JPS59156411A - Preparation of filter - Google Patents

Abstract

PURPOSE:To prepare a filter consisting of an upper and a lower cases each made of synthetic resin without generating a molten burr or a fine powder, by integrating both cases by heating the flange parts thereof in such a state that a heating plate is placed on a filter element comprising a metal filter material. CONSTITUTION:A filtr element 14 is placed on the flange 12 of a lower case 13 made of a synthetic resin, for example, a thermoplastic resin such as nylon having an outflow port 11 and a flange 12 provided to the outer periphery thereof. Subsequently, a heating plate 15 heated to a predetermined temp. is placed on the filter element 14 and the flange 17 of an upper case 18 made of the same synthetic resin having an inflow port 16 and the flange 17 provided to the outer periphery thereof is further placed on said heating plate 15. After lapse of a predetermined time, the heating plate 15 is removed and the flanges 17, 12 of the upper and the lower cases 18, 13 are closely contacted to weld both of them.

Description

DETAILED DESCRIPTION OF THE INVENTION The present application relates to a method of manufacturing a filter for a transmission of an internal combustion engine, for example.

As shown in FIG. 1, the filter that is the subject of this application has a non-woven fabric between an upper case 1 made of synthetic resin and a lower case 2 as well.
The over-element 3 is cast and welded, and these are integrated.

The above-mentioned filter first fixes the fault element 3 to the lower case 2, and then attaches it to the upper case 1 at the outer periphery flange l.
a, 2a and assemble, then each flange la
, 2a by a vibration welding process.

However, the manufacturing method using such steps has the following drawbacks. First, if the upper and lower cases 1.2 are welded using friction welding means such as vibration welding, welding burrs and fine powder will be generated at the welded portion. If fluid is allowed to flow through the filter while this occurs, it will peel off and mix into the furnace liquid, which is a drawback. Secondly, the above manufacturing method requires two steps of joining, which results in poor production efficiency.

Therefore, a manufacturing method has been proposed in which a metal transmissive element is placed between the upper and lower synthetic resin cases, a filter is assembled, the transmissive element is heated by irradiation with high frequency waves, and the transmissive elements are welded together. has been done.

However, in this manufacturing method, the high frequency source and offshore element 1
It is difficult to set the gap between the filtration element and the filtration element uniformly over the entire circumference, making it difficult to uniformly generate heat from the filtration element. Uneven heating causes uneven welding, resulting in unwelded areas.

Therefore, in the present application, a filtration element is placed on the upper surface of a lower case made of synthetic resin, a heating plate is placed on top of the filtration element, and at the same time, a special upper case made of synthetic wood is placed on top of the heating plate, and After a period of time, the hot plate is removed and the upper and lower cases are brought into close contact with each other and welded together, thereby solving the above-mentioned drawbacks.

To explain with an example, as shown in FIG.
A filtration element 14 is placed on the flange 12 of a synthetic resin lower case 13 which has a flange 12 on its outer periphery. Next, a hot plate 15 heated to a predetermined temperature is placed on top of the filter element 14, and the inlet 1 is placed on the hot plate.
6 and a flange 17 provided on the outer periphery of the synthetic resin upper case 18 is placed thereon. After a predetermined period of time has elapsed, the hot plate 15 is removed, and the flanges 17.12 of the upper and lower cases 18.13 are brought into close contact and welded together. The synthetic resin is a thermoplastic resin such as nylon, and the filtration element 15 is made of metal legs. The hot plate 15 has an abutment portion 19 that contacts the flanges 17.12 of the upper and lower cases 18.13.
For example, an electric heater or a heating fluid flow path (not shown) is embedded inside to form a heating means.

These heating means are suitable for uniformly heating the hot plate 15. Instead of such heating means, a method may be used in which the hot plate 15 is left in a constant temperature bath for a certain period of time.

In the above process, the heat from the contact part 19 of the hot plate 15 is
The flange 1 of the lower case 13 via the filter element 14
2 and is also directly conducted to the flange 17 of the upper case 18. This ensures that the entire surface of each flange 17, 12 is melted.

When the hot plate 15 is placed on the filtration element 15 and the lower case 13, they melt almost simultaneously, and when the upper case 18 is brought into contact with the lower case 13 after the hot plate 15 is removed, they are welded together. Ru. Flange 7.1 of upper and lower cases 18.13
There is no frictional force between the two, unlike that which occurs during shaking and welding, and hardly any particles or fine powder are formed in the melt.

As described above, in the manufacturing method of the present invention, a filtration element made of gold material is placed on the flange of a synthetic resin lower case, and then a relatively homogeneous temperature distribution is easily obtained on this filtration element. It is characterized by a manufacturing method in which a hot plate is placed, the flange of the upper case is brought into contact with the flange of the upper case, and after a predetermined period of time, the hot plate is removed and the upper and lower cases and the filtration element are integrated. Provides an integrated filter in one step without creating

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a filter having a structure obtained by a conventional manufacturing method, and FIG. 2 is a sectional view of a filter and a hot plate showing the manufacturing method of the present invention.

Claims (1)

[Claims] A transient element made of metal material is placed on the flange of a thermoplastic resin lower case that has an inlet and a flange on the outer periphery, and then a hot plate heated to a predetermined temperature is placed on the element, and the hot plate is heated to a predetermined temperature. From the process of placing the flange of a thermoplastic resin upper case with an outlet and an outer periphery I and a flange on top, then removing the hot plate, abutting the flanges of the upper and lower cases, and welding them together. A method for manufacturing a filter consisting of: