JPH0729288B2 - Cement roof tile manufacturing method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for producing cement roof tiles such as corrugations.

[Background Art] Cement roof tiles are manufactured, for example, as shown in FIG. In FIG. 7, reference numeral 12 is a conveyor, and a feeder 13 for the cement molding material 9 is arranged above the conveyor 12. This feeding device 13 has a hopper 14 and a feed roll.
It is formed by 15 and. In this case, the cement molding material 9 in the hopper 14 is fed to the lower mold plate 16 by the feed roll 15 at a constant thickness while sequentially feeding the lower mold plate 16 of the flat plate by the conveyor 12. The cement molding material 9 supplied in the form of a plate is cut at the boundary of the lower mold plate 16 to form a cement molding plate 17, and the cement molding plate 17 is cured and cured, and is subjected to a coating treatment or the like to be finished as a cement roof tile. is there.

Here, a corrugated cement roof tile A as shown in FIG. 6 is provided as a cement roof tile, but when manufacturing the corrugated cement roof tile A, it is necessary to shape the corrugated cement roof tile A. After molding the cement molding plate 17 from the cement molding material 9 as described above, the cement molding plate 17 is shaped into a corrugated shape by pressing. It required two steps and had a problem in productivity.

[Object of the Invention] The present invention has been made in view of the above points, and provides a method for manufacturing a cement roof tile, which can perform molding and shaping such as corrugation at the same time and is excellent in productivity. That is the purpose.

DISCLOSURE OF THE INVENTION However, the method for manufacturing a cement roof tile according to the present invention includes a lower mold 1
Forming projections and depressions 4 in which ridges 2 and concave ridges 3 are alternately provided in parallel with each other on the upper surface of the mold, and a concave annular ridge 6 corresponding to the ridges 2 of the lower mold 1 and the lower mold 1 are formed on the outer periphery of the forming roll 5. The ring 7 corresponding to the groove 3 of the
Are formed over the entire circumference to form the molding unevenness 8,
The cement molding material 9 is supplied to the upper surface of the lower mold 1 while moving the lower mold 1 in a direction parallel to the longitudinal direction of the ridges 2 and the concave lines 3.
The lower mold 1 is made to pass under the molding roll 5 while the shaping concavities and convexities 4 are opposed to the molding concavo-convex 8 in parallel, and the cement molding material 9 on the lower mold 1 is pressed by the molding roll 5. In order to achieve the above object, the cement molding material 9 can be shaped while being shaped by the lower mold 1 having the shaping irregularities 4 and the forming roll 5 having the shaping irregularities 8. Hereinafter, the present invention will be described in detail with reference to Examples.

As shown in FIG. 3, the lower mold 1 has a molding recess whose upper surface opens.
20 are provided, and a plurality of parallel protruding ridges 2 and concave ridges 3 are alternately provided on the upper surface of the lower mold 1, that is, the bottom surface of the molding recess 20 to form the shaped unevenness 4 having a wavy cross-sectional shape. I have it. The molding recess 20 is open at both longitudinal ends of the protrusion 2 and the recess 3. On the outer peripheral surface of the forming roll 5, a plurality of parallel concave annular ridges 6 and projecting annular ridges 7 are alternately provided to form an uneven ridge 8 having a corrugated cross-sectional shape. The concave ring 6 and the projecting ring 7 are provided over the entire circumference of the outer circumference of the forming roll 5. In the state where the forming roll 5 is arranged on the upper side of the lower mold 1, the protruding ring 2 of the lower mold 1 corresponds to the concave ring 6 and the concave line 3 of the lower mold 1 corresponds to the protruding ring 7. Further, at this time, the shapes of the shaping unevenness 4 and the shaping unevenness 8 are set so that the shaping unevenness 4 of the lower mold 1 and the shaping unevenness 8 of the forming roll 5 are parallel to each other.

FIG. 1 shows a forming apparatus, which is a conveyor 12 formed by suspending an infinite belt 22 between drive rolls 21.
A forming roll 5 is disposed on the upper side of the rotatably driven by a rotating shaft 23. The forming roll 5 is arranged horizontally with its rotation shaft 23 orthogonal to the traveling direction of the conveyor 12. Then, the lower mold 1 is sequentially supplied onto the conveyor 12 and moved by the conveyor 12. The lower mold 1 is supplied on the conveyor 12 so as to be moved in a direction parallel to the longitudinal direction of the ridges 2 and the concave ridges 3. The lower molds 1 supplied on the conveyor 12 have the same shape. The molding recess 20 and the shaping unevenness 4 formed on the lower mold 1 are provided.
1 ... Is supplied onto the conveyor 12 in a state where the end faces are in contact with each other so that the openings at the side ends of the molding recesses 20 match, and is moved by the conveyor 12 in this state.

In this device, a cement molding material 9 prepared by kneading cement, aggregate, methyl cellulose (MC), asbestos, etc. with water is extruded in a strip shape from an extrusion molding machine 24 and supplied to the lower mold 1 on the conveyor 12. To do. Cement molding material 9
Will be supplied while being drawn into the molding recess 20 of the lower mold 1. The lower mold 1 thus supplied with the cement molding material 9 is moved by the conveyor 12 and passes under the molding roll 5. When the lower mold 1 passes under the molding roll 5, the cement molding material 9 is pressed by the molding roll 5 as shown in FIG. The lower surface of the cement molding material 9 is molded while being shaped into a corrugated shape by the shaping unevenness 4, and the upper surface of the cement molding material 9 is shaped by the molding unevenness 8 of the molding roll 5 formed by the concave ring 6 and the projecting ring 7. Will be molded while being shaped into a corrugated shape, and the cement molding material 9
Can be shaped at the same time as having a corrugated cross section.

The cement molding material 9 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 a cement molding plate.
It will be 17. The cement molded plate 17 is finished as a corrugated cement tile A as shown in FIG. 6 through a curing process and a painting process. The cement molded plate 17 can be sent to the curing step while being held on the lower mold 1.

FIG. 4 shows another embodiment of the present invention, in which a molding groove 25 is provided on the surface of the shaping unevenness 4 of the lower mold 1. In this case, the groove 25 for forming allows the hook projection 26 to be formed on the lower surface of the corrugated cement tile A as shown in FIG. It is also possible to form a drainage groove on the lower surface of the corrugated cement roof tile A by providing a protrusion on the surface of the shaped unevenness 4 instead of the molding groove 25. As described above, in the present invention, various projections and grooves can be arbitrarily formed on the lower surface of the corrugated cement roof tile A by setting various shapes of the lower mold 1. Particularly, extrusion of the cement molding material 9 is possible. It is possible to form protrusions and grooves that do not follow the direction. The lower mold 1 can be used by being integrally attached to the belt 22 of the conveyor 12, or the belt 22 itself can be directly provided with the shaping unevenness 4 to form the lower mold 1 by the belt 22 itself. Further, in the above-mentioned embodiment, the method for manufacturing the corrugated cement roof tile A by forming the shaping unevenness 4 and the molding unevenness 8 in a corrugated cross-section, respectively.
The cross-sectional shape of the molding irregularities 8 is not limited to a corrugated shape, and can be set to various shapes.

[Advantages of the Invention] As described above, according to the present invention, shaping ridges are formed on the upper surface of the lower mold, the ridges and the concave ridges being alternately provided in parallel, and the lower mold ridges are formed on the outer periphery of the molding roll. A concave ring strip corresponding to the strip and a projecting ring strip corresponding to the recess strip of the lower mold are provided over the entire circumference to form molding irregularities, and the lower mold is formed in the direction parallel to the longitudinal direction of the strip or the recess strip. While supplying the cement molding material to the upper surface of the lower mold, the lower mold is passed through the lower side of the molding roll to press the cement molding material on the lower mold with the molding roll. The cement molding material supplied to the lower mold when passing through the lower side of the molding roll is pressed by the molding roll, and the lower surface of the cement molding material is formed by the shaping irregularities of the lower mold formed by the ridges and the ridges. It is possible to shape while forming and to form a forming roll formed by a concave ring and a protruding ring. It is possible to mold while molding the upper surface of the cement molding material by the shape irregularity, and it is possible to mold the cement molding material and mold at the same time, and it is possible to manufacture the cement roof tile with high productivity. Also,
The upper surface of the cement molding material can be molded while shaping it with one molding roll, and the molding of the upper surface can be performed with only one molding roll, and the configuration of the device becomes simple, Moreover, it is possible to mold the cement molding material with a constant thickness between the molding irregularities of the molding roll and the shaping irregularities of the lower mold that are opposed to each other in parallel, in spite of simplifying the configuration of the apparatus in this way, It is possible to obtain a cement roof tile with less warp by molding a cement molding material with a constant thickness.

[Brief description of drawings]

FIG. 1 is a front view showing an apparatus used in one embodiment of the present invention,
FIG. 2 is a sectional view showing the state of shaping and molding of the cement molding material of the above, FIG. 3 is an enlarged perspective view of a lower mold used in the same,
FIG. 4 is a sectional view showing a state of shaping and molding of a cement molding material in another embodiment of the present invention, FIG. 5 is an enlarged side view of a cement roof tile obtained by the same embodiment, and FIG. 6 is a cement roof tile. FIG. 7 is an enlarged perspective view of FIG. 7, and FIG. 7 is a front sectional view showing a conventional example. DESCRIPTION OF SYMBOLS 1 is a lower mold, 2 is a protrusion, 3 is a concave line, 4 is a shaping unevenness, 5 is a forming roll, 6 is a concave ring, 7 is a projecting ring, 8 is a forming unevenness, 9
Is a cement molding material.

Claims (1)

[Claims] Claims: 1. Forming unevenness in which protrusions and recesses are alternately provided in parallel with each other on the upper surface of the lower die, and a concave ring-shaped strip corresponding to the protrusion of the lower die and the lower die are formed on the outer periphery of the forming roll. Forming concavo-convex shape by providing projecting ring strips corresponding to the recessed strips around the entire circumference, and cement molding on the upper surface of the lower die while moving the lower die in the direction parallel to the longitudinal direction of the projecting strips or the recessed strips. A cement characterized by supplying a material and pressing the cement molding material on the lower mold with the molding roll by passing the lower mold through the lower side of the molding roll while facing the molding unevenness in parallel with the shaping unevenness. Roof tile manufacturing method.