国家/地区 中国（2）
IPC部 B（2）
IPC大类 B29（2） F16（2）
IPC小类 B29B（2）
IPC B29B007/22（2）
发明人 WEI F（2）
公开年 2021（2）
申请年 2020（2） 
专利权人 GUANGDONG WE.（2）

Internal pressure type packing sealing device for internal mixer, has spring whose one end is propped against rotor side wall, and hard alloy ring sleeved on periphery side of movable ring, where hard alloy ring is in contact with friction graphite.

WEI F

Single-acting ring axial movable packing sealing device for internal mixer, has pressing nut sleeved on outer screw thread of rotor, and tightening nut whose adjusting depth is screwed into rotor to make movable ring pressing fixed ring end sealing surface.

WEI F