| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a paste discharge device which prevents paste from leaking from a sealing surface. <P>SOLUTION: In a shaft type multiple plunger pump used in the paste discharge device to discharge slurry-like paste, an outer-periphery-like sliding surface 32c is provided on a plunger block 32 rotatively driven by a motor 22 and provided with a plurality of cylinder holes 32b to be inserted with a plunger 26, and port switching is carried out between a first external port 35a on the suction side, a second external port 35b and each cylinder hole 32b by bringing an inner-periphery-like sealing surface 33c provided on a seal ring 33 into sliding contact with the sliding surface 32c. Thereby, paste is prevented from leaking from the sealing surface by always keeping a gap between sliding contact surfaces constant. <P>COPYRIGHT: (C)2003,JPO</p> |
