Title:
PISTON, DEVICE FOR MANUFACTURING PISTONS, AND METHOD FOR MANUFACTURING PISTONS
Document Type and Number:
WIPO Patent Application WO/2022/007323
Kind Code:
A1
Abstract:
A piston, a device for manufacturing pistons, and a method for manufacturing pistons. The piston comprises: a piston base (100); a porous functional layer (101), which is provided on the top surface of the piston base (100); a microporous filling layer (102), which is provided on the top surface of the porous functional layer (101), pores in the microporous filling layer (102) having a diameter smaller than the diameter of pores in the porous functional layer (101); and a sealing layer (103), which is is provided on the top surface of the microporous filling layer (102) and is provided so as to partially seal the pores in the microporous filling layer (102). The microporous filling layer (102) of the piston provides a transition between the porous functional layer (101) and the sealing layer (103), while the microporous filling layer (102) also, to a certain degree, has a filling effect in the porous functional layer (101). The sealing layer (103) has a blocking effect, thus preventing corrosive substances from entering the pores of the porous functional layer (101) and the microporous filling layer (102) and thus corroding said layers, thereby increasing the corrosion resistance of the piston.
Inventors:
LI ZHIJIE (CN)
QI SHAOBAO (CN)
WANG SHIJIE (CN)
MA FEI (CN)
XIA YUAN (CN)
QI SHAOBAO (CN)
WANG SHIJIE (CN)
MA FEI (CN)
XIA YUAN (CN)
Application Number:
PCT/CN2020/134196
Publication Date:
January 13, 2022
Filing Date:
December 07, 2020
Export Citation:
Assignee:
WEICHAI POWER CO LTD (CN)
International Classes:
F02F3/00; C25D3/02; C25D7/04; C25D15/00; F02F3/10
Foreign References:
| CN111535935A | 2020-08-14 | |||
| CN105339531A | 2016-02-17 | |||
| CN107313095A | 2017-11-03 | |||
| CN105452503A | 2016-03-30 | |||
| US20070218303A1 | 2007-09-20 | |||
| JP2017061722A | 2017-03-30 | |||
| JP2003106216A | 2003-04-09 | |||
| CN110461798A | 2019-11-15 | |||
| JP2009235539A | 2009-10-15 | |||
| CN107532303A | 2018-01-02 |
Attorney, Agent or Firm:
BEYOND ATTORNEYS AT LAW (CN)
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