JPS61172706A - Mold release method of concrete product and molding formwork - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention has a structure in which the inner formwork is compressed into the inner formwork 11111, which does not open outward like the outer formwork, so that it is in close contact with concrete.
This invention relates to a mold release method for a formwork for forming a concrete product, which allows the inner formwork metal to be easily removed from the product by separating kJ, and the formwork No. 7.

Prior art> When manufacturing concrete products by placing a space formwork inside an outer formwork, screw rods, link mechanisms, etc. are pivotally attached to a circular formwork having a divided part, and the metal is operated. When the inner formwork is squeezed or restored, it moves away from or approaches the inner formwork, and the product r is removed from the formwork.

<Problems to be solved by the invention> The time required to separate and assemble the conventional circular formwork by using screw rods, link structures, etc. is a major hindrance to the work flow. It ended with a . In addition, the strong vibrations cause the cast concrete to flow out from the divided parts, resulting in the formation of joints between the formwork on the product. A space for introducing compressed air is provided in the outer and inner spaces of the seamless inner form by eliminating the dividing part in the frame, and the dimensions of the circular form are determined by injecting compressed air into the space. It is characterized by regulating the concrete and releasing air after concrete is poured and hardened to separate the inner formwork from the surface of the concrete product and facilitate demolding of the product.Placement inside the outer formwork To release the mold from the inside mold frame metal concrete pouring direction, release the filled air and release the outside of the circular form frame.
lrkJtl11 is reversed and the inner form is removed from the inner surface of the product using a demolding device, and then the outer form is opened and the concrete product is demolded.

Then, in order to manufacture the next product, the outer mold is assembled inside the inner mold, and the space is filled with compressed air to maintain the molding dimensions. The order of assembling the circular form frame can be changed so that the inner form frame comes first, or the circular form frame is not carried out to the outside of the product, but is fixed to the space, and the product is removed from the mold by filling and releasing air. Yo5iCL is also fine.

<Embodiment> FIG. 1 is a longitudinal sectional front view of one embodiment of the present invention-J, and FIG. 2 is a plan view thereof. FIG. 3 is a partially vertical front view showing a situation in which the inner mold is squeezed into a circle and the product is removed from the mold.

1 is the formwork body base, and 2 is the solid foot plate I! on one side of the formwork body base l! il1 is added to h-ri, and 5rc is added to both sides.
Lights are attached to the left and right side panels.

On the other hand, a rail 9 on which the movable end plate 3 moves back and forth is provided. 17 is a hanging metal fitting that is fixed to the vertical shaft 19 on both sides of the movable end plate 3 and the left and right H plates 4t. OM is a hollow Bt. It is connected to the outer plate 7 that forms the concrete pouring surface by a strong expandable canvas 8, and by filling or releasing compressed air into the space of 7, the molding dimensions can be reduced and the tension removed. The mold space is formed by forming the mold space. OK KK Figure 1 explains in detail the process of manufacturing vertical box culverts 0 As shown in Figure 1, the inner form frame 175 fixed base is attached to the VCM frame body base 1. After coating the periphery of the circular frame, which is firmly fixed with bolts 12 with 1lifi, the movable end plate 3, which was moved backward during demolding, is moved on the rail 9 via the wheels 10. The end plate is moved until it matches the crystal manufacturing dimension adjustment frame 13 fixed to the form body base.

Next, assemble the left and right side plates 4, wait in a fixed position and fix the adult to the left and right vertical shafts 19 of the stopped movable end plate, approach it via the hinge 5t and connect the pipe 2 to the handle 16
0 is inserted and the poet is fixed. 0 When the formwork is assembled, connect the air hose (not shown) from the compressor tube to the compressed air mixing valve 40 on the inner formwork M, and open the space inside the campus 8. At this time, adjust the product dimensions.Press and fill until the outer plate 7 is completely in contact with the stopper fitting 3' and the needle of the pressure gauge 60 indicates the predetermined position. 0 After filling the compressed air, insert a steel bucket IFi (not shown) from the top of the formwork, and then insert the shade 27 onto the reinforcing metal fittings 15 of the inner formwork M as shown in Fig. 5. After placing the concrete, move the casting large iso 28 to the top and pour in the concrete to fill it up. After finishing the pouring and curing it to harden it, cover it with a sheet to prevent moisture from escaping from the top of the formwork. Wait for the product to harden 0 To demold the product after curing and hardening, first fully open the compressed air release valve 50 of the circular frame M to reduce the pressure of the compressed air filled inside the circular frame. Due to the release of air, the outer panel 7 is 1 lIrb from the concrete product surface and 111 inside! It is brought to I.

1llll provisional 41j where both sides of VC@Kinqi 17 of the slightly moving Lou Ching 3 are fixed! : After opening the left and right sides, move the movable end plate 3 backward on the rail 9, and as shown in Fig. M3, use the vacuum demolding machine 29 to suck the top surface of the hardened concrete product and fix it -1! If the product is in close contact with the inner formwork M with a gap,
The mold is removed upwards while stirring a little bit into the mold and moved to the product yard.

After demolding the product, all the above-mentioned formwork assembly operations, including applying 1 tM of mold release agent to the 8th area of the inner formwork, are repeated, and concrete is poured from above again.

In this case, it is not necessary to fix one piece of the sotsuma board, and both gable boards may be moved by moving the formwork body base l.

Above, an example of the 1II1 type method of forming a box culvert using the inner formwork of the present invention has been explained, and FIG. 4 shows the case of conventional casting of an underdrain block having a hollow part The formwork body base 1 is equipped with side plates 21 and end plates 22t which are to be pushed down through inspection, and the outer plate 7 of the inner formwork M is attached to the inner formwork fixing base 24 provided with the formwork body base IK. Compressed air is filled in the air filling space K between the outer panel 7 and the inner panel 6, which is fixed to the formwork holder 25 at the top with tightening bolts 26.
'The Cutout of Ryōya I! Campus 8 is completely layer resistant at Miyako 31, a rif/cleat rff is installed upwards from 'C, and after curing, the VC is tilted to the right and front and rear on the VC circumferential board 21 and Aguma board 22t, and the round frame Mτ is fixed. As shown in Figure 4 V, lift the fishing tool 30 and pull it upward together with the product to remove the inner formwork. Move to mold brass.

Next, if the air filled in the P3m crushing chamber/bath 8 is released in the demolding area, there will be a gap between the product and the outer panel 7, so the outer panel 7
The mold is released from the product, and a hanging mold removal jig (not shown) is inserted from the side to remove the inner mold from the inside of the product.

In this way, whether the formwork of the present invention is manufactured with vertical rods or with rolling rods, compressed air is supplied or released to the inner plate of the inner formwork and the top K of the outer plate, so that there is no separation part. It is easy to assemble and demold the inner formwork.

Also, the outer plate 7 Shikin Js made of VcF that comes in contact with concrete,
R, P-? When using plastic composites reinforced with glass fibers, IR cable fibers, etc., there is no concrete layer even if the mold release agent does not dissipate, and the surface of the material is glossy.
Because of this, it also has a role that helps improve the appearance of the skin.

In addition, this invention is applicable not only to hollow products, but also to the inner part of the water channel, as shown in Figure 7. yc side,
It can be applied to opening, etc., depending on the product shape VC! It's good because it can be used in a variety of ways without being edible.

<Effects of the Invention> The formwork of the present invention is a mold that can be tightened without dividing the formwork by filling or releasing compressed air into the space between the outer plate and the disc, and does not open outward. Since the frame can be removed from the product, and there are no traces or seams left behind from the divided part, it is possible to remove the mold from the product surface.

Also, 6 products with uneven surfaces? Even if the product is placed in a bar, it is possible to move away from or approach the product without moving the inner formwork by releasing the light of compressed air. ! l! The key to this project was to significantly reduce the time spent on assembling formwork in narrow spaces with complex product shapes.

4 Simple W5L light in Figure (2) Figures 1 and 2 are a longitudinal sectional front view and a plan view of the vertically cast formwork of the present invention, and Figure 3 is #IIa! ! Figure 4 is a vertical front view showing the situation, Figure 4 is a front view of horizontal pouring, Figure 5 is a -S vertical front view showing the concrete pouring situation, Figure 6 is an enlarged view of the demolding situation, Figure 7- and others. The product perspective view of implementation-1.

A...Product, C...Concrete, K
・・・・・・Air light part, 1・・・・Formwork main base, 8・・・・Campus, 14・・・・Assembling bolt, 18・・・・Kakekin No. G Part 1, 23...
...Charge, 25...Inner formwork holder, 31...
... End plate notch @ section, 40... Filling port, 5° opening port, 60... Pressure #'i.

Claims (4)

[Claims] (1) The inner plate 6 of the inner formwork, which cannot be opened outward like the outer formwork, and the outer plate 7, which forms the concrete pouring surface, are combined with a flexible material that can be expanded and contracted so that they can be filled with compressed air. A formwork for concrete forming characterized by filling the space with compressed air and placing concrete, and after the concrete hardens, the filled air is released and the formwork is contracted inward from the concrete placement surface and released. Mold release method. (2) A method for releasing a mold from a concrete surface while a circular form is fixed in the mold release method described in claim 1. (3) A compressed air filling section is provided on the back surface of the outer panel 7 that forms the concrete molding surface, which is connected to the inner panel 6 using a stretchable flexible material and can fill and release compressed air into the bonded space. Formwork for forming concrete products featuring: (4) A formwork for concrete forming according to claim 3, characterized in that the outer plate 7 is a plastic composite material reinforced with metal or various fibers.