JPS6338290B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing an adhesive. magnetic material,
Processing and assembly of thin sheet materials such as dielectrics and piezoelectrics often requires a bonding process. Conventionally, in order to obtain a thin adhesive layer when manufacturing these adhesives, methods such as tightening the object with a vise or placing a heavy object on the object were used, but it was not possible to obtain a uniform and uniform adhesive layer. Moreover, it is difficult to obtain a thin adhesive layer, and variations occur in the processing and assembly steps after adhesion, and improvements have been desired in the production of precision parts. The present invention aims to propose a method for producing an adhesive that does not have these drawbacks and can provide a uniform and thin adhesive layer.

The method for producing an adhesive of the present invention includes applying a mold release treatment to the inner wall of a fixing metal fitting, storing an adhered object overlapped with an adhesive in the fixing metal fitting, and providing a pressing part at one end of the adhesive. A threaded rod member provided inside with a spring that biases and supports the pressing part is screwed through the wall plate of the fixture, and the object to be adhered is pressed and bonded by the threaded rod member, Examples thereof will be described below with reference to the drawings.

In FIG. 1, numerals 1 and 2 are objects to be adhered which are overlapped with an uncured adhesive 3 interposed therebetween. The overlapping objects 1 and 2 to be adhered are housed in a box-shaped fixture 4 as shown in FIG. The fixture 4 is provided with a threaded rod 5 that is screwed through the center of the top plate 4a. The threaded rod 5 has a cylindrical shape and has a spring 6 attached therein.
A steel ball 7 that presses the objects 1 and 2 to be adhered is supported by a spring 6 so as to be retractable from the lower end of the threaded rod 5. Furthermore, a release agent 8 is applied to the inner wall of the fixture 4 to prevent it from sticking to the inner wall surface when the adhesive 3 between the objects 1 and 2 flows out. The overlapping adherends 1 and 2 housed in the fixture 4 are pressed against the center of the upper surface by the lower steel ball 7 by tightening the threaded rod 5. The threaded rod 5 is selected with an appropriate spring 6 depending on the size of the objects 1 and 2 to be adhered or the required pressing force.
If the upper surfaces of the objects 1 and 2 are large, a plurality of threaded rods 5 are used so that the required pressing force is evenly applied to the upper surfaces of the objects.

Next, a specific example will be described. A pair of piezoelectric ceramic plates measuring 5 mm and 10 mm in length and width and 2 mm and 4 mm in thickness were bonded together using an epoxy adhesive with a curing temperature of 80°C. The mold release treatment was performed by pasting a fluororesin tape to the inner wall of the fixture. Ceramic plates stacked together with adhesive were pressed using a threaded rod with a diameter of 5 mm in a fixture heated to 85°C, and kept warm for 30 minutes.
After cooling slowly in air, a piezoelectric material having a uniform and thin cured adhesive layer of 3 μm was obtained. It was also easy to take out the piezoelectric body from the fixture. As another method for the mold release treatment, a liquid prepared by dissolving a fluorocarbon resin in a solvent was applied to the inner wall of the fixture, but similar results were obtained.

According to the method for manufacturing an adhesive of the present invention, the objects to be adhered overlapped with each other via an adhesive are accommodated in a fixing fitting, and the objects to be adhered are pressed by a threaded rod member having a pressing portion and a spring inside. The work is extremely simple, and since the pressing part at one end of the threaded rod member is supported by a spring, it is possible to almost eliminate the difference in pressing force due to variations in how the screws are tightened, and it is possible to use the threaded rod member with an appropriate spring. By selecting the correct adhesive, it is possible to always press the object to be adhered with an accurate pressing force, and a bonded object with a uniform and thin adhesive layer can be obtained. In addition, since the inner wall of the mold is subjected to a release treatment, it is easy to remove the adhesive from the fixing fitting after adhesion is completed.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a perspective view of objects to be adhered superimposed via an adhesive, and FIG. 2 is a sectional view of a fixing fitting showing the adhesion process. 1, 2...Object to be adhered, 3...Adhesive, 4...Fixing metal fittings, 4a...Top plate, 5...Threaded rod, 6...Spring, 7...Steel ball, 8...Release agent .

Claims (1)

[Scope of Claims] 1. The inner wall of the fixing fitting is subjected to a mold release treatment, and the adhered object is stored in the fixing fitting via an adhesive, and a pressing part is provided at one end, and the pressing part is A threaded rod member having a biasing and supporting spring provided therein is penetrated and screwed into the wall plate of the fixing fitting;
A method for producing an adhesive article, in which the article to be adhered is pressed and adhered by this threaded rod member. 2. The method for producing an adhesive according to claim 1, wherein the mold release treatment is performed using a fluororesin tape. 3. The method for manufacturing an adhesive according to claim 1, wherein the mold release treatment is performed by applying a liquid prepared by dissolving a fluorocarbon resin in a solvent.