JPS6147125B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to, for example, a method for manufacturing an air filter for supplying clean air to a replaceable magnetic disk drive device, and allows the filter to be manufactured at low cost, easily, and with high reliability. .

With the miniaturization of electronic computer bodies, the memory, which is one of the peripheral devices, is being sought to be made as small as possible in the above-mentioned magnetic disk memory drive device. These are based on the effective use of office floors. Accordingly, the various components incorporated into the equipment are also being designed to be more compact, but in the case of air filters, the filtration area cannot usually be reduced in order to ensure the amount of air supplied. The reason for this is the need to lower the temperature inside the device. Further, due to the miniaturization, the outer shape of the air filter is cylindrical due to these restrictions due to the arrangement of various parts. In this respect, air filters have manufacturing difficulties in assembling and inserting the filter element into the frame, and it is also difficult to inject the adhesive, which often results in the adhesive not penetrating sufficiently between the frame and the cut edge of the filter element, causing air to leak. induces leakage. This result, for example, will cause a serious defect in a high-performance filter with a dust contamination rate of 0.5μ particle size or less of 0.03%, making it unusable. On the other hand, as a result of emphasizing reliability, the conventional design concept requires that the frame be a rigid body, so for example, an integral cylindrical shape made of synthetic resin with a wall thickness of 3 m/m and a length of 400 m/m is often used, so the frame is quite rigid. It is expensive in itself. As can be seen from the above explanation, air filters are expensive as finished products due to manufacturing difficulties and the high cost of the outer frame, but maintenance costs are also high because the filtration elements often become clogged with dust and must be replaced. Becomes expensive.

The present invention has been made in view of these points, and as described above, it is an object of the present invention to provide a method of manufacturing an air filter at low cost and with high reliability.

An embodiment of the present invention will be described above with reference to the drawings.

First, the manufacturing means, order, and structure will be explained with reference to FIG. 1. 1 is a filter paper for air filtration. Reference numeral 2 designates one jig for forming and maintaining the filter paper 1 in a meandering shape as shown in the figure. 3 is a similar jig, and these jigs 2 and 3 are fixed to the base 4 with bolts 15. 5 is a film sheet which is the subject matter of the present invention, and is made of non-porous material such as nylon, vinyl,
It is made of cellophane, rubber, etc.

The above description is an outline of the configuration, but the assembly and manufacturing procedure will now be explained. Before fixing the aforementioned jigs 2 and 3 to the aforementioned base 4, the sheet 5 is placed on the base 4. Thereafter, for example, an epoxy casting adhesive is injected into the comb-shaped gap between the jigs 2 and 3. Next, filter paper 1 is inserted into the gap in the direction of arrow A and adhered to sheet 5. The same adhesive is applied to the cut ends 6 and 7 of the filter paper in the longitudinal direction, and 1 is also shown by the two-dot chain line on the sheet 5.
After applying the same adhesive on parts 3 and 14, jig 2,
The sheet 5 is folded toward the side surfaces 16, 17, 18, and 19 of the sheet 3. Next, the same adhesive is applied to the upper surface side 8 of the filter paper 1 and both end surfaces of the comb-shaped portions of the jigs 2 and 3, avoiding the surfaces 11 and 12 on the jigs 2 and 3 in the figure. The reason for this is that if the adhesive is applied to the inner surface of the end surface 20 of the sheet 5 that serves as the air supply and exhaust ports, or if it flows, it will cause problems in connecting the ducts, etc. to both ports, and as shown in FIG. This is because such bending causes trouble in forming the flange portion. Details of the comb-shaped portions of the jigs 2 and 3 to prevent this leakage will be described later.

Next, the end surface 20 of the sheet 5 is aligned with the groove ends 9, 10 of the jigs 2, 3, and the sheet 5 is folded and bonded. After the adhesive has hardened, the bolt 15 is removed and the jigs 2 and 3 are pulled out in the direction of arrows B and C.

FIG. 2 shows the completed air filter product completed with the above explanation, and the cut 2 in the longitudinal direction of the sheet 5
1, it goes without saying that the adhesive described above can be further applied to form a sufficient sheet. In order to make it easier to connect the finished air filter to a mounting device, it will be even more convenient if one end 20 of the sheet 5 is bent in a ripe shape as shown in FIG. 3. If the sheet 5 is to be used as it is in the shape shown in Figure 2, use heat-shrinkable resin as the material for the sheet 5, cover both ends of the rectangular pipe inside the device, and perform sealing by shrinkage, for example, by blowing hot air using an air dryer. joining parts,
In addition, the number of man-hours can be omitted, making it even more convenient.

The details of joining the sheet 5 and the filter paper 1, which are omitted in the explanations of FIGS. 1 to 3, will be described with a part shown in FIG. 4. The combing parts of the jigs 2 and 3 are Notches 22 at the top and bottom of the entire length of the comb.
have. Therefore, the injected epoxy adhesive will not flow out to other parts unnecessarily. Also, for convenience of illustration, the base and tip of the comb parts of jigs 2 and 3 are shown as square in Figure 1, but both are rounded and devised to minimize the gap between them and the filter paper 1. Therefore, there is no leakage of the injection agent. It goes without saying that it is convenient to use a material for the jig that has good mold releasability, such as a fluorocarbon resin known under the registered trademark of Teflon. or,
If the sheet 5 is made of a transparent material, the adhesive interface can be visually observed and defects can be easily detected and repaired. In this embodiment, the usage of the synthetic resin sheet 5 was mainly described, but for example,
There is no argument that thin aluminum sheets of approximately 0.3 m/m can also be used in the same way.

Note that the upper and lower end surfaces of the notch 22, the ready surface 11, and the cut end surface of the filter paper 1 are shown to coincide with each other in the figure, but they are not necessarily as shown in the figure, and the jigs 2, 3
It goes without saying that the comb portion may be lower than the surface 11 by, for example, 1 m/m so that the upper and lower cut ends of the filter paper 1 can be firmly adhered to the sheet 5.

The air filter manufactured according to the present invention is made of a so-called separator, which is made of ordinary paper or a plastic sheet, or even a thin aluminum plate to maintain the spacing in order to accurately maintain the meandering spacing of the filter paper 1 after completion. Although the spacer is not shown,
After removing the jigs 2 and 3, inserting them is no different from conventional products.The spacer usually has a triangular wave shape in cross section.

In addition, by streamlining the production method without using an expensive support frame, it was necessary to wait for one side to harden before applying the other, but this was no longer necessary and everything was completed in one process, making it extremely difficult to bond the filter paper. It became possible to produce it cheaply.

As described above, according to the present invention, it is possible to manufacture an air filter at low cost and with high reliability, eliminating the conventional drawbacks.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the present invention and shows the structure and manufacturing procedure, Fig. 2 is a perspective view of a finished product according to an embodiment of the present invention, and Fig. 3 is a side view of the same finished product. FIG. 4 is a partial sectional view as a supplementary explanation of FIG. 1. In the figure, 1 is filter paper, 2 and 3 are assembly jigs,
4 is the base of jigs 2 and 3, and 5 is a film sheet. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] 1. Fold back the sheet air filtration element in a meandering manner at predetermined intervals, wrap a non-porous, thin material so as to tightly contact both side end surfaces and the longitudinal end of the sheet air filtration element, and combine this thin material with the above-mentioned material. The filter element is characterized in that both end surfaces and both ends of the filtration element and the overlapping parts of the thin material are bonded with an adhesive, so that the wrapped part of the thin material is formed as a cylindrical support. A method of manufacturing an air filter.