TWI598513B - Fan, fan frame and method for manufacturing the fan frame - Google Patents

Description

Fan, fan frame and fan frame manufacturing method

The present invention relates to a fan for dissipating heat from an electronic component, a fan frame thereof, and a method of manufacturing the same.

Fans commonly found on the market generally include a frame that includes a bottom plate and a center column. The bottom plate and the center column are made of a metal material, and the two are combined by means of rivet riveting. The combination of the rivet riveting requires the use of a hydraulic press and a riveting jig to manually place the metal base plate and the metal center post on the riveting fixture for riveting. Precise alignment is required in the riveting process. Otherwise, the metal center column cannot be guaranteed to have high precision (for example, the verticality of the center column), so the tonnage of the hydraulic press and the precision of the riveting jig are high. The cost of manufacturing the fan frame and the entire fan is greatly increased.

In view of this, it is necessary to provide a lower cost fan frame and a method of manufacturing the same, and a fan to which the fan frame is applied.

A fan frame includes a bottom plate, a center post and a fixing portion for fixing the center post to the bottom plate, wherein the center post and the bottom plate are integrally formed with the fixing portion, and the center column and the bottom plate are made of metal Made of material, the fixing portion is made of a plastic material.

A fan includes the above fan frame and an impeller, and the impeller is received in the fan frame.

A method for manufacturing a fan frame, comprising the steps of: preparing a mold set having a mold cavity; placing a metal center column and a metal bottom plate in the mold cavity of the mold set, and then covering the mold set; The molten plastic is poured into the filling cavity of the mold set, and the central column and the bottom plate are integrally formed with the plastic; after the plastic is cooled and solidified, the mold set is opened to take out the solidified molded part, that is, A fan frame is formed in which the center column and the bottom plate are integrally formed with the plastic.

Since the fan frame of the present invention is formed by integrally molding the center column and the bottom plate with the plastic, the verticality of the center column is ensured, and the strength of the center column and the bottom plate is ensured, and the center column and the bottom plate are eliminated. The quality of the hidden dangers. Moreover, the central column and the bottom plate and the plastic integrated injection molding are easy to realize automation, improve the production efficiency, do not need to re-open the mold, redesign the riveting jig and use the hydraulic press, saving the cost of the mold and the riveting jig and the riveting cooperation The labor cost required.

100‧‧‧fan

10‧‧‧ Impeller

12‧‧·wheels

14‧‧‧ fan leaves

16‧‧‧ disc

20‧‧‧Fan frame

21‧‧‧Fan frame body

24‧‧‧floor

240‧‧‧Fixed holes

241‧‧‧air inlet

242‧‧‧Boss

243‧‧‧ first notch

245‧‧‧second notch

244‧‧‧Reinforcement Department

26‧‧‧ side panels

260‧‧‧air outlet

262‧‧‧ Housing Department

22‧‧‧ center column

220‧‧‧ accommodating slots

222‧‧‧ Body Department

224‧‧‧First connection

226‧‧‧Second connection

228‧‧‧The third connection

223‧‧‧First Step

225‧‧‧second step

229‧‧‧ convex

23‧‧‧ Fixed Department

230‧‧‧ hollow through hole

232‧‧ §

30‧‧‧Mold group

32‧‧‧infusion cavity

322‧‧‧First infusion cavity

324‧‧‧Second perfusion cavity

326‧‧‧ Third infusion cavity

34‧‧‧上模

342‧‧‧ Positioning column

36‧‧‧下模

40‧‧‧ plastic

1 is an assembled view of a preferred embodiment of a fan of the present invention.

Figure 2 is an assembled view of a frame of Figure 1.

Figure 3 is an exploded view of the fan frame of Figure 2.

Figure 4 is a cross-sectional view of the fan frame of Figure 2 taken along line IV-IV.

Figure 5 is an enlarged view of a center column of Figure 3.

Figure 6 is a partial enlarged view of a bottom plate of Figure 3.

Figure 7 is a cross-sectional view of a mold set for fabricating a fan frame.

Figure 8 is a cross-sectional view of the integrally packaged forming fan frame in which the plastic is poured into the mold set.

Referring to FIG. 1 , a fan 100 for dissipating heat from a heat-generating electronic component according to a preferred embodiment of the present invention includes an impeller 10 and a fan frame 20 . The impeller 10 is housed in the fan frame 20. In this embodiment, the fan 100 is a centrifugal fan for a notebook computer.

The impeller 10 includes a hub 12, a plurality of blades 14 extending outwardly from the outer periphery of the hub 12, and an annular disk 16 disposed at the top end of the plurality of blades 14.

Referring to FIG. 2 and FIG. 3 , the frame 20 includes a frame body 21 , a center post 22 , and a fixing portion 23 for fixing the center post 22 to the fan frame body 21 . The center post 22, the fixing portion 23, and the fan frame body 21 are integrally formed by injection molding. The hub 12 is disposed on the periphery of the center pillar 22.

Referring to FIG. 4 and FIG. 5 simultaneously, the center post 22 is made of a metal material. The center column 22 has a substantially cylindrical shape, and a central portion of the center column 22 defines a receiving groove 220 for receiving components such as bearings (not shown). The center post 22 includes a main body portion 222 , a first connecting portion 224 connected to the main body portion 222 , a second connecting portion 226 connected to the first connecting portion 224 , and a second connecting portion 226 . The third connecting portion 228. The diameter of the main body portion 222 is larger than the diameter of the first connecting portion 224, so that a first step portion 223 is formed between the main body portion 222 and the first connecting portion 224. The diameter of the first connecting portion 224 is larger than the diameter of the second connecting portion 226, so that a second step portion 225 is formed between the first connecting portion 224 and the second connecting portion 226. The diameter of the third connecting portion 228 is larger than the diameter of the second connecting portion 226, so that a third step portion is formed between the third connecting portion 228 and the second connecting portion 226. A plurality of convex portions 229 distributed in a zigzag pattern are uniformly formed on the periphery of the third connecting portion 228. The convex portion 229 is embedded in the plastic 40 for forming the fixing portion 23 during the injection molding to increase the center pillar 22 and The strength of the fixing portion 23 is combined (as shown in Fig. 8).

The fixing portion 23 is made of a plastic material. The fixing portion 23 has a hollow through hole 230 that penetrates the fixing portion 23 in the axial direction. The fixing portion 23 is sleeved and fixed to the outer periphery of the lower half of the center post 22 by the hollow through hole 230 . The bottom of the fixing portion 23 extends from the inner side wall to form an annular stop portion 232 which is just annularly fixed to the periphery of the second connecting portion 226 of the center post 22 . Since the diameter of the second connecting portion 226 is smaller than the diameters of the first connecting portion 224 and the third connecting portion 228, the blocking portion 232 of the fixing portion 23 can be sandwiched between the first connecting portion 224 and the third connecting portion 228. Therefore, the stopper portion 232 of the fixing portion 23 can axially position the center post 22 in the hollow through hole 230 of the fixing portion 23.

The frame body 21 includes a bottom plate 24 and a side plate 26 fixed to an outer edge of the bottom plate 24.

Please also refer to FIG. 6, the bottom plate 24 is made of a metal material. A circular fixing hole 240 is defined in the center of the bottom plate 24. The fixing portion 23 is fixed to the fixing hole 240 of the bottom plate 24. The bottom plate 24 defines three spaced air inlets 241 surrounding the fixing holes 240. An annular boss 242 is formed to extend upward from the edge of the fixing hole 240. Four semi-circular first notches 243 are uniformly formed on the boss 242, and the plastic 40 for forming the fixing portion 23 during the injection molding is embedded in the first notch 243 for adding the boss 242 and the fixing portion. 23 combined strength (as shown in Figure 8). The bottom plate 24 defines a semi-circular second recess 245 along the edge of the fixing hole 240. The plastic 40 for forming the fixing portion 23 during the injection molding is embedded in the second recess 245 for adding the fixing portion 23. The strength combined with the bottom plate 24 (as shown in Figure 8). A plurality of annular reinforcing portions 244 extend upwardly from the outer edge of the bottom plate 24. The reinforcing portions 244 are embedded in the plastic 40 for forming the side plates 26 during the injection molding to increase the strength of the bottom plate 24 and the side plates 26.

The side panel 26 is made of a plastic material. The side plate 26 defines a side air outlet 260. The outer wall of the side plate 26 extends four L-shaped receiving portions 262 for arranging and accommodating the wires. The two receiving portions 262 are horizontally extended from the outer wall of the side plate 26 and then bent downward, and the other two are closed. The receiving portion 262 is horizontally extended from the outer wall of the side plate 26 and then bent upward, and the upwardly bent receiving portion 262 and the downwardly bent receiving portion 262 are alternately distributed with each other.

Referring to FIG. 7 and FIG. 8 simultaneously, the manufacturing method of the above-mentioned fan frame 20 of the present invention comprises the following steps:

Step S1: preparing a mold set 30 having a filling cavity 32; specifically, the mold set 30 includes an upper mold 34 and a lower mold 36. The upper die 34 has an annular first filling cavity 322 disposed at the center of the upper die 34 and a second filling cavity 324 disposed adjacent to the periphery of the upper die 34. A positioning center pillar 342 is formed in the center of the upper mold 34, and the first filling cavity 322 is formed at the periphery of the positioning middle pillar 342. The lower die 36 has a third infusion cavity 326. The first, second, and third infusion cavities 322, 324, 326 collectively define the formation of the infusion cavity 32.

Step S2: a metal center column 22 and a metal bottom plate 24 are disposed in the filling cavity 32 of the mold set 30, and then the mold set 30 is closed; the structure of the center column 22 and the bottom plate 24 and the above embodiment The structure of the center column 22 and the bottom plate 24 is the same, and will not be described herein.

Specifically, the center post 22 is sleeved on the periphery of the positioning middle column 342 for positioning, so that the center post 22 is received in the first filling cavity 322 of the upper die 34, and the bottom plate 24 is received. In the third filling cavity 326 of the lower die 36, the upper die 34 and the lower die 36 of the die set 30 are then correspondingly covered.

Step S3: the molten plastic 40 is poured into the filling cavity 32 of the mold set 30, and the central column 22 and the bottom plate 24 are integrally formed with the plastic 40; specifically, the molten plastic 40 is filled. The filling cavity 32 is filled while being covered at the junction of the center post 22 and the bottom plate 24. The convex portion 229 of the center post 22 and the reinforcing portion 244 at the outer edge of the bottom plate 24 are embedded in the plastic 40 while the plastic 40 is buried in the first recess 243 and the second recess 245 of the bottom plate 24.

Step S4: After the plastic 40 is cooled and solidified, the mold set 30 is opened to take out the solidified molded part, that is, the fan frame 20 in which the center column 22 and the bottom plate 24 are integrally formed with the plastic 40 is obtained.

Specifically, when the plastic 40 in the filling cavity 32 of the mold set 30 is cooled and solidified, the upper mold 34 and the lower mold 36 of the mold set 30 can be opened to take out the center post 22 and the bottom plate 24 and the plastic 40 are integrally packaged. The molded frame 20 is shot. Wherein, the plastic 40 poured into the second filling cavity 324 of the upper die 34 cools and solidifies to form the side plate 26 of the fan frame 20, and is poured into the first filling cavity 322 and the lower die of the upper die 34. The plastic 40 at the junction of the third infusion cavity 326 of 36 is cooled and solidified to form a fixing portion 23 which is wrapped around the center post 22 and the bottom plate 24.

The structure of the side plate 26 and the fixing portion 23 is the same as that of the side plate 26 and the fixing portion 23 in the above embodiment, and details are not described herein again.

Since the fan frame 20 of the present invention is formed by integrally molding the center post 22 and the bottom plate 24 with the plastic 40, the verticality of the center post 22 is ensured, and the strength of the center post 22 and the bottom plate 24 is ensured. The quality hazard of the combination of the center post 22 and the bottom plate 24 is eliminated. Moreover, the central column 22 and the bottom plate 24 and the plastic 40 are integrally formed by injection molding, which is easy to realize automation, improves production efficiency, does not require re-opening, redesigns the riveting jig and the hydraulic press, thereby saving the cost of the mold and the riveting jig and The labor costs required for riveting cooperation.

It is to be understood that a person skilled in the art can make various other changes and modifications in accordance with the technical concept of the present invention, and all such changes and modifications are intended to fall within the scope of the present invention.

20‧‧‧Fan frame

21‧‧‧Fan frame body

24‧‧‧floor

241‧‧‧air inlet

26‧‧‧ side panels

260‧‧‧air outlet

262‧‧‧ Housing Department

22‧‧‧ center column

23‧‧‧ Fixed Department

Claims (8)

A fan frame comprising a bottom plate and a center column, wherein the frame further comprises: a fixing portion for fixing the center column to the bottom plate, wherein the center column and the bottom plate are integrally formed with the fixing portion The central column and the bottom plate are made of a metal material, the fixing portion is made of a plastic material, the bottom plate defines a fixing hole, the fixing portion is fixed at the fixing hole of the bottom plate, and an annular boss is The edge of the fixing hole is formed to extend upwardly, and a plurality of first notches are defined in the boss, and the first recess is embedded with a plastic for forming the fixing portion during the formation of the package, and the bottom plate is along the fixing hole A second recess is formed in the edge of the second recess, and the second recess is embedded with plastic for forming the fixing portion during the formation of the package. The fan frame according to claim 1, wherein the fixing portion has a hollow through hole, and the fixing portion is sleeved and fixed to the periphery of the center column by the hollow through hole. The fan frame of claim 2, wherein the center post includes a body portion, a first connecting portion connected to the body portion, and a second connecting portion connected to the first connecting portion a third connecting portion connected to the second connecting portion, the diameter of the second connecting portion is smaller than the diameters of the first connecting portion and the third connecting portion, and the fixing portion extends from the inner side wall to form an annular blocking portion, the blocking portion ring The second connecting portion is fixed to the center pillar and is sandwiched between the first connecting portion and the third connecting portion. The fan frame according to claim 3, wherein the third connecting portion has a plurality of convex portions distributed in a zigzag shape, and the convex portion is embedded in the plastic for forming the fixing portion during the injection molding. . The fan frame according to claim 1, wherein the fan frame further comprises a side plate fixed to an outer edge of the bottom plate, the side plate is made of a plastic material, and the outer edge of the bottom plate extends upwardly in a plurality of rings. The reinforcing portion is embedded in the plastic used to form the side panel during the injection molding. A fan comprising an impeller and a fan frame according to any one of claims 1-5, wherein the impeller is housed in the fan frame. A method of manufacturing a fan frame according to any one of claims 1-5, comprising the steps of: Preparing a mold set having a mold cavity; placing a metal center column and a metal bottom plate in the mold cavity of the mold set, and then covering the mold set; pouring the molten plastic into the mold set In the cavity, the central column and the bottom plate are integrally formed with the plastic; after the plastic is cooled and solidified, the mold group is opened to take out the solidified molded part, that is, the central column and the bottom plate are integrally packaged with the plastic. Formed fan frame. The method of manufacturing a fan frame according to claim 7, wherein the mold set includes an upper mold and a lower mold, the upper mold having a first filling cavity disposed at a center of the upper mold and adjacent to the mold a second infusion cavity disposed on a periphery of the upper mold, the lower mold having a third infusion cavity, the first, second, and third infusion cavities collectively defining the perfusion cavity, and the center post is disposed thereon In the first filling cavity of the die, the bottom plate is received in the third filling cavity of the lower die, and the plastic poured into the second filling cavity of the upper die is cooled and solidified to form one of the fan frames. The side plate forms a fixing portion after the plastic which is poured into the junction between the first filling cavity of the upper die and the third filling cavity of the lower die is cooled and solidified.