Aluminum alloy extrusion die with replaceable core

Abstract

The utility model discloses a kind of aluminium alloy extrusion dies of quick replacement die core, it is related to extrusion die field, this kind of aluminium alloy extrusion die of quick replacement die core includes shunt bridge, multiple shunt holes are formed with equiangular interval on shunt bridge, connecting protrusion is formed at the center of one side of shunt bridge, threaded hole is set up at the axis of connecting protrusion;This kind of aluminium alloy extrusion die of quick replacement die core is protected by coaxial abutting protrusion end face hard seal, circular ring convex concave labyrinth seal and circular cone surface self-tight sealing triple protection, completely block aluminum liquid intrusion thread path, radically cure bolt seizure stubbornness;Combined with the flow guide of spoiler part and die core camber surface reinforcement design, while ensuring the rigidity of connection, die core is quickly disassembled, and trial mold cycle is shortened.

Description

Technical Field

[0001] This utility model relates to the field of extrusion dies, and in particular to an aluminum alloy extrusion die with a quick-change die core. Background Technology

[0002] Aluminum alloy extrusion dies mainly consist of a flow divider bridge, die core, welding chamber, and working zone. In conventional aluminum alloy extrusion dies, the die core is integral with the flow divider bridge to ensure that the die core can withstand high extrusion pressure.

[0003] In the new product development or process research stage, it is necessary to quickly and cost-effectively replace mold cores of different shapes for multiple rounds of trial extrusion. The processing cycle of integral molds is long and the cost is high. Existing technology designs a standardized flow divider bridge base and manufactures multiple detachable mold cores of different shapes, which are connected by bolts. However, the traditional bolt connection method often has the problem of loose connection. Aluminum alloy can easily enter the threaded connection surface, causing the bolts to be wrapped by molten aluminum, seizing and unable to be disassembled. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, the purpose of this utility model is to provide an aluminum alloy extrusion die with a quick-change die core, which solves the problem that the existing die core connection method is not tight, and aluminum alloy is easy to enter the threaded connection surface, resulting in the die core being unable to be disassembled.

[0005] To address the problems in the existing technology, the technical solution of this utility model is as follows:

[0006] An aluminum alloy extrusion die with a quick-change die core includes a flow divider bridge with multiple flow divider holes spaced at equal angles on the flow divider bridge. A connecting protrusion is formed at the center of one side of the flow divider bridge, and a threaded hole is provided at the axis of the connecting protrusion. A die core is provided on the side of the flow divider bridge near the connecting protrusion. A screw is fixed in the middle of one side of the die core and threaded into the threaded hole. The side of the die core near the screw abuts against the end of the connecting protrusion.

[0007] Optionally, a clamping protrusion is formed in the middle of the mold core near the connecting protrusion. The axis of the clamping protrusion coincides with the axis of the connecting protrusion. The screw is fixed on the side of the clamping protrusion near the connecting protrusion. The clamping protrusion abuts against the surface of the connecting protrusion. The diameter of the clamping protrusion near the connecting protrusion is smaller than the diameter of the connecting protrusion near the clamping protrusion.

[0008] Optionally, a turbulence portion is formed on the circumferential sidewall of the end of the connecting protrusion near the abutting protrusion, protruding outward from the abutting protrusion. The outer side of the turbulence portion is arc-shaped, and the upper and lower parts of the turbulence portion are smoothly transitioned at the positions where they connect with the outer wall of the connecting protrusion. Multiple annular protrusions are formed on the side of the abutting protrusion near the connecting protrusion. The multiple annular protrusions are arranged outward from the center of the abutting protrusion near the connecting protrusion. An annular groove is formed on the side of the connecting protrusion near the annular protrusions, and the annular protrusions abut against the annular groove.

[0009] Optionally, the connection between the abutting protrusion and the mold core is arc-shaped, and the outer edge of the mold core near the abutting protrusion is arc-shaped, with the arc extending around the mold core, and the upper edge of the arc smoothly transitioning to the connection between the abutting protrusion and the mold core.

[0010] Optionally, a frustum-shaped sealing protrusion is formed in the middle of the abutting protrusion near the screw. The sealing protrusion is tapered from the abutting protrusion to the screw and surrounds the screw. The sealing protrusion is located inside the innermost annular protrusion. A sealing groove adapted to the sealing protrusion is formed on the connecting protrusion near the screw. The sealing groove is connected to the threaded hole. When the mold core is connected to the flow divider bridge, the circumferential sidewall of the sealing protrusion abuts against the inner wall of the sealing groove.

[0011] Compared with the prior art, the advantages of this utility model are as follows:

[0012] 1. This utility model achieves a rapid connection by setting a connecting protrusion and its axial threaded hole on the side of the flow divider welding chamber, and cooperating with the clamping protrusion structure of the mold core with screw. It utilizes the triple protection of the turbulence part, the labyrinth sealing structure of the annular convex groove and the self-tightening seal of the frustum cone surface to effectively block the aluminum liquid penetration path, effectively solve the problem of bolt seizing caused by aluminum liquid wrapping around the bolt, and significantly improve the core changing efficiency during the trial molding stage.

[0013] 2. By setting up the annular protrusion, the annular groove and the frustum-shaped conical surface, this utility model can not only enhance the sealing effect, but also make the connecting protrusion and the abutting protrusion fit together to form a tenon and mortise connection, which enhances the shear rigidity of the abutting protrusion and the connecting protrusion and improves the ability of the mold core to resist radial displacement. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the threaded hole structure of this utility model.

[0016] Figure 3 This is a schematic diagram of the screw structure of this utility model.

[0017] Reference numerals: 1. Diverter bridge; 2. Diverter hole; 3. Connecting protrusion; 4. Threaded hole; 5. Mold core; 6. Abutting protrusion; 7. Screw; 8. Turbulence part; 9. Circular protrusion; 10. Circular groove; 11. Sealing protrusion; 12. Sealing groove. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Please see Figures 1 to 3 This embodiment provides an aluminum alloy extrusion die with a quick-change die core 5, including a flow divider bridge 1. Multiple flow divider holes 2 are formed on the flow divider bridge 1 at equal angular intervals. A connecting protrusion 3 is formed at the center of one side of the flow divider bridge 1. A threaded hole 4 is opened at the axis of the connecting protrusion 3. A die core 5 is provided on the side of the flow divider bridge 1 near the connecting protrusion 3. In the new product development stage, by setting a standardized flow divider bridge 1, it is convenient to connect and install various different die cores 5.

[0020] A clamping protrusion 6 is formed in the middle of the mold core 5 near the connecting protrusion 3. The connection between the clamping protrusion 6 and the mold core 5 is arc-shaped. The axis of the clamping protrusion 6 coincides with the axis of the connecting protrusion 3. A screw 7 is fixed on the side of the clamping protrusion 6 near the connecting protrusion 3. The clamping protrusion 6 abuts against the surface of the connecting protrusion 3. The screw 7 is threaded into the threaded hole 4. The diameter of the side of the clamping protrusion 6 near the connecting protrusion 3 is smaller than the diameter of the side of the connecting protrusion 3 near the clamping protrusion 6, ensuring coaxiality and forming an end face sealing barrier. The coincidence of the axes ensures alignment. The diameter difference makes the clamping protrusion 6 completely embedded in the end face of the connecting protrusion 3, forming a metal hard seal to isolate the aluminum liquid.

[0021] A turbulence-disrupting part 8 is formed on the circumferential sidewall of the end of the connecting protrusion 3 near the end of the abutting protrusion 6, protruding outward from the abutting protrusion 6. The outer side of the turbulence-disrupting part 8 is arc-shaped, and the upper and lower parts of the turbulence-disrupting part 8 are smoothly transitioned at the joints with the outer wall of the connecting protrusion 3, thereby changing the flow direction of the aluminum liquid and reducing the risk of seepage. The specific process is as follows: the filtrate enters the diversion hole 2 from the liquid inlet end of the diversion bridge 1, passes through multiple diversion holes 2 and reaches the welding chamber for fusion. The welding chamber is located on one side of the mold core 5, and then flows around the mold core 5 and is extruded and formed. During this process, the arc-shaped turbulence-disrupting part 8 guides the aluminum liquid to smoothly bypass the connection area, avoiding eddies or direct scouring of the sealing surface.

[0022] The outer edge of the mold core 5 near the abutment protrusion 6 is set with an arc surface. The arc surface extends around the mold core 5, and the upper edge of the arc surface smoothly transitions to the connection between the abutment protrusion 6 and the mold core 5. The arc surface design reduces stress concentration, improves bending resistance, makes the aluminum liquid transition more smoothly, enhances the root strength of the mold core 5, and optimizes metal flow.

[0023] Multiple annular protrusions 9 are formed on the side of the pressing protrusion 6 near the connecting protrusion 3. The multiple annular protrusions 9 are arranged outward from the center of the pressing protrusion 6 near the connecting protrusion 3. An annular groove 10 is formed on the side of the connecting protrusion 3 near the annular protrusions 9. The annular protrusions 9 abut against the annular groove 10. The annular protrusions and grooves are tightly interlocked to form a tortuous path, which greatly increases the lateral penetration resistance of the aluminum liquid and achieves a multi-maze seal.

[0024] A frustum-shaped sealing protrusion 11 is formed in the middle of the side of the clamping protrusion 6 near the screw 7. The sealing protrusion 11 is set with a reduced diameter from the side of the clamping protrusion 6 to the side of the screw 7, and the sealing protrusion 11 is arranged around the screw 7. The sealing protrusion 11 is located inside the innermost annular protrusion 9. A sealing groove 12 adapted to the sealing protrusion 11 is formed on the side of the connecting protrusion 3 near the screw 7. The sealing groove 12 is connected to the threaded hole 4. When the mold core 5 is connected to the diverter bridge 1, the circumferential sidewall of the sealing protrusion 11 abuts against the inner wall of the sealing groove 12. The frustum-shaped conical surface is pressed and radially abuts against the sealing groove 12, which is interference fit with the sealing groove 12, completely locking the last path of aluminum liquid intrusion into the root of the screw 7, and forming a dynamic self-tightening seal at the thread inlet.

[0025] Compared with existing bolt connection technology, this utility model completely blocks the path of aluminum liquid intrusion into the thread through triple protection of coaxial tight-fitting protrusion 6 end face hard seal, circular convex-concave labyrinth seal and frustum conical surface self-tightening seal, thus eradicating the stubborn problem of bolt seizing; combined with the flow guide of the turbulence part 8 and the arc surface reinforcement design of the mold core 5, it can achieve quick disassembly and assembly of the mold core 5 while ensuring connection rigidity, thus shortening the trial molding cycle.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An aluminum alloy extrusion die with a quick-change die core, comprising a flow divider bridge (1), wherein a plurality of flow divider holes (2) are formed on the flow divider bridge (1) at equal angular intervals, characterized in that, A connecting protrusion (3) is formed at the center of one side of the diversion bridge (1). A threaded hole (4) is provided at the axis of the connecting protrusion (3). A mold core (5) is provided on the side of the diversion bridge (1) near the connecting protrusion (3). A screw (7) is fixed in the middle of one side of the mold core (5). The screw (7) is threaded into the threaded hole (4). The side of the mold core (5) near the screw (7) abuts against the end of the connecting protrusion (3).

2. The aluminum alloy extrusion die with quick-change die core according to claim 1, characterized in that, The core (5) has a pressing protrusion (6) formed in the middle of the side near the connecting protrusion (3). The axis of the pressing protrusion (6) coincides with the axis of the connecting protrusion (3). The screw (7) is fixed on the side of the pressing protrusion (6) near the connecting protrusion (3). The pressing protrusion (6) abuts against the surface of the connecting protrusion (3).

3. The aluminum alloy extrusion die with quick-change die core according to claim 2, characterized in that, The diameter of the abutting protrusion (6) on the side near the connecting protrusion (3) is smaller than the diameter of the connecting protrusion (3) on the side near the abutting protrusion (6).

4. The aluminum alloy extrusion die with quick-change die core according to claim 3, characterized in that, On the circumferential sidewall of the end of the connecting protrusion (3) near the abutting protrusion (6), there is a turbulence part (8) that protrudes outward toward the abutting protrusion (6). The outer side of the turbulence part (8) is arc-shaped, and the upper and lower parts of the turbulence part (8) are smoothly connected to the outer wall of the connecting protrusion (3).

5. The aluminum alloy extrusion die with quick-change die core according to claim 4, characterized in that, The abutting protrusion (6) has multiple annular protrusions (9) on the side near the connecting protrusion (3). The multiple annular protrusions (9) are arranged outward from the center of the abutting protrusion (6) near the connecting protrusion (3). The connecting protrusion (3) has an annular groove (10) on the side near the annular protrusions (9). The annular protrusions (9) abut against the annular groove (10).

6. The aluminum alloy extrusion die with quick-change die core according to claim 2, characterized in that, The connection between the abutting protrusion (6) and the mold core (5) is arc-shaped.

7. The aluminum alloy extrusion die with quick-change die core according to claim 6, characterized in that, The outer edge of the mold core (5) near the abutting protrusion (6) is arc-shaped, and the arc extends around the mold core (5). The upper edge of the arc smoothly transitions to the connection between the abutting protrusion (6) and the mold core (5).

8. The aluminum alloy extrusion die with quick-change die core according to claim 2, characterized in that, The clamping protrusion (6) has a frustum-shaped sealing protrusion (11) formed in the middle of the side near the screw (7). The sealing protrusion (11) is set with a reduced diameter from the side of the clamping protrusion (6) to the side of the screw (7), and the sealing protrusion (11) is arranged around the screw (7). The sealing protrusion (11) is located inside the innermost annular protrusion (9). The connecting protrusion (3) has a sealing groove (12) adapted to the sealing protrusion (11) on the side near the screw (7). The sealing groove (12) is connected to the threaded hole (4). When the mold core (5) is connected to the diverter bridge (1), the circumferential sidewall of the sealing protrusion (11) abuts against the inner wall of the sealing groove (12).

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