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Air bubble ingress prevention mechanism, liquid material discharge device provided with the same, and liquid material discharge method

A discharge device and air bubble technology, which is applied to the device and coating of the surface coating liquid, can solve the problems of quantitative discharge, unfixed plunger advance, etc., and achieve the effect of reducing unevenness and simple filling action

Active Publication Date: 2015-06-17
MUSASHI ENG INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If air bubbles are mixed in the liquid substance in the metering part, the amount of liquid substance to be discharged is not constant with respect to the advance amount of the plunger due to the influence of the compression characteristics of the air bubbles, so precise quantitative discharge cannot be performed.

Method used

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  • Air bubble ingress prevention mechanism, liquid material discharge device provided with the same, and liquid material discharge method
  • Air bubble ingress prevention mechanism, liquid material discharge device provided with the same, and liquid material discharge method
  • Air bubble ingress prevention mechanism, liquid material discharge device provided with the same, and liquid material discharge method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0122] [discharging device]

[0123] Figure 5 and Image 6 The discharge device provided with the air-bubble prevention mechanism of Example 1 is shown. Figure 5 Part (a) shows the front view of the discharge device, Figure 5 Part (b) of (b) shows a side view. again, Image 6 It is a cross-sectional view of main parts showing the air-bubble prevention mechanism and discharge mechanism. Image 6 The hatched part in is the section.

[0124] The discharge device 25 includes: a liquid substance supply source (syringe pump 26) that supplies the liquid substance 20; a metering unit 6 filled with the liquid substance 20 to be discharged; a plunger 8 that moves forward and backward in the metering unit 6; a nozzle 38 , which has a discharge port for discharging the liquid substance 20; a switching valve 39, which switches the communication between the liquid substance supply source and the metering part 6, or the communication between the metering part 6 and the nozzle 38;

...

Embodiment 2

[0143] [Coating device]

[0144] Figure 7 A coating device equipped with the discharge device of the above-mentioned Example 1 is shown.

[0145] The coating device 44 of this embodiment has: X drive mechanism 45, which can move in the direction of symbol 54; Y drive mechanism 46, which can move in the direction of symbol 55; and Z drive mechanism 47, which can move in the direction of symbol 56. The discharge device 25 is provided in the Z drive mechanism 47 , and the Z drive mechanism 47 is provided in the X drive mechanism 45 . Moreover, the stage 48 on which the coating object 49 is mounted is provided in the Y drive mechanism 46. As shown in FIG. By providing the above driving mechanism, the discharge device 25 can be relatively moved in the XYZ directions ( 54 , 55 , 56 ) with respect to the object 49 to be coated.

[0146] The control unit 50 supplies the compressed gas for pumping the liquid substance 20 from the compressed gas line 51 to the discharge device 25 , an...

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Abstract

Disclosed are an air bubble ingress prevention mechanism, a liquid material discharge device provided with the air bubble ingress prevention mechanism, and a liquid material discharge method, with which a constant filled state can be achieved without variations and without requiring any additional equipment when a metering section is filled with liquid material. A discharge device is provided with a metering section which has a flow passage communicating with a nozzle, and a plunger which moves back and forth within the flow passage of the metering section. The discharge device comprises an air bubble ingress prevention mechanism which can be mounted at the end of the metering section on the opposite side to the nozzle, and which includes: a first hole which communicates with the flow passage of the metering section, and within which the plunger moves back and forth; a first sealing member which is provided at the end of the first hole at the nozzle side; a second sealing member which is provided at the end of the first hole at the opposite side to the nozzle; and a second hole which communicates with the side face of the first hole.

Description

technical field [0001] The present invention relates to a mechanism for preventing air bubbles from being quantitatively discharged from a nozzle by using a plunger to move forward in a metering portion filled with a liquid substance, and to a liquid substance discharge device and a liquid substance discharge method provided with the mechanism. Background technique [0002] As one of the devices for precisely quantitatively discharging various liquid substances, there is known a plunger type discharge device, which uses a plunger (or piston) to move forward in a metering unit (or syringe pump) filled with liquid substances. And the liquid substance is quantitatively discharged from the nozzle. This type of discharge device can discharge from the nozzle only the amount of the volume that moves the plunger forward, so it can achieve higher precision and more stable discharge than other types of discharge devices, so it can be used for resin sealing of electronic parts , Batte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05C5/00B05D1/26
CPCB05C5/0225B05D1/26B05C11/10B05D2252/02
Inventor 生岛和正
Owner MUSASHI ENG INC