JP4519288B2 - Thermally conductive sheet sticking apparatus and thermally conductive adhesive sheet sticking method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heat conductive sheet sticking device used when sticking a heat conductive sheet to an object, and a heat conductive sheet sticking method for sticking a heat conductive sheet to a heat generating component and a heat radiating component.
[0002]
[Prior art]
Since heat-generating components (electronic components) that generate heat when used, such as CPUs, power transistors, and liquid crystals, have a property that their performance decreases as the temperature rises, heat-radiating components such as heat sinks are mounted on the surface and cooled. There are many cases. In that case, if the heat dissipation component is directly mounted on the surface of the heat-generating component, a gap is created between the heat-generating component and the heat-dissipating component, and heat conduction to the heat-dissipating component is impaired. ).
[0003]
Therefore, in order to eliminate the above problems, it is widely performed to interpose an insulating heat conductive sheet between the heat generating component and the heat radiating component. As the material of the heat conductive sheet, a material in which a heat conductive filler is blended with silicone rubber or the like is used.
[0004]
Conventionally, the mounting of the heat conductive sheet between the heat generating component and the heat radiating component is performed by first setting a heat conductive sheet composite comprising a heat conductive sheet and a release sheet laminated on one side of the heat conductive sheet to a predetermined size. Cutting and placing the heat conductive sheet composite on the heat generating component so that the heat conductive sheet is in contact with the heat generating component, and then pressing the heat conductive sheet from above the release sheet with a roll or the like to After the conductive sheet is adhered to the heat generating component, the release sheet is peeled off from the heat conductive sheet, and the heat radiation component is pressure-bonded to the surface of the heat conductive sheet exposed by the peeling.
[0005]
However, in the above conventional method, the work efficiency is poor and air is easily trapped between the heat generating component or the heat radiating component and the heat conductive sheet at the time of the work, so that the heat generating component passes through the heat conductive sheet. Heat is difficult to be transmitted to the heat dissipating component, and a problem that the desired heat dissipating effect cannot be obtained, and in the case where the heat dissipating component is a liquid crystal plate, problems such as afterimage and discoloration occur. In particular, in order to prevent the heat conductive sheet from being broken to some extent in order to prevent breakage of the heat conductive sheet due to deformation of the heat generating component and the heat radiating component, the heat generating component, Air is easily trapped between the heat dissipating component and the heat conductive sheet.
[0006]
In addition, in order to prevent air from being trapped between the heat generating component or the heat radiating component and the heat conductive sheet, a through hole, an emboss or a groove is formed in the heat conductive sheet, and the heat generating component or It has also been proposed to release air between the heat dissipating component and the heat conductive sheet, but in that case, in order to obtain a good air release effect, the number of through holes and the like formed in the heat conductive sheet As a result, the total area of all through-holes and the like increases, and the contact area between the heat-generating component and the thermal conductive sheet decreases by that area, resulting in a decrease in thermal conductivity. There is.
[0007]
[Problems to be solved by the invention]
The present invention has been made to solve the above-mentioned problem, and a heat conductive sheet is adhered and adhered to an object such as a heat-generating component and a heat-dissipating component without confining air between the object. The present invention provides a heat conductive sheet sticking apparatus and a heat conductive sheet sticking method .
[0008]
[Means for Solving the Problems]
In the invention of claim 1, a heat conductive sheet composite comprising a main body, a heat conductive sheet having adhesiveness, and a release sheet laminated on one side thereof is wound, and the use of the heat conductive sheet composite A feed roll portion that is sometimes adapted to feed out the thermally conductive sheet composite; a feed shaft portion that pivotally supports the feed roll portion on the main body portion; and the feed portion provided on the main body portion. Supporting the release sheet side of the thermally conductive sheet composite fed from the roll part for use, making the thermal conductive sheet side press-adherable to the object, and peeling the release sheet from the thermally conductive sheet adhered to the object A thermally conductive sheet affixing unit comprising a sticking peeling part, a winding roll part that winds up the peeled release sheet, and a winding shaft part that rotatably supports the winding roll part on a main body part. Equipment Each of the shaft portion for feeding and take-up shaft portion, the gear unit for adjusting the rotational direction and the rotational speed of the roll unit for feeding and take-up roll portion is provided in mesh with each other, the thermally conductive The present invention relates to a thermally conductive sheet sticking apparatus, wherein slits for cutting the sheet are formed at predetermined intervals in the length direction of the thermally conductive sheet.
[0009]
The invention of claim 2 provides an idling mechanism according to claim 1, wherein the take-up shaft is idled with respect to the take-up roll when a predetermined load or more is applied to the take-up shaft. It is characterized by being.
[0010]
Furthermore, the invention of claim 3 uses the heat conductive sheet sticking device according to claim 1 or 2 to stick the heat conductive sheet to a heat generating component and a heat dissipating component. Related to the application method.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below. FIG. 1 is a side view showing a feeding roll part side of a thermally conductive sheet sticking apparatus according to one embodiment of the present invention, FIG. 2 is a side view showing a winding roll part side of the thermally conductive sheet sticking apparatus, 3 is a front view of the heat conductive sheet sticking apparatus, FIG. 4 is a top view of the heat conductive sheet sticking apparatus, and FIG. 5 is a partial perspective view showing a heat conductive sheet composite used in the heat conductive sheet sticking apparatus. FIG. 6 is a cross-sectional view showing an idling mechanism of the thermally conductive sheet sticking device, and FIG. 7 is a view showing an example of a method for sticking a heat conductive sheet to an object using the thermally conductive sheet sticking device. is there.
[0012]
A thermal conductive sheet sticking apparatus 10 shown in FIGS. 1 to 4 is related to an embodiment of the present invention, and is used to stick an adhesive thermal conductive sheet to an object. In the following description, an example will be described in which the thermal conductive sheet is used when being attached to a heat-generating component such as a CPU, a power transistor, a liquid crystal plate, or a heat-dissipating component such as a heat sink. This heat conductive sheet sticking apparatus 10 includes a main body part 11, a feeding roll part 20, a feeding shaft part 30, a sticking and peeling part 40, a winding roll part 50, and a winding shaft part 60. It has.
[0013]
The main body portion 11 is a main body portion of the thermal conductive sheet sticking apparatus 10, and the main body portion 11 of this embodiment includes a pair of plate-like bodies 12 and 13. In the illustrated example, the release sheet 75 is disposed at the front end of the plate-like body 13 on the winding roll unit 50 side so as not to hinder the winding of the release sheet 75 by the winding roll unit 50 described later. A release sheet guiding cutout portion 14 is formed to allow passage of the sheet.
[0014]
The feed roll unit 20 is configured to wind the heat conductive sheet composite 70 when the heat conductive sheet composite 70 is used by winding the heat conductive sheet composite 70 a predetermined number of times. The delivery roll portion 20 of the embodiment is formed of a cylindrical body or a columnar body having an outward flange portion 21 on the side of the plate-like body 12, and is rotatable to the plate-like body 12 of the main body portion 11. It is attached.
[0015]
As is understood from FIG. 5, the heat conductive sheet composite 70 includes a heat conductive sheet 71 and a release sheet 75 that is detachably laminated on one surface of the heat conductive sheet composite 70. One end is wound around the delivery roll section 20 so as to be fixed to the outer peripheral surface of the delivery roll section 20. The heat conductive sheet composite 70 in this embodiment is a composite of a heat conductive sheet used when a heat radiating component or the like is attached to a heat generating component such as a liquid crystal plate or a CPU.
[0016]
The thermally conductive sheet is made of a material having adhesiveness and excellent thermal conductivity, more preferably an electrically insulating material, and a flexible adhesive material that is in close contact with the unevenness of the heat-generating component. For example, an acrylic resin, a silicone rubber, a fluorosilicone rubber filled with a heat conductive filler, or various polyurethane elastomers can be used. Particularly preferably, it is formed from a silicone gel and a heat conductive filler such as aluminum oxide, and a known material can be used.
[0017]
In the heat conductive sheet 71, slits 72 for cutting are formed at predetermined intervals in the length direction X of the heat conductive sheet 71. This makes it possible to cut the heat conductive sheet 71 very easily using the cutting slit 72 at a position where the sticking length becomes a predetermined length when the heat conductive sheet 71 described later is attached to the object. it can. The cutting slit 72 is formed on the thermally conductive sheet 71 with a cutter or the like.
[0018]
The release sheet 75 is used to hold the thermal conductive sheet 71 until it is attached to an object, and to facilitate an operation for attaching the thermal conductive sheet 71 to the object. Due to the adhesiveness of the sheet 71, the heat conductive sheet 71 is detachably laminated on one side. The release sheet 75 is made of a paper, foil, plastic film, or the like that is flexible and peelable from the heat conductive sheet 71. Further, it is desirable that the size of the release sheet 75 is the same as or larger than that of the heat conductive sheet 71.
[0019]
The feeding shaft portion 30 rotatably supports the feeding roll portion 20 on the main body portion 11, in the illustrated example, on the plate-like body 12. The delivery shaft portion 30 is provided with a gear portion 35 that adjusts the rotational direction and the rotational speed of the delivery roll portion 20. Note that one end portion (end portion opposite to the gear portion 35) 31 of the delivery shaft portion 30 is fixed to the shaft hole 22 of the delivery roll portion 20.
[0020]
The sticking / peeling part 40 is provided in the lower part on the front side of the main body part 11, and supports the peeling sheet 75 side of the thermally conductive sheet composite 70 sent out from the feeding roll part 20, thereby thermally conductive sheet 71. This is a portion where the side can be pressed and adhered to the object, and the release sheet 75 is peeled off from the heat conductive sheet 71 adhered to the object. In the embodiment, mounting notch portions 15 and 16 are formed at lower portions of the front ends of the plate-like bodies 12 and 13 of the main body portion 11, respectively, and a thin plate-like sticking is applied to the mounting notch portions 15 and 16. The peeling part 40 is fixed so as to be fitted.
[0021]
The take-up roll unit 50 is for taking up the release sheet 75 from which the thermal conductive sheet composite 70 has been peeled off. The winding roll portion 50 of the embodiment is composed of a cylindrical body or a columnar body having an outward flange portion 51 on the side of the plate-like body 13 on the one side, as in the case of the feeding roll portion 20. The take-up roll unit 50 is rotatably attached to the main body unit 11, in the illustrated example, the plate-like body 13. One end side of the release sheet 75 of the heat conductive sheet composite 70 is fixed to the outer peripheral surface of the winding roll unit 50.
[0022]
Here, the heat conductive sheet composite 70 and the release sheet 75 are installed (wound) on the delivery roll unit 20 and the take-up roll unit 50 as follows. That is, as described above, one end of the long heat conductive sheet composite 70 is fixed (adhered in this example) to the outer peripheral surface of the feed roll section 20, and the heat conductive sheet composite 70 is wound a predetermined number of times. The heat conductive sheet composite 70 is arranged on one side (the lower surface in the figure) side of the sticking / peeling part 40 so that the peeling sheet 75 is on the inside, and via the tip 41 of the sticking / peeling part 40. Then, by fixing the other end of the heat conductive sheet composite 70 (release sheet 75) to the outer peripheral surface of the winding roll unit 50, heat is generated by the rotation of the feeding roll unit 20 and the winding roll unit 50. The conductive sheet composite 70 is sent out and the release sheet 75 is wound up.
[0023]
The winding shaft portion 60 rotatably supports the winding roll portion 50 on the main body portion 11, in the illustrated example, on the plate-like body 13. The take-up shaft portion 60 is provided with a gear portion 65 for adjusting the rotation direction and the rotation speed of the take-up roll portion 50 so as to mesh with the gear portion 35 of the feed-out shaft portion 30.
[0024]
In this embodiment, the gear ratio of the gear portion 35 of the delivery shaft portion 30 and the gear portion 65 of the take-up shaft portion 60 that mesh with each other is set to 2: 1, and the outer diameter L1 of the delivery roll portion 20 is 25 mm. The outer diameter L2 of the winding roll unit 50 was 50 mm. By setting in this way, the heat conductive sheet composite 70 can be efficiently fed out and the peeled sheet 75 that has been peeled off can be continuously wound.
[0025]
In addition, if the gear ratio of each gear part 35 and 65 and the outer diameter L1 and L2 of each roll part 20 and 50 are set as mentioned above, the heat conductive sheet composite 70 wound around the delivery roll part 20 will be described. When the amount (length) is large and the amount of the release sheet 75 wound around the take-up roll unit 50 is small, that is, at the initial use of the heat conductive sheet composite 70, the delivery roll per unit time The feeding amount of the part 20 and the winding amount of the winding roll unit 50 per unit time are substantially the same. However, as the use of the heat conductive sheet composite 70 progresses, the winding amount (remaining amount) of the heat conductive sheet composite 70 in the delivery roll unit 20 decreases, and the release sheet 75 in the take-up roll unit 50 decreases. As the amount of winding increases, the outer diameter of the wound product of the heat conductive sheet composite 70 in the feeding roll unit 20 is larger than the outer diameter of the wound product of the release sheet 75 in the winding roll unit 50. As a result, the winding amount per unit time becomes larger than the feed amount per unit time, and a great load is applied to the winding shaft portion 60. When a large load is applied to the winding shaft 60 in this manner, the heat conductive sheet composite 70 or the release sheet 75 may be cut off depending on the case, or the heat conductive sheet composite 70 or the release sheet 75 may be removed. Problems such as sagging will occur.
[0026]
Therefore, in the thermal conductive sheet sticking apparatus 10, when a predetermined load or more is applied to the winding shaft portion 60, the winding shaft portion 60 is idled with respect to the winding roll portion 50. An idling mechanism is provided. In the embodiment, one end portion (end portion opposite to the gear portion 65) 61 of the take-up shaft portion 60 is press-fitted at a predetermined pressure so as to be idled in the shaft hole 52 of the take-up roll portion 50. Thus, the idling mechanism is configured. More specifically, as can be understood more easily from FIG. 6, one end 61 of the winding shaft 60 is bent (distorted), and the end 61 is rolled up. The shaft hole 52 is press-fitted. The idling mechanism is not limited to the one illustrated above, and a friction member such as rubber is interposed between the shaft hole 52 of the winding roll portion 50 and one side end portion 61 of the winding shaft portion 60. Thus, when a predetermined load or more is applied to the winding shaft portion 60, the winding shaft portion 60 may be idled.
[0027]
By providing an idling mechanism as described above, when a predetermined load or more is applied to the winding shaft portion 60, the winding shaft portion 60 is idled with respect to the winding roll portion 50, At all times, it is possible to maintain a balance between the amount of feeding per unit time and the amount of winding per unit time, and the efficiency of feeding and winding is improved, and the thermally conductive sheet composite 70 or the release sheet 75 is cut off, Generation | occurrence | production of malfunctions, such as the heat conductive sheet composite body 70 or the peeling sheet 75 loosening, can be prevented.
[0028]
Next, an example of a method of using the heat conductive sheet sticking apparatus 10 having the above structure will be described. In this example, the case where the heat conductive sheet sticking apparatus 10 is used to stick the heat conductive sheet to a heat-generating component and a heat-dissipating component will be described.
[0029]
First, as shown in FIG. 7A, the sticking / peeling portion 40 of the thermally conductive sheet sticking apparatus 10 is brought close to an object (heat generating component) 80 such as a CPU or a liquid crystal plate, and the sticking / peeling portion 40 performs sheeting. The heat conductive sheet 71 of the composite 70 is pressed and adhered to the object 80. Next, under the pressed state, as shown in (B) of the same figure, the heat conductive sheet sticking device 10 is moved relative to the object 80 so as to move, thereby the sheet composite. The drawer 70 and the feeding roll unit 20 are rotated, and thereby the thermally conductive sheet 71 of the sheet composite 70 fed out is continuously adhered to the object 80.
[0030]
Further, when the feed roll unit 20 is rotated, the take-up roll unit 50 rotates through the gear units 35 and 65 to wind up the release sheet 75, so that the heat conductive sheet adhered to the object 80 is used. The release sheet 75 is peeled off from 71, and the peeled release sheet 75 is continuously wound around the winding roll unit 50 and collected.
[0031]
The relative movement of the heat conductive sheet sticking device 10 may be such that the heat conductive sheet sticking device 10 is mechanically moved by a suitable moving device such as a slide device or the heat conductive sheet sticking device. The apparatus 10 may be moved manually. Furthermore, although the heat conductive sheet sticking apparatus 10 is moved in this example, the object 80 may be placed on a conveyor or the like, and the object 80 may be moved by the operation of the conveyor.
[0032]
When the heat conductive sheet 71 is adhered to the object 80, the heat conductive sheet 71 of the fed sheet composite 70 is adhered to the object 80 while being pressed against the object 80 by the sticking and peeling unit 40. The sheet 71 can be adhered to the object 80 without any gap, and the problem that air is trapped between the heat conductive sheet 71 and the object 80 can be solved. As a result, it is possible to prevent deterioration in performance of the heat-generating component and inhibition of thermal conductivity caused by the trapped air as described in the section of the prior art.
[0033]
When the sticking of the heat conductive sheet 71 to the place where the object 80 is to be pasted is completed, the relative movement of the heat conductive sheet sticking apparatus 10 is terminated, and the heat conductive sheet 71 is cut. In this example, the thermal conductive sheet 71 is easily cut by the cutting slit 72 of the thermal conductive sheet 71 by separating the sticking / peeling portion 40 of the thermal conductive sheet sticking apparatus 10 from the object 80.
[0034]
After that, as shown in FIG. 7C, another object 85 such as a heat radiating component is pressed against the exposed surface 73 of the heat conductive sheet 71 adhered to the object 80 to be pressure bonded. The other object 85 is adhesively fixed to the heat conductive sheet 71 by this pressure bonding.
[0035]
【The invention's effect】
As shown and described above, if the thermal conductive sheet sticking device according to the present invention is used, the thermal conductive sheet is in close contact with the object and the thermal conductive sheet without being trapped in an extremely easy and continuous manner. Can be pasted on the object. In addition, the efficiency of the pasting operation is greatly improved as compared with the prior art.
[0036]
Furthermore, if the slits for cutting are formed in the thermally conductive sheet at a predetermined interval, the thermally conductive sheet can be easily cut by the slits for cutting, and the attaching operation of the thermally conductive sheet can be performed more smoothly. .
[0037]
Further, as in the second aspect of the invention, there is provided an idling mechanism that idles the take-up shaft portion with respect to the take-up roll portion when a predetermined load or more is applied to the take-up shaft portion. For example, the balance between the amount of feeding per unit time and the amount of winding per unit time can always be maintained, the efficiency of feeding and winding is improved, and the thermally conductive sheet composite or release sheet is cut, Problems such as loosening of the thermally conductive sheet composite or release sheet can be solved.
[0038]
Moreover, according to the heat conductive sheet sticking method using the heat conductive sheet sticking apparatus according to claim 3 , the heat conductive sheet generates heat without confining air between the heat conductive parts and the heat conductive parts. It can be attached to parts and heat dissipation parts very easily. Accordingly, it is possible to prevent the performance degradation of the heat generating component and the thermal conductivity inhibition caused by the trapped air, and to maximize the performance of the heat generating component. It is also possible to reduce the hardness of the heat conductive sheet and make it difficult to break the heat conductive sheet.
[0039]
Furthermore, in this heat conductive sheet sticking method, the heat conductive sheet can be closely adhered to the heat-generating component and the heat-dissipating component regardless of the thickness of the heat conductive sheet. A conductive sheet can be used. In addition, the thermal conductive sheet sticking device can be introduced into an assembly line for electronic components, and the operation of the thermal conductive sheet sticking device can be automated. In this case, the advantage of greatly reducing the number of sticking steps There is also.
[Brief description of the drawings]
FIG. 1 is a side view showing a delivery roll portion side of a thermally conductive sheet sticking apparatus according to one embodiment of the present invention.
FIG. 2 is a side view showing a winding roll side of the thermal conductive sheet sticking apparatus.
FIG. 3 is a front view of the thermal conductive sheet sticking device.
FIG. 4 is a top view of the heat conductive sheet sticking device.
FIG. 5 is a partial perspective view showing a heat conductive sheet composite used in the heat conductive sheet sticking apparatus.
FIG. 6 is a cross-sectional view showing an idling mechanism of the heat conductive sheet sticking device.
FIG. 7 is a diagram showing an example of a method for sticking a heat conductive sheet to an object using the heat conductive sheet sticking apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Thermal conductive sheet sticking apparatus 11 Main-body part 20 Roll part for delivery 30 Shaft part for delivery 35 Gear part of delivery shaft part 40 Adhesion peeling part 50 Winding roll part 60 Winding shaft part 65 Winding shaft part Gear part 70 Thermal conductive sheet composite 71 Thermal conductive sheet 75 Release sheet 80 Object (heat generating component)
85 Other objects (heat dissipating parts)

Claims (3)

The main body,
  A heat conductive sheet composite composed of an adhesive heat conductive sheet and a release sheet laminated on one side thereof is wound, and the heat conductive sheet composite is sent out when the heat conductive sheet composite is used. The delivered roll section,
  A feeding shaft portion that pivotally supports the feeding roll portion on the main body portion; and
  Provided on the main body part, supporting the release sheet side of the thermally conductive sheet composite delivered from the delivery roll part, enabling the thermal conductive sheet side to be pressure-adhered to the object, and adhered to the object An adhesive peeling part for peeling the release sheet from the thermally conductive sheet;
  A winding roll for winding the peeled release sheet;
  A heat conductive sheet sticking device comprising a winding shaft portion that rotatably supports the winding roll portion on a main body portion,
  Each of the feeding shaft portion and the winding shaft portion is provided with a gear portion that adjusts the rotation direction and the rotation speed of the feeding roll portion and the winding roll portion, and is engaged with each other. The thermal conductive sheet sticking apparatus, wherein the thermal conductive sheet is formed with slits for easy cutting at predetermined intervals in the length direction of the thermal conductive sheet. The idling mechanism is provided for causing the winding shaft portion to idle with respect to the winding roll portion when a predetermined load or more is applied to the winding shaft portion. Thermally conductive sheet sticking device. A heat conductive sheet sticking method using the heat conductive sheet sticking device according to claim 1 or 2, wherein the heat conductive sheet is stuck on a heat generating component and a heat radiating component.

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