JP5261798B2 - Heat dissipation medium coating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat radiation medium coating apparatus which can coat the surface of a heat radiation unit with a heat radiation medium at a quantitative coating thickness. <P>SOLUTION: The heat radiation medium coating apparatus 1 is for coating the surface of the heat radiation unit 13 with the heat radiation medium 12, and includes a frame 2, a mask 3 supported by the frame 2 and having an opening 4 to expose the surface of the heat radiation unit 13, a squeegee frame 6 attached reciprocably to the frame 2, a squeegee 8 attached liftably to the squeegee frame 6, in which the width of a part contacting to the mask 3 is formed wider than the opening 4, and a spring 10 for squeegee biasing so as to allow the squeegee 8 to abut to the mask 3. The squeegee 8 is constituted so as to pass through above the opening 4 by moving together with the squeegee frame 6. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a heat dissipation medium coating apparatus, and more particularly to a heat dissipation medium coating apparatus for applying a heat dissipation medium to a surface of an object to be coated using a mask.

  As a technique for applying a heat radiating medium such as grease or compound to the heat radiating unit, a technique using a method used in cream solder printing or coating with a coating agent is mainly used. Specific methods for applying the heat dissipation medium include screen printing using a mask, dispenser application, and brush application.

  For example, Japanese Patent Laid-Open No. 2008-53330 discloses an apparatus for applying a heat dissipation medium by screen printing using a mask. This publication discloses a mechanism for holding a power semiconductor element, a mechanism for moving the holding mechanism portion to a fixed position, a metal mask having an opening shape for uniformly applying a thermal compound to the power semiconductor element, and a metal mask. There is described a thermal compound coating apparatus including a mechanism for raising and lowering a mask frame to which a mask is fixed and a mechanism for fixing a mask frame at a lower limit position. In this coating apparatus, a thermal compound placed on a metal mask having an opening shape is applied to a power semiconductor by a printing squeegee.

JP 2008-53330 A

  Screen printing, dispenser application, and brush application using the above-described mask largely depend on the experience and sense of the operator. Therefore, it is difficult to quantitatively manage the coating thickness of the heat dissipation medium. Therefore, it is difficult to stably ensure the quality of the coating thickness of the heat dissipation medium. When the coating thickness of the heat dissipation medium is not uniform, a gap is generated between the heat dissipation unit and the electronic component when the heat dissipation unit and the electronic component are mounted. As a result, there is a problem that the electronic components and the like are damaged.

  In the coating apparatus described in the above publication, the thermal mask is applied to the power semiconductor by the printing squeegee from the opening of the metal mask while the metal mask is fixed at the lower limit position and the metal mask and the power semiconductor are in contact with each other. The However, since there is no mechanism to control the printing direction or printing pressure (force applied to the printing squeegee) that affects the print finish, the worker who performs the coating is concerned with the coating quality (quality) of the heat dissipation medium such as the coating thickness. There is still a great deal of dependence on experience.

  This invention is made | formed in view of the said subject, The objective is to provide the thermal radiation medium coating apparatus which can apply | coat a thermal radiation medium on the surface of a thermal radiation unit with quantitative application | coating thickness.

The heat dissipation medium coating apparatus of the present invention is a heat dissipation medium coating apparatus for applying a heat dissipation medium to the surface of an object to be coated, and is supported by the frame and exposes the surface of the object to be coated. A squeegee frame attached to the frame so as to be able to reciprocate, and a squeegee attached to the squeegee frame so as to be movable up and down and having a width wider than the opening. And an urging member that urges the squeegee to abut against the mask. The squeegee is configured to pass over the opening by moving with the squeegee frame. The squeegee includes a plurality of squeegee members arranged side by side in the moving direction of the squeegee. A cam for alternately raising and lowering adjacent squeegee members of the plurality of squeegee members is further provided.

  According to the heat-dissipating medium coating device of the present invention, since the biasing member that biases the squeegee attached to the squeegee frame so as to be movable up and down so as to contact the mask is provided, A heat dissipation medium can be applied.

It is a schematic perspective view of the thermal radiation medium coating device in Embodiment 1 of this invention. It is a schematic front view of the squeegee member of the thermal radiation medium coating apparatus in Embodiment 1 of this invention. It is a schematic front view of the squeegee member of the thermal radiation medium coating apparatus in Embodiment 1 of this invention. It is a schematic perspective view which shows the squeegee, the squeegee frame, the handle | steering-wheel, and cam of the thermal radiation medium coating device in Embodiment 1 of this invention. It is a schematic side view which follows the VV line | wire of FIG. 4 which shows the squeegee, the handle | steering-wheel, and cam of the thermal radiation medium coating device in Embodiment 1 of this invention. It is a schematic side view which follows the VV line | wire of FIG. 4 which shows the squeegee, the handle | steering-wheel, and cam of the thermal radiation medium coating device in Embodiment 1 of this invention. It is a schematic perspective view which shows the squeegee, the squeegee frame, the fixed lid, the spring for squeegees, the handle, and the cam of the heat dissipation medium coating apparatus in the first embodiment of the present invention. It is a schematic perspective view which shows the flame | frame, mask, squeegee, and handle | steering-wheel of the thermal radiation medium coating device in Embodiment 1 of this invention. It is a schematic side view which shows the 1st state of the mask of the thermal radiation medium coating device in Embodiment 1 of this invention, a squeegee, and a handle. It is a schematic side view which shows the 2nd state of the mask of the thermal radiation medium coating device in Embodiment 1 of this invention, a squeegee, and a handle. It is a schematic side view which shows the 3rd state of the mask of the thermal radiation medium coating device in Embodiment 1 of this invention, a squeegee, and a handle. It is a schematic side view which shows the 4th state of the mask of the thermal radiation medium coating device in Embodiment 1 of this invention, a squeegee, and a handle. It is a schematic side view which shows the 5th state of the mask of the thermal radiation medium coating device in Embodiment 1 of this invention, a squeegee, and a handle. It is a schematic side view which shows the 6th state of the mask, squeegee, and handle | steering-wheel of the thermal radiation medium coating device in Embodiment 1 of this invention. It is a schematic perspective view which shows the state by which the thermal radiation medium was apply | coated to the thermal radiation unit in the thermal radiation medium coating device in Embodiment 1 of this invention. It is a schematic perspective view of the braid | blade of the thermal radiation medium coating device in Embodiment 2 of this invention. It is a schematic perspective view of the braid | blade of the thermal radiation medium coating device in Embodiment 2 of this invention. It is a schematic perspective view of the holding plate vicinity of the heat radiating medium coating device in Embodiment 3 of this invention. It is a schematic front view which shows the vicinity of the nut attached to the squeegee shaft of the thermal radiation medium coating device in Embodiment 1 of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
First, the configuration of the heat dissipation medium coating apparatus according to Embodiment 1 of the present invention will be described.

  With reference to FIG. 1, the heat dissipation medium coating apparatus 1 of the present embodiment mainly includes a frame 2, a mask 3, a squeegee frame 6, a squeegee 8, and an urging member 10.

  The frame 2 is composed of a frame. A mask 3 is supported inside the frame body of the frame 2. An opening 4 is formed in the mask 3. A set of linear guides 5 is arranged on the upper surface of the frame 2 so as to be parallel to each other. Each linear guide 5 is formed in a rectangular parallelepiped shape having the same dimensions. Each linear guide 5 is disposed such that the opposing surface of each linear guide 5 is flush with the inner side surface of the frame body of the frame 2.

  A set of squeegee frames 6 is placed on the upper surface of the set of linear guides 5. The pair of squeegee frames 6 are placed so that the lower surfaces of the convex portions 20 arranged outside the squeegee frames 6 are in contact with the upper surfaces of the linear guides 5. Thereby, the squeegee frame 6 is configured to be reciprocally movable along the upper surface of the linear guide 5. The fixed lid 14 is attached to the upper part of each squeegee frame 6. A squeegee 8 is mounted between the squeegee frames 6 so as to be movable up and down.

  The squeegee 8 includes two squeegee members 81 and 82. The squeegee members 81 and 82 are arranged side by side in the extending direction of the linear guide 5. Adjacent squeegee members 81 and 82 are configured to alternately move up and down by operation of the handle 7 as described later. Three squeegee shafts 19 are fixed to the upper surfaces of the squeegee members 81 and 82, respectively.

  Each squeegee shaft 19 is configured to move up and down in a hole for accommodating the squeegee shaft 19 formed in the fixed lid 14 as the squeegee members 81 and 82 move up and down. A squeegee spring (biasing member) 10 is attached around each squeegee shaft 19 between the upper surfaces of the squeegee members 81 and 82 and the lower surface of the fixed lid 14. A blade 9 is formed on a portion of the squeegee 8 that contacts the mask 3. The squeegee spring 10 is configured to urge the blade 9 so as to contact the mask 3. The contact may be via the heat dissipation medium 12. The width of the blade 9 is formed wider than the width of the opening 4 of the mask 3.

  The pressing by the squeegee spring 10 urging the blade 9 against the mask 3 may be adjustable. For example, the pressure can be adjusted by replacing the squeegee spring 10 with a spring having a different spring constant.

  Further, for example, as shown in FIG. 19, a nut 91 or the like is attached to the squeegee shaft 19 and the position of the nut 91 is adjusted so that the squeegee spring 10 can be expanded and contracted to adjust the pressure. That is, the squeegee spring 10 is attached between the upper surface of the nut 91 attached to each squeegee shaft 19 and the lower surface of the fixed lid 14. A screw for screwing with the nut 91 is formed on the outer peripheral surface of each squeegee shaft 19. Then, by rotating the nut 91 and adjusting the position of the nut 91 (in the direction of the arrow K in the figure), the squeegee spring 10 is expanded and contracted to adjust the pressure.

  The squeegee shaft 19 may be configured to go up and down through the fixed lid 14.

  The shaft 15 is supported by the base 18. The shaft 15 is fitted so as to be inserted through holes formed in the up and down directions at the four corners of the frame 2. The compression spring 16 for the frame is attached between the lower surface of the frame 2 and the upper surface of the base 18 so as to surround the shaft 15. The frame compression spring 16 biases and supports the frame 2 in the up-and-down direction. A lifting device 17 is attached to the frame 2.

  On the base 18, the heat radiating unit 13 which is an object to be coated is placed. The heat radiating unit 13 is placed so that the coating region 11 on the surface thereof is aligned with the opening 4 of the mask 3.

  Referring to FIG. 2, two cam followers 21 are formed on both end sides on the inner upper surface of squeegee member 81. Referring to FIG. 3, two cam followers 22 are formed on the center side of the upper surface inside the squeegee member 82. 2 and 3, the cam follower 21 and the cam follower 22 are formed to have the same length.

  Referring to FIG. 4, triangular convex portions 23 are formed on both side surfaces of squeegee members 81 and 82. On the other hand, on the inner side surface of the squeegee frame 6, two triangular concave portions 24 for guiding the convex portions 23 on both side surfaces of the squeegee members 81 and 82 are formed. Each squeegee frame 6 is fixed to both ends of the back plate 25. The squeegee frames 6 are arranged at an interval equivalent to the width of the squeegee members 81 and 82 excluding the convex portions 23 on both side surfaces.

  The squeegee members 81 and 82 are attached to the squeegee frame 6 by inserting the triangular convex portions 23 on both sides thereof into the triangular concave portion 24 of the squeegee frame 6 from above as indicated by an arrow A in the figure. Yes. With this configuration, the squeegee members 81 and 82 can be moved up and down along the triangular recess 24 of the squeegee frame 6 without being detached from the squeegee frame 6. The blade 9 formed on the squeegee members 81 and 82 is formed on the outer surface of the squeegee members 81 and 82 facing each other so as to sandwich the squeegee members 81 and 82 therebetween.

  A handle 7 is rotatably installed on the squeegee frame 6. The handle 7 has a shaft portion that passes through the pair of squeegee frames 6. Cams 31 and 32 are attached to the shaft portion of the handle 7. The cam 31 is disposed below the cam follower 21 so as to press the cam follower 21. The cam 32 is disposed under the cam follower 22 so as to press the cam follower 22.

  Referring to FIGS. 5 and 6, cams 31 and 32 each have a fitting portion 33 and a curved portion (curved portion) 34. The cams 31 and 32 are fixed to the shaft portion of the handle 7 so that the fitting portion 33 is in a positional relationship shifted in the circumferential direction of the shaft portion of the handle 7. FIG. 5 shows a state in which the squeegee member 81 is positioned downward and the squeegee member 82 is positioned upward as shown in FIG. In this state, the cam follower 22 of the squeegee member 82 is supported by the cam 32 by fitting with the fitting portion 33 of the cam 32. On the other hand, the squeegee member 81 is not in contact with the cam 31. The squeegee member 81 is supported by the mask 3 when the blade 9 contacts the mask 3 (see FIG. 1).

  FIG. 6 shows a state where the squeegee member 81 is positioned upward and the squeegee member 82 is positioned downward, contrary to FIG. In this state, the cam follower 21 of the squeegee member 81 is supported by the cam 31 by fitting with the fitting portion 33 of the cam 31. On the other hand, the squeegee member 82 is not in contact with the cam 32. The squeegee member 82 is supported by the mask 3 when the blade 9 contacts the mask 3 (see FIG. 1).

  Next, with reference to FIG. 5 and FIG. 6, the operation | movement to which the squeegee members 81 and 82 raise / lower alternately with the cams 31 and 32 is demonstrated. As the handle 7 rotates, the cams 31 and 32 fixed to the shaft portion of the handle 7 rotate. When the handle 7 is rotated counterclockwise in the state shown in FIG. 5, the cam follower 22 of the squeegee member 82 is disengaged from the fitting portion 33 of the cam 32. Then, the cam follower 22 of the squeegee member 82 is lowered while being pressed by the curved portion 34 of the cam 32.

  At the same time, the cam 31 and the cam 32 are fixed to the shaft portion of the handle 7 so that the respective fitting portions 33 are displaced from each other in the rotation direction of the handle 7. Rises while being pressed by the curved portion 34 of the cam 31. Then, when the cam follower 21 is fitted to the fitting portion 33 of the cam 31, the squeegee member 81 is positioned upward. In this state, since the cam follower 22 of the squeegee member 82 is not in contact with the cam 32, the squeegee member 82 is supported by the mask 3 when the blade 9 is in contact with the mask 3 (see FIG. 1) and is positioned below. ing.

  Next, with reference to FIG. 7, an operation in which the squeegee members 81 and 82 are urged downward by the squeegee spring 10 will be described. FIG. 7 shows a state in which the squeegee member 81 is positioned downward and the squeegee member 82 is positioned upward as shown in FIG.

  As shown in FIG. 7, in this state, the squeegee spring 10 is installed between the upper surface of the squeegee member 81 and the lower surface of the fixed lid 14. Therefore, the squeegee member 81 is urged downward (in the direction of arrow B in the figure) by the urging force of the squeegee spring 10. Thereby, in addition to the weight of the squeegee member 81, the blade 9 of the squeegee member 81 is pressed against the mask 3 by the urging force of the squeegee spring 10.

  As shown in FIG. 6, when the squeegee member 81 is positioned upward and the squeegee member 82 is positioned downward, the squeegee member 82 is moved downward by the urging force of the squeegee spring 10 (arrow in FIG. 7). B direction). Accordingly, the blade 9 of the squeegee member 82 is pressed against the mask 3 by the urging force of the squeegee spring 10 in addition to the weight of the squeegee member 82.

  Next, with reference to FIG. 1, the operation | movement in which the thermal radiation medium 12 is apply | coated with the thermal radiation medium application | coating apparatus 1 is demonstrated.

  As shown in FIG. 1, the heat radiating unit 13 is placed on the base 18. At this time, the opening 4 of the mask 3 is aligned with the application region 11 on the surface of the heat dissipation unit 13. Next, the frame 2 is lowered along the shaft 15 by the lifting device 17, and the lower surface of the mask 3 comes into contact with the surface of the heat dissipation unit 13.

  In addition, the raising / lowering apparatus 17 raises / lowers the flame | frame 2 by manual, motor drive, and air drive, for example. At this time, the frame 2, the mask 3, the linear guide 5, the squeegee frame 6, the squeegee member 82, the handle 7 and the fixed portion are removed except for the squeegee member 81 that is movable in the vertical direction by the urging force of the frame compression spring 16 of the shaft 15. The weight of the lid 14 and the cams 31 and 32 is supported. Thereby, the heat radiation unit 13 is hardly subjected to a load due to its own weight.

  When the handle 7 is operated, the squeegee member 81 of the squeegee 8 is raised and the squeegee member 82 is lowered. The state in which the squeegee member 82 of the squeegee 8 is pressed against the upper surface of the mask 3 with a constant pressure due to the weight of the squeegee member 82 and the biasing force of the squeegee spring 10 is maintained. Thus, the squeegee 8 can be pressed from the upper surface of the mask 3 along the surface of the heat dissipation unit 13 aligned with the mask 3. Thereby, while the squeegee 8 is moving on the mask 3, it is possible to perform screen printing while always applying a constant load.

  A series of operations in the coating process will be described below. As shown in FIG. 8, squeezing is started when the squeegee member 81 is in contact with the mask 3 and the opening 4 of the mask 3 is positioned in front of the squeegee member 81. FIG. 8 shows only the frame 2, the mask 3, the handle 7, and the squeegee 8 for easy viewing. 9 to 14 show only the mask 3, the handle 7, and the squeegee 8 for easy viewing.

  Referring to FIG. 9, handle 7 is rotated in the forward direction (the direction of arrow C in the figure). As a result, the squeegee member 81 that has been in contact with the mask 3 is raised (in the direction of arrow D in the figure), and the squeegee member 82 is lowered (in the direction of arrow E in the figure) (first state). As a result, as shown in FIG. 10, the squeegee member 81 is positioned upward, and the blade 9 of the squeegee member 82 is positioned in contact with the mask 3 (second state).

  As shown in FIG. 11, squeezing is performed from this state in the direction of arrow F in the figure (third state). By pulling the handle 7 in the direction of arrow F in the figure, the squeegee member 82 is slid on the mask 3. At that time, the inside of the blade 9 of the squeegee member 82 grasps the heat dissipation medium 12 placed on the mask 3, and the opening 4 of the mask 3 is filled with the heat dissipation medium 12. Thereby, the heat dissipation medium 12 is applied to the application region 11 on the surface of the heat dissipation unit 13. With the opening 4 of the mask 3 positioned behind the squeegee member 82, squeezing by the squeegee member 82 is completed.

  Subsequently, the frame 2 is raised and the heat radiating unit 13 coated with the heat radiating medium 12 is taken out. Then, a new heat radiating unit 13 is placed on the base 18. Thereafter, referring to FIG. 12, handle 7 is rotated in the back direction (the direction of arrow G in the figure). As a result, the squeegee member 82 that has been in contact with the mask 3 is raised (in the direction of arrow I in the figure), and the squeegee member 81 is lowered (in the direction of arrow H in the figure) (fourth state).

  As a result, as shown in FIG. 13, the squeegee member 82 is positioned upward, and the blade 9 of the squeegee member 81 is positioned so as to contact the mask 3 (fifth state). As shown in FIG. 14, squeezing is performed from this state in the direction of arrow J (sixth state). By pulling the handle 7 in the direction of arrow J in the figure, the squeegee member 81 is slid on the mask 3. At that time, the inside of the blade 9 of the squeegee member 81 holds the heat dissipation medium 12 placed on the mask 3, and the opening 4 of the mask 3 is filled with the heat dissipation medium 12. Thereby, the heat dissipation medium 12 is applied to the application region 11 on the surface of the heat dissipation unit 13.

  With the opening 4 of the mask 3 positioned behind the squeegee member 81, the squeegeeing by the squeegee member 81 is completed. As a result, as shown in FIG. 15, the heat dissipation medium 12 is applied to the application region 11 of the second heat dissipation unit 13. In FIG. 15, only the frame 2, the mask 3, the heat radiating medium 12, and the heat radiating unit 13 are shown for easy viewing.

  By repeating the same operation as described above, the heat dissipation medium 12 is applied to the application region 11 on the surface of the heat dissipating units 13 that are sequentially placed.

  Further, in the above work, it is possible to perform squeezing by reciprocating with respect to the same heat radiating unit 13 without taking out the first heat radiating unit 13. Thereby, the filling performance to the opening 4 of the mask 3 is further improved, and the coating accuracy is improved.

Next, the effect of the heat radiating medium coating device of this embodiment will be described.
According to the heat dissipation medium coating apparatus of the present embodiment, the heat dissipation medium 12 is opened to the opening of the mask 3 by sliding the squeegee 8 with the lower surface of the mask 3 in contact with the heat dissipation unit 13 at a substantially constant pressure. 4 is filled. Thereby, the heat radiation medium 12 can be applied to the application region 11 in the heat dissipation unit 13 with a predetermined thickness so as to follow the surface thereof.

  Further, since the squeegee members 81 and 82 can be raised and lowered alternately in a series of coating operations, the heat dissipation medium 12 does not wrap around the back side (rear side) of the squeegee members 81 and 82 with respect to the moving direction of the blade 9. That is, when one squeegee member 81 moves back and forth, the heat dissipation medium 12 adheres to both surfaces of the blade 9 of the squeegee member 81 unless the direction of the squeegee member 81 is changed. On the other hand, when two squeegee members 81 and 82 are used, the heat dissipation medium can be applied using one side of each blade 9. Therefore, typically, even if the direction of the squeegee members 81 and 82 is not changed, the heat dissipation medium 12 adheres only to one side of each blade 9. Therefore, there is no need to change the orientation of the squeegee members 81 and 82, and therefore an efficient and stable continuous operation can be performed.

  Further, due to the urging force of the compression spring 16 for the frame, the mask 3 in contact with the heat radiating unit 13 is hardly subjected to pressure due to the weight of the frame 2 or the like, and deformation of the mask 3 can be suppressed. Accordingly, the life of the heat dissipation medium coating apparatus can be extended.

  Further, since the width of the blade is wider than the opening 4 of the mask 3, the heat dissipation medium 12 can be applied to the application region 11 of the heat dissipation unit 13 without a gap. Further, the mask 3 is not a mesh-shaped mask, but is an opening type mask in which the application region 11 is uniformly opened, so that the heat dissipation medium 12 can be uniformly applied. Accordingly, it is possible to prevent a gap (air layer) from being mixed when mounting electronic components or the like. Therefore, it can suppress that an electronic component etc. are damaged.

(Embodiment 2)
First, the configuration of the heat dissipation medium coating apparatus according to the second embodiment of the present invention will be described.

  Referring to FIG. 16, the heat dissipating medium coating apparatus 1 of the present embodiment is mainly different from the configuration of the first embodiment in the blades of the squeegee 8. In the heat-dissipating medium coating device 1 of the present embodiment, the end 53 that contacts the mask 3 of the blade 51 of the squeegee 8 has a ¼ circular shape in cross-sectional view.

  The blade 51 is formed of a material softer than the mask 3 such as an acrylic resin. The blade 51 may be formed of a transparent or translucent material. FIG. 17 shows a state in which wear of the bottom surface 52 of the blade 51 has progressed.

  In addition, since the structure other than this of this Embodiment is the same as that of the structure of Embodiment 1 mentioned above, about the same element, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  According to the heat dissipation medium coating apparatus 1 in the present embodiment, since it has the above-described configuration, it has the same operational effects as in the first embodiment.

  In the heat dissipation medium coating apparatus 1 of the present embodiment, since the blade 51 is a softer material than the mask 3, wear of the bottom surface 52 of the blade 51 proceeds by repeated coating. Since the end portion 53 of the blade 51 of the squeegee 8 that contacts the mask 3 has a ¼ circular shape in cross-sectional view, even if the bottom surface 52 of the blade 51 is worn, the contact surface with the heat dissipation medium 12 is Since it is a curved surface, it is easy to guide the heat radiating medium 12 to the opening 4 and it is possible to make it difficult to affect the printing finish.

  Further, even if the wear of the bottom surface 52 of the blade 51 progresses, the contact surface with the heat radiating medium 12 remains curved until the quarter circle shape disappears in a cross-sectional view, so that the number of replacements of the blade 51 can be reduced. Thus, the life of the blade 51 can be extended.

  Further, since the blade 51 is softer than the mask 3, the mask 3 is prevented from being cut. Thereby, the lifetime of the mask 3 can be extended.

  In addition, since the blade 51 is formed of a transparent or translucent material, the amount of the heat dissipation medium 12 and the application state can be easily confirmed, so that workability can be improved.

  Further, as shown in FIG. 1, when the squeegee members 81 and 82 of the squeegee 8 are arranged to face each other, the curved surfaces of the blade 51 are arranged to face each other so as to reciprocate while having the above-described effects. Can be applied. Thereby, workability | operativity of the process of apply | coating a thermal radiation medium can be improved, and productivity can be improved.

(Embodiment 3)
First, the configuration of the heat dissipation medium coating apparatus according to the third embodiment of the present invention will be described.

  Referring to FIG. 18, the heat dissipating medium coating apparatus 1 of the present embodiment is mainly different from the structure of the first embodiment in that a holding plate 61 is attached to the blade 9 of the squeegee 8. . In the heat dissipation medium coating apparatus 1 according to the present embodiment, the holding plate 61 is provided on the side surface of the end portion 53 that contacts the mask 3 of the blade 9 of the squeegee 8. The holding plate 61 is formed so as to extend in a direction in which it moves in contact with the mask 3. As a result, an internal space 62 surrounded by the blade 9 and the holding plate 61 is formed.

  According to the heat dissipation medium coating apparatus 1 in the present embodiment, since it has the above-described configuration, it has the same operational effects as in the first embodiment.

  According to the heat dissipation medium coating apparatus 1 of the present embodiment, the heat dissipation medium 12 is located outside the blade 9 and the holding plate 61 from the side of the squeegee members 81 and 82 where the blade 9 and the holding plate 61 are in contact with the mask 3. Leakage is suppressed. Therefore, the heat dissipation medium 12 filled in the internal space 62 is prevented from flowing out to a portion other than the opening 4 of the mask 3.

  The internal space 62 surrounded by the blade 9 and the holding plate 61 also serves as a space for housing the heat dissipation medium 12. Thereby, the supply mechanism of the additional heat dissipation medium 12, such as a dispenser for supplying the heat dissipation medium 12, can be eliminated.

  The blade 9 is not limited to the embodiment shown in FIG. 18 as long as it has an internal space 62 capable of receiving the coating material in the forward direction. Further, in the blade 9, as shown in the second embodiment, the end portion 53 that contacts the mask 3 of the blade 51 of the squeegee 8 may have a ¼ circular shape in a cross-sectional view. The blade 51 may be formed of a material softer than the mask 3 such as an acrylic resin. The blade 51 may be formed of a transparent material. Thereby, it can have the same effect as Embodiment 2.

  In this case, the holding plate 61 may be formed of a material softer than the mask 3 such as an acrylic resin. The holding plate 61 may be formed of a transparent material. Thereby, it is possible to more effectively have the same operational effects as those of the second embodiment.

  In addition, the structure which combined each structure of said each embodiment timely may be sufficient as the thermal radiation medium coating device of this invention.

  Each embodiment disclosed this time must be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  The present invention can be applied particularly advantageously to an apparatus for applying a heat dissipation medium to a heat dissipation unit by screen printing using a mask.

  DESCRIPTION OF SYMBOLS 1 Heat dissipation medium coating device, 2 frame, 3 mask, 4 opening part, 5 linear guide, 6 squeegee frame, 7 handle, 8 squeegee, 9,51 blade, 10 squeegee spring, 11 application | coating area, 12 heat dissipation medium, 13 heat dissipation Unit, 14 Fixed lid, 15 Shaft, 16 Frame compression spring, 17 Lifting device, 18 Base, 19 Squeegee shaft, 21, 22 Cam follower, 23 Convex part, 24 Concave part, 25 Back plate, 31, 32 Cam, 33 Fitting Part, 34 curve part, 52 bottom face, 53 end part, 61 holding plate, 62 internal space, 81, 82 squeegee member, 91 nut.

Claims (4)

A heat dissipation medium coating apparatus for applying a heat dissipation medium to the surface of an object to be coated,
Frame,
A mask supported by the frame and having an opening for exposing the surface of the object to be coated;
A squeegee frame attached to the frame for reciprocal movement;
A squeegee that is attached to the squeegee frame so as to be movable up and down, and a width of a portion in contact with the mask is wider than the opening;
An urging member that urges the squeegee to abut against the mask;
The squeegee is configured to pass over the opening by moving with the squeegee frame ;
The squeegee includes a plurality of squeegee members arranged side by side in the moving direction of the squeegee,
A heat-dissipating medium coating device, further comprising cams for alternately raising and lowering adjacent squeegee members of the plurality of squeegee members . A heat dissipation medium coating apparatus for applying a heat dissipation medium to the surface of an object to be coated,
Frame,
A mask supported by the frame and having an opening for exposing the surface of the object to be coated;
A squeegee frame attached to the frame for reciprocal movement;
A squeegee that is attached to the squeegee frame so as to be movable up and down, and a width of a portion in contact with the mask is wider than the opening;
An urging member that urges the squeegee to abut against the mask;
The squeegee is configured to pass over the opening by moving with the squeegee frame;
End of the squeegee abuts the mask has a 1/4 circular shape in cross section, the heat release medium coating apparatus. A heat dissipation medium coating apparatus for applying a heat dissipation medium to the surface of an object to be coated,
Frame,
A mask supported by the frame and having an opening for exposing the surface of the object to be coated;
A squeegee frame attached to the frame for reciprocal movement;
A squeegee that is attached to the squeegee frame so as to be movable up and down, and a width of a portion in contact with the mask is wider than the opening;
An urging member that urges the squeegee to abut against the mask;
The squeegee is configured to pass over the opening by moving with the squeegee frame;
The squeegee comprises a holding plate which extends along the moving direction of the squeegee, the heat release medium coating apparatus. The heat-radiating-medium coating device according to any one of claims 1 to 3 , further comprising a frame compression spring that biases and supports the frame in the up-and-down direction.

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