JPH0348004B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention is for continuously producing products with the same basic surface shape but different widths, such as keraba ornaments and tiles similar thereto, by roll extrusion molding. It is about the method.

BACKGROUND TECHNOLOGY Conventionally, in the case of molding roof tiles such as three-dimensional keraba ornaments that do not have a constant width, a method has been used in which the tiles are pressurized and dehydrated using a press.

Problems to be Solved by the Invention However, the above-mentioned press molding method is intermittent and cannot perform continuous molding, so it has the drawback of extremely poor production efficiency. Moreover, when press-forming tiles such as keraba accessories, a much larger amount of water is used than is normally required to hydrate the cement, so that the mortar composition during pressing can be sufficiently distributed inside the mold. In this case, large amounts of alkaline water must be removed. Since this alkaline water cannot be directly discharged to the outside, it must be neutralized before being discharged, or it must be returned again and used for hydration of cement. It also had the disadvantage of requiring a large amount of expense.

Therefore, in the present invention, the basic shape of the surface is the same,
To provide a molding method that can continuously produce products whose widths are not uniform, especially roof tiles such as keraba ornaments, and which does not require treatment with alkaline water.

Means for Solving the Problems The continuous molding method according to the present invention involves continuously attaching molds for molding products having the same basic surface shape but varying widths to a conveyor that circulates, and placing them in a material hopper. The method is characterized in that the material is transferred to the hopper and extruded into the receiving mold by a different-diameter shaping roll that is shafted in the hopper and driven and rotated to form the material.

Function A mold for molding a product with the same basic surface shape but varying width is continuously attached to a circulating conveyor and transferred into a material hopper. The material is continuously extruded and shaped into the receiving mold using a diameter shaping roll.

EXAMPLE An apparatus for carrying out the method of the invention is schematically illustrated in FIG. Reference numeral 1 is a hopper to which materials for a mortar composition are supplied, which are a mixture of cement, sand, and water in an amount approximately equal to the amount required for hydration of the cement. Reference numeral 2 denotes a conveyor that circulates in the direction of the arrow, and a large number of receiving molds 3 corresponding to lower molds are successively fixed to the upper side of the conveyor. Reference numeral 4 denotes a different diameter forming roll, which functions as an upper mold, so to speak, and is placed in the hopper 1, mounted on a shaft above the receiving mold 3, and driven and rotated in the direction of the arrow. 5 is a forming die which prevents the material from being rolled up by the rotation of the different diameter forming roll 4 and finishes the surface of the molded product. 6 represents an extruded Keraba accessory. Note that 7 indicates a cutter.

Since the above is a general description of the device, the configuration of its main parts and molded products will be specifically explained with reference to FIGS. 2 to 7.

Keraba accessory 6 extruded by the above device
is shown in Figure 2. As is clear from figures a to e, the widths of the A side end face and the B side end face are W ₁ and W ₂
(W ₁ > W ₂ ), and their heights are L ₁ and L ₂ (L ₁ >, L ₂ ), but the shapes of both end faces are similar, and the basic shape of the surface is It's the same.

The receiving mold 3 is shown in FIG. As is clear from the figures a to c, the shape corresponding to the lower mold of the receiving mold 3 is the same as the shape of the verge accessory 6, and the width changes continuously from the A end to the B end. The broken line represents the virtual surface of the verge accessory 6. The surface of the verge accessory 6 molded in this way is formed by the receiving mold 3 at the A end and the B end.
It will touch edges X and Y of.

The different diameter shaping roll 4 is shown in FIG. The curved shape of the cross section of the roll functioning as the upper mold has the same dimensions as the surface of the A-side end surface of the verge accessory 6 (see FIG. 6a).

Further, the forming die 5 is shown in FIG. The tunnel passage has the same height, and its curved surface shape has the same dimensions as the surface of the A-side end surface of the verge accessory (see FIG. 7a).

Next, the manufacturing process of the Keraba accessory 6 according to this embodiment will be explained based on FIG. 1.

The receiving molds 3 which are successively mounted on the rotating conveyor 2 are sequentially transferred into the material hopper 1 from the left side. On the other hand, the mortar composition of the material was extruded and formed onto the receiving mold 3 by a different diameter forming roll 4 which was mounted on the shaft in the hopper 1 and driven to rotate, and then the surface was finished through a forming die 5 located in the immediate vicinity of the molding die 3. It is sequentially cut by a rear cutter 7 and transferred to a drying process (not shown) to continuously produce the keraba accessories 6 as a product.

In addition, in this example, the continuous molding of the verge accessory was explained, but the continuous molding method of the present invention
It can be widely applied to continuous molding of articles whose basic surface shape is the same but whose width is not uniform.

Effects of the Invention As understood from the above explanation, according to the molding method according to the present invention, the basic shape of the surface is the same,
Since it has become possible to continuously extrude products whose widths are not uniform, productivity can be dramatically increased compared to the conventional method of pressure dehydration using a press and intermittently molding. In addition, it has the advantage that it is not necessary to treat alkaline water that is generated when press-molding products made from mortar compositions, and a large amount of costs can be saved.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and Fig. 1 is a schematic diagram of an apparatus for carrying out the continuous molding method according to the present invention, Fig. 2 is an explanatory diagram of a verge accessory, and Fig. a is a perspective view. Figures b and c are end views of each of A and B, d is a drawing in which both end faces of A and B are overlapped and the end face of B is shown as a shaded area, and e is a side view.
Figure 3 is an explanatory diagram of the receiving mold; figure a is a perspective view, figure b is a drawing in which parts A and B are superimposed and the broken line represents the virtual surface of the verge accessory, and figure c is a side view. are shown respectively. Figure 4 is an explanatory diagram of a different diameter forming roll.
Figure a shows a perspective view, and figure b shows a longitudinal sectional view. The fifth is an explanatory diagram of the forming die, and the figure a
1 shows a perspective view, FIG. 1B shows a side view, and FIG. 1C shows a front view. Figure 6 shows the state in which material is extruded into a receiving mold using different diameter forming rolls.
Figure a shows a state in which the A end face portion of the receiving mold is below the roll, and the shaded area indicates the material. Figure b is a diagram showing a state in which the B end face portion of the receiving mold is below the roll, and the shaded area indicates the material. Figure 7 shows the state in which the surface of the verge part is being finished using a forming die, and Figure a shows the drawing where the A end face part of the receiving mold is inside the forming die, and the shaded area is where the surface is finished. Represents a keraba role item. Figure b is a drawing in which the B end face portion of the receiving mold is inside the forming die, and the shaded area represents the vertex accessory to be surface-finished. 1...Material hopper, 2...Conveyor, 3...
Receiving mold, 4... Different diameter shaping roll.

Claims (1)

[Claims] 1 The basic shape of the surface is the same, but the width is not uniform, and the receiving mold for molding the product is continuously attached to a circulating conveyor and transferred into the material hopper, and a shaft of different diameters is suspended in the hopper and driven and rotated. A continuous molding method characterized by extruding and molding the material into the receiving mold using a shaping roll.