JP2021166973A - Liquid application gun module - Google Patents

Abstract

To provide a liquid application gun module which enables a pitch to narrow and which can be formed having a multi-structure.SOLUTION: A liquid application gun module comprises a valve body and a manifold 2 including a passage (an operation air supply hole 11) for supplying operation air to the valve body and passages (liquid formulation supply holes 10) for supplying a liquid formulation. On an outer peripheral surface of the valve body 1, operation air introduction holes 20 for driving a piston mechanism incorporated therein are opened and annular circumferential grooves 21, each of which communications with the operation air introduction hole 20, are formed. Further, on the outer peripheral surface of the valve body 1, liquid supply holes 23 for supplying the liquid formulation to a liquid formulation storage part in the valve body 1 are opened and annular circumferential grooves 24, each of which communicates with the liquid supply hole 23, are formed. The operation air introduction hole 20 and the liquid formulation supply holes 23 of the valve body 1 respectively communicate with the operation air supply hole 11 and the liquid formulation supply holes 10 of the manifold 2 through the annular grooves 21, 24.SELECTED DRAWING: Figure 2

Description

The present invention relates to a liquid material coating gun module. More specifically, the present invention relates to an air-driven liquid material coating gun module.

Air-driven valves are known, for example, as hot melt automatic guns for applying adhesives. This hot melt automatic gun consists of a valve body (gun) and a manifold that heats and keeps the valve body warm, and by connecting both parts with bolts, they are brought into contact with each other on their flat surfaces. Then, on the contact surface, the hot melt passage hole and the air passage hole communicate with each other, and an O-ring is attached to the contact surface around both holes.

The conventional valve has a structure in which the operating air and the liquid agent are supplied only from the front surface of the manifold, and the operating air and the liquid agent must be supplied independently for each coating gun module. Therefore, in the case of mulching, they are arranged side by side on the front surface of the manifold and then connected to the manifold (for example, Patent Documents 1 to 3).

Jitsukaisho 61-15802 Special Table No. 08-505810 Special Table 2016-511145

However, in such a structure, when a plurality of liquid material coating gun modules are provided, there is no choice but to mount them side by side on one side of the manifold, or a plurality of liquid material coating gun modules are vertically arranged so as to sandwich the manifold. There is no choice but to line up in a row, and there is a problem that the distance (pitch) between the centers between the valve body and the valve body cannot be set narrow. Further, it is particularly difficult to narrow the pitch when adopting a multi-structure in which the valve bodies are arranged not only horizontally but also vertically and horizontally.

Moreover, since the manifold that regulates the temperature and supplies the liquid to the valve and the valve body are in contact with each other on only one side (back) and connected with bolts, it is difficult to transmit the temperature to the other party, and the temperature efficiency is poor. It has become.

An object of the present invention is to provide a liquid material coating gun module capable of mulching by narrowing the pitch.

The liquid material coating gun module for achieving such an object includes a valve body and a manifold having a flow path for supplying operating air to the valve body and a flow path for supplying the liquid agent, and is provided on the outer peripheral surface of the valve body. Is provided with an operating air introduction hole for driving the built-in piston mechanism, a circumferential annular groove is formed in communication with the operating air introduction hole, and a liquid agent storage portion in the valve body is formed on the outer peripheral surface of the valve body. A liquid agent supply hole for supplying the liquid agent is opened in the valve, and an annular groove in the circumferential direction is formed to communicate with the liquid agent supply hole. The flow path for supplying the operating air of the manifold and the flow path for supplying the liquid agent are communicated with each other.

According to the liquid material coating gun module according to claim 1, the liquid agent and the operating air can be introduced from any position of the annular groove, in other words, from an arbitrary position of 360 °, or if necessary. Since it can be discharged and collected from an arbitrary position of 360 °, the liquid agent supply path formed in the manifold and the operation air supply path can be freely laid out without any restrictions. Moreover, since the liquid agent supply path can be shared, it is possible to drop in and mount a plurality of valve bodies on the manifold of one block, and it is easy to multi-valve the valves.

And, according to the multi-layered liquid material coating gun module, the arrangement interval of the valve body can be narrowed, and the density can be increased (the integration density can be increased). The pitch can be narrowed. That is, since the valves can be arranged in the deep block manifold, the valves can be arranged in the depth direction, that is, in the vertical and horizontal directions, as compared with the conventional valves that can be arranged only in a horizontal row, so that the discharge pitch can be shortened.

It is a perspective view which shows one Embodiment of the single type of the liquid material coating gun module of this invention. It is a central vertical sectional view of the module. It is a central vertical sectional perspective view of the manifold of the same module. It is a front view of the valve body of the module. It is a perspective view seen from the top of the valve body of the module. It is a perspective view seen from the bottom of the valve body of the module. It is a central vertical cross-sectional perspective view of the valve body of the same module. It is a perspective view which shows one Embodiment of the multi-type of the liquid material coating gun module of this invention. It is a central vertical sectional view across a plurality of valve bodies of the multi-type module. It is a perspective view which shows the other embodiment of the multi-type of the liquid material coating gun module of this invention. It is a perspective view seen from the bottom of the multi-type module.

Hereinafter, the configuration of the present invention will be described in detail based on the embodiments shown in the drawings. The liquid material coating gun module, so-called valve, is generally used to discharge the liquid material in the vertical direction (downward), but depending on the shape of the work (object to be coated), the mounting angle is changed and diagonally downward. It may be discharged toward. 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. Further, in the present specification, the lower or the tip means the liquid material discharge port (nozzle) side, and the upper or the rear end means the drive unit side on the opposite side.

1 to 7 show an embodiment of a single type of the liquid material coating gun module of the present invention. The liquid material coating gun module according to this embodiment has a flow path for supplying operating air to the valve body 1 and the valve body 1 (hereinafter referred to as an operating air supply hole 11) and a flow path for supplying a liquid agent (hereinafter referred to as a liquid agent). It is composed of a manifold (also called a valve body) 2 having a supply hole (referred to as a supply hole 10).

The liquid material coating gun module of the present embodiment is a drop-in method in which the valve body 1 is inserted into the hole of the manifold 2 to complete the mounting, and the manifold 2 is provided with a vertical hole into which the valve body 1 is dropped. ing. The vertical holes are a recess (a hole having a step portion) 3 in which an upper drive portion 17 incorporating a piston mechanism of the valve body 1 is housed, and a lower shaft portion (hereinafter, drop-in body 27) in which the valve mechanism is incorporated. It has a substantially straight hole 4 for accommodating the valve body 1), and a notch (so-called relief portion 2d) for exposing the valve body 1 is formed between them. A step portion 4a for hooking and positioning the drop-in body 27 of the valve body 1 is formed in the hole portion 4. Although not shown, the manifold 2 is provided with a heater function as needed. For example, when applying a hot melt adhesive that requires heating as a liquid agent, a heater mechanism consisting of a cartridge heater and a temperature sensor is built in, and when applying to a liquid agent that does not require heating, the heater mechanism is Not built in.

The manifold 2 has, for example, an upper block 2a having a recess 3 for accommodating the drive unit 17 of the valve body 1, a lower block 2b for penetrating and accommodating the drop-in body 27 of the valve body 1, and a side surface shape by connecting these. It is composed of a central bridge portion 2c which is one block forming a U shape. A relief portion 2d formed of a notch that exposes the middle of the valve body 1 (drain hole 44 portion) is formed in the central bridge portion 2c, and the device, for example, is formed on the back side of the valve body 1 without interfering with the valve body 1. The structure is such that a manifold set screw 15 for attaching the manifold 2 can be attached to an adhesive coating device or other equipment / block. That is, the bridge portion 2c at the back of the relief portion 2d is provided with a hole 5 and a seat 6 for passing the manifold set screw 15. Further, on the back surface of the manifold 2, for example, two positioning pin holes 7 are provided at upper and lower positions so that the manifold 2 can be fixed at a predetermined position without inclination. Since the drain hole 44 of the valve body 1 is completely exposed in the relief portion 2d of the central bridge portion 2c, the liquid agent leaked due to the deterioration of the hydraulic pressure portion seal does not enter the air drive portion side and goes to the outside of the valve. By discharging the liquid, it is possible to prevent the liquid agent from entering the piston portion and prevent secondary problems such as valve malfunction.

As shown in FIGS. 2 and 3, the manifold 2 of the present embodiment has an operating air supply hole 11 and a liquid agent supply hole 10. The operation air supply hole 11 is drilled from the back surface of the upper block 2a of the manifold 2, for example, one end is opened in the peripheral wall surface of the recess 3 accommodating the drive unit 17 of the valve body 1, and the opening on the back surface of the manifold 2 ( The screw hole 9) is closed by screwing the blind plug 16. Then, the air for operating air is supplied to the air supply hole 11 by screwing the air supply joint 12 into the female screw 8 drilled from the top surface (top) of the manifold 2 to the air supply hole 11, for example. The structure is such that a tube (not shown) can be attached. The air supply joint 12 is connected to an operating air generator (not shown) via an air tube and a solenoid valve.

Further, the lower block 2b of the manifold 2 is provided with a flow path for supplying a liquid agent (hereinafter, referred to as a liquid agent supply hole 10) for supplying the liquid agent to the liquid agent storage portion in the valve main body 1. It suffices to have at least one liquid agent supply hole 10 for supply only in the case of a liquid agent in which the components are unlikely to settle, but in the case of a liquid agent in which solid components are likely to settle if there is no flow, in the valve. In order to prevent the solid component from settling, it is necessary to form two routes, one for inflow of the liquid agent and the other for recirculation of the liquid agent, to constantly circulate the liquid agent.

For example, when forming the liquid agent supply holes 10 having two routes, one for inflowing the liquid agent and the other for recirculating the liquid agent, the liquid agent supply joint 13 for connecting the tube for supplying the liquid agent to the manifold 2 and the tube for recirculating the liquid agent are provided. The liquid agent recirculation joint 14 for connection is screwed in to form an inlet and an outlet. In the case of the present embodiment, the space inside the tubular intermediate wall (hereinafter referred to as the circulation pipe 31) in which the liquid agent supplied from the inlet divides the liquid agent storage portion in the valve body into an inside and an outside (hereinafter, referred to as a circulation pipe 31). The outer space (hereinafter referred to as the outer flow path 33) passes through the space under the circulation pipe 31 which is guided by the inner flow path 32) and flows down along the needle 26 and is interrupted near the nozzle at the tip. A circulation path is formed so as to flow out of the liquid agent recirculation joint 14 communicating with the outer flow path 33. Of course, when it is not necessary to adopt such a circulation type adhesive supply method, it is sufficient to simply supply the supplied adhesive / liquid under pressure so that it is discharged from the nozzle.

As shown in FIGS. 2 and 3 to 6, for example, the valve body 1 constitutes a needle valve between the needle 26 that moves up and down by air drive and the valve seat 30 at the tip of the drop-in body 27. By pulling up the needle 26 by driving the air piston 18, the liquid agent stored in the space surrounding the needle 26 inside the drop-in body 27 is discharged from the nozzle 29. The drive unit 17 of the valve body 1 adjusts the piston 18 provided at the upper end of the needle 26, the cylinder chamber 19 that houses the piston 18 and constitutes the piston mechanism, and the push-up amount (movement amount) of the piston 18. It has a built-in stroke adjusting screw 39 and a spring 41 whose compression amount is changed by the movement of the screw 39. An operating air introduction hole 20 for introducing operating air is opened on the bottom surface of the cylinder chamber 19 in contact with the bottom surface side of the piston 18.

An operation air introduction hole 20 for driving the built-in piston mechanism is formed on the outer peripheral surface of the valve body 1, and a circumferential annular groove 21 communicating with the operation air introduction hole 20 is formed, and the valve body has an annular groove 21. On the outer peripheral surface, a liquid agent supply hole 23 for supplying the liquid agent to the liquid agent storage portion in the valve body is opened, and a circumferential annular groove 24 communicating with the liquid agent supply hole 23 is formed, and an air introduction hole for operation of the valve body is formed. 20 and the liquid agent supply hole 23 are provided so as to communicate with the operation air supply hole 11 and the liquid agent supply hole 10 of the manifold 2 with the annular grooves 21 and 24 interposed therebetween.

In the case of this embodiment, the operating air introduction hole 20 and the annular groove 21 are arranged at the same position. That is, the annular groove 21 is formed so as to pass over the operating air introduction hole 20 in the circumferential direction. In other words, the operating air introduction hole 20 is formed so as to open at the bottom surface of the annular groove 20 in the circumferential direction dug in the outer peripheral surface of the valve body 1. Further, an operation air seal, for example, an O-ring 22 is arranged vertically (axially) across the annular groove 21 so that the operation air does not leak. The O-ring is fixed by providing an annular groove in the circumferential direction on the outer peripheral surface of the valve body 1 so as not to cause a misalignment at the time of drop-in. Therefore, the operating air can be introduced from any position of the annular groove, in other words, from an arbitrary position of 360 °.

Further, in the case of the present embodiment, the liquid agent supply hole 23 is formed with two routes, one _{for liquid agent inflow (referred to as liquid agent introduction hole 23 IN} ) and the other for liquid agent reflux (referred to as liquid agent reflux hole 23 _OUT). The liquid agent supply hole and the annular groove are arranged at the same position. That is, the annular groove 24 is formed so as to pass over the _{liquid agent introduction hole 23 IN and the} liquid agent recirculation hole 23 _{OUT in the circumferential direction.} In other words, the liquid agent introduction hole 23 _{IN and the} liquid agent recirculation hole 23 _OUT are formed so as to open at the bottom surfaces of the two annular grooves 24 in the circumferential direction dug in the outer peripheral surface of the valve body 1. Further, a liquid agent leak seal, for example, an O-ring 25 is arranged vertically (axially) across the annular grooves 24 of the liquid agent introduction hole 23 _{IN and the} liquid agent recirculation hole 23 _{OUT so that the liquid agent does not leak.} .. The O-ring 25 is preferably fixed by providing an annular groove in the circumferential direction on the outer peripheral surface of the valve body 1 so as not to cause a misalignment at the time of drop-in. Therefore, the liquid agent can be introduced from any position of the annular groove, in other words, from an arbitrary position of 360 °, and can be discharged / recovered from an arbitrary position of 360 °. In this embodiment, a _{seal is not installed between the liquid agent introduction hole 23 IN} and the liquid agent recirculation hole 23 _OUT because strict mutual leakage does not matter (no leakage to the outside occurs). , May be provided as needed.

The valve body 1 has a male screw portion 34 under a drive unit 17 having a built-in piston mechanism, and the male screw portion 34 is screwed into a female screw 12 provided under a recess 3 of the upper block 2a of the manifold 2. Then, it is fixed to the manifold 2. Therefore, the valve body 1 is assembled by simply inserting the drop-in body 27 into the recess 3 and the vertical hole 4 from above the manifold 2 and then screwing it in. Accurate positioning is performed by the lower end of the drop-in body 27 hitting the step portion 4a of the vertical hole 4.

The valve according to this embodiment includes a valve seat 30 including a liquid agent discharge port 29 and an O-ring, and a valve seat assembly 28 that receives the tip end portion of the needle is screwed into the tip end of the drop-in body 27 and is connected to the needle 26. Consists of a needle valve.

This drop-in body accommodates a needle 26 that moves up and down by air drive inside the rod-shaped drop-in body 27, and is connected to the tip of the needle 26 with the valve seat assembly 28 provided at the tip of the drop-in body 27. A needle valve is formed between the valve seat (valve seat) 30 and the valve seat (valve seat) 30.

Reference numeral 37 in the drawing is a ball that is interposed between the upper end of the needle 26 and the micro-adjustment 38 and makes point contact between the two to prevent displacement of the micro-adjustment adjustment position due to the impact of the piston vertical movement. Is. Reference numeral 39 is a stroke adjusting screw, 40 is a hexagonal hole used for adjusting the rotation of the micro adjust, 42 is a liquid agent leakage prevention seal, and 43 is a micro adjust play prevention elastomer ring. In the figure, unmarked black circles indicate stickers.

According to the liquid material coating gun module of the present embodiment, when used for discharging a liquid agent, for example, an adhesive, the piston 18 is pushed by supplying operating air until the ball 37 of the piston 18 comes into contact with the microadjustment 38. When it is raised and the valve is opened, the liquid under pressure is discharged. When the operation air is stopped (pressurization stop / release), the needle 26 is pushed down by the force of the spring 41 and the valve is closed, so that the adhesive discharge is stopped. The valve opening degree is adjusted by adjusting the micro adjust 38.

According to the liquid material coating gun module of the present embodiment configured as described above, both the operating air and the liquid agent can be supplied at any position on the circumference at 360 °. Therefore, it becomes easy to mount a plurality of valve main bodies 1 on the manifold 2 of one block. For example, as shown in FIGS. 7 and 8, a multi-valve can be easily configured by mounting a plurality of valve bodies 1 on one manifold 2 in a drop-in manner. In this case, since the liquid agent supply paths can be shared, the manifold 2 can be composed of a single block. The operating air is individually supplied to the cylinder chamber of each valve body 1 through the operating air supply holes 11 formed in the manifold 2. Reference numeral 46 in the figure is a blind plug.

Further, as shown in FIGS. 9 and 10, the valve main body 1 can be dropped in on the depth side as well, and a large number of valve main bodies 1 can be mounted vertically and horizontally on one manifold 2 block. For example, FIGS. 9 and 10 show an embodiment in which a total of 105 valves of 15 × 7 are arranged. Therefore, if the manifold 2 blocks are arranged diagonally so that the liquid liquid lines discharged from the vertical and horizontal valve main bodies 1 do not overlap, the discharged liquid liquid lines can be formed at a fine pitch. In this case as well, as in the case of the above-mentioned multigun, since the liquid agent supply paths can be shared, the manifold 2 composed of a single block can be configured. The operating air is individually supplied to the cylinder chamber of each valve body 1 through the operating air supply holes 11 formed in the manifold 2.

And, according to the multi-layered liquid material coating gun module, the arrangement interval of the valve body can be narrowed, and the density can be increased (the accumulation density can be increased). The pitch between dots can be narrowed. That is, since the valves can be arranged in the deep block manifold, the valves can be arranged in the depth direction, that is, in the vertical and horizontal directions, as compared with the conventional valves that can be arranged only in a horizontal row, so that the discharge pitch can be shortened. Moreover, if multi-layering is possible, the pitch between the lines and lines or the dots of the liquid liquid discharged from the nozzle can be further narrowed by arranging the liquid agent obliquely with respect to the discharge surface in the moving direction.

Further, since the valve body is wrapped in a manifold, the valve body can be heated from 360 °, so that the heating and heat retention efficiency is improved.

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 example of discharging the molten hot melt adhesive has been mainly described, but the present invention is not limited to this, and the adhesive or silicone resin for mounting an electronic component or the like on a circuit board is not limited to this. Needless to say, it can also be applied when applying and discharging a liquid substance such as a liquid.

Further, in the above-described embodiment, an annular groove is formed so as to pass over the operation air introduction hole opened on the outer peripheral surface of the valve body 1 (in other words, the operation air is formed at the groove bottom of the annular groove. The introduction hole is perforated), but the present invention is not particularly limited to this, and an annular groove is formed on the outer peripheral surface of the valve body 1 so as to pass through the position where the operation air supply hole 11 on the manifold 2 side opens. When the groove and the operation air introduction hole of the valve body 1 are formed at different positions, they may be connected by a communication groove (groove in the axial direction). Similarly, regarding the relationship between the liquid agent supply path and the annular groove, an annular groove is formed on the outer peripheral surface of the valve body 1 so as to pass through the position where the liquid agent supply path on the manifold 2 side opens, and the annular groove and the valve body 1 are formed. When the liquid agent introduction holes are formed at different positions, they may be connected by communication grooves (grooves in the axial direction).

Further, when the annular groove and the operation air introduction hole on the manifold 2 side are formed at different positions, the annular groove is formed so as to pass over the operation air introduction hole opened on the outer peripheral surface of the valve body 1. On the other hand, the opening of the operation air supply hole 11 on the manifold 2 side may be connected by a communication groove (groove in the axial direction). Similarly, regarding the relationship between the liquid agent supply path and the annular groove, an annular groove is formed on the outer peripheral surface of the valve body 1 so as to pass through the position where the liquid agent supply path on the manifold 2 side opens, and the annular groove and the valve body 1 are formed. When the liquid agent introduction holes are formed at different positions, they may be connected by communication grooves (grooves in the axial direction). That is, the annular groove, the operation air introduction hole opened on the outer peripheral surface of the valve body 1, and the operation air introduction hole opened on the inner peripheral surface of the recess of the manifold 2 do not necessarily have to be arranged on the same circumference. However, the annular grooves do not have to be arranged on the same circumference as these.

1 Valve body 2 Manifold 10 Liquid agent supply hole 11 Operation air supply hole 12 Operation air supply joint 13 Liquid agent joint (IN)
14 Liquid agent joint (OUT)
17 Drive unit 18 Piston 19 Cylinder chamber 20 Operation air supply hole 21 Circular groove (for operation air supply hole)
22 Seal for operating air 23 Liquid agent supply path 23 _IN Liquid agent supply path IN
23 _IN Liquid supply path OUT
24 Circular groove (for liquid agent supply path)
25 Liquid leak seal (O-ring)
26 Needle 27 Drop-in body

Claims (1)

In a liquid material coating gun module composed of a valve body and a manifold having a flow path for supplying operating air to the valve body and a flow path for supplying a liquid agent, a piston mechanism built in the outer peripheral surface of the valve body. An operation air introduction hole for driving the valve is formed, and a circumferential annular groove communicating with the operation air introduction hole is formed, and a liquid agent is applied to the liquid agent storage portion in the valve body on the outer peripheral surface of the valve body. The liquid agent supply hole to be supplied is opened and an annular groove in the circumferential direction communicating with the liquid agent supply hole is formed, and the operation air introduction hole and the liquid agent supply hole of the valve body interpose the respective annular grooves. A liquid material coating gun module characterized in that the flow path for supplying the operation air and the flow path for supplying the liquid agent of the manifold are communicated with each other.

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