JPH0310007Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial field of application> This invention is an outer peripheral polyhedral concrete in which the inner peripheral surface is formed into a circular hollow shape using a centrifugal forming machine, and the outer peripheral surface is formed so that a flat surface and a curved surface are connected. This invention relates to a demolding device for tube molds.

<Prior Art> Conventional mold demolding devices have been configured to remove the catching, divide the mold into upper and lower halves, and take out the polyhedral concrete pipe.

<Problem to be solved by the invention> However, since the first formwork and the second formwork are deformable formworks, the polyhedral concrete pipe requires a large space and requires a lot of work such as dismantling and assembling the formwork. The disadvantage is that there is a lot of waste in demolding work.

With this invention, when the fixing bolts of the first formwork and the second formwork are loosened, the product can be automatically demolded from either the first or second formwork, and the formwork can be dismantled without requiring a large space. Another object of the present invention is to provide a demolding device for a concrete pipe forming mold having a multifaceted outer peripheral surface, which eliminates waste in demolding operations such as assembly.

<Means for solving the problem> The means for solving the problem according to the present invention are the first, second, third,
As shown in FIG. 4, in a mold provided in a pair of upper and lower first mold frames A and second mold frames B, each of which has an inner wall surface formed by a plane continuous with a plane E and a deformed curved surface, the first mold frame A And at the vertically opposing part of the second formwork B, the first formwork A has a horizontal first retaining edge 7, which is also connected to the second formwork B.
A horizontal second stop edge 8 is formed on the holder, and the first stop edge 7 and the second stop edge 8 are tightened by a first bolt bolt.

Flanges 1A and 1B each having an arcuate outer periphery are fixed to both lengthwise ends of the first formwork A and the second formwork B, and the outer periphery of the flanges 1A and 1B and the first formwork A and the second formwork Brackets 2A, 2 to formwork B
B is fixed, and the inner circular protrusion 3A of the annular catching 3 is fitted into the arc groove 2C of the brackets 2A, 2B and the arc groove 6C of the mounting brackets 6A, 6B.

A circular protrusion 4A of a disc-shaped core board 4 is removably fitted so as to fit between the outer peripheral end surfaces of the flanges 1A, 1B and the inner circular protrusion 3A of the catching 3. Mounting brackets 6A, 6 fixed to the flanges 1A, 1B with two bolts
The catching 3 is fastened by a third bolt to hanging fittings 5A and 5B protruding from the first formwork A and the second formwork B.

<Function> In the above problem solving means, the catching 3 is fixed to the demolding table, and the second bolt toy for the core board 4 and the first bolt toy for the first and second snap edges 7 and 8 are released. After that, remove the core board 4 and loosen the lower third bolt. At this time, the trace of the circular protrusion 4A of the core board 4 becomes a gap 2, and the second formwork B, the second snap edge 8, the flange 1B, the bracket 2B, and the hanging fitting 5A are located on the lower side in the figure. , the mounting bracket 6A and the product 9 are integrally separated from the upper first formwork A and the second retaining edge 8 by their own weight as shown in FIG.
It comes into contact with A (Fig. 4).

Next, the product 9 and the second formwork B are demolded very easily and quickly using a well-known punching device or pulling device (device using a contact plate, an engaging rod, or a hydraulic cylinder), and the product 9 is removed from the mold. Take it out.

<Example> Hereinafter, the first example of the present invention will be described as 1st, 2nd, 3rd, and 4th examples.
Explaining this based on the figure, this is an upper and lower surface formed by two surfaces in which the inner wall surface is connected to the plane E and the deformed curved surface (in Fig. 2, the radius of curvature of the curved surface is large, so it appears to be a straight line at first glance). In a forming mold provided with a pair of first formwork A and second formwork B, the first formwork A has a horizontal shape at the vertically opposing portion of the first formwork A and second formwork B. A horizontal second stop edge 8 is formed on the first stop edge 7 and the second formwork B, and these first stop edge 7 and second stop edge 8 are tightened with a second bolt, Flanges 1A and 1B having arcuate outer peripheries are fixed to both lengthwise ends of the frame A and the second formwork B, and the outer peripheries of the flanges 1A and 1B and the first formwork A and the second formwork B
The brackets 2A, 2B are fixed to the arc grooves 2C of the brackets 2A, 2B and the mounting brackets 6A,
The inner circular protrusion 3A of the annular catching 3 is fitted into the circular arc groove 6C of the circular groove 6B, and the circular protrusion of the disc-shaped core disk 4 is inserted between the outer circumferential end faces of the flanges 1A, 1B and the inner circular protrusion 3A of the catching 3. The core plate 4 is removably inserted, the core board 4 is fastened to the mounting brackets 6A, 6B fixed to the flanges 1A, 1B with a second bolt, and the catching 3 is attached to the first formwork A with a third bolt. , are fastened to hanging fittings 5A and 5B protruding from the second formwork B.

d is a gap between the flanges 1A, 1B and the protrusion 3A of the catching 3; 9 is a molded product, that is, a polyhedral concrete pipe; 10 is a band;
A is a reinforcing plate, 11 is a catching support roll of a molding machine, and 12 is a reinforcing plate for the first formwork A and the second formwork B.

In the above configuration, when a concrete pipe is completed by the centrifugal forming machine, the forming molds supported on the rollers 11 are manually rotated to form the first snapping edge 7 of the first formwork A and the second formwork B. Make sure that the second stop edge 8 is horizontal. The mold containing the steam-cured product is moved to the demolding position using a crane, the catching 3 is fixed to the demolding table, the second bolts for the core board 4 are removed from all the upper and lower parts, and the first retaining edge 7 and the second After loosening the first bolt for the retaining edge 8, remove the core plate 4, and loosen and remove the lower third bolt. At this time, the trace of the circular protrusion 4A of the core board 4 becomes a gap 2, and the second formwork B, the second snap edge 8, the flange 1B, the bracket 2B, and the hanging fitting 5A are located on the lower side in the figure. , the mounting bracket 6A and the product 9 are integrally assembled, and as shown in FIG.
The outer peripheral end of the flange 1B comes into contact with the circular protrusion 3A of the catching 3 (FIG. 4). Next, the product 9 and the second formwork B are demolded very easily and quickly using a well-known punching device or pulling device (a device using a contact plate, an engaging rod, or a hydraulic cylinder).
Take out product 9.

That is, the product 9 can be automatically demolded from one of the first and second molds A and B. Moreover, since the first and second formworks A and B are always connected to the catching 3 by the third bolt, a large space is not required and there is no waste in demolding operations such as disassembling and assembling the formwork.

<Effects of the invention> As is clear from the above explanation, according to the invention, the catching is fixed to the demolding table, and the second bolts for all the upper and lower core boards, the first snapping edge, and the first bolt for the second snapping edge are fixed to the demolding table. Release the bolts, remove the core board, and loosen the third bolt on the bottom. At this time, the gap left by the circular protrusion on the core board becomes a gap, and the second formwork and product located on the lower side separate from the upper formwork under their own weight, and the outer peripheral edge of the flange is caught. comes into contact with the circular protrusion. That is, in this invention,
The product can be automatically demolded from one of the first and second formworks, and since the first and second formworks are always connected to the catching with the third bolt, there is no need for a large space for demolding. This has an excellent effect of eliminating waste in demolding operations such as disassembling and assembling formwork.

[Brief explanation of the drawing]

Fig. 1 is a side view of a mold having a demolding device according to an embodiment of the present invention, Fig. 2 is a longitudinal sectional front view of its end (catching and core board are not shown), and Fig. 3 is a main part. FIG. 4 is an enlarged vertical side view of the main part during demolding. A...First formwork, B...Second formwork, 1A, 1B
...Flange, 2A, 2B...Bracket, 2C
...Circular groove, 3 ... Catching, 3A ... Inner circular protrusion, 4 ... Core board, 4A ... Circular protrusion, 5
A, 5B... Hanging bracket, 6A, 6B... Mounting bracket,
6C...Circular groove, 7...First snap edge, 8...Second snap edge, A...Second bolt, B...First bolt, C...
...Third bolt.

Claims (1)

[Scope of utility model registration request] In a mold provided with a pair of upper and lower first mold frames and second mold frames each having a plurality of inner wall surfaces, the first mold frame is formed at a vertically opposing portion of the first mold frame and the second mold frame. A horizontal first stop edge is formed on the second formwork, and a horizontal second stop edge is formed on the second formwork. Flanges each having an arcuate outer periphery are fixed to both lengthwise ends of the frame and the second formwork, and a bracket is fixed to the outer periphery of the flange and the first formwork and the second formwork, and the arc of the bracket The inner circular protrusion of the annular catching is fitted into the groove and the arcuate groove of the mounting bracket, and the circular protrusion of the disc-shaped core board is fitted between the outer circumferential end face of the flange and the inner circular protrusion of the catching. The core board is removably inserted, and the core board is fastened to a mounting bracket fixed to the flange by a second bolt, and the catching is connected to a hanging part protruding from the first formwork and the second formwork by a third bolt. A demolding device for a concrete pipe forming mold with a multifaceted outer circumferential surface, characterized in that it is fastened to a metal fitting.