TW201330933A - Valve for ejecting small amount of liquid material and capable of being assembled and disassembled without use of tool - Google Patents

Abstract

A valve (10) for ejecting a small amount of liquid material includes a liquid material ejection valve body (28) and a prevention member (30). The liquid material ejection valve body (28) is provided with: a cylinder section (14) in which a piston body (12) is mounted so that the piston body (12) can move vertically; an adjuster section (16) which has a micro-adjustment mechanism and which is fitted to the base end side of the cylinder section (14); a fluid body section (22) which has both a liquid material inlet section (18) into which a liquid material from a liquid material source is caused to flow and an air inlet section (20) into which compressed air from compressed air source is caused to flow; a discharge nozzle (74) which is mounted to the fluid body section (22) so as to communicate therewith and which has an opening (77); and a needle body (26) which is fitted along the axis of the piston body (12) and which has a front end reaching the opening of the discharge nozzle (74). The prevention member (30) affixes the adjuster section (16) and the fluid body section (22) in order to prevent the adjuster section (16) and the fluid body section (22) from being detached from the cylinder section (14).

Description

Liquid material injection valve with low discharge capacity without tools

The present invention relates to a liquid material injection valve for a low discharge amount; the liquid material injection valve for a low discharge amount is a liquid photoresist for a semiconductor wafer, a glass substrate, various resin substrates, and a metal member or the like. A liquid material such as a agent, a surface protective film or a functional coating agent, in particular, a liquid material containing a particulate matter (hereinafter referred to as a filler-containing liquid material) is extremely finely atomized to form a thin film formation.

In the case of a semiconductor polysilicon wafer or a glass substrate and various members, when a film containing a conductive paste or a liquid material containing a phosphor material is used, film formation by a dispenser or by screen printing is used. Coating technology such as film formation.

A liquid material containing a filler, if a non-high-viscosity liquid material causes sedimentation or agglomeration of the filler, it is mixed with a diluent solvent or the like to form a film having a low viscosity and is sprayed by a sprayer, a dispenser, or other coating method. Cloth is not possible.

Therefore, in order to prevent the sedimentation of the filler, these materials become coated in a liquid material having a high viscosity. In the high-viscosity material, since the atomizer cannot perform stable atomization with a low discharge amount, a material of a high viscosity region of 500 CPS or more in which the filler does not settle is used, for example, by a dispenser or a screen printing method. The entire surface of the surface of the LED element mounted on the wafer from 5 mm square to 10 mm square law.

At this time, the manner in which the foam is not generated by the mixing and agitation must be mixed and stirred while vacuum defoaming. In addition, at the time of coating, the filler material must be uniformly dispersed and laminated on the film formation surface, so that the discharge amount management, the viscosity management, and the like are increased, and the coating machine other than the production is used. The decomposition and washing of the liquid-receiving part require a large maintenance cost and waste outside the operation time.

For example, a phosphor is directly contacted on the surface of an LED chip having a square size of 2 mm to a square size of 3 mm, which is made of a semiconductor of GaN or InGaN, and is excellent in luminous efficiency, and thus the phosphor is used. The powder is mixed in a solvent or the like and applied directly to the surface of the semiconductor wafer, and then the solvent is preferably evaporated. A low-viscosity coating material in which a phosphor powder is mixed with a solvent or a solvent containing a part of an insulating material, and a discharge valve that is applied while being stirred without being settled or agglomerated is considered as a spray gun itself. It is impossible to construct a machine that can fully spray while being able to spray. Therefore, as a method of obtaining a stirring effect, there is a method of circulating a low-viscosity liquid, but it is impossible to prepare a circulation circuit in the vicinity of the discharge nozzle and the needle of the control atomizer.

Therefore, a spray device having a small amount of liquid which is formed by ultrasonic atomization or airbrush spray to form a liquid equal to or higher than a level formed by ultrafine particles or a fine particle of a melt is proposed, which can be easily and surely To adjust the supply of a small amount or a small amount of liquid in the desired amount, and to coat the coated object efficiently, and to coat the semiconductor wafer or the glass substrate and various transparent members. Object to A liquid or a melt which is a film-forming liquid photoresist or a surface protective film or a functional coating agent is spray-coated uniformly and thinly (Patent Document 1).

However, the spray device for a small amount of liquid as described above is because the liquid material containing the filler is treated, so that the mesh is easily clogged. When the mesh is clogged, the number of components is large, so it is decomposed and cleaned or washed. Waiting for maintenance work is very troublesome.

Further, since the spray device for a small amount of liquid as described above is mostly used for mounting on an industrial robot arm, it is more troublesome to perform maintenance work such as cleaning or cleaning.

Thus, in the conventional two-fluid type air spray valve or the airbrush type spray valve, in particular, in order to generate molten liquid from the atomized particles, a compressed air is used to remotely operate to form a circular pattern of intermittent motion or continuous. A valve for automatic injection of an automatic spray gun (hereinafter referred to as an automatic gun) having a linear pattern of sexual action is fixedly assembled in order to maintain confidentiality and mechanical strength using several types of locking screws. Therefore, in order to clean the liquid contact portion of the coating liquid, it takes time to loosen the fixing locking screw, and the consumption caused by the repeated operation of the locking screw or the like, or the number of components is large. Loss of components can also occur, and there are difficulties in maintainability and cost.

Patent Document 1: Japan Special Open 2009-28701

The present invention has been made in view of the above problems of the prior art, and is capable of being easily disassembled and assembled without tools, and is easy to clean or It is a liquid material injection valve for low discharge amount for maintenance work such as cleaning.

The present invention is a method of spraying a gas brush, which is also called a special spray method in an air sprayer, in order to solve such problems, and is made by a single touch without using a screwdriver or a wrench. One touch) The liquid material injection valve having a low discharge amount that can be decomposed and assembled is found to solve the above problems, and the present invention has been completed.

In order to solve the above problems, the liquid material injection valve for low discharge amount which can be disassembled and assembled without using a tool according to the present invention includes: a liquid material injection valve body and a fastening member; the liquid material injection valve body is a cylinder portion, an adjuster portion, a flow body portion, a discharge nozzle, and a needle body; the cylinder portion is configured to be capable of moving a piston body up and down, and the adjuster portion has a fitting a fine adjustment mechanism for moving the piston body up and down on a proximal end side of the cylinder portion, the flow body portion having a liquid material that is fitted to a front end side of the cylinder portion and that flows a liquid material from a liquid material source An inflow portion and an air inflow portion that flows in compressed air from a compressed air source, the discharge nozzle being connected to the flow body portion and having an opening, the needle body being inserted into an axis of the piston body The front end reaches the opening of the discharge nozzle, and the fastening member is used to fix the adjuster portion and the flow body portion to prevent Flow regulator portion off from the body portion of the cylinder portion.

In the patent specification of the present invention, the low discharge amount means a discharge amount of about 0.1 cc to 5 cc per minute.

As described above, there is an advantage that it can be easily disassembled and assembled without using a tool, and it is easy to perform maintenance work such as cleaning or washing.

Further, the adjuster portion and the flow body portion have an annular outer circumference, and a concave portion is provided on the outer circumference of the annular shape, and the fastening member has an engaging member that is engaged with the concave portion, and The engagement member is engaged with the recess, so that the liquid material injection valve body is fitted and supported by the fastening member.

Further, the fastening member has a base portion and first and second U-shaped engaging members that rotatably support the lower end portion to the base portion, and the first and second U-shaped engaging members are A gap of a lower end portion of the second U-shaped engaging member is inserted into the liquid material injection valve main body to engage the lower end portion of the first and second U-shaped engaging members with an annular outer circumference of the flow main body portion The recessed portion and the upper end portion of the first and second U-shaped engaging members are engaged with the annular outer peripheral recess of the adjuster portion, and the liquid material injection valve body can be fitted and supported The construction of the fastening member is preferred.

Further, a liquid material discharge portion may be provided in the flow body portion, and the liquid material inflow portion and the liquid material discharge portion may be communicated such that a remaining portion of the liquid material flowing in from the liquid material inflow portion is discharged by the liquid material The portion is discharged, and by returning to the source of the liquid material, the liquid material is configured to be circulated.

Further, the liquid material is made of a liquid material containing a filler, and The injection valve is a liquid material injection valve for injecting the liquid material containing the filler, and the needle body has a tip end tapered shape, and the discharge nozzle has a contact end piece at its tip end. The annular sheet body has an abutting surface corresponding to the inclination of the tip end of the needle body, and the front end of the needle body is formed to protrude from the tip end of the discharge nozzle, and the amount of the leading end of the needle body can be adjusted to adjust the above The discharge amount of the liquid material containing the filler is ideal. In such a configuration, in particular, the average particle diameter of the filler is about 8 to 10 μm, and the maximum particle diameter is 30 μm, which is particularly suitable. Further, at this time, it is appropriate that the front end angle of the needle body is 5° to 30°. Further, the particle size distribution of the filler can be measured by a dynamic light scattering method using an active light scattering type particle diameter distribution measuring apparatus or the like.

The liquid material may be a liquid material containing a filler, the injection valve is a liquid material injection valve for injecting the liquid material containing a filler liquid, and the needle body has a tip end tapered shape, and the discharge is performed. The nozzle is provided with an abutting annular piece having an abutting portion corresponding to the inclination of the tip end of the needle body, and the front end of the needle body is prevented from protruding from the tip end of the discharge nozzle by adjusting The amount of pulling of the needle body is such a configuration that the discharge amount of the filler-containing liquid material can be adjusted. In such a configuration, in particular, the average particle diameter of the filler is about 20 to 30 μm, and the maximum particle diameter is 80 μm, which is particularly suitable. Further, at this time, it is appropriate that the front end angle of the needle body is 45° to 120°.

An air cover for restricting a flow path of the compressed air is provided below the opening of the discharge nozzle, and when the liquid material is discharged, it is preferable to form a flow of the misty air.

The flow of the misty air is suitably generated by the inner wall flow path formed on the inner wall surface of the air cover.

Then, in the inner wall flow path, five or more grooves are formed, and the groove is bundled toward the outlet opening of the air cover, and a notch portion corresponding to the groove is formed in the outlet opening.

Further, it is preferable that the flow of the mist-like air is generated by a peripheral flow path formed around the outlet opening of the air cover.

Further, the air cover may be provided with an inner cover and an outer cover, and an outer peripheral flow path may be formed radially on an outer peripheral surface of the inner cover, and the outer peripheral flow path may be converged toward the outlet opening.

It is preferable that the mist-like air is mixed with the liquid material from the outlet opening of the air lid while being rotated.

By using the liquid material injection valve for low discharge amount of the present invention, a liquid photoresist, a surface protective film or a function is applied to a coated object such as a semiconductor polyfluorene oxide wafer, a glass substrate, various resin substrates, and a metal member. A liquid material such as a coating agent, in particular, a liquid material containing a filler containing a particulate material is atomized finely, and a thin film can be formed.

For example, even with the white illumination technology using LEDs, it is possible to produce white LEDs for the LED elements in which GaN or InGaN wafers are mounted, and the YAG phosphor which is easy to settle is liquid-coated while being coated with liquid. Great contribution to improving quality and productivity.

When the liquid material containing the filler is applied, after the liquid material sprays the spray valve, the liquid contact portion is pushed out by the washing liquid and washed. It is necessary to clean the liquid contact portion in order to prevent the mesh from being clogged, and it is necessary to clean the concave portion of the liquid contact portion in detail. In the liquid material injection valve for low discharge amount of the present invention, cleaning is easy to be decomposed and assembled in a short time with an unused tool, and has the advantage of being advantageous for reducing maintenance other than coating work and improving productivity. .

According to the unused tool of the present invention, it is possible to disassemble the assembled liquid material injection valve for low discharge amount, and it is possible to provide a low discharge amount capable of being easily disassembled and assembled without using a tool, and which is easy to perform maintenance work such as cleaning or washing. A significant effect of the injection valve with liquid material.

Further, the unused tool according to the present invention is capable of disassembling the assembled liquid material injection valve for low discharge amount, and has a fixing screw which is required to reduce the number of components and minimize the assembly of each component, and is manually operated by a person. The effect of assembly can be decomposed by touch.

Furthermore, the unused tool according to the present invention is capable of decomposing the assembled liquid material injection valve for low discharge amount, and for the semiconductor polysiloxane wafer or the glass substrate and various members, in particular, the conductive paste may be contained or formed. The insulating liquid material of the phosphor used in the LED can be formed into a circular pattern having a diameter of 10 mm or less, in particular, about 2 mm to 9 mm, or a width of 10 mm or less, especially 1 mm, by spray coating uniformly and thinly. Film formation of a linear pattern of about 9 mm.

Hereinafter, the embodiments of the present invention will be described, but these embodiments are illustratively shown, and of course, the technical idea of the present invention is not exceeded. The range of the more can be deformed.

In the figure, reference numeral 10 denotes an embodiment of a liquid material injection valve for low discharge amount which can be disassembled and assembled by an unused tool of the present invention.

The liquid material injection valve 10 for low discharge amount is composed of a liquid material injection valve body 28 and a fastening member 30 as detailed in FIGS. 1 and 2; the liquid material injection valve body 28 is The cylinder portion 14 and the adjuster portion 16 and the flow body portion 22, the discharge nozzle 74, and the needle body 26 are provided. The cylinder portion 14 is configured to be capable of moving the piston body 12 up and down, and the adjuster portion 16 is a fine adjustment mechanism that is fitted to the base end side of the cylinder portion 14 and that moves the piston body 12 up and down. The flow body portion 22 is fitted to the front end side of the cylinder portion 14. a liquid material inflow portion 18 that flows into a liquid material from a liquid material source, and an air inflow portion 20 that flows into compressed air from a compressed air source. The discharge nozzle 74 is connected to the flow body portion 22 and has an opening portion. 77. The needle body 26 is inserted into the axis of the piston body 12 such that the front end reaches the opening 77 of the discharge nozzle 74, and the fastening member 30 is for fixing the adjuster portion 16. With the flow body 22, in case The adjuster portion 16 and the flow body portion 22 are separated from the cylinder portion 14.

As shown in FIG. 2, the adjuster unit 16 includes an adjusting screw 34 that is inserted into the adjusting ring 32, and an upper body portion 38 that receives the adjusting screw 34 through the O-ring 36, and The fine tuning mechanism is capable of fine tuning.

The upper body portion 38 located at the lower end portion of the adjuster portion 16 has an annular outer circumference 40, and a concave portion 42 is provided on the annular outer circumference 40. Also, symbol 44 is an interlocking ring for secure assembly.

The cylinder portion 14 has a needle-shaped retainer 46, a piston body 12, a cylinder block 52, and an intermediate portion 54 as shown in Fig. 2; the needle retainer 46 is for holding the needle body 26, the piston body 12 is externally inserted with a spring 48, the cylinder block 52 is mounted with a large O-ring 50, so that the piston body 12 is received, the intermediate portion 54 is screwed or embedded In the cylinder block 52, air is supplied to the lower portion of the piston body 12, and is used to push the piston body 12 upward.

The intermediate portion 54 has an opening 53 at the center, and the needle 26 is inserted into the axis of the piston body 12 through the needle retainer 46, and is inserted through the small O-ring 56 to the middle. Body 54.

In the intermediate portion 54, the inlet joint 58 for compressed air is installed, and the piston body 12 is pushed upward by the compressed air from the compressed air supply source. In this way, the piston body 12 is made movable up and down by adjusting the supply amount of the compressed air.

A flow body portion 22 is fitted to the lower end portion of the intermediate portion 54 located at the front end of the cylinder portion 14. On the side of the flow body portion 22 described above, except for the inlet joint 60 to which the return pipe for connecting the liquid material is attached In addition, the liquid material inflow portion 18 passes through the seal ring 62 and the lock nut 64, and the liquid circulation joint 66 is screwed, and the liquid circulation joint 66 passes through the embedded R joint 68. A liquid container 70 for containing the coated liquid material is mounted.

Further, the liquid material discharge portion 92 is provided in the flow main body portion 22, and the liquid material inflow portion 18 and the liquid material discharge portion 92 communicate with each other through the flow path 94 to make the remaining portion of the liquid material flowing in from the liquid material inflow portion 18. It is discharged by the liquid material discharge portion 92 and is returned to the source of the liquid material to form the liquid material in a manner of being circulated.

Further, an air joint 72 for compressed air is attached to the air inflow portion 20 provided on the side surface of the flow body portion 22, and compressed air is supplied from the compression supply source.

A needle cover 24 and an air cover 78 are spirally attached to the center of the lower surface of the flow main body portion 22, and the needle cover 24 is for covering: the needle body 26 is inserted in the center, and the liquid material is discharged together with the air. The discharge nozzle 74 and the needle body 26; the air cover 78 is used to restrict the flow path of the compressed air.

The fastening member 30 includes a base portion 80 and a first U-shaped engaging member 82 and a second U-shaped engaging member 84 that rotatably support the lower end portion to the base portion 80, The first U-shaped engaging member is inserted into the gap 86 of the lower end portion of the first U-shaped engaging member 82 and the second U-shaped engaging member 84 by inserting the liquid material injection valve body 28 into the gap 86 of the lower end portion of the first U-shaped engaging member 82 and the second U-shaped engaging member 84. 82 and the lower end portion of the second U-shaped engaging member 84 are engaged with the concave portion of the annular outer circumference of the flow main body portion 22 88. The upper end portion of the first U-shaped engaging member 82 and the second U-shaped engaging member 84 is engaged with the concave portion 42 of the annular outer circumference of the adjuster portion 16, so that the liquid material can be made. The injection valve body 28 is fitted and supported by the fastening member 30. Further, the fastening member 30 is attached to a desired portion by a mounting bolt 90.

Hereinafter, an assembly example of the low-discharge amount liquid material injection valve 10 of the present invention described above is shown in FIGS. 3 and 4 .

The discharge main body portion 22 of the discharge nozzle 74 or the needle cover 24 and the air cover 78 is screwed to be engaged with the intermediate portion 54 and assembled, and inserted into the first U-shaped shape of the fastening member 30. The gap 82 between the lower end portion of the member 82 and the second U-shaped engaging member 84 is further engaged and fixed to the lower end portion of the first U-shaped engaging member 82 and the second U-shaped engaging member 84. The concave portion 88 of the annular outer circumference of the main body portion 22 [Fig. 3(a) and Fig. 3(b)].

Then, the piston body 12 and the spring 48 are inserted into the cylinder block 52, and are fitted and assembled with the intermediate portion 54, and then the upper body portion 38 is fitted and assembled [Fig. 3(c) to Fig. 3(e)] .

Then, the upper end portion of the first U-shaped engaging member 82 and the second U-shaped engaging member 84 of the fastening member 30 is engaged with the concave portion 42 of the annular outer circumference of the adjuster portion 16 [3 (f ) and Figure 3(g)].

After the needle body 26 is fixed to the piston body 12 by the needle retainer 46, the adjuster portion 16 for moving the piston body 12 up and down to adjust the liquid amount of the liquid material is screwed into the cylinder portion 14 to assemble [3rd ( h) Figure to Figure 3(k)].

In this way, all components can be assembled by fitting or screwing, and because the number of components is small, assembly is easy, and a series of assembly operations can be completed in two minutes.

Of course, the decomposition is also performed using the opposite procedure to the assembly. The decomposition work time can also be completed in half the assembly time (about 1 minute).

Further, the illustrated flow main body portion 22 is a circulation type. The flow prevention main body portion 22 in front of the discharge nozzle 74 is connected to the small circulation loop through the inlet joint 60 to obtain a sedimentation preventing effect of the filler-containing liquid material. Air brushes are a way to use small spray hand-held dispensing valves that are often used to paint plastic model components or small items.

The diameter of the opening of the discharge nozzle 74 is 0.5 mm or less, and the needle body 26 used for controlling the discharge of the paint has a needle shape, and when the coating liquid (liquid material) flows out along the needle-shaped needle body 26, It is atomized by the discharge effect of the surrounding compressed air [refer to Figs. 5(a) and 5(b)].

The discharge amount of the liquid material can be carried out by the pull adjustment of the needle body 26 by manual work, but it is necessary to be quite skilled in adjusting the quantitative control, and the width of the sprayed pattern to be applied is When the distance between the tip end of the discharge nozzle 74 and the surface to be coated is about 20 to 40 mm, it is narrowed to 10 mm.

However, the amount of discharge can be reduced to less than 1 cc per minute, and even if the tip end of the discharge nozzle 74 is close to the coated surface by about 10 mm, liquid fine particles of 10 μm or less can be formed, and the coating efficiency is close to discharge. Since the nozzle 74 is applied to the object to be coated with high efficiency of 80% or more.

In the present invention, the above-described hand coating air brushing method is used in the automatic coating nozzle mechanism, or a small circulation circuit is added in front of the discharge nozzle 74, and a filler-containing liquid which is easy to settle, for example, is successfully implemented. The material was spray coated uniformly.

For example, a resin containing a diluent solvent having a viscosity of 50 CPS or less can be formed into a circular pattern having a diameter of 10 mm or less without lowering the coating efficiency even when the volume ratio is approximately 30% or so. It is a film formation of a linear pattern having a width of 10 mm or less.

Further, in the liquid material injection valve 10 for low discharge amount of the present invention, the tip end portion of the needle body 26 for controlling the liquid material discharge mechanism for the discharge nozzle 74 having a diameter of 0.5 mm or less has an acute angle of 10 or less. The structure is protruded to the center hole of the needle cover 24 of the outlet hole of the discharge nozzle 74, and when the liquid material is discharged, the opening degree of the pulling amount of the needle body 26 can be adjusted in units of 10 μm. Atomize the air.

By attaching the adjusting screw 34 capable of adjusting the pulling amount of the needle body 26 in units of 10 μm, the reproducibility of the discharge amount of the opening and closing valve can be ensured, and stable discharge can be obtained.

The discharge of the liquid material is such that when the liquid material is oozing out along the front end portion of the extremely thin needle body 26, the liquid material is atomized by the negative pressure effect of the compressed air flow of 0.2 MPa or less around it, and the hole diameter is 0.5. The discharge nozzle 74 having a diameter of mm or less is ejected, and the needle cover 24 having a diameter of 2.0 mm or less is used. The swirling air flow having a compression pressure of 0.2 MPa or less can further promote the atomization and diffusion of the liquid material to the atomization pattern region by the collision diffusion.

Further, in the example of Fig. 5, the front end of the needle body 26 is tapered, and the front end angle θ 1 is 5°, and the discharge nozzle 74 is provided with abutting annular piece at the front end thereof. The body 75 has an abutting surface corresponding to the front end angle θ 1 of the needle body 26, and the front end of the needle body 26 is formed to protrude from the front end of the discharge nozzle 74 by adjusting the needle The amount of pulling of the body 26 is such that the amount of discharge of the liquid material containing the filler can be adjusted (see FIGS. 5(c) and 5(d)). In such a configuration, the liquid material is a liquid material containing a filler, and the filler has a small size, and particularly, the average particle diameter of the filler is about 8 to 10 μm, and the maximum particle diameter is 30 μm.

As shown in Fig. 6, the liquid material injection valve 10 for low discharge amount has a liquid material tank 98 which is a liquid material source containing a filler liquid material which is frequently stirred by the electromagnetic stirrer 96. The liquid material supply pipe 102 for quantitatively supplying the stored liquid material by the liquid material dosing pump 100 is prepared with a liquid material return pipe 104 for recirculating the liquid material to the liquid material tank 98, and low. The discharge amount is constantly returned to the liquid material tank 98 irrespective of the action of the liquid material injection valve 10. The liquid material supply pipe 102 is connected to the liquid container 7, and the liquid material return pipe 104 is connected to the liquid material discharge portion 92 through the inlet joint 60.

The discharge pressure when the liquid material injection valve 10 is discharged with a low discharge amount is the pressure applied to the liquid material supply pump 100. The pressure of the material return piping that resists pressure. Further, in the intermediate portion 54 of the liquid material injection valve 10 for low discharge amount, the valve operation compressed air supply pipe 106 is connected through the inlet joint 58, and the flow main body portion 22 is connected to the flow through the air joint 72 for atomization. The compressed air supply pipe 108 is provided, and the respective air pressure regulators are capable of adjusting the compressed air pressure.

As an operation sequence of each solenoid valve, for example, the solenoid valve for atomization is normally operated after about 100 ms after the start of the operation, and the solenoid valve for valve operation is first operated when the discharge is completed, and then the valve is finally operated. After approximately 50 ms, the order of the atomizing solenoid valves is completed, which is suitable for atomization of liquid materials.

The liquid material injection valve 10 for low discharge amount is operated by a solenoid valve for valve operation, and compressed air is supplied from the valve operation compressed air supply pipe 106 to the cylinder block 52 into which the piston body 12 is inserted, and the piston is inserted. The body 12 is operated on the side of the adjusting screw 34, and the rear end portion of the needle body 26 coupled to the piston body 12 is brought into contact with the adjusting screw 34, so that the stroke of the needle body 26 is stopped at a predetermined position.

Then, the front end portion of the needle body 26 is separated by the discharge nozzle 74, and the liquid material of the liquid material supply portion 110 in the flow body portion 22 is supplied by the liquid material to the pressure supply pressure of the pump 100, in order to prevent the liquid material. After the sedimentation, the flow rate of the liquid material in the tube can be set to a second speed of 3000 mm to 6000 mm, and the flow path 73 of the liquid material supply unit 110 in the flow main body portion 22 is made into a thin tube having a diameter of 1.5 mm or less, and is discharged from the inside of the discharge nozzle 74. When the front end surface of the needle 26 is pushed out, the atomization flow from the atomizing compressed air supply pipe 108 for the valve is used. The discharge effect of the compressed air, the liquid material on the front end portion of the needle body 26, is as shown in Fig. 7, and the atomic pattern is formed by atomizing the center outlet of the air cap 78 together with the atomized compressed air stream 112.

Thus, as shown in Fig. 7, it is attached to the inside of the LED element 114, and is particularly attached to the LED chip 116. The uncoated liquid material is returned to the liquid material tank 98 by entering the liquid material return pipe 104 made of a thin tube having a diameter of about 1.0 mm.

The atomized particles are of course attached to the LED chip 116 provided inside the LED element 114, and the excessively sprayed portion of the spray end is thinly attached to the thin wire for connection around it or is called Reflector of the reflector, etc. The film formation range can be adjusted by the compressed air supply pressure for atomization and the compressed air supply pressure (or flow rate) for the atomization pattern.

When the diameter of the atomization pattern is to be narrowed, the compressed air supply pressure (or flow rate) for the atomization pattern can be reduced, and the distance between the objects to be coated with the low-discharge amount liquid material injection valve 10 can be narrowed. When widened, the compressed air supply pressure (or flow rate) for the atomization pattern is increased, and the distance between the object to be coated and the liquid material injection valve 10 for low discharge amount is widened.

The amount of film formation, that is, the amount of discharge, is related to the amount of opening and closing of the adjusting screw 34 provided at the rear end portion of the liquid material injection valve 10 for low discharge amount. If the adjusting screw 34 is turned on, the amount of discharge will increase, and if it is turned off, the amount of discharge will decrease.

As shown in detail in Fig. 5, the liquid material injection valve 10 for low discharge amount shown as an example of the drawing is a circulation type used for circulating liquid materials. As described above, the liquid material is a liquid material containing a filler, and the filler has a small size, particularly, the average particle diameter of the filler is about 8 to 10 μm, and is particularly suitable when the maximum particle diameter is 30 μm.

On the one hand, the liquid material is a liquid material containing a filler, and when the filler is large in size, the average particle diameter of the filler is, in particular, about 20 to 30 μm, and the liquid having a low discharge amount when the maximum particle diameter is 80 μm is applied. The material injection valve is shown in Figure 9.

In Fig. 9, reference numeral 118 denotes another embodiment of the liquid material injection valve for low discharge amount. The liquid material injection valve 118 for the low discharge amount is formed so that the needle body 120 has a tapered shape, and the front end angle of the needle body 120 is larger than the needle body 26 of the liquid material injection valve 10 having a low discharge amount. In the example of Fig. 9, the front end angle θ 2 of the needle body 120 is 45°.

The liquid material injection valve 118 having a low discharge amount is a discharge nozzle 122 having an opening 123, and is provided with an abutting annular ring body 124 (in the illustrated example, an O-ring) having an abutting portion, and the abutting portion can be Corresponding to the inclination of the front end of the needle body 120, the front end of the needle body 120 is prevented from protruding from the front end of the discharge nozzle 122, and by adjusting the amount of pulling of the needle body 120, it is possible to adjust the liquid material containing the filler. The amount of discharge [see Figures 9(c) and 9(d)].

A needle body 120 is inserted into the center of the lower surface of the flow body portion 22, and a discharge nozzle 122 that discharges the liquid material together with the air is attached, and a cover member 126 having a needle cover and an air cover is screw-locked.

Low discharge volume with liquid material injection valve 118, where for other configurations Since the configuration is the same as that of the above-described low discharge amount liquid material injection valve 10, detailed description thereof will be omitted.

Hereinafter, a preferred embodiment of the air cover 76 or the cover member 126 used as the liquid discharge valves 10 and 118 for low discharge amounts of the present invention will be described. Further, since the cover member 126 has a needle cover and an air cover, it is only required to function as an air cover, and is included in the air cover described in the patent specification of the present invention.

Fig. 10 and Fig. 11 show an embodiment of an air cover which is used as the liquid material injection valves 10 and 118 for low discharge amounts of the present invention. The air cover 128 is provided below the opening of the discharge nozzles 74 and 122, and is an air cover for restricting a flow path of the compressed air, and is formed together with the liquid material when the liquid material is discharged. The flow of misty air.

In the illustrated example, the air cover 128 has a base portion 130, a convex portion 132 provided on the base portion 130, and an outlet opening portion 134 penetrating the convex portion 132. Further, as shown in detail in Fig. 10, the outlet opening portion 134 is formed in a star shape, and five notch portions 136 are formed.

Further, on the back side thereof, as shown in Fig. 11, an inner wall flow path 138 is formed. The inner wall flow path 138 is a groove corresponding to the notch portion 136 and is concentrated toward the outlet opening portion 134 of the air cover 128. The outlet opening portion 134 is formed as a notch portion 136 corresponding to the groove. In the example of Fig. 11, five grooves of the inner wall flow path 138 are formed. Therefore, when the liquid material is discharged, the atomized air from the compressed air source is propagated to the inner wall flow path 138 together with the liquid material. The discharge is performed from the notch portion 136, whereby the mist-like air can be formed together with the liquid material. Then, the mist-like air is mixed with the liquid material from the outlet opening portion 134 of the air lid 128 while being rotated, and is ejected.

In addition, in the example of FIG. 10 and FIG. 11, although the five stars which each formed the notch part 136 and the inner-wall flow-path 138 are shown, it is set as the notch part and inner- For example, it can also be applied to the form as shown in Fig. 12 and Fig. 13.

In FIG. 12, the air cover 140 has a base portion 142, a convex portion 144 provided on the base portion 142, and an outlet opening portion 146 penetrating the convex portion 144. Further, as shown in detail in Fig. 12, the outlet opening portion 146 is formed with eight notch portions 148. Further, an inner wall flow path is formed corresponding to the notch portion 148. In this way, five or more grooves in which the inner wall flow path is formed, and five or more notch portions are formed in accordance with this.

In Fig. 13, the air cover 150 has a base portion 152, a convex portion 154 provided on the base portion 152, and an outlet opening portion 156 that passes through the convex portion 154. Further, as shown in detail in Fig. 13, the outlet opening portion 156 is formed with five notch portions 158. The notch portion 158 has a shape in which a rectangular notch portion is radially enlarged, but a notch portion having such a shape can also be applied. Further, an inner wall flow path is formed corresponding to the notch portion 158. In this way, five or more grooves in which the inner wall flow path is formed are formed, and five or more notch portions are formed in accordance with this.

In the following, Fig. 14 shows another embodiment of the air cap used in the liquid material injection valves 10 and 118 for low discharge amounts of the present invention.

The air cover 160 has a base portion 162, an outlet opening portion 164 provided in the base portion 162, and a plurality of peripheral flow paths 166 formed around the outlet opening portion 164. The mist-like air flow is generated by a plurality of peripheral flow paths 166 formed around the outlet opening 164 of the air cap 160. Thereby, a misty air flow is formed together with the above liquid material. Then, the mist-like air is mixed with the liquid material from the outlet opening portion 164 of the air gap 160 while being rotated, and is ejected.

In the following, Fig. 15 and Fig. 16 show other embodiments of the air cap used in the liquid material injection valves 10 and 118 for low discharge amounts of the present invention.

The air cover 170 includes an inner cover 172 and an outer cover 184. The outer circumferential surface 174 is radially formed on the outer circumferential surface of the inner cover 172, and the outer circumferential flow path 174 is concentrated toward the inner outlet opening 176. The inner cover 172 is composed of a base portion 178, a plurality of radial convex portions 180 provided on the base portion 178, and an outer peripheral flow path 174 formed on the outer peripheral surface thereof. The outer cover 184 has an outer outlet opening portion 182 at the center thereof. Thus, the outer side cover 184 is fitted such that the flow path of the compressed air is restricted. Thereby, a flow of the misty air is formed together with the liquid material. Then, the mist-like air is mixed with the liquid material from the inner outlet opening portion 176 and the outer outlet opening portion 182 of the air lid 170 while being rotated, and is ejected.

The liquid material to be applied is electrostatically applied to the rear portion of the needle body of the liquid material injection valve from a low discharge amount, so that the size of the atomized liquid particles after the spray is made finer. The liquid material injection valve for low discharge amount of the present invention described above is a volume specific resistance value of 10 ¹³ Ω. Components other than the above components making insulating cm needle body connected to the rear portion of the needle body from the DC-10000V applying a DC high voltage with a high voltage wire coating, in particular a liquid material containing no filler is set to be ¹⁰⁶ Ω. When a polar solvent is applied in a volume or less of cm or less, and the electric conductivity is 10 mS/cm or less, it is possible to apply a low discharge amount having static electricity. The small liquid particles of the liquid material have a large increase in the content of the solid component, and therefore have a disadvantage of being less likely to adhere to the object to be coated, but are easily adhered by electrostatic force, and the coating efficiency is improved. The difference in coating efficiency when static electricity is applied and when no static electricity is applied is about 5 to 10%.

Also, the liquid material has an inherent impedance value of 10 Ω. The water-based material having a size of cm or less can suppress the scattering of fine particles by setting the electric conductivity to 5 mS/cm or less.

Example

The measurement experiment results of the liquid material injection valve for low discharge amount configured as described above are explained below.

(Example 1) Measurement of flow distribution of atomization pattern

(1) The viscosity of the liquid material was set at 30 CPS. For a polypyrene sealant stock solution having a weight ratio of 1 (100% NV value, 3000 CPS viscosity), a dilution solvent (mixing solvent of 1:1 weight ratio of methyl ethyl ketone to toluene) of 4 by weight is added and added a weight ratio of 1 YAG phosphor A liquid material having a viscosity of 30 CPS was obtained at a solid content ratio of 30% (approximately NV value of 17%).

(2) The specific gravity of the liquid material is 1.3.

(3) The liquid material dosing pump 100 is a hose pump having a hydraulic pressure of 0.01 MPa and a discharge amount of 60 cc/min.

(4) The distance from the discharge nozzle 74 to the object to be coated (a 200 mm square flat glass plate) is 20 mm.

(5) The pressure of the compressed air for atomization is changed to 0.1 MPa to 0.2 MPa, respectively.

(6) The spit time is as 100ms.

(7) The stroke amount of the needle body 26 formed by the adjusting screw 34 of the liquid material injection valve in accordance with the low discharge amount was made 1 mm, and the discharge amount was made 0.002 mg.

(8) The liquid material injection valve was fixed with a low discharge amount, and the film thickness distribution immediately below the measurement was measured. The results are shown in Fig. 8.

The coating conditions of A to C in Fig. 8 are shown in Table 1 below.

The experimental results formed by the above conditions are as shown in Fig. 8. All of them have a film thickness of 25 μm or less within a width of 10 mm, and a desired good coating state is obtained.

(Example 2) Evaluation of coating performance for a conductive substrate

(1) Material to be coated: made a surface resistance value of 10 ⁶ Ω. Cm ² conductive substrate

(2) The liquid material to be coated: an aqueous liquid moisture-proof insulating agent material having an aqueous component having a solid content of 26.2% (volume ratio) (manufactured by Nitto Emerging Co., Ltd.)

(3) Viscosity of liquid material: 10mPas

(4) Conductivity of liquid material: 2mS/cm

(5) Emulsion particle size: 0.2~6μm microsphere

(6) Low discharge amount with liquid material injection valve discharge amount: 4.6cc/min

(7) Movement speed of liquid material injection valve with low discharge amount: 200 mm/sec standard

(8) Coating width at 1 stroke: 8 ± 0.5 mm (almost no scattering)

(9) The distance between the liquid material injection valve and the substrate surface with a low discharge amount is 30 mm.

(10) Coating overlap coating pitch: 7.5mm

(11) Static voltage applied from the rear of the needle: DC-10000V, short-circuit current value 60μA

Under the above conditions, by applying a liquid material to a conductive substrate, a smooth coating surface having a thickness of 11 to 13 μm can be obtained. Also, the coating efficiency is 95%.

10, 118‧‧‧A liquid material injection valve with low discharge capacity that can be disassembled without tools

12‧‧‧ piston body

14‧‧‧Cylinder Department

16‧‧‧ Adjuster Department

18‧‧‧Liquid material inflow

20‧‧‧Air inflow

22‧‧‧Mobile Main Body

24‧‧‧ needle cover

26, 120‧‧‧ needle

28‧‧‧Liquid material injection valve body

30‧‧‧ fastening members

32‧‧‧Adjustment ring

34‧‧‧Adjustment screws

36‧‧‧O-ring

38‧‧‧Upper body

40‧‧‧ outer weeks

42, 88‧‧‧ recess

44‧‧‧Interlocking ring

46‧‧‧needle retainer

48‧‧‧ Spring

50‧‧‧O-ring

52‧‧‧Cylinder block

53, 77, 123‧‧‧ openings

54‧‧‧Intermediate Department

56‧‧‧O-ring

58, 60‧‧‧Inlet joints

62‧‧‧Seal ring

64‧‧‧Lock nut

66‧‧‧Liquid for fluid circulation

68‧‧‧R fittings

70‧‧‧Liquid container

72‧‧‧Air connector

73‧‧‧Flow

74, 122‧‧‧ spout nozzle

75‧‧‧Abutting annular sheet

78, 128, 140, 150, 160, 170‧‧‧ air cover

80‧‧‧Base section

82‧‧‧First U-shaped snap-fit member

84‧‧‧Second U-shaped snap-in member

86‧‧‧ gap

90‧‧‧Installation bolts

92‧‧‧Liquid material discharge department

94‧‧‧Flow

96‧‧‧Electromagnetic mixer

98‧‧‧Liquid material tank

100‧‧‧Liquid material supply pump

102‧‧‧Liquid material supply pipe

104‧‧‧Liquid material return pipe

106‧‧‧Compressed air supply piping for valve operation

108‧‧‧Compressed air supply piping for atomization

110‧‧‧Liquid Material Supply Department

112‧‧‧Compressed air flow for atomization

114‧‧‧ components

116‧‧‧ pointed

124‧‧‧Abutment to the annular ring

126‧‧‧covering components

130, 142, 152, 162, 178‧‧‧ pedestal

130, 132, 144, 154‧‧ ‧ convex

134, 146, 156, 164‧‧‧ exit openings

136, 148, 158‧‧ ‧ gap

138‧‧‧ inner wall flow path

166‧‧‧around flow path

172‧‧‧ gap

174‧‧‧ peripheral flow

176‧‧‧Inside exit opening

180‧‧‧ Radial convex

182‧‧‧Outer exit opening

184‧‧‧Outside gap

Fig. 1 is a perspective view showing an embodiment of a liquid material injection valve for low discharge amount in which an unused tool of the present invention can be disassembled and assembled.

Fig. 2 is an exploded perspective view showing an embodiment of a liquid material injection valve for low discharge amount in which an unused tool of the present invention can be disassembled and assembled.

3(a) to 3(f) are explanatory views showing the disassembly and assembly of the liquid material injection valve for low discharge amount which can be disassembled and assembled by the unused tool of Fig. 1.

4(g) to 4(j) are explanatory views of the exploded assembly of the liquid material injection valve for low discharge amount which can be disassembled and assembled by the unused tool of Fig. 1.

5(a) to 5(d) are cross-sectional views of the fastening member for removing the liquid material injection valve for low discharge amount shown in Fig. 1.

Figure 6 is a block diagram showing the operation of the valve.

Fig. 7 is a schematic view showing a state of use of a liquid material injection valve for low discharge amount which can be disassembled and assembled by using an unused tool of the present invention.

Fig. 8 is a graph showing the measurement results after the application of the liquid material, and shows a graph showing the relationship between the coating width and the film thickness.

9(a) to 9(d) are cross-sectional views showing another embodiment of the liquid material injection valve for low discharge amount in which the unused tool of the present invention can be disassembled and assembled, and the removal member is removed. Sectional view.

Fig. 10 is a perspective view showing an embodiment of an air cover used for the liquid material injection valve for low discharge amount of the present invention viewed from the front side.

Figure 11 is a low discharge amount used in the present invention as viewed from the back side. A perspective view of one embodiment of an air cap of a liquid material injection valve.

Fig. 12 is a front elevational view showing another embodiment of the air cap used in the liquid material injection valve for low discharge amount of the present invention.

Fig. 13 is a front elevational view showing still another embodiment of the air cap used in the liquid material injection valve for low discharge amount of the present invention.

Fig. 14 is a front elevational view showing another embodiment of the air cap used in the liquid material injection valve for low discharge amount of the present invention.

Fig. 15 is a perspective view showing another embodiment of the air cap used in the liquid material injection valve for low discharge amount of the present invention, showing the inner cover.

Fig. 16 is a perspective view showing a state in which the outer cover is attached to the inner cover of the air cover shown in Fig. 15.

10‧‧‧Disposable liquid material injection valve with low discharge capacity without tools

14‧‧‧Cylinder Department

16‧‧‧ Adjuster Department

22‧‧‧Mobile Main Body

28‧‧‧Liquid material injection valve body

30‧‧‧ fastening members

34‧‧‧Adjustment screws

38‧‧‧Upper body

42‧‧‧ recess

52‧‧‧Cylinder block

54‧‧‧Intermediate Department

58, 60‧‧‧Inlet joints

66‧‧‧Liquid for fluid circulation

68‧‧‧R fittings

72‧‧‧Air connector

78‧‧‧Air cover

80‧‧‧Base section

82‧‧‧First U-shaped snap-fit member

84‧‧‧Second U-shaped snap-in member

88‧‧‧ recess

90‧‧‧Installation bolts

Claims (14)

A liquid material injection valve for low discharge amount which can be disassembled and assembled without using a tool, comprising: a liquid material injection valve body and a fastening member; the liquid material injection valve body is provided with: a cylinder portion, and an adjustment a valve portion, a flow body portion, a discharge nozzle, and a needle body; the cylinder portion is configured to be capable of moving the piston body up and down, and the adjuster portion has a base end that is fitted to the cylinder portion a fine adjustment mechanism for moving the piston body up and down, the flow body portion having a liquid material inflow portion that flows into a liquid material from a liquid material source and flows in from the compressed air, which is fitted to a front end side of the cylinder portion An air inflow portion of the compressed air of the source, the discharge nozzle being connected to the flow body portion and having an opening, the needle being inserted into the axis of the piston body such that the tip reaches the discharge The fastening member for fixing the opening portion of the nozzle is for fixing the adjuster portion and the flow body portion to prevent the adjuster portion and the flow body portion Cylinder unit off. The liquid material injection valve for low discharge amount which can be disassembled and assembled without using a tool according to the first aspect of the invention, wherein the regulator portion and the flow body portion have an outer circumference of an annular shape, and the outer circumference of the annular shape a recessed portion is provided, and the fastening member has an engaging member that is engaged with the recessed portion, and the liquid material injection valve body is fitted and supported by the engaging member by engaging the engaging member with the recessed portion. The fastening member. The liquid material injection valve for low discharge amount which can be disassembled and assembled by the tool according to the second aspect of the invention, wherein the fastening member has a base portion and the lower end portion is rotatably supported by the above The first and second U-shaped engaging members of the base portion are inserted into the liquid material injection valve body by a gap between the lower end portions of the first and second U-shaped engaging members The lower end portion of the U-shaped engaging member is engaged with the annular outer peripheral recess of the flow body portion, and the upper end portions of the first and second U-shaped engaging members are engaged with the adjuster portion The annular outer peripheral recess can be fitted and supported by the liquid material injection valve body to the fastening member. The liquid material injection valve for low discharge amount which can be disassembled and assembled by the tool according to the first aspect of the invention, wherein the liquid material discharge portion is provided in the flow body portion, and the liquid material inflow portion and the liquid material discharge portion are communicated. The remaining portion of the liquid material flowing in from the liquid material inflow portion is discharged from the liquid material discharge portion, and is returned to the liquid material source so that the liquid material can be circulated. The liquid material injection valve for low discharge amount which can be disassembled and assembled according to the first aspect of the invention, wherein the liquid material is a liquid material containing a filler, and the injection valve is for spraying the filler-containing material. The low discharge amount of the liquid material is a liquid material injection valve, and the needle body has a tip end tapered shape, and the discharge nozzle is at the front end thereof. The abutting annular piece has an abutting surface corresponding to the inclination of the tip end of the needle body, and the front end of the needle body is formed to protrude from the front end of the discharge nozzle by adjusting the needle The amount of pulling of the body is such that the discharge amount of the above-mentioned filler-containing liquid material can be adjusted. The liquid material injection valve for low discharge amount which can be disassembled and assembled without using a tool according to the fifth aspect of the invention, wherein the needle body has a front end angle of 5 to 30 degrees. The liquid material injection valve for low discharge amount which can be disassembled and assembled according to the first aspect of the invention, wherein the liquid material is a liquid material containing a filler, and the injection valve is for spraying the liquid containing the filler. The low discharge amount of the material is a liquid material injection valve, the needle body is formed into a tip end tapered shape, and the discharge nozzle is provided with abutting annular sheet body having a tilt corresponding to the front end of the needle body. In the abutting portion, the front end of the needle body is prevented from protruding from the tip end of the discharge nozzle, and by adjusting the amount of pulling of the needle body, the discharge amount of the filler-containing liquid material can be adjusted. The liquid material injection valve for low discharge amount which can be disassembled and assembled without using a tool according to the seventh aspect of the invention, wherein the needle body has a front end angle of 45° to 120°. The liquid material injection valve for low discharge amount which can be disassembled and assembled without using a tool according to the first aspect of the invention, wherein the outlet portion of the discharge nozzle is provided with an outlet opening portion for restricting compressed air. The air cover of the flow path forms a flow of the misty air when the liquid material is discharged. The liquid material injection valve for low discharge amount which can be disassembled and assembled without using a tool according to claim 9, wherein the flow of the misty air is formed by an inner wall flow path formed on an inner wall surface of the air cover Produced. The liquid material injection valve for low discharge amount which can be disassembled and assembled without using a tool according to claim 10, wherein the inner wall flow path is formed by forming five or more grooves, and the groove is an outlet toward the air cover. The opening is closed, and a notch portion corresponding to the groove is formed in the outlet opening. The liquid material injection valve for low discharge amount which can be disassembled and assembled by the tool without the tool according to the ninth aspect of the invention, wherein the flow of the misty air is formed by a peripheral flow formed around the outlet opening of the air cover. The road is produced. The liquid material injection valve for low discharge amount which can be disassembled and assembled without using a tool according to claim 9, wherein the air cover is provided with an inner cover and an outer cover, and is formed radially on an outer peripheral surface of the inner cover. There is a peripheral flow path, and the outer peripheral flow path is converged toward the outlet opening. The liquid material injection valve for low discharge amount which can be disassembled and assembled without using a tool according to the ninth aspect of the invention, wherein the misty air is mixed with a liquid material from an outlet opening of the air cover while being rotated. .