JP3174498B2 - Centrifugal formwork - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a concrete product by centrifugally forming an elongated concrete product, and a centrifugal molding form used for the method.

[0002]

2. Description of the Related Art Conventionally, a method for producing a concrete product by centrifugal molding and a centrifugal molding form used for the method are disclosed, for example, in JP-B-53-36392 and JP-A-51-11785.
No. 4, Japanese Utility Model Publication No. 5-33122, and the like. In each of these molds, the individual molds are arranged in an annular shape in a cylindrical outer frame, and the entire form is cylindrical. However, the individual molds are provided integrally with the mold.

[0003]

The conventional centrifugal molding form has the following problems. Since the individual molds are integrated with the formwork, in order to continuously mold a large number of products, concrete must be removed using another form while waiting for the concrete put into the form to harden (curing period). I have to throw it. That is, many molds must be used, which is costly. This is very dangerous because the formwork must be suspended vertically to drop the concrete product down. 5-331
22 does not need to be vertical, but a large number of spacers must be operated by bolts, so the demolding and assembly work is complicated, and the dimensional accuracy of the product is reduced due to many fine moving parts. I do. Since the individual molds are integrally assembled in a cylindrical shape, for example, it is not possible to manufacture a high value-added product in which natural stone is stuck on the surface. This is because, when assembling the formwork, it is not possible to perform work such as attaching natural stone to the inner surface. The present invention has been made to solve such a problem.

[0004]

SUMMARY OF THE INVENTION The present invention provides a one-ended donor.
The end plate having a toroidal shape, the ring-shaped frame ring at the other end, and the end plate
And a plurality of rings fixed to the frame ring and arranged annularly in the axial direction
And a donut shape on the outside of the frame ring
Cylindrical outer frame with detachable end plate
Guy that slides along the slit-like opening and the rail
Consisting of a plurality of individual molds having a substantially cylindrical shape with
Another type can be inserted into the outer frame along the rail or removed from the outer frame.
With all individual molds inserted
Individual type is arranged in an annular shape so that the opening is open inward
It is a centrifugal molding form characterized by being performed .

In the centrifugal molding form of the present invention,
Protrusions are provided on both end faces of the individual mold,
An engaging hole is provided in the end face plate at the end, and the projection is engaged with the engaging hole.
By doing so, the individual type can be fixed.

In the mold of the present invention, since the individual mold escapes from the outer frame, the individual mold can be taken out of the outer frame after centrifugal molding, and only the individual mold can be carried to the curing room to be cured. A new individual mold can be inserted into the outer frame and centrifugal molding can be continued. In other words, many individual molds are used for continuous molding,
Since only one outer frame is required, cost reduction can be realized.

The individual mold can be removed from the outer frame and handled in the same manner as a normal mold that is not a centrifugally formed mold, so that the mold can be easily removed, the trash can be easily cleaned, and natural stone can be stuck on the inner surface. Delicate work can be easily performed. Since the opening and closing mechanism of the individual mold can be made in the same manner as a normal mold, the number of movable parts is small, and a concrete product can be manufactured with high dimensional accuracy. Furthermore, there is no need to hang the entire form vertically and remove the mold as in the prior art, which is very safe.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing embodiments. FIG. 1 shows a formwork 1
2 is a cross-sectional view of the mold 1, FIG. 3 is an explanatory view of the outer frame, FIG. 4 is a perspective view of the individual mold opened, and FIG. 5 is a cross-sectional view of the individual mold. 6 to 10 show the form 1
It is explanatory drawing of the manufacturing method of the used concrete product.

The mold 1 is a centrifugal mold for manufacturing a step block, and comprises an outer frame 2 and twelve individual frames 3. The outer frame 2 is composed of rails 4, end face plates 6, 7, a frame ring 9, and the like. As shown in FIGS. , And is entirely tubular. Outside the frame ring 9 on the front side, the end face plate 6 is further fixed with fixing pieces 10 and bolts 18. The front end plate 6 is detachable by bolts 18. A fixing ring 8 is further fixed to the outside of the rear end face plate 7 with fixing pieces 10 and bolts 18. The end plates 6 and 7 are donut-shaped disks, and are formed with engaging holes 6a and 7a for fixing the individual mold 3. As shown in FIG. 1, the rails 4 are one set of two opposed rails, and a total of twelve sets are annularly arranged.

The individual mold 3 has a mechanism for opening and closing so that the hardened concrete product can be taken out, that is, detachable. As shown in FIGS. 4 and 5, the individual mold 3 includes an L-shaped main body 11, side plates 12, and end plates 13 at both ends. The side plate 12 is a hinge 16 and the end plate 13 is a hinge 17
Each is hinged to the L-shaped main body 11. Such an opening and closing mechanism is the same as an ordinary opening and closing mechanism of a mold that does not perform centrifugal molding. At the lower part of the L-shaped main body 11, six wheels on one side, that is, a total of twelve wheels are provided as guide portions 5.
The wheel engages with and slides along the rail 4 of the outer frame 2.

As shown in FIG. 5, a natural stone plate 20 is adhered to the inner surface of the individual frame 3, concrete is poured into the individual stone plate 20, the concrete is hardened, and a so-called natural stone plate is adhered to the surface. Dried concrete products can also be manufactured. Since the individual frame 3 is taken out from the outer frame, such an operation can be performed in exactly the same manner as a normal mold without centrifugal molding.

The side plate 12 of the individual frame 3 has projections 14 at both ends.
Are formed, and when inserted into the outer frame, the end face plate 6,
7 are completely fixed by engaging with the engaging holes 6a, 7a.

The individual mold 3 is inserted into the outer frame 2 with the end plate 6 removed, as shown in FIG. The guide portion 5 (wheel) of the individual mold 3 is engaged with the rail, and is smoothly inserted along the rail. When the twelve individual molds 3 are inserted, as shown in FIG.
Are arranged in an annular shape, and twelve slit-shaped openings 15 are opened in the inner peripheral surface.

The centrifugal molding of the concrete product using the mold 1 is performed as follows. First, as shown in FIG. 6, the individual mold 3 is inserted into the outer frame 2 with the end face plate 6 removed. At this time, it is convenient to use the table 22 shown in FIG.
The individual mold 3 is carried on the table 22 by a crane, a forklift, or the like. After inserting one individual mold, the outer frame is rotated by 30 degrees by the rotating machine 21 and the next individual mold is inserted.

After inserting all 12 individual molds, as shown in FIG. 7, the end plate 6 is attached and completely fixed with the bolts 18, and the assembling of the mold 1 is completed. Then, the rotating machine 21 is rotated at a high speed, and concrete is poured into the inside of the form from the center hole of the end plate 6 or 7. The poured concrete has a slit-shaped opening 1 due to centrifugal force.
5 to 12 individual molds 3 are filled and centrifugal molding is performed.

When the centrifugal molding is completed, as shown in FIG. 8, the end face plate 6 is removed, and the individual mold 3 is released from the outer frame 2. The escape operation of the individual type is performed in the reverse procedure of the insertion operation. The individual mold taken out of the outer frame 2 is transported to a curing room where steam curing is performed. FIG. 9 shows an example in which curing is performed using the curing tent 23. The individual molds 3 are stacked as shown in the figure, covered with a curing tent 23, filled with steam and hardened concrete.

On the other hand, the centrifugal molding is completed, and the outer frame from which all the individual molds are taken out returns to FIG. 6, a new individual mold is inserted, and the centrifugal molding is continuously performed.

When the curing is completed and the concrete is hardened, the side plate 12 and the end plate 13 are opened as shown in FIG. 4, and for example, as shown in FIG.
4 removes the concrete product 25.

In the above-described embodiment, the mold for forming the step block has been described. However, the type of the block is not limited to this. By changing the shape of an individual mold such as a U-shaped groove block or a tubular block. Blocks of various shapes can be manufactured.
Also, the shape of the outer frame, the shape and fixing method of the end face plate, the fixing method of the individual type, and the like are not limited to the present embodiment.

[0020]

According to the present invention, since one outer frame can be used repeatedly for continuous centrifugal molding, the cost can be reduced. The individual type escapes from the outer frame,
Since it can be handled in the same manner as a normal formwork, it can be easily removed from the mold, cleaning of the trash can be easily performed, and work such as pasting natural stone on the inner surface can be easily performed. Since the opening and closing mechanism of the individual mold can be made in the same manner as a normal mold, the number of movable parts is small, and a concrete product can be manufactured with high dimensional accuracy. Furthermore, there is no need to hang the entire form vertically and remove the mold as in the prior art, which is very safe.

[Brief description of the drawings]

FIG. 1 is a front view showing a formwork 1 of an embodiment with an end face plate removed.

FIG. 2 is a sectional view of the mold 1. FIG.

FIG. 3 is an explanatory diagram of an outer frame.

FIG. 4 is a perspective view showing a state where an individual mold is opened.

FIG. 5 is a sectional view of an individual mold.

FIG. 6 is an explanatory diagram of a method for manufacturing a concrete product using the formwork 1 ;

FIG. 7 is an explanatory diagram of a method for manufacturing a concrete product using the formwork 1 ;

FIG. 8 is an explanatory diagram of a method for manufacturing a concrete product using the formwork 1 ;

FIG. 9 is an explanatory diagram of a method for manufacturing a concrete product using the formwork 1 ;

FIG. 10 is an explanatory diagram of a method for manufacturing a concrete product using the formwork 1 ;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Form frame 2 Outer frame 3 Individual type 4 Rail 5 Guide part 6 End plate 7 End plate 8 Fixing ring 9 Frame ring 10 Fixing piece 11 L-shaped main body 12 Side plate 13 Wife plate 14 Projection 15 Opening 16 Hinge 17 Hinge 18 Bolt 20 Natural Stone slab 21 Rotating machine 22 units 23 Curing tent 24 Vacuum crane 25 Concrete products

Claims (2)

(57) [Claims] 1. A donut-shaped end face plate ( 7 ) at one end, a ring-shaped frame ring ( 9 ) at the other end, and both ends fixed to the end face plate and the frame ring, and are arranged annularly in the axial direction. Multiple rails
( 4 ) a cylindrical outer frame having a donut-shaped end plate ( 6 ) removably attached to the outside of the frame ring ( 9 ).
( 2 ) and a plurality of substantially cylindrical individual molds ( 3 ) each having a slit-shaped opening ( 15 ) in the axial direction and a guide portion ( 5 ) sliding along the rail ( 4 ) , Individual type
( 3 ) can be inserted into the outer frame ( 2 ) or escape out of the outer frame ( 2 ) along the rail ( 4 ).
In the state where ( 3 ) is inserted, the individual mold ( 3 ) has the opening
( 15 ) The centrifugal molding form characterized by being arranged annularly so as to open inside. 2. The centrifugal molding form according to claim 1, wherein projections (14) are provided on both end faces of said individual mold ( 15 ) , and correspondingly, said end faces ( 6 ) and ( 7 ) are provided on said end face plates ( 6 ) and ( 7 ) . Engagement holes ( 6
a ) and ( 7a ) are provided, and the projection ( 14 ) is connected to the engagement hole ( 6 ).
a), a centrifugal molding frame which is characterized in that the fixed (Individualized Engaging in 7a) (15)