JPH0646537Y2 - Multi-liquid mixing coating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is a multi-liquid mixed coating used for easily mixing, coating, and filling two or more reaction-curable liquids such as a two-liquid curable adhesive. The present invention relates to an apparatus, and more particularly, to a multi-mix coating and filling apparatus in which the mixing section is disposable and the mixing in the injection section is prevented to facilitate the work before and after use.

[Prior Art] Japanese Patent Application Laid-Open No. 59-166232 discloses a conventional multi-liquid mixing coating apparatus.
As also disclosed in Japanese Patent Publication, an injector having a continuous flat surface and an outlet between adjacent resin streams, a roughly cylindrical hole with an inlet end and an outlet end is used to mix woodworking cones. An outflow tube containing a static mixing element having vanes is removably connected to its outlet end so that the mixing vanes are oriented at right angles to the continuous plane of the premixing chamber for the mixing reaction. There is one that is adapted to apply a liquid.

Further, in such a coating apparatus, since it is very important to improve liquid drainage at the nozzle tip when coating is stopped for improving workability, there is a coating apparatus equipped with a liquid dripping prevention suction mechanism.

[Problems to be Solved by the Invention] In the multi-liquid mixing and coating device disclosed in Japanese Patent Laid-Open No. 59-166232, the most efficient mixing is performed from the inlet end of the outflow pipe containing the static mixing element. Therefore, a pre-mixing chamber for performing the most efficient stirring is provided from the first stage of the static mixing element, and reliable mixing is started from the first stage mixing element. . This premixing chamber has a complicated shape because it divides the liquid stream into four or more liquid streams. Therefore, when the outflow pipe is connected to the injector equipped with the liquid drop prevention suction mechanism when the application is stopped, in the premixing chamber, the liquid near the wall surface is removed due to the frictional resistance of the liquid against the partition wall for division. If it is difficult to flow and suction is performed to prevent dripping, the liquid considerably downstream compared to the suction amount will flow back to the injector. At that time, the mixing is surely started in the first-stage mixing blade next to the premixing chamber of the outflow pipe, and in order to prevent the mixed liquid from flowing back to the injector and hardening, It is necessary to provide a pre-mixing chamber with a volume that is several times the suction amount for anti-dripping.

Further, a partition wall for the two liquids is provided as a continuous flat surface on the injector side of the device provided with the conventional suction mechanism, but the two liquids were sucked in to prevent dripping when the coating was stopped. When
The reaction-curable liquid that flows back to the partition wall portion reacts at that portion to become a cured product. In this state, when the outflow pipe is removed, it is impossible to remove the reaction hardened material in the partition wall portion of the injector. If a new outflow pipe is attached without washing the partition wall portion, the hardened material impedes the flow of the liquid, so the partition wall portion must be washed.

The present invention minimizes mixing at the inlet of the disposable outflow pipe so that the injector that detachably connects the outflow pipe does not need to be washed even when the application is stopped for a long time. An object is to provide a multi-liquid mixing coating device.

[Means for Solving the Problems] In order to achieve the above object, in the multi-liquid mixing and applying apparatus of the present invention, two or more liquids are mixed in the liquid inlet portion of the outflow pipe containing the static mixing element. A partition wall for blocking is provided, and this partition wall is formed integrally with the outflow pipe, and the space of the liquid inlet part provided with the partition wall does not mix a liquid having a volume larger than the suction amount for preventing liquid dripping. It has a sufficient volume to remain. Further, as one aspect of the present invention, in the multi-liquid mixing coating device, the partition wall is integrally formed with a thin-walled cylindrical body fitted in the space of the liquid inlet portion in the outflow pipe.

[Operation] The multi-liquid mixing / coating device configured as described above supplies two or more liquids that are reactively hardened in a fixed amount, and mixes and reacts them by the outflow pipe to apply. When the application work is stopped and suction for preventing liquid dripping is performed, a partition wall is provided at the liquid inlet portion of the outflow pipe, and the volume of the liquid inlet portion is larger than the suction amount. The mixed and reaction-cured liquid only returns to the liquid inlet portion and does not flow back to the injector, and the unmixed liquid only returns to the injector and stays at the liquid inlet portion of the outflow pipe. If the outflow pipe is left attached to the injector in this state, the outflow pipe acts as a lid and there is no liquid that can react and harden in the injector, so that even if application is stopped for a long time, the liquid reaction does not occur. Does not proceed. Further, since the part having the partition wall provided in the liquid inlet part is formed integrally with the outflow pipe,
The mixed reaction hardening liquid accumulated in the portion can be removed by removing the outflow pipe. The same applies to the case where the partition wall is integrally formed with a thin-walled cylindrical body fitted in the space of the liquid inlet in the outflow pipe. Therefore, it is not necessary to clean the injector after use, and the next time it is used, you can immediately start the application and filling work by removing the injector outflow pipe and installing a new outflow pipe. .

[Embodiment] An embodiment will be described with reference to the drawings. In the apparatus for multi-liquid mixing and coating according to the present invention, an outflow pipe 2 is joined to an injector 1 in FIG. 1 by an injector 1. At the portion 17, the fixing projection 23 of the outflow pipe 2 is attached by rotationally engaging the fixing projection. Injector 1
As shown in FIG. 2, a joint portion 17 having an outflow portion 19 for discharging the two liquids through a flow path 40 in a separated state, and a dripping prevention suction valve 18 having a liquid inlet 12 of a liquid which can be cured by reaction are provided. It comprises a valve body (11) provided with a piston (20) which is connected to a drooping prevention suction valve (18) and is operated by an adjuster (16) and which has a packing check port (13) and a pilot air port (15). Further, the outflow pipe 2 is provided with an outlet end 21 whose diameter can be adjusted by cutting according to the coating amount in a pipe body made of synthetic resin, and a fixing projection 23, and the liquid inlet 3 is inserted therein. With an inlet end 22 to
As shown in FIG. 2, a static mixing element 4, which is a woodworking cone-shaped plastic molding, is inserted into 24.

As shown in FIG. 3, the liquid inlet portion 3 at the inlet end 22 of the outflow pipe 2 has a plastic wall 31 having an integral partition wall 31 for separating two mixed liquids flowing out from the joint portion 17 of the injector 1. It is a thin-walled body formed as a molded product, and this volume is equal to the mixed suction amount when the mixed liquid remaining in the hole 24 of the outflow pipe 2 is back-flowed by the suction by the sagging prevention suction valve 18. It is large enough to accommodate.

In the apparatus for multi-liquid mixture coating and filling having the above-mentioned configuration, when the coating work is started, the outflow pipe 2 is attached to the joining portion 17 of the injector 1, and the mixture is processed and hardened by mixing. When the obtained two liquids are injected from the liquid inlet 12 of the injector 1, they are sent to the outflow portion 19 via the liquid drop prevention suction valve 18 and the flow path 40.
The two liquids discharged from the outflow portion 19 are not yet mixed by the partition wall 31 in the liquid inlet portion 3 of the outflow pipe 2, and enter the static mixing element 4 in this state, and the static mixing element 4 Since it is divided into a plurality of pieces and has a woodworking pyramid shape, the mixing is repeated and the mixture proceeds to the outlet end 21 and is discharged to be applied and filled in the application / filling portion.

When the application or filling operation is stopped, if the stop time is long, the outflow pipe 2 remains attached as a lid as it is, and when reused, it is removed from the injector 1 by rotating in the opposite direction from the attachment. Before that, in order to make the outlet end of the outflow pipe 2 run out of liquid, the reaction hardening liquid mixed in the hole 24 of the outflow pipe 2 is backflowed by the suction of the dripping prevention suction valve 18, and the outflow pipe 2 However, since the volume of the liquid inlet portion 3 is larger than the volume of this suction amount, the liquid inlet portion 3 stays there.

Accordingly, the mixed reaction-curable liquid is discharged from the outflow portion of the injector 1.
The static mixing element 4 and the liquid inlet 3 are also inexpensive plastic moldings, which do not reach the 19 and the flow path 40 connected thereto, and the outflow pipe 2 filled with the reaction hardening liquid is disposable. As a result, in order to avoid the curing of the backflowed liquid which is required when the conventional one stops the coating operation for a long time in the injector 1, an insufficient flow due to curing does not occur in the next coating operation. So no need to wash.

In the above configuration, the liquid inlet portion 3 is formed by a separate plastic molded product, but it may be molded integrally with the main body of the outflow pipe 2.

In addition, the injector 1 is provided with the drooping prevention suction valve 18 in order to improve the drainage of the outflow pipe 2 when the application is stopped, but the liquid drooping may be prevented by reversing the liquid supply pump.

[Advantages of the Invention] Since the present invention has the configuration as described above, the outflow pipe detachably attached to the injector as a multi-liquid mixing and coating device can be used for a long time when the coating operation is stopped. If there is, it acts as a lid as it is, and is discarded when reused as in the past, but even if it is backflowed by suction to improve drainage at the outlet end of the outflow pipe, it is mixed backflowed. The reaction-curable liquid stays at the liquid inlet of the outflow pipe and does not flow back into the injector by backflow, which eliminates the need for washing the curable liquid due to the mixing required in the conventional apparatus, and is disposable. Since there is no need for a washing time at the end of the coating operation together with a possible outflow pipe, there is an excellent effect that a simple and highly efficient apparatus for coating and filling can be provided.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a multi-liquid mixing and coating apparatus according to an embodiment of the present invention, FIG. 2 is a transverse sectional view of the entire apparatus of FIG. 1 in an assembled state, and FIG. 3 is an inlet of an outflow pipe. It is sectional drawing of the liquid inlet part which consists of a thin wall body inserted in an edge. 1 ... injector, 2 ... outflow pipe, 3 ... liquid inlet, 4 ...
Static mixing element, 31 ... Partition wall.

Claims (2)

[Scope of utility model registration request] 1. An injector for quantitatively supplying two or more liquids capable of reaction curing, and the injector which is detachably connected to the injector.
An outflow tube having a static mixing element for mixing and reacting two liquids, and applying the mixed and reacted liquids, and sucking two liquids so as to prevent dripping when the application is stopped. In the multi-liquid mixing and applying apparatus, a partition wall for preventing mixing of the two liquids is provided at the liquid inlet portion of the outflow pipe, the partition wall is formed integrally with the outflow pipe, and the liquid inlet having the partition wall is provided. A multi-liquid mixing and coating device, characterized in that the space of the part has a volume such that a liquid having a volume larger than the suction amount for preventing the liquid dripping remains without being mixed. 2. The utility model registration claim 1, wherein the partition wall is integrally formed with a thin-walled cylindrical body fitted in the space of the liquid inlet portion. Liquid mixing and coating device.