JPH0653363B2 - Cement roof tile manufacturing method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for producing a cement roof tile having an appearance such that a plurality of roof tiles are connected together.

[Background Art] Cement roof tiles are manufactured, for example, as shown in FIG. In FIG. 8, 12 is a conveyor,
Supply device 1 for cement molding material 4 on the upper side of conveyor 12
3 is provided. The supply device 13 is formed by a hopper 14 and a feed roll 15. In this one, while the flat lower mold plate 16 is sequentially fed by the conveyor 12, the cement molding material 4 in the hopper 14 is fed onto the lower mold plate 16 by the feed roll 15 at a constant thickness, and the lower mold plate 16 is fed. The cement molding material 4 supplied to the cement molding plate 17 is cut at the boundary of the lower template 16
Then, the cement molded plate 17 is cured and hardened, and at the same time, subjected to a coating treatment or the like to be finished as a cement roof tile.

Here, as the cement roof tile A, a stepped tile as shown in FIG. 5 is provided. In this structure, a plurality of inclined surfaces 19 are connected to each other via a step surface 18 and are formed on the upper surface thereof. Each inclined surface 19 via the step surface 18 has the appearance of an individual roof tile B, and a plurality of roof tiles are formed. It has an appearance that is continuous. Since this cement tile A has an appearance in which a plurality of tiles are lined up, as shown in FIG. 6, by laying a few cement tiles A on the base plate 20 of the roof,
It has the appearance that a large number of roof tiles are lined up on the roof, and it has the advantage that the number of roof construction steps can be greatly reduced compared to the case where a large number of individual roof tiles are roofed. .

In the case of manufacturing such a stepped cement tile A, it is necessary to shape the step surface 18 and the inclined surface 19 into the cement molding material 4, and heretofore, the cement molding material 4 is conventionally formed as shown in FIG. After molding the cement molding board 17 from
The step surface 18 and the inclined surface 19 are shaped on the upper surface of the cement molding plate 17 by pressing, which requires two steps of molding the cement molding material 4 and molding. There was a problem with the above.

[Object of the Invention] The present invention has been made in view of the above points, and is a cement roof tile that can perform molding and shaping at the same time and can manufacture a stepped cement roof tile with high productivity. It is an object of the present invention to provide a manufacturing method of.

DISCLOSURE OF THE INVENTION However, the method for manufacturing a cement roof tile according to the present invention includes a lower mold 1
A plurality of inclined surfaces 2 that are inclined from one end side to the other end side are formed on the upper surface of the lower mold 1 through a substantially vertical step surface 3, and the lower mold 1 is moved while moving the lower mold 1 in the direction in which the inclined surfaces 2 are connected. The cement molding material 4 is supplied to the upper surface, the lower mold 1 is passed under the molding roll 5, and the molding roll 5 presses the cement molding material 4 on the lower mold 1. In order to achieve the above object, the cement molding material 4 can be molded while being shaped by the lower mold 1 provided with the inclined surface 2 and the step surface 3 and the molding roll 5, and the present invention will be embodied below. This will be described in detail with an example.

As shown in FIG. 3 (a), the lower mold 1 is provided with a molding recess 7 whose upper surface is open.
A plurality of inclined surfaces 2 and step surfaces 3 are formed on the bottom surface of the. Each inclined surface 2 is provided so as to incline obliquely upward from one end side of the lower mold 1 to the other end side, and the adjacent inclined surfaces 2
Is provided with a step surface 3 having a substantially vertical surface, and the inclined surfaces 2, 2 ... Are formed so as to be continuous from one end portion of the lower mold 1 to the other end portion through the step surface 3. Has been done. Moreover, the inclined surface 2 is formed to have a curved surface that follows the curved surface of the surface of the flat roof tile of the Japanese roof tile. The molding recess 7 is an inclined surface 2,2 ...
Are open at both ends in the direction in which the lines are connected.

FIG. 1 shows an apparatus for cement molding, in which a molding roll 5 is rotatably driven by a rotary shaft 23 above a conveyor 12 formed by suspending an infinite belt 22 between drive rolls 21 and 21. It is set up. The forming roll 5 is arranged horizontally with its rotating shaft 23 orthogonal to the traveling direction of the conveyor 12. And conveyor 1
The lower mold 1 is sequentially supplied onto the upper part 2 and is moved by the conveyor 12. The lower mold 1 is supplied to the conveyor 12 so as to move in a direction parallel to the direction in which the inclined surfaces 2, 2 ... Connect, and each lower mold 1 supplied to the conveyor 12 has the same shape. Is provided with a sloped surface 2 and a stepped surface 3, and each of the lower molds 1, 1 ... Is supplied onto the conveyor 12 in a state in which the end surfaces are in contact with each other so that the openings at the side ends of the molding recess 7 match. The state is moved by the conveyor 12.

In this molding apparatus, the cement molding material 4 prepared by kneading cement, aggregate, methyl cellulose (MC), asbestos and the like with water is extruded in a strip shape from the extrusion molding machine 24,
This is supplied to the lower mold 1 on the conveyor 12. The cement molding material 4 is supplied while being drawn into the molding recess 7 of the lower mold 1. The lower mold 1 thus supplied with the cement molding material 4 is moved by the conveyor 12 and passed under the molding roll 5. When the lower mold 1 passes under the molding roll 5, the cement molding material 4 is pressed by the molding roll 5 as shown in FIG. 2, and the cement molding material is pressed by the inclined surface 2 and the step surface 3 of the lower mold 1. Since the lower surface of 4 is shaped while being shaped, the cement molding material 4 can be shaped in steps and simultaneously shaped.

The cement molding material 4 thus molded on the lower mold 1 is sent together with the lower mold 1 by the conveyor 12 and cut along the boundary line of the lower mold 1 by a cutter or the like to form the cement molding plate 17. This cement molding plate 17 undergoes a curing process and a painting process, and then, as shown in FIG.
A plurality of inclined surfaces 19 are formed on the surface through
Each sloping surface 19 is finished as a stepped cement tile A having the appearance of an individual tile B. Cement molding board 1
7 can be sent to the curing step while being held on the lower mold 1.

FIG. 4 shows another embodiment of the present invention, and FIG.
As shown in Fig. 4, the shape along the generatrix of the outer peripheral surface of the forming roll 5 is formed into a curved shape along the curved surface of the inclined surface 2 of the lower mold 1, and as shown in Fig. 4 (b), The cross-sectional shape of the outer peripheral surface perpendicular to the rotation axis 23 of No. 5 is a curve having a gradually increasing radius of curvature and is provided with a projecting surface 25 projecting outward at one place. The average length of the outer circumference of the forming roll 5 is set to be equal to the length between the cross sections 3 of the inclined surface 2. In the above-mentioned embodiment, the cement roof tile A whose back side is flat is molded, but when molding is performed using the molding roll 5 thus formed,
The inclined surface 19 and step surface 1 on the lower surface as shown in FIG.
It is possible to form a stepped surface shape similar to the stepped shape of 8 and. In the above-mentioned embodiment, the lower mold 1 is sequentially and continuously supplied onto the conveyor 12. However, the lower mold 1 can be integrally attached to the belt 22 of the conveyor 12 and used, and the belt 22 is further provided with an inclined surface. 2 and step 3
It is also possible to form the lower mold 1 by providing the belt 22 itself.

[Effects of the Invention] As described above, in the present invention, a plurality of inclined surfaces inclined from one end side to the other end side are formed continuously on the upper surface of the lower mold, and the inclined surfaces are formed. While moving the lower mold in the direction in which they are connected, supply the cement molding material to the upper surface of the lower mold, pass this lower mold below the molding roll, and press the cement molding material on the lower mold with the molding roll. Therefore, when the lower mold passes the lower side of the molding roll, the cement molding material supplied to the lower mold is pressed by the molding roll, and the inclined surface and the step surface of the lower mold cause the cement molding material to have an inclined surface. It is possible to mold while molding the step surface, and at the same time molding the cement molding material, it is possible to mold stepped cement roof tiles with the appearance that multiple roof tiles are integrally provided with high productivity. It can be manufactured.

[Brief description of drawings]

FIG. 1 is a front view showing an apparatus used in one embodiment of the present invention,
Fig. 2 is an enlarged cross-sectional view showing the state of shaping and molding of the cement molding material of the same as above, and Figs. 3 (a) and (b) are enlarged perspective views and enlarged cross-sectional views of the lower mold used in the same as Fig. 4 ( a) and (b) are enlarged sectional views and enlarged front sectional views showing the state of shaping and molding of a cement molding material in another embodiment of the present invention, and FIG. 5 is an enlarged perspective view of a stepped cement tile, FIG. 6 is a sectional view showing a construction state of a stepped cement tile, FIG. 7 is an enlarged perspective view of the cement tile obtained by the embodiment of FIG. 4, and FIG. 8 is a front sectional view showing a conventional example. 1 is a lower mold, 2 is an inclined surface, 3 is a step surface, 4 is a cement molding material, and 5 is a molding roll.

Claims (1)

[Claims] 1. An upper surface of a lower die is formed with a plurality of inclined surfaces inclined from one end side to the other end side through a substantially vertical step surface, and the lower die is moved while the lower die is moved in the direction in which the inclined surfaces are connected. A method for producing a cement roof tile, comprising supplying a cement molding material to the upper surface of a mold, allowing the lower mold to pass under a molding roll, and pressing the cement molding material on the lower mold with the molding roll.