WO2015137271A1 - 塗布装置および塗布方法 - Google Patents
塗布装置および塗布方法 Download PDFInfo
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- WO2015137271A1 WO2015137271A1 PCT/JP2015/056800 JP2015056800W WO2015137271A1 WO 2015137271 A1 WO2015137271 A1 WO 2015137271A1 JP 2015056800 W JP2015056800 W JP 2015056800W WO 2015137271 A1 WO2015137271 A1 WO 2015137271A1
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- Prior art keywords
- discharge
- discharge ports
- line
- nozzle arrangement
- coating
- 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
- 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
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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
- B05C13/00—Means for manipulating or holding work, e.g. for separate articles
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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
- B05C5/0208—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 for applying liquid or other fluent material to separate articles
- B05C5/0212—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 for applying liquid or other fluent material to separate articles only at particular parts of the articles
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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
- 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
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/26—Processes for applying liquids or other fluent materials performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface
Definitions
- the present invention relates to a coating apparatus and a coating method having a plurality of discharge ports arranged along a straight line.
- a discharge device that discharges a liquid material by a reciprocating plunger is known as a device that distributes a liquid material in a manufacturing process of electronic components and the like. This discharge device is used for, for example, a desired application to a work while being relatively moved in the horizontal direction with respect to the work table.
- a side surface of a plunger rod is disposed in a non-contact manner in a flow path having a valve seat near an outlet connected to the nozzle.
- a liquid material is ejected from a nozzle in a droplet state by moving the tip of the jar rod toward the valve seat and coming into contact with the valve seat (Patent Document 1).
- an ejection nozzle having a plurality of nozzle outlets communicating with the fluid channel outlet, and a valve member movably provided in the fluid channel so as to be selectively contactable with the valve seat.
- a jetting dispenser that imparts sufficient momentum to the liquid material in the fluid channel outlet to quickly eject a plurality of droplets simultaneously from the plurality of nozzle outlets at the time of contact.
- Patent Document 4 discloses a nozzle having a plurality of discharge ports, but mainly focuses on the formation of a flux layer, and does not mention any procedure for performing drawing coating. Moreover, it can be said that Patent Document 4 does not provide a technique that contributes to speeding up the drawing application even in the point that the operation speed of the dispenser is slowed to achieve high quality (see paragraph [0007] of the same document).
- An object of the present invention is to provide a coating apparatus and a coating method capable of increasing the speed of drawing coating.
- the present invention relating to a coating method is a method of linearly applying a drawing line on a coating object using a coating apparatus, wherein the coating apparatus includes a discharge device, a work table on which the coating target is placed, and a discharge device. And a control device for controlling the operation of the discharge device and the drive device, the discharge device having a plurality of discharge ports for discharging a liquid material, and the plurality A liquid chamber that communicates with the discharge port of the liquid chamber via a plurality of discharge flow paths, and a discharge member that contacts the liquid material in the liquid chamber.
- the discharge member applies an inertial force to the liquid material in the liquid chamber.
- the liquid material that has landed along the nozzle arrangement line is applied from the plurality of discharge ports before the plurality of discharged liquid masses have landed on the object to be applied.
- a linear application is performed by discharging a liquid material so as to be bonded on the object.
- maintains the said discharge apparatus and the said work table at a fixed speed
- the discharge timing is constant based on the relative movement speed of the discharge device and the work table so that at least one of the liquid masses is bonded to the liquid material on the application object discharged immediately before to form a drawing line. It is good also as performing linear application
- this invention which concerns on the said coating method, by adjusting the driving force of the said discharge member, before the said several discharged liquid mass contacts an application
- the liquid material may be ejected so that the liquid material that has landed is bonded onto the application target.
- the plurality of discharge flow paths are arranged with an inclination so that each center line of the plurality of discharge flow paths intersects the center line of the nozzle, and the discharge port and the application target The distance h may be adjusted by adjusting the distance h.
- the plurality of discharge ports include an even number of discharge ports, including two large discharge ports and two small discharge ports, both of which are the nozzle arrangement.
- the small discharge ports and the large discharge ports are alternately arranged along the nozzle arrangement line, or the plurality of discharge ports are an even number of discharge ports, Including two large discharge ports and two small discharge port groups, both of the large discharge ports are arranged on the nozzle arrangement line, the small discharge port group and the large discharge port
- the nozzles may be alternately arranged along the nozzle arrangement line, and the small discharge port group may include a plurality of small discharge ports arranged symmetrically with respect to the nozzle arrangement line.
- the discharge device or the work table may include a rotation mechanism, and the rotation mechanism may cause the nozzle arrangement line to coincide with the drawing direction of the drawing line.
- the linear coating is performed according to a coating pattern including a linear coating line extending in a first direction and a linear coating line extending in a second direction different from the first direction.
- the nozzle is detachably fixed to the ejection device, and the ejection device is configured so that the direction of the nozzle arrangement line is constant with respect to the ejection device. It may be characterized by having a positioning mechanism capable of attaching a nozzle.
- the present invention relating to a coating apparatus includes a discharge device, a work table on which an application target is placed, a drive device that relatively moves the discharge device and the work table, and a control unit that controls the operation of the discharge device and the drive device.
- the discharge device comprises a nozzle having a plurality of discharge ports for discharging a liquid material, a liquid chamber communicating with the plurality of discharge ports via a plurality of discharge channels, A discharge member that comes into contact with the liquid material, and by applying an inertial force to the liquid material in the liquid chamber by the discharge member and simultaneously discharging from the plurality of discharge ports, a plurality of droplets can be formed on the application target
- the plurality of discharge ports are arranged on the nozzles along a straight nozzle arrangement line, and the control unit matches the nozzle arrangement line with the drawing direction of the drawing line.
- the liquid material does not come in contact before the plurality of liquid masses discharged from the discharge ports of the liquid droplets land on the object to be coated, and the liquid material landed along the nozzle arrangement line is combined on the object to be coated. It is characterized by performing linear coating by discharging In this invention which concerns on the said coating device, the said control part hold
- the discharge timing is constant based on the relative movement speed of the discharge device and the work table so that at least one of the liquid masses is bonded to the liquid material on the application object discharged immediately before to form a drawing line. It is good also as performing linear application
- the control unit adjusts the driving force of the discharge member so that the discharged plurality of liquid masses do not contact before landing on the application target, and the The liquid material may be ejected so that the liquid material landed along the nozzle arrangement line is combined on the application target.
- the plurality of discharge channels may be arranged with an inclination so that the center lines of the plurality of discharge channels intersect with the center line of the nozzle. .
- all of these discharge ports may be arrange
- the plurality of discharge ports may all have the same shape and be arranged at an equal pitch.
- the plurality of discharge ports include an even number of discharge ports, including two large discharge ports and two small discharge ports, both of which are the nozzle arrangements. Are arranged on a line, and the small discharge ports and the large discharge ports are alternately arranged along the nozzle arrangement line, or the plurality of discharge ports are an even number of discharge ports, Including two large discharge ports and two small discharge port groups, both of the large discharge ports are arranged on the nozzle arrangement line, the small discharge port group and the large discharge port
- the nozzles may be alternately arranged along the nozzle arrangement line, and the small discharge port group may include a plurality of small discharge ports arranged symmetrically with respect to the nozzle arrangement line.
- the said discharge apparatus or the said work table is provided with a rotation mechanism
- the said control part makes the said nozzle arrangement line correspond with the drawing direction of the said drawing line by the said rotation mechanism. It is good.
- the said drive device contains the uniaxial drive mechanism which can move the said discharge device and the said work table relatively linearly, and the said nozzle arrangement line is the same as the drive direction of the said uniaxial drive mechanism. It is good also as a feature to arrange.
- the said nozzle is detachably fixed with respect to the said discharge device
- the said discharge device is the said nozzle arrangement line so that the direction of the said nozzle arrangement line may become fixed with respect to the said discharge device. It may be characterized by having a positioning mechanism capable of attaching a nozzle.
- the discharge device has a smaller diameter than the liquid chamber, and a plunger whose tip moves forward and backward in the liquid chamber, a plunger reciprocating device that moves the plunger forward and backward, and A liquid feeding device that supplies a liquid material to the liquid chamber, and the liquid material is obtained by moving the plunger forward and stop moving in a state where the side surface of the tip of the plunger and the inner wall of the liquid chamber are not in contact with each other It is good also as giving an inertial force to and discharging simultaneously from these discharge ports.
- the present invention it is possible to increase the speed of drawing application.
- by performing linear application with the discharge timing set at a constant interval Tc it is possible to improve the discharge amount accuracy and the discharge position accuracy.
- the present invention having a configuration in which the discharge flow path has an inclination, it is possible to adjust the distance between the simultaneously discharged droplets by adjusting the distance between the discharge port and the application target. .
- FIG. 1st embodiment It is a perspective view which shows the coating device of the example of 1st embodiment. It is principal part side surface sectional drawing of the discharge apparatus of 1st embodiment. It is the (a) bottom view and (b) side sectional view of the nozzle member of the first embodiment. It is a figure which shows the discharge process of 1 time in 1st embodiment, (a) shows the time before the discharged droplet landed on a coating target object, (b) applied the discharged droplet. (C) shows the time when a very short time has elapsed after landing, (d) shows the time when a very short time has elapsed from the time of (c), (e) Indicates the time when a very short time has elapsed from the time of (d).
- (C) shows the time when the simultaneously ejected liquid mass has landed on the object to be coated. It is the (a) bottom view and (b) side surface sectional view of the nozzle member of the example of a second embodiment. It is a bottom view of the nozzle member of the third embodiment. It is an image figure which looked at a mode that four droplets discharged simultaneously in the example of a 3rd embodiment combined. It is a bottom view of the nozzle member of the fourth embodiment. It is the image figure which looked at a mode that the six droplets discharged simultaneously in the fourth embodiment example couple
- the coating apparatus 200 includes a discharge device 1, a mount 201, a work table 202 on which a coating target 207 is placed, and the discharge device and the work table in the X direction.
- X drive device 203 for relative movement
- Y drive device 204 for relative movement of the discharge device and work table in the Y direction
- Z drive device 205 for relative movement of the discharge device and work table in the Z direction
- discharge device 1 And a control device 206 for controlling the operation of the XYZ driving devices (203, 204, 205).
- the X direction means one direction on the plane
- the Y direction means a direction orthogonal to the X direction on the plane
- the Z direction means a direction orthogonal to the plane.
- the X drive device and the Y drive device are moved in the horizontal direction
- the Z drive device is moved in the vertical direction.
- other movement directions may be used. It is.
- not all of the X drive device, the Y drive device, and the Z drive device are required.
- the coating pattern is composed of only a straight line in one direction
- the main body of the discharge device 1 includes a main body upper portion 2 and a main body lower portion 3.
- the main body upper part 2 has a through hole 21 and a piston chamber (22, 23) penetrating the center, and the plunger 10 is inserted into the through hole 21 and the piston chamber.
- the plunger 10 is an elongated cylindrical bar and penetrates the piston 11.
- the piston 11 is a disk-shaped member in which an annular seal member 12 is provided on the side peripheral surface.
- the piston 11 hermetically divides the cylindrical piston chamber into a lower chamber 22 and an upper chamber 23, and moves up and down while sliding in the piston chamber.
- the piston 11 is connected to the plunger 10, and the plunger 10 moves up and down as the piston 11 moves up and down.
- advance movement the case where the plunger 10 moves upward
- backward movement the case where the plunger 10 moves upward
- the piston 11 is urged downward by an elastic member 13 disposed in the upper chamber 23.
- a lower vent 24 that communicates with the electromagnetic switching valve 16 is provided on the side surface of the lower chamber 22, and an annular seal member 26 through which the plunger 10 is inserted is provided on the bottom surface of the lower chamber 22.
- the electromagnetic switching valve 16 has a first position where the lower vent 24 communicates with the air supply source 19 and a second position where the lower vent 24 communicates with outside air. When the electromagnetic switching valve 16 is in the first position, the pressurized air supplied from the air supply source 19 is supplied to the lower vent 24 via the regulator 18, and the plunger tip surface 103 moves away from the bottom 412 of the liquid chamber. .
- the advance movement of the plunger 10 may be stopped immediately before the plunger tip surface 103 is seated on the bottom surface 412 of the liquid chamber so that the liquid material in the liquid chamber is ejected with a driving force.
- a driving force for example, the applicant discloses in WO2008 / 108097 and JP2013-081884A.
- the configuration in which the plunger 10 is used as a discharge member that applies an inertial force to the liquid material in the liquid chamber is illustrated, but the discharge member is not limited to this.
- the discharge member of the present invention includes, for example, a movable valve body, an actuator of an electrostatic type, a piezoelectric type, a diaphragm and a forced deformation means (for example, a combination of a hammer, a solenoid, etc. and a rod in a liquid chamber communicating with the discharge port. , A high-pressure fluid), a bubble generating heater, and the like.
- the tip 101 located below the plunger 10 repeats forward and backward movement in the liquid chamber, so that the liquid material is continuously discharged. While the plunger 10 moves forward and backward, the side surface 102 at the tip of the plunger does not contact the inner wall 411 of the liquid chamber (see FIG. 3B).
- the plunger tip surface 103 is formed in a hemispherical shape, but the shape of the plunger tip surface 103 is not limited to this.
- the plunger tip surface 103 is a flat surface or a flat surface with projections concentric with the same number Also good.
- the retracted position of the plunger 10 is defined by the stopper 14. The position of the stopper 14 can be adjusted by rotating the micrometer 15.
- the lower body 3 is joined to the lower end of the upper body 2.
- the lower part 3 of the main body has a through hole 31 penetrating the center, and the plunger 10 is inserted into the through hole 31.
- the through hole 31 communicates with the liquid chamber 41
- the annular seal member 32 is provided at the lower end of the through hole 31, so that the liquid material in the liquid chamber does not flow back into the through hole 31.
- the liquid chamber 41 is a columnar space extending up and down, and communicates with a supply path 33 through which liquid material is supplied in an upper portion.
- the supply path 33 communicates with the liquid feed path 61 of the liquid feed member 6 via the liquid feed path 42 provided in the mounting member 4.
- the supply path 33, the liquid feed path 42, and the liquid feed path 61 are configured horizontally, but it is naturally possible to configure them with an angle.
- the nozzle member 5 has a first discharge port 51 and a second discharge port 52 that are circular and have the same diameter and are provided on a nozzle arrangement line 20 that is a straight line.
- the diameter D 1 of the first discharge port 51 and the second discharge port 52 is, for example, several ⁇ m to several mm, and preferably several tens ⁇ m to several hundred ⁇ m.
- the shape of the first discharge port 51 and the second discharge port 52 is not limited to the illustrated circular shape, and for example, it is disclosed that the shape is an ellipse extending along the nozzle arrangement line 20. It is preferable that the shape or arrangement pattern of the plurality of discharge ports is configured to be symmetrical with respect to the nozzle arrangement line 20. This is also applied to the case where the lower end of the nozzle member 5 is not a flat surface but has an uneven shape.
- a first discharge port 51 (the left end of the distance right and the second discharge port 52 of the first discharge port 51) L 1 closest distance of the second discharge port 52, any case is also set larger than the diameter D 1, for example, it is set to 2 to 10 times D 1. In other words, this is a distance at which the plurality of ejection openings are arranged on the nozzle member along a straight nozzle arrangement line, and the liquid material that has landed on the application target is combined to form an application line.
- the nozzle arrangement line 20 is arranged so as to coincide with the drawing direction of the drawing line.
- the work table 202 or the discharge device 1 may be provided with a rotation mechanism that rotates in the ⁇ direction (the rotation direction about the perpendicular to the work table) so that the nozzle arrangement line 20 can dynamically match the drawing direction of the drawing line.
- the significance of matching the nozzle arrangement line 20 with the drawing direction of the drawing line is, in other words, when the nozzle arrangement line is projected on the drawing line, or the direction of the drawing line and the nozzle arrangement line is matched, or When the nozzle arrangement line 20 and the drawing line are orthogonally projected on a plane perpendicular to the discharge direction of the liquid material, the nozzle arrangement line 20 and the drawing line coincide with each other.
- the discharge direction of the liquid material in the present embodiment example more accurately means the discharge direction of the liquid material when the relative movement between the work table and the discharge device is stopped and discharged.
- the line perpendicular to the discharge direction of the liquid material is a line on the horizontal plane.
- the application pattern is composed of a plurality of straight lines having bending points, it is essential to provide the work table 202 or the Z-axis drive device 205 with a rotation mechanism that rotates in the ⁇ direction.
- the application pattern is a rectangle and one vertex of the rectangle is an application start point and an application end point, there are three folding points.
- the rotation mechanism can be configured using, for example, a known servo motor.
- the application pattern has a straight line portion
- the object to be applied is arranged on the work table 202 so that the direction of the straight line portion coincides with the X direction or the Y direction, and the nozzle arrangement line 20 is the straight line portion. Arrange them in the same direction. Accordingly, it is possible to drive only one of the X driving device 203 and the Y driving device 204 during application of the linear portion, and it is possible to apply and form a coating line with higher accuracy.
- the XYZ driving device (203, 204, 205) includes a uniaxial driving device (X driving device or Y driving device) capable of relatively linearly moving the ejection device 1 and the work table 202
- X driving device or Y driving device a uniaxial driving device
- the nozzle arrangement line 20 so as to coincide with the driving direction (X direction or Y direction) of the uniaxial driving device. Such an arrangement is particularly effective when the rotation mechanism is not provided.
- the first discharge port 51 communicates with the liquid chamber 41 via a small-diameter first discharge channel 54 and a large-diameter discharge channel 57.
- the second discharge port 52 communicates with the liquid chamber 41 via the small-diameter second discharge channel 55 and the large-diameter discharge channel 57.
- the first discharge flow channel 54 and the second discharge flow channel 55 have the same shape, and both have a central axis in the vertical direction.
- the first discharge channel 54 and the second discharge channel 55 may be configured to directly communicate with the liquid chamber 41 without providing the large-diameter discharge channel 57.
- first discharge channel 54 and the second discharge channel 55 that communicate directly with the liquid chamber 41 may be configured by two independent small-diameter channels and large-diameter channels.
- the first discharge port 51 and the second discharge port 52 provided on the lower end surface of the nozzle member 5 which is a flat surface open downward, and the lower end surface of the nozzle member 5 is horizontal (perpendicular to the discharge direction of the liquid material). The liquid material is dropped from these discharge ports in a state of being arranged in the direction of
- the nozzle member 5 has a collar portion 58 at the upper end, and is supported by the mounting member 4 with the collar portion 58.
- the mounting member 4 is detachably fixed to the lower body 3 while being supported by the nozzle member 5 or by a fixing tool such as a screw. Since the nozzle member 5 is detachably attached by the attachment member 4, it is easy to replace a plurality of nozzle members 5 having different discharge port diameters and closest distances depending on the application.
- the mode for attaching and detaching the nozzle member 5 is not limited, it is preferable to provide a positioning mechanism that can be attached so that the direction and position of the nozzle arrangement line 20 are fixed with respect to the ejection device 1.
- the positioning mechanism a known positioning mechanism can be used.
- a part of the member on the nozzle member 5 or the lower body 3 side (for example, a pin, a convex portion, a notch) is fitted to the other member for positioning. And a configuration in which positioning is performed using a separately prepared member (for example, a pin or a screw).
- a liquid feeding member 6 is fixed on the side surface of the mounting member 4.
- a liquid storage container 7 is connected to the upper surface of the liquid feeding member 6.
- the liquid storage container 7 receives supply of pressurized air from an air supply source 9 via an air dispenser 8.
- the pressurized air supplied from the air supply source 9 may be a gas other than the atmosphere (for example, nitrogen gas).
- the XYZ driving device (203, 204, 205) is configured with, for example, a known XYZ-axis servo motor and a ball screw, and the discharge port (51, 52) of the discharge device 1 is set at an arbitrary position on the workpiece. It is possible to move at a speed.
- the operation of the XYZ driving device (203, 204, 205) is controlled by the control device 206.
- the control device 206 includes a processing device, a storage device that stores a coating program, and an input device.
- a personal computer or a programmable controller can be used.
- the control device 206 may be wholly incorporated in the gantry 201 or may be partly installed outside the gantry 201 and connected by wire or wirelessly.
- the control device 206 receives application control data including an application pattern, an application reference position, a relative movement speed, a discharge timing, and a plunger advance / retreat speed from the input device, and stores them in a storage device.
- the processing device reads the application control data stored in the storage device, and executes the application operation described below.
- the coating operation by the coating apparatus 200 performs linear coating (drawing coating) in the X direction, the Y direction, or the oblique direction (the direction that forms an angle with the X direction or the Y direction), and is performed as follows.
- FIG. 4A shows a point in time before droplets (151, 152) are discharged from the discharge ports (51, 52) of the nozzle member 5 and land on the application target (workpiece). As shown in the figure, in the present invention, it is assumed that the discharged liquid material is in a droplet state on the workpiece.
- the liquid material discharged from the discharge ports (51, 52) may form droplets after being separated from the discharge ports, or may be separated from the discharge ports after contacting the workpiece, Drops may be formed.
- the liquid material before being discharged from the discharge port and divided from the discharge port and the liquid material that has been divided after being discharged from the discharge port and before landing on the workpiece are referred to as a “liquid mass”. There is a case.
- the applicant discloses in WO2008 / 146464 a coating method in which a liquid material is separated from a discharge port after contacting a work and forms droplets on a coating target.
- the height of the liquid material in a state connected to the discharge port (nozzle) before contact with the workpiece is compared with the height h 0 of the liquid material. It is preferred to perform the discharge operation distance h 1 in less than several times, more to set the distance h 1 between the discharge orifice and the work to less than twice the h 0 (h 0 ⁇ h 1 ⁇ h 0 ⁇ 2) preferable.
- the conditions for this change depend on the work environment such as the type of liquid material and the configuration of the discharge device, it is necessary to find out from the work of repeating discharge while changing the conditions of each element for each work environment.
- the main factors to be considered are the distance between the discharge ports, the size of the holes of the discharge ports, the viscosity of the liquid material, the size of the propulsion force of the discharge member (other than these) Naturally it is also possible to adjust the elements.)
- FIG. 4B shows a time point when the simultaneously ejected liquid mass has landed on the application target.
- the liquid materials discharged from the two discharge ports (51, 52) are in a non-contact positional relationship with each other at the time of landing.
- the liquid material discharged from the plurality of discharge ports forms the same number of liquid droplets as the discharge ports and land on the application object without contact with each other.
- FIG. 4C shows a point in time when a very short time has elapsed after the simultaneously ejected liquid mass has landed on the object to be coated.
- the droplet landed in a circular shape diffuses on the object to be coated, and the two circles come into contact with each other to start the coupling.
- FIG. 4D shows a time when a very short time has elapsed from the time of FIG.
- the coupling between the two contacted circles further progresses, and the dent in the width direction (vertical direction in the figure) becomes shallow. That is, the combination of two droplets on the object to be coated acts to form an elongated shape extending in the direction of the nozzle arrangement line 20 unlike the combination of two droplets during flight (two droplets are Even if they are combined, they do not become circular in top view.)
- FIG. 4E shows a point in time when a very short time has elapsed from the point in FIG.
- 4 (a) to 4 (e) show a process of performing linear coating of a predetermined length (minimum unit) by one discharge, and by repeating this process, a coating line having a desired length is shown. Can be formed.
- FIGS. 5A to 5E show a process of performing linear coating by a plurality of ejections.
- Fig.5 (a) is the figure which looked at the time immediately after 1st discharge
- FIG.5 (b) is the figure which looked at the time immediately after the 2nd launch from the side and the upper part. At this point, the two droplets related to the first firing have started to combine on the application target.
- FIG.5 (c) is the figure which looked at the time immediately after the 3rd launch from the side and the upper part. At this point, the combination of the two droplets related to the first firing has further progressed, and the two droplets related to the second firing have started to combine on the object to be coated.
- FIG.5 (d) is the figure which looked at the time immediately after 4th discharge
- the two droplets associated with the first launch are fully combined, the combination of the two droplets associated with the second launch is further advanced, and the two droplets associated with the third launch are Joining has started.
- FIG.5 (e) is the figure which looked at the time immediately after 5th discharge
- the droplets related to the first launch and the second launch are completely combined, the combination of the two droplets related to the third launch is further advanced, and the two droplets related to the fourth launch are The bond is starting above.
- the application line here is not only a linear application line as shown in FIG. 4 (e) having no unevenness in the width direction (longitudinal side edge) of the applied liquid material,
- corrugation in the width direction disclosed by FIG.4 (d) is also contained.
- unevenness may remain in the width direction of the coating line, but for example, there is unevenness in the width direction as in the case of application of an adhesive that is crushed during bonding. There are cases where the purpose can be achieved even with a coating line.
- the application line is not a film formed uniformly on the surface of the object to be applied (work), but a line formed so as to protrude on the surface.
- the present invention uses a nozzle having a plurality of discharge ports, while the discharge device and the work table is relatively moved at a constant velocity V c, as can be performed linear applying the timing of ejection as constant interval T c It can be said that there is a special effect.
- the present invention it is possible to perform linear coating while causing the plunger rod to repeat a certain reciprocating motion while relatively moving the discharge device and the work table at a certain speed.
- the interval Tc is such that at least one of the plurality of liquid masses simultaneously ejected from the plurality of ejection openings is coupled to the liquid material (landing liquid) on the application object that has been ejected immediately before the linear application. It is preferable to set the interval so as to form a pattern.
- the connection with the liquid material discharged immediately before may be performed at the same time as landing or may be performed after a short time after landing. The former often occurs when the liquid material discharged immediately before is already diffused on the application target.
- an interval may be set such that V c ⁇ T c is a distance between adjacent discharge ports.
- the object to be applied is a line B formed by combining a plurality of ejected liquid masses and a line A formed by combining a plurality of liquid masses ejected immediately before.
- the above combined state can be made the same as the combined state of a plurality of liquid masses constituting the line part A and the combined state of a plurality of liquid masses constituting the line part B, thereby forming a uniform straight line. Because it can be expected.
- FIG. 13 is an explanatory diagram of a coating method in the case where two droplets that have landed on a coating target do not combine on the coating target.
- a straight line indicates the position of the discharge port 51 in each discharge. Since the two droplets ejected by the first ejection (shown by solid lines and shaded areas) do not combine, the second ejection causes the two droplets ejected the first time to communicate with each other. It is necessary to discharge two droplets (illustrated by dotted lines and shaded areas).
- two droplets (solid line) are overlapped so as to overlap with the droplets on the traveling direction side (right side) discharged the second time so that the overlapping state of the discharged droplets is the same in all places.
- two liquid masses are ejected at the same time to perform linear coating, so compared with the case where linear coating is performed by overlapping one liquid mass.
- the coating speed can be increased by about twice. This speeding up of the linear application is particularly advantageous when a straight line is applied. For example, when the application pattern is composed of only one or a plurality of straight lines, a remarkable speed-up effect is achieved.
- the second embodiment is different from the first embodiment in that the nozzle members 5 of the discharge device 1 have three discharge ports arranged at equal pitches, and the other configurations are the same as the first embodiment. is there. In the following, the description of the configuration common to the first embodiment will be omitted, and the description of the different configuration will be given.
- the nozzle member 5 has a first discharge port 51, a second discharge port 52, and a third discharge port 53 that are circular and have the same diameter provided on the nozzle arrangement line 20 that is a straight line. is doing.
- the diameter D 1 of the first to third discharge ports (51-53) are the same as in the first embodiment.
- a second discharge port 52 of the third discharge port 53 closest distance are the same length.
- L 1 and L 2 are set to be larger than the diameter D 1 in any case, for example, 2 to 10 times as large as D 1 .
- the nozzle arrangement line 20 is arranged so as to coincide with the direction of a desired drawing line (straight line).
- the work table 202 or the discharge device 1 may be provided with a rotation mechanism, and the direction of the discharge port may be dynamically adjusted by the rotation mechanism.
- the first to third discharge ports (51 to 53) include the first discharge channel 54, the second discharge channel 55, the third discharge channel 56, and the large-diameter discharge channel.
- the fluid chamber 41 communicates with the liquid chamber 41 through 57.
- the first to third discharge flow paths (54 to 56) have the same shape, and all have the central axis in the vertical direction. That is, the first to third discharge channels (54 to 56) are provided in parallel to the vertical direction.
- the nozzle member having three discharge ports arranged at equal pitches has been disclosed, but the same effect can be obtained by using a nozzle member having four or more discharge ports having the same shape arranged at equal pitches. .
- the third embodiment is different from the first and second embodiments in that the nozzle members 5 of the discharge device 1 have four discharge ports arranged at equal pitches, and the other configurations are the first and second. This is the same as the embodiment. In the following, description of configurations common to the first and second embodiments will be omitted, and different configurations will be described.
- the nozzle member 5 includes a large circular first discharge port 71 and a second discharge port 72 provided on a straight nozzle arrangement line 20, a small circular third discharge port 73 and a fourth discharge port.
- a discharge port 74 is provided.
- the diameter D 1 of the first discharge port 71 and second discharge port 72 is, for example, several tens of [mu] m ⁇ Number mm.
- the diameter D 2 of the third discharge port 73 and fourth discharge port 74 is 1 / 2-1 / 10 of the diameter D 1, for example, several [mu] m ⁇ several hundred [mu] m.
- the large circular discharge ports and the small circular discharge ports are alternately arranged on the nozzle arrangement line 20 at substantially equal intervals.
- the third discharge port 73 is disposed (the left end of the distance right and second discharge port 72 of the first discharge port 71) halfway between L 1 closest distance between the first discharge port 71 and the second discharge port 72.
- a first discharge port 71 closest distance L 2 of the third discharge port 73 any case is set larger than the diameter D 1, for example, it is set to 2 to 10 times D 1.
- the fourth discharge port 74 is provided symmetrically with the third discharge port 73 with respect to the second discharge port 72. That is, the second discharge port 72 closest distance L 3 of the fourth discharge port 74 is the same as L 2.
- the nozzle arrangement line 20 is arranged so as to coincide with the direction of a desired drawing line (straight line).
- the work table 202 or the discharge device 1 may be provided with a rotation mechanism, and the direction of the discharge port may be dynamically adjusted by the rotation mechanism.
- FIG. 9 is an image diagram showing how four liquid masses discharged simultaneously from the first to fourth discharge ports (71 to 74) land and diffuse on the application target.
- the four droplets (171 to 174) ejected simultaneously from the first to fourth ejection ports (71 to 74) are circular droplets that are independent from each other at the time of landing, as shown in the upper part of FIG. .
- the four liquid droplets (171 to 174) diffuse and start to combine.
- the two auxiliary droplets 173 to 174 act to promote the coupling of the basic droplets 171 to 172.
- each discharge port is circular, the effect of this invention is show
- the discharge port is composed of a plurality of holes, it is preferable that at least the largest discharge port is configured to have the same shape and the same size, and more preferably, the discharge ports of the plurality of holes are the same. It is constituted by a combination of discharge port groups having the same size and shape (see FIGS. 8 and 10).
- the two auxiliary droplets 173 to 174 act to promote the coupling of the basic droplets 171 to 172.
- the fourth embodiment is different from the first to third embodiments in that the nozzle member 5 of the discharge device 1 has six discharge ports, and the other configurations are the same as those of the first to third embodiments. is there. In the following, the description of the configuration common to the first to third embodiments will be omitted, and the description of the different configuration will be given.
- the nozzle member 5 is arranged along the nozzle arrangement line with the first and second outlets 81 and 82 having the same diameter and a large circle provided on the nozzle arrangement line 20 which is a straight line.
- a third discharge port 83, a fourth discharge port 84, a fifth discharge port 85, and a sixth discharge port 86 having the same diameter and small circle are provided.
- the third discharge port 83 and the fourth discharge port 84 are arranged symmetrically across the nozzle arrangement line 20, and the fifth discharge port 85 and the sixth discharge port 86 are arranged symmetrically across the nozzle arrangement line 20.
- the first to sixth discharge ports (81 to 86) are arranged symmetrically with respect to the nozzle arrangement line 20.
- the plurality of discharge ports include a plurality of large circular discharge ports and a plurality of small circular discharge port groups, and all of the large circular discharge ports are disposed on the nozzle arrangement line 20 and are small.
- the circular discharge port groups and the large circular discharge ports are alternately arranged, and the small circular discharge port group includes a plurality of small circular discharge ports arranged symmetrically with the nozzle arrangement line 20 in between.
- the diameter D 1 of the first discharge port 81 and second discharge port 82 is, for example, several tens of [mu] m ⁇ Number mm.
- the third discharge port 83, a fourth discharge port 84, the diameter D 2 of the fifth discharge port 85 and sixth ejection port 86 is 1 / 2-1 / 10 of the diameter D 1, for example, several [mu] m ⁇ several hundred ⁇ m.
- a third discharge port 83 and a fourth discharge port 84 are arranged.
- the closest distance L 3 of the straight line and the second discharge port 72 perpendicular to the nozzle arrangement lines 20 fifth discharge port 85 and the sixth discharge port 86 is disposed is the same as L 2.
- the work table 202 or the discharge device 1 may be provided with a rotation mechanism, and the direction of the discharge port may be dynamically adjusted by the rotation mechanism.
- each discharge port has a drawing line on a plane including the discharge direction of the liquid material discharged from the large discharge port.
- the nozzle arrangement line 20 may be made to coincide with the drawing direction of the drawing line.
- FIG. 11 is an image diagram showing how the six liquid masses discharged simultaneously from the first to sixth discharge ports (81 to 86) land and diffuse on the application target.
- the six droplets (181 to 186) discharged simultaneously from the first to sixth discharge ports (81 to 86) are circular droplets that are independent of each other when viewed from above, as shown in the upper part of FIG. . As shown in the middle part of FIG. 11, when a very short time elapses after landing, the six droplets (181 to 186) diffuse and start to combine.
- each discharge port is preferably circular, but is not limited to a circle.
- the fifth embodiment is different from the first to fourth embodiments in the configuration of the nozzle member 5 of the discharge device 1, and the other configurations are the same as those in the first to fourth embodiments.
- the description of the configuration common to the first to fourth embodiments will be omitted, and the description of the different configuration will be given.
- the nozzle member 5 of the fifth embodiment is composed of an upper member indicated by reference numeral 5a and a lower member indicated by reference numeral 5b.
- a collar portion 58 is provided at the upper end, and the collar portion is supported by the mounting member 4.
- the lower member 5b is screwed into the lower end of the upper member 5a or is detachably fixed by a fixing tool such as a screw. Since the lower member 5b is detachably attached to the upper member 5a, it is easy to replace a plurality of lower members 5b having different diameters and distances of the discharge ports or different ejection angles of the discharge ports depending on the application.
- a positioning mechanism for making the direction of the lower member 5b constant with respect to the upper member 5a.
- a known positioning mechanism can be used as the positioning mechanism.
- the lower member 5b or a part of the upper member 5a for example, a pin, a convex portion, a notch
- the structure which positions using the member for example, pin and screw) prepared separately is mentioned.
- the first discharge port 91 communicates with the liquid chamber 41 via the linear first discharge flow path 93 and the large diameter discharge flow path 95. Further, the second discharge port 92 communicates with the liquid chamber 41 via a linear second discharge channel 94 and a large-diameter discharge channel 95.
- 12 (b) is an image diagram of the distance of the droplets when the distance between the discharge port and the work are h a a a case and h b (overlapping degree).
- the distance between the droplets increases as the distance h between the discharge port and the workpiece decreases, and the distance between the droplets decreases as the distance h increases.
- it is important to set the distance h so that a plurality of droplets ejected simultaneously do not contact or combine before landing.
- the coating apparatus and the coating method of the fifth embodiment described above it is possible to adjust the distance between two landed droplets or the degree of overlap by adjusting the distance h between the discharge port and the workpiece. It is. Accordingly, it is possible to appropriately cope with a difference in droplet distance or overlapping due to a difference in atmospheric environment such as humidity or room temperature.
- the number of discharge ports is not limited to the two illustrated, and may be three or more. When the number of discharge ports is an odd number, the discharge ports located at the center are not inclined, and the pair of discharge ports located at the same distance from the center are inclined at an equal angle with respect to the central axis of the nozzle member.
- the ejection angle of each discharge port is set in a direction (radial) away from the central axis of the nozzle member, and droplets are formed on the workpiece. It is also possible to combine them.
- the present invention can be applied to industrial grease, solder paste, silver paste, various adhesives (UV curable type, epoxy type, hot melt type, etc.), cream solder, as well as a solvent (about 0.8 cps). It is possible to apply liquid materials ranging from low viscosity materials to high viscosity materials (about 1,000,000 cps).
- Discharging device 2 Main body upper part 3: Main body lower part 4: Mounting member 5: Nozzle member 6: Liquid feeding member 7: Liquid material storage container 8: Air dispenser 9: Air supply source 10: Plunger, 11: Piston, 12: Seal member, 13: Elastic member, 14: Stopper, 15: Micrometer, 16: Electromagnetic switching valve, 17: Switching valve controller, 18: Pressure reducing valve (regulator), 19 : Air supply source, 20: Nozzle arrangement line, 21: Through hole, 22: Lower chamber, 23: Upper chamber, 24: Lower vent, 25: Upper vent, 31: Through hole, 32: Seal member, 33: Supply path, 41: liquid chamber, 42: liquid feed path, 51: first discharge port, 52: second discharge port, 53: third discharge port, 61: liquid feed channel, 71: first discharge port, 72: Second discharge port 73: Third discharge port 74: Fourth discharge port 81: First discharge port 82: second discharge port, 83: third discharge port, 84: fourth discharge port, 85: fifth
Landscapes
- Coating Apparatus (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
上記塗布方法に係る本発明では、前記制御部が、前記吐出装置と前記ワークテーブルとを一定の速度Vcを保持してノズル配置線と同じ方向に相対移動させながら、前記吐出された複数の液塊の少なくとも一つが、直前に吐出された塗布対象物上の液体材料に結合して描画線を形成するように、前記吐出装置と前記ワークテーブルとの相対移動速度に基づき吐出のタイミングを一定の間隔Tcとして線状塗布を行うことを特徴としてもよい。
上記塗布方法に係る本発明では、前記吐出部材の推進力を調節することにより、前記吐出された複数の液塊が塗布対象物に着弾する前に接触せず、且つ、前記ノズル配置線に沿って着弾した液体材料が塗布対象物上で結合するように液体材料を吐出することを特徴としてもよい。
上記塗布方法に係る本発明では、前記複数の吐出流路が、前記複数の吐出流路の各中心線が前記ノズルの中心線と交わるように、傾斜をもって配置され、吐出口と塗布対象との距離hを調節することにより、液滴間の距離を調節することを特徴としてもよい。
上記塗布方法に係る本発明では、前記複数の吐出口がいずれも同一形状であり、等ピッチに配置されることを特徴としてもよい。
上記塗布方法に係る本発明では、前記複数の吐出口が偶数個の吐出口からなり、二個の大型吐出口と、二個の小型吐出口とを含み、吐出口のいずれもが前記ノズル配置線上に配置されること、並びに、前記小型吐出口と前記大型吐出口とが前記ノズル配置線に沿って交互に配置されること、或いは、前記複数の吐出口が偶数個の吐出口からなり、二個の大型吐出口と、二個の小型吐出口群とを含み、前記大型吐出口のいずれもが前記ノズル配置線上に配置されること、前記小型吐出口群と前記大型吐出口とが前記ノズル配置線に沿って交互に配置されること、並びに、前記小型吐出口群が、前記ノズル配置線に対して対称に配置された複数の小型吐出口から構成されることを特徴としてもよい。
上記塗布方法に係る本発明では、前記吐出装置または前記ワークテーブルが、回転機構を備え、前記回転機構により、前記ノズル配置線を前記描画線の描画方向と一致させることを特徴としてもよく、ここで好ましくは、前記線状塗布が、第一の方向に延びる直線状の塗布線と第一の方向と異なる第二の方向に延びる直線状の塗布線とを含む塗布パターンに従い行われることを特徴とする。
上記塗布方法に係る本発明では、前記ノズルが、前記吐出装置に対し着脱自在に固定されており、前記吐出装置が、前記ノズル配置線の方向が前記吐出装置に対して一定になるように前記ノズルを取り付け可能とする位置決め機構を有することを特徴としてもよい。
上記塗布装置に係る本発明では、前記制御部が、前記吐出装置と前記ワークテーブルとを一定の速度Vcを保持してノズル配置線と同じ方向に相対移動させながら、前記吐出された複数の液塊の少なくとも一つが、直前に吐出された塗布対象物上の液体材料に結合して描画線を形成するように、前記吐出装置と前記ワークテーブルとの相対移動速度に基づき吐出のタイミングを一定の間隔Tcとして線状塗布を行うことを特徴としてもよい。
上記塗布装置に係る本発明では、前記複数の吐出流路が、前記複数の吐出流路の各中心線が前記ノズルの中心線と交わるように、傾斜をもって配置されていることを特徴としてもよい。
上記塗布装置に係る本発明では、前記複数の吐出口のいずれもが、前記ノズル配置線上に配置されることを特徴としてもよい。
上記塗布装置に係る本発明では、前記複数の吐出口がいずれも同一形状であり、等ピッチに配置されることを特徴としてもよい。
上記塗布装置に係る本発明では、前記複数の吐出口が偶数個の吐出口からなり、二個の大型吐出口と、二個の小型吐出口とを含み、吐出口のいずれもが前記ノズル配置線上に配置されること、並びに、前記小型吐出口と前記大型吐出口とが前記ノズル配置線に沿って交互に配置されること、或いは、前記複数の吐出口が偶数個の吐出口からなり、二個の大型吐出口と、二個の小型吐出口群とを含み、前記大型吐出口のいずれもが前記ノズル配置線上に配置されること、前記小型吐出口群と前記大型吐出口とが前記ノズル配置線に沿って交互に配置されること、並びに、前記小型吐出口群が、前記ノズル配置線に対して対称に配置された複数の小型吐出口から構成されることを特徴としてもよい。
上記塗布装置に係る本発明では、前記吐出装置または前記ワークテーブルが、回転機構を備え、前記制御部が、前記回転機構により、前記ノズル配置線を前記描画線の描画方向と一致させることを特徴としてもよい。
上記塗布装置に係る本発明では、前記駆動装置が、前記吐出装置と前記ワークテーブルとを相対的に直線移動可能な一軸駆動機構を含み、前記ノズル配置線が前記一軸駆動機構の駆動方向と一致して配置されることを特徴としてもよい。
上記塗布装置に係る本発明では、前記ノズルが、前記吐出装置に対し着脱自在に固定されており、前記吐出装置が、前記ノズル配置線の方向が前記吐出装置に対して一定になるように前記ノズルを取り付け可能とする位置決め機構を有することを特徴としてもよい。
上記塗布装置に係る本発明では、前記吐出装置が、前記液室より小径であり、先端部が液室内を進退動するプランジャーと、前記プランジャーを進退動させるプランジャー往復移動装置と、前記液室に液体材料を供給する液送装置と、を備え、前記プランジャーの先端部の側面と前記液室の内側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体材料に慣性力を与えて前記複数の吐出口から同時に吐出することを特徴としてもよい。
また、吐出のタイミングを一定の間隔Tcとして線状塗布を行うことにより、吐出量精度および吐出位置精度を向上させることが可能となる。
さらに、吐出流路が傾斜を有する構成を備える本発明によれば、吐出口と塗布対象物との距離を調節することにより、同時に吐出された液滴間の距離を調節することが可能となる。
《第一実施形態例》
<塗布装置>
図1に示すように、第一実施形態例の塗布装置200は、吐出装置1と、架台201と、塗布対象物207を載置するワークテーブル202と、吐出装置とワークテーブルとをX方向に相対移動させるX駆動装置203と、吐出装置とワークテーブルとをY方向に相対移動させるY駆動装置204と、吐出装置とワークテーブルとをZ方向に相対移動させるZ駆動装置205と、吐出装置1およびXYZ駆動装置(203、204、205)の動作を制御する制御装置206とを備えている。
なお、X方向は平面における一の方向を、Y方向は平面におけるX方向と直交する方向を、Z方向は平面と直交する方向を意味するものとする。
本実施形態例においては、X駆動装置およびY駆動装置の移動方向が水平方向、Z駆動装置の移動方向が鉛直方向になるように構成しているが、これ以外の移動方向とすることも可能である。また、X駆動装置、Y駆動装置およびZ駆動装置の全てを必要とするわけではなく、例えば、塗布パターンが一方向の直線のみからなる場合は、一方向に移動させる駆動装置のみ(X駆動装置またはY駆動装置のみ)を配置することで、本発明の塗布を行うことが可能である。
図2に示すように、吐出装置1の本体は、本体上部2と、本体下部3とを備えて構成される。
本体上部2は中心を貫通する貫通孔21とピストン室(22、23)を有し、貫通孔21およびピストン室にはプランジャー10が挿通される。プランジャー10は細長い円柱棒であり、ピストン11を貫通している。ピストン11は側周面に環状のシール部材12が設けられた円盤状の部材である。ピストン11は、円柱状のピストン室を下方室22と上方室23とに気密に分断し、ピストン室内を摺動しながら上下動する。ピストン11はプランジャー10と連結されており、ピストン11が上下動するのに伴いプランジャー10も上下動する。以下では、プランジャー10が下方に移動する場合を進出移動といい、プランジャー10が上方に移動する場合を後退移動という場合がある。
本実施形態例では、液室内の液体材料に慣性力を与える吐出部材としてプランジャー10を用いる構成を例示したが、吐出部材はこれに限定されない。本発明の吐出部材には、例えば、吐出口と連通する液室内に、可動弁体、静電型、圧電型などのアクチュエータ、ダイヤフラムおよび強制変形手段(例えば、殴打ハンマーおよびソレノイド等とロッドの組み合わせ、高圧流体)、バブル発生用ヒーター、などの圧力を発生させる機構も含まれる。
プランジャー10の後退位置は、ストッパー14により規定される。ストッパー14の位置は、マイクロメータ15を回転することにより調節することが可能である。
吐出装置1を塗布装置200に搭載する際は、ノズル配置線20が、描画線の描画方向と一致するように配置する。ワークテーブル202または吐出装置1にθ方向(ワークテーブルの垂線を中心とした回転方向)に回転する回転機構を設け、ノズル配置線20を描画線の描画方向と動的に一致可能としてもよい。ここで、ノズル配置線20を描画線の描画方向と一致させることの意義は、言い換えれば、描画線上にノズル配置線を投写したときに、描線とノズル配置線の方向が一致すること、または、液体材料の吐出方向に対して直角の平面に、ノズル配置線20と描画線の正射影をした場合に、ノズル配置線20と描画線の方向が一致することである。さらに言い換えれば、吐出口から吐出される液体材料の吐出方向を含む平面に描画線があることである。これは、塗布対象物の表面が平面でない場合や傾いている場合にも適用可能である。
ここで、本実施形態例における液体材料の吐出方向とは、より正確には、ワークテーブルと吐出装置との相対移動を停止して吐出した場合における液体材料の吐出方向を意味する。本実施形態例のように、液体材料の吐出方向が鉛直方向と等しい場合は、上記の液体材料の吐出方向に対して直角となる線は、水平面上の線となる。
他方で、塗布パターンが、折り曲がり地点を有する複数の直線から構成される場合には、ワークテーブル202またはZ軸駆動装置205にθ方向に回転する回転機構を設けることが必須となる。例えば、塗布パターンが四角形であり、四角形の一の頂点が塗布開始点および塗布終了点となる場合、折り曲がり地点は3つとなる。回転機構は、例えば、公知のサーボモータを用いて構成することができる。
また、塗布パターンが、直線部を有する場合には、直線部の方向がX方向またはY方向に一致するように塗布対象物をワークテーブル202に配置し、かつ、ノズル配置線20が直線部と同方向となるように配置する。これにより、直線部の塗布時にX駆動装置203またはY駆動装置204のいずれか一方のみを駆動して塗布することが可能となり、より精度良く塗布線を塗布形成することが可能となる。
すなわち、XYZ駆動装置(203、204、205)が、吐出装置1とワークテーブル202とを相対的に直線移動することが可能な一軸駆動装置(X駆動装置またはY駆動装置)を含む場合は、ノズル配置線20が当該一軸駆動装置の駆動方向(X方向またはY方向)と一致するように配置することが好ましい。このような配置は、上記の回転機構を有さない場合に特に有効である。
第1吐出流路54および第2吐出流路55は、大径吐出流路57を設けず、直接液室41に連通するように構成してもよい。また、液室41に直接連通する第1吐出流路54および第2吐出流路55を、独立した各2本の細径流路および大径流路により構成してもよい。
平面であるノズル部材5の下端面に設けられた第1吐出口51および第2吐出口52は下方に開口しており、ノズル部材5の下端面が水平(液体材料の吐出方向に対して直角の方向)に配置された状態で、これらの吐出口から液体材料が滴下される。
取付部材4の側面には液送部材6が固設される。液送部材6の上面には、液体貯留容器7が連結されている。液体貯留容器7は、エア式ディスペンサ8を介してエア供給源9から加圧エアの供給を受ける。なお、エア供給源9から供給される加圧エアは、大気以外のガス(例えば、窒素ガス)である場合もある。
XYZ駆動装置(203、204、205)は、例えば、公知のXYZ軸サーボモータとボールネジとを備えて構成され、吐出装置1の吐出口(51、52)をワークの任意の位置に、任意の速度で移動させることが可能である。XYZ駆動装置(203、204、205)の動作は、制御装置206により制御される。
制御装置206は、処理装置、塗布プログラムを格納した記憶装置および入力装置を備えて構成され、例えば、パーソナルコンピュータやプログラマブルコントローラなどを用いることができる。制御装置206は、架台201に全部が内蔵される場合もあれば、一部が架台201の外部に設置され、有線または無線により接続される場合もある。制御装置206は、入力装置から塗布パターン、塗布基準位置、相対移動速度、吐出タイミング、プランジャー進退速度を含む塗布制御データを受信し、記憶装置に記憶する。処理装置は、記憶装置に記憶された塗布制御データを読み出し、次に述べる塗布動作を実行する。
塗布装置200による塗布動作は、X方向、Y方向または斜め方向(X方向またはY方向と角度を構成する方向)に線状塗布(線引き塗布)を行うものであって、次の如く行われる。
図4(a)は、ノズル部材5の吐出口(51、52)から、液滴(151、152)が吐出され、塗布対象物(ワーク)に着弾する前の時点を示している。同図に示すように、本発明では、吐出された液体材料がワーク上で液滴の状態となることが前提とされる。ここで、吐出口(51、52)から吐出された液体材料は、吐出口から分断された後に滴を形成してもよいし、ワークに接触した後に吐出口と分断され、塗布対象物上で滴を形成するのでもよい。本明細書では、吐出口から吐出され、吐出口から分断される前の液体材料と、吐出口から吐出された後に分断され、ワークに着弾する前の液滴を合わせて「液塊」と呼称する場合がある。
図4(c)は、同時吐出された液塊が塗布対象物に着弾後、ごく短い時間が経過した時点を示している。同図に示すように、円形に着弾した液滴は塗布対象物上で拡散し、二つの円が接触し結合を開始する。
図4(e)は、図4(d)の時点から、ごく短い時間が経過した時点を示している。同図に示すように、二つの円が完全に結合して塗布幅の不均一がなくなり、ノズル配置線20と同一方向に延びる直線状の細長い塗布パターンが形成される。
図4(a)~(e)は、一回の吐出により所定の長さ(最小単位)の線状塗布を行う工程を示すものであり、この工程を繰り返すことにより所望の長さの塗布線を形成することが可能となる。
図5(a)は、第一発射直後の時点を側方から視た図である。
図5(b)は、第二発射直後の時点を側方および上方から視た図である。この時点では、第一発射に係る二つの液滴は塗布対象物上で結合を開始している。
図5(c)は、第三発射直後の時点を側方および上方から視た図である。この時点では、第一発射に係る二つの液滴の結合は更に進展し、第二発射に係る二つの液滴は塗布対象物上で結合を開始している。
図5(d)は、第四発射直後の時点を側方および上方から視た図である。この時点では、第一発射に係る二つの液滴は完全に結合し、第二発射に係る二つの液滴の結合は更に進展し、第三発射に係る二つの液滴は塗布対象物上で結合を開始している。
図5(e)は、第五発射直後の時点を側方および上方から視た図である。この時点では、第一発射および第二発射に係る液滴は完全に結合し、第三発射に係る二つの液滴の結合は更に進展し、第四発射に係る二つの液滴は塗布対象物上で結合を開始している。
なお、塗布線は塗布対象物(ワーク)の表面に一様に形成された膜ではなく、表面に隆起するように形成された線である。
好ましい間隔Tcの一例として、Vc×Tcが、隣り合う吐出口間の距離となるような間隔とすることが挙げられる。このような間隔に設定した場合、吐出された複数の液塊が結合してできた線部Bとその直前に吐出された複数の液塊が結合してできた線部Aとの塗布対象物上での結合状態を、線部Aを構成する複数の液塊の結合状態および線部Bを構成する複数の液塊の結合状態と同一とすることができ、もって均一な直線を形成する効果が期待できるからである。
1回目の吐出で吐出された二つの液滴(実線および網掛けで図示)が結合しないため、2回目の吐出では、1回目に吐出された二つの液滴の間が連絡されるように二つの液滴(点線および網掛けで図示)の吐出を行うことが必要となる。3回目の吐出では、吐出された液滴の重なり具合が全ての場所で同じになるように、2回目に吐出された進行方向側(右側)の液滴と重なるように二つの液滴(実線および斜線で図示)の吐出を行うことが必要となる。4回目の吐出では、2回目の吐出と同様、3回目に吐出された二つの液滴の間が連絡されるように二つの液滴(点線および斜線で図示)の吐出を行うことが必要となる。
このように、図13の塗布方法では、吐出装置とワークテーブルとを一定の速度で相対移動させた場合、吐出のタイミングを変えなくてはならないという課題が生じる。他方で、吐出装置とワークテーブルとの相対移動の速度を変えると、液滴の着弾位置の制御が難しくなるという課題が生じる。
また、複数の吐出口を有するノズルを用い、吐出装置とワークテーブルとを一定の速度で相対移動させながら、吐出のタイミングを一定の間隔として高精度な線状塗布を行うことが可能となる。
第二実施形態例は、吐出装置1のノズル部材5が等ピッチで配置された三つの吐出口を有する点で第一実施形態例と相違し、その他の構成は第一実施形態例と同様である。以下では第一実施形態例と共通する構成については説明を割愛し、異なる構成について説明を行うものとする。
第二実施形態例によれば、一度の吐出で3滴分の長さの塗布線を形成することが可能となる。また、本実施形態では等ピッチで配置された三つの吐出口を有するノズル部材を開示したが、四つ以上の同一形状の吐出口を等ピッチで配置したノズル部材でも同様の効果が奏される。
第三実施形態例は、吐出装置1のノズル部材5が等ピッチで配置された四つの吐出口を有する点で第一および第二実施形態例と相違し、その他の構成は第一および第二実施形態例と同様である。以下では第一および第二実施形態例と共通する構成については説明を割愛し、異なる構成について説明を行うものとする。
なお、各吐出口は円形とすることが好ましいが、本発明の効果は円形以外の形状でも奏される。また、吐出口が複数の大きさの孔から構成される場合、少なくとも最も大きな吐出口は同一形状で同じ大きさに構成することが好ましく、より好ましくは複数の大きさの孔の吐出口を同一形状で同じ大きさの吐出口群の組み合わせ(図8,10参照)により構成する。
以上のように、二つの補助液滴173~174は、基本液滴171~172の結合を促進させるように作用する。
第四実施形態例は、吐出装置1のノズル部材5が六つの吐出口を有する点で第一ないし第三実施形態例と相違し、その他の構成は第一ないし第三実施形態例と同様である。以下では第一ないし第三実施形態例と共通する構成については説明を割愛し、異なる構成について説明を行うものとする。
第1吐出口81と第2吐出口82の最近接距離(第1吐出口81の右端と第2吐出口82の左端の距離)L1の中間地点でノズル配置線20と直交する直線上に第3吐出口83および第4吐出口84が配置される。L1の中間地点でノズル配置線20と直交する直線と第1吐出口81および第2吐出口82の最近接距離L2(=L1×1/2)は、如何なる場合も直径D1よりも大きく設定され、例えば、D1の2~10倍に設定される。
第5吐出口85および第6吐出口86が配置されるノズル配置線20と直交する直線と第2吐出口72の最近接距離L3は、L2と同一である。吐出装置1を塗布装置200に搭載する際は、ノズル配置線20が所望の描画線(直線)の方向と一致するように配置する。第一実施形態と同様に、ワークテーブル202または吐出装置1に回転機構を設け、回転機構により吐出口の方向を動的に調整してもよい。
なお、本実施形態例のように大型の吐出口と小型の吐出口とを有する場合は、大型の吐出口から吐出される液体材料の吐出方向を含む平面に描画線があるように各吐出口を配置することで、ノズル配置線20を描画線の描画方向と一致させてもよい。
図11は、第1~第6吐出口(81~86)から同時に吐出された六つの液塊が、着弾して塗布対象物上で拡散する様子のイメージ図である。第1~第6吐出口(81~86)から同時に吐出された六つの液滴(181~186)は、図11上段に示すように、着弾時は相互に独立した上面視円形の滴である。図11中段に示すように、着弾後ごく短い時間が経過すると、六つの液滴(181~186)はそれぞれ拡散し、結合を開始する。最終的には、図11下段に示すように、六つの円が完全に結合して塗布幅の不均一がなくなり、ノズル配置線20と同一方向に延びる直線状の細長い塗布パターンが形成される。
以上のように、四つの補助液滴183~186は、基本液滴181~182の結合時に生じる幅方向の凹みを速やかに解消するように作用する。なお、本実施形態でも各吐出口は円形とすることが好ましいが、円形に限定されない。
第五実施形態例は、吐出装置1のノズル部材5の構成が第一ないし第四実施形態例と相違し、その他の構成は第一ないし第四実施形態例と同様である。以下では第一ないし第四実施形態例と共通する構成については説明を割愛し、異なる構成について説明を行うものとする。
本実施形態例では、液体材料の吐出方向は中心軸59の方向として観念される。
吐出口の数は例示の二個に限定されず、三個以上であってもよい。吐出口の数が奇数個の場合は、中心に位置する吐出口には傾斜を設けず、中心から同じ距離に位置する対となる吐出口をノズル部材の中心軸に対し等しい角度で傾斜させる。
なお、吐出口とワークとの距離hを非常に小さい距離に設定する場合には、各吐出口の噴出角度をノズル部材の中心軸から離れる方向(放射状)に設定し、ワーク上で液滴を結合させることも可能である。
Claims (23)
- 塗布装置を用いて塗布対象物上に描画線を線状塗布する方法において、
前記塗布装置が、
吐出装置と、
塗布対象物を載置するワークテーブルと、
吐出装置とワークテーブルとを相対移動させる駆動装置と、
吐出装置および駆動装置の動作を制御する制御部と、
を備え、
前記吐出装置が、
液体材料を吐出する複数の吐出口を有するノズルと、
前記複数の吐出口と複数の吐出流路を介して連通する液室と、
前記液室内の液体材料に接触する吐出部材と、
を備え、
前記吐出部材により前記液室内の液体材料に慣性力を与えて前記複数の吐出口から同時に吐出し、塗布対象物上で複数の液滴を形成すること、
前記複数の吐出口が、直線であるノズル配置線に沿って前記ノズルに配置されること、
前記ノズル配置線を前記描画線の描画方向と一致させること、
前記複数の吐出口から、吐出された複数の液塊が塗布対象物に着弾する前に接触せず、且つ、前記ノズル配置線に沿って着弾した液体材料が塗布対象物上で結合するように液体材料を吐出して線状塗布を行うことを特徴とする塗布方法。 - 前記制御部が、前記吐出装置と前記ワークテーブルとを一定の速度Vcを保持してノズル配置線と同じ方向に相対移動させながら、前記吐出された複数の液塊の少なくとも一つが、直前に吐出された塗布対象物上の液体材料に結合して描画線を形成するように、前記吐出装置と前記ワークテーブルとの相対移動速度に基づき吐出のタイミングを一定の間隔Tcとして線状塗布を行うことを特徴とする請求項1に記載の塗布方法。
- 前記吐出部材の推進力を調節することにより、前記吐出された複数の液塊が塗布対象物に着弾する前に接触せず、且つ、前記ノズル配置線に沿って着弾した液体材料が塗布対象物上で結合するように液体材料を吐出することを特徴とする請求項1または2に記載の塗布方法。
- 前記複数の吐出流路が、前記複数の吐出流路の各中心線が前記ノズルの中心線と交わるように、傾斜をもって配置され、
吐出口と塗布対象との距離hを調節することにより、液滴間の距離を調節することを特徴とする請求項1ないし3のいずれかに記載の塗布方法。 - 前記複数の吐出口のいずれもが、前記ノズル配置線上に配置され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塗布方法。
- 前記複数の吐出口がいずれも同一形状であり、等ピッチに配置される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塗布方法。
- 前記複数の吐出口が偶数個の吐出口からなり、二個の大型吐出口と、二個の小型吐出口とを含み、吐出口のいずれもが前記ノズル配置線上に配置されること、並びに、
前記小型吐出口と前記大型吐出口とが前記ノズル配置線に沿って交互に配置されることを特徴とする請求項1ないし6のいずれかに記載の塗布方法。 - 前記複数の吐出口が偶数個の吐出口からなり、二個の大型吐出口と、二個の小型吐出口群とを含み、前記大型吐出口のいずれもが前記ノズル配置線上に配置されること、
前記小型吐出口群と前記大型吐出口とが前記ノズル配置線に沿って交互に配置されること、並びに、
前記小型吐出口群が、前記ノズル配置線に対して対称に配置された複数の小型吐出口から構成されることを特徴とする請求項1ないし6のいずれかに記載の塗布方法。 - 前記吐出装置または前記ワークテーブルが、回転機構を備え、
前記回転機構により、前記ノズル配置線を前記描画線の描画方向と一致させることを特徴とする請求項1ないし8のいずれかに記載の塗布方法。 - 前記線状塗布が、第一の方向に延びる直線状の塗布線と第一の方向と異なる第二の方向に延びる直線状の塗布線とを含む塗布パターンに従い行われることを特徴とする請求項9に記載の塗布方法。
- 前記ノズルが、前記吐出装置に対し着脱自在に固定されており、
前記吐出装置が、前記ノズル配置線の方向が前記吐出装置に対して一定になるように前記ノズルを取り付け可能とする位置決め機構を有することを特徴とする請求項1ないし10のいずれかに記載の塗布方法。 - 吐出装置と、塗布対象物を載置するワークテーブルと、吐出装置とワークテーブルとを相対移動させる駆動装置と、吐出装置および駆動装置の動作を制御する制御部と、を備える塗布装置において、
前記吐出装置が、
液体材料を吐出する複数の吐出口を有するノズルと、
前記複数の吐出口と複数の吐出流路を介して連通する液室と、
前記液室内の液体材料に接触する吐出部材と、を備え、
前記吐出部材により前記液室内の液体材料に慣性力を与えて前記複数の吐出口から同時に吐出し、塗布対象物上で複数の液滴を形成可能な吐出装置であって、
前記複数の吐出口が、直線であるノズル配置線に沿って前記ノズルに配置されること、
前記制御部が、前記ノズル配置線を描画線の描画方向と一致させた状態で、前記複数の吐出口から、吐出された複数の液塊が塗布対象物に着弾する前に接触せず、且つ、前記ノズル配置線に沿って着弾した液体材料が塗布対象物上で結合するように液体材料を吐出して線状塗布を行うことを特徴とする塗布装置。 - 前記制御部が、前記吐出装置と前記ワークテーブルとを一定の速度Vcを保持してノズル配置線と同じ方向に相対移動させながら、前記吐出された複数の液塊の少なくとも一つが、直前に吐出された塗布対象物上の液体材料に結合して描画線を形成するように、前記吐出装置と前記ワークテーブルとの相対移動速度に基づき吐出のタイミングを一定の間隔Tcとして線状塗布を行うことを特徴とする請求項12に記載の塗布装置。
- 前記制御部が、前記吐出部材の推進力を調節することにより、前記吐出された複数の液塊が塗布対象物に着弾する前に接触せず、且つ、前記ノズル配置線に沿って着弾した液体材料が塗布対象物上で結合するように液体材料を吐出することを特徴とする請求項12または13に記載の塗布装置。
- 前記複数の吐出流路が、前記複数の吐出流路の各中心線が前記ノズルの中心線と交わるように、傾斜をもって配置されていることを特徴とする請求項12ないし14のいずれかに記載の塗布装置。
- 前記複数の吐出口のいずれもが、前記ノズル配置線上に配置されることを特徴とする請求項12ないし15のいずれかに記載の塗布装置。
- 前記複数の吐出口がいずれも同一形状であり、等ピッチに配置されることを特徴とする請求項12ないし16のいずれかに記載の塗布装置。
- 前記複数の吐出口が偶数個の吐出口からなり、二個の大型吐出口と、二個の小型吐出口とを含み、吐出口のいずれもが前記ノズル配置線上に配置されること、並びに、
前記小型吐出口と前記大型吐出口とが前記ノズル配置線に沿って交互に配置されることを特徴とする請求項12ないし17いずれかに記載の塗布装置。 - 前記複数の吐出口が偶数個の吐出口からなり、二個の大型吐出口と、二個の小型吐出口群とを含み、前記大型吐出口のいずれもが前記ノズル配置線上に配置されること、
前記小型吐出口群と前記大型吐出口とが前記ノズル配置線に沿って交互に配置されること、並びに、
前記小型吐出口群が、前記ノズル配置線に対して対称に配置された複数の小型吐出口から構成されることを特徴とする請求項12ないし17いずれかに記載の塗布装置。 - 前記吐出装置または前記ワークテーブルが、回転機構を備え、
前記制御部が、前記回転機構により、前記ノズル配置線を前記描画線の描画方向と一致させることを特徴とする請求項12ないし19のいずれかに記載の塗布装置。 - 前記駆動装置が、前記吐出装置と前記ワークテーブルとを相対的に直線移動可能な一軸駆動機構を含み、
前記ノズル配置線が前記一軸駆動機構の駆動方向と一致して配置されることを特徴とする請求項12ないし20のいずれかに記載の塗布装置。 - 前記ノズルが、前記吐出装置に対し着脱自在に固定されており、
前記吐出装置が、前記ノズル配置線の方向が前記吐出装置に対して一定になるように前記ノズルを取り付け可能とする位置決め機構を有することを特徴とする請求項12ないし21のいずれかに記載の塗布装置。 - 前記吐出装置が、
前記液室より小径であり、先端部が液室内を進退動するプランジャーと、
前記プランジャーを進退動させるプランジャー往復移動装置と、
前記液室に液体材料を供給する液送装置と、を備え、
前記プランジャーの先端部の側面と前記液室の内側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体材料に慣性力を与えて前記複数の吐出口から同時に吐出することを特徴とする請求項12ないし22のいずれかに記載の塗布装置。
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CN106102933A (zh) | 2016-11-09 |
KR20160132381A (ko) | 2016-11-18 |
TWI739365B (zh) | 2021-09-11 |
CN106102933B (zh) | 2021-03-12 |
EP3117909A1 (en) | 2017-01-18 |
KR102314565B1 (ko) | 2021-10-18 |
TW202031363A (zh) | 2020-09-01 |
TW201544186A (zh) | 2015-12-01 |
JPWO2015137271A1 (ja) | 2017-04-06 |
US20170066005A1 (en) | 2017-03-09 |
US10449565B2 (en) | 2019-10-22 |
JP6538649B2 (ja) | 2019-07-03 |
TWI692379B (zh) | 2020-05-01 |
EP3117909A4 (en) | 2017-10-25 |
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