JPH0550364B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a method for producing a patterned roll by adding an uneven pattern to a cement extrusion molded product.

[Background Art] Immediately after cement is extruded, a patterning roll is used to apply an embossed pattern to the surface of a molded product. The concave-convex pattern for patterning provided on this patterning roll is usually formed using engraving techniques, and therefore, the concave-convex pattern is created using carving techniques such as vertical and horizontal concave and convex patterns or a typical flower pattern. Forming irregularly shaped uneven patterns or complex uneven patterns on the outer peripheral surface of a curved patterning roll, limited to simple objects such as minerals such as stones and rocks, plants such as trees, etc. It was difficult to create such an irregular and complex uneven pattern on a cement molded product.

[Object of the Invention] The present invention has been made in view of the above points, and provides a patterning roll that can easily provide an irregular uneven pattern or a complicated uneven pattern on the surface for patterning. The purpose of this invention is to provide a method for manufacturing.

[Disclosure of the Invention] According to the method for manufacturing a patterned roll according to the present invention, a silicone rubber stock solution 3 is poured onto the surface of a mold 2 having an uneven pattern 1 on the surface and cured, and the cured silicone rubber sheet is cured. 4 to mold 2 uneven pattern 1
The cylindrical shape is rolled up and inserted into the cylindrical body 16 with the uneven surface 5 to which the is transferred is placed inside, and a circular positioning ring 20 is provided protruding from the top surface, and a positioning hole 21 is formed at the center position of the circle of the positioning ring 20. The cylindrical body 16 with its axial direction up and down is fitted onto the inner periphery of the positioning ring 20 and placed on the mold setting table 16 that has been prepared, and the roll core 6 with its axial direction up and down is placed on silicone rubber. Insert the roll core 6 into the inside of the sheet 4, insert its rotating shaft 22 into the positioning hole 21, place it on the mold setting table 19, and align the outer peripheral surface of the roll core 6 with the inner peripheral surface of the silicone rubber sheet 4. During this process, a resin stock solution 7 is poured and cured, and then the silicone rubber sheet 4 is removed from the resin layer 8 fixed to the outer periphery of the roll core 6. With this configuration, the above object is achieved. The present invention will now be described in detail with reference to Examples.

First, mold 2 is created, and this mold 2 is created based on archetype 11. As the master mold 11, one having the same unevenness pattern 12 as the uneven pattern to be formed on the molded product is used.For example, a flat wooden mold can be used, but a stone or rock-like uneven pattern can be used. When forming into a product, a natural stone or rock can be used as it is as the prototype 11. Then, the master mold 11 is set in a molding frame 13, and as shown in FIG. Create type 2. On the surface of this mold 2, a concavo-convex pattern 1 is formed by transferring the concave-convex pattern 12 of the master mold 11.

Next, the mold 2 formed into a flat plate shape as described above is set in the molding frame 15, and as shown in FIG. Make a mold. After the silicone rubber has hardened into a sheet, the silicone rubber sheet 4 is taken out. As shown in FIG. 3, the silicone rubber sheet 4 has an uneven surface 5 to which the uneven pattern 1 of the mold 2 is transferred, and the pattern of the uneven surface 5 is the same as that of the original mold 11. Same as 12. Since this silicone rubber sheet 4 has elasticity and is soft, it can be bent into a cylindrical shape, and as shown in FIG. Insert the bent silicone rubber sheet 4. The cylindrical body 16 is formed by a pair of semi-cylindrical bodies 18 such as a half-cylindrical steel plate with connecting pieces 17 provided at both ends, and a silicone rubber sheet 4 is placed inside the pair of semi-cylindrical bodies 18, 18. The silicone rubber sheet 4 is attached to the cylindrical body 16 by bolting the connecting pieces 17 together while sandwiching the silicone rubber sheet 4 between the outer surface of the silicone rubber sheet 4 and the inner surface of the cylindrical body 16. The silicone rubber sheet 4 is held within the cylindrical body 16 by bonding with adhesive such as double-sided adhesive tape or polyurethane adhesive.

Next, the cylindrical body 16 to which the silicone rubber sheet 4 is attached in this manner is set on a mold setting table 19 as shown in FIG. The mold setting table 19 is provided with a positioning ring 20 protruding from the upper surface thereof, and the cylindrical body 1 is positioned so that the lower end outer periphery of the cylindrical body 16 is fitted into the inner periphery of the positioning ring 20.
Set 6. Furthermore, the roll core 6 is inserted from above into the silicone rubber sheet 4 on the inner periphery of the cylindrical body 16 set in this manner.
At this time, a circular positioning hole 21 whose center coincides with the center of the circle of the positioning ring 20 is formed on the mold setting table 19.
One rotating shaft 2 of a pair of rotating shafts 22 is provided in the center of the roll core 6 and protrudes from both ends of the roll core 6.
2 is inserted into the positioning hole 21 and positioned, then the roll core 6 is set.
By positioning the cylindrical body 16 and the roll core 6 in this way and setting them on the mold setting table 19, the axial center of the silicone rubber sheet 4 and the axial center of the roll core 6 attached to the cylindrical body 16 can be adjusted. This will ensure accurate alignment. After the roll core 6 is inserted and set in the silicone rubber sheet 4 in this way, a stock solution 7 of thermosetting resin such as epoxy resin is poured between the silicone rubber sheet 4 and the roll core 6. If the viscosity of the resin stock solution 7 is high, the resin stock solution 7 may not be able to properly flow into the concave portions of the uneven surface 5 of the silicone rubber sheet 4, and hole defects may occur. It is necessary to lower the viscosity.
In addition, fibers such as hemp, polyamide (nylon), and carbon can be added to the resin stock solution 7 from time to time for reinforcement, and silica sand, nylon, polyester (vinylon), etc. can be added in advance to a resin stock solution such as epoxy resin. By kneading the resin under No. 7, curing shrinkage of the resin can be prevented and reinforcement can be performed.

After the resin has hardened in several hours and a resin layer 8 has been formed on the outer circumferential surface of the roll core 6, the bonding by the bonding piece 17 is removed and the semi-cylindrical body 18 of the cylindrical body 16 is opened to form a silicone rubber sheet. Expand 4,
By removing the silicone rubber sheet 4 from the resin layer 8 of the roll core 6, as shown in FIG.
It is possible to obtain a patterning roll A having a resin layer 8 provided with a concavo-convex pattern 23 formed by transferring the concavo-convex surface 5 of the silicone rubber sheet 4 on the outer peripheral surface. Since the silicone rubber sheet 4 has excellent mold releasability, the silicone rubber sheet 4 can be easily peeled off from the resin layer 8. Also, at this time, when bending the silicone rubber sheet 4 into a cylindrical shape and attaching it to the cylindrical body 16, the butted end of the silicone rubber sheet 4 and the semi-cylindrical body 18 of the cylindrical body 16 are
By aligning the abutting ends of the silicone rubber sheet 4 with the cylindrical body 16, the silicone rubber sheet 4 can also be expanded as the cylindrical body 16 is expanded, making demolding easier. It is what it is.

The patterning roll A produced as shown in FIG. 6 is rolled onto the cement extrusion molded product 26 that has just been extruded from the mold 24 onto the take-off belt 25 as shown in FIG. , molded product 26
It is used to give an uneven pattern to.

Next, to further explain the present invention using a specific example, first, three 300 mm x 200 mm flat plates of Xuansho stone are set side by side in a wooden frame, and plaster is poured into them to create a plaster mold 2. Further, the mold 2 is set in a wooden frame and silicone rubber is poured into it to create a silicone rubber sheet 4 having a thickness of 5 mm with the pattern of the Xuanchang stone copied thereon. This silicone rubber sheet 4 is pasted and attached inside a steel plate cylindrical body 16 having an inner diameter of 200 mm using double-sided adhesive tape. and the outer diameter inside the cylindrical body 16
A 160 mm roll core 6 is inserted and set between the silicone rubber sheet 4 and the roll core 6 using epoxy resin heated to 30°C (for example, product name Devcon B).
After 15 hours, the positioning ring 20 shown in FIG.
is rolled out to obtain a patterning roll A as shown in FIG.

[Effects of the Invention] As described above, in the present invention, a silicone rubber stock solution is poured onto the surface of a mold having an uneven pattern on the surface and cured, and the uneven pattern of the mold is transferred to the cured silicone rubber sheet. Roll it into a cylindrical shape with the uneven surface facing inside, insert the roll core into the cylindrical rolled silicone rubber sheet, and pour the resin stock solution between the outer circumferential surface of the roll core and the inner circumferential surface of the silicone rubber sheet. Since the silicone rubber sheet was cured and then removed from the resin layer fixed to the outer periphery of the roll core to produce a patterned roll, the uneven pattern was first transferred and formed on the flat silicone rubber sheet. By bending this silicone rubber sheet into a cylindrical shape, it is possible to further transfer the uneven pattern to the resin layer on the outer periphery of the roll core. It is possible to easily provide a complex pattern on the roll core compared to the case where a wafer is provided, and it is possible to provide a molded product with a complex and various uneven patterns.

In addition, since the silicone rubber sheet is rolled into a cylindrical shape with the uneven surface on which the uneven pattern has been transferred inside and inserted into the cylinder, the outer circumferential surface of the roll core and the inner circumferential surface of the silicone rubber sheet The cylindrical body can prevent the silicone rubber sheet from deforming when pouring the resin stock solution between the two, and the resin layer for patterning can be formed with accurate outer diameter dimensions. be. Furthermore, a cylindrical body with its axial direction up and down is placed on a mold setting table which is made by providing a circular positioning ring protruding from the top surface and a positioning hole at the center position of the circle of the positioning ring. The roll core is inserted into the inner periphery and placed, and the roll core with the axial direction facing up and down is inserted inside the silicone rubber sheet, and the roll core is inserted with its rotating shaft into the positioning hole and placed on the mold setting table. Therefore, by fitting the lower end of the cylindrical body of the positioning ring, the set position of the cylindrical body can be determined, and by inserting the rotary shaft into the positioning hole, the set position of the roll core can be determined. By positioning the cylindrical body and the roll core and setting them on the mold setting table, it is possible to accurately align the axis of the roll core with the silicone rubber sheet attached to the inner circumference of the cylindrical body. I can do it,
It is possible to form a resin layer with a uniform thickness around the outer periphery of the roll core.

[Brief explanation of the drawing]

Figures 1 and 2 are cross-sectional views of one step of an embodiment of the present invention, Figure 3 is a perspective view of the silicone rubber sheet in the above, and Figure 4 is a state in which the silicone rubber sheet in the above is attached to a cylindrical body. FIG. 5 is a cross-sectional view of one step of the above, FIG. 6 is a perspective view of a patterning roll manufactured by the above,
FIG. 7 is a perspective view showing how the patterning roll is used. 1 is an uneven pattern, 2 is a mold, 3 is a silicone rubber stock solution, 4 is a silicone rubber sheet, 5 is an uneven surface, 6 is a roll core, 7 is a resin stock solution, 8 is a resin layer, 16 is a cylinder, 19 is a mold set 20 is a positioning ring, 21 is a positioning hole, and 22 is a rotating shaft.

Claims (1)

[Claims] 1 Pour silicone rubber undiluted solution onto the surface of a mold with an uneven pattern on the surface and let it harden, then roll the cured silicone rubber sheet into a cylindrical shape with the uneven surface to which the uneven pattern of the mold has been transferred inside, and place it inside the cylinder. on the mold setting table, which was created by providing a circular positioning ring protruding from the top surface and a positioning hole at the center position of the circle of the positioning ring.
A cylindrical body with the axial direction up and down is placed with its lower end fitted into the inner circumference of the positioning ring, and a roll core with the axial direction up and down is inserted inside the silicone rubber sheet, and the rotation axis of the roll core is inserted into the positioning hole. The resin solution is poured between the outer circumferential surface of the roll core and the inner circumferential surface of the silicone rubber sheet and cured, and then the resin layer fixed to the outer circumference of the roll core is A method for producing a patterned roll, which comprises removing a silicone rubber sheet from a roll.