| 摘要 |
The exchange oil filter for use in filtering devices fitted in the oil intake line of heating oil burners has a porous, cup-shaped filter body of sintered polyethylene particles and a substantially annular polypropylene securing component fixed to the filter body. The annular securing device is fixed solely to the rim of the cup-shaped filter body, without penetrating inside it, in such a way that, at the jointing area between the two components, the material of both of them are partly welded together and/or the material of the securing component is caused partially to penetrate the pores of the porous filter body. The oil filter can be manufactured in one working cycle by heating granulated polyethylene and polypropylene together in a ceramic mould by microwaves. |
