JPH0123288B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Field of Application> The present invention relates to a method for metering and molding instant demolding product concrete.

<Prior art> A movable hopper that slides back and forth on the upper surface of the formwork is placed below the stationary hopper to receive the supply of concrete, and the movable hopper is advanced to the upper surface of the formwork to drop and fill it into the formwork. When retreating, the remaining concrete on the top of the formwork is flattened along the top edge of the formwork and returned to the movable hopper, returning directly below the stationary hopper, where it is supplied with concrete to be filled into the next formwork. There is.

<Problems to be Solved by the Invention> This method of filling the formwork using a movable hopper using a box-cutting method has problems when the hopper retreats from the top of the formwork, depending on the mix of concrete, the particle size of the aggregate used, and the shape of the product. As a result, the concrete on the top of the form is drawn to the rear, making the surface layer of the top of the form uneven, making the material thinner at the front and thicker at the back.

However, with conventional products that are relatively thick, it is possible to correct the pressure in the vibration and press processes, but when making extremely thin products, the concrete is pulled in too much when the hopper retreats, making it uncompressible. Since it is not possible to correct the voids in dry and dry concrete by vibration and pressing alone, in order to equalize the surface layer, the insufficient concrete must be manually supplied using a shovel each time, or the hopper must be moved forward again. was used to supply the air to the void.

However, manual work requires skill and is dangerous, and it is difficult to completely equalize the surface layer even if it is advanced again, so forming thin products by immediate demolding is inappropriate, and most rely on the casting method. -ing

In addition, in recent years, in order to reduce the weight and increase the strength of concrete products, composite concrete has been used, such as by using concrete mixed with various fibers and resins to reduce the thickness, or by coating ordinary concrete and laminating it. As the viscosity of concrete increases, it becomes difficult to uniformly supply the material into the formwork using the conventional method of meter cutting, which has had a major negative impact on the development of instant demolding for composite concrete.

<Means for Solving the Problems> This invention measures an amount of concrete in advance according to the shape of the product to be formed and supplies it to a movable hopper, and when the movable hopper is advanced to feed the weighed concrete. The product receiving pallet inside the formwork is kept in a standby position approximately horizontal to the top surface of the formwork.
When the movable hopper reaches directly above the formwork opening, the product receiving pallet is gradually lowered while applying vibration to ensure that the concrete in the movable hopper is evenly filled into the formwork. The feeding width in the advancing direction is made extremely small so that when the concrete reaches the front of the formwork, it is fed into the formwork with an even thickness and the surface layer is approximately horizontal.

This makes the concrete density within the formwork even, so there is no need to correct the unevenness of the thickness by pressing or vibration, making it easy to quickly demold even thin products made of dry concrete with no fluidity or highly viscous concrete. I made it.

After supplying the first layer of concrete, the product receiving pallet that is waiting in the middle of the formwork is lowered to create a space above the formwork, and a pre-measured amount of different material is supplied, vibrated and pressurized. By forming, it also became possible to form laminated concrete products.

<Operation> Pour concrete weighed for the shape of the product into the movable hopper so that it has an even thickness, move it forward to the opening of the formwork, and when the front plate of the hopper reaches the front side of the formwork, it will almost reach the top surface inside the formwork. When the product-receiving pallet that is waiting at the pallet is gradually lowered while being vibrated, the entire amount of concrete in the moving hopper is evenly dropped and filled into the formwork as the pallet descends. In addition, by lowering the product receiving pallet as soon as the moving hopper starts moving forward and feeding the material until it reaches the front side of the formwork, the material is weighed and there is no excess material when the moving hopper retreats, so there is no excess material in the formwork. The concrete in the form has settled below the top surface of the form, and returns to its original position at the lower edge of the front plate of the hopper without scraping off the remaining concrete, so the concrete inside the form is kept at a uniform thickness, so it is not affected by pressurized vibration. A concrete product with uniform density is formed.

<Example> 1 is a stationary hopper, 4 is a movable hopper that reciprocates on the formwork, and 5 is the formwork.

6 is a product receiving pallet, 13 is a press plate, and FIGS. 1 to 6 are explanatory diagrams showing the operating steps of an embodiment of the present invention.

Next, an example of main molding according to the present invention will be described.

Here, the term "concrete" includes composite concrete mixed with mortar, resin, or various fibers.

When the shutter 8 of the stationary hopper 1 shown in Fig. 1 is opened and concrete equivalent to the volumetrically measured amount of one load is supplied to the conveyor built under the hopper 1, the supplied concrete is automatically Since the conveyor 2 is equipped with a measuring device for totalizing, the concrete weight corresponding to the shape of the product is weighed and introduced each time in accordance with the forming process.

In order to evenly supply the weighed concrete into the moving hopper, the cylinder 7 of the moving hopper is moved from the fixed position, and the moving hopper is moved backwards and forwards while repeatedly supplying the weighed concrete on the belt conveyor 2, and then the moving hopper is moved back and forth. The tips of the vibrator 15 and scraper 9 are stretched to level the concrete in the movable hopper 4 to a uniform thickness.

Therefore, as shown in FIG. 2, a product receiving pallet 6 is placed in the formwork 5, supported by demolding rods 12 at approximately the same height as the top surface of the formwork 5, and a moving hopper 4 is placed on the top surface of the formwork. When the hopper 4 moves forward and reaches a position directly above the upper opening 5' of the formwork, the product receiving pallet 6 is gradually lowered while starting the formwork vibrator 11, and the weighed concrete in the moving hopper is moved down the pallet. It moves into the mold and fills the space formed by the mold with a substantially uniform thickness.

When retracting the hopper, please use the hopper 4 as shown in Figure 4.
The entire amount of concrete inside has been fed into the formwork and is slightly sunken below the top of the formwork, so the front plate 4' of the hopper 4
Since the concrete at the top of the formwork is not pulled back or scraped, the concrete inside the formwork can maintain approximately the same density.

In this way, since the concrete within the formwork is not moved or scraped, the upper surface of the concrete within the formwork is filled approximately horizontally.
Therefore, since there is no need to replenish concrete into the recess, the upper surface can be immediately finished by press vibration forming as shown in FIG.

This eliminates the need for a molded finish with uneven voids and provides a high-quality finished surface with a constant density at the regular product dimensions, making it possible to easily mold even relatively thin products.

Figures 7 to 9 are examples in which decorative colored mortar is layered on top of the first layer of concrete that has been weighed in, and the material is weighed and fed in advance after the first layer of concrete is pressed. The surface layer hopper 10 is moved to the upper opening 5' of the mold.

In this case, when the surface layer hopper 10 reaches directly above the upper surface of the formwork, the product receiving pallet waiting at the pressed position of the first layer is gradually lowered while vibrating in the same manner as when filling the first layer. The decorative color mortar M in the hopper is filled into the void above the formwork.

After the material feeding is completed, the surface layer hopper is retreated, the press device is moved differentially as shown in Fig. 5, press vibration finishing is performed, and the product receiving pallet 6 is raised by the demolding rod 12 to remove the molded product upward. Make a mold.

In this way, in order to create a void corresponding to the amount to be filled on the top of the formwork, the product receiving pallet is placed on standby in a predetermined position within the formwork, and the void is filled with concrete of different mixes and laminated, so a thin layer is created. However, when the movable hopper retreats, there is no concrete in the movable hopper, so the concrete in the formwork does not move with it or be scraped off, making it possible to form layers of uniform thickness.

Fig. 10 shows an example in which the charging width of the moving hopper is extremely small.Since the charging opening 17 is small, the product receiving pallet 6 is lowered at the same time as the hopper moves forward, and the concrete weighed in the moving hopper is poured in by the time it moves back. The material is supplied evenly within the formwork.

In such cases, the forward and backward speeds of the moving hopper can be freely changed depending on the descending speed of the product receiving pallet, so the speed can be selected as appropriate depending on the nature of the material to be fed and the shape of the product. It is easy to laminate multiple thin layers of concrete.

<Effects of the Invention> This invention stores pre-measured concrete in a movable hopper, and drops and fills the gap at the top of the formwork formed by lowering the product receiving pallet, so that when the movable hopper retreats, Prevents the filling concrete in the formwork from being scraped, thereby obtaining a layer of uniform density without creating thick and thin layers in parts of the formwork,
This made it possible to immediately demold and mold thin products using non-flowable, incompressible hardened concrete.

It has also become easier to layer and mold high-value-added composite concrete mixed with various resins and fibers through immediate demolding.

[Brief explanation of drawings]

Fig. 1 is a partially longitudinal front view for explaining the molding method of the present invention, Figs. 2 to 6 are explanatory diagrams showing examples thereof, and Figs. 7 to 9 show the laminated molding method. Embodiment FIG. 10 is an embodiment in which the inlet is made smaller, and FIGS. 11 and 12 are perspective views of the molded product. C...Concrete, K...Horizontal sliding surface, 5...
...Formwork, 7...Moving hopper cylinder, 8...
Shutter, 14...Press cylinder, 16...
...Cylinder for demolding.

Claims (1)

[Scope of Claims] 1. Hardened concrete to be supplied is stored in a movable hopper, and the movable hopper is reciprocated onto the upper surface of a formwork in which a product receiving pallet, which also serves as a formwork bottom plate, is fitted at the lower end of the inner wall of the formwork. Then, concrete is fed into the formwork, and while applying vibration to the formwork, a press plate that is one size smaller than the formwork is inserted into the formwork, and after applying vibration pressure, the product is received in the formwork. In the instant demolding method, in which the pallet is moved above or below the formwork for demolding, an amount of concrete corresponding to the shape of the product to be molded is weighed in advance and stored in a moving hopper.
When feeding the weighed concrete in the movable hopper, the product receiving pallet in the formwork is lowered from approximately the top of the formwork to form a space within the formwork, and the concrete in the movable hopper is then weighed. A metering injection molding method for instant demolding molded products, which is characterized by filling a forming space with material and performing vibration pressure molding. 2. Measuring of concrete product according to claim 1, characterized in that the lower end opening of the movable hopper has a width greater than or equal to the width of the formwork opening and a vertical length sufficiently shorter than the vertical length of the formwork opening. Molding method.