injected into the cylindrical bag 40 and inflated, the bag 40 in the circumferential direction of the inner peripheral surface 13 is inflated.
Contact evenly. When the rectangular cylindrical bag 40 is inflated, the bag 40 partially contacts in the circumferential direction of the inner peripheral surface 13. In any case, the vibration damping ability is enhanced by the contact of the bag 40 with the inner peripheral surface 13, and chatter vibration does not occur when the roll body 10 rotates. After the processing is completed, the gas G, liquid, granules and the like inside are discharged to deflate the bag 40, and the bag 40 is extracted from the roll body 10 through the hole 21.

The chatter vibration is also suppressed by inserting an elastic spiral body 43 inside the roll body 10. As the spiral body 43, an elastic synthetic resin such as vinyl is used. As shown in FIG. 3, when the spiral body 43 is inserted from the hole 21 of the flange 20, the spiral body 43 spreads inside the roll body 10 and comes into contact with the inner peripheral surface 13. The contacted spiral body 43 absorbs the vibration of the roll main body 10 as elastic deformation and suppresses chatter vibration. After the processing, the spiral body 43 is pulled out from the hole 21.

The chatter vibration of the roll body 10 can be suppressed by a damping member 45 such as a rod or a net. As shown in FIG. 4 (a), for example, as shown in FIG.
5b is preferred. If an attachment portion such as an adhesive portion 45c to which an adhesive is applied is provided in the middle of the bar portion 45a, the vibration damping member 45 is attached to the inner peripheral surface 13 of the roll body 10.
Can be easily attached. However, the vibration damping member 45 is provided inside the roll body 10 without providing an attaching portion such as the adhesive portion 45c.
The chattering vibration is suppressed only by inserting. The vibration damping member 45 is inserted into the inside of the roll main body 10 through the hole 21 and attached to the inner peripheral surface 13 via the adhesive portion 45c. When the vibration damping members 45 are attached to the inner peripheral surface 13 at equal intervals in the circumferential direction (FIG. 4c), the moment of inertia in the circumferential direction is averaged, and chatter vibration is effectively suppressed when the roll body 10 rotates. . After the processing, a rod (not shown) having a hook is inserted into the roll body 10 through the hole 21 and the hook is hooked on the locking portion 45b and pulled out, whereby the vibration damping member 45 is taken out from the roll body 10. It is.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The roll body 10 is 200 mm in diameter, 628.3 mm in circumference, 8.0 mm in thickness, and 1000 mm in body length.
Extruded aluminum alloy pipe (6063-T5 material). As the flange 20, a disk having a diameter of 187 mm and a height of 20 mm was cut out from an aluminum DC casting and a rotary shaft mounting hole 21 having a tapered center portion.
Was opened. The inner peripheral surface of the end portion of the roll body 10 is cut,
A spigot part 11 having an axial length of 20 mm and a step of 1.5 mm
Was formed. The flange 20 was fitted into the spigot portion 11, the outer surface 22 was welded to the end surface of the roll body 10, and the flange 20 was joined to the roll body 10. Next, a synthetic resin bag 40 having a volume of 0.23 m ³ when inflated in a free state was put into the inside of the roll body 10, and air at 1.1 atm was blown as gas G from the mouth 41. In this state, the outer peripheral surface 12 of the roll body 10 and the outer surface 22 of the flange 20 are cut at a cutting speed of 600 m / min and a cutting feed amount of 0.2 m.
The surface was cut with an NC lathe at m / rotation. During the face milling, the roll body 10 was rotated at 1000 rpm with respect to the cutting tool. However, since there was no chatter vibration, the face milling conditions were stabilized, and a good finished surface was obtained.

For comparison, in the roll body 10 in which the bag 40 was not inserted, when the rotation speed was set to 800 rpm or more, chatter vibration occurred, and the conditions for facing were unstable. For this reason, face milling with a reduced rotation speed and feed speed is required, and a long machining time is required. Chatter vibration was similarly suppressed by inserting the spiral body 43 or the vibration damping member 45 inside the roll body 10. Also in this case, since there was no chatter vibration, the conditions for the facing were stabilized, and a good finished surface was obtained.

[0013]

As described above, according to the present invention, a bag, a spiral body, a rod-like body, a net-like body, and the like are inserted into the inside of the roll body, and the roll body is rotated at a high speed to cut the surface.
It suppresses chatter vibration that tends to occur when performing processing such as cutting and polishing. Therefore, even when the roll body is made thinner to improve workability and handleability, a good finished surface is obtained, and a high quality gravure printing roll is obtained. In addition, since processing can be performed while rotating at high speed without occurrence of chatter vibration, productivity of the plate making roll is also improved.

[Brief description of the drawings]

FIG. 1 is a manufacturing process diagram of a gravure printing plate making roll.

FIG. 2 shows a state in which a bag is inserted into a roll body to which a flange has been joined according to the present invention (a), and the bag is inflated and brought into contact with the inner peripheral surface of the roll body (b).

FIG. 3 shows a roll in which a spiral body is brought into contact with the inner peripheral surface of a roll body.

FIG. 4 is a cross-sectional view (b) of a state in which a rod-shaped or net-shaped vibration damping member (a) is brought into contact with the inner peripheral surface of the roll body viewed from a direction perpendicular to the roll axis, and a cross-sectional view viewed from the roll axis direction ( c)

[Explanation of symbols]

10: Roll 11: Inlay part 12: Outer peripheral surface
13: inner peripheral surface 20: flange 21: hole 22: outer surface 2
3: Inside surface 40: Bag 41: Mouth 42: Cock 4
3: spiral body 45: damping member 45a: bar portion
45b: locking part 45c: adhesive part

Claims (3)

[Claims] After joining a flange to both ends of an aluminum roll body, a bag is inserted into the inside of the roll body, and the bag is filled with gas, liquid or granular material, and the bag is placed on the inner peripheral surface of the roll body. A method of manufacturing a plate-making roll made of aluminum for gravure printing, wherein the outer peripheral surface of the roll body and / or the outer surface of the flange are chamfered, cut or polished in a pressed state. 2. After joining a flange to both ends of an aluminum roll main body, an elastic spiral body is inserted into the roll main body, and the outer peripheral surface of the roll main body is in a state where the spiral body contacts the inner peripheral surface of the roll main body. And / or a method of manufacturing an aluminum plate roll for gravure printing, wherein the outer surface of the flange is chamfered, cut or polished. 3. A flange is joined to both ends of an aluminum roll main body, and a plurality of rods or meshes long in the roll axis direction are attached to an inner peripheral surface of the roll main body, and an outer peripheral surface and / or a flange of the roll main body are attached. A method for producing an aluminum gravure printing plate making roll, in which the outer surface of the aluminum plate is chamfered, cut or polished.