JPS5936515A - Production of filter element - Google Patents

Abstract

PURPOSE:To enable the extremely easy bonding of curved ends with resin by curving a filter medium to an annular shape and assembling the curved ends thereof to the inside of an internally hollowed jig then injecting a resin material into the jig and curing the resin. CONSTITUTION:A sectorial filter medium impregnated with a phenolic resin is curved to a body folded with concentric crest shapes, and the curved body is heat treated to stabilize the shape. A curved body 2 is assembled in a jig 11 consisting of a lower mold 13 having the crests 13b corresponding to the crests of the body 2 and an upper mold 12 provided with an injection port 15 for a resin material, and the assembly is tightened by means of bolts 14. An urethane resin material is injected through the port 15 to bond the curved ends to each other. When the jig 11 is removed after bonding, the filter element having the bound end parts is obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a filtration element.

The applicant first constructed a plate-shaped furnace material in which the width dimension at one end and the width dimension (1) at the other end were relatively different, and bent this plate-shaped sliding material so that it formed a wave shape between both ends. We have proposed a filtration element that is curved so that one end with a shorter width is on the inside and the other end with a longer width is on the outside, and the curved ends of this curved body are joined to each other.

The present invention aims to provide a method of resin bonding the curved ends together using an extremely simple method.

The present invention will be explained in detail below using specific examples. First, the structure of the filter element will be explained with reference to FIGS. 1 to 3. The furnace material 1 as a whole has a substantially fan-shaped shape, and arc-shaped fold lines 1a having the same center are provided at equal intervals between the arc portion aa' and the arc portion -ni'. When the lubricating material 1 is pulled together on both sides (a'-ni', a-k), a wavy shape is formed on the furnace material 1 by the above-mentioned fold lines, and at the same time, the whole is curved, as shown in Fig. 2. become.

Thereafter, the curved ends of this curved body 2 are joined together to form the filter element 3 shown in FIG. 3. The joint portion 4 is made of resin (2).

Next, the entire manufacturing method including the method of joining the curved ends of the curved body 2 described above will be explained.

As the first step, as shown in Fig. 4, sheet-shaped furnace material A
A fan-shaped furnace material 1 is cut from the sheet. In order to improve the yield of the furnace material 1, cutting is performed in two rows as shown in FIG. The furnace material 1 is made of filter paper and is impregnated with phenol resin.

In the second step, as shown in FIG. 5+a) and fb), reinforcement is applied to the sector-shaped furnace material 1 that has undergone the cutting process. The reinforcement jig 5 is composed of a flat plate 6, a ruler 7 having an i7a in the center, a plurality of rollers 8, and a support 9. The spacing B between the reinforcing bars 9 can be arbitrarily determined by moving the roller 8 along the groove 7a. The ruler 7 rotates around the support 9 as a fulcrum. When this reinforcing material is cut la (folding line 1a in FIG. 1) on the fan-shaped furnace material 1 using the jig 5, each reinforcing material 1 corresponding to each roller 8 is formed.
a becomes a circular arc with the support 9 as the center.

In the third step, the reinforcing bars are folded back according to each reinforcing bar 1J1a of the fan-shaped furnace material (3) 1 that has completed the process. This results in a concentric curved body 2 as shown in FIG.

In the fourth step, since the concentric shape of the curved body 2 shown in FIG. 6 is not stable, heat setting is performed. FIG. 7 shows a heat setting jig 10 used in the heat treatment process. Jig 1
The winter peak 10a of 0 has a concentric circular shape, and corresponds to the winter peak of the concentric curved body 2 in FIG. FIG. 8 shows a state in which the concentric curved body 2 is assembled into the heat treatment jig 10.

Heat treatment is carried out by keeping the state shown in FIG. 8 in a high temperature chamber at about 120° C. for about 30 minutes. As a result, the curved body 2 is adapted to the shape of the jig 10 by the action of the phenol resin impregnated into the paper, and the shape of the curved body 2 is stabilized and the reinforcements generated during the bending process are removed. Correction of wrinkles is made.

The concentric curved body 2 whose shape has been stabilized in the heat treatment process is sent to the next end joining process. The process will be explained with reference to FIGS. 9 to 12.

An example of the end joining jig 11 used in the end joining process is shown in FIGS. 9 and 10. The jig (4) 11 in this example consists of two parts. That is, upper mold 1
2 and the lower mold 3 are tightened with bolts 14. The upper mold 12 is provided with an injection port 15 for a resin material such as urethane foam. As is clear from the lower mold 13 in FIG. 10, the inside is hollow 13a, and this portion becomes the end joint portion shown later. Note that the winter peak 13b corresponds to the winter peak of the concentric curved body 2 described above. Of course, the upper mold 12 also has the same structure as the lower mold 13.

Then, in the fifth step, the end joining jig 11 and the curved body 2 are assembled as shown in FIG. 11. As is clear from FIG. 11, when the bolts 14 are tightened, the joint surfaces between the upper mold 12 and the lower mold 13 and the joint surfaces between the upper and lower molds 12 and 13 and the curved body 2 come into close contact.

In the sixth step, a resin material for producing foamed urethane resin is injected from the injection port 15, and the curved ends 2a (see FIG. 8) of the curved body 2 are joined together with the foamed urethane resin. After passing through such an end joining process, the jig 11 is removed. As a result, as shown in FIG. 12, (5) one filtration element 3 whose ends are joined is obtained.

Reference numeral 4 is an end joint.

In the seventh step, as shown in FIG. 13, the filter element 3 is assembled to the ring-shaped end plate 16 having the support column 16a.
Adhesive is applied to the ring-shaped groove 16b, and the innermost and outermost parts of the concentric filter element 3 are inserted and fixed. As a result, the cross element assembly 17 shown in FIG. 14 is obtained. Note that the assembly 17 can be supported by sandwiching the end plate 16 between the cases.

The present invention is not limited to the above embodiments, and various modifications are possible as described below.

(1) Although the plate-shaped furnace material 1 has a trapezoidal planar shape, for example, a triangular furnace material may be used in which the minus side is infinitely closer to 0 than the other side. Further, the fold line 1a of the furnace material 1 may be formed into a straight line instead of an arc shape. In this case, furnace material 1
is bent into a wavy cross-sectional shape along the fold line 1a, and then the whole is curved.

(2) Furthermore, it is of course possible to create the above-mentioned planar furnace material by folding the furnace material of any shape like origami (6).

(3) The furnace material 1 does not need to be provided with continuous corrugated portions between both ends, and may have a structure in which no corrugated portions are provided in part.

This case is convenient when arranging other functional parts inside the filter body. In addition, the waveform part is triangular, sinusoidal,
Alternatively, various shapes such as a rectangular shape may be considered.

(4) The fold lines of the furnace material 1 do not need to be provided at equal intervals;
Of course, the intervals between the folding lines may be different.

Thereby, the filter body can be formed into a vertical cross-sectional shape.

(5) The top surface of the corrugated part of the filter body is concentric in a flat state, but this can be changed to an eccentric shape by gradually increasing (or decreasing) the interval between the above folding lines between both ends of the furnace material 1. can.

(6) When the curved ends 2a of the curved body 2 are butted against each other and connected using a resin material as shown in FIG. 1) make the sides A'- and A-K of the furnace material 1 uneven.

(7) (7) The material of the connecting part 4 is not limited to polyurethane, but may of course be polypropylene, nylon, or other resins (foamed or non-foamed). Also, synthetic rubber is a resin in a broad sense, so synthetic rubber is used. It may also be configured using

(8) Also, the first step and the second step can be performed simultaneously, and furthermore, the sixth step and the seventh step can be performed simultaneously to integrally mold the joint portion 4 and the end plate 16. Good too.

As described in detail above, the present invention has the advantage that the curved ends of the curved body can be easily joined together.

[Brief explanation of the drawing]

FIG. 2 is a perspective view showing the curved body, FIG. 3 is a perspective view showing the filter element, FIGS. 4 to 14 are views explaining the method for manufacturing the filter element of the present invention in detail, and FIG. A perspective view showing the process, Fig. 5 (al is a perspective view showing the process with oil on the furnace material, Fig. 5 (bl is a front view showing the striped roller), Fig. 6 is a fan-shaped FIG. 7 is a perspective view showing a curved body formed by bending and curving furnace material; FIG. 7 is a perspective view showing a heat treatment jig; FIG. 8 is a perspective view showing the curved body assembled into a heat treatment jig; Figure 9 is a perspective view showing the end joining jig, Figure 10 is a perspective view showing the lower mold of the end joining jig, and Figure 11 shows the state in which the curved end of the curved body is assembled to the end joining jig. 12 is a perspective view showing a filtration element formed by joining the curved ends of the curved bodies, FIG. 13 is a partially cutaway perspective view showing a ring-shaped end plate, and FIG. 14 shows a filtration element assembly. Perspective view.■... Furnace material, 1a... Folding line, 2... Curved body, 2
a...Curved end, 3...Filtering element, 4...Joint portion, 11...Jig. Representative Patent Attorney Takashi Okabe (9) Figure 1 Figure 2 @3 Figure 11 Confucianism 9. f theory

Claims (1)

[Scope of Claims] A plate-like sliding material having a short length at one end and a length at the other end longer than the one end, the furnace material being bent into a wave-shaped cross section between the two ends, and The one end of this furnace material is on the inner peripheral side,
A filtration element is curved in a ring shape so that the other end is on the outer peripheral side, and the curved ends of the curved body are joined to each other, and the step of joining the curved ends of the curved body includes: A method for manufacturing a filtration element, comprising the steps of: assembling the element into a hollow jig, then injecting a resin material into the jig, curing the resin material, and then removing the jig.