Title:
フィルター装置及びフィルター装置のフィルター素子から汚れ粒子を除去するための清浄ユニット
Document Type and Number:
Japanese Patent JP6999302
Kind Code:
B2
Abstract:
The invention relates to a filtering device for removing dirt particles and contaminants from a plastic melt, comprising a housing (2) having a filter chamber (4) and an inlet for feeding plastic melt into the filter chamber and an outlet for channelling plastic melt out of the filter chamber and a dirt outlet (6) for discharging dirt particles from the housing (2); a filter element (8) which is arranged in the filter chamber (4) and through which the stream of melt can be channelled and which is adapted to retain any dirt particles contained in the stream of melt, and a cleaning unit (10) for cleaning the filter element (8) of dirt particles retained by means of the filter element, said cleaning unit (10) having a cleaning head (12) with at least one scraper member (14,14') for detaching dirt particles from the filter element (8), wherein said cleaning head (12) and said filter element (8) are movable relative to each other and can be brought into contact with each other at least temporarily, wherein the at least one scraper member (14,14') is coupled to a servomechanism (16) which is adapted to press the scraper member onto the surface of the filter element (8). The invention is characterised in that the servomechanism (16) has at least one bellows cylinder (18, 18', 18") comprising a foot section (54, 54') having at least one opening (66) for a fluid-channelling connection to a pressure source, a head section (56, 56') which can be moved along an adjustment path relative to the foot section (54, 54'), a deformable bellows element (52, 52') which is sealingly connected to the foot section (54, 54') and to the head section (56, 56'), and a pressure chamber (20) of variable volume which is adapted to move the head section (56, 56') relative to the foot section (54, 54') depending on the pressure prevailing in the pressure chamber, said pressure chamber (20) being connectable to the pressure source.
Inventors:
Roberto Midler
Application Number:
JP2017131943A
Publication Date:
January 18, 2022
Filing Date:
July 05, 2017
Export Citation:
Assignee:
NORDSON CORPORATION
International Classes:
B29C48/694; B01D24/44; B01D29/11; B01D29/64; B01D29/94; B01D35/02; B29C48/03
Domestic Patent References:
| JP58126115A | ||||
| JP61124708A | ||||
| JP11514577A | ||||
| JP57109634A |
Foreign References:
| WO2005098341A1 |
Attorney, Agent or Firm:
Shinichiro Tanaka
Teshimaru Ken
Yoshi Kazuhiko Ta
Matsushita Mitsuru
Ichiro Kurasawa
Yasushi Yamamoto
Katsuomi Isogai
Teshimaru Ken
Yoshi Kazuhiko Ta
Matsushita Mitsuru
Ichiro Kurasawa
Yasushi Yamamoto
Katsuomi Isogai