CN114669732B

CN114669732B - Aluminum alloy extrusion die of long fin heat radiation structure

Info

Publication number: CN114669732B
Application number: CN202210413637.8A
Authority: CN
Inventors: 国占昌
Original assignee: Ruixinchang Technology Changshu Co ltd
Current assignee: Ruixinchang Technology Changshu Co ltd
Priority date: 2022-04-15
Filing date: 2022-04-15
Publication date: 2024-07-19
Anticipated expiration: 2042-04-15
Also published as: CN114669732A

Abstract

The invention discloses an aluminum alloy extrusion die with a long fin heat dissipation structure, which comprises a pouring gate die and a forming die which are mutually overlapped, wherein the pouring gate die is provided with a pouring gate channel, the pouring gate channel comprises a straight channel close to the inlet side of the pouring gate die and a flaring channel close to the outlet side of the pouring gate die, the forming die is provided with a plurality of die fins and forming channels, the straight channel corresponds to the head positions of the die fins, the flaring slope angle of the flaring channel extending towards the root parts of the die fins is larger than the flaring slope angle extending towards the bottom side of the forming channel, a comb-shaped core plate is arranged in the pouring gate channel of the pouring gate die, a plurality of comb teeth arranged towards the forming die are arranged in the pouring gate channel of the pouring gate die, the comb teeth are clamped with the head parts of the die fins, and gaps are reserved between the root parts of the comb teeth and the end faces of the inlet side of the forming die. The invention can reduce the bending of the mold fin and improve the product quality.

Description

Aluminum alloy extrusion die of long fin heat radiation structure

Technical Field

The invention relates to an aluminum alloy product extrusion die, in particular to an aluminum alloy extrusion die with a long fin heat dissipation structure.

Background

The main purpose of the long fin heat dissipation structure is to use fins with an elongated cross section to increase the heat dissipation area as much as possible, and the gaps between the fins are also set smaller and smaller. For producing such products, die fins corresponding to gaps of the fins are required to be arranged on the extrusion die, the die fins are also long and thin in section, the distance (equal to the thickness of the radiator fins) is smaller, and high requirements are set for die design, so that the difficulty is mainly faced in considering the feeding balance of the fin structure and other parts, more aluminum alloy materials are required according to tips of the die fins, and when more aluminum alloy materials flow through the tips of the die fins, lateral acting forces are generated on the die fins, but lateral acting forces on two sides are not easy to translate, so that the die fins are easy to bend, and the quality of finished products is affected.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides an aluminum alloy extrusion die with a long fin heat dissipation structure, and aims to solve the problem that a die fin is bent under the action of flowing aluminum alloy materials.

The technical scheme of the invention is as follows: the utility model provides an aluminum alloy extrusion die of long fin heat radiation structure, includes gate mould and the shaping mould of mutual superpose, the gate mould is equipped with the runner passageway, the runner passageway is including being close to the straight passageway of gate mould's entry side and being close to the flaring passageway of gate mould's exit side, the shaping mould is equipped with a plurality of mould fins and shaping passageway, straight passageway with the head position correspondence of mould fins, the flaring passageway to the flaring slope angle that the root of mould fin extends is greater than to the flaring slope angle that the bottom side of shaping passageway extends, be equipped with the comb core in the runner passageway of gate mould, the comb core is equipped with towards a plurality of broachs that the shaping mould set up, the broach with the joint of mould fin's head, the root of broach with the entry side terminal surface of shaping mould leaves the clearance.

Further, inserting grooves are formed in the two sides of the forming channel on the forming die, side plates matched with the inserting grooves in the direction of the inserting grooves are arranged in the two sides of the comb-shaped core plate, and the side plates are inserted into the inserting grooves.

Further, V-shaped grooves are formed in the front end faces of the comb teeth, and wedges matched with the V-shaped grooves are arranged at the end portions of the die fins. When the V-shaped groove is matched with the wedge shape to enable the pouring gate die to be combined with the forming die, the comb-shaped core plate and the die fin can be easily subjected to butt joint positioning, and staggered damage is avoided.

Further, in order to ensure that the aluminum alloy material has enough flowing and uniform angle after passing over the comb-shaped core plate, the aluminum alloy material can be fully fused to form fins and simultaneously ensure that the die fins have enough stability, and the distance between the root parts of the comb teeth and the end face of the inlet side of the forming die is 5-10 mm.

Further, the depth of the V-shaped groove is 1-3 times of the thickness of the die fin.

Further, the forming die comprises a body and a plurality of plug blocks, wherein the die fins are arranged on the plug blocks, and the plug blocks are in plug fit with the body.

Further, the plug block is provided with a dovetail clamping tenon, and the thickness of the dovetail clamping tenon is smaller than that of the forming die.

Further, the thickness of the dovetail clamping tenon is 1/3-1/2 of the thickness of the forming die.

The technical scheme provided by the invention has the advantages that:

The flow velocity of the aluminum alloy material entering the root of the die fin is adjusted through the large-angle flaring slope extending to the root of the die fin, so that the aluminum alloy material is matched with the flow velocity of the aluminum alloy material forming the root of the fin, and the quality of a finished product is improved. Meanwhile, the direct impact of the aluminum alloy material on the heads of the die fins is reduced, the comb-shaped core plate and the heads of the die fins are utilized for structural reinforcement, bending of the die fin heads at the time of unequal aluminum alloy material pressure on two sides can be effectively avoided, and the accuracy of the sizes of the fins after the product is molded is further ensured.

Drawings

Fig. 1 is a schematic view of a long fin heat sink.

Fig. 2 is a schematic front view of an aluminum alloy extrusion die of a long fin heat dissipation structure.

FIG. 3 is a schematic view of section A-A of the gate mold of FIG. 2.

Fig. 4 is a schematic front view of the molding die.

Fig. 5 is a schematic view of section A-A of fig. 4.

Fig. 6 is a schematic view of section B-B of fig. 4.

Detailed Description

The present application is further described below with reference to examples, which are to be construed as merely illustrative of the present application and not limiting of its scope, and various modifications to the equivalent arrangements of the present application will become apparent to those skilled in the art upon reading the present description, which are within the scope of the application as defined in the appended claims.

Referring to fig. 1, in the long fin heat dissipation structure of the aluminum alloy extrusion die for a long fin heat dissipation structure of the embodiment of the present invention, fins 200 with elongated cross sections are sequentially arranged on a base plate 100, and gaps between the fins 200 are smaller. As shown in fig. 2 to 6, the aluminum alloy extrusion die of the long fin heat dissipation structure of the present embodiment includes a sprue die 1 and a forming die 2 stacked on each other, wherein a sprue channel 3 of the sprue die 1 initially guides an aluminum alloy material to the forming die 2, and a formed product is obtained after the aluminum alloy material is extruded from a forming channel 4 of the forming die 2.

The forming die 2 comprises a body 201 and a plurality of plug blocks 202, wherein the plug blocks 202 are made of 9Cr18 material, and nitriding treatment is carried out on the surfaces of the plug blocks, so that the heat resistance and the wear resistance of the plug blocks are improved. Each plug block 202 is provided with a plurality of mold fins 203, and gaps reserved between the mold fins 203 of the plug blocks 202 and the body 201 form a molding channel 4, and the section of the molding channel 4 is the same as the section of the long fin heat dissipation structure. The lower part of the plug-in block 202 is provided with a die fin 203, the upper part of the plug-in block 202 is provided with a dovetail clamping tenon 204, and the thickness of the dovetail clamping tenon 204 is smaller than that of the forming die 2 and is generally 1/3-1/2 of that of the forming die 2. The forming die 2 is provided with a groove with the depth corresponding to the thickness of the dovetail clamping tenon 204, and the plug block 202 is inserted from the inlet end face of the forming die 2 and keeps the end face flush.

The gate mold 1 is provided with a gate passage 3, the gate passage 3 has a flat inlet on the inlet side, the gate passage 3 is a straight passage 301 extending from the inlet directly in the thickness direction of the gate mold 1 on the inlet side near the gate mold 1, the upper and lower sides of the straight passage 301 are gradually inclined upward and downward to form a flaring passage 302 on the outlet side near the gate mold 1, and the section of the flaring passage 302 gradually reaches the size of the finished product. The position of the straight channel 301 corresponds to the position of the head of the mold fin 203 in the molding mold 2, so that feeding of bottom molding of products is guaranteed, the upper side flaring slope angle of the flaring channel 302 is larger, the lower side flaring slope angle of the opposite flaring channel 302 is smaller, and aluminum alloy materials entering from the straight channel 301 form a certain upward flow angle in the flaring channel 302.

A comb-shaped core plate 5 is arranged in a sprue channel 3 of the sprue mold 1, the comb-shaped core plate 5 is also made of 9Cr18 material, and the surface is nitrided. The comb-shaped core plate 5 is fixedly connected with the gate mould 1. The comb-shaped core plate 5 is provided with a plurality of comb teeth 501 arranged toward the forming die 2, the number of the comb teeth 501 being adapted to the number of the die fins 203 of the forming die 2, one comb tooth 501 for each die fin 203. The molding die 2 is provided with insertion grooves 205 on both sides of the molding channel 4, and the comb-shaped core plate 5 is provided with side plates 502 matching the insertion grooves 205 on both sides, and the side plates 502 are inserted into the insertion grooves 205 when the gate die 1 is matched with the molding die 2. The front end face of the comb teeth 501 is provided with a V-shaped groove, the end part of the die fin 203 is provided with a wedge-shaped matched with the V-shaped groove, and the clamping connection is completed by the head parts of the comb teeth 501 and the die fin 203 when the side plates 502 are inserted into the inserting grooves 205. The depth L2 of the V-shaped groove is 1-3 times of the thickness of the die fin 203, so that the comb teeth 501 have a reliable reinforcing effect on the die fin 203, and when an aluminum alloy material flows through two sides of the die fin 203, the die fin 203 is not easy to swing left and right due to clamping and positioning with the comb teeth 501. However, the blocking of the comb-shaped core plate 5 affects the welding of the aluminum alloy material in the molding channels between the mold fins 203, so that the comb teeth 501 themselves are not too short, a gap L1 of 5-10 mm is left between the root parts of the comb teeth 501 and the inlet side end surface of the molding mold 2, and the uniform flow angle of the aluminum alloy is ensured to perform sufficient welding.

Claims

1. The utility model provides an aluminum alloy extrusion die of long fin heat radiation structure, includes gate mould and the shaping mould of mutual superpose, its characterized in that, gate mould is equipped with the runner passageway, the runner passageway is including being close to straight passageway of entry side of gate mould and being close to the flaring passageway of entry side of gate mould, the shaping mould is equipped with a plurality of mould fins and shaping passageway, straight passageway with the head position of mould fin corresponds, flaring passageway to the root extension of mould fin flaring slope angle is greater than to the flaring slope angle of the bottom side extension of shaping passageway, be equipped with the comb type in the runner passageway of gate mould, the comb type core is equipped with towards a plurality of broachs that the shaping mould set up, the broach with the head joint of mould fin, the root of broach with the entry side terminal surface of shaping mould leaves the clearance, be located on the shaping mould the both sides of shaping passageway are equipped with the grafting groove, the both sides of comb type core be equipped with the curb plate that the grafting is to the grafting groove, the curb plate inserts the groove.

2. The aluminum alloy extrusion die of the long-fin heat dissipation structure according to claim 1, wherein the front end surfaces of the comb teeth are provided with V-shaped grooves, and the end parts of the die fins are provided with wedges matched with the V-shaped grooves.

3. The aluminum alloy extrusion die of a long fin heat dissipation structure according to claim 1, wherein a distance between the root of the comb teeth and an inlet side end face of the forming die is 5 to 10mm.

4. The aluminum alloy extrusion die of a long fin heat dissipation structure according to claim 2, wherein the depth of the V-shaped groove is 1 to 3 times the thickness of the die fin.

5. The aluminum alloy extrusion die of the long-fin heat dissipation structure according to claim 1, wherein the forming die comprises a body and a plurality of plug blocks, the die fins are arranged on the plug blocks, and the plug blocks are in plug fit with the body.

6. The aluminum alloy extrusion die of the long-fin heat dissipation structure according to claim 5, wherein the plug block is provided with a dovetail block, and the thickness of the dovetail block is smaller than that of the forming die.

7. The aluminum alloy extrusion die of a long fin heat dissipation structure as recited in claim 6, wherein the thickness of said dovetail block is 1/3-1/2 of the thickness of said forming die.