JPS62144740A - Mixing defoaming machine - Google Patents

Abstract

PURPOSE:To effectively perform the mixing and defoaming of a liquid to be treated and a powder regardless of the characteristics of the liquid to be treated, by providing a pump chamber to the bottom part of a vertical vacuum tank having an inverted cone shaped bottom part and emitting the liquid sucked in a pump onto the inclined plate provided to the upper part of the vacuum tank. CONSTITUTION:When a prescribed amount of a liquid such as a resin liquid is supplied to a vacuum tank and a pump consisting of impellers 3, guide vanes 4 and a drive shaft 5 is operated, the liquid is sucked in the pump to be emitted to an inclined plate 10 through a conduit 8 and flows down along the inclined plate to fall on the liquid in the tank. When a powder such as powdery silica sand is gradually supplied to the tank by a supply nozzle 16, the powder falling on the surface of the liquid is sucked in the liquid by a turbine blade 6 to be mixed with the liquid and the resulting mixture is further sucked in a pump chamber and defoamed under vacuum while flows down along the inclined plate. By repeating this process, mixing and defoaming are effectively performed within a short time regardless of the viscosity of the liquid and the treated liquid sufficiently subjected to mixing and defoaming is taken out from a take-out valve 11.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a mixing and defoaming machine for mixing liquid and powder in a short time and vacuum defoaming.

[Conventional technology]

As materials for various molded products, etc., liquid such as resin liquid with a certain viscosity is mixed with fine powder such as silica or alumina, and then the liquid to be processed in the mixture is vacuum-treated. Defoamed products are generally used.

As shown in FIGS. 2 and 3, the mixing and defoaming machine used for the above purpose is of the type consisting of a vertical vacuum tank 1 having a liquid resin supply hole 14 and a powder supply nozzle 16. Most of them are.

However, as shown in Fig. 2, a type in which a turbine blade 6 is provided on a drive shaft 5 driven by a motor 17 has a simple structure and is inexpensive, but its stirring efficiency is poor and complete mixing cannot be achieved. There is a problem that it takes a considerable amount of time to rotate the drive shaft 5 driven by a motor 17, as shown in FIG. Although this type is used for mixing and defoaming in a relatively short period of time, the liquid to be treated has a considerable viscosity due to the inefficient lift pump due to its structure. Otherwise, the liquid cannot be circulated, and even if you try to use the pump at a high rotation speed, it is not possible to increase the rotation speed too much because it has stirring blades 18. The disadvantage is that it cannot be used to mix liquids.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a mixing and defoaming machine which can completely mix and defoamer any low-viscosity liquid in a short period of time, thereby eliminating the above-mentioned conventional drawbacks.

[Structure of the invention]

In order to achieve the above object, the mixing and defoaming machine of the present invention includes a pump for transferring a liquid to be treated consisting of a mixture of liquid and powder to the bottom of a vertical vacuum tank having an inverted conical bottom. a pump chamber having a pump chamber, a discharge nozzle that can discharge the liquid to be treated discharged from the pump into the upper part of the vertical vacuum tank, and an inclined plate that can receive the liquid to be treated discharged from the discharge nozzle. Consisted of.

〔Example〕

The present invention will be described in detail below with reference to the drawings. Fig. 1 is a schematic sectional view of a mixing and defoaming machine in an embodiment of the present invention, and shows a vertical vacuum tank 1 having an inverted conical bottom. A pump chamber 2 is provided at the bottom of the pump chamber, and a vacuum device 1 is installed at the top of the pump chamber 2.
5 are connected.

This pump chamber 2 is equipped with an impeller 3, a guide vane 4, and a drive shaft 5 inside, and a turbine blade 6 is attached to the drive shaft 5 to constitute a pump, which is driven by a motor 17 outside the tank. This allows the liquid to be processed, which consists of liquid and powder, supplied into the vacuum tank 1 to be transferred.

Next, a liquid discharge lower is provided in the pump chamber 2, and a discharge nozzle 9 is connected to the pump chamber 2, which can discharge the liquid to be treated discharged by the pump to the upper part of the vacuum tank 1 via a conduit 8.

Further, an inclined plate 10 is provided below the discharge nozzle 9 in the vacuum tank 1, and is formed to receive the liquid to be treated discharged from the pump and spread it into a thin film to facilitate degassing. However, since the surface area of the inclined plate 10 increases as the liquid to be treated goes down the slope, the liquid to be treated will be sufficiently degassed and degassed during this time.

Further, a take-out valve 11 is attached below the pump chamber 2, and the take-out valve 11 can be opened and closed as necessary to draw out the liquid to be treated.

On the other hand, a plurality of baffle plates 12 are provided on the side surface of the vacuum tank 1 and serve to increase the stirring effect of the turbine blades 6. A hole 14 and a powder supply nozzle 16 for supplying powder are provided on the side of the tank.

Further, the vacuum tank 1 and the conduit B can be provided with a heating jacket if necessary.

Next, to explain the function of the mixing defoaming machine with the above configuration, first, a specified amount of liquid such as resin liquid is supplied to the vacuum tank 1, and then the pump and turbine blades 6 are driven. When the pump is operated by rotating the motor 17, the pump always draws liquid into the pump and generates a discharge pressure, regardless of conditions such as the viscosity and temperature of the liquid to be treated.

The liquid sucked into the pump passes through the liquid discharge lower and the conduit 8 and is discharged from the discharge nozzle 9 onto the inclined plate 10.
The liquid flows down and falls onto the liquid stored at the bottom of the vacuum tank 1.

While circulating the liquid to be treated in this way, when powder such as silica sand powder or alumina powder is gradually supplied from the powder supply nozzle 16, the powder that has fallen to the surface of the liquid is removed by the turbine blades 6 into the liquid. The liquid is drawn into the pump chamber 2, where it is thoroughly mixed with the liquid by the stirring effect of the impeller 3 and the guide vane 4, and is then discharged from the liquid discharge lower through the conduit 8 and from the discharge nozzle 9 onto the inclined plate 10. As it flows down on the inclined plate 10, it is vacuum degassed and falls onto the liquid to be treated stored inside.

By repeating this process, the entire liquid is thoroughly mixed with the powder and defoamed in a short period of time, and the sufficiently mixed and defoamed liquid to be treated is taken out from the take-out valve 11 and used.

Note that the rotation speed of the drive shaft 5 driven by the motor 7 may be appropriately selected according to the characteristics such as the viscosity and specific gravity of the liquid to be treated.

〔Effect of the invention〕

As explained above, if the mixing and defoaming machine of the present invention is used, a complete mixing and defoaming effect can be achieved regardless of the characteristics of the liquid to be treated or the amount of liquid inside the vacuum tank. You can expect it.

Therefore, by forming various molded products and molded products using the liquid to be mixed and defoamed using the mixing and defoaming machine of the present invention, the quality of the products can be improved.

[Brief explanation of drawings]

FIG. 1 is a schematic sectional view of a mixing and defoaming machine according to an embodiment of the present invention, and FIGS. 2 and 3 are schematic sectional views of different conventional mixing and defoaming machines, respectively. DESCRIPTION OF SYMBOLS 1... Vacuum tank, 2... Pump chamber, 3... Impeller, 4... Guide vane, 5... Drive shaft, 9...
...Discharge nozzle, 10... Inclined plate, 17... Motor.

Claims (1)

[Claims] A pump chamber having a pump for transferring a liquid to be treated consisting of a mixture of liquid and powder is provided at the bottom of a vertical vacuum tank having an inverted cone-shaped bottom, and a pump chamber for transferring the liquid to be treated consisting of a mixture of liquid and powder is provided, and the liquid to be treated discharged from the pump is A mixing and defoaming machine that includes a discharge nozzle capable of discharging at the upper part of the vertical vacuum tank and an inclined plate capable of receiving a liquid to be treated discharged from the discharge nozzle.