| 摘要 |
PROBLEM TO BE SOLVED: To provide methods and apparatus for dispensing highly viscous materials in discrete small volumes.SOLUTION: In an adhesive dispensing system, liquid material is received through an inlet at a low pressure, and a dispensing module rapidly develops high pressure at an outlet to jet the liquid material from the outlet. In another aspect, an apparatus for jetting liquid material includes a dispenser body having a liquid chamber. A piston is disposed within the liquid chamber movably from a position in which a piston tip is separate from a complimentary shaped recess to a position in which the piston tip effectively seals off the recess and then to a position in which the piston tip is received within the recess to displace a discrete volume of liquid material from the recess.SELECTED DRAWING: Figure 4 |
