CN219357439U - Extrusion die capable of avoiding deformation of middle cantilever of profile - Google Patents
Extrusion die capable of avoiding deformation of middle cantilever of profile Download PDFInfo
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- CN219357439U CN219357439U CN202320615646.5U CN202320615646U CN219357439U CN 219357439 U CN219357439 U CN 219357439U CN 202320615646 U CN202320615646 U CN 202320615646U CN 219357439 U CN219357439 U CN 219357439U
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Abstract
The utility model relates to an extrusion die for avoiding deformation of a middle cantilever of a section bar, which is used for producing the section bar with the middle cantilever, and comprises an upper die and a lower die which are in butt joint combination in a matched manner; the lower die is provided with a concave welding chamber at the side surface of the feeding material, a through die hole is arranged in the welding chamber, and the die hole is provided with a cantilever forming part corresponding to the middle cantilever; protruding choke strips are arranged on two sides of the cantilever forming part; the middle part of the upper die is provided with a middle first-stage flow-dividing hole, a middle sinking bridge is arranged in the middle first-stage flow-dividing hole, and the middle sinking bridge divides the middle first-stage flow-dividing hole into two middle second-stage flow-dividing holes at the discharging side; the two middle secondary flow-dividing holes are arranged side by side along the length direction of the cantilever forming part. According to the scheme, better distribution of aluminum materials is achieved, the flow velocity is more uniform, the problems of cantilever deformation and wave rising in the middle of the profile are avoided, and the stability of the die and the rate of finished products of the profile are improved.
Description
Technical Field
The utility model belongs to the technical field of section extrusion dies, and particularly relates to an extrusion die capable of avoiding deformation of a section middle cantilever.
Background
The basic principle of the extrusion molding process of the aluminum profile is that a certain pressure is applied to the raw material aluminum bar to flow out from a gap between an upper die core and a lower die hole of a die, so that the profile with the required cross-section shape and size is obtained.
A conventional profile a, for example, as shown in fig. 7, has a cross-sectional shape having an elongated structure of a middle cantilever A1, and for this profile, a die designed according to a conventional extrusion die design method, for example, a structure as shown in chinese patent publication No. CN214108521U, i.e., a split hole is provided in the middle of the upper die to feed the middle portion. However, for the section bar with a longer middle cantilever, the middle cantilever is easy to deform and wave.
In addition, in the section a shown in fig. 7, since the intermediate cantilever A1 is long, the overall width is large, and the rod diameter of the raw material aluminum rod is relatively small, the feeding of the portions at both ends of the intermediate cantilever A1 is difficult. And, this both ends are cavity A2 structure, and go up the mould and correspond to be provided with less mold core, under the pressure effect of aluminium material, the mold core takes place deformation outward slope easily, leads to section bar cavity structure lateral wall too thin, the inside wall is too thick.
Therefore, for the section bar, the existing extrusion die has poor stability and low yield, and is difficult to normally produce.
Disclosure of Invention
The technical problems to be solved by the utility model are as follows: the extrusion die capable of avoiding deformation of the middle cantilever of the profile is provided, and aims at the profile with the middle cantilever, so that the deformation and wave generation conditions are prevented, and the stability and the yield of the die are improved.
According to the technical scheme of the utility model, the utility model provides an extrusion die for avoiding deformation of a middle cantilever of a section bar, which is used for producing the section bar with the middle cantilever and comprises an upper die and a lower die which are in butt joint combination in a matched manner; the lower die is provided with a concave welding chamber at the side surface of the feeding material, a through die hole is arranged in the welding chamber, and the die hole is provided with a cantilever forming part corresponding to the middle cantilever; protruding choke strips are arranged on two sides of the cantilever forming part; the middle part of the upper die is provided with a middle first-stage flow-dividing hole, a middle sinking bridge is arranged in the middle first-stage flow-dividing hole, and the middle sinking bridge divides the middle first-stage flow-dividing hole into two middle second-stage flow-dividing holes at the discharging side; the two middle secondary flow-dividing holes are arranged side by side along the length direction of the cantilever forming part.
Further, in the direction from the feed side to the discharge side, the middle primary flow-dividing aperture and the middle secondary flow-dividing aperture expand and/or tilt outwardly along the length direction of the cantilever molding.
Further, the profile is provided with a cavity at least one of the two ends of the intermediate cantilever; the upper die is provided with a die core corresponding to the cavity in a protruding manner at the discharging side; the die hole has a cavity molding portion corresponding to the cavity.
Further, an outer first-stage flow-dividing hole is formed in the feeding side surface of the upper die at the die core, an outer sinking bridge is arranged in the outer first-stage flow-dividing hole, and the outer sinking bridge divides the outer first-stage flow-dividing hole into a plurality of outer second-stage flow-dividing holes at the discharging side; the locations of the plurality of outer secondary flow apertures are disposed about the mold core.
Further, the outer primary diverting holes expand and/or incline outwardly in a direction along the feed side to the discharge side.
In one embodiment, the mold core is in a quadrilateral shape, and the number of the outer secondary flow dividing holes around the mold core is four, and the mold core is correspondingly arranged at the outer sides of four sides of the quadrilateral.
In another embodiment, the mold core is triangular, and the number of the outer secondary flow dividing holes around the mold core is three, and the outer secondary flow dividing holes are correspondingly arranged on the outer sides of three sides of the triangle.
Further, the flow blocking strip extends outside the cavity forming part.
Preferably, the lower die is sequentially provided with a first-stage empty cutter groove, a second-stage empty cutter groove and a third-stage empty cutter groove around the die hole at the discharging side.
Preferably, the die comprises a die pad, and the die pad is arranged on the discharging side of the lower die.
Compared with the prior art, the utility model has the following beneficial technical effects:
1. according to the extrusion die, the aluminum material in one diversion hole is shunted to two parallel diversion holes through the middle sinking bridge at the part corresponding to the middle cantilever, so that better distribution is realized, the aluminum material entering the forming part of the cantilever of the die hole cannot be too much or too little, the flow is more uniform, and the problems of deformation and wave rising of the middle cantilever of the profile are avoided.
2. The extrusion die of this scheme is provided with protruding choke area in orifice cantilever shaping portion both sides, and the aluminium material needs to flow and passes over the choke area and just can get into the orifice to the velocity of flow of cantilever shaping portion department has been adjusted, and makes aluminium material distribution more even, has further improved the shaping effect of cantilever part in the middle of the section bar.
3. The extrusion die of this scheme adopts the inclined flow distribution hole of from inside to outside expansion, realizes pushing the aluminium material of little stick footpath aluminium bar from inside to outside, optimizes outside feed condition, realizes that the section bar shaping is smooth, complete, non-deformable.
4. The extrusion die of this scheme is around setting up a plurality of branch flow holes around less mold core, and pressure is balanced basically around the mold core for the mold core is difficult for deformation, and stability is strong, effectively avoids the problem that the partial wall thickness appears in the section bar.
Drawings
FIG. 1 is a schematic view of an extrusion die according to an embodiment of the present utility model.
FIG. 2 is a schematic cross-sectional view of an extrusion die according to an embodiment of the present utility model.
Fig. 3 is a schematic diagram of the structure of the feeding side of the lower die in the embodiment shown in fig. 1.
Fig. 4 is a schematic structural view of the feed side of the upper die in the embodiment shown in fig. 1.
Fig. 5 is a schematic sectional view of the upper die after the observation section is moved to the discharge side with respect to fig. 4.
Fig. 6 is a schematic sectional view of the upper die after the observation section is moved to the discharge side with respect to fig. 5.
Fig. 7 is a schematic cross-sectional structure of a profile produced by the extrusion die shown in fig. 1.
Reference numerals in the drawings illustrate:
1. an upper die;
2. a lower die;
3. a welding chamber;
4. a die hole;
5. a cantilever forming part;
6. a flow blocking tape;
7. a middle first-stage flow dividing hole;
8. a middle sinking bridge;
9. a middle secondary flow dividing aperture;
10. a mold core;
11. a cavity forming part;
12. an outer first-stage flow-dividing aperture;
13. an outer side sinking bridge;
14. an outer secondary flow-dividing aperture;
15. a first-stage empty cutter groove;
16. a second-stage empty cutter groove;
17. three-stage empty knife grooves;
18. a die pad;
A. a section bar;
a1, a middle cantilever;
a2, a cavity.
Detailed Description
The utility model provides an extrusion die for avoiding deformation of a middle cantilever of a section, which aims at the section with the middle cantilever, prevents deformation and wave generation, and improves the stability and the yield of the die.
Referring to fig. 7, a typical profile applicable to the present utility model has a narrow and long middle cantilever A1 structure, and cavity A2 structures are disposed at two ends of the middle cantilever A1, the overall span is large, the middle cantilever A1 is easy to deform, and the cavities A2 at two ends are difficult to feed, so that the mold designed by the conventional method cannot normally produce such profile basically.
Referring to fig. 1 to 3, the present utility model provides an extrusion die for avoiding deformation of a cantilever in the middle of a profile, which comprises an upper die 1 and a lower die 2 that are butt-jointed in a matched manner. The direction from the feeding to the discharging of the aluminum bar is the direction from the upper die 1 to the lower die 2. The lower die 2 is provided with a concave welding chamber 3 at the side of the feeding, a through die hole 4 is arranged in the welding chamber 3, the shape of the die hole 4 is the same as the outline of the section A, and the die hole 4 is provided with a cantilever forming part 5 corresponding to the middle cantilever A1. The choke strips 6 protruding toward the feeding side are provided on both sides of the cantilever molding part 5 in the longitudinal direction, and a space for allowing aluminum material to pass through is provided between the choke strips 6 and the upper die 1. The aluminum material can enter the die hole 4 after flowing over the flow blocking belt 6, so that the flow speed of the cantilever forming part 5 is adjusted, the aluminum material is distributed more uniformly, and the forming effect of the middle cantilever A1 is improved.
The middle part of the upper die 1 is provided with a middle part first-stage flow-dividing aperture 7, a middle part sinking bridge 8 is arranged in the middle part first-stage flow-dividing aperture 7, the middle part sinking bridge 8 divides the middle part first-stage flow-dividing aperture 7 into two middle part second-stage flow-dividing apertures 9 at the discharging side, and the two middle part second-stage flow-dividing apertures 9 are arranged side by side along the length direction of the cantilever forming part 5. Compared with the prior art, the utility model arranges the sinking bridge in one diversion hole in the middle part, thereby diverting the aluminum material in the sinking bridge to two parallel diversion holes, the two middle secondary diversion holes 9 are beneficial to better controlling the flow path and flow of the aluminum material, and can be calculated and adjusted according to the need when designing the mould, thus realizing better distribution, ensuring that the flow of the aluminum material entering the cantilever forming part 5 is suitable and distributed more uniformly along the length direction of the cantilever, and further avoiding the problem of deformation of the cantilever in the middle of the section bar.
More specifically, the middle primary flow-dividing aperture 7 and the middle secondary flow-dividing aperture 9 are inclined apertures, and the middle primary flow-dividing aperture 7 and the middle secondary flow-dividing aperture 9 are outwardly expanded and/or outwardly inclined along the length direction of the cantilever forming portion 5 in the direction from the feed side to the discharge side. The aluminum bar feeding device further improves the effect of pushing aluminum materials from inside to outside, can better split aluminum bars with small bar diameters, optimizes the outer feeding condition, and realizes smooth, complete and non-deforming profile molding.
In the case of a profile having a cavity A2 on one or both sides, the upper die 1 is provided with a die core 10 protruding on the discharge side in correspondence with the cavity A2, and the die hole 4 has a cavity molding portion 11 in correspondence with the cavity A2. The feeding side of the upper die 1 is provided with an outer first-stage flow-dividing hole 12 at the die core 10, an outer sinking bridge 13 is arranged in the outer first-stage flow-dividing hole 12, the outer sinking bridge 13 divides the outer first-stage flow-dividing hole 12 into a plurality of outer second-stage flow-dividing holes 14 at the discharging side, and the positions of the plurality of outer second-stage flow-dividing holes 14 are arranged around the die core 10. Preferably, as shown in fig. 3, the choke strip 6 can be extended to the outer side of the cavity forming part 11 according to the requirement, so that the flow rate of the part of the cavity forming part 11 close to the cavity forming part 11 is adjusted and slowed down, the flow rate of the part of the cavity forming part 11 is suitable, and the forming effect of the part of the cavity forming part 11 close to the edges of the two ends is ensured.
Referring to fig. 4 to 6, three cross-sectional views of the upper mold 1 from the inlet side to the outlet side are shown in sequence. It is shown that the outer primary flow-dividing aperture 12 also takes the form of an inclined aperture, which outer primary flow-dividing aperture 12 is outwardly flared and/or outwardly inclined in the direction along the feed side to the discharge side, so that after the aluminium charge has entered, the aluminium charge is gradually pushed outwardly as the extrusion process proceeds. Then, the aluminum material is split by the outer sinking bridge 13 and enters a plurality of outer secondary flow splitting holes 14 to form a plurality of strands of aluminum material around the periphery of the mold core 10. Specifically, for example, the left mold core 10 in fig. 6 has a quadrilateral shape, and the number of outer secondary flow-dividing holes 14 around the quadrilateral shape is four, and the outer secondary flow-dividing holes are correspondingly arranged on the outer sides of four sides of the quadrilateral shape; the right mold core 10 is triangular, and the number of the outer secondary flow-dividing holes 14 around the right mold core is three, and the outer secondary flow-dividing holes are correspondingly arranged on the outer sides of three sides of the triangle. The pressure around the mold core 10 is basically balanced, so that the mold core 10 is not easy to deform, the stability is high, and the problem of deflection wall thickness of the profile is effectively avoided. And the aluminum material is split into two side-by-side middle secondary flow-dividing holes 9 by a middle sinking bridge 8. In the whole, aluminum bars enter from three diversion holes at the middle position of the feeding side of the upper die 1 shown in fig. 4, pass through the gradual pressure relief process of the surface diversion bridge and the sinking bridge with different heights, and finally are diverted to nine holes with the shape suitable for the die holes 4 shown in fig. 6, so that the optimal and reasonable distribution of aluminum materials is realized.
In a preferred embodiment, referring to fig. 2, the lower die 2 is provided with a first-stage clearance groove 15, a second-stage clearance groove 16 and a third-stage clearance groove 17 in sequence around the die hole 4 at the discharge side. The three empty knife grooves are gradually increased, preferably, the distances between the secondary empty knife groove 16 and the tertiary empty knife groove 17 relative to the outline of the die hole 4 are 5.5mm and 9.5mm respectively, and the surface extrusion mark and extrusion line generated by friction between the die and the die during profile discharging can be avoided by adopting the multi-stage empty knife mode. In addition, the die comprises a die pad 18, the die pad 18 is arranged on the discharging side of the lower die 2, the die pad 18 is provided with a through hole, the through hole is larger than the outer contour of the section bar, and the section bar can not be contacted with the die pad 18 during discharging. The purpose of the die pad 18 is to increase die rigidity and reduce elastic deformation of the die during extrusion.
Claims (10)
1. Extrusion die for avoiding deformation of a section bar intermediate cantilever, characterized in that it is used for producing a section bar (a) with an intermediate cantilever (A1), comprising an upper die (1) and a lower die (2) in butt-jointed combination in a matched manner;
the lower die (2) is provided with a concave welding chamber (3) at the side surface of the feeding material, a through die hole (4) is formed in the welding chamber (3), and the die hole (4) is provided with a cantilever forming part (5) corresponding to the middle cantilever (A1); the two sides of the cantilever forming part (5) are provided with raised flow blocking belts (6);
a middle first-stage flow-dividing hole (7) is formed in the middle of the upper die (1), a middle sinking bridge (8) is arranged in the middle first-stage flow-dividing hole (7), and the middle sinking bridge (8) divides the middle first-stage flow-dividing hole (7) into two middle second-stage flow-dividing holes (9) at the discharging side; the two middle secondary flow-dividing holes (9) are arranged side by side along the length direction of the cantilever forming part (5).
2. Extrusion die for avoiding deformation of intermediate cantilever of profile according to claim 1, characterized in that the intermediate primary flow-dividing aperture (7) and the intermediate secondary flow-dividing aperture (9) are flared and/or inclined outwardly along the length of the cantilever formation (5) in the direction from the feed side to the discharge side.
3. Extrusion die for avoiding deformation of a section bar intermediate cantilever according to claim 1, characterized in that the section bar (a) is provided with a cavity (A2) at least one of the two ends of the intermediate cantilever (A1); the upper die (1) is provided with a die core (10) corresponding to the cavity (A2) in a protruding manner at the discharging side; the die hole (4) has a cavity molding portion (11) corresponding to the cavity (A2).
4. An extrusion die for avoiding middle cantilever deformation of profile according to claim 3, characterized in that the feeding side surface of the upper die (1) is provided with an outer primary flow-dividing hole (12) at the die core (10), an outer sinking bridge (13) is arranged in the outer primary flow-dividing hole (12), and the outer sinking bridge (13) divides the outer primary flow-dividing hole (12) into a plurality of outer secondary flow-dividing holes (14) at the discharging side; a plurality of the outer secondary flow apertures (14) are positioned around the mold core (10).
5. Extrusion die for avoiding deformation of intermediate cantilever of profile according to claim 4, characterized in that the outer primary flow-dividing aperture (12) expands and/or tilts outwards in the direction from the feed side to the discharge side.
6. Extrusion die for avoiding deformation of middle cantilever of profile according to claim 4, characterized in that the die core (10) is in quadrilateral shape, and the number of the outer secondary flow-dividing holes (14) around the die core is four, and the outer secondary flow-dividing holes are correspondingly arranged at the outer sides of four sides of the quadrilateral shape.
7. Extrusion die for avoiding deformation of middle cantilever of profile according to claim 4, characterized in that the die core (10) is triangular, and the number of outer secondary flow-dividing holes (14) around the die core is three, and the outer secondary flow-dividing holes are correspondingly arranged on the outer sides of three sides of the triangle.
8. Extrusion die for avoiding intermediate cantilever deformations of profiles according to claim 4, characterized in that the flow-blocking strip (6) extends outside the cavity formation (11).
9. Extrusion die for avoiding deformation of middle cantilever of profile according to any one of claims 1-8, characterized in that the lower die (2) is provided with a primary clearance groove (15), a secondary clearance groove (16) and a tertiary clearance groove (17) around the die hole (4) in sequence at the discharge side.
10. Extrusion die for avoiding deformation of intermediate cantilever of profile according to any one of claims 1-8, further comprising a die pad (18), said die pad (18) being arranged on the discharge side of the lower die (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320615646.5U CN219357439U (en) | 2023-03-24 | 2023-03-24 | Extrusion die capable of avoiding deformation of middle cantilever of profile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320615646.5U CN219357439U (en) | 2023-03-24 | 2023-03-24 | Extrusion die capable of avoiding deformation of middle cantilever of profile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219357439U true CN219357439U (en) | 2023-07-18 |
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ID=87143836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320615646.5U Active CN219357439U (en) | 2023-03-24 | 2023-03-24 | Extrusion die capable of avoiding deformation of middle cantilever of profile |
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| Country | Link |
|---|---|
| CN (1) | CN219357439U (en) |
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2023
- 2023-03-24 CN CN202320615646.5U patent/CN219357439U/en active Active
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