JPS602888Y2 - concrete block formwork - Google Patents

Description

[Detailed description of the invention] In this invention, the main material of the molded plate 1 is formed of aluminum or an aluminum alloy, and the inner surface of the plate 1 is formed of aluminum or an aluminum alloy surface. This invention relates to a formwork for a concrete block in which a magnetic adsorption demolding iron plate 5 is provided on the outer surface of a face plate 1'.

The forming plate 1 constitutes the formwork 3 of the concrete block 2 and includes a face plate 1'.

The inner surface of the molded plate 1 is a smooth surface, but the face plate 1' can have a smooth surface or an uneven surface (FIG. 2).

Duralumin is used as the aluminum alloy and is formed by casting.

A concave surface 4 is formed on the outer surface of the face plate 1', and an iron plate 5 for magnetic adsorption and demolding is fitted into the concave surface 4 and fixed with bolts 6.
The outer surface of the steel plate 5 and the outer surface of the iron plate 5 are formed on the same surface.

In the figure, 7 indicates a flange connecting the molded plate 1.1, and 8 indicates a flange tightening bolt.

Therefore, the molded plate 1.1 and the face plate 1' were soaked in an oil (mold release agent) tank, pulled up and placed on a shelf to be oiled, and then the flange 7.7 of the molded plate 1.1 are aligned and tightened with bolts 8 to form a formwork 3. This is placed on the floor plate 9, concrete is poured from the upper end opening of the formwork 3, and the concrete that appears at the upper end opening is placed on the face plate 1'. After pressing and hardening the concrete, the flat plate 1 and the molded plate 1.1 are demolded and cured.

When the concrete hardens, it generates heat and its temperature increases, and this temperature is conducted to the molding 1.1 and the face plate 1', raising their temperature.

The molded plate 1.1 and the face plate 1' expand due to temperature rise, but due to the expansion difference between the concrete and aluminum or aluminum or alloy, the inner surfaces of the molded plate 1.1 and the face plate 1' and the outer surface of the concrete are different. natural separation.

Conventionally, iron plates have been used for the formwork and face plates of concrete blocks, but iron plates have the same expansion coefficient as concrete and are similar to concrete, so it is difficult to remove them from the mold, and it is necessary to use a large amount of mold release agent.

In addition, since the oil side does not run well, it not only takes time and effort to wipe off the mold release agent, but it also rusts easily, is heavy, and has defects that require effort to handle.

As mentioned above, the present invention is a formwork 3 in which the main material of the molded plate 1 is made of aluminum or an aluminum alloy, and the inner surface of the plate 1 is made of aluminum or an aluminum alloy surface. The formwork is lightweight, easy to handle, hard, and does not rust, so it not only has the practical benefit of increasing its service life, but also formswork that naturally separates from the concrete due to the heat generated during concrete hardening and the difference in expansion with the concrete, making it extremely easy to demold. It is easy to cast, drains oil very well, requires no wiping, and is suitable for concrete block formwork.

In addition, a steel plate for magnetic adsorption and mold removal is provided on the outer surface of the face plate, so when removing the formwork after forming a concrete block, the face plate can be removed quickly and accurately using the magnetic adsorption effect that cannot be achieved with aluminum material. This has the benefit of significantly improving work efficiency.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the concrete block formwork of the present invention, Fig. 2 is an enlarged vertical sectional view taken along line A-A in Fig. 1, Fig. 3 is an external view of the face plate, and Fig. 4 is Fig. 3. It is an enlarged longitudinal cross-sectional view taken along the line BB. 1... Molded plate, 2... Concrete block, 1'... Face plate.

Claims (1)

[Claims for Utility Model Registration] I J & shape base plate 1 main material is formed of aluminum or aluminum alloy, and the inner surface of the same plate 1 is formed of aluminum or aluminum alloy surface,
A concrete block formwork is provided by providing a magnetic adsorption demolding iron plate 5 on the outer surface of a face plate 1' provided on the upper part of the forming plate 1. 2. The formwork for a concrete block according to claim 1, wherein the forming plate 1 is the face plate 1' of the concrete block 2.