JPS6246517B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION In vacuum impregnation, etc., especially when the impregnating liquid is expensive, the present invention impregnates only the necessary parts of the object to obtain the impregnation effect and reduce costs. This method is used when you want to prevent the rise in

For example, recently, paving has been carried out using a special concrete block called ILB (registered trademark).

This ILB is a concrete block of approximately 12 x 24 x 8 (cm) with corrugated irregularities on the sides for interlocking purposes, and when it is impregnated with MMA (methyl meth acrylate) and hardened, it has a compressive strength.
High strength of 1500Kg/cm2 or ^more .

When this special concrete block is used for road paving in snowy countries, it can be expected to have about five times the abrasion resistance of asphalt against the spiked tires and chains of automobiles used in the winter, and even if some parts are worn out, Although it has many advantages such as only the blocks need to be replaced, the MMA used for impregnation and hardening is a very expensive chemical, so ILBs that are completely impregnated are expensive.

However, with ILB used for pavement, it is sufficient to impregnate and harden only the parts that actually wear during use, and there is no need to use expensive chemicals in other parts.

The present invention provides a method for performing partial impregnation reliably, easily, and inexpensively when it is desired to impregnate only a certain part of an object to be impregnated.

That is, the present invention holds a basket-shaped container storing an object to be impregnated above the liquid level of an impregnating liquid tank containing an impregnating liquid therein, and lowers the basket-shaped container or raises the impregnating liquid tank to remove the impregnating liquid. The object to be impregnated is immersed in an impregnating liquid from the lower surface to a certain depth, and only the portion immersed in the impregnating liquid is impregnated.

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows an example of the implementation of the present invention.
2 is a vacuum tank, 2 is a vat filled with impregnating liquid 3 to a certain level, 4 is a basket supported by a vertical device using eccentric wheels 5 and 5', and 6 is connected to vacuum tank 1 via a valve 7. It is a vacuum pump.

Next, the operating procedure will be explained. First, the vat 2 filled with the impregnating liquid 3 to a certain level is placed in the vacuum chamber 1, and then the basket 4 containing a certain number of ILB(P) is suspended and supported by the vertical device.

In this case, the adjustment is made so that the basket 4 is barely immersed in the impregnating liquid 3.

Next, after setting the lid 8, the vacuum pump 6 is operated to evacuate the inside of the tank.

The degree of vacuum is stopped to a level slightly higher than the vapor pressure at that temperature.

In the case of MMA, it is approximately 5 torr at 15°C. Once the vacuum is raised, move the eccentric wheels 5, 5' of the up-and-down device to lower the cage 4, and lower the bottom surface of the ILB (P) by, for example, 2
~3 cm is immersed in the impregnating liquid 3, and then the vacuum break valve 9 is opened to return the pressure to atmospheric pressure, at which time vacuum impregnation is performed.

The extent to which MMA permeates into ILB(P) is approximately 1 cm per hour when immersed in the atmosphere, and approximately 2 to 4 cm per 30 minutes when immersed in vacuum.

Therefore, after about 30 minutes have elapsed, the lid 8 is removed and the basket 4 is pulled up and moved to the polymerization chamber.

This completes one cycle of the impregnation operation.

If a large amount of impregnation is desired, if the lid 8 is moved and used for another vacuum chamber during the 30 minute standing time mentioned above, one lid can be used for multiple vacuum chambers, which is economical.

The impregnating liquid 3 reduced by one impregnation is replenished to a specified level before starting the next impregnation.

When the day's work is finished, the vat 2 can be lifted up or transferred to a storage tank using a pump or the like, and can be used again the next day.

If vacuum impregnation were to be carried out using the conventional method instead of the present invention, it would be necessary to send a fixed amount of impregnating liquid from the reservoir for each operation and send it back after the impregnation, which would require complicated equipment. Not only does this require extra time, but when the work is finished, it may be necessary to wash all the pipes along the way with a solvent. If there is a work error, check the piping, valves, etc.
Resins such as MMA may harden, making operation extremely difficult. However, the present invention has the practical benefit of solving these problems all at once.

In the embodiment described above, the basket 4 is lowered, but the butt 2 may be raised instead. (Ascending method) Fig. 2 shows an example of the ascent method, in which the basket 4 is suspended on brackets 10 and 10' provided in the vacuum chamber 1, and the vat 2 is raised by a raising device using an air cylinder 11. It was designed to let you do so. The only difference in the operating method is that the air cylinder 11 is operated during immersion, so a detailed explanation will be omitted since it is self-evident.

Although the above description has been made regarding ILB, it goes without saying that the present invention is also effective for impregnating inorganic molded bodies such as general concrete molded bodies, bricks, and clay molded bodies.

Further, although the case of vacuum impregnation has been explained here, it goes without saying that impregnation under normal pressure is also effective.

[Brief explanation of the drawing]

1 and 2 are cross-sectional views of embodiments of the present invention, respectively. 1... Vacuum chamber, 2... Butt, 3... Impregnation liquid, 4... Vertical device, 5, 5'... Eccentric ring, 6... Vacuum pump, 7
...Valve, 8...Lid, 9...Vacuum break valve.

Claims (1)

[Claims] 1. A basket-shaped container containing an object to be impregnated is held above the liquid level of an impregnating liquid tank containing an impregnating liquid inside, and the basket-shaped container is lowered or the impregnating liquid tank is raised to remove the object to be impregnated. A partial impregnation method characterized by immersing the lower surface in an impregnating liquid to a certain depth.