WO2013118669A1 - 液体材料の吐出装置および吐出方法 - Google Patents
液体材料の吐出装置および吐出方法 Download PDFInfo
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- WO2013118669A1 WO2013118669A1 PCT/JP2013/052448 JP2013052448W WO2013118669A1 WO 2013118669 A1 WO2013118669 A1 WO 2013118669A1 JP 2013052448 W JP2013052448 W JP 2013052448W WO 2013118669 A1 WO2013118669 A1 WO 2013118669A1
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- Prior art keywords
- liquid material
- piston chamber
- chamber
- piston
- liquid
- Prior art date
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
- B05C11/1002—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves
- B05C11/1034—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves specially designed for conducting intermittent application of small quantities, e.g. drops, of coating material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
- B05C5/0225—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work characterised by flow controlling means, e.g. valves, located proximate the outlet
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
- B05B1/3033—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head
- B05B1/304—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve
- B05B1/3046—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a lift valve the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve element and its actuating means, generally in the proximity of the outlet orifice
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
- B05C5/0225—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work characterised by flow controlling means, e.g. valves, located proximate the outlet
- B05C5/0237—Fluid actuated valves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
- B05C5/027—Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated
- B05C5/0275—Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated flow controlled, e.g. by a valve
- B05C5/0279—Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated flow controlled, e.g. by a valve independently, e.g. individually, flow controlled
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
- B05C5/0291—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work the material being discharged on the work through discrete orifices as discrete droplets, beads or strips that coalesce on the work or are spread on the work so as to form a continuous coating
Definitions
- the present invention relates to a liquid material discharge apparatus and a discharge method capable of supplying sufficient compressed air to continuously perform a discharge operation at a high speed.
- liquid is discharged from the discharge port by rapidly stopping the plunger after it is rapidly advanced toward the discharge port in the liquid chamber having the discharge port. What discharges in the state of a droplet is known.
- the patent proposed by the applicant is a liquid droplet dispensing apparatus that rapidly stops by bringing the tip of the plunger into contact with the valve seat and ejects the liquid by ejecting it from the valve outlet to form a droplet.
- Document 1 There is a device described in Document 1.
- an object of the present invention is to provide a liquid material discharge device and a discharge method that can be continuously discharged at a high tact time compared to the conventional technology, while being small.
- the present invention comprises the following technical means.
- a liquid chamber that communicates with the discharge port, is supplied with a liquid material, is connected to a piston, and a plunger that moves forward and backward in the liquid chamber in a state where the tip is not in contact with the side surface of the liquid chamber.
- An elastic body that applies a biasing force to the jar, a main body provided with a piston chamber in which the piston is disposed, and a pressurized gas supplied from a compressed gas source is supplied to the piston chamber, or a pressurized gas is supplied from the piston chamber.
- a discharge device comprising a discharge solenoid valve and a control device for controlling the operation of the solenoid valve, wherein the solenoid valve comprises a plurality of solenoid valves connected in parallel to a piston chamber. It is a discharge device.
- a holder including a holding member that holds the plurality of solenoid valves, and a relay member that has an internal flow path that communicates the plurality of solenoid valves and the piston chamber.
- the holding member has a supply port that communicates with a compressed gas source, and a plurality of delivery ports that distribute the compressed gas supplied to the supply port to the plurality of electromagnetic valves, and the relay member includes the plurality of electromagnetic waves.
- a third invention is characterized in that, in the second invention, the relay member has a plurality of internal flow paths for communicating each of the plurality of electromagnetic valves with a piston chamber.
- the holder is detachably fixed to the main body.
- the electromagnetic valve is composed of three or four electromagnetic valves.
- the control device performs communication between the compressed gas source and the piston chamber by the electromagnetic valve at different timings for each electromagnetic valve.
- a seventh invention is characterized in that in any one of the first to sixth inventions, it is a desktop type.
- a liquid chamber that communicates with the discharge port, is supplied with a liquid material, is connected to a piston, and a plunger that moves forward and backward in the liquid chamber in a state in which the tip is not in contact with the side surface of the liquid chamber.
- An elastic body that applies urging force to the jar, a main body provided with a piston chamber in which the piston is disposed, and pressurized gas supplied from a compressed gas source is supplied to the piston chamber, or pressurized gas is supplied from the piston chamber.
- a discharge device comprising a discharge solenoid valve and a control device for controlling the operation of the solenoid valve
- the solenoid valve is constituted by a plurality of solenoid valves connected in parallel to a piston chamber, and the plurality of solenoid valves
- the first step of communicating the compressed gas source and the piston chamber at a desired timing, the second step of simultaneously communicating the piston chamber and the atmosphere by the plurality of solenoid valves, the first and second steps to repeat the droplets 3rd work to discharge continuously
- the plurality of electromagnetic valves communicate the compressed gas source and the piston chamber at the same time. According to a tenth aspect, in the eighth aspect, in the first step, the plurality of electromagnetic valves sequentially communicate the compressed gas source and the piston chamber.
- An eleventh aspect of the invention is the eighth, ninth or tenth aspect of the invention, wherein the pressurized gas distributed and supplied from one compressed gas source to the plurality of electromagnetic valves is passed through one flow path communicating with each electromagnetic valve. And supplying to the piston chamber.
- a twelfth aspect of the present invention is the eighth, ninth or tenth aspect of the present invention, wherein the plurality of solenoid valves are provided with a plurality of flows in which the pressurized gas distributed and supplied from one compressed gas source communicates with each solenoid valve in a one-to-one relationship. It supplies to the said piston chamber through a channel
- a thirteenth invention is characterized in that, in any one of the eighth to twelfth inventions, the solenoid valve comprises three or four solenoid valves.
- the plunger in the second step, the plunger is moved in a state where the tip of the plunger is not in contact with the inner wall of the liquid chamber in the advance movement direction of the plunger. It is characterized by discharging liquid droplets by applying an inertial force to the liquid material by moving forward and stopping.
- in the third step at least 300 droplets per second are continuously ejected.
- FIG. 1 It is principal part sectional drawing of the discharge apparatus which concerns on 1st embodiment. It is a perspective view explaining a solenoid valve device.
- (a) is a perspective view of the electromagnetic valve device
- (b) is a perspective view in a state in which (a) is disassembled.
- It is a rear view of each member which comprises a holder.
- (a) is a rear view of the gripping member
- (b) is a rear view of the relay member.
- (a) is a case where it opens simultaneously
- (b) is a case where it opens at a different time.
- FIG. 1 is a cross-sectional view of a main part of a discharge device 1 according to the first embodiment.
- the discharge port 11 side may be referred to as the front
- the micrometer 42 side may be referred to as the rear.
- the discharge part 10 and the pressure supply part 50 which comprise the discharge apparatus 1 are demonstrated.
- the discharge unit 10 includes main body 2 having a piston chamber 20, a piston 30 disposed in the piston chamber 20, and a nozzle block 3 in which the nozzle member 4 is disposed as main components.
- the piston chamber 20 is divided into a front piston chamber 21 and a rear piston chamber 22 by a piston 30.
- the piston 30 has a seal on the side peripheral surface, and is slidably sealed in a state of being in close contact with the piston chamber 20.
- the front piston chamber 21 communicates with the pressure supply unit 50 via the air flow path 49.
- the piston 30 moves backward, and when the compressed air in the front piston chamber 21 is discharged from the air flow path 49, the piston 30 moves forward by the biasing force of the spring 40.
- the piston 30 is connected to a rod (plunger) 33, and the rod tip 35 also reciprocates in the liquid chamber 13 as the piston 30 reciprocates. At this time, the rod 33 reciprocates without contacting the side surface of the liquid chamber 13.
- the rod tip 35 is seated on the valve seat 15 provided on the bottom surface (or the inner wall in the direction in which the plunger moves forward) in front of the liquid chamber 13, the liquid material is divided and ejected in the form of droplets.
- the piston 30 is also connected to the rear contact member 32.
- a rear stopper 41 that enters the spring chamber 23 is disposed at the rear end of the main body 2.
- the rear stopper 41 limits the rearward movement of the piston 30 by contacting the rear end portion of the rear contact member 32.
- the rear end of the rear stopper 41 is connected to the micrometer 42, and the front and rear positions of the rear stopper 41 can be adjusted by operating the micrometer 42.
- the spring chamber 23 communicates with the atmosphere via the air flow path 24.
- a nozzle block 3 is fixed in front of the main body 2.
- the nozzle member 4 is screwed to the nozzle block.
- a liquid material supply path 12 communicating with a liquid storage container (not shown) is provided on the side of the nozzle block. The liquid material is supplied from the liquid material supply path 12 to the liquid chamber 13 in the nozzle block.
- FIG. 2 is a perspective view for explaining an electromagnetic valve device constituting the pressure supply unit 50
- FIG. 3 is a rear view of each member constituting the holder.
- the electromagnetic valve device integrally disposed on the side of the discharge unit 10 includes an electromagnetic valve A61 and an electromagnetic valve B62, and a holder 70 that holds the electromagnetic valve AB.
- the solenoid valves 61 and 62 are switching valves that enable switching between a first position that communicates a pressurized gas source (not shown) and the piston chamber 20 and a second position that communicates the piston chamber 20 and the atmosphere.
- the opening / closing speed and flow rate are the same.
- the operations of the electromagnetic valves 61 and 62 are controlled by a control unit 90 (not shown).
- the electromagnetic valves 61 and 62 are unitized while being held by the holder 70, and can be handled integrally. It should be noted that a pressure reducing valve may be provided in the holder 70 so that air pressure adjusted to a desired pressure is supplied to the electromagnetic valve.
- the electromagnetic valve A61 includes an air supply port A66, an air discharge port A67, and an air outlet (not shown) provided on the back surface. The air outlet is communicated with one of the air supply port A66 and the air discharge port A67 by the action of the electromagnetic valve A61.
- the electromagnetic valve B62 includes an air supply port B68, an air discharge port B69, and an air outlet (not shown) provided on the back surface. The air outlet is communicated with one of the air supply port B68 and the air discharge port B69 by the action of the electromagnetic valve B62.
- the holder 70 includes a gripping member (holding member) 71 and a relay member 72, and the gripping member 71 and the relay member 72 are fixed so as to be disassembled.
- the gripping member 71 has an air supply port 73 and an exhaust port 74 on the front surface, an air outlet A75, an air inlet A76, an air outlet B77, and an air inlet B78 on the rear surface.
- a flow path for branching the supplied air is formed.
- the channel length from the air supply port 73 to the air delivery port A75 is the same as the channel length from the air supply port 73 to the air delivery port B77.
- the flow path length from the air inlet A76 to the discharge port 74 is the same as the flow path length from the air inlet B78 to the discharge port 74.
- the relay member 72 has an air receiving port A79 and an air receiving port B80 on the front, and an air sending port 81 on the back.
- the relay member 72 fixes the solenoid valve AB to the side surface of the main body 2 in a detachable manner.
- the flow path length from the air supply port A66 to the air flow path 49 and the flow path length from the air supply port B68 to the air delivery port 81 are configured the same. Further, the flow path length from the air delivery port 81 to the air discharge port A67 and the flow path length from the air delivery port 81 to the air discharge port B69 are also configured the same.
- a path until air supplied from a pressurized gas source (not shown) to the air supply port 73 via the pressure reducing valve is sent to the front piston chamber 21 will be described.
- the electromagnetic valve AB is simultaneously opened and closed by the control unit 90.
- the compressed air supplied to the air supply port 73 is branched in the gripping member 71 and supplied from the air delivery port A75 to the air supply port A66 and from the air delivery port B77 to the air supply port B68.
- the compressed air supplied to the air supply port A66 passes through the internal flow path of the electromagnetic valve A61, and is sent from the air outlet (not shown) of the electromagnetic valve A61 to the air receiving port A79 of the relay member 72.
- the compressed air supplied to the air supply port B68 passes through the internal flow path of the electromagnetic valve B62, and is sent from the air outlet (not shown) of the electromagnetic valve B62 to the air receiving port B80 of the relay member 72. It is done.
- the air supplied to the air receiving port A79 and the air receiving port B80 merges in the internal flow path of the relay member 72, and is supplied from the air delivery port 81 of the relay member 72 to the air flow path 49.
- the air received from one pressure supply port is supplied by branching the flow path to each of the two solenoid valves arranged in parallel, and the air that has passed through the solenoid valve is merged again to obtain one pressure. It is possible to send from the delivery port to the discharge part. Unlike this, it is also possible to shift the timing at which the solenoid valve AB opens and closes. For example, the movement of the piston (plunger) can be made smooth by changing the flow rate of the air flowing into the air chamber with a slight shift with the timing of opening the solenoid valve AB. Thereby, it becomes possible to prevent the occurrence of cavitation in the liquid chamber during the piston (plunger) retreat operation.
- FIG. 4 is a graph showing the relationship between the number of solenoid valves and the opening timing and the pressure arrival time.
- This graph shows the pressure change in the pressure chamber when the solenoid valve is opened and pressure is supplied to the pressure chamber.
- (A) is arranged in parallel with the pressure change when one solenoid valve is opened. It is a pressure change figure when two solenoid valves are opened simultaneously
- (b) is a pressure when shifting the pressure change when opening one solenoid valve and the opening timing of two solenoid valves arranged in parallel FIG.
- the dotted line in the figure shows the pressure change in one solenoid valve in both (a) and (b).
- (a) is a graph when two solenoid valves (valve 1, valve 2) having the same specifications are opened at different timings.
- the pressure in the pressure chamber increases in the same curve as when one solenoid valve is opened, and the second solenoid valve (valve 2) is opened. The pressure increase rate increases, and the desired pressure can be reached earlier than that of one solenoid valve.
- the two solenoid valves are opened sequentially at different timings. Thus, it is possible to shorten the tact time while preventing the occurrence of cavitation.
- the number of solenoid valves may be increased as in a sixth embodiment to be described later.
- the air supply amount is increased by arranging the solenoid valves that operate at high speed in parallel without increasing the supply pressure of the pressurized gas source.
- the tact time can be shortened without increasing the weight.
- the plunger rod can be operated at a high speed, not only the work efficiency can be improved, but also a small amount of discharge can be performed.
- the discharge device 1 according to the second embodiment is configured so that the rod tip 35 and the bottom surface in front of the liquid chamber 13 (or the inner wall in the plunger moving direction) are not in contact with each other (that is, not seated).
- the present invention relates to a discharge device that applies an inertial force to a liquid material by advancing movement and advancing stop, and performs flying discharge in a droplet state. Below, only a different part from 1st embodiment is demonstrated and description of the overlapping part is abbreviate
- FIG. 5 is a cross-sectional view of a main part of the discharge device 1 according to the second embodiment.
- a collision part 31 is formed in the advance direction of the piston 30, and the advancement movement of the piston 30 is caused by the collision part 31 colliding with the inner wall (bottom surface) in front of the piston chamber 20. It differs from the first embodiment in that it is suddenly stopped. Since the rod tip 35 is not seated, there is no possibility that rubbing pieces or particles are generated by the seating. Moreover, even when the liquid material contains a solid material such as a filler, it is possible to prevent the deterioration of the discharge accuracy due to crushing or breakage of the solid material, and to discharge without impairing the function and properties of the liquid material. .
- a plunger position determining mechanism that defines the position of the tip of the plunger when the advancement is stopped to a desired position in the vicinity of the inner wall (bottom surface) of the liquid chamber in the advancement direction (Patent Document) 2) may be incorporated.
- the solenoid valves 61 and 62 and the holder 70 have the same configuration as in the first embodiment.
- the discharge device 1 according to the third embodiment relates to a discharge device in which two parallel-connected solenoid valves that supply compressed gas are connected to a piston chamber through different flow paths. Below, only a different part from 2nd embodiment is demonstrated, and description of the overlapping part is abbreviate
- FIG. 6 is a cross-sectional view of a main part of the discharge device 1 according to the third embodiment.
- the description corresponding to the pressure supply unit 50 of FIG. 1 is omitted, and the electromagnetic valve A61, the electromagnetic valve B62, and the control unit 90 are mainly illustrated.
- the discharge device 1 of the present embodiment is different from the second embodiment in that the relay member 72 constituting the holder 70 includes two air outlets 81 and 81 communicating with the air flow path 49. That is, the air delivery port 81a of the relay member 72 communicates with the air receiving port A79, and the air delivery port 81b communicates with the air receiving port B80.
- the discharge device 1 according to the fourth embodiment relates to a discharge device in which a spring 40 is disposed below the piston 30. Below, only a different part from 1st embodiment is demonstrated and description of the overlapping part is abbreviate
- the syringe 8 and the liquid material supply path 12 are connected via the tube 9, but this portion has the same configuration in the first to third embodiments.
- FIG. 7 is a cross-sectional view of a main part of the discharge device 1 according to the fourth embodiment.
- the discharge device 1 according to the present embodiment is different from the first embodiment in that a spring 40 is arranged in the advancing direction of the piston 30 and the piston 30 is moved forward by supplying compressed gas to the rear piston chamber 22. Is different. That is, when pressurized gas is supplied to the piston chamber via the electromagnetic valves 61 and 62, the piston 30 moves forward, and when the pressurized gas is discharged from the piston chamber via the electromagnetic valves 61 and 62, the piston 30 moves to the spring 40. It moves backward by the urging force.
- the rod tip 35 is seated on the valve seat 15 provided on the inner wall (bottom surface) in front of the liquid chamber 13, so that the liquid material is divided and ejected in the form of droplets.
- the electromagnetic valves 61 and 62 are built in the pressure supply unit 51.
- the pressure supply unit 51 is provided with an air outlet 81 on the back surface, and is attached to the main body 2 so that the air outlet 81 and the air flow path 24 communicate with each other.
- the pressure supply unit 51 has an air supply port 73 and an air discharge port 74 on the front, and the air supply port 73 communicates with a pressurized gas source via a pressure reducing valve 94.
- a discharge device 1 according to the fifth embodiment relates to a discharge device of a type in which a liquid material comes into contact with a work before being separated from a discharge port (a method of opening and closing a discharge flow path at the tip of a shaft body).
- a discharge port a method of opening and closing a discharge flow path at the tip of a shaft body.
- FIG. 8 is a cross-sectional view of a main part of the discharge device 1 according to the fifth embodiment.
- the liquid is discharged by opening and closing the flow path where the tip 35 of the rod connected to the piston 30 communicates with the discharge port 11.
- the liquid is not discharged by the action of the inertia force of the rod 33, but is discharged by the action of the air pressure applied to the storage tank 97.
- the air pressure supplied from the pressure supply source is adjusted to a desired pressure by the pressure reducing valve 95 via the air tube 6 and supplied to the storage tank 97 in which the liquid material is stored.
- the pressurized liquid material in the storage tank 97 is supplied to the liquid material supply path 12 of the discharge device 1 through the liquid tube 9 from the pipe 96 whose tip is disposed near the bottom surface in the storage tank 97. Then, it is supplied to the liquid chamber 13 communicating with the liquid material supply path 12.
- the liquid chamber 13 is configured such that the tip in the discharge direction is opened and closed by the tip 35 of the rod 33 of the discharge device 1, and when the tip 35 of the rod 33 is seated on the valve seat 15, the discharge port 11 of the liquid chamber 13 and the nozzle member 4. The flow path connecting the two is blocked.
- the storage tank 97 stores, for example, several liters to several tens of liters of liquid material.
- the pressure supply unit 51 has the same configuration as that of the fifth embodiment. By sequentially opening the two solenoid valves at different timings, it is possible to smoothen the movement of the backward movement of the rod 33 and prevent cavitation.
- FIG. 9 is a cross-sectional view of a main part of the discharge device 1 according to the sixth embodiment.
- description of the part corresponding to the pressure supply part 50 of FIG. 1 is abbreviate
- the discharge device 1 of the present embodiment is different from the second embodiment in that the number of electromagnetic valves is four and the holder 70 has a structure that holds four electromagnetic valves.
- the solenoid valves 61 to 64 have the same configuration as in the first and second embodiments.
- the gripping member 71 has an air supply port 73 and a discharge port 74 on the front surface, and four air delivery ports A to D and four air inflow ports A to D on the back surface.
- the relay member 72 includes four air receiving ports A to D. The flow paths connected to the air receiving ports A to D are merged, and pressurized air is sent from one pressure delivery port 81 to the discharge unit.
- the number of solenoid valves is large, it is preferable from the viewpoint of miniaturization to send pressurized air to the discharge section after joining the flow paths connected to the respective solenoid valves.
- the discharge device 1 of the present embodiment is suitable for performing a stepwise opening of the electromagnetic valve. That is, in the four solenoid valves arranged in parallel, the first solenoid valve is first opened, and then the second solenoid valve, the third solenoid valve, the fourth solenoid valve, and each solenoid valve are sequentially opened. Compared with the case where these four solenoid valves are simultaneously opened, the flow rate at the start of air supply to the air chamber can be lowered, so that the movement of the backward movement of the piston 30 can be made smoother.
- the present invention can be applied to a technique of discharging a liquid material by repeatedly reciprocating a shaft body called a plunger, a valve shaft, or a rod at high speed.
- a discharge method that contacts the workpiece after the liquid material is separated from the discharge portion a discharge method that contacts the workpiece before the liquid material is separated from the discharge portion (discharge flow path at the tip of the shaft body) It can also be applied to a method of opening and closing.
- Discharge device 2 Main body 3: Discharge block 4: Nozzle member 5: Air supply device 6: Air tube 7: Adapter 8: Liquid storage container (syringe) 9: Liquid tube 10: Discharge unit 11: Discharge port 12: Liquid Material supply path 13: Liquid chamber 14: Discharge flow path 15: Valve seat 20: Piston chamber 21: Front piston chamber 22: Rear piston chamber 23: Spring chamber 24: Air flow path 30: Piston 31: Collision part 32: Rear contact Contact member 33: Rod 35: Tip 40: Spring 41: Back stopper 42: Micrometer 49: Air flow path 50: Pressure supply unit (solenoid valve device) 51: Pressure supply unit 61: Solenoid valve A 62: Solenoid valve B 63 : Solenoid valve C 64: Solenoid valve D 65: Solenoid valve E 66: Air supply port A 67: Air discharge port A 68: D Supply port B 69: Air discharge port B 70: Holder 71: Holding member 72: Relay
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- Magnetically Actuated Valves (AREA)
Abstract
Description
高タクト化を実現するためには、プランジャーの作動用エアを高圧化することが有効である。しかし、この方法では、吐出装置内の流路等を高耐圧仕様にしなければならず、装置が大型化、高重量化してしまうという問題が生じる。卓上での作業を前提とすると、装置の大型化、高重量化は避けなくてならない。
第2の発明は、第1の発明において、前記複数の電磁弁を保持する保持部材と、前記複数の電磁弁とピストン室とを連通する内部流路を有する中継部材を含んでなるホルダーを備え、前記保持部材が、圧縮気体源と連通する供給口および、供給口に供給された圧縮気体を前記複数の電磁弁に分配する複数の送出口を有し、前記中継部材が、前記複数の電磁弁とピストン室とを連通する内部流路を有することを特徴とする。
第3の発明は、第2の発明において、前記中継部材が、前記複数の電磁弁のそれぞれをピストン室と連通する複数の内部流路を有することを特徴とする。
第5の発明は、第1ないし4のいずれかの発明において、前記電磁弁が、三または四個の電磁弁からなることを特徴とする。
第6の発明は、第1ないし5のいずれかの発明において、前記制御装置が、前記電磁弁による前記圧縮気体源と前記ピストン室との連通を、各電磁弁につき異なるタイミングで行うことを特徴とする。
第7の発明は、第1ないし6のいずれかの発明において、卓上型であることを特徴とする。
第10の発明は、第8の発明において、前記第1工程において、前記複数の電磁弁が、圧縮気体源とピストン室を順次連通することを特徴とする。
第12の発明は、第8、9または10の発明において、前記複数の電磁弁に、一の圧縮気体源から分配供給された加圧気体を、各電磁弁と一対一で連通する複数の流路を介して前記ピストン室に供給することを特徴とする。
第13の発明は、第8ないし12のいずれかの発明において、前記電磁弁が、三または四個の電磁弁からなることを特徴とする。
第14の発明は、第8ないし13のいずれかの発明において、前記第2工程において、前記プランジャーの先端とプランジャーの進出移動方向にある液室の内壁が非接触の状態でプランジャーを進出移動および進出停止することで液材に慣性力を与えて液滴の状態に吐出することを特徴とする。
第15の発明は、第8ないし14のいずれかの発明において、前記第3工程において、毎秒300発以上の液滴を連続吐出することを特徴とする。
《第一実施形態》
第一実施形態に係る吐出装置1は、ピストン室に圧縮気体を供給する並列接続された二つの電磁弁を備える吐出装置に関する。図1は、第一実施形態に係る吐出装置1の要部断面図である。以下では、説明の便宜上、吐出口11側を前方、マイクロメータ42側を後方、という場合がある。
吐出装置1を構成する吐出部10および圧力供給部50について説明する。
吐出部10は、ピストン室20を有する本体2と、ピストン室20に配置されたピストン30と、ノズル部材4が配設されるノズルブロック3とを主要な構成要素とする。
ピストン室20は、ピストン30により前方ピストン室21と後方ピストン室22とに分断されている。ピストン30は、側周面にシールを有しており、ピストン室20に密着した状態で摺動可能にシールされている。
本体2の後端には、バネ室23に侵入する後方ストッパー41が配設されている。後方ストッパー41は、後方当接部材32の後端部と当接することにより、ピストン30の後方移動を制限する。後方ストッパー41の後端は、マイクロメータ42に接続されており、マイクロメータ42を操作することで、後方ストッパー41の前後位置を調整可能である。
バネ室23は、エア流路24を介して大気と連通している。
図2は、圧力供給部50を構成する電磁弁装置を説明する斜視図であり、図3は、ホルダーを構成する各部材の背面図である。
吐出部10の側方に一体的に配置される電磁弁装置は、電磁弁A61および電磁弁B62と、電磁弁ABを保持するホルダー70とを備えて構成される。
電磁弁61,62は、図示しない加圧気体源とピストン室20とを連通する第一の位置およびピストン室20と大気とを連通する第二の位置を切換可能とする切換弁であり、弁開閉速度および流量は同一である。電磁弁61,62の動作は、図示しない制御部90により制御される。電磁弁61,62は、ホルダー70により保持された状態でユニット化され、一体的な取り扱いが可能である。なお、ホルダー70に減圧弁を設け、電磁弁に所望の圧力に調整されたエア圧が供給されるようにしてもよい。
電磁弁B62は、エア供給口B68、エア排出口B69および背面に設けられたエア送出口(図示せず)を備えている。このエア送出口は、電磁弁B62の作用によりエア供給口B68またはエア排出口B69の一方と連通される。
掴持部材71は、正面にエア供給口73および排出口74を、背面にエア送出口A75、エア流入口A76、エア送出口B77およびエア流入口B78を有し、内部にエア供給口73に供給されたエアを分岐する流路が形成されている。エア供給口73からエア送出口A75までの流路長とエア供給口73からエア送出口B77までの流路長は同一である。また、エア流入口A76から排出口74までの流路長とエア流入口B78から排出口74までの流路長も同一である。
エア供給口73に供給された圧縮エアは、掴持部材71内で分岐され、エア送出口A75からエア供給口A66へ、エア送出口B77からエア供給口B68へ供給される。
エア供給口A66に供給された圧縮エアは、電磁弁A61の内部流路を通過し、電磁弁A61のエア送出口(図示せず)から、中継部材72のエア受取口A79に送られる。同様に、エア供給口B68に供給された圧縮エアは、電磁弁B62の内部流路を通過し、電磁弁B62のエア送出口(図示せず)から、中継部材72のエア受取口B80に送られる。エア受取口A79と、エア受取口B80に供給されたエアは、中継部材72の内部流路で合流し、中継部材72のエア送出口81からエア流路49に供給される。
これとは異なり、電磁弁ABが開閉するタイミングをずらすことも可能である。例えば、電磁弁ABの開くタイミング僅かにずらして空気室に流れ込むエアの流量を経時変化させることにより、ピストン(プランジャー)の後退動作の動きだしをなめらかにすることも可能である。これにより、ピストン(プランジャー)後退動作時の液室内のキャビテーションの発生を防ぐことが可能となる。
(b)は、同じ仕様の二の電磁弁(valve 1, valve 2)をタイミングをずらして開いた場合のグラフである。この場合、圧力室内の圧力は、当初は1つの電磁弁(valve 1)のみが開かれるので一の電磁弁が開いた場合と同じ曲線で増加し、2つめの電磁弁(valve 2)が開くと圧力上昇率が高まり、一の電磁弁よりも早く所望の圧力に達することができる。
また、装置を大型化することなく、液滴の超高速吐出(例えば、毎秒300発以上、好ましくは毎秒400発以上、更に好ましくは毎秒500発以上)を実現することが可能である。プランジャーロッドを高速に作動させることができるようになると、作業効率化が図れることはもちろんのこと、さらなる微量吐出も可能となる。
第二実施形態に係る吐出装置1は、ロッド先端35と液室13の前方にある底面(或いはプランジャーの進出移動方向にある内壁)が非接触の状態で(すなわち着座しないで)プランジャーを進出移動および進出停止することで液材に慣性力を与え、液滴の状態で飛翔吐出する吐出装置に関する。以下では、第一実施形態と異なる部分のみ説明し、重複する部分の説明は省略する。
図5には記載していないが、進出停止時のプランジャーの先端部の位置を、その進出方向にある液室の内壁(底面)近傍の所望位置に規定するプランジャー位置決定機構(特許文献2参照)を組み込んでもよい。
電磁弁61,62およびホルダー70は、第一実施形態と同じ構成のものである。
第三実施形態に係る吐出装置1は、圧縮気体を供給する並列接続された二つの電磁弁が異なる流路でピストン室に接続される吐出装置に関する。以下では、第二実施形態と異なる部分のみ説明し、重複する部分の説明は省略する。
第四実施形態に係る吐出装置1は、ピストン30の下方にバネ40を配置した吐出装置に関する。以下では、第一実施形態と異なる部分のみ説明し、重複する部分の説明は省略する。なお、図7では、シリンジ8と液材供給路12がチューブ9を介して接続されているが、この部分は第一ないし第三実施形態も同じ構成となっている。
第五実施形態に係る吐出装置1は、液体材料が吐出口から離間する前にワークに接触するタイプ(軸体の先端で吐出流路を開閉する方式)の吐出装置に関する。以下では、第四実施形態と異なる部分のみ説明し、重複する部分の説明は省略する。
図8は、第五実施形態に係る吐出装置1の要部断面図である。本実施形態の吐出装置1は、ピストン30と連結されたロッドの先端35が吐出口11と連通する流路を開閉することで、液体の吐出が行われる。液体は、ロッド33の慣性力の作用により吐出されるのではなく、貯留タンク97に印加されたエア圧の作用により吐出される。
第六実施形態に係る吐出装置1は、並列接続された四つの電磁弁を備える吐出装置に関する。以下では、第二実施形態と異なる部分のみ説明し、重複する部分の説明は省略する。
図9は、第六実施形態に係る吐出装置1の要部断面図である。図9では、図1の圧力供給部50に対応する部分の記載を省略し、主として電磁弁A61、電磁弁B62、電磁弁C63、電磁弁D64および制御部90を図示している。
電磁弁61~64は、第一および第二実施形態と同じ構成のものである。掴持部材71は、正面にエア供給口73および排出口74を有し、背面に4つのエア送出口A~Dと4つのエア流入口A~Dを有する。中継部材72は、4つのエア受取口A~Dを備えており、エア受取口A~Dにつながる流路は合流され、一の圧力送出口81から吐出部へ加圧エアを送出する。電磁弁の数が多い場合は、各電磁弁につながる流路を合流させてから吐出部へ加圧エアを送出することが、小型化の観点からは好ましい。
また、液体材料が吐出部から離間した後にワークに接触するタイプの吐出方式のみならず、液体材料が吐出部から離間する前にワークに接触するタイプの吐出方式(軸体の先端で吐出流路を開閉する方式)にも適用することができる。
Claims (15)
- 吐出口と連通し、液体材料が供給される液室と、
ピストンと連結され、先端が液室の側面と非接触の状態で液室内を進退動するプランジャーと、
プランジャーに付勢力を与える弾性体と、
ピストンが配設されるピストン室が設けられた本体と、
圧縮気体源から供給される加圧気体をピストン室に供給し、またはピストン室から加圧気体を排出する電磁弁と、
前記電磁弁の動作を制御する制御装置を備える吐出装置であって、
前記電磁弁が、ピストン室に並列接続された複数の電磁弁からなることを特徴とする液体材料の吐出装置。 - 前記複数の電磁弁を保持する保持部材と、前記複数の電磁弁とピストン室とを連通する内部流路を有する中継部材を含んでなるホルダーを備え、
前記保持部材が、圧縮気体源と連通する供給口および、供給口に供給された圧縮気体を前記複数の電磁弁に分配する複数の送出口を有し、
前記中継部材が、前記複数の電磁弁とピストン室とを連通する内部流路を有することを特徴とする請求項1記載の液体材料の吐出装置。 - 前記中継部材が、前記複数の電磁弁のそれぞれをピストン室と連通する複数の内部流路を有することを特徴とする請求項2記載の液体材料の吐出装置。
- 前記ホルダーが、前記本体に着脱自在に固定されることを特徴とする請求項2または3記載の液体材料の吐出装置。
- 前記電磁弁が、三または四個の電磁弁からなることを特徴とする請求項1ないし4のいずれかに記載の液体材料の吐出装置。
- 前記制御装置が、前記電磁弁による前記圧縮気体源と前記ピストン室との連通を、各電磁弁につき異なるタイミングで行うことを特徴とする請求項1ないし5のいずれかに記載の液体材料の吐出装置。
- 卓上型である請求項1ないし6のいずれかに記載の液体材料の吐出装置。
- 吐出口と連通し、液体材料が供給される液室と、
ピストンと連結され、先端が液室の側面と非接触の状態で液室内を進退動するプランジャーと、
プランジャーに付勢力を与える弾性体と、
ピストンが配設されるピストン室が設けられた本体と、
圧縮気体源から供給される加圧気体をピストン室に供給し、またはピストン室から加圧気体を排出する電磁弁と、
前記電磁弁の動作を制御する制御装置を備える吐出装置を提供し、
前記電磁弁を、ピストン室に並列接続された複数の電磁弁により構成し、
前記複数の電磁弁が、所望のタイミングで圧縮気体源とピストン室を連通する第1工程、
前記複数の電磁弁が、同時にピストン室と大気を連通する第2工程、
第1および第2工程を繰り返すことにより液滴を連続吐出する第3工程を有する液体材料の吐出方法。 - 前記第1工程において、前記複数の電磁弁が、同時に圧縮気体源とピストン室を連通することを特徴とする請求項8の液体材料の吐出方法。
- 前記第1工程において、前記複数の電磁弁が、圧縮気体源とピストン室を順次連通することを特徴とする請求項8の液体材料の吐出方法。
- 前記複数の電磁弁に、一の圧縮気体源から分配供給された加圧気体を、各電磁弁と連通する一の流路を介して前記ピストン室に供給することを特徴とする請求項8、9または10の液体材料の吐出方法。
- 前記複数の電磁弁に、一の圧縮気体源から分配供給された加圧気体を、各電磁弁と一対一で連通する複数の流路を介して前記ピストン室に供給することを特徴とする請求項8、9または10の液体材料の吐出方法。
- 前記電磁弁が、三または四個の電磁弁からなることを特徴とする請求項8ないし12のいずれかに記載の液体材料の吐出方法。
- 前記第2工程において、前記プランジャーの先端とプランジャーの進出移動方向にある液室の内壁が非接触の状態でプランジャーを進出移動および進出停止することで液材に慣性力を与えて液滴の状態に吐出することを特徴とする請求項8ないし13のいずれかに記載の液体材料の吐出方法。
- 前記第3工程において、毎秒300発以上の液滴を連続吐出することを特徴とする請求項8ないし14のいずれかに記載の液体材料の吐出方法。
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WO2017208956A1 (ja) * | 2016-05-30 | 2017-12-07 | 武蔵エンジニアリング株式会社 | 液体材料吐出装置、その塗布装置および塗布方法 |
US11458501B2 (en) | 2016-05-30 | 2022-10-04 | Musashi Engineering, Inc. | Liquid material discharge device, and application device and application method therefor |
WO2017208958A1 (ja) * | 2016-05-31 | 2017-12-07 | 武蔵エンジニアリング株式会社 | 液体材料吐出装置、その塗布装置および塗布方法 |
JP2017213520A (ja) * | 2016-05-31 | 2017-12-07 | 武蔵エンジニアリング株式会社 | 液体材料吐出装置、その塗布装置および塗布方法 |
US11110481B2 (en) | 2016-05-31 | 2021-09-07 | Musashi Engineering, Inc. | Liquid material discharge device, and application device and application method therefor |
JP7506392B2 (ja) | 2020-03-13 | 2024-06-26 | 株式会社サンエイテック | 液剤吐出装置及び液剤吐出方法 |
JP2021049530A (ja) * | 2021-01-06 | 2021-04-01 | 武蔵エンジニアリング株式会社 | 液体材料吐出装置、その塗布装置および塗布方法 |
JP7066229B2 (ja) | 2021-01-06 | 2022-05-13 | 武蔵エンジニアリング株式会社 | 液体材料吐出装置、その塗布装置および塗布方法 |
Also Published As
Publication number | Publication date |
---|---|
US9889463B2 (en) | 2018-02-13 |
MY169189A (en) | 2019-02-25 |
EP2813293A4 (en) | 2015-08-05 |
PH12014501737B1 (en) | 2014-11-10 |
KR20140127306A (ko) | 2014-11-03 |
US20150014362A1 (en) | 2015-01-15 |
EP2813293B1 (en) | 2016-12-28 |
CN104245152B (zh) | 2017-11-07 |
HK1200756A1 (en) | 2015-08-14 |
TW201343267A (zh) | 2013-11-01 |
SG11201404620PA (en) | 2014-11-27 |
CN104245152A (zh) | 2014-12-24 |
JP6055785B2 (ja) | 2017-01-11 |
JPWO2013118669A1 (ja) | 2015-05-11 |
PH12014501737A1 (en) | 2014-11-10 |
KR102046840B1 (ko) | 2019-11-20 |
TWI592217B (zh) | 2017-07-21 |
EP2813293A1 (en) | 2014-12-17 |
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