Dispenser For Highly Viscous Fluid

Abstract

The present invention relates to a dispenser for discharging a highly viscous fluid which possesses a viscosity ranging from 10 to 1,000 Pa·s at 25° C. and contains filler particles, the dispenser comprising: (i) a highly viscous fluid-supply part (A) equipped with a container ( 3 ) containing said highly viscous fluid (M) and possessing an outlet ( 3 a ) of said highly viscous fluid, a plunger ( 2 ) capable of discharging said highly viscous fluid from said outlet by pressing said highly viscous fluid contained in said container, and a servomotor ( 4 ) driving said plunger; and (ii) a highly viscous fluid-discharge part (B) equipped with a pipe ( 7 ) arranged for delivering said highly viscous fluid discharged from said outlet, an openable and closable valve ( 8 ) connected to said pipe, and a discharge port ( 9 ) for discharging said highly viscous fluid. The dispenser according to the present invention can stably discharge a specified amount of a highly viscous fluid containing filler particles for a long period of time, and can be used even in a clean room.

1 . A dispenser for discharging a highly viscous fluid which possesses a viscosity ranging from 10 to 1,000 Pa·s at 25° C. and contains filler particles, the dispenser comprising:
 (i) a highly viscous fluid-supply part equipped with a container containing said highly viscous fluid and possessing an outlet of said highly viscous fluid, 
 a plunger capable of discharging said highly viscous fluid from said outlet by pressing said highly viscous fluid contained in said container, and 
 a servomotor driving said plunger; and 
 (ii) a highly viscous fluid-discharge part equipped with a pipe arranged for delivering said highly viscous fluid discharged from said outlet, 
 an openable and closable valve connected to said pipe, and 
 a discharge port for discharging said highly viscous fluid. 
 
     
     
         2 . The dispenser according to  claim 1 , further comprising a converting mechanism for converting a rotation drive of said servomotor into a linear drive. 
     
     
         3 . The dispenser according to  claim 1 , further comprising a packing provided between said plunger and said container. 
     
     
         4 . The dispenser according to  claim 1 , which can control the opening and closing of said valve and/or driving of said servomotor by detecting a pressure exerting on said highly viscous fluid. 
     
     
         5 . The dispenser according to  claim 1 , which can control a discharged amount of said highly viscous fluid by controlling the opening and closing of said valve and/or driving of said servomotor by detecting a pressure exerting on said highly viscous fluid. 
     
     
         6 . The dispenser according to  claim 1 , wherein a single amount discharged of said highly viscous fluid ranges from 1 to 10 g. 
     
     
         7 . The dispenser according to  claim 1 , wherein a part of said container and/or said plunger contacting at least said highly viscous fluid is abrasion-resistant. 
     
     
         8 . The dispenser according to  claim 1 , wherein said filler particles comprise at least one selected from the group consisting of metals, inorganic oxides, inorganic nitrides, and inorganic carbides. 
     
     
         9 . The dispenser according to  claim 1 , wherein an amount of said filler particles ranges from 50 to 99% by mass with respect to the total mass of said highly viscous fluid. 
     
     
         10 . The dispenser according to  claim 1 , wherein said highly viscous fluid is a silicone grease. 
     
     
         11 . The dispenser according to  claim 8 , wherein an amount of said filler particles ranges from 50 to 99% by mass with respect to the total mass of said highly viscous fluid. 
     
     
         12 . The dispenser according to  claim 11 , wherein said highly viscous fluid is a silicone grease.