JPS5844455B2 - How to apply concrete release oil - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for applying concrete mold release oil to easily obtain a good concrete product.

Conventionally, a mold release oil is applied to the surface of the concrete formwork in order to demold the concrete product.In this case, the mold release oil may be water or water with the addition of an emulsifier such as a surfactant. I try to use a water-soluble mold release oil that is a mixture of oil and oil, or use the oil as it is.

However, in the former case, the use of an emulsifier not only causes the water-soluble mold release oil to dissolve into the moisture content of the fresh concrete and prevent it from curing, but also causes the uncured fresh concrete to adhere to the formwork. Cleaning is required to remove it, which is very time consuming and has the disadvantage of poor work efficiency.

In the latter case, there is a large amount of wasted oil used, such as overcoating, and the price is higher than water-soluble mold release oil, making it uneconomical and expensive to manufacture. This method has disadvantages in that a good product cannot be obtained, such as a large number of air bubbles or oil stains on the surface of the concrete product.

The purpose of the present invention is to eliminate the phenomenon of fresh concrete adhesion to formwork caused by the use of emulsifiers as described above, and to release concrete from the mold so that a good concrete product can be easily obtained by eliminating excessive application of oil. To provide an oil application method.

That is, the present invention introduces water and mold release oil in a separated state into the nozzle part of a spraying device without mixing them, and allows the water and oil to flow out from the nozzle hole without being atomized or dispersed. This is a method for applying concrete mold release oil, characterized in that the oil is applied to the surface of concrete 1 and formwork.

The present invention will be explained below with reference to the drawings.

In Figure 1, 1 is a water storage tank, 2 is an oil storage tank for mold release,
Conduits 4 and 5 with flow rate regulating valves 3 and 3 are connected to the bottom of each storage tank 1 and 2, and these conduits 4 and 5 are connected via a tube 6 to a nozzle section 7 of the spray device.

Then, the water W in the storage tank 1 and the oil O in the storage tank 2 are controlled by the flow rate adjustment valves 3, 3 to have a ratio of about 5 parts water to 1 part oil, and are sent to the nozzle part I through the pipe 6.

This amount of water W and oil 0 are in a state where tf<separated (), where oil 0 is floating in water W and mixed.

Then, the water W and oil 0 guided to the nozzle section 7 are caused to flow out from the nozzle hole 8 and thereby adhere to the surface of the concrete formwork 10.

More specifically, when water W and oil 0, which are separated in the nozzle part 7, are ejected from the nozzle hole 8, they are subjected to the atomization and dispersion action of the nozzle part T and become fine particles as shown in FIG. 2A. It is ejected into the air.

The opening in Figure 2 is an enlarged view of the fine particles 9 ejected into the air, and the surface of the water particles is covered with an oil film.

FIG. 3 explains the process by which the fine particles 9 are formed more clearly.

That is, in the present invention, water W and oil 0 are guided to the nozzle part 7 in a band shape at a fixed ratio, and when the water W and oil O led to this nozzle part 7 flow out from the nozzle hole 8, It is twisted into pieces, turns into a mist, and is dispersed into the air.

In this state, a predetermined ratio of oil is attached to the surface of the water drops, just like when Kintabe candy is cut into small pieces.

When the water scattered in the air becomes granular due to surface tension, the oil adhering to the surface wraps the surface of the water, forming perfect W2O type particles 9.

The fine particles 9 thus obtained collide with the concrete formwork 10 as shown in FIG. The water flows as large droplets without adhering to the surface of the formwork 10.

That is, in the present invention, water W and oil O are introduced into the nozzle section of a spraying device in a band-like state in which oil is suspended in water without being mixed, and the water and oil are passed through the nozzle while keeping the water and oil in a band-like floating state. By ejecting water all at once into the air through the atomization and dispersion effects of water, fine particles are formed that wrap the surface of the water droplets in an oil film, and only the oil film on the surface of the fine particles is applied to the concrete formwork. They succeeded in attaching it to the surface of

Therefore, according to the present invention, the water promotes the diffusion of oil onto the surface of the concrete formwork, and it is possible to apply an appropriate amount of oil uniformly without applying too much.
In addition to being able to reliably eliminate the conventional drawbacks caused by over-applying oil, such as air bubbles and smearing caused by oil on the surface of concrete products, good quality concrete products can be obtained.
It is economical and costs can be reduced because oil can be saved by the amount of water used.

Furthermore, according to the present invention, since no emulsifiers such as surfactants are used, the water adhering to the surface of the concrete formwork immediately separates from the oil and flows, resulting in extremely good demolding of concrete products. .

Furthermore, even if water adheres to the surface of the concrete formwork and this water dissolves into the ready-mixed concrete, since no emulsifier is used, it may have an adverse effect on the hardening of the ready-mixed concrete, unlike conventional methods. This has great effects, such as eliminating uncured fresh concrete from adhering to the surface of the formwork, eliminating the troublesome removal work, and significantly increasing work efficiency. be.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram schematically showing an example of implementing the method of the present invention, FIG. 2 is an explanatory diagram of applying oil to the surface of a concrete form by the method of the present invention, and FIG. It is an explanatory view of a process of forming. W...Water, O...Oil, 7...
Nozzle part, 8... injection hole, 10... concrete formwork.

Claims (1)

[Claims] 1 Water and mold release oil are introduced into the nozzle part of a spraying device in a separated state without being mixed, and the water and oil are flowed out from the nozzle hole without being atomized or dispersed to form a concrete IJ.
-1- A method for applying concrete mold release oil, characterized in that it is applied to the surface of a formwork.