JP2015085404A - Solution injection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a solution injection form in a solution injection device for injecting a solution such as a coolant.SOLUTION: A hollow shaft 11 having a coolant passage 17 is rotated by a motor 4 to adjust a rotating angle (direction) of a nozzle 31. Air supplied from an air supply source AS is mixed with a coolant supplied from a coolant supply source CS and then is injected from the nozzle 31 via the coolant passage 17 in the form of a mist. The flow rate of the air is adjusted by an air adjusting valve 55, so as to adjust a mixing ratio between the coolant and the air. Since the coolant is injected in the mist form, the coolant can be uniformly supplied to a wide range. A back-flow of the coolant and the air can be prevented by check valves 56, 57.

Description

  The present invention injects coolant such as coolant, mold release agent, cleaning agent, etc. that can be used for spraying coolant onto a processing site during machining, applying a release agent to a mold, and cleaning with a cleaning agent. The liquid agent injection device for

  For example, when performing machine processing such as cutting and grinding using a machine tool, processing is performed while supplying coolant (cutting fluid, grinding fluid, etc.) to the processing site for lubrication, cooling, chip removal, prevention of welding, etc. Is done. In such machining, it is desired to appropriately supply coolant to the machining site from the viewpoint of ensuring machining stability and machining accuracy. Therefore, in various automatic machine tools such as NC machine tools and machining centers, there are various types of coolant injection devices that automatically adjust the coolant injection angle in accordance with the progress of processing so as to appropriately inject coolant into the processing site. Proposed. In this type of coolant injection device, the nozzle for injecting coolant is driven by a motor, and the position and angle of the nozzle are adjusted according to tool change, machining progress, etc., so that coolant is accurately injected to the processing site. Like to do.

  Since the coolant injection device is exposed to the splash of coolant and chips generated by machining, sufficient drip-proof and dust-proof properties are required for the servo motor and the reduction gear mechanism that drive the nozzle. Since it is necessary to install in a limited space of an automatic machine tool such as a machining center or an NC machine tool, downsizing is desired. In order to meet such a demand, for example, Patent Document 1 discloses that a hollow shaft forming a coolant flow path is connected to an output shaft of a motor and rotationally driven, and a coolant injection nozzle is integrated with the hollow shaft. Thus, a coolant injection device that improves drip-proof and dust-proof properties and enables downsizing is disclosed.

JP 2012-228739 A

  In the coolant injection device, it is desired to improve the coolant injection mode in order to further increase the efficiency such as lubrication with coolant, cooling, chip removal, and prevention of welding.

  The present invention has been made in view of the above points, and it is an object of the present invention to provide a liquid agent injection device capable of adjusting the rotation angle of a nozzle and injecting a mixture of a liquid agent such as a coolant and air. And

In order to solve the above-described problem, a liquid agent injection device according to a first aspect of the present invention includes a nozzle for injecting a liquid agent, a motor for adjusting a rotation angle of the nozzle, and a liquid agent supply source connected to the nozzle. A liquid agent connecting means for connecting an air supply source to the nozzle, a liquid agent supplied to the liquid agent connecting means, and an air supplied to the air connecting means, And a mixing means for supplying.
According to a second aspect of the present invention, there is provided the liquid agent ejecting apparatus according to the first aspect, further comprising an adjusting unit that adjusts a flow rate of at least one of the liquid agent and the air supplied to the mixing unit.
According to a third aspect of the present invention, there is provided the liquid agent injection device according to the first or second aspect, wherein the liquid agent check valve permits only the flow of the liquid agent from the liquid agent supply source side to the mixing means side, and the air An air check valve that allows only an air flow from the supply source side to the mixing means side is provided.
According to a fourth aspect of the present invention, there is provided the liquid agent injection device according to any one of the first to third aspects, wherein the liquid agent is a coolant.
According to a fifth aspect of the present invention, there is provided the liquid agent injection device according to any one of the first to fourth aspects, wherein the hollow shaft is connected to the nozzle and has a liquid agent passage formed therein, and the hollow shaft is rotatable. A liquid-tightly inserted housing; a through hole provided in a side wall of the hollow shaft and opening into the housing; and the mixing means provided in the housing and communicating with the liquid agent passage through the through hole And an entrance passage connected to
One end of the hollow shaft and the output shaft of the motor are coaxially arranged and connected.

According to the liquid agent injection apparatus of the first aspect of the invention, the direction of the nozzle can be adjusted by the rotation of the motor, and the liquid agent can be mixed with air and injected in the form of a mist.
According to the liquid injection device of the invention according to claim 2, the mixing ratio of the liquid and air can be adjusted by the adjusting means.
According to the liquid injection device of the invention according to claim 3, it is possible to prevent the back flow of the liquid and air.
According to the liquid injection device of the invention according to claim 4, the coolant can be mixed with air and injected in the form of a mist.
According to the liquid injection device of the invention according to claim 5, the motor can be isolated from the coolant while making it possible to adjust the rotation angle of the nozzle.

It is a circuit diagram showing a schematic structure of a coolant injection device concerning a 1st embodiment of the present invention. It is a perspective view of the state which removed the cover of the coolant injection device shown in FIG. It is a front view of the state which removed the cover body of the coolant injection apparatus shown in FIG. It is a longitudinal cross-sectional view of the injection device main body of the coolant injection device shown in FIG. It is a perspective view of the state which removed the cover of the coolant injection device concerning a 2nd embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
A first embodiment of the present invention will be described with reference to FIGS. A circuit diagram showing a schematic configuration of the coolant injection device 50 according to the present embodiment is shown in FIG. 1, and specific structures are shown in FIGS.

  As shown in FIGS. 1 to 4, the coolant injection device 50 (liquid injection device) according to the present embodiment is attached to a numerical control (NC) machine tool such as an NC drilling machine, an NC milling machine, an NC lathe, or a machining center. At the processing site, air is mixed with coolant, which is a liquid agent, and sprayed in a mist form. The coolant injection device 50 includes an injection device main body 51 having a nozzle 31 for injecting coolant, and a coolant inlet joint 52 (liquid agent connection means) for connection to an external coolant supply source CS and an air supply source AS (see FIG. 1). ) And an air inlet joint 53 (air connection means), a mixing joint 54 (mixing means) for mixing the coolant and air supplied from the coolant supply source CS and the air supply source AS, and an air adjustment for adjusting the flow rate of the air Accommodates a valve 55, check valves 56 and 57 (fluid check valve, air check valve) that prevent backflow of coolant and air, and a mixed joint 54, an air adjustment valve 55, and check valves 56 and 57. And a valve case 58 is provided.

The injection device main body 51 will be described with reference to FIG.
The injection device main body 51 is integrated with the movable nozzle unit 3 and the motor 4 in the case 2. The case 2 can be a substantially rectangular parallelepiped box-shaped main body that houses the movable nozzle unit 3 and the motor 4, and the opening can be closed with a lid to seal the inside. A sensor chamber 5 is formed with a gap between an end portion inside the case 2 and the movable nozzle unit 3. Further, the inner surface of the case 2 is provided with irregularities such as ribs 2 </ b> A, and a gap for heat dissipation is formed between the movable nozzle unit 3 and the motor 4. The case 2 can be formed of an appropriate material such as a synthetic resin or an aluminum alloy.

  The movable nozzle unit 3 includes a housing 6. The housing 6 has a substantially rectangular parallelepiped outer shape, and has a stepped opening formed by a small-diameter bore 7A at the center and large-diameter bores 7B and 7C at both ends. Guide members 8 and 9 having guide bores 8A and 9A having smaller diameters than the central small diameter bore 7A are liquid-tightly fitted to the large diameter bores 7B and 7C at both ends. A hollow shaft 11 passing through the housing 6 is rotatably and liquid-tightly inserted into the guide bores 8A and 9A of the guide members 8 and 9. Thereby, the nozzle chamber 10 is formed between the small diameter bore 7 </ b> A of the housing 6 and the hollow shaft 11. Tapered portions 8B and 9B connected to the nozzle chamber 10 are formed at the ends of the guide members 8 and 9 on the nozzle chamber 10 side. The housing 6 can be formed of a suitable material such as a synthetic resin, and can be appropriately hollowed out.

  The hollow shaft 11 is rotatably supported by bearings 12 and 13 fitted on both sides of the guide members 8 and 9 of the large-diameter bores 7B and 7C of the housing 6. A space between the hollow shaft 11 and the guide bores 8A and 9A of the guide members 8 and 9 is sealed by O-rings 14 and 15. A plurality of O-rings 14 and 15 are provided to form a multistage seal. The hollow shaft 11 passes through the sensor chamber 5 and extends through the opening 16 provided at the end of the case 2 to the outside of the case 2.

  The hollow shaft 11 is formed with a coolant passage 17 (liquid agent passage) extending along the axis thereof, and one end portion of the coolant passage 17 is opened at a front end portion of the hollow shaft 11 extending to the outside of the case 2, and the motor 4 The end on the side is closed. A plurality of through holes 18 that allow the coolant passage 17 and the nozzle chamber 10 to communicate with each other are passed through the side wall of the hollow shaft 11. An inlet passage 19 communicating with the nozzle chamber 10 is provided on the side wall of the housing 6, and the inlet passage 19 protrudes from the housing 6 and extends through the opening 20 provided on the side wall of the case 2 to the outside of the case 2. ing.

  A connecting portion 21 is formed at the end of the hollow shaft 11 on the motor 4 side. A coupler 24 that engages with the connecting portion 21 is press-fitted into the output shaft 23 of the motor 4. The tip of the output shaft 23 protrudes through the coupler 24. The connecting portion 21 of the hollow shaft 11 is formed in a convex shape with two chamfered tip portions, and has a forked shape with a bore 21A for receiving the tip portion of the output shaft 23 protruding from the coupler 24 at the center portion. . The coupler 24 is formed in a concave shape having a groove portion for receiving the convex end portion of the connecting portion 21. Then, the rotational force is transmitted between the hollow shaft 11 and the output shaft 23 of the motor 4 by the engagement between the connecting portion 21 and the coupler 24. The motor 4 is coupled to the end of the housing 6 via a coupling member 22 so that the housing 6 and the motor 4 are integrated. The coupling member 22 positions the hollow shaft 11 and the output shaft 23 of the motor 4 coaxially. The coupling member 22 and the housing 6 and the motor 4 are sealed by O-rings 22A and 22B, respectively. In addition, the shape of the coupler 24 attached to the connecting portion 21 of the hollow shaft 11 and the output shaft 23 of the motor 4 is not limited to the above-described two-chamfered shape, and any shape that can transmit a rotational force between them can be used. Other shapes may be used.

  The motor 4 can control the rotation angle of the output shaft 23 and can be a known servo motor or stepping motor. Further, as the stepping motor, any of a variable reluctance type, a permanent magnet type, or a hybrid type combining these may be used. However, in this embodiment, since the adjustable step angle is sufficiently small, the hybrid type stepping motor is used. A motor is used.

  The housing 6 integrated with the motor 4 is connected to a threaded portion 19A on the outer periphery of the inlet passage 19 that extends through the opening 20 of the case 2 via a sealing material 25 (such as a rubber washer) and a washer 26. The joint 27 is fixed to the case 2 together with the motor 4 by screwing. A gap between the hollow shaft 11 protruding outside from the opening 16 of the case 2 and the opening 16 of the case 2 is sealed by a lip seal 28 attached to the hollow shaft 11.

  An origin position sensor 29 that detects the origin position of the hollow shaft 11 is provided in the sensor chamber 5. The origin position sensor 29 includes a magnet holder 29A fixed to the hollow shaft 11 and an element 29B fixed to the case 2 side so as to face the magnet holder 29A, and is based on a magnet, a hall element, or the like attached thereto. The origin position of the hollow shaft 11 is detected based on a change in the magnetic field. The motor 4 and the origin position sensor 29 are connected to an external control device (not shown).

  An air supply port 30 that supplies air into the case 2 can be attached to the case 2. Then, an air hose (not shown) is connected to the air supply port 30, and air is supplied to the case 2 so that the inside of the case 2 is constantly maintained at a positive pressure. Intrusion into the case 2 is prevented.

  A nozzle 31 oriented in a direction perpendicular to the hollow shaft 11 is attached to the tip of the hollow shaft 11 that protrudes outward from the case 2. The nozzle 31 is formed by integrally forming a substantially bottomed cylindrical mounting portion 32 that fits into the hollow shaft 11 and a tapered nozzle portion 33 that extends from the mounting portion 32 in the direction perpendicular thereto. The mounting portion 32 has a stepped shape including a bottom side bore 32A having the same diameter as the coolant passage 17 of the hollow shaft 11 and an opening side bore 32B having the same diameter as the outer diameter of the hollow shaft 11. . When the hollow shaft 11 is inserted into the bore 32B on the opening side, the tip of the hollow shaft 11 abuts on the stepped portion between the bores 32A and 32B, so that the insertion position of the hollow shaft is defined. The inner peripheral surface of the connecting portion between the coolant passage 17 of the shaft 11 and the bore 32A is flush with no step.

  The bottom portion 34 of the bore 32A of the attachment portion 32 is formed in a substantially hemispherical shape. The nozzle portion 33 is formed with a small-diameter nozzle passage 35 having one end opening at the substantially hemispherical bottom 34 of the mounting portion 32 and the other end opening at the tip of the nozzle portion 33. By forming the bottom 34 in a substantially hemispherical shape, the bore 32A of the mounting portion 32, which is a passage communicating with the coolant passage, and the nozzle passage 35 of the nozzle portion 33 are connected by a smoothly curved passage. The shape of the bottom 34 of the attachment portion 32 may be any shape as long as the bore 32A of the attachment portion 32 and the nozzle passage 35 are connected by a smoothly curved flow path in addition to the above-described hemispherical shape.

  An annular seal groove 37 for mounting the O-ring 36 is formed on the outer peripheral portion of the distal end of the hollow shaft 11, and an annular fixing groove 38 is further formed from the seal groove 37 to the base portion. A screw hole 39 is passed through the side wall of the mounting portion 32 of the nozzle 31 so as to face the fixing groove 38. Then, the O-ring 36 is attached to the seal groove 37 of the hollow shaft 11, the tip of the hollow shaft 11 is inserted into the bore 32 B of the mounting portion 32 of the nozzle 31, and the set screw 40 is screwed into the screw hole 39. The nozzle 31 is fixed to the hollow shaft 11 by engaging and pressing the distal end portion with the fixing groove 38 of the hollow shaft 11.

  A substantially flat mounting plate 2C is integrally formed on the back of the case 2 (see FIG. 2). The mounting plate 2C is provided with a mounting hole 2D having an appropriate shape such as a round hole or a long hole.

  The injection device main body 51 configured as described above supplies coolant to the inlet passage 19 and injects it through the nozzle chamber 10, the through hole 18 and the coolant passage 17, the bore 32 </ b> A of the nozzle 31, and the nozzle passage 35. By rotating the output shaft 23 of the motor 4 and controlling the rotation angle of the hollow shaft 11 connected to the output shaft 23, the rotation angle of the nozzle 31 can be adjusted, and the coolant is injected in a desired direction. Can do. The nozzle chamber 10 formed in the housing 6 may be omitted, and the coolant may be directly supplied from the inlet passage 19 to the through hole 18 of the hollow shaft 11.

  As shown in FIGS. 2 and 3, the valve case 58 has a stepped shape (substantially L-shaped) with a corner portion on one side of the rectangular parallelepiped cut off, and has substantially the same width as the case 2 of the injector main body 51. The end of the case 2 of the injection device main body 51 that houses the motor 4 is engaged with the stepped portion, and the case 2 is integrally attached to the case 2 of the injection device main body 51. The valve case 58 is formed in a box shape with one end opened, and the opening is closed by a lid (not shown) to seal the inside. The valve case 58 can be formed of an appropriate material such as a synthetic resin or an aluminum alloy. 2 and 3 show a state where the lid is not attached. In the valve case 58, a mixing joint 54, an air adjustment valve 55, and check valves 56 and 57 are accommodated.

  The mixed joint 54 is a branch joint having connection ports 54A and 54B branched into two and a connection port 54C for collecting them. The connection port 54 </ b> C in which the mixing joint 54 is assembled is connected to the outlet joint 60 by a pipe line 59. The outlet joint 60 is attached to the end of the valve case 58 on the injection device main body 51 side, and is connected to the pipe joint 27 of the injection device main body 51 via a pipe line 61 outside the valve case 58. One connection port 54 A branched into two of the mixing joint 54 is connected to the outlet of the check valve 56 by a pipe line 62, and the inlet of the check valve 56 is connected to the coolant inlet joint 52 by a pipe line 63. Yes. The other connection port 54 </ b> B branched into two of the mixing joint 54 is connected to the outlet of the check valve 57 by the pipe 64, and the inlet of the check valve 57 is connected to the outlet of the air adjustment valve 55 by the pipe 65. Has been. The inlet of the air adjustment valve 55 is connected to the air inlet joint 53 by a pipe line 66. The coolant inlet joint 52 and the air inlet joint 53 are attached to the end of the valve case 58 opposite to the end where the injection device main body 51 is attached, and include a coolant supply source including a pump and the like outside the valve case 58. Each can be connected to the CS and the air supply source AS (see FIG. 1).

  The check valve 56 allows only the coolant flow from the coolant inlet joint 52 side to the mixing joint 54 side and blocks the flow in the opposite direction. Further, the check valve 57 allows only the air flow from the air adjustment valve 55 side to the mixing joint 54 side and blocks the flow in the opposite direction.

  The air adjustment valve 55 is a variable flow control valve that controls the flow rate of air supplied from the air inlet joint 53 to the mixing joint 54, and an adjustment knob (not shown) projects outside the valve case 58. The flow rate can be adjusted by rotating the adjusting knob.

  Wirings of the motor 4 and the origin position sensor 29 of the injection device main body 51 are connected to a lead wire 67 extending to the outside of the valve case 58.

Next, the operation of the present embodiment configured as described above will be described.
The coolant injection device 50 is attached to an automatic machine tool such as an NC machine tool or a machining center with the nozzle 31 directed in an appropriate direction. A coolant supply source CS including a pump or the like is connected to the coolant inlet joint 52, an air supply source AS including a pump or the like is connected to the air inlet joint 63, and wiring of the motor 4 and the origin position sensor 29 is And connected to a control device (not shown) via a lead wire 67.

  Coolant and air are supplied to the coolant inlet joint 52 and the air inlet joint 53 from the external coolant supply source CS and the air supply source AS, respectively. The coolant supplied to the coolant inlet joint 52 flows to the one connection port 54 </ b> A of the mixing joint 54 through the pipe 63, the check valve 56 and the pipe 62. On the other hand, the air supplied to the air inlet joint 53 flows through the pipe line 66, the air adjustment valve 55, the pipe line 65, the check valve 57 and the pipe line 64 to the other connection port 54 </ b> B of the mixing joint 54. These coolant and air are mixed by the mixing joint 54, and from the connection port 54 </ b> C of the mixing joint 54 through the pipe 59, the outlet joint 60, the pipe 61 and the pipe joint 27, the inlet passage 19 of the injection device main body 51. To be supplied. The coolant and air supplied to the inlet passage 19 are jetted in a mist form through the nozzle chamber 10, the through hole 18 and the coolant passage 17, the bore 32 </ b> A of the nozzle 31 and the nozzle passage 35.

  At this time, the mixing ratio of the coolant and the air can be adjusted by adjusting the flow rate of the air mixed with the coolant by the air adjustment valve 55. Even when the pressure difference between the coolant and air supplied to the mixing joint 54 is large, the check valves 56 and 57 can prevent backflow of the coolant and air. The coolant supply source CS is connected to the air inlet joint 53, the air supply source AS is connected to the coolant inlet joint 52, and the coolant flow rate is adjusted by the air adjustment valve 55. You may make it adjust.

  Thus, coolant can be uniformly supplied over a wide range by mixing and injecting coolant and air into a mist. In addition, it is possible to form a coolant film uniformly, and it is possible to supply coolant suitable for grinding, finishing, and the like. Furthermore, the coolant injection mode can be diversified, and versatility can be improved. It should be noted that only the coolant can be injected from the nozzle 31 by adjusting the air flow rate to 0 by the air adjustment valve 55. Further, as the air adjustment valve 55, a solenoid valve whose flow rate can be adjusted by a control signal may be adopted, and the mixing ratio of the coolant and air may be adjusted by the control signal from the control device according to the machining state or the like.

  The rotation angle of the nozzle 31 can be adjusted by rotating the output shaft 23 of the motor 4 of the injection device main body 51 and controlling the rotation angle of the hollow shaft 11 connected to the output shaft 23. Air can be injected in a desired direction.

  As a result, the rotation angle of the nozzle 31 is adjusted according to the change in the tool tip position due to the change of the tool of the automatic machine tool or the change in the distance from the nozzle to the machining position due to the progress of machining. It is possible to inject coolant and air. At this time, since a stepping motor is used as the motor 4, control by an open loop is possible, and the motor drive circuit is simplified as compared with the case of performing control by a closed loop using a servo motor. Can do.

  When controlling the rotation angle of the nozzle 31, in addition to adjusting the injection angle of the nozzle in order to accurately apply the coolant and air to the cutting portion, chips of the processing portion are to be removed by the injection of the coolant and air. The removal of chips can be promoted by moving the nozzle 31 in a wider angle range. Further, the rotation of the nozzle can be performed while changing the constant speed or the speed. Further, by using a stepping motor as the motor 4, the control code (so-called M code) for auxiliary operation of the NC machine tool is used as a control signal for the motor 4 to cause the rotation angle of the nozzle 31 to follow the machining site. Since control becomes possible, the control circuit of the coolant injection device can be simplified.

  By allowing the coolant and air to flow through the coolant passage 17 inside the hollow shaft 11 that rotates the nozzle 31, it is possible to reduce the size of the injection device main body 51, in particular, to reduce the axial dimension, and a seal is required. It is possible to improve the drip-proof and dust-proof properties by reducing the number of parts. Further, by providing an air supply port 30 and supplying air into the case 2 so that the inside of the case 2 is always at a positive pressure, it is possible to effectively intrude foreign matter such as splashes of coolant and fine chips into the case 2. Can be prevented.

  The origin adjustment (zero point adjustment) of the initial position of the rotation angle of the output shaft 23 of the motor 4 (stepping motor) can be performed based on the detection position of the origin position sensor 29 attached to the hollow shaft 11. At this time, the nozzle 31 is fixed to the hollow shaft 11 by the set screw 40 and can be fixed at an arbitrary origin position with respect to the hollow shaft 11 to which the origin position sensor 29 is attached. The origin adjustment of the nozzle 31 can be easily adjusted without changing the fixing position of the sensor 29.

  Since the connection portion between the bore 32A of the nozzle 31 communicating with the coolant passage 17 of the hollow shaft 11 and the nozzle passage 35 disposed at a right angle to the bore 32A has a smooth curved shape, coolant and air circulate. In addition, since the resistance at the time of injection is small and an impact is hardly generated at the start and stop of coolant and air injection, the generation of noise is prevented, and the fluid force of the coolant and air applied to the nozzle 31 is reduced, so that the nozzle 31 Can be prevented, and durability and reliability can be improved.

  Next, a second embodiment of the present invention will be described with reference to FIG. In the following description, the same reference numerals are given to the same parts with respect to the first embodiment, and only different parts will be described in detail.

  As shown in FIG. 5, in the coolant injection device 70 according to the present embodiment, the case 2 of the injection device main body 51 and the valve case 58 of the first embodiment are integrated as an integrated case 71, and The movable nozzle unit 3 and the motor 4 of the injection device main body 51, the mixing joint 54, the air adjustment valve 55, and the check valves 56 and 57 are accommodated.

  The integrated case 71 includes a substantially rectangular parallelepiped injection device main body chamber 72 that houses the movable nozzle unit 3 and the motor 4, a substantially rectangular parallelepiped chamber 73 </ b> A adjacent to one side of the injection device main body chamber 72, and one end of the injection device main body chamber 72. And a substantially L-shaped valve chamber 73 composed of a substantially rectangular parallelepiped chamber 73B. The inlet passage 19 of the movable nozzle unit 3 accommodated in the injection device main body chamber 72 is inserted into a groove 74A formed in a partition wall 74 between the injection device chamber 72 and the chamber 73A of the valve chamber 73 and into the chamber 73A. It extends. A mixing joint 54 and an air-side check valve 57 are accommodated in the chamber 73A of the valve chamber 73, and an air adjustment valve 55 and a coolant-side check valve 56 are accommodated in the chamber 73B. The coolant inlet joint 52 and the air inlet joint 53 are provided on the end wall of the valve chamber 73 opposite to the chamber 73A side of the chamber 73B.

  The integral case 71 is formed with a mounting portion 75 extending on the same plane as the side surface portion on one side of the injection device main body chamber 72 and the valve chamber 73 on the side portion of the injection device main body chamber 72 opposite to the chamber 73B. ing. Further, a wiring board 76 for connecting the wiring from the motor 4 and the origin position sensor 29 (not shown) to the lead wire 67 is provided in a portion adjacent to the injection device main body chamber 72, the chamber 73B, and the mounting portion 75. It has been.

  With this configuration, the coolant injection device 70 according to the present embodiment can achieve the same effects as those of the first embodiment.

  In the first and second embodiments, the mixing ratio of the coolant and the air is adjusted by adjusting the flow rate of the air supplied to the mixing joint 54 by the air adjusting valve 55. It can be adjusted by adjusting the flow rate of the coolant supplied to the mixing joint 54 by providing a valve, and adjusting both the flow rate of the coolant and air by providing both the air adjustment valve and the coolant adjustment valve. You may make it adjust by.

  In the first and second embodiments described above, the present invention is applied to a coolant injection device as an example. However, the present invention is not limited to this, and separation from a mold such as injection molding, casting, forging, or the like. The present invention can also be applied to a liquid agent injection device such as a mold material injection device, a coating material for coating and surface treatment, an injection device such as a treatment agent, or an injection device such as a cleaning agent.

  DESCRIPTION OF SYMBOLS 4 ... Motor, 31 ... Nozzle, 50 ... Coolant injection apparatus (liquid agent injection apparatus), 52 ... Coolant connection joint (liquid agent connection means), 53 ... Air connection joint (air connection means), 54 ... Mixing joint (mixing means), AS ... Air supply source, CS ... Coolant supply source (Liquid supply source)

Claims (5)

  Nozzle for ejecting liquid agent, motor for adjusting the rotation angle of the nozzle, liquid agent connecting means for connecting a liquid agent supply source to the nozzle, and air connecting means for connecting an air supply source to the nozzle And a mixing means for mixing the liquid agent supplied to the liquid agent connecting means and the air supplied to the air connecting means and supplying the mixed liquid to the nozzle.   The liquid agent injection apparatus according to claim 1, further comprising an adjusting unit that adjusts a flow rate of at least one of the liquid agent and air supplied to the mixing unit.   A liquid check valve that allows only a flow of liquid from the liquid supply source to the mixing means, and an air check valve that allows only an air flow from the air supply to the mixing means. The liquid agent injection device according to claim 1, wherein the liquid agent injection device is provided.   The liquid agent injection device according to claim 1, wherein the liquid agent is a coolant. A hollow shaft connected to the nozzle and having a liquid agent passage formed therein, a housing in which the hollow shaft is rotatably and liquid-tightly inserted, and provided in a side wall of the hollow shaft and opening into the housing A through hole, and an inlet passage provided in the housing and connected to the mixing means through the through hole and connected to the liquid agent passage,
The liquid agent injection device according to claim 1, wherein one end of the hollow shaft and the output shaft of the motor are coaxially arranged and connected.

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