Dispensing system having a mechanical amplifier

A distribution system and amplifier technology, applied in the direction of generators/motors, devices for coating liquid on the surface, piezoelectric effect/electrostrictive or magnetostrictive motors, etc., can solve problems such as shortened life expectancy

Pending Publication Date: 2021-12-17
NORDSON CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the heap is under stress, the life expectancy is greatly reduced

Method used

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  • Dispensing system having a mechanical amplifier
  • Dispensing system having a mechanical amplifier
  • Dispensing system having a mechanical amplifier

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Embodiment Construction

[0023] Apparatuses and methods for amplifying movement of piezoelectric actuators are disclosed. While the present disclosure provides examples utilizing piezoelectric movement, it should be understood that the amplification devices and methods disclosed herein may also be used to amplify other types of mechanical movement, such as pneumatic, hydraulic, elastic, or other suitable movement mechanisms.

[0024] refer to Figure 1 to Figure 2 , shows dispensing system 10 having fluid body 16 coupled to actuator housing 18 . The fluid body 16 is held within a fluid body housing 19, which may include one or more heaters (not shown), depending on the needs of the application. The fluid body 16 is configured to receive fluid under pressure from a suitable fluid source 20 , such as a syringe barrel. Valve assembly 22 is coupled to housing 18 and extends into fluid body 16 . Mechanical amplifier 200 is coupled between piezoelectric actuator 26 and valve assembly 22, as will be descr...

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Abstract

A dispensing system (10) includes a piezoelectric stack (40) having a distal end (220) and being configured to expand upon application of a voltage such that the distal end is moved by a first length. The system further includes an amplifier (200) with a primary surface (204) to contact the distal end of the stack and a secondary surface (206), a base configured to contact the secondary surface, and a valve assembly (22) with an outlet orifice (104) and valve element (76). The valve element is configured to move in first and second directions and is coupled with the amplifier. When the distal end is moved by a first length, a portion of the amplifier is moved by a second length that is greater than the first length, and the valve element is moved in a first direction by the second length.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to U.S. Provisional Patent Application No. 62 / 846,689, filed May 12, 2019, the disclosure of which is hereby incorporated by reference as if fully set forth herein. technical field [0003] The present invention relates generally to dispensers for depositing fluid droplets onto a substrate, and more particularly to dispensers actuated by one or more piezoelectric elements. Background technique [0004] Dispensers are commonly used to apply minute quantities of materials, such as viscous fluids with viscosities in excess of 50 centipoise, to substrates. For example, tacky materials can include general purpose adhesives, UV curable adhesives, solder paste, flux, solder mask, thermal grease, lid sealant, oil, encapsulant, potting compound, epoxy, die attach fluid , silicone, RTV and cyanoacrylate. [0005] The dispenser may typically have a pneumatic or electric actuator for repeatedly m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05B12/08B05B15/00H02N2/02H02N2/04
CPCB05B12/082B05B15/00H02N2/02H02N2/04H02N2/043B05C5/0225B05C11/1034B05B1/083
Inventor 克雷格·F·布里斯
Owner NORDSON CORP
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