CN101745488A

CN101745488A - Liquid spraying-out apparatus

Info

Publication number: CN101745488A
Application number: CN200910246935A
Authority: CN
Inventors: 辻田贵洋
Original assignee: Juki Corp
Current assignee: Juki Corp
Priority date: 2008-12-03
Filing date: 2009-12-03
Publication date: 2010-06-23
Also published as: JP2010131493A

Abstract

The invention provides a liquid spraying-out apparatus, which can perform the syringe pressurization, attraction and opening to the atmosphere on the basis that the number of open and close valves in use is reduced. The liquid spraying-out apparatus has a syringe filled with a liquid, and an air pressure source for supplying the pressurized air for the syringe to force the filled liquid to be sprayed out from the front, the syringe is connected with a sucking opening of an ejector having the function of generating the negative pressure, the air pressure source is connected with an air feed opening of the ejector, an air feed open and close valve is arranged between the air pressure source and the air feed opening of the ejector, and an exhaust open and close valve is arranged at the outlet side of the exhaust outlet of the ejector.

Description

Liquid ejection apparatus

Technical field

The present invention relates to a kind of liquid ejection apparatus, the liquid ejection apparatus that uses when particularly being suitable on electric substrate adhesive-applying.

Background technology

On electric substrate, carry in the surface-mount devices of electronic unit, generally carry out two-sided installation at two surperficial boarded parts of substrate.

In this two-sided installation procedure, in order electronic unit to be dropped during substrate in counter-rotating, the electronic unit that the general using adhesive securement is carried.Therefore, for assigned position adhesive-applying, use adhesive applicating apparatus (liquid ejection apparatus) at present at substrate.

As this adhesive applicating apparatus, for example in patent documentation 1 publicity following technology: for realize pressurization, attract, to this three state of atmosphere opening, have pressurized source, negative pressure source, to atmospheric air open port, by 3 opening/closing circuit controlling these three parts respectively being set and switching respectively, the syringe that is filled with bonding agent is supplied with malleation and sprayed, and supply with negative pressure and the quick residual pressure of removing when spraying, to atmosphere opening, realize coating then by this a series of actions.

Patent documentation 1: the spy of Japan opens the 2006-192371 communique

Summary of the invention

But, in the adhesive applicating apparatus of aforementioned patent document 1 publicity, there is following problems: in order to realize supplying with (pressurization), negative pressure feeding (attraction) and to this three state of atmosphere opening to the malleation of the syringe of the bonding agent that is used to spray institute's filling, for positive pressure source, negative pressure source, atmospheric air open port open and close valve is set respectively, needs 3 open and close valves so amount to.

The present invention proposes in order to solve aforementioned existing issue, and its purpose is to provide a kind of liquid ejection apparatus, and it can reduce the number of the open and close valve of use, make syringe realize pressurization, attract, to this three state of atmosphere opening.

The present invention is a kind of liquid ejection apparatus, and it has: syringe, its fill liquid; And air pressure source, it supplies with forced air to this syringe, and the liquid of filling is sprayed from leading section, it is characterized in that having: ejector, it has negative pressure and produces function, the attraction mouth of this ejector and aforementioned syringe link, and air supply opening and aforementioned air pressure source link; The air feed open and close valve, it is configured between the air supply opening of aforementioned air pressure source and aforementioned ejector; And the exhaust open and close valve, it is configured in the outlet side of the exhaust outlet of aforementioned ejector.

The present invention also has the control module that sprays control, and this ejection control may further comprise the steps: the air feed open and close valve is opened, the exhaust open and close valve is closed and carry out the liquid ejection; Under the state that the air feed open and close valve is opened, open the exhaust open and close valve and the interior residual pressure of aspirating syringe; And under the state that the exhaust open and close valve is opened, close the air feed open and close valve and make syringe inside to atmosphere opening.

The effect of invention

According to the present invention, between air pressure source and syringe as pressurized source, setting has the ejector that negative pressure produces function, discharge from exhaust outlet if make from the pressure-air of air supply opening supply, then it can attract a mouthful generation negative pressure, and, because the inlet side at air supply opening disposes the air feed open and close valve respectively, outlet side configuration exhaust open and close valve at exhaust outlet, so can be by suitably switching the on-off action of these 2 open and close valves, and in syringe, realize pressurization reliably, attract, to this three state of atmosphere opening.Therefore, because can need the situation of 3 open and close valves to be reduced to 2 with having now in order to realize this function, so than existing, the cost of magnetic valve can be suppressed be 2/3.

Description of drawings

Fig. 1 is the air pressure loop diagram of wanting portion of the adhesive applicating apparatus of an embodiment the present invention relates to of expression.

Fig. 2 is the flow chart of the order of the liquid ejection action carried out of the adhesive applicating apparatus of expression present embodiment.

Fig. 3 is the flow chart that is illustrated in the loop initialization of the open and close valve that carries out when the liquid ejection is moved.

Fig. 4 is the flow chart of the effluxion of the liquid ejection action carried out of the adhesive applicating apparatus of expression present embodiment.

Fig. 5 (A) is the expression present embodiment illustrated key diagram in liquid when ejection of relating to.

Fig. 5 (B) is the illustrated key diagram of the residual pressure that relates to of expression present embodiment when eliminating fast.

Fig. 5 (C) is the illustrated key diagram when atmosphere opening that the expression present embodiment relates to.

The specific embodiment

With reference to the accompanying drawings, at length describe for embodiments of the present invention.

In Fig. 1, the adhesive applicating apparatus of present embodiment (liquid ejection apparatus) has: syringe 10, and it is installed on the boarded head (not shown) that utilizes Z axle driving mechanism and move up and down, and is filled with bonding agent (liquid); And the air pressure source 12 that constitutes by compressor etc., it supplies with forced air by pipe arrangement to this syringe, and the bonding agent of filling is sprayed from leading section.

In this adhesive applicating apparatus, the ejector (jet type vacuum generator) 14 with negative pressure generation function is set between syringe 10 and air pressure source 12.As this ejector 14,, then can make to attract mouthful 14C to produce a negative pressure if discharge from exhaust outlet 14B to the forced air of its air supply opening 14A supply.

In the present embodiment, aforementioned syringe 10 links with the attraction mouth 14C of this ejector 14, and aforementioned air pressure source 12 links via the air supply opening 14A of the regulator 16 of adjusting air pressure with this ejector 14.

Between the air supply opening 14A of aforementioned air pressure source 12 and aforementioned ejector 14, with regulator 16 splits ground configuration air feed open and close valve 18, in addition, outlet side configuration exhaust open and close valve 20 at the exhaust outlet 14B of aforementioned ejector 14, and this exhaust open and close valve 20 is communicated with atmospheric side via muffler 22.In addition, on the pipe arrangement that the attraction mouth 14C with aforementioned syringe 10 and ejector 14 links, the pressure gauge 24 of the pressure in this pipe arrangement of installation and measuring.

In addition, in the present embodiment, aforementioned air feed open and close valve 18 and exhaust open and close valve 20 constitute by magnetic valve, utilize the solenoidal on-off action of control part (control module) 26 each magnetic valve of control.

Specifically, utilize this control part 26 to carry out following control: by the air feed open and close valve is opened, exhaust open and close valve 20 is closed, to import to aforementioned syringe 10, carry out the ejection of bonding agent via the malleation that attracts mouthful 14C will be supplied to air supply opening 14A; By opening exhaust open and close valve 20 under the state of opening at air feed open and close valve 18, make the negative pressure of ejector 14 produce function and work, thereby from inlet port 14C to exhaust outlet 14B direct high pressure air, residual pressures in the aspirating syringe 10 and eliminating fast; And, make syringe 10 inside to atmosphere opening by under the state that exhaust open and close valve 20 is opened, closing air feed open and close valve 18.

According to the flow chart of Fig. 2, Fig. 3,, the effect of the present embodiment that is made of above structure is described with reference to the time graph of Fig. 4.

At first carry out the initialization of open and close valve by step 0.Specifically, shown in the subprogram of Fig. 3, make it become original state shown in Figure 1, that is, air feed open and close valve 18 closed, make exhaust open and close valve 20 become open state, with syringe 10 inside to atmosphere opening.

After the initialization of this open and close valve finished, the step 1 of the number of times that puts rules into practice was to the coating do action of step 13.

Specifically, the boarded head (not shown) that makes mounting of syringe 10 moves to the coating position that (step 1) is closed exhaust open and close valve (step 2) in timing t 1.

Then, (step 3) is waiting for that (step 4) is opened (step 5) in timing t 3 with air feed open and close valve 18 after the predefined stipulated time to utilize Z axle motor to make boarded head begin to descend in timing t 2.

Then, after waiting for the stipulated time (step 6), in timing t 4 exhaust open and close valve 20 is opened (step 7), and after waiting for the stipulated time (step 8), (step 9) is finished (step 10) in the decline of timing t 6 boarded heads to close the air feed open and close valve in timing t 5.Then, (step 11), (step 12) is finished if boarded head rises, and then finishes a coating action (step 13) to make boarded head begin to rise in timing t 7 after waiting for the stipulated time.

In the present embodiment, Fig. 4 illustrates the variation in time of syringe internal pressure, as shown in the figure, in the process of the residual pressure in aspirating syringe, stop under the atmospheric state attracting just reaching because be difficult at every turn, so after attracting action, carry out to the opening of atmosphere, thereby prevent the leakage of bonding agent or enter in the syringe in timing t 5.

Present embodiment according to above detailed description, by closing exhaust open and close valve 20 and opening the air feed open and close valve, shown in the diagram of Fig. 5 (A), because make the gas-pressurized of the air supply opening 14A that is supplied to ejector 14, import in the syringe 10 via the inlet port 14C of ejector 14, so can be with the bonding agent in the syringe 10 from its leading section ejection.In addition, 10A represents buoy among the figure, and L represents bonding agent, and S represents substrate.

In addition, by under the state that air feed open and close valve 18 is opened, opening exhaust open and close valve 20, shown in the diagram of Fig. 5 (B), the negative pressure that can utilize ejector 14 to be had produces function, from the gas-pressurized of attraction mouth 14C in exhaust outlet 14B aspirating syringe 10 of ejector 14.

In addition, timing by no residual pressure in syringe 10, close the air feed open and close valve, shown in the diagram of Fig. 5 (C), because can make the inside of syringe 10 become state to atmosphere opening, original state before making it revert to the bonding agent ejection, thus can be after ready for ejection next time, beginning ejection action next time.

Therefore, because only use 2 magnetic valves, just can in syringe 10, switch malleation, negative pressure fast, to this three state of atmosphere opening, so can realize adhesive applicating efficiently.

Claims

1. liquid ejection apparatus, it has:

Syringe, its fill liquid; And

Air pressure source, it supplies with forced air to this syringe, and the liquid of filling is sprayed from leading section,

It is characterized in that having:

Ejector, it has negative pressure and produces function, and the attraction mouth of this ejector and aforementioned syringe link, and air supply opening and aforementioned air pressure source link;

The air feed open and close valve, it is configured between the air supply opening of aforementioned air pressure source and aforementioned ejector; And

The exhaust open and close valve, it is configured in the outlet side of the exhaust outlet of aforementioned ejector.

2. liquid ejection apparatus as claimed in claim 1 is characterized in that, has the control module that sprays control, and this ejection control may further comprise the steps:

The air feed open and close valve is opened, the exhaust open and close valve is closed and carry out liquid ejection;

Under the state that the air feed open and close valve is opened, open the exhaust open and close valve and the interior residual pressure of aspirating syringe; And

Under the state that the exhaust open and close valve is opened, close the air feed open and close valve and make syringe inside to atmosphere opening.