Lubricant spraying device

Abstract

The present application provides a lubricant spraying device capable of forming a lubricating coating film more uniformly on a mold. The lubricant spraying device includes a nozzle for spraying a lubricant on a mold, the nozzle including a slit for spraying the lubricant at a tip end portion, the slit including a wide portion in which a slit width widens toward the tip end at least on a tip end side. Thus, the lubricant spraying device capable of forming a lubricating coating film more uniformly on a mold can be provided.

Description

Technical Field

[0001] This invention relates to a lubricant spraying device. Background Technology

[0002] Japanese Patent Application Publication No. 2010-207872 discloses a release agent coating apparatus for spraying and coating a release agent onto the forging surface of a die used in forging. Specifically, in Japanese Patent Application Publication No. 2010-207872, a release agent spraying manifold is arranged in the lower die and upper die after the forming process is completed, and the release agent is sprayed from each nozzle toward the corresponding part of the lower die and upper die. Summary of the Invention

[0003] However, in large molds such as the forging molds disclosed in Japanese Patent Application Publication No. 2010-207872, the area over which the lubricating coating is formed is relatively large, so there is a problem that it is difficult to form the lubricating coating evenly.

[0004] This invention was made to solve such a problem, and its purpose is to provide a lubricant spraying device that can form a lubricating film more evenly on a mold.

[0005] The lubricant spraying device according to the first aspect of the present invention includes a nozzle for spraying lubricant onto a mold, the nozzle having a slit at its top for spraying the lubricant, and the slit having a wide portion at least on the top side where the slit width increases as it moves toward the top.

[0006] According to the first aspect of the invention, the lubricant spraying device allows for a wider spray angle of the lubricant due to the wide portion of the slit. Therefore, it is possible to provide a lubricant spraying device capable of forming a more uniform lubricating coating on the mold.

[0007] The above and other objects, features, and advantages of the invention will become more fully understood through the detailed description given below, as well as the accompanying drawings, which are given by way of illustration only and are not intended to limit the invention. Attached Figure Description

[0008] Figure 1 This is a cross-sectional view that briefly illustrates an example of the configuration of the lubricant spraying device according to Embodiment 1 of the present invention.

[0009] Figure 2 This is a perspective view showing an example of a nozzle according to Embodiment 1 of the present invention, including its lower surface.

[0010] Figure 3 This is a perspective view showing an example of a nozzle according to Embodiment 1 of the present invention, including its upper surface.

[0011] Figure 4This is a perspective view including a cross-section, showing an example of the nozzle according to Embodiment 1 of the present invention.

[0012] Figure 5 This is a side view showing an example of a nozzle according to Embodiment 1 of the present invention. Detailed Implementation

[0013] Implementation Method 1

[0014] Hereinafter, Embodiment 1 of the present invention will be described with reference to the accompanying drawings. However, the present invention is not limited to Embodiment 1. In addition, for the sake of clarity, the following description and drawings are appropriately simplified.

[0015] Figure 1 This diagram illustrates an example of the configuration of the lubricant spraying device 100 according to Embodiment 1. Figure 1 As shown, the lubricant spraying device 100 includes a lubricant supply path 110, an inert gas supply path 120, a lubrication hand 130, and a nozzle 140. The lubricant spraying device 100 sprays lubricant from the nozzle 140 onto the mold, forming a lubricating film on the desired surface of the mold.

[0016] In particular, forging dies used to form vehicle parts are large in shape, requiring a large area to form a lubricating film. It is difficult to form a uniform lubricating film over such a large area. Furthermore, in cases where strength must be ensured, such as with vehicle parts, the die temperature is, for example, 280°C, higher than the typical die temperature (150°C to 200°C), leading to the Leidenfrost phenomenon and the problem of lubricant not adhering well to the die. However, as will be described later, by providing the nozzle 140 according to this embodiment, a lubricant spraying device 100 can be provided that can form a more uniform lubricating film on the die. Hereinafter, the lubricant spraying device 100 according to Embodiment 1 will be described in detail.

[0017] Lubricant supply path 110 supplies lubricant from a lubricant tank (not shown) containing lubricant to lubrication hand 130.

[0018] Inert gas supply path 120 supplies inert gas from inert gas generating device (not shown) to lubricating hand 130.

[0019] The lubrication hand 130 includes a first flow path 131 communicating with a lubricant supply path 110 and a second flow path 132 communicating with an inert gas supply path 120. The first flow path 131 and the second flow path 132 are arranged opposite to each other and are in communication. In addition, the lubrication hand 130 includes a third flow path 133 that is arranged intersecting with the first flow path 131 and the second flow path 132. Furthermore, the third flow path 133 is in communication with the first flow path 131 and the second flow path 132. Therefore, the lubricant supplied through the first flow path 131 and the inert gas supplied through the second flow path are mixed at the junction of the first flow path 131 and the second flow path 132, and the mixed lubricant and inert gas flow into the third flow path 133.

[0020] The perspective view including the lower surface, the perspective view including the upper surface, and the perspective view including the cross-section of the nozzle 140 are shown respectively. Figures 2-4 . Figure 4 This is a perspective view showing the nozzle 140 cut off at the location of the slit 145 (described later) with a plane parallel to the slit 145 and the axis of the nozzle 140. For example... Figures 2-4 As shown, the nozzle 140 has a cylindrical shape with a nozzle flow path 141 internally formed, communicating with the third flow path 133 of the lubricating hand 130. Therefore, the lubricant mixed with the inert gas that flows into the third flow path 133 of the lubricating hand 130 flows into the nozzle flow path 141. Furthermore, as... Figures 2-4 As shown, the nozzle 140 according to this embodiment has a generally cylindrical shape, but is not limited to this; it may also be an elliptical cylinder shape, a square cylinder shape, etc. In addition, the nozzle 140 includes a base 142, a central portion 143, and a top portion 144.

[0021] The base 142 has a ring shape and is connected to a designated connection part (not shown) of the lubricating hand 130 when the nozzle 140 is assembled to the lubricating hand 130, in such a way that the third flow path 133 of the lubricating hand 130 is connected to the nozzle flow path 141 of the nozzle 140.

[0022] The central portion 143 has a cylindrical shape with a width (diameter) smaller than that of the base portion 142, and a nozzle flow path 141 is formed inside it. The width (diameter) of the nozzle flow path 141 is substantially equal to the width (diameter) of the third flow path 133.

[0023] The top portion 144 is located on the top side of the central portion 143, that is, on the side of the central portion 143 opposite to the base portion 142. Furthermore, the top portion 144 has a generally dome shape that decreases in size towards the top. That is, the width (diameter) of the top portion 144 gradually decreases from a length equal to the width (diameter) of the central portion 143 as it moves towards the top.

[0024] Furthermore, the top portion 144 has a slit 145 at its center, parallel to the diameter of the outer shape of the central portion 143. This slit 145 communicates with the nozzle flow path 141, connecting the nozzle flow path 141 to the outside of the nozzle head 140. That is, the lubricant mixed with inert gas flowing into the nozzle flow path 141 is sprayed to the outside of the nozzle head 140 through the slit 145. The slit 145 has a length covering the entire diameter of the outer shape of the central portion 143. Therefore, the top portion 144 is divided into two parts by the slit 145. In addition, the length of the slit 145 is not limited to this, as long as it is longer than the diameter of the nozzle flow path 141.

[0025] Furthermore, the slit 145 has a wide portion 146 on its top side, the width of which increases as it approaches the top. This allows for a wider spray angle of the lubricant injected through the slit 145.

[0026] Furthermore, the axial length (hereinafter referred to as "depth") of the nozzle 140 of the wide section 146, the opening angle of the wide section 146, and the width of the slit 145 can be determined according to the type of lubricant, the desired range of lubricant application to the mold, etc.

[0027] Example 1

[0028] Figure 5 The image shows an embodiment 1 of the nozzle 140 according to this embodiment 1. For example... Figure 5 As shown, the opening angle θ of the wide portion 146 is preferably 40° or more. Furthermore, the depth D1 of the wide portion 146 is preferably 40% or more of the depth D2 of the slit 145. Additionally, the width W1 of the slit 145 is preferably 25% or more of the diameter W2 of the nozzle flow path 141.

[0029] According to the lubricant spraying device 100 of Embodiment 1 described above, the spray angle of the lubricant can be further widened by the wide portion 146 of the slit 145. Therefore, a lubricant spraying device 100 that can form a more uniform lubricating film on the mold can be provided.

[0030] In particular, without changing the configuration of the conventional two-fluid lubricant spraying device, only the nozzle installed on the lubricator 130 is changed to the nozzle 140 according to Embodiment 1, so costs can be reduced and the formation of the lubricant coating can be improved.

[0031] Furthermore, the opening angle of the wide portion 146 of the slit 145 is 40° or more, which allows for a more precise widening of the spray angle of the lubricant injected through the slit 145. As a result, a lubricating film can be formed uniformly over a larger area.

[0032] Furthermore, since the depth D1 of the wide portion 146 is more than 40% of the depth D2 of the slit 145, the spray angle of the lubricant sprayed through the slit 145 can be widened more accurately. As a result, a lubricating film can be formed uniformly over a larger area.

[0033] Furthermore, the width W1 of the slit 145 is more than 25% of the width (diameter) W2 of the nozzle flow path 141, so the spray angle of the lubricant sprayed through the slit 145 can be widened more accurately. As a result, a lubricating film can be formed more uniformly over a larger area.

[0034] Based on the foregoing description of the present invention, it is apparent that embodiments of the present invention can be modified in various ways. These modifications should not be considered as departing from the spirit and scope of the invention, and all such modifications, which will be apparent to those skilled in the art, are intended to be included within the scope of the appended claims.

Claims

1. A lubricant spraying device, It is equipped with a lubricant supply path, an inert gas supply path, a lubrication hand, and a nozzle for spraying lubricant onto the mold. The lubricant supply path supplies lubricant to the lubricating hand. The inert gas supply path supplies inert gas to the lubricating hand. The lubrication hand includes: a first flow path communicating with the lubricant supply path; a second flow path communicating with the inert gas supply path and disposed opposite to the first flow path; and a third flow path intersecting the first and second flow paths and extending from the connection between the first and second flow paths toward the nozzle. The nozzle has a base, a central portion, and a tip portion. The base has an annular shape and is connected to the lubricating hand. The central portion has a cylindrical shape with a nozzle flow path formed inside, and the base is connected to the lubricating hand, so that the nozzle flow path is in communication with the third flow path. The top portion has a dome shape, and the diameter of the top portion gradually decreases from a length equal to the diameter of the central portion as it approaches the top. The top end has a slit for spraying lubricant, which, after being mixed with inert gas at the connection between the first and second flow paths, is supplied from the third flow path to the nozzle flow path. The slit communicates with the nozzle flow path, is parallel to the diameter of the central portion, and has a length that extends across the entire diameter of the central portion. The width of the slit is at least 25% of the width of the nozzle flow path. The slit has at least a wide portion on the top side where the slit width increases as it moves toward the top.

2. The lubricant spraying device according to claim 1, The opening angle of the wide portion of the slit is 40° or more.

3. The lubricant spraying device according to claim 1 or 2, The depth of the wide portion is more than 40% of the depth of the gap.

Images