Extrusion die for multi-cavity profile

Abstract

The utility model discloses an extrusion die for a multi-cavity profile, the section shape of the produced profile is provided with a middle cavity and a lower cavity adjacent to the middle cavity, and at least one of the two sides of the middle cavity is also provided with a groove; the upper die is provided with through flow dividing holes, the flow dividing holes comprise a middle flow dividing hole and peripheral flow dividing holes, and the position of the middle flow dividing hole corresponds to the position between the middle cavity and the lower cavity; the peripheral shunting holes are formed in the outer side of the middle cavity in a surrounding manner; a protruding die core is arranged on the discharging side of the upper die and comprises a middle die core body corresponding to the middle cavity and a lower die core body corresponding to the lower cavity. According to the scheme, the flow in the middle is increased, the problem that dead angles exist in small-section profiles with complex shapes is solved, the profiles can be normally produced, the yield and the quality are high, the mold is clearly and uniformly divided and matched integrally, the flow speed is convenient to adjust, and meanwhile the stability of the mold is enhanced.

Description

Technical Field

[0001] The utility model belongs to the technical field of profile extrusion dies, and in particular relates to an extrusion die for multi-cavity profiles. Background Art

[0002] There is a type of cross-sectional shape of beam profiles, such as Figure 2 As shown, the extrusion die used for extrusion molding generally adopts a split-flow combination die. The basic principle of extrusion molding is to apply a certain pressure to the raw aluminum rod so that it flows out from the die hole of the extrusion die and the gap between the die hole and the die core, thereby obtaining a profile with the desired cross-sectional shape and size. For example, Figure 2 The profile shown has a small cross-sectional shape, a complex shape, and many cavities, which makes it difficult to control the water level and feeding. For this type of profile, the upper die of the traditional design only arranges diversion holes around the middle and at the outer position of the die hole. This solution will produce a dead angle in the middle position, resulting in the profile angle of the formed profile in the groove structure being not vertical and other poor forming effects. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an extrusion die for multi-cavity profiles, solve the problem of poor molding effect of the existing scheme, increase the flow in the middle, make the flow distribution more uniform, and improve the yield rate and profile quality.

[0004] According to the technical scheme of the utility model, the utility model provides an extrusion die for multi-cavity profiles, including a matching upper die and a lower die, the cross-sectional shape of the profile produced by the extrusion die comprises a central cavity and a lower cavity adjacent to the central cavity, and at least one of the two sides of the central cavity also comprises a groove; the lower die is provided with a through die hole, the shape of the die hole matches the outer contour of the cross-sectional shape of the profile; the upper die is provided with a through diversion hole, the diversion hole comprises a central diversion hole and a peripheral diversion hole, the position of the central diversion hole corresponds to between the central cavity and the lower cavity; the peripheral diversion holes are arranged around the outer side of the central cavity; the upper die is provided with a protruding die core on the discharge side, the die core comprises a central die core corresponding to the central cavity and a lower die core corresponding to the lower cavity.

[0005] Furthermore, the feeding side of the middle mold core is a middle diverter bridge, and there is a gap between the middle diverter bridge and the lower mold core.

[0006] Furthermore, in the cross-sectional shape of the profile, there is a crossbeam between the middle cavity and the lower cavity; and the position of the gap corresponds to the crossbeam.

[0007] Furthermore, the feeding side surface of the middle shunt bridge is recessed in the feeding side surface of the upper die.

[0008] Furthermore, a recessed feed port is provided on the feed side of the upper die.

[0009] Furthermore, the feeding side surface of the middle shunt bridge is recessed into the feeding side surface of the feeding port.

[0010] Furthermore, the shape of the peripheral diversion hole is gradually expanded toward the middle in the direction from the inlet side to the outlet side.

[0011] Furthermore, the lower die is provided with a recessed primary welding chamber on the feeding side, a recessed secondary welding chamber is provided in the primary welding chamber, and the die hole is located in the secondary welding chamber.

[0012] Furthermore, the cross-sectional shape of the profile also includes an upper cavity, which is located on the side of the middle cavity away from the lower cavity; the mold core includes an upper mold core corresponding to the upper cavity; the distance between the contour of the secondary welding chamber and the mold hole is greater at the position corresponding to the upper cavity and at the position corresponding to the groove than at other positions.

[0013] Furthermore, the cross-sectional shape of the profile also has side cavities, which are located on both sides of the central cavity; the central cavity, the lower cavity and the side cavities form a groove; and the mold core includes a side mold core corresponding to the side cavity.

[0014] Compared with the prior art, the beneficial technical effects of the utility model are as follows:

[0015] The utility model discloses an extrusion die for multi-cavity profiles, which is provided with a central diversion hole in the middle, thereby increasing the flow rate in the middle and avoiding the problem of dead angles in small-section profiles with complex shapes, so that this type of profiles can be produced normally with high yield and quality. In addition, the overall diversion of the die is clear and uniform, which optimizes the difficulty of diversion drop, facilitates the adjustment of flow rate, and enhances the stability of the die. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall perspective structure of an extrusion die according to an embodiment of the utility model.

[0017] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional shape of the profile produced by the extrusion die shown.

[0018] Figure 3 yes Figure 1 Schematic diagram of the structure of the upper die in the extrusion die shown.

[0019] Figure 4 yes Figure 1 Schematic diagram of the structure of the lower die in the extrusion die shown.

[0020] Figure 5 It is a schematic diagram of the overall cross-sectional structure of an extrusion die according to an embodiment of the utility model.

[0021] Description of reference numerals in the accompanying drawings:

[0022] 1. Upper mold; 11. Central diversion hole; 12. Peripheral diversion hole; 13. Central mold core; 14. Lower mold core; 15. Central diversion bridge 16. Feed port; 17. Upper mold core; 18. Side mold core; 2. Lower mold; 21. Mold hole; 22. Primary welding chamber; 23. Secondary welding chamber; 3. Profile; 31. Central cavity; 32. Lower cavity; 33. Groove; 34. Crossbeam; 35. Upper cavity; 36. Side cavity. DETAILED DESCRIPTION

[0023] The utility model provides an extrusion die for multi-cavity profiles, which solves the problem of poor molding effect of existing solutions, increases the flow rate in the middle, makes the flow distribution more uniform, and improves the yield rate and profile quality.

[0024] The cross-sectional shape of the profile 3 produced by the extrusion die of an embodiment of the present invention is as follows: Figure 2 As shown, there is a middle cavity 31 and a lower cavity 32 adjacent to the middle cavity 31, and at least one of the two sides of the middle cavity 31 also has a groove 33 ( Figure 2 There are grooves 33 on both sides of the profile, and the cross-sectional dimension of the profile is relatively small, for example, the horizontal width dimension is about 70mm. For such a small cross-sectional profile with a complex shape, the traditional design scheme only arranges the diverter holes at the position outside the die hole, so that a dead angle is formed at the position corresponding to the profile groove 33, especially at the two right angles opposite to the inner side, which makes it difficult to feed the material, resulting in defects such as lack of material or unsatisfactory angles in the formed profile at this position. This type of profile is particularly suitable for adopting the scheme of the utility model.

[0025] See also Figures 1 to 4An extrusion die for a multi-cavity profile according to an embodiment of the utility model comprises a matching upper die 1 and a lower die 2. The lower die 2 is provided with a die hole 21 extending from the feeding side to the discharging side, and the shape of the die hole 21 matches (is consistent with) the outer contour of the cross-sectional shape of the profile 3. The upper die 1 is provided with a plurality of diverter holes extending from the feeding side to the discharging side, and the diverter holes include a middle diverter hole 11 and a peripheral diverter hole 12, and the position of the middle diverter hole 11 corresponds to between the middle cavity 31 and the lower cavity 32 (that is, corresponding to the groove 33). The peripheral diverter holes 12 are arranged around the outer side of the middle cavity 31. The upper die 1 is provided with a protruding die core on the discharging side, and the die core includes a middle die core 13 corresponding to the middle cavity 31 and a lower die core 14 corresponding to the lower cavity 32. One of the key points of improvement of this solution is that a central diversion hole 11 is added in the middle. The mold designed according to the conventional design method does not have this diversion hole; therefore, this solution increases the flow rate of aluminum material in the middle, so that there is no dead corner in the groove 33, which effectively solves the above problem.

[0026] Further preferably, the feeding side of the middle mold core 13 is a middle shunt bridge 15, and there is a gap between the middle shunt bridge 15 and the lower mold core 14. In other words, the two are disconnected and not connected, and the gap is continuous in the direction from the feeding side to the discharging side. Figure 3 , the shunt bridge between the side mold core 18 and the lower mold core 14 is connected. For mold cores at similar positions, this is a conventional design method. Based on this, the middle shunt bridge 15 can be optionally set to be connected to the lower mold core 14; and in this solution, it is preferred to completely separate the middle shunt bridge 15 from the lower mold core 14, so as to further increase the flow in the middle. In particular, Figure 2 In the cross-sectional shape of the profile 3 shown, there is a straight crossbeam 34 between the middle cavity 31 and the lower cavity 32, the groove 33 is located above the crossbeam 34, and the position of the gap corresponds to the crossbeam 34; the setting of the gap can ensure the molding effect of the middle crossbeam 34 of the profile 3.

[0027] As a supplementary note, Figure 3 The inner wall of the lower side of the middle shunt bridge 15 is, for example, inclined, so as to realize a rounded pentagonal hole on the feeding side and form a lower mold core 14 on the discharging side; Figure 5 As shown, the portion of the mold core corresponding to the mold hole 21 is a protruding working belt on all sides.

[0028] In some preferred embodiments, the feeding side of the middle shunt bridge 15 is recessed in the feeding side of the upper mold 1. In other words, the middle shunt bridge 15 is a sunken bridge, which optimizes the difficulty of the shunt drop and helps to reduce pressure, adjust flow, etc. Figure 3 , Figure 5As shown, the feeding side of the upper mold 1 is provided with a circular concave feeding port 16, so that the aluminum material can be initially depressurized before entering the diverter hole. Further preferably, the feeding side of the middle diverter bridge 15 is concave at the feeding side of the feeding port 16, which helps to prevent the middle diverter bridge 15 from being compressed and deformed. As a supplementary explanation, Figure 5 The teardrop-shaped structure in the middle is the diversion bridge.

[0029] See also Figure 3 The shape of the peripheral diversion hole 12 is gradually expanded toward the middle in the direction from the inlet side to the outlet side; Figure 3 In the figure, the solid line outline of the diverter hole is the inlet side outline, and the dotted line is the hole inner wall and the outlet side outline. This arrangement allows the aluminum material to be pushed toward the middle during the process of moving, which is beneficial to the welding and the feeding process at the die hole 21.

[0030] See also Figure 4 The lower die 2 is provided with a concave primary welding chamber 22 on the feeding side, a concave secondary welding chamber 23 is provided in the primary welding chamber 22, and the die hole 21 is located in the secondary welding chamber 23. The shape of the primary welding chamber 22 matches the outer contour of the discharge side of the outermost diverter hole, and the secondary welding chamber 23 matches the outer contour of the die hole 21. In this solution, secondary welding is formed to further ensure the welding effect, which helps to avoid defects and improve the quality of the profile.

[0031] More specifically, Figure 2 The cross-sectional shape of the profile 3 shown in the figure also has an upper cavity 35, and the upper cavity 35 is located on the side of the middle cavity 31 away from the lower cavity 32. Accordingly, the mold core includes an upper mold core 17 corresponding to the upper cavity 35. Figure 4 The distance between the contour of the secondary welding chamber 23 and the die hole 21 is greater at the position corresponding to the upper cavity 35 and at the position corresponding to the groove 33 than at other positions. At these wider positions of the secondary welding chamber 23, the flow rate can be increased. For example, for the upper cavity 35, this position far away from the center point can also obtain sufficient feed volume.

[0032] Please see again Figure 2 The cross-sectional shape of the profile 3 also has side cavities 36, which are located on both sides of the middle cavity 31; the long middle cavity 31, the larger lower cavity 32 and the smaller side cavities 36 form a groove 33. The mold core includes a side mold core 18 corresponding to the side cavity 36. This type of profile has a more complex structure and more small mold cores. It is easier to design only the diversion holes on the outside, and the requirements for the flow rate and flow distribution of the aluminum material are higher. This solution can be better applied to Figure 2The small-section profile with a complex shape shown can realize a more flexible and sophisticated flow diversion design through the design of the middle diversion hole 11 and the middle diversion bridge 15, so as to facilitate the adjustment of the flow rate.

[0033] In summary, the extrusion die for multi-cavity profiles of the utility model is provided with a central diversion hole in the middle, which increases the flow in the middle and avoids the problem of dead corners in small-section profiles with complex shapes, so that this type of profile can be produced normally with high yield and quality, and the overall diversion of the mold is clear and uniform, which optimizes the difficulty of the diversion drop, facilitates the adjustment of the flow rate, and enhances the stability of the mold.

Claims

1. An extrusion die for a multi-cavity profile, comprising a matching upper die (1) and a lower die (2), characterized in that: The cross-sectional shape of the profile (3) produced by the extrusion die comprises a middle cavity (31) and a lower cavity (32) adjacent to the middle cavity (31), and at least one of the two sides of the middle cavity (31) further comprises a groove (33); The lower die (2) is provided with a through die hole (21), and the shape of the die hole (21) matches the outer contour of the cross-sectional shape of the profile (3); The upper mold (1) is provided with through diversion holes, and the diversion holes include a middle diversion hole (11) and a peripheral diversion hole (12), and the position of the middle diversion hole (11) corresponds to between the middle cavity (31) and the lower cavity (32); the peripheral diversion holes (12) are arranged around the outer side of the middle cavity (31); the upper mold (1) is provided with a protruding mold core on the discharge side, and the mold core includes a middle mold core (13) corresponding to the middle cavity (31) and a lower mold core (14) corresponding to the lower cavity (32).

2. The extrusion die for multi-cavity profiles according to claim 1, characterized in that: The feeding side of the middle mold core (13) is a middle shunt bridge (15), and there is a gap between the middle shunt bridge (15) and the lower mold core (14).

3. The extrusion die for multi-cavity profiles according to claim 2, characterized in that: In the cross-sectional shape of the profile (3), a crossbeam (34) is provided between the middle cavity (31) and the lower cavity (32); and the position of the gap corresponds to the crossbeam (34).

4. The extrusion die for multi-cavity profiles according to claim 2, characterized in that: The feeding side surface of the middle shunt bridge (15) is recessed into the feeding side surface of the upper mold (1).

5. The extrusion die for multi-cavity profiles according to claim 2, characterized in that: A recessed feed opening (16) is provided on the feed side of the upper die (1).

6. The extrusion die for multi-cavity profiles according to claim 5, characterized in that: The feeding side surface of the middle shunt bridge (15) is recessed into the feeding side surface of the feeding port (16).

7. The extrusion die for multi-cavity profiles according to claim 1, characterized in that: The shape of the peripheral flow dividing hole (12) is such that it gradually expands toward the middle in the direction from the material inlet side to the material outlet side.

8. The extrusion die for multi-cavity profiles according to any one of claims 1 to 7, characterized in that: The lower die (2) is provided with a recessed primary welding chamber (22) on the feeding side, a recessed secondary welding chamber (23) is provided in the primary welding chamber (22), and the die hole (21) is located in the secondary welding chamber (23).

9. The extrusion die for multi-cavity profiles according to claim 8, characterized in that: The cross-sectional shape of the profile (3) also comprises an upper cavity (35), and the upper cavity (35) is located on a side of the middle cavity (31) away from the lower cavity (32); The mold core comprises an upper mold core (17) corresponding to the upper cavity (35); The distance between the contour of the secondary welding chamber (23) and the die hole (21) is greater at a position corresponding to the upper cavity (35) and at a position corresponding to the groove (33) than at other positions.

10. The extrusion die for multi-cavity profiles according to any one of claims 1 to 7, characterized in that: The cross-sectional shape of the profile (3) also comprises side cavities (36), and the side cavities (36) are located on both sides of the middle cavity (31); the middle cavity (31), the lower cavity (32) and the side cavities (36) enclose the groove (33); and the mold core comprises a side mold core (18) corresponding to the side cavity (36).

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