JPH039995B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to a method of forming a seal portion. [Description of Prior Art] Conventionally, as a method for forming a seal portion of a fitting frame material constituting a window frame, a door, etc., the following methods are known. An adhesive sealant that is larger than the end face shape of one of the joinery frame materials to be connected and formed in a similar shape to the end face shape is applied to the end face of one of the joinery frame materials of the joint part, and both frames are connected. A method of forming a seal by bringing materials into contact. A method in which a liquid sealant is applied to one of the joining frame materials to be connected, and after the two frame materials are brought into contact, the applied sealant is allowed to naturally harden to form a sealant having flexibility and elasticity. A method such as transferring a photocurable or thermosetting sealant to the end face of one of the connecting parts of two fittings frame materials and applying light or heat to the transferred sealant to form a sealed part. be. However, each of these conventional methods of forming a seal portion has the following problems. In other words, the method of forming a seal by applying an adhesive sealant to the end face or flat surface of one of the fitting frame materials of the connecting part requires an extra sealant, which increases the cost. In addition, since it is necessary to align the two fitting frames when connecting two fitting frames, the workability is poor, and if there is a mistake in applying the sealant, the sealing performance will be impaired, and the aesthetic appearance of the joint will be affected. There were problems such as damage to the product. In addition, the method of forming a seal by applying a liquid sealant to the end face of one of the joint frame materials to be connected requires a large-scale application device, and the formed seal The thickness of the parts was uneven, making it difficult to form a uniform sealant layer. In addition, in the method of forming a seal by transferring a sealant to the end surface of one of the joints of two fittings frame materials, the sealant drips during the curing stage and is not uniform. It was difficult to form a suitable sealing layer. [Object of the Invention] The present invention was devised in view of such conventional problems, and has excellent sealing properties, and
It is an object of the present invention to provide a method for forming a seal part, which is easy to form, has high mass productivity, and does not impair the beauty of a connecting part. [Summary of the Invention] In order to achieve the above object, the present invention prepares a transparent pattern molded plate having a pattern substantially the same as the shape of the surface to be sealed, and A photocurable resin is disposed to a large thickness, and the transparent pattern and the surface to be sealed are placed opposite to each other at a predetermined interval in such a manner that the surface to be sealed of the member to be sealed is in contact with or immersed in the resin, and the surface to be sealed is made to face the transparent pattern and the surface to be sealed. A member is arranged, and light is irradiated from the other side of the transparent plate to form a sealed portion of a predetermined thickness on the sealed surface, and the sealed portion is formed by skillfully utilizing the properties of the photocurable resin. It was decided to. [Description of Examples] Hereinafter, examples of the present invention will be described using an example in which the member to be sealed is an aluminum sash. First, the formulation of the ultraviolet curable resin composition used in this example is as shown in the following table. In addition, the physical properties after curing are also explained. Hereinafter, the uncured assembled product will be referred to as assembled product A, and the cured product will be referred to as cured product B.

【table】

[Table] The method for forming the seal portion is performed according to the following steps I to V. A transparent pattern molded plate is prepared that allows ultraviolet rays to pass through only the transparent pattern portion of the seal portion. An example of a transparent pattern molded plate is shown in FIGS. 1 and 2. FIG. 1 is a plan view, and FIG. 2 is a sectional view of one side. The transparent pattern molded plate 1 is made of a transparent plastic plate or other film, and is painted black except for the transparent pattern 3 in the sealed portion to form a non-transparent portion 5. In addition to this, the transparent pattern molded plate 1 can also be created by punching out the transparent pattern 3 on a non-transparent plate.In short, as long as only the molded pattern 3 portion of the seal portion is made to be transparent to ultraviolet rays. good. The composition A is placed on one side of the transparent pattern molded plate 1 to a desired thickness. For this reason, in this example, the plan view is shown in FIG.
A composition container shown in one side view in FIG. 4 was prepared. The composition container 7 has a rim 11 around the periphery of the transparent plate 9.
is provided, and the composition A is applied to the area surrounded by this edge 11.
can be stored at a desired depth D. This depth D is a value larger than the thickness d of the seal portion to be formed. It goes without saying that the transparent plate 9 and edge 11 of the composition container 7 shown in FIGS. 3 and 4 may be integrally molded from a transparent material. Then, the transparent pattern forming plate 1 is attached to the bottom surface of the container 7. This makes it possible to obtain a cured product having the same shape as the transparent pattern on the opposite surface to which the ultraviolet rays have been irradiated, by applying ultraviolet rays from the bottom of a container containing the composition at a desired depth D. Alternatively, the transparent plate 9 and the transparent pattern molded plate 1 may be molded as one body, leaving only the transparent pattern 3 and painting the others black. Further, the transparent plate 9 and the transparent pattern molded plate 1 are integrally molded from a transparent material, a groove is formed at a position corresponding to the transparent pattern 3, and a predetermined thickness D is formed in the groove.
can be filled with photocurable resin. In this case, parts other than the transparent pattern also become transparent, but there is no particular problem because the photocurable resin to be filled is located within the groove. Even in this case, it goes without saying that parts other than the grooves may be painted black. Note that the cross-sectional shape of the groove portion may be arbitrary, but preferably
As shown in FIG. 8 or 8, it is suitable that the opening extends toward the opening or is parallel to the opening. In FIGS. 7 and 8, the groove portion is designated by the reference symbol V. Furthermore, a release film made of polyethylene, polypropylene, or the like may be applied to at least the transparent pattern portion of the transparent pattern molded plate 1 in order to facilitate release of the photocurable resin after curing. Next, the end face (for example, the lower end face) of the member to be sealed (the vertical frame of the aluminum sash) is placed in the composition A filled in the container 7 to the depth D, and the end face is The shape pattern and the transparent pattern are arranged to match each other. FIG. 5 shows the arrangement in a side view. Sash 13 is being transported by robot hand RH. In addition, in this example, the container 7 is attached to the base 15.
placed horizontally on top. As shown in the lower part of FIG. 5, ultraviolet rays 17 are irradiated from below the transparent pattern forming plate 1 for a predetermined period of time. As a result, a seal portion having a predetermined thickness d is formed in alignment with the transparent pattern on the end surface of the sash 13. After that, the robot hand RH lifts the sash 13 a little and then transports the sash 13 to a predetermined location. At this time, uncured composition A is attached to the outer periphery of the seal formed on the end face of the sash, but the uncured composition A is stopped for a few seconds when the robot hand RH is slightly lifted. At this point, the remaining composition A may be allowed to hang down, and then moved intermediately to a desired position, where ultraviolet rays may be applied again to completely cure the remaining composition A. Further, a step of wiping off the remaining composition A may be inserted during this process. However, if the transparent pattern shown in FIG. 7 or 8 is used, this effort is almost unnecessary. As described above, the sash 13 having a seal portion formed on its end face is assembled with the horizontal frame 19 of the aluminum sash using screws or the like, as shown in FIG.
The seal portion is indicated by S, and the cured product is indicated by B. The light (ultraviolet) curable resin that can be used in the present invention preferably has a hardness of the hardened product of Shore A of 90 or less. If the shore A is higher than 90, sufficient sealing performance cannot be obtained because the surface pressure sufficient to compensate for the tolerance of the fitting frame material cannot be obtained. Shore A90
In the following cases, even if there are tolerances in the fitting frame material, sufficient sealing performance can be obtained because the cured product is deformed by the tightening surface pressure during connection. Furthermore, more preferably,
Shore A20-60. Examples of ultraviolet curable resin compositions include the following formulations. That is, any known acrylic oligomer may be used, but examples include urethane acrylate, epoxy acrylate, polyalkylene glycol acrylate, and polyester acrylate. Further, as the acrylic monomer, any known monomer may be used, but examples include hydroxyethyl acrylate, phenoxyethyl acrylate, ethoxyethoxybuteracrylate, dicyclopentadiene ethoxy acrylate, and 2-hydroxy-3-phenyl acrylate. These include enoxypropyl acrylate, benzyl acrylate, tetrafurfuryl acrylate, 2-ethylhexyl acrylate, and their methacrylates. The photosensitizer may be any known photosensitizer; examples include benzyl, benzoin, benzoin methyl ether, benzoin isopropyl ether, thioxanthone, methyl orthobenzyl benzoate, and azobisisobutylene. Examples include lonitrile, diethoxyacetophenone, and the like. Further, as the filler, any filler that easily transmits ultraviolet light may be used, but a silica filler is most suitable. In addition, as stabilizers, polymerization inhibitors,
Colorants, anti-aging agents, etc. may be added as necessary. In addition, in the case where the member to be sealed is placed horizontally and the photocurable resin is applied to the lateral end surface thereof, the photocurable resin must be arranged vertically.
In this case, if the thixotropic ratio of the ultraviolet curable resin is 2 or less, it will sag and cannot be used. Therefore,
In such a case, the thixotropic ratio needs to be 2 or more, preferably 4 to 7. [Effects of the Invention] As is clear from the above explanation, according to the method of the present invention, the end face of the seal portion has smoothness and can be adjusted to a desired thickness, so that sealing performance can be improved. Can be done. Furthermore, since a photocurable composition can be used as the sealant, the curing process is quick.
Furthermore, since no complicated equipment is required compared to conventional methods, the sealing portion can be formed easily and mass productivity can be improved. Furthermore, since the seal part can be made uniformly to match the transparent pattern, the sealing performance is good, and there is no wastage of sealant, reducing costs, and the effect is that the beauty of the connecting part is not spoiled. is obtained.

[Brief explanation of the drawing]

The drawings all show examples, and FIG. 1 is a plan view of the molding pattern of the sealing part, FIG. 2 is a side view thereof, FIG. 3 is a plan view of the composition container, and FIG. 4 is a side sectional view thereof. FIG. 5 is an explanatory diagram showing one form during the adhesion process, and FIG. 6 is an explanatory diagram of the assembled state of the aluminum sash. FIGS. 7 and 8 are cross-sectional explanatory views showing other embodiments of the transparent patterned plate, respectively. DESCRIPTION OF SYMBOLS 1... Transparent pattern molded plate, 3... Transparent pattern, 5... Non-transparent part, 7... Composition container, 9...
Transparent plate, 13... Vertical frame of the sash, 17... Ultraviolet light, A... Uncured composition, B... Cured composition,
V...Groove, S...Seal part, RH...Robot hand.

Claims (1)

[Claims] 1. Prepare a transparent pattern molded plate having a transparent pattern that is approximately the same shape as the surface to be sealed, arrange a photocurable resin on one side of the molded plate to a thickness greater than the thickness of the seal portion to be molded, and apply the resin. The member to be sealed is disposed with the transparent pattern and the surface to be sealed facing each other at a predetermined interval in such a manner that the surface to be sealed of the member to be sealed is in contact with or immersed in the molded plate, and light is emitted from the other side of the molded plate. A method for forming a seal portion, characterized in that a seal portion having a predetermined thickness is formed on the surface to be sealed by irradiating with.