JPH06182809A - Production of oil filter element - Google Patents

Abstract

PURPOSE:To enhance productivity at the time of the production of an oil filter element made of a synthetic resin having a reticulated filter material made of a synthetic resin attached thereto by injection molding and to remove the contamination of the element accompanied by production. CONSTITUTION:A mold is opened to supply ribbon like reticulated filter materials 3 to the space between the split molds 10 opposed to molding cores 9 and, subsequently, the mold is closed to surround the peripheries of the molding cores 9 by two filter materials 3 to perform the injection molding of a synthetic resin. An intermediate molded product having the filtering materials protruding to the outside is formed to the outside of a frame member and the filter materials of the outside of the frame member are cut to complete a filter element. Since it is unnecessary to perform work fitting the filter materials to the peripheries of the molding cores in a round ring shape one by one, productivity can be enhanced. Since the cutting work of the reticulated filter materials can be performed under heating, a product is not contaminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing an oil filter element formed by welding a synthetic resin mesh filter material to a synthetic resin frame simultaneously with injection molding of the frame.

[0002]

2. Description of the Related Art Conventionally, in order to manufacture an oil filter element in which a synthetic resin mesh filter material is welded to such a synthetic resin frame, one mesh shape is formed around a molding core in a mold. Put the filtering material into a round ring in advance and fit it,
After the mold is clamped, a method of injecting a resin into a molding cavity in a mold to mold a frame and at the same time welding a filter material to the frame is adopted.

[0003]

According to the above-mentioned conventional method, it is necessary to work the mesh filter material into a round ring for each oil filter element and fit them into the molding core one by one. There was a problem that the property was extremely low. Further, a mesh filter material is fitted around one long molded core, and a plurality of frame bodies are continuously and integrally injection-molded in the axial direction of this molded core to form an intermediate molded product, and this intermediate molded product is cut. A method of manufacturing individual oil filter elements by using the above method has also been proposed. Although this method can increase the productivity somewhat, it still does not have a significant effect because it requires the work of fitting the mesh filter material as a round ring around the molding core. Also, since a cutter must be used to cut the frame, burrs occur,
There is a problem that this becomes garbage and has a harmful effect.

Accordingly, it is an object of the present invention to provide a method for manufacturing an oil filter element which can improve productivity without requiring the work of fitting the mesh-like filter medium into a round ring one by one, into the molding core. It is a thing. It is a further object of the present invention to provide a method for manufacturing an oil filter element which is capable of injection-molding a large number of frame bodies having a mesh filter material welded thereto at the same time and which does not cause burrs when separated into a large number of frame bodies. Is.

[0005]

In order to achieve the above object, the method of manufacturing an oil filter element according to the present invention comprises at least one molding core and at least one opposing molding core forming a molding cavity surrounding the molding core. A mold comprising a pair of split dies each having a pair of molding recesses is opened, and two synthetic resin mesh filter materials are inserted between the molding core and each molding recess. By closing the mold into which the mesh filter material is inserted and injection-molding a frame into the molding cavity, and simultaneously welding the mesh filter material to the frame body to form two mesh shapes on both outer sides of the frame body. Forming an intermediate molded product of the oil filter element in which the overlapping portion of the filter material is formed to project, and opening the mold to take out the intermediate molded product, and the mesh-like filtration formed on both outer sides of the intermediate molded product. Overlapping part of material Characterized in that it consists of cutting removed from the frame.

In a particularly preferred embodiment of the present invention, in the above method, the mold comprises a plurality of molding cores arranged in a row, and a plurality of molding recesses facing each other with the molding cores in between. And a pair of split molds arranged, wherein the two mesh filters are ribbon mesh filters along the row of molding recesses of each split mold in a state where the mold is opened. It is characterized by being inserted by feeding from one end to the other end.

[0007]

In the present invention, when the mold is opened, the two mesh-shaped filter materials are fed to both sides of the molding core in a flat state and are closed around the molding core to be mounted around the molding core. A pair of reels placed on one side of the mold interlocks with the opening and closing of the mold to continuously feed two ribbon-shaped filter media into the mold to form a predetermined shape of filter media around the molding core. As a result, the work of mounting the filter medium is extremely efficient. In addition, it is possible to arrange a plurality of molding recesses in each split mold along the feed direction of the filter medium to simultaneously mold a large number of filter elements connected by the filter medium, or separate into individual filter elements. In this case, only the filter material connected to the outside of the frame body needs to be cut, so that heat cutting such as applying a nichrome wire can be applied, and burr generation can be prevented.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will now be described with reference to the drawings. FIG. 1 is a perspective view showing an example of an oil filter element 1 manufactured according to the present invention. Reference numeral 2 is a synthetic resin frame, and 3 is a synthetic resin mesh filter material. FIG. 2 is a cross-sectional view of an oil filter equipped with the element 1 of FIG. 1. The element 1 is inserted into the tank 4, and the flange portion of the upper end thereof is screwed to the upper end of the tank 4 and the tank 4 together with the rubber bellows 5. It is sandwiched between 6. 7
Is an oil inlet provided in the cap, and 8 is an oil outlet.

FIG. 3 shows a stage in which a mold is opened and a ribbon-shaped filter medium is fed in an embodiment in which a plurality of (four in the figure) filter elements 1 of FIG. 1 are continuously molded simultaneously. FIG. 3 is a perspective view showing a plurality of molding cores 9 arranged in a line between a pair of opposing split molds 10.
A plurality of molding recesses 11 are formed with the molding core 9 in between. Between each split mold 10 and the molding core 9, a ribbon of a mesh filter material 3 made of synthetic resin is fed from a reel 12 provided on one outer side of each split mold 10 to form each molding core 9 with two filters 3. Put it in the sandwiched state.

Next, when the split mold 10 is closed, the two filter media 3 are sandwiched between the molding recess 11 having a semicircular cross section of each split mold 10 and the molding core 9 as shown in FIG. Can be bent to surround half of Reference numeral 13 in the drawing is a groove for forming a column of the frame of the element formed in the forming recess 11. As described above, when the synthetic resin is injected into the molding cavity of the closed mold in which the filter medium 3 is incorporated around the molding core 9, the frame body 2 is injection-molded and the filter medium 3 is welded to the frame body 2 at the same time. A plurality of molded products can be obtained.

Next, the mold is opened and the molded product is taken out, as shown in FIG.
As shown in FIG. 3, an intermediate molded product is obtained in which a plurality of filter elements 1 are connected at the overlapping portion 14 of two filter media. These overlapping portions 14 are, for example, an electric heating type cutting tool in which nichrome wires 15 are stretched between the ends of both legs of a U-shaped gripping portion as shown in FIG. 6, or heat such as using hot air or a laser beam. The individual filter elements as shown in FIG. 1 are obtained by cutting by the method of adding.

The embodiment described above shows an example in which four filter elements are manufactured at the same time. However, since the mesh filter material can be fed as a ribbon from the lateral direction of the mold, the number of elements manufactured at the same time can be reduced. It can be increased significantly if needed. Further, the present invention can be advantageously applied not only to the case of manufacturing a plurality of filter elements at the same time but also to the case of manufacturing a single filter element.

[0013]

EFFECTS OF THE INVENTION The present invention supplies two mesh-shaped filter media with a molding core sandwiched between them with the mold opened, and the mold core is automatically closed with two filter media simply by closing the mold. Since it can be surrounded, the productivity can be significantly increased as compared with the conventional manufacturing method which requires the work of fitting the filter media into the molding core as a round ring one by one.

Further, when a large number of elements are manufactured simultaneously by the conventional method, the frame body must be cut together with the filter material when separating into individual elements, so that mechanical cutting with a cutter or the like is required. Although there was a problem that the filter became dirty, such as the formation of burrs and cutting waste, in the case of the present invention, only the overlapping portion of the filter medium that connects the individual elements need be cut, so the separation work is performed by heat melting cutting. Can be done by Therefore, there is an effect that the problem of filter contamination can be avoided.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of an oil filter element manufactured according to the present invention.

FIG. 2 is a sectional view of an oil filter equipped with the element of FIG.

FIG. 3 is a perspective view showing an outline of an apparatus for carrying out the present invention in a mold open state.

FIG. 4 is a plan view showing the outline of the apparatus of FIG. 3 in a mold closed state.

5 is a perspective view of an intermediate molded product injection-molded by the apparatus of FIGS. 3 and 4. FIG.

6 is a side view of a nichrome wire type heating / cutting tool used for cutting a filter medium portion connecting each filter element in the intermediate molded product of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Oil filter element 2 Frame 3 Mesh filter material 9 Molding core 10 Split mold 11 Molding recess 14 Filter material overlapping part 15 Nichrome wire

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location B01D 39/00 B // B29L 31:14 4F

Claims (4)

[Claims] 1. A method for producing an oil filter element comprising a synthetic resin frame and a synthetic resin mesh filter material welded thereto, comprising: (a) at least one molding core and a molding cavity surrounding the molding core; At least one opposite to form
A mold comprising a pair of split dies each having a pair of molding recesses is opened, and two synthetic resin mesh filter materials are inserted between the molding core and each molding recess. What to do,
(B) A mold in which the mesh filter material is inserted is closed, and the frame body is injection-molded in the molding cavity, and at the same time, the mesh filter material is welded to the frame body to form two meshes on both outer sides of the frame body. Forming an intermediate molded product of an oil filter element in which the overlapping portion of the filter material is formed to project, and (c)
An oil filter, comprising: opening the mold to take out the intermediate molded product, and cutting and removing overlapping portions of the mesh filter material formed on both outer sides of the intermediate molded product from the frame body. Element manufacturing method. 2. The mold comprises a plurality of molding cores arranged in a line, and a pair of split molds in which a plurality of molding recesses facing each other with the molding core in between are arranged in a line. 2 above
The mesh-shaped filter material is inserted by feeding the ribbon-shaped mesh-shaped filter material from one end to the other end of the split mold along the row of the molding recesses of each split mold in a state where the mold is opened. The method for manufacturing an oil filter element according to claim 1, wherein 3. The overlapping portion of the mesh filter material is cut by applying heat.
A method for manufacturing the oil filter element according to 1. 4. The method of manufacturing an oil filter element according to claim 3, wherein the cutting of the overlapping portion by heat is performed by applying a nichrome wire to the cutting portion.