JPS6039526B2 - Continuous molding method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for continuously molding a material such as a mortar composition, and more specifically, a recess 3a of a movable lower mold 2 having a molding surface 1 on the upper surface and a preforming roll 4. Taigetsu Ryōbu 5
The material is rolled up between the troughs 6a of the molded product, and then the material is rolled up between the convex part 3b of the lower mold 2 and the small part 8a of the finishing roll 7 to form the molded product. This relates to a continuous molding method characterized by compression molding the peak portion 6b.

Conventionally, a method using a press has been used to form a mortar composition made of a mixture of cement, sand, and water.

However, a press method was used. However, since press molding is not a continuous molding method, it has the drawback of extremely low productivity. Moreover, in the pressing method, a large amount of water, which is greater than the amount of water required for hydration of the cement, is mixed in order to improve the material's surroundings during pressing, resulting in a large amount of alkaline drainage during pressing. Since this alkaline wastewater cannot be flushed outside as it is, this alkaline wastewater cannot be flushed outside as it is, so either should this alkaline wastewater be neutralized before being drained, or should this alkaline wastewater be reused? This also had the disadvantage of requiring a large amount of money. In view of this, the inventors of the present invention developed an apparatus that allows continuous production and does not generate alkaline waste water by rolling up the material in the hopper 9 between the lower die 2 and the forming roll 7', as shown in FIG. I devised a continuous molding method,
This method inevitably has the problem that the troughs of the molded product molded in the recesses 3a of the lower die 2 are not tightly packed and uneven compression occurs.

That is, by setting the baffle plate 10 facing the bet-shaped roll 7' a little higher than the lower surface of the forming roll 7', it is possible to uniformly wind the material onto the forming roll 7', but in this case, as shown in FIG. If the roof tile 11 has a trough 6a or a convex portion on the back surface, no compressive force is applied to that portion, making it impossible to obtain a uniformly compressed molded product. The reason for this is the 8th
As shown in the figure, in the case of an integral forming roll 7', in order to equalize the amount of material rolled into each part, the large part 8 of the forming roll 7'
The part b' is masked more with the baffle plate 10, and the small rear part 8a' is molded almost without a mask. This is because, in the case of the large diameter portion 80, as shown in FIG. 8b, the compression force is quite lateral and the force does not directly reach the concave portion 3a of the lower mold 2, resulting in no compressed material. The present invention has been made in view of the above points, and its purpose is to provide a continuous molding method that enables continuous production, does not generate alkaline drainage, and can compress the entire product evenly.

The present invention will be explained in detail below with reference to the accompanying drawings.

Although any molded product made of a mortar composition made of a mixture of cement, sand, and water may be used, here, the molded product will be explained using a roof tile 11 as shown in FIGS. 7a and 7b as an example. . What is shown in FIG. 1 is an overall view of the device.
The lower mold 2 is fixed on the chain conveyor 12, and the lower mold 2
A finishing forming roll 7 is provided at the rear of the hopper 9 for supplying materials above, a baffle plate 10 is placed in front of the finishing forming roll 7, and a preliminary forming roll is placed in front of the finishing rising roll 7 in the hopper 9. A roll 4 is provided, and a forming roller 1-13 is arranged behind the finishing-forming roll 7. As shown in FIG. 2, the lower mold 2 has a molding surface 1 on its upper surface that has the same shape as the lower surface of the tile 11, and the chain conveyor 12 has a large number of lower molds 2 in a row as shown in FIG. The lower die 2 also revolves below the hopper 9 together with the chain conveyor 12 which is fixed to each of the hoppers and driven by a drive machine. The molding surface 1 of the lower mold 2 does not need to have a uniform shape in the moving direction like an extrusion molded product of synthetic resin; for example, in the molding surface 1 shown in FIG.
Step portions 15 are formed in the front and rear corresponding to the lower projection 14 of No. 1. The preforming roll 4 has a lower die 2 as shown in FIG.
A large side part 5 is provided opposite to the recess 3a of the lower mold 2, and the preliminary roll 4 is rotatably mounted in the hopper 9 and the thickness of the tile 11 is formed between the main part 5 and the recess 3a of the lower mold 2. The chain conveyor 12 is rotated by a drive motor in a direction synchronized with the traveling direction of the chain conveyor 12, with a gap of the same amount as the chain conveyor. As shown in FIG. 4, the finish-forming roll 7 is an irregularly shaped roll that corresponds to the top surface shape of the tile 11. This finish-forming roll 7 is also rotatably mounted in the hopper 9 and is attached to the lower mold 2. The chain conveyor 12 is rotated by a drive motor in a direction synchronized with the traveling direction of the chain conveyor 12, with a gap equal to the thickness of the roof tile 11 interposed between it and the molding surface 1 of the chain conveyor 12. The diameter of the large rope portion 5 of the preliminary shaping roll 4 is made equal to the diameter of the small portion 8a of the finishing shaping roll 7. As shown in FIG. 5a and b, the baffle plate 1 is disposed along the finish forming roll 7 to face the front of the top forming roll 7, and the maximum diameter portion of the finish forming roll 7 is separated by the baffle plate 10. The lower end of the baffle plate 10 is extended as long as the large cross section 8b of the finish forming roll 7 so that it is completely masked and the smallest light part of the finish forming roll 7 is almost unmasked.
As shown in FIG. 6, the forming die 13 has a lower surface shape equal to the upper surface shape of the tile 11, and the finishing forming roll 7
It is provided so as to be in contact with the finishing forming roll 7 at the rear of the roll. Molding is performed using this device as follows.

A material such as a mortar composition that is a mixture of cement, sand, and water is supplied into the hopper 9, but this material does not contain a lot of water like a general mortar composition.
It is a mixture of cement and sand with slightly more water added than required for hydration of the cement, and is rather in a crumbly state. Since the material is rolled up between the preliminary and finishing forming rolls 47 and the lower mold 2, much water is not required. Chain conveyor 1 flowing from front to back
When the preforming roll 4 rotates in synchronization with the preforming roll 2, the thick body part 5 of the preforming roll 4 and The material is rolled up between the concave portion 33 of the lower mold 2 and compressed, and the compressed valley portion 6a of the tile 11 is first formed. Next, the advancing force of the lower die 2 and the rotational force of the finish forming roll 7 wind the material between the convex portion 3b of the lower die 2 and the small diameter portion 8a of the finish forming roll 7, and the material is rolled up into the finish forming roll. 7 and the lower die 2 compress and mold the material. The reason why the baffle plate 10 is attached here is that the finish forming roll 7 is integrated with the baffle plate 10.
In the case of no 0, more material is caught in the large light portion 8b of the finishing 0 forming roll 7, so the larger the part 8b is, the more the material is covered with the baffle plate 10 to adjust the material to be rolled in equally in each part. That is, since the necessary amount of material is rolled into the recess 3a of the lower mold 2 in advance with the pre-bran forming roll 4, the larger diameter portion 8b of the finishing roll 7 is covered more and the recess of the lower mold 2 is filled with the necessary amount of material. 3a is designed to prevent any more material from being rolled up. Thereafter, the forming machine 13 prevents the material from being rolled up by the rotation of the finish-forming roll 7, and the material is sent as molded tiles 11, cut into unit lengths, and dried and hardened. First, the pre-arm forming roll 4 and the lower die 2 form the valley part 6a of the molded product, and the successor upper forming roll 7 and the lower die 2 form the mountain capital 6b of the molded product. Since the shape is adjusted, both the peaks 6b and the valleys 6a can be sufficiently compressed without any compression defects, and there is no compression unevenness in the molded product.As described above, the present invention provides a movable lower mold having a molding surface on the upper surface. The material is rolled up between the concave part of the mold and the thick body part of the preforming roll to compress the valley part of the molded product, and then the material is rolled up between the convex part of the lower die and the small light part of the finishing roll. Since the peaks of the molded product are compressed by being rolled up, the molded product is rolled up between the lower die and the finishing roll or pre-shaping roll, making continuous production possible. Unlike the press method, the mortar composition does not need to contain a large amount of water, so there is no alkaline drainage, and the valleys and peaks are molded separately, making it easier to compress into a molded product. It has the advantage that no defects occur and there is no compression unevenness in the molded product.

[Brief explanation of the drawing]

Fig. 1 is a side view showing one embodiment of the present invention, Fig. 2 is a perspective view showing a lower mold used in the above, Fig. 3 is a front view showing the preforming roll of the above, and Fig. 4. 5A and 5B are front views and side views showing the finishing forming roll and the baffle plate, FIG. 6 is a perspective view showing the forming die, and FIG. Figures a and b are a perspective view and a side view showing the tile of the molded product, Figures 8a, b and c are side views showing the action of the forming roll, and Figure 9 is a comparative explanatory view with the present invention. 1... Molding surface, 2... Lower mold, 3a... Recessed part of lower mold, 3
b...Convex part of lower mold, 4...Preforming roll, 5...Thick body part, 6a...Trough part of molded product, 6b...crest part of molded product,
7... Finish forming roll, 8a... Small diameter portion of the finishing forming roll. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8

Claims (1)

[Claims] 1. Material is rolled up between the concave part of a movable lower mold having a molding surface on the upper surface and the thick body part of the preforming roll, and the troughs of the molded product are compression-molded, and then the convex parts of the lower mold and finishing A continuous molding method characterized by compressing the peaks of a molded product by rolling the material between it and the small diameter part of a shaping roll.