Aluminum alloy vacuum die-casting die

Abstract

The utility model belongs to the technical field of die-casting dies, and particularly relates to an aluminum alloy vacuum die-casting die which comprises a movable die and a static die which are sequentially installed from top to bottom, a forming bin used for die-casting forming of a workpiece is formed between the movable die and the static die, and an exhaust hole communicated with the forming bin is formed in the bottom of the static die. A plug, a lifting mechanism and a limiting mechanism are sequentially installed in the exhaust hole from top to bottom. The lifting mechanism is used for driving the plug to enter the exhaust hole from the forming bin and is used for communicating or plugging the exhaust hole and the forming bin; according to the vacuum die-casting machine, the plug, the lifting mechanism and the limiting mechanism are additionally arranged, when the movable die descends, gas in the forming bin is exhausted outwards through the exhaust hole, and vacuum operation is carried out on the forming bin before die-casting is carried out.

Description

Technical Field

[0001] The utility model belongs to the technical field of die-casting molds, and in particular relates to an aluminum alloy vacuum die-casting mold. Background Art

[0002] Aluminum alloy workpieces are manufactured using die-casting molds, which consist of two main parts: a fixed mold and a movable mold.

[0003] Since the existing die-casting molds do not evacuate the molding cavity, the gas in the molding cavity has a great impact on the product quality, which is mainly manifested in two aspects: (1) Formation of gas blockage - oxidation of gas and melt, as well as partial solidification of the filling melt flow, back pressure introduces die-casting process defects such as flow marks, underfilling, cold shut, and air entrapment, reducing the process yield of large, complex, and thin-walled die-casting parts; (2) Introduction of internal gas leading to defects - jet filling causes gas to mix into the filling melt flow, introducing process defects such as pores, shrinkage holes, and slag holes in the casting. Utility Model Content

[0004] The utility model aims to provide an aluminum alloy vacuum die-casting mold to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an aluminum alloy vacuum die-casting mold, comprising: a movable mold and a static mold installed in sequence from top to bottom, a molding chamber for die-casting a workpiece is formed between the movable mold and the static mold, a vent hole connected to the molding chamber is provided at the bottom of the static mold, and a plug, a lifting mechanism and a limiting mechanism are installed in the vent hole in sequence from top to bottom;

[0006] A lifting mechanism, the lifting mechanism is used to drive the plug from the molding chamber into the exhaust hole, and is used to penetrate or block the exhaust hole and the molding chamber;

[0007] A limiting mechanism is used to limit the plug in the exhaust hole.

[0008] Preferably, the lifting mechanism includes a first mounting frame and a guide rod that passes through and is installed on the first mounting frame. The first mounting frame is installed on the inner wall of the exhaust hole. A spring is installed between the bottom end of the guide rod and the first mounting frame, and the spring is sleeved on the guide rod.

[0009] Preferably, the limiting mechanism includes a metal block and an electromagnet, a second mounting bracket welded to the inner wall of the exhaust hole is installed at the bottom of the electromagnet, and the metal block is arranged at the bottom end of the guide rod. When the plug enters the exhaust hole, the metal block is magnetically attracted to the electromagnet.

[0010] Preferably, a pressing mechanism is installed above the movable mold, and the pressing mechanism is used to drive the movable mold to perform lifting and lowering adjustment.

[0011] Preferably, the pressing mechanism includes a top plate and a hydraulic cylinder mounted on the top plate, a bottom plate is mounted on the bottom of the static mold, columns are mounted on the four corners between the top plate and the bottom plate, a movable plate mounted on four columns is mounted on the bottom end of the hydraulic cylinder, and the top of the movable mold is mounted on the bottom of the movable plate.

[0012] Preferably, an injection tube is also installed on the movable mold, and one end of the injection tube extends into the molding chamber.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] (1) The utility model adds a plug, a lifting mechanism and a limit mechanism. When the movable mold descends, the gas in the molding chamber is discharged to the outside through the exhaust hole, thereby realizing vacuum operation of the molding chamber before die-casting.

[0015] (2) The utility model adds a guide rod, a spring and a first mounting frame, and through the elastic force of the spring, the guide rod and the first mounting frame, the plug automatically enters the molding chamber, so that the gas in the new molding chamber is discharged to the outside through the exhaust hole.

[0016] (3) The utility model adds a metal block and an electromagnet. When the plug is blocked in the exhaust hole, the electromagnet absorbs the metal block to prevent the raw material from entering the molding bin and being discharged outward through the gap between the plug and the exhaust hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of the utility model;

[0018] Figure 2 It is a cross-sectional view of the utility model;

[0019] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0020] In the figure: 1. hydraulic cylinder; 2. top plate; 3. column; 4. moving mold; 5. static mold; 6. bottom plate; 7. injection pipe; 8. movable plate; 9. molding chamber; 10. plug; 11. exhaust hole; 12. first mounting bracket; 13. spring; 14. guide rod; 15. second mounting bracket; 16. electromagnet; 17. metal block. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] refer to Figure 2 As shown, the utility model provides an aluminum alloy vacuum die-casting mold, comprising: a dynamic mold 4 and a static mold 5 installed in sequence from top to bottom, a molding chamber 9 for die-casting a workpiece is formed between the dynamic mold 4 and the static mold 5, and an exhaust hole 11 connected to the molding chamber 9 is provided at the bottom of the static mold 5, and a plug 10, a lifting mechanism and a limiting mechanism are installed in the exhaust hole 11 in sequence from top to bottom;

[0023] A lifting mechanism, the lifting mechanism is used to drive the plug 10 from the molding chamber 9 into the exhaust hole 11, and is used to penetrate or block the exhaust hole 11 and the molding chamber 9;

[0024] The limiting mechanism is used to limit the plug 10 in the exhaust hole 11.

[0025] Combination Figure 1-2 As shown, an injection pipe 7 is also installed on the movable mold 4, and one end of the injection pipe 7 extends into the molding chamber 9.

[0026] As mentioned above, when using the movable mold 4, static mold 5, exhaust hole 11, plug 10, lifting mechanism and limiting mechanism provided by the utility model, the plug 10 is lifted and installed between the molding bin 9 and the exhaust hole 11 by the lifting mechanism. When the movable mold 4 enters the molding bin 9, it drives the gas in the molding bin 9 to be discharged outward through the exhaust hole 11. When the movable mold 4 fills the molding bin 9, the plug 10 enters the exhaust hole 11. At this time, the limiting mechanism limits the plug 10 in the exhaust hole 11, and a vacuum state is formed in the molding bin 9. The raw material is injected into the molding bin 9 through the injection pipe 7. In this process, the movable mold 4 rises with the entry of the raw material, so that the molding bin 9 is always in a vacuum state during the process of the raw material entering the molding bin 9. When the raw material is injected, the movable mold 4 descends again, thereby driving the raw material to be die-cast in the molding bin 9.

[0027] In the present utility model, combined with Figure 2-3 As shown, the lifting mechanism of this embodiment includes a first mounting frame 12 and a guide rod 14 that is lifted and installed on the first mounting frame 12. The first mounting frame 12 is installed on the inner wall of the exhaust hole 11. A spring 13 is installed between the bottom end of the guide rod 14 and the first mounting frame 12, and the spring 13 is sleeved on the guide rod 14.

[0028] As mentioned above, when using the lifting mechanism provided by the utility model, the first mounting frame 12 in the lifting mechanism provides a mounting position for the guide rod 14 in the exhaust hole 11, and the guide rod 14 can be lifted and lowered on the first mounting frame 12 through the elastic force of the spring 13, so as to facilitate driving the plug 10 to be adjusted in the molding chamber 9 and the exhaust hole 11. At the same time, the elastic force of the spring 13 allows the plug 10 to always be in the molding chamber 9 during exhaust, so that the gas in the molding chamber 9 is discharged outward through the exhaust hole 11.

[0029] In the present utility model, combined with Figure 3 As shown, the limiting mechanism of this embodiment includes a metal block 17 and an electromagnet 16. A second mounting bracket 15 welded to the inner wall of the exhaust hole 11 is installed at the bottom of the electromagnet 16. The metal block 17 is arranged at the bottom end of the guide rod 14. When the plug 10 enters the exhaust hole 11, the metal block 17 is magnetically attracted to the electromagnet 16.

[0030] As mentioned above, when using the limiting mechanism provided by the utility model, when the movable mold 4 drives the plug 10 to enter the exhaust hole 11, the electromagnet 16 is energized, thereby adsorbing the metal block 17 on the electromagnet 16. At this time, the plug 10 cannot be separated from the exhaust hole 11, preventing the raw material from entering the molding chamber 9 and being discharged outward through the gap between the exhaust hole 11 and the plug 10.

[0031] In the present utility model, combined with Figure 1-2 As shown, a pressing mechanism is also installed above the movable mold 4 of this embodiment, and the pressing mechanism is used to drive the movable mold 4 to perform lifting and lowering adjustment.

[0032] Combination Figure 2 As shown, the pressing mechanism includes a top plate 2 and a hydraulic cylinder 1 installed on the top plate 2, a bottom plate 6 is installed at the bottom of the static mold 5, columns 3 are installed at the four corners between the top plate 2 and the bottom plate 6, a movable plate 8 mounted on the four columns 3 is installed at the bottom end of the hydraulic cylinder 1, and the top of the movable mold 4 is installed at the bottom of the movable plate 8.

[0033] As described above, when using the pressing mechanism provided by the utility model, the top plate 2 is suspended and installed above the static mold 5 through four columns 3, and the movable plate 8 provides an installation position for the dynamic mold 4. The hydraulic cylinder 1 can drive the movable plate 8 to be raised and lowered on the column 3, thereby driving the dynamic mold 4 to be raised and lowered on the static mold 5, and then the raw material in the molding bin 9 is die-cast in this process.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An aluminum alloy vacuum die-casting mold, characterized in that: include: A movable die (4) and a static die (5) are sequentially installed from top to bottom, a molding chamber (9) for die-casting a workpiece is formed between the movable die (4) and the static die (5), a venting hole (11) communicating with the molding chamber (9) is provided at the bottom of the static die (5), and a plug (10), a lifting mechanism and a limiting mechanism are sequentially installed in the venting hole (11) from top to bottom; A lifting mechanism, the lifting mechanism is used to drive the plug (10) from the molding chamber (9) into the exhaust hole (11), and is used to penetrate or block the exhaust hole (11) and the molding chamber (9); A limiting mechanism, wherein the limiting mechanism is used to limit the plug (10) in the exhaust hole (11).

2. The aluminum alloy vacuum die-casting mold according to claim 1, characterized in that: The lifting mechanism comprises a first mounting frame (12) and a guide rod (14) which is installed on the first mounting frame (12) for lifting, the first mounting frame (12) being installed on the inner wall of the exhaust hole (11), a spring (13) being installed between the bottom end of the guide rod (14) and the first mounting frame (12), and the spring (13) being sleeved on the guide rod (14).

3. The aluminum alloy vacuum die-casting mold according to claim 2, characterized in that: The limiting mechanism comprises a metal block (17) and an electromagnet (16), and a second mounting frame (15) welded to the inner wall of the exhaust hole (11) is mounted on the bottom of the electromagnet (16).

4. The aluminum alloy vacuum die-casting mold according to claim 1, characterized in that: A pressing mechanism is also installed above the movable mold (4), and the pressing mechanism is used to drive the movable mold (4) to perform lifting and lowering adjustments.

5. The aluminum alloy vacuum die-casting mold according to claim 4, characterized in that: The pressing mechanism comprises a top plate (2) and a hydraulic cylinder (1) mounted on the top plate (2).

6. The aluminum alloy vacuum die-casting mold according to claim 1, characterized in that: An injection pipe (7) is also installed on the movable mold (4), and one end of the injection pipe (7) extends into the molding bin (9).

7. The aluminum alloy vacuum die-casting mold according to claim 3, characterized in that: The metal block (17) is arranged at the bottom end of the guide rod (14), and when the plug (10) enters the exhaust hole (11), the metal block (17) is magnetically attracted to the electromagnet (16).

8. The aluminum alloy vacuum die-casting mold according to claim 5, characterized in that: A bottom plate (6) is installed at the bottom of the static mold (5).

9. The aluminum alloy vacuum die-casting mold according to claim 8, characterized in that: Four corners between the top plate (2) and the bottom plate (6) are equipped with columns (3).

10. The aluminum alloy vacuum die-casting mold according to claim 9, characterized in that: A movable plate (8) sleeved on four columns (3) is installed at the bottom end of the hydraulic cylinder (1), and the top of the movable mold (4) is installed at the bottom of the movable plate (8).

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