JPS6030246B2 - Method for manufacturing tiles with projections on the top surface for water return - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for manufacturing a roof tile having projections on the top surface for water return;
More specifically, the present invention relates to a method of adding water return protrusions perpendicular to the extrusion direction of the tile body to the upper surface of the tile body obtained by continuous extrusion.

Generally, when manufacturing tiles from inorganic hardened materials such as cementitious compositions, continuous extrusion molding is employed to speed up the molding cycle, ie, production speed.

Due to the nature of extrusion molding, on the top surface of tiles produced by continuous extrusion molding, protrusions parallel to the extrusion direction can be formed at the same time as extrusion by providing recesses corresponding to the forming rolls. It is not easy to form the ridges, and the conventional method for doing this is to add the material that will become the ridges to the top surface of the extruded tile in a separate process from the extrusion molding process, and then harden it using a press or other method. It was being done. However, with this method, it is necessary to add a new material supply and molding process to the tile molding process, which is continuously formed by extrusion molding, making the process complicated and inevitably slowing down the tile production rate. There was a problem in that the advantages of continuous extrusion molding were lost. Furthermore, when attempting to provide protrusions of uniform height on the top surface of a tile that has an uneven surface, it is difficult to accurately supply a predetermined amount of molding material for the protrusions onto the top surface of the tile. There was a problem in that it was not possible to add protrusions to roof tiles that had.
The present invention has been made in view of the above points, and its main purpose is to provide a water return running in a direction perpendicular to the extrusion direction on the top surface of the tile without impairing the high production speed achieved by continuous extrusion. Another object of the present invention is to provide a method that can easily form ridges for water return, even on roof tiles with uneven surfaces. be.

The present invention will be described in detail below based on embodiments shown in the figures.

The method for manufacturing a roof tile having a water return protrusion on its upper surface according to the present invention includes forming a strip 2 before hardening into a long body by continuous extrusion molding of an inorganic hardening material 1 such as a cement composition. The strip 2 is cut into a plurality of tile bodies 3 arranged in the longitudinal direction while being fed out along the longitudinal direction, and one end of the tile body 3 in the longitudinal direction is cut while conveying the unhardened tile body 3 along the longitudinal direction. The chipped part is ground down all the way through, and the chipped part is collected all over the top surface of the tile body 3, and the uncured inorganic hardened material 4 collected on the top surface of the tile body 3 is press-molded to form the tile body. 3 is characterized by forming a protrusion 5 extending all the way through the upper surface thereof. FIG. 1 shows a longest strip 2 formed by continuous extrusion molding of an inorganic hardening material 1 such as a cementitious composition.
The inorganic hardened material 1 in the hopper 10 is molded into a predetermined cross-sectional shape between the receiving mold 13 and the molding die 14, which are sent onto the conveyor 12 by the molding rolls 11, while being molded forward. Immediately after forming, the band 2 is extruded into a continuous long band 2 along the conveyance direction of the conveyor 12, and the cutter 1 moves up and down in front of the forming die 14.
5 into appropriate dimensions and divided into a plurality of tile bodies 3 arranged along the longitudinal direction. Each tile main body 3 cut to a predetermined size in this manner is placed on a single receiving mold 13, with the front and rear ends facing each other closely, and is conveyed along one side by the conveyor 12. In this way, each tile main body 3 that is sent forward by the receiving mold 13 has one end in the longitudinal direction ground down before it hardens in front of the cutter 15, and this ground down part completely breaks down the tile main body 3. In the embodiment shown in FIGS. 2 and 7, the protrusions 5 are formed on the upper surface of the tile main body 3 by cutting down the rear end of each tile main body 3 in the direction of movement. The example shown in FIG. 8 shows an example in which the front end of each tile main body 3 in the advancing direction is ground down to form the protrusion 5. In Figure 2, 1
Reference numeral 6 denotes a ridge forming device, and the ridge forming device includes a scratching blade 17 for scraping down the upper rear end of the tile main body 3, and a part of the tile main body 3 that has been scraped off between the scratching blade 17 and the ridge forming device. The stop plate 18 held on the upper surface of the rear end of the tile main body 3, the scratching blade 17 and the stop plate 18
and a press die 19 for pressurizing the material 4 between them onto the upper surface of the tile main body 3. This ridge forming device 16 moves horizontally along the direction of movement of the tile main body 3 in synchronization with the conveyor 12, and also moves up and down.
This will be explained with reference to the figures. Initially, the entire device 16 is
It is located above and descends while horizontally moving in the direction of movement of the tile body 3 (arrow A) at the same speed as the feed speed of the tile body 3,
As shown in Fig. 2a, the lower end of the scratching blade 17 is
The gap 201 between them is made to protrude, and the lower end of the stop plate 18 is brought into contact with the upper surface of the tile body 3, and then the entire device 16 is horizontally moved forward at a speed faster than the feeding speed of the tile body 3,
The upper part of the rear end of the tile body 3 is scraped down with the lower end of the scratching blade 17, and as shown in FIG. 18, then return the entire device 16 to the same speed as the feeding speed of the tile main body 3, and then move only the press die 19 downward between the scratching blade 17 and the stop plate 18. As shown in FIG. At the same time as the tile body 3 retreats upward, it quickly moves in the direction opposite to the advancing direction of the tile body 3 (arrow B) and returns to its original position, and in preparation for forming the protrusion 5 on the next tile body 3, the above operations are performed one after another. By repeating this process, the protrusions 5 are created on the upper surface of each tile main body 3 that is sequentially fed by the receiving die 13. The lower ends of the scratching blade 17, stop plate 18, and press die 19 are shaped to match the surface shape of the tile main body 3 formed between the forming die 11 and the receiving die 13, respectively, as shown in FIG. When forming protrusions 5 on a tile main body 3 with a flat surface as shown in FIG.
As shown in the figure, when the protrusions 5 are formed on the tile main body 3 which is formed into a wave shape and has peaks and valleys lined up in the middle direction of the surface, the protrusions 5 are shaped to match the surface shape of the tile main body 3 in the middle direction. are used. In this way, according to the method of the present invention, the tile main body 3
The protrusions can be formed in a direction perpendicular to the extrusion direction, and even if the surface shape provided during extrusion is uneven, it is possible to create protrusions with accurate dimensions that match the surface shape. In the embodiment shown in FIG. 7, a protrusion forming device 20 extrudes the material 4 forward with an extrusion press die 21 that extrudes it forward while scraping the upper surface of the rear end of each tile main body 3. It is composed of a receiving die 22 for compression between the two. The extrusion press mold 21 is driven horizontally and vertically by a air cylinder 23 in synchronization with the conveyor 12, and the receiving die 22 is driven vertically. , the extrusion press mold 21 descends together with the air cylinder 23,
After the protrusion 24 protruding from the lower end of the extrusion press mold 21 protrudes between the tile main bodies 3 and the legs 25 protruding from the front end of the lower surface of the receiving die 22 contact the upper surface of the tile main body 3, as shown in FIG. The extrusion press mold 21 moves forward faster than the feeding speed of the tile body 3 and compresses the material 4 which has been scraped off the upper rear end of the tile body 3 between the upper surface of the tile body 3 and the leg 25 of the receiving die 22. A protrusion 5 is formed on the upper surface of the tile main body 3, and the protrusion 5 extends all the way through.
After forming the ridge 5, as shown in FIG. Prepare for molding. Incidentally, a draft angle is provided on the front surface of the extrusion punch mold 21 and the rear surface of the leg 25 of the receiving die 22 to facilitate separation from the protrusion 5 after forming the protrusion 5.
In the embodiment shown in FIG. 8, the protrusion forming apparatus 3 has a scratching blade 31 and a press die 32, which move up and down in a fixed position, and is driven up and down by air cylinders 34 and 35, respectively. The twill blades 31 are first lowered to project their lower ends into the gaps between the tile bodies 3, and as the tile bodies 3 are sent forward,
The front end of the tile main body 3 is scraped off, the scraped material 4 is brought to the upper surface of the tile main body 3, and then moved upward in synchronization with the feeding of the tile main body 3. The material 4 is scraped onto the upper surface of the front end portion, and the material 4 scraped onto the upper surface of the tile main body 3 is scraped onto the upper surface of the tile main body 3 by the press metal 32 disposed in front of the scraping blade 31 descending to the upper surface of the tile main body 3. The ridge 5 is molded into a predetermined shape and extends throughout the tile main body 3 and is integrally connected to the tile main body 3. This press mold 32
The tile main body 3 is also moved up and down repeatedly in synchronization with the feeding of the tile main body 3, and a protrusion 5 is added to each of the tile main bodies 3 that are fed one after another.
In addition, as the driving means of the protrusion forming apparatus in each of the above embodiments, in addition to the air cylinder, a driving means such as a cam drive is used. In addition, as the inorganic hardening material, in each of the above examples, 10 parts by weight of Boltland cement, 3 parts by weight of river sand,
A cement-based composition consisting of 0 parts by weight and 4 parts by weight of water was used, and roof tiles with ridges on the top surface could be formed at a production rate of one piece per 0.5 to 1.9 stages. . This greatly improves the production rate of one piece every 4 to 5 seconds, which is the production rate when forming the protrusions by separately supplying the material for the protrusions to the roof tile using the conventional method. As for the product itself, results were obtained in which the protrusions of the roof tile according to the present invention had improved dimensional accuracy compared to those of the subordinate tiles. As described above, the present invention scrapes one end of the tile body in the feeding direction while conveying the tile body before hardening, collects the scraped material on the top surface of the tile body, and transfers this material to the top surface of the tile body. Since the ridges for water return are formed all the way on the upper surface of the tile body by pressing, there is no need to supply a separate material to the tile body, which is formed by continuous extrusion, as in the case of a secondary tile. Protrusions can be created by moving a part of the tile body, and roof tiles with protrusions on the top surface can be manufactured without reducing the feed speed of the tile body on the conveyor line of the tile body by continuous extrusion. Not only can this be done, but the edge of the tile body is scraped all the way through perpendicular to the feeding direction and collected on the top surface of the tile body, so it is easy to scrape along the direction perpendicular to the extrusion direction of the tile body. It has the advantage that the protrusions can be formed.

[Brief explanation of the drawing]

Fig. 1 is a schematic sectional view showing the process of forming the tile main body from the inorganic hardened material in the present invention, Fig. 2 a, b, and c are enlarged sectional views showing the process of forming the protrusion in the present invention, and Fig. 3
4 is a side view of the tile shown in FIG. 3, and FIG. 5 is a perspective view showing another example of the tile obtained by the present invention. Figure 6 is a side view of the tile shown in Figure 5, Figures 7a, b, and c are enlarged cross-sectional views showing the forming process of the protrusions in another embodiment of the method of the present invention, and Figure 8 is a side view of the tile shown in Figure 5. It is a schematic cross-sectional view showing the forming process of a protrusion in yet another example, in which 1 is an inorganic hardened material, 2 is a band, 3 is a tile main body, 4 is a scraped material, and 5 is a protrusion. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8

Claims (1)

[Claims] 1. A pre-cured strip formed into a long body by continuous extrusion molding of an inorganic curable material is fed along the longitudinal direction, and the strip is cut into a plurality of tile bodies arranged in the longitudinal direction, and the pre-cured tile body is cut into a plurality of tile bodies. While transporting the tile in the longitudinal direction, one end in the longitudinal direction of the tile body is ground down over the entire width, and the broken part is collected over the entire width on the top surface of the tile body. 1. A method for manufacturing a tile having a ridge for water return on its upper surface, the method comprising press-molding an inorganic hardened material before hardening to form a ridge extending over the entire width at one place on the upper surface of the tile main body.