JP2023130156A - Method for producing sealant - Google Patents

Abstract

To provide a more simple method for producing sealant with high workability.SOLUTION: A method for producing sealant generated by mixing main agent and curing agent includes: a step of opening part of a surface of a container which is filled with the main agent and forming an opening; a step of injecting the curing agent from the opening into the container; a step of inserting a stirring blade from the opening, and mixing the main agent and the curing agent to produce a kneaded product; a step of closing the opening; a step of forming another opening in another part of the surface of the container; and a step of inserting the stirring blade from another opening to further mixing the kneaded product.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a method of manufacturing a sealant.

For example, in two-component sealants used for aircraft structural components, stirring and defoaming are carried out during manufacturing to suppress corrosion caused by voids formed by air bubbles contained in the sealant, fuel leakage, and the effects of lightning. It may be done.

In particular, in order to perform more reliable stirring and defoaming, in the sealant manufacturing method according to Patent Document 1 below, after mixing the main ingredient and the curing agent, stirring is performed after kneading in advance. Specifically, the kneading operation is generally carried out manually by placing the mixed main ingredient and curing agent on a workbench and using a spatula or the like.

Patent No. 6688757

However, when the kneading work is performed manually as described above, there is a possibility that the worker comes into contact with organic substances contained in the base agent or hardening agent, and organic solvents used for cleaning. Therefore, there has been a need for a method for manufacturing a sealant that is simpler and more workable.

The present disclosure has been made to solve the above problems, and an object of the present disclosure is to provide a method for manufacturing a sealant that is simpler and has higher workability.

In order to solve the above problems, a method for manufacturing a sealant according to the present disclosure is a method for manufacturing a sealant produced by mixing a base agent and a curing agent, the method comprising: forming a part of the surface of a container filled with the base agent; a step of opening the curing agent to form an opening; a step of injecting the curing agent into the interior of the container from the opening; and a step of inserting a stirring blade through the opening to mix the base material and the curing agent. a step of closing the opening, a step of forming another opening in another part of the surface of the container, and inserting the stirring blade from the other opening. and further mixing the kneaded material.

According to the present disclosure, it is possible to provide a method for manufacturing a sealant that is simpler and has higher workability.

1 is a flowchart showing each step of a method for manufacturing a sealant according to an embodiment of the present disclosure. FIG. 2 is a schematic cross-sectional view showing the shape of a container for a main ingredient. FIG. 2 is an explanatory diagram showing a step of forming an opening and mixing using a stirring blade in a sealant manufacturing method according to an embodiment of the present disclosure. FIG. 2 is an explanatory diagram showing a step of closing an opening in a sealant manufacturing method according to an embodiment of the present disclosure. FIG. 7 is an explanatory diagram showing a process of forming another opening in the sealant manufacturing method according to the embodiment of the present disclosure. FIG. 2 is an explanatory diagram showing a step of further mixing a kneaded material in a sealant manufacturing method according to an embodiment of the present disclosure. It is a flow chart showing a modification of the sealant manufacturing method according to the embodiment of the present disclosure. It is a figure which shows the shape of the container of a main ingredient in the modification of the manufacturing method of the sealant based on embodiment of this indication.

(Sealant manufacturing method)
Hereinafter, a method for manufacturing a sealant according to an embodiment of the present disclosure will be described with reference to FIGS. 1 to 6.

This sealant manufacturing method is a method for manufacturing sealants used in aircraft, transportation vehicles, and the like. Sealants are used, for example, to fill gaps between window glass and surrounding walls, or to fill gaps at joints between wall surfaces. A sealant is cured by mixing two liquids, a base agent and a curing agent, at a predetermined ratio, and becomes elastic and rubber-like. As an example, the main agent may be manganese dioxide, and the curing agent may be ethyl acetate.

As shown in FIG. 1, the method for manufacturing a sealant according to the present embodiment includes a step S1 of forming an opening 61 in a container 1 for the base agent, a step S2 of adding a hardening agent, and a step S2 of mixing the base agent and the hardening agent. Step S3 of producing a kneaded material, Step S4 of closing the opening 61, Step S5 of changing the attitude of the container 1, Step S6 of forming another opening 62, and Step S7 of further mixing the kneaded material. , a step S8 of stirring and defoaming, a step S9 of filling the kneaded material into a cartridge, and a step S10 of freezing the kneaded material.

(shape of container)
As shown in FIG. 2, the base agent is prepared in a container 1 filled in advance. As an example, this container 1 includes a circular top surface 10 including a top lid 11, a circular bottom surface 20 provided on the opposite side of the top surface 10, and a cylindrical cylinder connecting these top surface 10 and bottom surface 20 in the central axis direction. It has a surface 30. A shoulder portion 12 is formed around the upper lid 11 to which the upper lid 11 fits. This container 1 is made of metal such as aluminum.

In step S1, an opening 61 for inserting the stirring blade 90 is formed in a part of the surface of the container 1 described above. Specifically, as shown by the broken line in FIG. 2, the upper surface 10 of the container 1 including the shoulder 12 is cut off using a can opener or the like. Thereby, a circular opening 61 is formed above the container 1.

In this state, a pre-measured amount of curing agent is poured into the opening 61 (step S2). Note that the order of these steps S1 and S2 may be changed. That is, it is also possible to inject the curing agent prior to forming the opening 61. Thereafter, as shown in FIG. 3, a stirring blade 90 of a stirring device is inserted through the opening 61 to stir and mix the base resin and the curing agent (step S3). In this step S3, it is desirable to perform stirring and mixing while rotating the stirring blade 90 inside the container 1 and moving it in the vertical direction and the width direction. As a result, the base agent and the curing agent are chemically bonded to produce a kneaded material (sealant).

In this state, as shown in FIG. 3, a stirred region 41 in which the base resin and curing agent are sufficiently mixed and a non-stirred region 42 in which the mixture is insufficient coexist in the container 1. In particular, the non-stirring region 42 is likely to be formed near the bottom surface 20 of the container 1 because it is difficult for the stirring blade 90 to reach there and it is necessary to prevent damage to the container 1 due to contact with the stirring blade 90. Furthermore, since the viscosity of the kneaded product is very high, natural convection due to the fluidity of the kneaded product itself and gravity is difficult to occur, and it is known that a non-stirring region 42 and a stirring region 41 are clearly formed.

Next, as shown in FIG. 4, the opening 61 is closed with the lid 50 (step S4). It is advantageous from the viewpoint of cost and availability that the lid material 50 is made of resin and has a diameter equivalent to the outer diameter of the container 1.

Thereafter, as shown in FIG. 5, the container 1 is turned upside down so that the lid 50 is located at the bottom. That is, the attitude of the container 1 is changed (step S5). As a result, the above-mentioned non-stirring area 42 is located at the upper part of the container 1. Furthermore, in this state, another opening 62 is formed in the bottom surface 20 of the container 1 (that is, the surface facing upward after the attitude has changed) (step S6). In other words, another opening 62 is formed in another part of the surface opposite to the original opening 61 . This step S6 is performed, for example, with a cutting tool such as a can opener. As a result, the bottom surface 20 is completely removed.

Next, as shown in FIG. 6, a stirring blade 90 is inserted into the kneaded material through the other opening 62 to further mix the kneaded material (step S7). In this step S7, the non-stirring region 42 that existed in the original step S3 is stirred from above by the stirring blade 90. As a result, the non-stirring region 42 no longer exists, and the entire interior of the container 1 becomes a stirring region.

Next, the kneaded material is placed in a vacuum stirring and defoaming machine together with the container 1 to perform stirring and defoaming (step S8). Alternatively, the kneaded material may be divided into small portions from container 1 to other containers and placed individually in a vacuum stirring and defoaming machine to perform stirring and defoaming. As a result, voids that existed slightly inside the kneaded material are removed.

Thereafter, the kneaded material in the container 1 is filled into a cartridge prepared in advance (step S9). This step S9 is performed, for example, by installing a cup filled with the kneaded material below the cylindrical cartridge and forcing the kneaded material into the cartridge from the cup.

Finally, the kneaded material filled in the cartridge is frozen by a refrigerator (step S10). The kneaded material is stored in a frozen state, thawed as needed, and used for various operations. With the above, all steps of the sealant manufacturing method according to the present embodiment are completed.

(effect)
Conventionally, in order to further promote the mixing of the base agent and the curing agent, stirring and defoaming have been performed in advance through a process of kneading. Specifically, this kneading work was generally carried out manually using a spatula or the like by placing the mixed mixture of the main ingredient and the curing agent on a workbench.

However, when the kneading work is performed manually as described above, there is a possibility that the worker comes into contact with organic substances contained in the base agent or hardening agent, or with the organic solvent used to clean the workbench. As a result, the kneading work has become a factor that hinders the safety and work efficiency of the entire manufacturing work. Therefore, there has been a need for a method for manufacturing a sealant that is simpler and more workable.

Therefore, in this embodiment, the method described above is adopted. According to the above method, after a kneaded material is generated by inserting and stirring the stirring blade 90 through an opening 61 formed in the container 1, further mixing of the kneaded material is performed from another opening 62. As a result, the non-stirring region 42 (described above) that existed after the first stirring is eliminated by the subsequent stirring. Therefore, a good kneaded product with few voids can be obtained without, for example, taking the kneaded product out onto a workbench and performing manual kneading work. As a result, it is possible to reduce the possibility of exposure to organic solvents and deterioration of workability associated with conventional kneading operations.

Furthermore, the above manufacturing method further includes a step S5 of changing the posture of the container 1 after the step S4 of closing the opening 61, and in the step S6 of forming another opening 62, the opposite side of the opening 61 is closed. Another opening 62 is formed in the surface.

According to this method, after changing the attitude of the container 1, another opening 62 is formed on the opposite side of the initial opening 61. As a result, the region (non-stirring region 42) where the stirring blades 90 could not reach and kneading was insufficient becomes exposed to the outside from the other opening 62 side. By inserting the stirring blade 90 into this non-stirring area 42 from the other opening 62 and performing stirring, the non-stirring area 42 is eliminated and the kneaded material can be kneaded (mixed) more actively. I can do it. As a result, a sealant of even better quality can be obtained. Furthermore, since the worker does not directly touch the kneaded material, work efficiency can be further improved.

Further, in the above manufacturing method, the container 1 has a cylindrical shape having the top surface 10, the bottom surface 20, and the cylindrical surface 30, and in step S1 of forming the opening 61, the opening 61 is formed by removing the top surface 10. However, in step S6 of forming another opening 62, another opening 62 is formed in the bottom surface 20.

According to this method, when the container 1 has a cylindrical shape, that is, has a top surface 10, a bottom surface 20, and a cylindrical surface 30, the stirring blades 90 are inserted from the top surface 10 and the bottom surface 20, respectively. . This makes it possible to work with the top surface 10 or the bottom surface 20 placed on the workbench. In other words, it is possible to efficiently stir and knead while keeping the posture of the container 1 stable. Thereby, workability can be further improved. On the other hand, when the opening 61 is formed in the cylindrical surface 30, it is difficult to maintain the posture of the container 1, which may reduce work efficiency. According to the above method, such a possibility can be reduced.

In addition, the above manufacturing method further includes a step S8 of stirring and defoaming the kneaded material after the step S7 of further mixing the kneaded material.

According to this method, by stirring and defoaming the kneaded material, it is possible to further reduce the voids contained in the kneaded material. Thereby, the quality of the kneaded product can be further improved. Furthermore, since voids are reduced, it becomes possible to precisely control the amount of sealant contained in each cartridge, and it becomes possible to perform work process management and material management more accurately.

Moreover, the above manufacturing method further includes a step S10 of freezing the kneaded material in the cartridge after the step S8 of stirring and defoaming the kneaded material.

According to the above method, by freezing the kneaded product together with the cartridge, it becomes possible to store the kneaded product stably for a long period of time. In addition, since the kneaded material can be thawed and used as needed according to work needs, the amount of kneaded material that is discarded without being used is reduced, further reducing material costs. becomes possible.

(Other embodiments)
Although the embodiment of the present disclosure has been described above in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and may include design changes without departing from the gist of the present disclosure.

For example, the above embodiment has been described on the assumption that the cylindrical container 1 having the top surface 10, the bottom surface 20, and the cylindrical surface 30 is filled with the base agent. However, the shape of the container 1 to which the above manufacturing method can be applied is not limited to a cylindrical shape.

As another example, as shown in FIG. 8, the container 101 may have a rectangular parallelepiped shape or a cubic shape. In this case, after forming an opening 161 on one surface and stirring to generate a kneaded material, another opening 162 is formed on the surface opposite to the one surface. This is desirable. Alternatively, after forming the opening 161 on one surface, the opening 162 may be formed on a surface shifted 90 degrees from the opening 161. As a result, the non-stirring region 42 is eliminated, and the same effects as those described above can be obtained.

Furthermore, in the case of a rectangular parallelepiped or cubic container 1 like the container 101, either side can be placed on the workbench, so as shown in FIG. S5, step S6 of forming another opening 62, and step S7 of further mixing the kneaded material can be repeated multiple times. That is, as shown in FIG. 8, it is possible to further mix the kneaded material by forming an opening 161 and another opening 162 between the two pairs of surfaces. Thereby, the non-stirring region 42 can be eliminated more efficiently. As a result, a sealant of better quality can be obtained.

<Additional notes>
The method for manufacturing the sealant described in each embodiment can be understood, for example, as follows.

(1) The method for manufacturing a sealant according to the first aspect is a method for manufacturing a sealant produced by mixing a base agent and a curing agent, in which a part of the surface of a container 1 filled with the base agent is opened. a step of injecting the curing agent into the container 1 from the opening 61; and a step of inserting a stirring blade 90 from the opening 61 to mix the base material and the curing agent. a step of mixing the kneaded material with the kneaded material, a step of closing the opening 61, a step of forming another opening 62 in another part of the surface of the container 1, and the other opening 62. The step of further mixing the kneaded material by inserting the stirring blade 90 therein is included.

According to the above method, after a kneaded material is generated by inserting and stirring the stirring blade 90 through the opening 61, further mixing of the kneaded material is performed through the other opening 62. Thereby, a good kneaded material with few voids can be obtained without, for example, taking the kneaded material out onto a workbench and performing manual kneading work.

(2) A method for manufacturing a sealant according to a second aspect is the method for manufacturing a sealant according to (1), further including a step of changing the posture of the container 1 after the step of closing the opening 61; In the step of forming another opening 62, the other opening 62 is formed on the surface opposite to the opening 61.

According to the method described above, another opening 62 is formed on the opposite side of the first opening 61 in the container 1 . Thereby, it is possible to actively knead the areas where the stirring blades 90 could not reach and the kneading was insufficient.

(3) The method for manufacturing a sealant according to the third aspect is the method for manufacturing a sealant according to (1) or (2), wherein the container 1 has a cylindrical shape having a top surface 10, a bottom surface 20, and a cylindrical surface 30. None, in the step of forming the opening 61, the opening 61 is formed by removing the top surface 10, and in the step of forming the other opening 62, the other opening 62 is removed on the bottom surface 20. form.

According to the above method, when the container 1 has a cylindrical shape, the stirring blades 90 are inserted from the top surface 10 and the bottom surface 20, respectively. Thereby, it becomes possible to perform kneading efficiently while the posture of the container 1 is stabilized.

(4) A method for manufacturing a sealant according to a fourth aspect is a method for manufacturing a sealant according to any one of aspects (1) to (3), comprising the steps of forming the other opening 62; The step of further mixing the kneaded material is performed multiple times.

According to the above method, the quality of the kneaded product can be further improved by further mixing the kneaded product through the other openings 62 multiple times.

(5) The method for manufacturing a sealant according to a fifth aspect is the method for manufacturing a sealant according to any one of aspects (1) to (4), in which, after the step of further mixing the kneaded material, The method further includes a step of stirring and defoaming the product.

According to the above method, the voids contained in the kneaded product can be further reduced by stirring and defoaming the kneaded product.

(6) The method for manufacturing a sealant according to the sixth aspect is the method for manufacturing a sealant according to (5), which comprises freezing the kneaded material filled in a cartridge after the step of stirring and defoaming the kneaded material. further comprising a step.

According to the above method, by freezing the kneaded product together with the cartridge, it becomes possible to store the kneaded product stably and over a long period of time.

1... Container 10... Top surface 11... Top lid 12... Shoulder 20... Bottom surface 30... Cylindrical surface 41... Stirring area 42... Non-stirring area 50... Lid material 61... Opening 62... Other opening 90... Stirring blade 101... Container 161...Opening 162...Other openings

Claims (6)

A method for producing a sealant produced by mixing a base agent and a curing agent,
a step of opening a part of the surface of the container filled with the base agent to form an opening;
Injecting the hardening agent into the container from the opening;
inserting a stirring blade through the opening to mix the main ingredient and the curing agent to produce a kneaded product;
closing the opening;
forming another opening in another part of the surface of the container;
further mixing the kneaded material by inserting the stirring blade through the other opening;
A method of manufacturing a sealant including. Further comprising the step of changing the attitude of the container after the step of closing the opening,
The method for manufacturing a sealant according to claim 1, wherein in the step of forming the other opening, the other opening is formed on a surface opposite to the opening. The container has a cylindrical shape having a top surface, a bottom surface, and a cylindrical surface,
In the step of forming the opening, the opening is formed by removing the upper surface,
The sealant manufacturing method according to claim 1 or 2, wherein in the step of forming the other opening, the other opening is formed on the bottom surface. The method for manufacturing a sealant according to any one of claims 1 to 3, wherein the step of forming the other opening and the step of further mixing the kneaded material are performed multiple times. The method for manufacturing a sealant according to any one of claims 1 to 4, further comprising a step of stirring and defoaming the kneaded material after the step of further mixing the kneaded material. The method for manufacturing a sealant according to claim 5, further comprising a step of freezing the kneaded material filled in a cartridge after the step of stirring and defoaming the kneaded material.

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