Lubricant applying device

Abstract

To provide a lubricant applying device allowed to apply a lubricant having liquid and powder mixed together to internal of a plunger sleeve of a die-cast machine.SOLUTION: A lubricant applying device comprises a mist ejecting unit 4 that mixes a liquid fed under pressure from a liquid line 1 and a gas fed under pressure from a gas line 2 together to be sprayed and a powder ejecting unit 5 that ejects a powder fed under pressure from a powder line 3, so that a liquid in a mist ejected from the mist ejecting unit 4 and a powder ejected from the powder ejecting unit 5, after mixed together in air, can be applied to internal of a plunger sleeve 21.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a lubricant application device that applies a lubricant, which is a mixture of liquid and powder, to the inside of an injection sleeve of a die casting machine. [Background technology]

[0002] Casting by a die casting machine, which injects molten metal such as aluminum alloy (molten metal) into a die at high speed and high pressure to form a product, is widely used in the production of various industrial products because of its excellent productivity and dimensional accuracy. Casting by such a die casting machine is premised on a process in which molten metal is supplied into a plunger sleeve that communicates with a cavity of a die, and the molten metal in the plunger sleeve is pushed into the cavity by a plunger tip. At that time, in order to reduce friction generated between the plunger tip and the plunger sleeve and to allow the plunger tip to slide smoothly, and also to achieve a heat retention effect of the molten metal, a lubricant is applied to the inside of the plunger sleeve in advance. Specifically, as shown in Patent Documents 1 and 2, a method is adopted in which a lubricant is sprayed into the plunger sleeve from above the molten metal supply port (Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP-A-10-166129 (FIG. 10) [Patent Document 2] JP 2004-291058 A

[0004] Currently, the lubricant sprayed into the plunger sleeve is generally either a liquid type or a liquid mixed with powder. Although the former is relatively inexpensive, it has the disadvantage of being inferior to the latter in terms of its poor heat retention of the molten metal. On the other hand, the latter is superior in performance to the former, but since powders with different specific gravities are dispersed in the liquid, it is not possible to completely avoid the disadvantage that the powder will settle in the liquid, which may result in the lubricant sprayed onto the plunger sleeve becoming non-uniform. Even if the lubricant is homogenized by thoroughly mixing the powder and the liquid, there is a risk that the powder will settle again in the conveying path during machine trouble or during a holiday shutdown, causing clogging, or that the water will evaporate from the discharge section. Summary of the Invention [Problem to be solved by the invention]

[0005] Therefore, in order to solve the above problems, the present invention aims to provide a lubricant application device that can apply a lubricant in a state in which liquid and powder are always uniformly mixed onto a plunger sleeve, and that does not cause problems such as clogging of the lubricant feed path or ejection part. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention provides a lubricant application device that applies a lubricant mixture of liquid and powder inside the plunger sleeve of a die casting machine, and is characterized in that it includes a liquid feed path that pressure-feeds the liquid supplied from a liquid supply source, a gas feed path that pressure-feeds gas supplied from a gas supply source, a powder feed path that pressure-feeds the powder supplied from a powder supply source, a mist ejection section that mixes and sprays the liquid pressure-feed from the liquid feed path and the gas pressure-feed from the gas feed path, and a powder ejection section that ejects the powder pressure-feed from the powder feed path, and the liquid in the mist ejected from the mist ejection section and the powder ejected from the powder ejection section are mixed in the air and then applied to the inside of the plunger sleeve.

[0007] In the present invention, the powder jetting portion is preferably disposed at an angle to the mist jetting portion so as to jet the powder toward the mist jetted from the mist jetting portion. Effect of the Invention

[0008] In the present invention, the liquid in the mist sprayed from the mist spray part and the powder sprayed from the powder spray part are mixed in the air before being applied to the plunger sleeve, so that the lubricant in a state where the powder is mixed evenly into the liquid can be applied to the inside of the plunger sleeve. Also, it is possible to eliminate clogging of the feed path or the spray part, which may occur when using a lubricant in which the powder is mixed into the liquid. [Brief description of the drawings]

[0009] [Figure 1] FIG. [Diagram 2] FIG. 1 is a schematic diagram of a lubricant application device. [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5] FIG. 4 is a schematic diagram showing the state in which lubricant is sprayed into a water supply port by a spray nozzle. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The present invention relates to a lubricant application device that applies a lubricant mixed with liquid and powder inside a plunger sleeve of a die casting machine. This lubricant application device is generally composed of a liquid feed path 1 that pressure-feeds liquid supplied from a liquid supply source, a gas feed path 2 that pressure-feeds gas supplied from a gas supply source, a powder feed path 3 that pressure-feeds powder supplied from a powder supply source, a mist ejection part 4 that mixes and sprays the liquid pressure-feed from the liquid feed path 1 and the gas pressure-feed from the gas feed path 2, and a powder ejection part 5 that ejects the powder pressure-feed from the powder feed path 3. Incidentally, the mist ejection part 4 and the powder ejection part 5 of the lubricant application device in this embodiment are collectively configured as one member called a spray nozzle 6. It is assumed that the lubricant application device according to the present invention is provided in a die casting machine, so first, the configuration of the die casting machine M in this embodiment will be briefly described.

[0011] FIG. 1 is a schematic diagram of a die-casting machine M according to this embodiment, and the die-casting machine M is roughly configured as follows. In order to clarify the positional relationship, the left side of FIG. 1 is the front side of the die-casting machine M, and the right side of FIG. 1 is the rear side of the die-casting machine M for convenience. In this die-casting machine M, a fixed platen 11, a movable platen 12, and a rear platen 13 are erected at a predetermined interval on a base 10. Specifically, the fixed platen 11 is erected at a position near the front of the die-casting machine M, the movable platen 12 is erected at approximately the center of the die-casting machine M, and the rear platen 13 is erected at a position near the rear end of the die-casting machine M. Tie bars 14 are stretched at the four corners of the fixed platen 11 and the movable platen 12 so as to connect them, and tie bars 15 are stretched at the four corners of the movable platen 12 and the rear platen 13 so as to connect them. A slide plate 16 is interposed between the base 10 and the lower ends of the fixed platen 11 and the movable platen 12, supporting the movable platen 12 so that it can slide. A fixed mold 17 is fixed to the inner surface of the fixed platen 11, and a movable mold 18 is fixed to the inner surface of the movable platen 12. A toggle link 19 is provided between the movable platen 12 and the rear platen 13, and this toggle link 19 is capable of moving the movable platen 12 toward or away from the fixed platen 11 by a hydraulic cylinder. That is, the toggle link 19 moves the movable mold 18 fixed to the movable platen 12, thereby performing so-called mold clamping and mold opening. The opposed surfaces of the fixed mold 17 and the movable mold 18 are formed with cavities 17a and 18a in which the shape of the casting is formed when they are clamped.

[0012] An injection mechanism 20 is formed from the fixed die 17 to the front of the die casting machine M. The injection mechanism 20 is a mechanism for supplying molten metal to the cavities 17a, 18a of the fixed die 17 and the movable die 18, and is configured as follows. First, a plunger sleeve 21 is formed at the lower end of the fixed platen 11 and the fixed die 17. The plunger sleeve 21 is composed of a sleeve 21a formed to penetrate the fixed platen 11 in the left-right direction and a sleeve 21b formed to penetrate the fixed die 17 in the left-right direction. Of these, the front end of the sleeve 21a protrudes forward of the fixed platen 11, and a supply port 22 for supplying molten metal is opened on the upper surface of the sleeve 21a. Furthermore, an injection cylinder 23 is connected to the front end of the plunger sleeve 21, and a plunger rod 25 with a plunger tip 24 at its tip is provided inside the injection cylinder 23. The plunger tip 24 is slidable in the axial direction within the plunger sleeve 21, and pressurizes the molten metal such as an aluminum alloy supplied into the plunger sleeve 21 from the supply port 22 of the plunger sleeve 21, and injects and pours the molten metal from the molten metal outlet 21c into the cavities 17a, 18a between the fixed die 17 and the movable die 18 in the clamped state. Furthermore, a spray nozzle 6 of a lubricant application device, the details of which will be described later, is disposed above the supply port 22 of the plunger sleeve 21. Specifically, the spray nozzle 6 is disposed so that its mist ejection portion 4 faces the supply port 22.

[0013] A robot 26 is disposed on the upper end of the fixed platen 11. A link member 28 rotatably connected to a support 27 is provided on the robot 26, and a device holder 30 is attached to the link member 28 via an arm 29. A plurality of nozzles 31 for applying a release agent are fixed to the tip of the device holder 30. When the movable die 18 is open relative to the fixed die 17, the link member 28 and arm 29 of the robot 26 move the device holder 30 to a predetermined position between the fixed die 17 and the movable die 18, so that the device holder 30 can be applied with a release agent or cooling water to appropriate locations on the inner surfaces of the fixed die 17 and the movable die 18.

[0014] Next, a lubricant application device that applies a lubricant inside the plunger sleeve 21 described above will be described. FIG. 2 is a schematic diagram of the installation of the lubricant application device according to this embodiment. As shown in FIG. 2, a liquid feed path 1 that feeds a liquid under pressure and a powder feed path 3 that feeds a powder under pressure exist separately and independently, and each feeds a liquid and a powder under pressure. On the other hand, a gas feed path 2 that feeds a gas supplied from a gas supply source is branched into a first gas feed path 2a and a second gas feed path 2b, of which the second gas feed path 2b is connected to the powder feed path 3. To explain each of these feed paths in more detail, the liquid feed path 1 is connected at its upstream side to a tank 35 as a liquid supply source, and at its downstream side to a liquid ejection path 47 of a spray nozzle 6 described later. An electromagnetic valve 36 is provided in the middle of the liquid feed path 1. On the other hand, the gas conveying path 2 is connected to the factory air 37 as a gas supply source at the upstream side, and is branched into a first gas conveying path 2a and a second gas conveying path 2b, of which the first gas conveying path 2a is connected to a gas ejection path 50 of the spray nozzle 6 described later at its downstream side, and the second gas conveying path 2b is connected to the powder conveying path 3 on its way. In addition, the first gas conveying path 2a and the second gas conveying path 2b are provided with pressure regulators 38, 40 and solenoid valves 39, 41 in this order from the upstream side. On the other hand, the powder conveying path 3 is connected to a powder hopper 42 as a powder supply source at its upstream side, and is connected to the second gas conveying path 2b on its way to be integrated. That is, the powder conveying path 3 and the second gas conveying path 2b are integrated via an ejector 43 on their way, and the downstream side is connected to the powder ejection part 5. In this embodiment, the powder feed path 3 (second gas feed path 2b) further branches into two on the downstream side, and each is connected to the powder ejection path 55 of the spray nozzle 6. However, it is not always necessary to branch the gas feed path 2 and connect it to the powder feed path 3 as in the above embodiment, and it is also possible to provide separate gas paths for the gas ejection path 50 and the powder ejection path 55.

[0015] As shown in Fig. 3 and Fig. 4, the spray nozzle 6 is composed of a nozzle body 6a and an outer fitting member 6b. The nozzle body 6a is a cylindrical member made of metal, and its tip portion is a thin-diameter portion 45 having a slightly narrower diameter, and an end fitting member 46 having the same diameter as the central portion is fixed to the other end portion (upstream end portion). A through-shaped liquid ejection passage 47 is formed in the axial center of the nozzle body 6a. Furthermore, the liquid ejection passage 47 has an opening at its tip portion (downstream end portion), and this opening portion serves as a liquid ejection port 48, while the end fitting member 46, which is the other end side (upstream end portion) of the liquid ejection passage 47, has a connecting portion 49 formed therein for connecting with the above-mentioned liquid feed passage 1. The downstream end portion of the liquid feed passage 1 is connected to the connecting portion 49, and the liquid pumped from the tank 35 is supplied to the liquid ejection passage 47 via the liquid feed passage 1, and is finally ejected from the liquid ejection port 48. In addition, a gas ejection path 50 is formed in a circular shape at a position slightly away from the liquid ejection path 47, that is, so as to surround the outer circumference of the liquid ejection path 47. Furthermore, the gas ejection path 50 has an open tip (downstream end), and this opening portion serves as a gas discharge port 51. Meanwhile, the other end side (upstream end) of the gas ejection path 50 is interrupted just before the end fitting member 46. Furthermore, a connecting portion 52 for connecting to the above-mentioned gas delivery path 2 is formed on the outer peripheral surface of the nozzle body 6a, slightly upstream of the axial center. The downstream end of the gas delivery path 2 is connected to the connecting portion 52, and air compressed from the factory air 37 is supplied to the gas ejection path 50 via the first gas delivery path 2a, and is ejected from the gas discharge port 51 of the gas ejection path 50. The liquid ejected from the liquid outlet 48 and the air ejected from the gas outlet 51 mix together immediately after ejection to form a mist, which is sprayed in a generally conical shape expanding in the ejection direction. In this embodiment, the mist ejection section 4 is formed by the nozzle body 6a having the above-mentioned configuration, but the detailed configuration of the nozzle body 6a can be freely designed. In addition, the mist ejection section 4 described above has the liquid ejection path, liquid ejection port, gas ejection path, and gas ejection port all concentrated in the nozzle body 6a, but it is also possible to eject the liquid and eject the gas using separate members.In short, the mist ejection portion only needs to be capable of mixing liquid and gas and ejecting the mixture as mist.

[0016] The outer fitting member 6b is a cylindrical member made of the same metal as the nozzle body 6a, and is fixed to the small diameter portion 45 of the nozzle body 6a. Specifically, the outer fitting member 6b is donut-shaped with a through-hole in the center, and this hole is fitted into the small diameter portion 45 of the nozzle body 6a. A circumferential powder ejection path 55 is formed slightly inside the outer periphery of the outer fitting member 6b. Furthermore, the tip (downstream end) of the powder ejection path 55 is open all around, and this opening portion serves as a powder discharge port 56. On the other hand, a connecting portion 57 is formed at two points on the other end side (upstream end) of the powder ejection path 55 for connecting it to the above-mentioned powder delivery path 3 (second gas path 2b). The downstream end of the powder delivery path 3 is connected to the connecting portion 57. In addition, the tip side of the powder ejection path 55 is inclined toward the inside (the nozzle body 6a side), so that the powder is ejected from the powder ejection port 56 toward the inside, that is, toward the mist ejected from the nozzle body 6a. Incidentally, in the above embodiment, an example in which the powder ejection port 56 is open all around the circumference is shown, but as long as an opening that can eject the powder is formed, it does not necessarily have to be in a circumferential shape. In addition, in the mist ejection part 4 described above, the liquid ejection path, the liquid ejection port, the gas ejection path, and the gas ejection port are concentrated in one member, the nozzle body 6a, but it is also possible to eject the liquid and the gas with different members. In short, it is sufficient that the mist ejection part is capable of mixing the liquid and the gas and ejecting them as mist.

[0017] The liquid in the present invention refers to a liquid mainly consisting of water, mineral oil, alcohol, hydrocarbon, or other organic solvent, and may be a solution in which the following components are dissolved, emulsified, or dispersed. The components of the above solution may contain one or more of water, silicone oil, mineral oil, oils and fats, waxes, surfactants, metal soaps, inorganic salts, organic acid salts, thickeners, rust inhibitors, preservatives, paints, etc. In addition, commercially available products such as casting release agents and lubricants can also be used as the liquid in the present invention. On the other hand, the powder in the present invention can be inorganic compounds such as graphite, boron nitride, silicon nitride, talc, and mica, inorganic salts, organic acid salts, and heat-resistant resins, and other organic compounds. In addition, commercially available products such as powder release agents and powder lubricants can also be used as the powder in the present invention.

[0018] Next, the operation of the lubricant application device in the present embodiment configured as described above will be described. First, the solenoid valve 36 provided in the liquid feed path 1 is operated to allow the liquid in the tank 35 to flow into the liquid feed path 1, and the solenoid valves 40 and 41 provided in the gas feed path 2 are operated to allow the factory air 37 to flow into the gas feed path 2. Then, the liquid in the liquid feed path 1 is pressure-fed to the liquid ejection path 47 of the nozzle main body 6a, and then ejected from the liquid ejection port 48 of the nozzle main body 6a. In addition, the air in the gas feed path 2 is branched into the first gas feed path 2a and the second gas feed path 2b, and is pressure-fed to both of the feed paths 2a and 2b. Among these, the air in the first gas feed path 2a is ejected from the gas ejection port 51 of the nozzle main body 6a after reaching the gas ejection path 50 of the spray nozzle 6 (nozzle main body 6a). At this time, the liquid ejected from the liquid outlet 48 of the nozzle body 6a and the air ejected from the gas outlet 51 mix with each other immediately after ejection to form a spray, and this spray is sprayed in a generally conical shape that expands as it advances in the ejection direction, as shown in Fig. 5. On the other hand, when the air in the second gas passage 2b passes through the ejector 43, it becomes the driving force of the ejector 43, creating a vacuum state on the upstream side of the powder passage 3, and causes the powder in the powder hopper 42 to flow into the powder passage 3. As a result, the powder is sucked into the ejector 43 and merges with the second gas passage 2b (the powder passage 3 on the downstream side), and is supplied to the powder ejection passage 55 of the spray nozzle 6 (the outer fitting member 6b) together with the air in the second gas passage 2b, and is finally ejected from the powder outlet 56 of the spray nozzle 6. At this time, because the powder ejection passage 55 is arranged at an inward angle, the powder ejected from the powder outlet 56 flies out toward the spray flow ejected from the nozzle body 6a and mixes with the spray flow in the air. Since the mist ejection part 4 and the powder ejection part 5 of the spray nozzle 6 are arranged to face the hot water supply port 22 of the plunger sleeve 21, the liquid in the mist ejected from the mist ejection part 4 and the powder ejected from the powder ejection part 5 are mixed in the air at a position facing the hot water supply port 22 of the plunger sleeve, and the lubricant in this mixed state is applied (sprayed) to the inside of the plunger sleeve 21 from the hot water supply port 22 of the plunger sleeve 21.As a result, the lubricant, which is a mixture of powder and liquid, adheres to the inner circumferential surface of the plunger sleeve 21, reducing the friction generated between the plunger tip 24 and the plunger sleeve 21, allowing the plunger tip to slide well. In addition, the lubricant can prevent the heat of the molten metal from being taken away by the plunger sleeve. The timing of the mist and powder ejected from the nozzle body 6 can be selected arbitrarily, and they may be ejected at the same time, but it is more effective to shift the timing of the ejection of both. That is, since the powder alone cannot adhere to the inside of the plunger sleeve even if it is sprayed into the plunger sleeve, if the powder is ejected before the liquid, much of it will scatter, but if the spray flow is ejected first and the powder is merged with this spray flow later, the amount of powder that is scattered in vain can be significantly reduced. Similarly, the timing of stopping the ejection of the mist and powder can also be selected arbitrarily, and for example, if the ejection of the powder is stopped first, the amount of powder that is scattered in vain can be reduced.

[0019] Incidentally, in the above embodiment, the mist jetting part 4 and the powder jetting part 5 are formed together in the spray nozzle 6, but it is also possible to form them separately. In other words, if the powder jetted from the powder jetting part can be mixed in the air with the mist jetted from the mist jetting part, it is also possible to form the powder jetting part by, for example, a tubular nozzle that is separate and independent from the spray nozzle.

[0020] In the embodiment of the lubricant application device described above, the mist ejection part 4 and the powder ejection part 5 are provided at a position facing the molten metal inlet 22 of the plunger sleeve 21, and the lubricant is sprayed toward the molten metal inlet 22. However, the present invention is not limited to this, and the lubricant may be sprayed from the molten metal outlet 21c side of the plunger sleeve 21 to apply the lubricant to the inside of the plunger sleeve 21. That is, by providing the mist ejection part 4 and the powder ejection part 5 on some means for moving them to the molten metal outlet 21c, they may be moved to a position facing the molten metal outlet 21c of the plunger sleeve 21 as necessary, and the lubricant may be sprayed from the molten metal outlet 21c side. As one method, for example, the mist ejection part 4 and the powder ejection part 5 may be provided on the device holder 30 of the robot 26 of the die casting machine M described above, and the robot 26 may move them to the molten metal outlet 21c of the plunger sleeve 21. Moreover, it is of course possible to provide a means for moving the mist ejection unit 4 and the powder ejection unit 5 separately from the robot 26. EXAMPLES

[0021] Table 1 shows the results of a test conducted to determine the appropriate angle when the powder ejection path 55 is inclined inward at different angles. The angle here is the angle θ between the imaginary line A extending from the center of the spray nozzle 6 in the axial direction and the imaginary line B extending from the center of the powder discharge port 56 in the axial direction, as shown in FIG. 5. According to the test results, a large amount of powder scattering occurred in the range of 2 degrees, which is slightly angled from 0 degrees, where the liquid discharge port 48 of the spray nozzle 6 and the powder discharge port 56 are parallel. This tendency improved from 4 degrees, and when the angle was 6 degrees or more, mixed coating with less powder scattering and floating was realized. On the other hand, when the angle was large, in the range of 25 degrees to 20 degrees, the deposited film became non-uniform. It was found that this tendency improved at 18 degrees and 16 degrees, and a uniform film was formed at 14 degrees or less.

[0022] [Table 1] Evaluation Metrics Scattering: Visual evaluation of scattered and floating powder that does not adhere to the coating object 〇 Less scattering and floating △ Slightly more scattering and floating × High scattering and floating Adhesion: Visually evaluate the uniformity of the deposited film 〇 Uniform film formation within the deposition area △ The film within the adhesion area is slightly uneven. × The film within the adhesion area is uneven

[0023] Table 2 shows the results of a test conducted to determine how far apart the liquid outlet 48 and powder outlet 56 of the spray nozzle 6 should be to allow the spray flow and powder to mix well. The test results show that when the liquid outlet 48 and powder outlet 56 are close to each other at 10 mm, there is a lot of powder scattering and the deposited film is not uniform. This tendency improves from 20 mm, and mixed coating with little powder scattering is achieved at 30 mm or more. On the other hand, it was found that scattering becomes somewhat more frequent from 150 mm, and that when it exceeds 200 mm, there is a lot of scattering and the deposition state becomes somewhat uneven.

[0024] [Table 2] Evaluation Metrics Scattering: Visual evaluation of scattered and floating powder that does not adhere to the coating object 〇 Less scattering and floating △ Slightly more scattering and floating × High scattering and floating Adhesion: Visually evaluate the uniformity of the deposited film 〇 Uniform film formation within the deposition area △ The film within the adhesion area is slightly uneven. × The film within the adhesion area is uneven

[0025] Table 3 shows the test results showing the relative ejection speeds of the liquid and powder ejected from the spray nozzle 6. Usually, lubricant is ejected at a speed of 3 to 50 m / s. As a result of the test, it was found that when there is a speed difference between the liquid and the powder, the relative speed of the liquid and the powder is the same or faster than the liquid, and good results are obtained. That is, under conditions where the ejection speeds of the liquid and the powder are the same or faster than the liquid by about 40%, the powder was less scattered and adhered uniformly. This is considered to be because the liquid efficiently catches the powder floating in the space and forms a film. However, it was found that when the speed of the liquid becomes too fast, specifically, when the liquid is about 60% faster than the ejection speed of the powder, the attached film becomes non-uniform. On the other hand, it was found that the amount of powder scattered increases under conditions where the liquid is about 20% slower, and the amount of powder scattered increases as the liquid becomes slower.

[0026] [Table 3] Evaluation Metrics Scattering: Visual evaluation of scattered and floating powder that does not adhere to the coating object 〇 Less scattering and floating △ Slightly more scattering and floating × High scattering and floating Adhesion: Visually evaluate the uniformity of the deposited film 〇 Uniform film formation within the deposition area △ The film within the adhesion area is slightly uneven. × The film within the adhesion area is uneven [Explanation of symbols]

[0027] M Die Casting Machine 1 Liquid transport path 2 Gas Transmission Line 3 Powder transport path 5 Mist outlet 6 Powder spouting part 37 Factory air (gas supply source) 42 Powder hopper (powder supply source)

Claims

1. A lubricant application device that applies a lubricant, which is a mixture of liquid and powder, to the inside of a plunger sleeve of a die casting machine, the liquid supply path pressurized to feed the liquid supplied from a liquid supply source, a gas supply path pressurized to feed the gas supplied from a gas supply source, a powder supply path pressurized to feed the powder supplied from a powder supply source, a mist ejection unit that mixes and sprays the liquid pressure-fed from the liquid supply path and the gas pressure-fed from the gas supply path, and a powder ejection unit that ejects the powder pressure-fed from the powder supply path, A lubricant application device characterized in that the liquid in the mist sprayed from the mist spraying portion and the powder sprayed from the powder spraying portion are mixed in the air and then applied inside the plunger sleeve.

2. 2. The lubricant application device according to claim 1, wherein the powder jetting portion is disposed at an angle to the mist jetting portion so as to jet the powder toward the mist jetted from the mist jetting portion.

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