JP3206769B2 - Continuous mixing and kneading equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous mixing and kneading apparatus, and more particularly, in the field of civil engineering and construction, for example, continuously kneading a cement paste, mortar, concrete, or the like, or a ceramic product. In manufacturing, ceramic powder, binder,
For continuously supplying a mixture of water and water.

[0002]

2. Description of the Related Art Conventionally, when water and a hydraulic substance are mixed and kneaded at a construction site to produce a hydraulic composition in a wet state, a plaster mortar mixer, a high-speed grout mixer, A method of manufacturing using a so-called batch mixer of the so-called kneading type, such as a forced kneading mixer, or a kneading shaft in which a screw for powder feeding and a kneading blade are coaxially installed in a cylindrical or U trough-shaped casing. Use a continuous kneading device that incorporates and supplies water into the casing, supplies powder from the hopper at one end of the casing, and discharges the wet-type hydraulic composition in which water and the hydraulic composition are mixed and kneaded from the other end. (JP-A-55-165134).

[0003] However, the method using a batch mixer of the tarai type is not suitable for measuring, charging, and adding water and hydraulic substances.
All processes such as adjustment of the kneading time and discharge of the kneaded material have to be performed once each time, which often depends on the labor of the operator, work efficiency is poor, and constant quality is always maintained. There was a problem that it was difficult.

Further, in a method of kneading using a conventional continuous kneading apparatus, the kneaded material adheres to a transfer screw or an inner wall of a casing, grows, and causes clogging in the casing or stopping of a motor due to an overload, thereby stabilizing the motor. There was a problem that kneading was not possible.

The inventor of the present invention has conducted various studies in order to solve the above-mentioned problems of the prior art, and as a result, by installing a forced transfer blade between the transfer screw and the kneading blade, the mixture of the material to be kneaded and the liquid has been obtained. It has been found that it is possible to sufficiently transfer the mixture to the kneading casing 13 in which the kneading blades are installed without delay, prevent the mixture from adhering to the rotating shaft and the inner wall of the casing, and obtain the knowledge that can solve the problems of the conventional technique. The invention has been completed.

[0006]

That is, according to the present invention, the material to be kneaded supplied from the raw material inlet 1 to the transfer casing 12 is removed .
A feed screw 2 for transporting the mixed kneading casing 13 is installed in the kneading casing 13, the feed screw 2 coaxially, installed and deported blade 8 and the kneading blade 4
And the pitch of the forced transfer blade 8 is
This is a continuous mixing and kneading apparatus in which the forced transfer blade 8 is provided between the transfer screw 2 and the kneading blade 4.

Hereinafter, the present invention will be described in more detail with reference to the drawings as an embodiment, but the present invention is not limited thereto.

The material to be kneaded according to the present invention contains, as main components, cements such as ordinary Portland cement and early-strength Portland cement, and latent hydraulic materials such as slag and pozzolanic substances. Aggregates such as gravel, as well as compositions containing admixtures such as expanding agents, water reducing agents, fluidizing agents, hardening accelerators, and hardening retarders, or so-called fine ceramics such as silicon nitride and silicon carbide And the like.

The material to be kneaded is supplied to the transfer casing 12 from the material inlet 1 in a dry state or a pre-wet state.

[0010] The supply method is not particularly limited, but it is preferable to continuously and quantitatively supply using a general supply device such as a screw feeder or a rotary feeder.

The raw material inlet 1 provided at the upper part of the transfer casing 12 is not particularly limited as long as the material to be kneaded flows down into the casing of the transfer screw 2 without delay. It is preferable that the material to be kneaded maintain a tilt angle at which the material to be kneaded can drop smoothly or more, and have a two-side drawing structure.

The transfer screw 2 mounted in the transfer casing 12 is driven by a variable speed motor 9 of a continuously variable transmission type capable of changing the number of rotations. When the transfer screw 2 is rotating at the number of rotations necessary for kneading. It is sufficient that the material to be kneaded in the dry state in a predetermined amount has a shape capable of transferring the material to the kneading casing 13 without delay.
The shape is not particularly limited.

The forced transfer blades 8 sufficiently transfer the mixture of the material to be kneaded and the liquid to the kneading casing 13 in which the kneading blades are installed, and prevent the mixture from adhering to the rotating shaft and the inner wall of the casing. The rotary shaft 3 is shared with the transfer screw 2 and the kneading blade 4, and is provided between the transfer screw 2 and the kneading blade 4.

[0014] The pitch of the deported wings 8 Ru der less than half of the pitch of the feed screw 2. If the ratio is larger than 1/2, the force for transferring the mixture of the material to be kneaded and the liquid to the kneading blades 4 without delay is reduced, and the mixture may adhere to the rotating shaft or the inner wall of the casing, which is not preferable.

In the present invention, the material to be kneaded and the liquid are mixed and kneaded in a kneading casing.

Here, the liquid refers to water, an aqueous solution containing a water-soluble admixture or a liquid admixture, and an emulsion or latex.

The mixing of the liquid is not particularly limited as long as it can be supplied into the kneading casing so as to uniformly mix the material to be kneaded and the liquid. It is also possible to adopt a method of installing a plurality of such members in the direction.

The mixture of the material to be kneaded and the liquid is sequentially supplied to the kneading blades 4 by the action of the forced transfer blades 8.

The kneading blade 4 shares the rotating shaft 3 with the transfer screw 2 and the forced transfer blade 8, and
It is installed in front of.

The shape, number, mounting position, size, etc. of the kneading blades 4 are not particularly limited, but the distance between the kneading blades 4 and the forced transfer blades 8 is equal to or less than the pitch of the kneading blades 4. It is preferable to attach to a position where the distance is equal to. Further, in order to efficiently perform kneading by applying a shear force to the mixture, the shape is preferably a flat plate, and
It is desirable to have an appropriate angle, for example, a twist of 5 to 45 ° with respect to the rotation axis cross section.

The rotation speed of the transfer screw 2, the forced transfer blade 8 and the kneading blade 4 can be adjusted by adjusting the rotation speed of the variable motor 9.

The kneaded material kneaded by the kneading blades 4 is continuously discharged from a discharge port 10.

In the present invention, by installing the forced transfer blades 8, it is possible to prevent the mixture of the material to be kneaded and the liquid from adhering to the rotating shaft and the inner wall of the casing to prevent the inside of the casing from being blocked, and to stabilize the kneading machine. Although a continuous operation is possible, in order to further enhance the effect of preventing adhesion and blockage of the mixture of the material to be kneaded and the liquid, for example, a slide-type flow path restricting plate 11 is installed. It is preferable to adjust the opening area of the flow path by sliding in the vertical direction.

The flow restricting plate 11 is preferably provided at a boundary between the transfer casing 12 in which the transfer screw 2 is installed and the kneading casing 13 in which the kneading blades 4 are installed. In particular, the transfer screw 2 and the kneading blades 4 are connected. It is preferable to install in such a manner as to block the upper half flow path from the rotating shaft 3. The flow path restriction plate 11 is, for example,
It is preferable that the attachment / detachment is easy, such as being inserted from the outside of the kneading casing 13.

The width of the surface for controlling the flow path by the flow path restricting plate 11 may be such that the mixture of the material to be kneaded and the liquid, which has been lifted up by the kneading blades 4, can be prevented from returning to the transfer screw 2. There is no restriction. It is expected that the amount of the material to be kneaded by the kneading blades 4 varies depending on the kind of the material to be kneaded. Therefore, it is preferable to be able to slide up and down so that the width of the control surface of the flow path can be arbitrarily changed.

The transfer screw 2, the rotary shaft 3, the kneading blades 4 and the transfer casing 1 in the continuous mixing and kneading apparatus of the present invention.
The material of the kneading casing 13 and the kneading casing 13 are not particularly limited, and metals such as iron, stainless steel, and aluminum, lining with ceramics, and reinforced plastics can be used.

[0027]

According to the continuous mixing and kneading apparatus of the present invention, in addition to the ordinary rotary kneading blade, a forced transfer blade for forcibly transferring the mixture of the material to be kneaded and the liquid to the kneading blade is provided. A stronger shearing force is applied to the mixture of the material to be kneaded and the liquid than when only the kneading blades are used, and excellent kneading ability can be exhibited. Further, it was possible to suppress the adhesion to the inside of the mixer, particularly to the inside of the casing of the transfer screw, to perform a continuous stable operation for a long time, and to obtain a uniform kneaded material. Further, since the mixing and kneading are sufficiently possible, the length of the kneading portion is shorter than that of the continuous kneading device having only the kneading blades exhibiting the same kneading ability, and a smaller mixing and kneading device can be provided.

[Brief description of the drawings]

FIG. 1 is a sectional view of one embodiment of a continuous mixing and kneading apparatus according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Raw material input port 2 Transfer screw 3 Rotating shaft 4 Kneading blade 5 Liquid pump 6 Liquid flow meter 7 Liquid supply port 8 Forced transfer blade 9 Variable motor 10 Outlet 11 Flow path restriction plate 12 Transfer casing 13 Kneading casing

Continuing from the front page (72) Inventor Minoru 2209 Aomi, Aomi-cho, Nishikubiki-gun, Niigata Prefecture Examiner, Minoru Torii, in the Aomi Plant of Denki Kagaku Kogyo Co., Ltd. (56) References JP-A-4-97804 (JP, A) Sho-51-89258 (JP, A) Sho-kai 63-144541 (JP, U) Sho-ko 63-21381 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) B01F 7 / 02-7/14

Claims (1)

(57) [Claims] And 1. A feed screw 2 of the material to be mixed which is fed to the transfer casing 12 from the raw material inlet 1 is transferred to the mixing kneading casing 13 is installed in the kneading casing 13, the feed screw 2 coaxially, forced The transfer blade 8 and the kneading blade 4 are installed, and the pitch of the forced transfer blade 8 is shifted.
A continuous mixing and kneading apparatus in which the forced transfer blade 8 is provided at a distance of not more than half the pitch of the feed screw 2 and between the transfer screw 2 and the kneading blade 4.