JPWO2019156153A1 - Liquid material discharge device - Google Patents

Abstract

The liquid material discharge device according to the embodiment of the present invention has high durability and enables easy repair by module replacement even if it is broken, and supplies the liquid material to be discharged under pressure. A valve seat 46 provided in a liquid material storage space 120 as a flow path, a needle 4 forming a needle valve between the valve seat 46, and an engine 5 for driving the needle 4 are arranged in series on one axis. The engine 5 is an electromagnetic solenoid 50, and the needle 4 driven by the solenoid solenoid 50 is provided with a syringe 2 or 36 for supplying the liquid material to the liquid material storage space 120 which is a flow path while being held by the valve body 91. The opening / closing stroke of the needle 4 is adjusted by moving the surface of the electromagnetic solenoid 50 that attracts the armature 8 toward or away from the armature 8.

Description

According to the present invention, for example, when an electronic component or the like is mounted on a circuit board, a liquid material discharge device (also simply referred to as a valve) for accurately discharging a small amount of a liquid material such as an adhesive or a silicone resin liquid onto the circuit board. ).

As a liquid material discharge device for accurately discharging a small amount of liquid material such as an adhesive or a silicone resin liquid, the liquid material filled in a small container called a syringe is put under pressure and the valve mechanism is very large. Conventionally, it has been known that a silicon resin is opened and closed for a short period of time to discharge the material only during that period. As a discharge device of this type, a type in which an engine having a valve mechanism and a syringe are arranged in parallel is the mainstream. In the case of this parallel type discharge device, a piezoelectric actuator incorporating a pneumatic method or an amplification mechanism is generally used as a drive source (Patent Document 1).

Japanese Unexamined Patent Publication No. 2016-215198

However, in the piezo actuator, the piezo element is fragile, and if it breaks, it is difficult for the user to repair it, and it is fatal for the user to replace each valve or repair it on the manufacturer side. There are drawbacks. Further, although the feature of the piezo element is that the driving speed can be increased, continuous use causes the piezo element to reach the Curie temperature and damage the piezo element, so that the piezo element cannot be used continuously at high speed.

An object of the present invention is to provide a discharge device having high durability and which can be easily repaired by replacing a module even if it is broken.

A liquid material discharge device that achieves such an object includes a valve seat provided in a flow path for supplying a liquid material to be discharged under pressure, a needle forming a needle valve between the valve seats, and the needle. The engine that drives the needle is arranged in series on one axis and held by the valve body, while the valve is provided with a syringe that supplies a liquid substance to the flow path. The engine is an electromagnetic solenoid, and the needle is driven by the solenoid. Has an armature, and the opening / closing stroke of the needle is adjusted by causing the surface of the electromagnetic solenoid that attracts the armature to approach or separate from the armature.

Here, the engine is composed of a solenoid module and an engine cover, and the rotation of the engine cover itself is converted into a linear motion by a feed screw mechanism formed between the engine bracket that supports the engine of the valve body and the engine cover. It is preferable that the stroke is adjusted by moving the entire engine closer to or further from the armature.

The engine is composed of a solenoid module and an engine cover. The engine cover is fixed to the engine bracket that supports the engine of the valve body, and one of the parts that drives the armature of the solenoid module connected to the engine cover. It is preferable that the stroke can be adjusted by making the part or the whole structure movable in the axial direction.

Further, the solenoid module is composed of a solenoid body fixed to the engine cover and a solenoid core arranged in the center of the solenoid body and slidable toward the armature, and the armature is moved up and down by moving the solenoid core up and down. It is preferable that the structure is such that the surface to be sucked is raised and lowered to adjust the stroke.

Further, it is preferable that the solenoid module has a structure in which the surface that attracts the armature is raised and lowered to adjust the stroke by integrally moving up and down in conjunction with the solenoid core.

Further, between the needle that penetrates the valve body and moves forward and backward toward the valve seat assembly and the valve body, the U packing that is in sliding contact with the needle and the O that is filled between the U packing and the housing of the valve body. It is preferable to have a seal composed of a ring.

Further, the above-mentioned liquid substance discharge device has a cooling gas introduction port for supplying cooling gas to be introduced from the outside and cooling for discharging the cooling gas to the outside on the inner peripheral surface which penetrates and accommodates the engine support portion of the engine bracket. The gas discharge port is provided so as to be axially separated at a wider interval than the amount of axial movement when adjusting the stroke of the engine support portion, and the cooling gas introduction port and the cooling gas introduction port are separated and sealed in the axial direction. A ring is provided, and a gas flow path is formed in the engine support that simultaneously communicates with the gas inlet and gas outlet to allow the cooling gas to pass through the space around the solenoid, and the engine support is rotated and fed. It is preferable that the gas flow path of the engine support portion is always in communication with the gas inlet and the gas outlet even in the given state.

Further, in the liquid substance discharging device described above, it is preferable that the armature is slidably held by the armature protective cover fitted on the outer peripheral surface of the engine.

Further, in the above-mentioned liquid material discharge device, the engine and the syringe are arranged side by side in parallel, and the syringe and the liquid material storage space of the valve box constituting the needle valve are connected by a flow path of the fluid body. Is preferable.

In addition, the syringe contains the hot melt adhesive, the fluid body has a built-in temperature control unit, and the valve box and syringe are heated by the temperature control unit built into the fluid body to make it liquid. It is preferable that a hot melt adhesive is supplied.

Further, in the above-mentioned liquid material discharging device, it is preferable that the syringe is directly connected to the valve box at right angles or obliquely to the valve box, and the liquid material is directly supplied from the syringe to the liquid material storage space of the valve box. ..

According to the liquid substance discharge device of the present invention, since the engine is an electromagnetic solenoid having no moving parts, it has high durability and can be easily repaired by replacing the module even if it is broken. Moreover, since the structure is simple, it can be repaired by the user.

In addition, the opening and closing stroke of the needle is adjusted by moving the surface of the electromagnetic solenoid that attracts the armature toward the armature, so the gap between the solenoid suction surface and the armature is proportional to the stroke adjustment. By shortening the length, the armature is attracted by a stronger excitation force, so that the valve opening / closing operation becomes faster and a minute amount of coating becomes possible. Moreover, since the armature is attracted to the solenoid and reaches the stroke end, the suction force of the solenoid can be fully utilized, and the responsiveness is not impaired regardless of the amount of stroke adjustment. Furthermore, the shorter the stroke, the shorter the gap between the armature in the standby position and the suction surface of the solenoid, the suction force of the solenoid becomes stronger at an accelerating rate, the response speed becomes faster, and the cycle becomes higher. It is possible to realize a discharge device capable of discharging a very small amount of water.

It is a perspective view which shows the 1st Embodiment of the liquid matter discharge device which concerns on this invention. It is a perspective view seen from the bottom of the discharge device. It is a central vertical sectional view of the discharge device. It is an enlarged sectional view of the main part of the discharge device. It is an enlarged sectional view of the engine part of the discharge device. It is an enlarged sectional view of the nozzle mechanism part of the discharge device. It is a bottom perspective view which shows one Embodiment of an engine bracket. It is a plan perspective view which shows one Embodiment of an engine cover. It is a bottom perspective view of an engine cover. It is a plan perspective view which shows one Embodiment of a coil housing. It is a plan perspective view which shows one Embodiment of a fluid body. It is an enlarged sectional view of the engine part which shows the 2nd Embodiment of the discharge device. It is an external perspective view which shows the 3rd Embodiment of the discharge device. It is a partial vertical sectional view of the discharge device. It is a vertical sectional view which shows the 4th Embodiment of the discharge device.

Hereinafter, the configuration of the liquid material discharge device (hereinafter, referred to as a valve) according to the present invention will be described in detail based on the embodiments shown in the drawings. The valve is generally used to discharge a liquid material in the vertical direction (downward), but depending on the shape of the work (object to be coated), the valve is discharged diagonally downward by changing the mounting angle. Sometimes. However, in the present specification, an example of discharging downward will be mainly described. Therefore, in the present specification, unless otherwise specified, the vertical direction or the longitudinal direction is the direction in which the needle for opening and closing the valve moves (axial direction), and is in the longitudinal direction regardless of the actual orientation of the valve. When moving, it is called ascending or descending or ascending or descending.

1 to 11 show a first embodiment of the valve according to the present invention. In the valve 90 according to this embodiment, the engine 5 that drives the needle 4 to open and close the needle valve and the syringe 2 are attached to the valve body 91 in parallel, and the needle 4 and the valve seat assembly (valve seat). , Hereinafter referred to as valve assay 3), a needle valve is provided under the engine 5, the needle valve and the syringe 2 are connected by a fluid body 92, and the liquid material in the syringe 2 is a needle. The structure is such that it is supplied toward the valve. The valve body 91 includes a syringe bracket 94 for holding the syringe 2, an engine bracket 93 for supporting the engine 5, and a fluid body 92 for supplying the liquid material to be discharged from the syringe 2 to the valve assay 3. Has been done. According to this valve 90, the liquid material in the syringe 2 is supplied to the space 120 for storing the liquid material via the fluid body 92 by applying the pressure of the working gas into the syringe 2, for example, and the needle is 4 is pulled up (needle valve is opened) by the drive of the engine 5, and is discharged from the valve assay 3.

As shown in FIG. 2, the fluid body 92 is fixed to the base portion of the valve body 91 with a fastening screw 112 and is integrated with the valve body 91. As shown in FIGS. 3, 4, and 11, for example, the fluid body 92 is a square bar-shaped block that protrudes from directly below the engine 5 to directly below the syringe 2, has a flow path 123, and has a flow path. A luer 102 as a syringe connection adapter is provided on the distal end side of the path 123, and a valve assay 3 is provided on the proximal end side of the flow path 123. In the valve assay 3, the needle 4 is arranged so as to cross the flow path 123 of the fluid body 92, and the needle 4 is vertically oriented under sealing by the U packing 110, the O-ring 105, and the seal retainer 106 that holds them down. It is housed so that it can slide on. The U packing 110 that comes into contact with the needle 4 is preferably made of engineering plastic such as fluororesin, which has excellent chemical resistance and heat resistance. However, since engineering plastic is a relatively hard material, it is strong against axial sliding, but weak against radial axial shake, easily develops habits, and cannot maintain the sealing property with the needle 4. May cause leaks. Moreover, since the sealing property on the outer peripheral edge side of the U packing 110 depends on the processing accuracy on the housing (concave portion 118 of the fluid body 92 in this embodiment) side in which the packing is housed, there is a risk of leakage. Therefore, the U packing 110 is fitted around the needle 4, and the O-ring 105 is further fitted between the U packing 110 and the recess (housing) 118 of the fluid body 92 around the U packing 110 to fit the U packing 110 and the O-ring. It is designed to be sealed in combination with 105. As a result, the O-ring 105 can absorb the shaft shake of the U packing 110 to form a seal structure that is less likely to cause leakage.

Reference numeral 131 in the drawing is a blind screw plug that closes the flow path 123 after processing, and 132 is a screw hole for screwing the luer 102. Here, when the resin lure 102 is adopted, when the syringe 2 is replaced, the lure 102 may rotate together with the syringe 2 and come off from the screw hole 132 of the fluid body 92. Therefore, it is preferable to provide a bifurcated lure rotation prevention claw 134 that sandwiches two opposite sides of the hexagonal head of the resin lure 102 to prevent rotation, and prevents the resin lure 102 from rotating. The bifurcated claw tool 134 has a hole through which the blind screw plug 131 passes, and when the resin luer 102 is screwed into the screw hole 132 and then the flow path 123 is closed with the blind screw plug 131, the fluid body 92 It is attached to.

Further, the fluid body 92 and the valve body 91 accommodate the base end portion of the fluid body 92 in a recess 116 provided on the bottom surface of the base portion of the valve body 91, and the valve body 91 is accommodated by a fastening screw 112. Is connected to. The fastening screw 112 passes through the through hole 115 of the fluid body 92 and is screwed into the screw hole (not shown) on the bottom surface of the valve body 91 to fasten the fluid body 92 and the valve body 91. Further, a notch 121 for passing the needle 4 is provided above the recess 116 of the base portion of the valve body 91. The notch 121 may be a hole in some cases. The valve assay 3 and the needle 4 mounted on the center of the engine 5 and the fluid body 92 are provided so as to be arranged in series on one axis.

The needle 4 is inserted into the liquid storage space 120 of the fluid body 92 through the seal retainer 106, for example, as shown in FIG. 6, and the conical portion at the tip is fitted to the valve seat 46 of the valve assay 3. The portion near the armature 8 is slidably held by the U packing 110, the O-ring 105, and the seal retainer 106. The valve assay 3 is not limited to a specific structure, and may be a luer lock (screwed) type or a luer through (non-screwed) type. For example, in the present embodiment, the valve assay 3 is fluid. A luer lock (screw-in) type that is fixed to the fluid body 92 by screwing the screw portion of the valve retainer 47 that holds the valve seat 46 into the screw hole 119 of the body 92 is adopted.

The needle 4 is provided with an armature 8 for facilitating driving by the magnetic attraction force of the solenoid module 125. For example, as shown in FIG. 6, a disk-shaped armature 8 is provided at the rear end of the needle 4. In the case of the present embodiment, the needle 4 and the armature 8 are integrated by screw fastening, but the present invention is not particularly limited, and the needle 4 and the armature 8 may be connected by other fixing means such as welding, or may be integrated. It may be a molded product. When the armature 8 is annealed to remove the residual magnetism of the armature 8, the armature 8 becomes soft. Therefore, in the case of the metal pusher 55, a pad 122 made of a hard material is embedded in the central portion where the pusher 55 abuts. I try to improve the wear resistance.

In the case of the present embodiment, the engine 5 is composed of, for example, a solenoid module 125 and an engine cover 95 as shown in FIG. 5, and is supported so as to be able to move up and down with respect to the engine bracket 93. The solenoid module 125 includes a coil bobbin 51, a coil (that is, a solenoid) 50 wound around the coil bobbin 51, a solenoid core (iron core) 52 arranged at the center of the coil bobbin 51, and a coil housing 53 covering these. It is composed of an insulating plate 54 that closes the bottom opening of the coil housing 53 and covers the periphery of the solenoid core 52. The solenoid module 125 is integrated with the engine cover 95 by connecting the coil housing 53 to the bottom of the engine cover 95 with fastening screws, for example, four screws (not shown). The solenoid module 125 and the engine cover 95 are provided so as to be fitted to each other by providing irregularities on the surfaces to be abutted with each other. For example, as shown in FIG. 10, a cylindrical convex portion 89 is formed around a central hole 79 in the center of the top surface of the coil housing 53 of the solenoid module 125, while a bottom surface of the engine cover 95 is formed as shown in FIG. A recess 88 is formed at the entrance portion of the central hole 66 at the center of the coil housing 53, and the convex portion 89 of the coil housing 53 is fitted. Then, the upper half of the solenoid core 52 is housed in the center hole 66 of the engine cover 95 via the center hole 79.

In the case of the present embodiment, the solenoid core 52 is fixed to the coil bobbin 51 and the coil housing 53, and the pusher 55 that constantly contacts the armature 8 and pushes the sucked armature 8 back to the original position, and the pusher 55. It incorporates an urging mechanism, for example, a compression coil spring 56, which constantly urges a force that pushes the armature 8 back to the standby position via the armature. The urging mechanism 56 is not limited to the above-mentioned spring, but can utilize the repulsive force of a pair or more magnets (not shown) that repel each other, and a resin layer having a low friction coefficient and low wear resistance such as polytetrafluoroethylene. Dust generation or the like may be prevented by covering the outside of the spring 56 with a sheath tube or the like having the above.

The armature 8 itself is preferably made of a metal suitable for magnetic adsorption. For this reason, for example, electromagnetic soft iron or magnetic soft iron (so-called pure iron) is adopted for the armature 8 in order to facilitate magnetic attraction to the solenoid. Therefore, if the solenoid repeatedly collides with the metal portion at high speed, it may be worn. Therefore, it is preferable to provide a cover of a resin material on the surface of the solenoid module 125 around the solenoid core 52 facing the armature 8 to avoid direct collision between metals and reduce the wear of the armature 8. For example, in the present embodiment, an annular resin plate (hereinafter referred to as an insulating plate 54) covering an annular surface between the coil housing 53 and the solenoid core 52 faces the armature 8 around the solenoid core 52. The armature 8 is provided so as to be fitted to the surface and the lower end surface (so-called suction surface) of the solenoid core 52 facing the armature 8 is at least flush with the surrounding insulating plate 54, more preferably slightly recessed. The structure is such that when it is adsorbed, it collides with or contacts only the insulating plate 54. Here, as the resin constituting the insulating plate 54, for example, mechanical such as PEEK resin (polyetheretherketone), aromatic polyetherketone, POM resin (polyacetal), MC nylon (registered trademark of Nippon Polypenco), etc. A resin material having excellent strength, abrasion resistance, insulating property, slidability and the like is preferable. In the present embodiment, the insulating plate 54 is provided so as to be fixed by being threaded on the peripheral edge, for example, and screwed with the female thread 78 cut on the inner surface of the opening peripheral edge of the coil housing 53. The method is not particularly limited to this, and for example, it may be fixed by adhesion or press fitting. Further, the pusher 55 may also be made of resin. In this case, the armature 8 is prevented from being worn and the risk of dust generation is reduced.

Here, when a solenoid is used as an actuator, there is a correlation between the responsiveness of the valve and the exciting force, and when the exciting force has a constant output, it depends on the positional relationship between the solenoid and the armature, and if suction can be performed from a closer distance. The armature rises more quickly, and at the same time it is possible to install a stronger spring, and the repulsive force of the spring after the excitation is completed becomes stronger, enabling a jet of a more viscous fluid. At the same time, since the valve operation completes one cycle of opening and closing operation in a shorter time, it is possible to apply a smaller amount.

However, the gap between the solenoid and the armature in the standby position remains constant regardless of the needle opening / closing stroke amount and remains at a wide maximum gap value to enable various applications that differ from user to user. When fixed to, it is difficult to suck the armature from a closer distance and raise it more quickly. That is, since the attractive force of the armature due to the excitation is in a positional relationship with a gap of the maximum gap value constantly regardless of the actual stroke, the magnetic attractive force acting on the armature is attenuated. For this reason, there is a problem that it is not easy to further improve the responsiveness and discharge a smaller amount of liquid matter while keeping the exciting magnetic force at a constant output.

In addition, the attractive force due to the magnetic force becomes maximum immediately before adsorption, and the closer it is, the stronger the attractive force accelerates. However, if the armature is abutted against the gap stroke adjustment rod and the movement is stopped before the responsiveness increases at an accelerating rate, the smaller the stroke, the higher the solenoid suction surface and the gap stroke adjustment rod. Since the gap between the armature and the armature that is regulated is opened and the attractive force is attenuated, it cannot be attracted by a strong exciting force. That is, there is a problem that the suction force of the solenoid is not fully utilized.

Therefore, in the case of the present embodiment, the valve stroke adjusting mechanism is supposed to adjust the opening / closing stroke of the needle by moving the surface of the solenoid module 125 that attracts the armature 8 toward the armature 8. .. For example, as shown in FIGS. 7 and 8, the engine bracket 93 has, for example, an annular engine support portion 96 that penetrates and holds the engine cover 95, and is formed on the inner peripheral surface of the engine support portion 96. , A female screw 124 that is screwed with the male screw 114 of the engine cover 95 is provided, and by screwing the male screw 114 at the neck of the engine cover 95, a feed screw mechanism that is rotatably supported and movable in the axial direction is provided. Is configured. The structure is such that the engine cover 95 and thus the solenoid module 125 are moved up and down by twisting the engine cover 95 itself. In this case, for example, as shown in FIG. 1, a stroke is provided by inserting a scale 11 corresponding to the rotation of the feed screw mechanism and the amount of axial movement on the engine cover 95 side and inserting the baseline 12 on the engine support portion 96 side. The amount can be displayed.

That is, in the present embodiment, the origin is the position when the needle valve is closed and the gap between the solenoid suction surface, for example, the insulating plate 54 and the armature 8 becomes 0, and the amount of rise / movement from that position is set as the origin. The amount is the stroke amount. Therefore, by lifting the engine cover 95 from the position where the insulating plate 54 is in contact with the armature 8, the gap between the suction surface of the engine 5 built in the engine cover 95 and the armature 8, that is, the valve stroke is accurately set. be able to.

In the present embodiment, the engine bracket 93 is configured as an independent separate part separated from the valve body 91, and is attached to the valve body 91 with a slight gap by, for example, a knock pin and a fastening screw 113 (not shown). Has been done. As a result, the engine bracket 93 has a mounting structure in which the influence of heat received from the temperature control cartridge heater (hereinafter referred to as the temperature control heater 48) built in the valve body 91 is alleviated. Since the liquid material discharge device according to the present embodiment mainly discharges the liquid adhesive at room temperature, the temperature control heater 48 at least discharges the valve assay 3 by intensively heating the valve assay 3. It is provided to heat the liquid material immediately before. The temperature control control for the liquid material is controlled within a range that does not cause heat damage to the liquid material by the action of the temperature sensor 49.

Between the engine bracket 93 and the engine cover 95, an inert gas such as compressed air or nitrogen gas (hereinafter, collectively referred to as cooling gas) is supplied around the coil 50 to cool the engine. The system is configured. In the case of the present embodiment, this engine cooling system includes a gas flow path in the engine bracket 93 and a gas flow path in the engine 5.

The gas flow path in the engine bracket 93 is a gas supply connection opened on the inner peripheral surface of the circular through hole 58 of the engine support portion 96 through which the engine cover 95 is penetrated, which faces the peripheral surface of the engine cover 95. The port 57 and the connection port 59 for gas discharge are communicated with each other between the gas joint 61 for gas introduction and the gas joint 62 for gas discharge provided in the engine bracket 93. The connection ports 57 and 59 are provided at the bottoms of the two annular grooves 97 and 98 formed on the inner peripheral surface of the through hole 58 of the engine support portion 96, and one annular groove 97 is for gas supply and the other. The annular groove 98 of the above is used for gas discharge. The connection ports 57 and 59 are constantly communicated with the introduction opening 103 and the discharge opening 104 of the gas flow path of the engine cover 95 via the annular grooves 97 and 98. The annular grooves 97 and 98 are provided at positions that substantially overlap with the openings 103 and 104 of the gas flow paths 67 and 69 of the engine cover 95, one of which is for supplying gas and the other of which is for discharging gas. Used for use. These annular grooves 97 and 98 are composed of a supply gas flow path and a discharge gas flow path partitioned between the three O-rings 99, 100 and 101 fitted on the outer peripheral surface of the engine cover 95. ing. Therefore, even when the engine cover 95 is moved in the axial direction by the valve stroke adjusting mechanism, the gas flow path on the engine bracket 93 side and the gas flow path in the engine cover 95 are always connected within the range of movement during the stroke adjustment. It is said to be a structure. Reference numerals 128, 129, and 130 in the drawing are annular grooves for O-rings.

On the other hand, the gas flow path on the engine 5 side includes the space 63 around the solenoid 50 in the coil housing 53, and the introduction opening 103 connected to the annular grooves 97 and 98 on the engine bracket 93 side and the discharge. The gas in the engine bracket 93 from the discharge opening 104 is provided with the opening 104, and the cooling gas supplied from the engine bracket 93 side through the introduction opening 103 is passed through the space 63 around the solenoid 50. It is discharged via the flow path. Normally, the cooling gas is released into the atmosphere in a place where there is no risk of adversely affecting the liquid substance discharge / coating work, for example, a place away from the work site, but in some cases, it is returned to the gas joint 61 again after heat removal and circulated. You may let it. The introduction opening 103 and the discharge opening 104 are opened at positions where they can be matched with the annular grooves 97 or 98 on the inner peripheral surface of the engine support portion 96, respectively.

Further, on the bottom surface of the engine cover 95, that is, the surface in contact with the top surface of the coil housing 53, as shown in FIG. 9, the gas flow path 67 connected to the introduction opening 103 of the engine cover 95 and the bottom surface of the engine cover A recess 68 that surrounds the outlet of the passage 67, a gas flow path 69 that connects to the discharge opening 104, a hole 70 for passing a power cable, and a fastening screw that connects the engine cover 95 and the coil housing 53 (not shown). There are four through holes 71 through which the (omitted) is passed from the top side of the engine cover 95. Further, on the bottom surface of the engine cover 95, a recess is formed between the outer peripheral edge portion 64 surrounding the outer peripheral edge of the flange portion 126 and the land portion 65, and the top surface of the coil housing 53, the outer peripheral edge portion 64, and the land portion 65 are formed. A space 74 is formed between the bottom surface of the engine cover 95 and the top surface of the coil housing 53 to allow the cooling gas discharged from the inside of the coil housing 53 to pass through. A recess 68 is formed in the land portion 65 so as to surround the gas flow path 67 connected to the introduction opening 103.

On the other hand, as shown in FIG. 10, the top surface of the coil housing 53 is formed by four screw holes 75 for screwing four fastening screws (not shown) and recesses 68 of the engine cover 95. A space (in other words, a space connected to the gas flow path 69) formed between the air supply port 72 and the through hole 77 connected to the flow path and the engine cover 95 outside the coil housing 53 for the cooling gas in the coil housing 53. An exhaust port 73 for discharging to the concave portion) 74 is opened. Further, O-rings 80 and 81 are interposed between the engine cover 95 and the coil housing 53 to form an airtight structure between the engine cover 95 and the coil housing 53.

Therefore, the cooling gas supplied from the gas flow path 67 connected to the introduction opening 103 of the engine cover 95 is introduced from the air supply port 72 through the recess 68 into the space 63 around the solenoid 50 to cool the solenoid 50. After that, the gas is returned to the gas flow path 69, that is, the gas flow path of the engine bracket 93 via the exhaust port 73 and the recess 74. Then, the cooling gas flows through the space (recess) 74 between the engine cover 95 and the coil housing 53, so that the top surface portion of the coil housing 53 is cooled and the cooling effect of the solenoid module 125 is further enhanced. In the case of this embodiment, the power cable 60 that supplies power to the solenoid 50 is passed through the through hole 77 of the coil housing 53. Further, although not shown, the coil housing 53 is provided with a fixing protrusion 133 on the surface of the coil bobbin 51 facing the ceiling, and is fitted into the hole 76 formed in the ceiling of the coil housing 53 to form the coil housing 53. It is fixed.

A retainer 108 that functions as a double nut is screwed into a portion of the male screw 114 of the engine cover 95 that is exposed above the engine support portion 96. The retainer 108 is screwed onto the upper part of the male screw 114 penetrating the circular space (referred to as the through hole 58) accommodating the engine cover 95 of the engine support portion 96, and is tightened after the valve stroke is adjusted. Be done. The outer peripheral surface of the retainer 108 is knurled, but the present invention is not particularly limited to this.

Further, in the space inside the male screw 114 of the engine cover 95, a cover cap 87 for fixing the power cable 60 and making the central hole 66 for accommodating the solenoid core a waterproof structure is fitted, and a connecting pin (not shown) is fitted. It is fixed to the engine cover 95 by such means. A power cable 60 for supplying power to the solenoid 50 is passed through the cover cap 87. It should be noted that not all of the O-rings in the drawing are described with reference numerals, and it is possible that a sealing means such as an O-ring is provided between the members of the portion where the airtight structure is required. Needless to say.

In the present embodiment, the armature 8 is slidably held by the armature protective cover 109 fitted to the outer peripheral surface of the coil housing 53. The armature protective cover 109 is composed of a cylinder having an inner diameter larger than the outer diameter of the coil housing 53 so as to be fitted in a gap with respect to the coil housing 53, and is a base portion to which the fluid body 92 of the valve body 91 is attached. The position is maintained by the lower end edge abutting the L-shaped corner portion of the boundary between the armature and the column portion supporting the engine bracket 93. That is, the armature protection cover 109 is not fixed to the valve body 91, but is held in the coil housing 53 so as to be fixed at a position where it comes into contact with the valve body 91 due to its own weight drop. The armature protective cover 109 of the present embodiment is provided, for example, by being formed of a transparent sliding resin so that the state of the armature 8 and the presence or absence of a gap can be visually recognized from the outside, but the present invention is particularly limited. It may be made of an opaque slidable resin instead of the armature.

The syringe 2 is held by the syringe bracket 94 and the lure 102, and is installed in parallel with the engine 5 which is supported by the engine bracket 93 so as to be able to move up and down. In the case of the present embodiment, the syringe 2 is connected to the flow path of the fluid body 92 by fitting the luer 102 into the screw hole type tip opening, and is connected to the flow path of the fluid body 92 via the adapter 107 covered with the upper end opening. It is provided so that the liquid material is supplied toward the needle valve by the pressure of the working gas supplied from the outside. The syringe bracket 94 has a substantially annular shape as shown in FIGS. 1 and 2, and is fastened to and fixed to the engine bracket 93 with screws 111. A screw hole 127 for screwing the screw 111 is provided on the engine bracket 93 side.

According to the valve 90 of the present embodiment configured as described above, the syringe 2 is incorporated into the liquid material supply flow path of the valve body 91 simply by passing the syringe bracket 94 and screwing the syringe 2 into the luer 102. Further, the opening / closing stroke amount of the needle 4 corresponding to the amount of the liquid material to be discharged is adjusted as necessary, and the discharge time, in other words, the excitation time of the solenoid is set by a control device (not shown). .. Then, a working gas having a pressure suitable for discharge is applied to the liquid material in the syringe 2 to prepare for the discharge / coating work of the liquid material. In that state, by a control device (not shown), the armature 8 is sucked by the excitation of the engine solenoid 5 and the needle 4 is lifted to open the nozzle, and only while the needle 4 is lifted, the inside of the syringe 2 is opened. The liquid material is discharged via the flow path 123 of the fluid body 92.

Here, the valve stroke adjustment is performed by, for example, picking and rotating the coil housing 53 in a state where the retainer 108 is loosened. That is, the solenoid module 125 is rotated so as to be twisted as a whole, converted into a linear motion by the feed screw mechanism between the valve body 91 and the engine bracket 93, and is moved in the axial direction, and the solenoid module 125 comes into contact with the armature 8. It is performed with the time point as 0 point. Since the needle 4 is a relatively short and thick rod-shaped object that penetrates in the direction across the liquid material supply flow path, there is no room for bending extremely short as compared with the case where the needle 4 penetrates the syringe vertically. Therefore, it is possible to accurately obtain the 0 point (origin). Therefore, the coil housing 53 is rotated by a desired amount based on the zero point to raise the engine 5 while rotating it as a whole, and the gap between the engine 5 and the armature 8 (in other words, the opening degree of the needle 4 valve). Stroke) is set accurately. Moreover, since there is no room for the needle 4 to bend, there is no delay in the discharge timing that the valve does not open until the bent needle 4 is restored.

Further, since the opening / closing stroke amount of the needle 4 is adjusted by moving the suction surface of the solenoid closer to or away from the armature 8, the gap between the solenoid suction surface and the armature 8 at the start of armature suction also fluctuates. Will be done. That is, the smaller the stroke amount of the needle 4, the smaller the gap between the magnetic attraction surface and the armature 8. As a result, the suction force of the engine 5 at the time of discharging a small amount becomes stronger at an accelerating rate, and the response speed also becomes faster at an accelerating rate. Moreover, since the armature 8 reaches the stroke end when the armature 8 collides with the suction surface of the engine 5 or the insulating plate 54 substantially equal to the suction surface, the suction force of the engine 5 can be fully utilized and the responsiveness is further enhanced.

Therefore, it is possible to realize a discharge device capable of discharging a very small amount of liquid material in a high cycle. Since the stroke is adjusted by moving the engine itself or a part of the engine, the structure of the movable part for stroke adjustment is not complicated, and a large-scale mechanism is not required on the valve body side, so the device configuration Has the advantage that it can be made compact as a whole.

The liquid substance discharging device according to the above-described embodiment mainly discharges a liquid adhesive at room temperature, but is not particularly limited to this, and is an adhesive that becomes solid at room temperature, that is, a hot melt adhesive. Needless to say, it can also be used for discharging (also called hot bond).

13 to 14 show an embodiment of a discharge device for a hot melt adhesive. The hot melt adhesive discharge device according to the present embodiment has a different structure regarding heating and supply of the adhesive from the discharge device according to the embodiments shown in FIGS. 1 to 12, and the engine 5 and the valve body 91 have a different structure. The syringe bracket 94, syringe 2, fluid body 92 and temperature control unit (temperature control heater 48 and temperature sensor 49) are removed from the valve body 91, and the fluid body 14 containing the temperature control unit 17 is used. By attaching a syringe 36 that receives the heat of the temperature control unit 17, it is possible to change the liquid material to be discharged. The members common to the discharge devices shown in FIGS. 1 to 12 are designated by the same reference numerals, and detailed description thereof will be omitted.

The fluid body 14 comprises a valve box 13 that surrounds the needle 4 and forms a liquid material storage space 120 that temporarily stores the liquid hot melt adhesive, and a hot melt adhesive supplied from the syringe 36. A flow path 15 that can be supplied to the valve box 13 and a temperature control unit 17 are provided so that the hot melt adhesive in the heat-melted syringe 36 is supplied to the liquid material storage space 120 via the flow path 15. It is provided in. The temperature control unit 17 is arranged along the flow path 15 and has a structure in which the entire fluid body 14 including the flow path 15 and the valve box 13 is heated to a temperature suitable for discharging the hot melt adhesive. It is said that.

The valve box 13 has, for example, a substantially cylindrical shape, and a flange portion 18 is formed at one end, for example, on the lower end side, and the flange portion 18 is screwed to the fluid body 14 to be integrated with the fluid body 14. ing. A valve assay 3 composed of a valve seat 46 and a valve retainer 47 is fitted in the center of the flange portion 18, and a U-shaped packing 19 and a backup ring 20 that allow the needle 4 to slide are fitted at opposite ends. And are provided. Further, the needle support bracket 22 is fixed to the recess 116 of the valve body 91 by, for example, screwing, and the upper side of the needle 4, that is, the portion near the armature is slidably supported. Therefore, the needle 4 is slidably supported in the axial direction by the needle support bracket 22 and the U-shaped packing 19 of the valve box 13.

As the hot melt adhesive, thermoplastic plastics such as ethylene vinyl acetate (EVA), polyolefin, synthetic rubber, polyamide, polyester and polyurethane are mainly used. Usually, the hot melt adhesive is housed in a syringe 36 containing a plunger 26, sealed with a syringe head cap (not shown), and is commercially available. When these hot melt adhesives are heated to, for example, 120 to 200 ° C., the resin melts and becomes liquid. Therefore, a method is adopted in which the plunger 26 is driven by air pressure while being heated from the outside of the syringe 36 to melt the hot melt adhesive in the syringe 36 and pumped.

Hot melt adhesives solidify as soon as they cool. Therefore, not only the liquid substance immediately before discharge is heated by heating the valve assay 3 through the fluid body 14 and the valve box 13, but also the syringe 36 itself is heated to heat the hot melt adhesive in the syringe 36. It is necessary to supply while melting. Therefore, the syringe 36 is provided so that the heat of the temperature control unit 17 built in the fluid body 14 is transferred to almost the entire area of the syringe 36. For example, a heat transfer pipe 24 for transferring the heat of the temperature control unit 17 built in the fluid body 14 is arranged around the syringe 36. Reference numeral 41 in the figure is a blind screw stopper.

The heat transfer pipe 24 is made of aluminum or copper, for example, and has excellent thermal conductivity, and functions as a heat source / heat dissipation surface that gives heat to the syringe 36 to heat the hot melt adhesive inside. The heat transfer pipe 24 is fixed to the fluid body 14 via a block for transferring heat of the fluid body 14 (hereinafter, referred to as a heat transfer block 23). The heat transfer pipe 24 is fixed to, for example, the heat transfer block 23 by a screw 29 and is held in parallel with the engine 5. The heat transfer block 23 is a circular block having an outer peripheral surface having an outer diameter substantially the same as the outer diameter of the syringe 36, and is screwed to the fluid body 14. The heat transfer block 23 has, for example, a recess that matches the shape of the tip of a syringe, that is, a recess in which a conical and cylindrical inner peripheral surface is continuous, and the luer 30 is screwed into a central screw hole (lure connection port) 31. It is provided to be fixed with. Therefore, the heat of the cartridge heater 16 of the temperature control unit 17 built in the fluid body 14 is transferred to the heat transfer pipe 24 via the heat transfer block 23, and melts the hot melt adhesive filled in the syringe 36. It is possible to hold it as a liquid material. The inner diameter of the heat transfer pipe 24 and the outer diameter of the syringe 36 are set to, for example, a gap fit state in which they can be taken in and out while being substantially in close contact with each other.

The discharge device of the present embodiment is provided with a syringe 36 behind (the back) of the engine 5 so that an operator does not accidentally touch the syringe 36 to cause burns. It is difficult for workers to work if the heat source is located on the front side. Placing it on the back side (back side) eliminates the risk of burns and makes work easier.

In addition, a protective cover 25 for preventing burns is arranged around the heat transfer pipe 24. The protective cover 25 has a structure that surrounds the heat transfer pipe 24 in a non-contact manner so as to form an air heat insulating layer between the protective cover 25 and the heat transfer pipe 24. In the case of the present embodiment, the protective cover 25 is held by being lightly press-fitted into the hole of the syringe holder 27 screwed to the back side of the valve body 91. The valve of the present embodiment is generally mounted on a robot or the like via a heat-insulating syringe holder 27 fixed to the back side of the valve body 95. Therefore, for example, it is carried out by using a through hole 43 formed in the flange portion 42 of the syringe holder 27 and mounting it on a mounting site such as a robot (not shown) with a fastening screw or the like.

On the other hand, the syringe 36 is preferably made of a resin such as polypropylene that can sufficiently withstand heating at, for example, about 180 ° C. to 200 ° C. The syringe 36 is connected by being screwed into a luer 30 as a syringe adapter screwed into and fixed to the fluid body 14.

Here, the syringe 36 and the heat transfer pipe 23 have a structure that can be attached to the heat transfer pipe 24 with one touch by rotating the lock member 32 fitted with the syringe adapter 34 by half a turn. That is, the syringe adapter 34 includes a lock member 32 having an L-shaped claw that engages with the flange 33 of the heat transfer pipe 24 that protrudes radially outward at 180 ° intervals, and the syringe adapter 34 is provided at the open end of the syringe 36. The lock member 32 is engaged with the heat transfer pipe 24 by rotating the lock member 32 half a turn in the fitted state.

The fluid body 14 has, for example, a fastening screw 112 for fixing the fluid body 92 to a recess 116 provided in the base portion of the valve body 91 and a screw hole (not shown) on the bottom surface of the valve body 91. It is attached by interposing the heat insulating collar 21 by utilizing it. The heat insulating collar 21 is provided so as to block the heat of the temperature control unit 17 built in the fluid body 14 and prevent the nozzle body 91 side from being heated.

According to the hot melt adhesive discharge device configured as described above, the syringe 36 in which the hot melt adhesive is sealed is inserted into the heat transfer pipe 24 and screwed into the heat transfer block 23. It is attached by fitting. The hot melt adhesive sealed in the syringe 36 is heated and melted by the heat from the heat transfer block 23 and the heat transfer pipe 24, which are heated by the heat generated by the temperature control unit 17 of the fluid body 14, and the plunger 26 Under pressure, the fluid is supplied to the liquid material storage space 120 of the valve box 13 via the flow path 15 of the fluid body 14. Then, the needle 4 is driven by the engine 5, and the coating is applied only while the needle valve is open.

Here, the syringe 36 does not necessarily have to be arranged in parallel with the engine 5, and may be arranged in a direction orthogonal to or diagonally intersecting with the valve box 13 in some cases. In other words, as shown in FIG. 15, the syringe 36 is arranged so as to be orthogonal to the valve box 13 and directly connected, and the hot melt adhesive is applied from the syringe 36 to the liquid material storage space 120 of the valve box 13. It may be supplied directly. In this case, since the liquid contact portion of the discharge device can be shortened by omitting the fluid body 14 having the flow path 15 connecting the syringe 36 and the valve box 13, it is caused by carbonization of the hot melt adhesive or the like. Nozzle clogging can be avoided.

That is, when the temperature control heater 16 is provided along the flow path 15 in the fluid body 14 which is a part of the discharge device and is constantly heated, the hot melt adhesive becomes carbide in the flow path 15. May adhere to the wall surface. Then, the carbides may peel off and flow out, causing nozzle clogging. Therefore, in order to reduce the possibility that the hot melt adhesive is carbonized in the flow path, it is desired to shorten the flow path in the device that comes into contact with the hot melt adhesive.

The discharge device for the hot melt adhesive shown in FIG. 15 has, for example, a temperature control block 37 that can accommodate the syringe 36 and is provided with a valve box 13 so that they can be heated to a desired temperature under the engine 5. It is mounted, and the syringe 36 is directly connected to the liquid material storage space 120 of the valve box 13 so as to directly supply the hot melt adhesive to the liquid material storage space 120. The temperature control block 37 incorporates a temperature control unit 17 including a cartridge heater 16 and a temperature sensor (not shown), surrounds the valve box 13 and the syringe 36, and simultaneously holds the valve box 13 and the syringe 36. It is provided so that it can be heated. The temperature control block 37 is preferably formed of a material having excellent heat transfer properties such as die casting of an aluminum alloy, transfers the heat of the temperature control unit 17 to the valve box 13 and the syringe 36, and is sealed in the syringe 36. The hot melt adhesive is heated and melted, and the liquid hot melt adhesive transferred to the liquid material storage space 120 of the valve box 13 is kept warm so as to prevent solidification. Therefore, the hot melt adhesive sealed in the syringe 36 is heated and melted by the cartridge heater 16 and moves by receiving the air pressure of the compressed air supplied through the air joint 35 connected to the syringe adapter 34. It is extruded by the jar 26 and is directly supplied to the liquid material storage space 120 from the luer connection port / screw hole 39 of the peripheral wall portion of the valve box 13 via the luer 38.

Here, the inner diameter of the syringe storage space of the temperature control block 37 and the outer diameter of the syringe 36 are gaps that can be taken in and out while being substantially in close contact with each other, as in the relationship between the heat transfer pipe 23 and the syringe 36 of the above-described embodiment. It is preferable to set the fit state in terms of heat transfer. Further, the space for accommodating the syringe 36 is formed as, for example, a hollow portion forming a columnar contour, and the opening is provided with a member corresponding to the flange 33 of the embodiment of FIGS. 13 and 14, and the syringe adapter 34 is provided. The structure is such that it can be attached to the temperature control block 37 with one touch by rotating the lock member 32 half a turn. Reference numeral 40 in the figure is an O-ring.

According to this discharge device, since the syringe 36 is sealed by the built-in plunger 26, the hot melt adhesive that has been heated and melted does not leak even if it is placed horizontally. Further, since the syringe 36 is disposable, even if carbides are generated inside and remain attached, they are discarded as they are, so that they are unlikely to cause nozzle clogging. Therefore, maintenance becomes easy.

The above-described embodiment is an example of a preferred embodiment of the present invention, but the present invention is not limited to this, and various modifications can be performed without departing from the gist of the present invention. For example, in the above-described embodiment, the stroke is adjusted by rotating the entire engine, that is, the engine cover 95 and the solenoid module 125 connected to each other by a feed screw mechanism configured between the engine bracket 93 and the engine cover 95. However, the structure is not particularly limited to this, and a part or the whole of the part or the whole that drives the armature of the solenoid module 125 is configured to be movable in the axial direction with respect to the engine cover 95 fixed to the engine bracket 93. By doing so, the stroke may be adjustable.

For example, as shown in FIG. 12, the solenoid core 52 of the solenoid module 125 may be movable in the axial direction with respect to the engine cover 95 fixed to the engine bracket 93 so that the position of the suction surface can be changed. .. In the present specification, the portion of the solenoid module 125 excluding the moving part is referred to as a solenoid main body.

The valve stroke adjusting mechanism in this embodiment supports the solenoid core 52 so as to be slidable in the axial direction when an external force is applied to the engine cover 95, while the cover cap 44 fixed to the upper end of the engine cover 95. The stroke adjusting screw 82 is provided so that it can move forward and backward toward the solenoid core 52, and the position of the suction surface of the solenoid module 125 is made variable by directly pushing down the solenoid core 52 with the stroke adjusting screw 82. There is. Since the solenoid core 52 is urged by the reaction force of the compression coil spring 56 that constantly urges the armature 8 to be pushed back to the standby position via the pusher 55, the stroke adjusting screw 82 is urged. It is brought into contact with the bottom surface of the. On the other hand, the stroke adjusting screw 82 is rotatably supported by being screwed into the screw hole of the cover cap 44, and by rotating the adjustment cap 83, the stroke adjusting screw 82 becomes the female screw of the cover cap 44. The rotational motion is converted into a linear motion and moved in the axial direction. Therefore, the solenoid core 52 moves up and down in conjunction with the movement of the stroke adjusting screw 82, and the position of the solenoid core 52, that is, the suction surface of the solenoid is changed to adjust the stroke amount. The stroke adjusting screw 82 is integrated by, for example, screwing the upper mounting screw portion into the screw hole of the adjustment cap 83 and then fixing it with an adhesive, and the main screw portion as the stroke adjusting screw is the cover cap. It is provided so as to enter and exit toward the solenoid core 52 by being screwed into the screw hole of 44. Reference numeral 45 in the drawing is a screw that connects the engine cover 95 and the cover cap 44.

The adjustment cap 83 is preferably provided with positioning means for preventing rotational slack due to vibration of the adjustment cap 83 after stroke adjustment, and is provided so as to prevent fluctuations in the stroke amount. For example, it is configured by combining a large number of holes 86 arranged in an annular shape on the upper surface of the cover cap 44 at a constant pitch and a positioning pin 84 with a knob on the side of the micro-adjustment cap 83 that is recessed into the holes 86. .. Since the positioning pin 84 is constantly pressed toward the upper surface of the cover cap 44 by the urging means, for example, the compression coil spring 85, the micro-adjustment cap 83 is allowed to rotate by picking and pulling up the knob. According to this positioning means, when a desired stroke amount is set by the rotation of the micro-adjustment cap 83, the positioning pin 84 is fitted and fixed to the nearest hole 86 to fix the micro-adjustment cap 83. Fixing to the cover cap 44 is performed. Although not shown, a scale and a baseline indicating the correspondence between the rotation of the micro-adjustment cap 83 and the feed amount of the stroke adjusting screw 82 are provided between the micro-adjustment cap 83 and the cover cap 44. Provided.

In the case of this embodiment, the suction surface (that is, the tip surface) of the solenoid core 52 moves toward or away from the armature 8 by the direct drive of the solenoid core 52 by the stroke adjusting screw 82, whereby the solenoid core The gap between the suction surface of 52 and the armature 8 is adjusted to adjust the stroke.

Further, the stroke may be adjusted by making the solenoid module 125 a structure that can move in the axial direction as a whole. For example, although not shown, if the engine cover 95 and the coil housing 53 are separated from each other, while the solenoid core 52 and the coil housing 53 are fixedly interlocked with each other, the above-mentioned solenoid core 52 is moved up and down. With the same valve stroke adjusting mechanism as above, the entire solenoid module 125 can be raised and lowered with respect to the engine cover 95. Also in this case, the responsiveness is high, and a very small amount of liquid material can be discharged in a high cycle. In the case of this embodiment, for example, the coil housing 53 and the engine cover 95 are sealed with an outer cylinder cover (not shown), while the recess 65 into which the land portion 65 for partitioning the recess 68 and the space 74 enters and exits is provided. By providing and sealing between the peripheral surface of the land portion 65, the gas flow paths on the air supply side and the exhaust side can be separated even if the solenoid module 125 moves up and down, and a structure can be adopted in which the cooling gas does not leak. it can.

Further, in the above-described embodiment, an example in which the syringe 2 filled with a liquid substance in advance is attached to the valve body 91 and used has been mainly described, but the present invention is not particularly limited to this usage example, and the syringe 2 is not particularly limited. Instead, various functional cartridges (not shown) can be installed and used as various types of liquid material supply methods such as a type that directly supplies liquid material from the outside by pumping from a pressure tank and a pump circulation supply method. You can also do it. That is, in the present specification, the syringe is not particularly limited to the one directly filled with the liquid material, and the liquid material is supplied from the outside by pressure feeding from the pressure tank, the syringe external cartridge type, and the pump circulation. It is used as a term to mean a container (collectively referred to as a functional cartridge) used as various types of liquid material supply methods such as a supply method. The case of using these functional cartridges (not shown) is the same as the case of using the illustrated syringe 2. For example, the threaded portion at the tip is screwed into the lure 102 of the fluid body 92 to be attached to the valve body 91. Can be done.

2 Syringe 3 Valve seat assembly 4 Needle 5 Engine 8 Armature 13 Valve box 14 Fluid body 15 Flow path 16 Temperature control cartridge heater (temperature control heater)
17 Temperature control unit 23 Heat transfer block 24 Heat transfer pipe 25 Protective cover 26 Plunger 36 Syringe 46 Valve seat 50 Coil (solenoid)
52 Solenoid core 57 Gas supply connection port 59 Gas discharge connection port 90 Valve 91 Valve body 92 Fluid body 93 Engine bracket
94 Solenoid bracket 95 Engine cover 96 Engine support 97 Ring groove 98 Ring groove 99 O-ring 100 O-ring 101 O-ring 103 Introduction opening 104 Discharge opening 105 O-ring 106 Seal retainer 107 Adapter 108 Retainer 109 Armature protection cover 110 U-packing 114 Male thread of engine cover 124 Female thread of engine support 125 Solenoid module

Claims (11)

A valve seat provided in a flow path for supplying a liquid material to be discharged under pressure, a needle forming a needle valve between the valve seat, and an engine for driving the needle are arranged in series on one axis. While arranging and holding it in the valve body,
A syringe for supplying a liquid material to the flow path is provided.
The engine is an electromagnetic solenoid, and the needle driven by the electromagnetic solenoid has an armature, and the surface of the electromagnetic solenoid that attracts the armature moves toward or away from the armature, so that the needle A liquid substance discharge device for which the opening / closing stroke is adjusted. The engine is composed of a solenoid module and an engine cover, and a feed screw mechanism formed between an engine bracket that supports the engine of the valve body and the engine cover converts the rotation of the engine cover into linear motion. The liquid substance discharging device according to claim 1, further comprising a structure in which the stroke is adjusted by bringing the entire engine closer to or further away from the armature. The engine is composed of a solenoid module and an engine cover, fixes the engine cover to an engine bracket supporting the engine of the valve body, and drives an armature of the solenoid module connected to the engine cover. The liquid material discharge device according to claim 1, wherein the stroke can be adjusted by forming a part or the whole of the portion to be movable in the axial direction. The solenoid module is composed of a solenoid body fixed to the engine cover and a solenoid core arranged in the center of the solenoid body and slidable toward the armature, and by moving the solenoid core up and down. The liquid substance discharging device according to claim 3, wherein the surface that attracts the armature is raised and lowered to adjust the stroke. The liquid substance discharging device according to claim 3, wherein the solenoid module moves up and down integrally with the solenoid core to raise and lower the surface that attracts the armature to adjust the stroke. Between the needle that penetrates the valve body and moves forward and backward toward the valve seat assembly and the valve body, there is a U-packing that is in sliding contact with the needle, and between the U-packing and the housing of the valve body. The liquid material discharge device according to any one of claims 1 to 5, further comprising a seal composed of an O-ring to be filled. On the inner peripheral surface of the engine bracket that penetrates and accommodates the engine support portion, a cooling gas introduction port for supplying cooling gas introduced from the outside and a cooling gas discharge port for discharging cooling gas to the outside are provided on the engine support portion. The engine support portion is provided with an O-ring that is provided at an interval wider in the axial direction than the amount of movement in the axial direction at the time of stroke adjustment, and separates the cooling gas introduction port and the cooling gas introduction port and seals them in the axial direction. A cooling gas flow path is formed in which the cooling gas inlet and the cooling gas discharge port are simultaneously communicated with each other and the cooling gas is passed through the space around the solenoid, and the rotary feed is sent to the engine support portion. The invention according to any one of claims 1 to 6, wherein the cooling gas flow path of the engine support portion is always in communication with the cooling gas introduction port and the cooling gas discharge port even in a given state. Liquid material discharge device. The liquid substance discharging device according to any one of claims 1 to 7, wherein the armature is slidably held by an armature protective cover fitted on an outer peripheral surface of the engine. The engine and the syringe are arranged side by side in parallel, and the syringe and the liquid material storage space of the valve box constituting the needle valve are connected by a flow path of a fluid body. The liquid material discharging device according to any one of claims 1 to 8. The syringe contains a hot melt adhesive, the fluid body contains a temperature control unit, and the valve box and the syringe are heated by the temperature control unit built in the fluid body. The liquid material discharge device according to claim 9, wherein the liquid hot melt adhesive is supplied. According to claim 1, the syringe is directly connected to the valve box at right angles or obliquely to the valve box, and the liquid material is directly supplied from the syringe to the liquid material storage space of the valve box. 8. The liquid material discharge device according to any one of 8.