JPH0595609U - Insert molded product - Google Patents

Abstract

(57) [Summary] [Purpose] To improve oil permeability and dust capture. [Structure] A mold is formed in an appropriate shape, and a peripheral portion 2 of a filter medium 1 mounted in the mold and a minute portion 3 continuous with the peripheral portion 2 and a predetermined width between the peripheral portions 2 and 2 are formed in a cross shape. The crushing rate of the central portion 6 and the minute portions 7 and 7 continuous to the central portion 6 connected by is set to be larger than that of the portion 4 which is not embedded in the frame portion 8, that is, the portion which becomes the filtering portion 4 after molding. Since the crushing rate in this case is set to 70 to 80%, when the molding material is injected into the mold, a part thereof does not flow into the part that becomes the filtering part 4 of the filtering material 1. As a result, it is possible to secure the filtering portion 4 of the molded product in an effective area as designed, and the oil permeability and the dust trapping property are improved.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an insert-molded product which is effective as a filter material for an automobile oil strainer and the like, and more particularly to an insert-molded product which uses a non-woven fabric as a filter material and is excellent in oil permeability and dust trapping property.

[0002]

[Prior art and its problems]

 Generally, various types of filter materials such as oil strainers for automobiles are used. For example, an insert molded article using a nonwoven fabric as the filter material 11 as shown in FIGS. 3 and 4 is already known. ing.

That is, in this insert-molded product, a filter material 11 made of a non-woven fabric formed in a flat plate shape is mounted at a predetermined position in the mold 20, and the mold material 20 is clamped to remove the filter material 11 from the mold. The filter material 11 is appropriately crushed uniformly with a crushing rate of about 50%, and in this state, a molding material such as a molten resin is injected into the mold 20 and solidified, so that an appropriate portion 12 of the filter medium 11 is crushed. The frame 18 is embedded and fixed in a frame portion 18 made of resin or the like formed in a grid pattern.

Then, by using the insert-molded product configured as described above as a filtering material for an oil strainer of an automobile, dust such as metal pieces and dust mixed in the oil is filtered, and thereby, the engine. It is possible to prevent accelerated wear of the sliding parts.

However, in the conventional insert-molded product configured as described above, the filter material 11 was crushed uniformly in the mold 20 at a crushing rate of about 50% during molding. Although the molten molding material is injected into the mold 20 above, the porosity of the filter medium 11 cannot be completely eliminated with a crushing rate of about 50%. Therefore, when the molding material is injected, a part of the molding material flows into the part 14 that is not embedded in the frame portion 18 of the filtering material 11, that is, the part that functions as the filtering part 14 after molding, and the flowing molding material As shown in FIG. 4, it solidifies and blocks a part of the filter portion 14 of the filter medium 11. As a result, the effective area of the filter portion 14 of the filter material 11 is reduced, and the functions such as oil permeability and dust trapping property are significantly reduced.

Further, since the flow of the molding material becomes uneven, the flow pattern after the completion of molding becomes uneven, and it becomes impossible to judge the quality of the molded product based on the flow pattern.

On the other hand, in order to solve the above problems, the crushing rate of the filter medium 11 is set to 70 to 80% to completely eliminate the porosity of the filter medium 11 to form a molding material. When pouring, it may be possible to prevent a part of the molding material from flowing into the filtration portion 14 of the filtration medium 11. However, in this case, since the crushing rate is too large, the filtration medium 11 is not formed before molding. Cannot be returned to the thickness of 100%, and the oil permeability and dust trapping property will be significantly reduced.

This invention solves the above-mentioned problems of the conventional ones, and when pouring the molding material, a part of the molding material is not embedded in the frame portion of the filter, that is, after molding. By blocking the flow into the part that will be the filter part, it is possible to prevent the effective area of the filter part of the filter material from decreasing, and also to allow the thickness of the filter part of the filter material to return to the thickness before molding after molding. The purpose of the present invention is to provide an insert-molded product that can improve performance such as oil permeability and dust trapping property.

[0009]

[Means for solving problems]

 In order to solve the above-mentioned problems, the present invention comprises a frame part formed in an appropriate shape, and a filter material in which at least a peripheral edge part is embedded in the frame part, which is embedded in the frame part of the filter material. The crushing rate of the peripheral portion and the minute portion continuous to it is made larger than that of the portion not embedded in the frame portion, and the minute portion continuous to the peripheral portion and the frame portion embedded in the frame portion are embedded. It employs a means in which the boundary portion of the portion which is not formed is formed into an appropriate curved surface. Further, the crushing rate of the peripheral portion embedded in the frame portion of the filter material and the minute portion continuous thereto is 70 to 80%, and the frame portion is made of resin. At the same time, the filter material employs a means made of non-woven fabric.

[0010]

[Action]

 This device adopts the above-mentioned means to make the crushing rate of the part embedded in the frame part of the filter medium and the minute part continuous to it larger than that of the part not embedded in the frame part. When the molding material is injected at the time of molding, a part of the molding material does not flow into a portion that is not embedded in the frame portion of the filter medium. Furthermore, since the part of the filter material that is not embedded in the frame part can return to its original thickness after molding, the effective area of the part that will be the filter part of the filter material does not decrease after molding, and it is as designed. The effective area can be secured.

[0011]

【Example】

 An embodiment of the present invention shown in the drawings will be described below. 1 and 2 show an embodiment of an insert-molded product according to the present invention, FIG. 1 is a perspective view showing the whole, and FIG. 2 is a sectional view taken along the line XX of FIG.

That is, in this insert-molded product, the filter medium 1 made of a non-woven fabric having a desired thickness and formed in a flat plate shape is mounted at a predetermined position in a mold (not shown), and the mold is clamped. As a result, the peripheral edge portion 2 of the filter medium 1 and the minute portion 3 continuous therewith, the central portion 6 connecting the peripheral edge portions 2 and 2 with a predetermined width in a cross shape, and the minute portion 7 continuous therewith, 7 is crushed at an appropriate crushing rate, and in this state, a molding material composed of molten resin is poured into the mold to solidify it, and a resin in the shape of a grid is formed inside the mold. A frame portion 8 is formed, and a peripheral portion 2 of the filter medium 1 and a central portion 6 connecting the peripheral portions 2 and 2 with a predetermined width in a cross shape are embedded and fixed in the frame portion 8.

Crushing of the peripheral portion 2 of the filter material 1 and the minute portion 3 continuous with it, and the central portion 6 connecting the peripheral portions 2 and 2 with a predetermined width in a cross shape and the minute portions 7 and 7 continuous therewith The ratio is set to 70 to 80%, and when the thickness of the filter medium 1 before forming is A, the peripheral edge portion 2 of the filter medium 1 and the minute portion 3 continuous thereto, and the peripheral edge portions 2, 2 The thickness B of the central portion 6 connecting the spaces in a cross shape with a predetermined width and the minute portions 7 and 7 continuous to the central portion 6 is represented by (0.2 to 0.3) A. The width of each of the minute portions 3 and 7 was set to about 5 mm.

A boundary portion 5 between each of the minute portions 3 and 7 of the filter medium 1 and the portion 4 which is not embedded in the frame portion 8 is formed into an appropriate smooth curved surface which is recessed inward of the filter medium 1, This makes it possible to appropriately disperse the stress acting on the boundary portion 5 during use.

In the insert-molded product according to this embodiment having the above-described structure, the peripheral portion of the filter medium 1 to be mounted in the mold is formed by forming the mold into an appropriate size and shape. 2 and the minute portion 3 continuous thereto, and the crushing rate of the central portion 6 connecting the peripheral portions 2 and 2 in a cross shape with a predetermined width and the minute portions 7 and 7 continuous thereto, and The value which can prevent the molten molding material from flowing out in the direction of the portion 4 which is not embedded in the frame portion 8, that is, 70 to 80%, and the frame portion of the filter medium 1 is set. Since the portion 4 that is not embedded in 8 is assured of the thickness before molding, even when the molding is completed, when the molten molding material is injected into the mold, a part of the portion is the frame of the filter medium 1. The part 4 that is not embedded in the part 8, After molding, it will not flow into the part that will become the filtering part 4.

Therefore, unlike the conventional case, a part of the molding material flows in and solidifies to reduce the effective area of the filter portion 4 of the filter medium 1, and the effective area of the filter portion 4 of the filter medium 1 does not decrease. Since the value can be set as designed, the expected performance such as oil permeability and dust trapping performance can be obtained.

Further, by forming the boundary portion 5 between each of the minute portions 3 and 7 of the filter medium 1 and the portion 4 which is not embedded in the frame portion 8 into an appropriate curved surface, it is intended to act on the boundary portion 5 during use. It is possible to disperse the stress to an appropriate degree, and as a result, the stress is not locally concentrated, so that the durability is significantly improved.

In the above description, the frame 8 is made of resin and the filter material 1 is made of non-woven fabric. However, the invention is not limited to these, and the frame 8 or the filter material 1 may be made of other materials. It may be formed.

[0019]

[Effect of the device]

 This invention is configured as described above, and the crushing rate of the portion embedded in the frame portion of the filter medium and the minute portion continuous to the frame portion is set to be larger than that of the portion not embedded in the frame portion. When injecting the material, a part of the material does not flow into a portion that is not buried in the frame portion of the filter medium, that is, a portion that will later become the filter portion. Therefore, it is possible to set the filtration area of the filter material to the effective area as designed, and obtain the desired performance such as oil permeability and dust trapping property. In addition, by forming the boundary between each minute part of the filter material and the part not embedded in the frame part in an appropriate curved surface, it is possible to appropriately disperse the stress acting on that part during use, As a result, the stress is not locally concentrated, and the durability is significantly improved. Therefore, when it is used as a filter for an automobile oil strainer, etc., it has excellent effects such as excellent oil permeability and dust trapping performance being obtained in the long term.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of an insert-molded product according to the present invention.

FIG. 2 is a sectional view taken along line XX of the one shown in FIG.

FIG. 3 is a schematic cross-sectional view showing a state of a conventional insert-molded product at the time of molding.

FIG. 4 is a schematic perspective view showing a state after molding of a conventional insert molded product.

[Explanation of symbols]

 1, 11 ... Filtration material 2 ... Peripheral part 3, 7 ... Minute part 4, 14 ... Non-embedded part (filtration part) 5 ... Boundary part 6 ... Central part 8, 18 ... Frame part 12 ... … Appropriate part 20 …… Mold

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location F01M 11/03 B 7443-3G

Claims (3)

[Scope of utility model registration request] 1. A frame portion (8) formed in an appropriate shape,
A filter material (1) having at least a peripheral edge portion (2) embedded in the frame portion (8), and a peripheral edge portion (2) embedded in the frame portion (8) of the filter material (1) and the same. The crushing rate of the continuous minute portion (3) is made larger than that of the portion (4) not embedded in the frame portion (8), and the minute portion continuous in the peripheral portion (2) embedded in the frame portion (8). An insert-molded article, characterized in that the boundary (5) between the part (3) and the part (4) not embedded in the frame (8) is formed into an appropriate curved surface. 2. The crushing ratio of the peripheral portion (2) embedded in the frame portion (8) of the filter medium (1) and the minute portion (3) continuous to the peripheral portion (2) is 70 to 80%. Insert-molded product described. 3. The insert-molded product according to claim 1, wherein the frame portion (8) is made of resin, and the filtering material (1) is made of non-woven fabric.