Aluminum transfer launder for high-pressure casting of molten aluminum

Abstract

The utility model belongs to the technical field of molten aluminum high-pressure casting parts, and aims to provide a rotary aluminum runner for molten aluminum high-pressure casting, which comprises a straight inflow section and an inclined outflow section, a molten aluminum inlet is arranged at the front end of the straight inflow section, and a U-shaped molten aluminum channel is arranged in the straight inflow section; the inclined outflow section is of an inclined cone structure and comprises a top large-circle structure and a bottom small-circle structure, and a molten aluminum outlet is formed in the bottom small-circle structure and connected with an external fillet. The high-pressure casting mold has the characteristics of simple structure, high strength, no aluminum adhesion, good heat preservation property and the like, and can be widely applied to the technical field of molten aluminum high-pressure casting.

Description

Technical Field

[0001] The utility model relates to the technical field of molten aluminum high pressure casting parts, in particular to an aluminum transfer flow channel for molten aluminum high pressure casting. Background Art

[0002] High pressure casting, commonly known as die casting, refers to a casting method in which molten or semi-molten metal is injected into a metal mold at high speed (the common injection pressure is 30-70 MPa) and crystallized under pressure. The characteristics of high pressure casting are: high dimensional accuracy of castings, good surface finish, high strength, and high production efficiency, but the castings have poor ductility, high mold equipment costs, and are not suitable for small batch production.

[0003] At present, the existing aluminum liquid high-pressure casting mostly adopts quantitative furnace for production to ensure that the casting is accurately cast according to the specified weight. The aluminum liquid needs to be transferred between the quantitative furnace and the die-casting machine through the flow trough and the discharge port. The conventional flow trough generally adopts a straight U-shaped structure. For example, patent numbers "201220280130.1" and "202022733435.0" both introduce aluminum liquid transfer flow troughs, which are U-shaped structures with non-stick aluminum, high temperature resistance, erosion resistance and other properties, and are equipped with an iron shell on the outside, which is suitable for aluminum liquid transfer between the insulation furnace and the casting platform. However, for the aluminum liquid transfer of high-pressure casting, the ordinary U-shaped structure flow trough needs to be combined with the discharge port to achieve the transfer to the die-casting machine, which invisibly increases the cost, and the installation and replacement are also inconvenient; in addition, due to the limitations of on-site operating conditions, the flow trough is often not equipped with an iron shell for protection. For this reason, the existing aluminum liquid high-pressure casting aluminum transfer flow trough structure needs to be further improved. Summary of the invention

[0004] The utility model aims to provide an aluminum transfer runner for aluminum liquid high pressure casting, which has the characteristics of simple structure, high strength, no aluminum sticking and good heat preservation, and can be widely used in the technical field of aluminum liquid high pressure casting.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme to implement it: an aluminum transfer flow trough for high-pressure casting of molten aluminum, including a straight-in flow section and an oblique flow section, the front end of the straight-in flow section is provided with an aluminum liquid inlet, and a U-shaped aluminum liquid channel is provided inside; the oblique flow section is in an oblique cone structure, including a large circle structure on the top and a small circle structure on the bottom, the small circle structure at the bottom is provided with an aluminum liquid outlet, and the aluminum liquid outlet is connected to the external chamfer.

[0006] As an improvement, the straight flow section has a U-shaped structure on the outside and is provided with an outer inclined surface.

[0007] As an improvement, the angle between the outer inclined surface and the horizontal direction is 40°~65°.

[0008] As an improvement, two symmetrically distributed inner bevels are provided inside the U-shaped aluminum liquid channel, and the angle between the inner bevels and the horizontal direction is 40°~65°.

[0009] As an improvement, an inner rounded corner is provided at the intersection of the inner inclined surfaces.

[0010] As an improvement, the oblique outflow section is provided with an upward inclined surface, and the angle between the upward inclined surface and the horizontal direction is 5°~25°.

[0011] As an improvement, the aluminum transfer trough is made of calcium silicate composite ceramic fiber material with a wall thickness of 10-20 mm.

[0012] As an improvement, a boron nitride coating is provided inside the aluminum conversion flow trough.

[0013] The beneficial effects of the utility model include: an aluminum transfer flow trough for high-pressure casting of aluminum liquid, which has the characteristics of simple structure, high strength, non-stick aluminum and good thermal insulation, and the like. By adopting a segmented structure of a straight-in flow section and an oblique-out flow section, and by connecting the U-shaped inlet of the quantitative furnace and inserting the oblique cone outlet of the direct die-casting machine, the aluminum liquid transfer between the quantitative furnace and the die-casting machine is realized, and the discharge port is omitted, making installation and replacement more convenient; by designing the outer part of the straight-in flow section as a U-shaped structure, the inside and outside are the same, the thickness is uniform, and the material cost is reduced at the same time; by arranging an upward inclined surface on the oblique-out flow section, the protective surface of the outlet end is improved to prevent the aluminum liquid from splashing and running out when it flows into the outlet end quickly, and to avoid the casting from lacking aluminum liquid and being unable to punch the mold; finally, by adopting a calcium silicate composite ceramic fiber material, the toughness of the aluminum transfer flow trough is increased to avoid brittle fracture due to the lack of iron shell protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view of the aluminum transfer trough for aluminum liquid high pressure casting of the utility model;

[0015] Figure 2 It is a top view of the aluminum transfer runner for aluminum liquid high pressure casting of the utility model;

[0016] Figure 3 It is an AA cross-sectional view of the aluminum transfer runner for aluminum liquid high pressure casting of the utility model.

[0017] In the figure: 1. Straight-in flow section; 2. Oblique-out flow section; 3. Aluminum liquid inlet; 4. U-shaped aluminum liquid channel; 5. Large circle structure at the top; 6. Small circle structure at the bottom; 7. Aluminum liquid outlet; 8. External chamfer; 9. External bevel; 10. Internal bevel; 11. Internal chamfer; 12. Upward bevel. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments: Figures 1 to 3As shown, the utility model is an aluminum transfer flow trough for aluminum liquid high-pressure casting, comprising a straight-in flow section 1 and an oblique-out flow section 2, wherein the straight-in flow section 1 is provided with an aluminum liquid inlet 3 at the front end, and a U-shaped aluminum liquid channel 4 is provided inside; the oblique-out flow section 2 is an oblique cone structure, comprising a top large circle structure 5 and a bottom small circle structure 6, wherein the bottom small circle structure 6 is provided with an aluminum liquid outlet 7, and the aluminum liquid outlet 7 is connected to an external chamfer 8.

[0019] Furthermore, the straight flow section 1 has a U-shaped structure on the outside and is provided with an outer bevel 9; specifically, the outer bevel 9 has an angle of 40°~65° with the horizontal direction, preferably 45°; the U-shaped structure can ensure the uniformity of the thickness of the aluminum flow channel and reduce material costs.

[0020] Furthermore, two symmetrically distributed inner bevels 10 are provided inside the U-shaped aluminum liquid channel 4, and the angle between the inner bevels 10 and the horizontal direction is 40°~65°, preferably 45°; further, an inner chamfer 11 is provided at the intersection of the inner bevels 10, and specifically, the size of the inner chamfer 11 is R5~R15mm. The setting of the inner chamfer 11 can reduce the impact of aluminum liquid, avoid serious aluminum sticking, and facilitate cleaning.

[0021] Furthermore, the inclined outflow section 2 is provided with an upward inclined surface 12, and the angle between the upward inclined surface 12 and the horizontal direction is 5°~25°, preferably 5°~15°; specifically, the upward inclined surface 12 increases the protective surface of the outflow end to prevent the aluminum liquid from splashing and running out when it flows into the outflow end quickly.

[0022] Furthermore, the aluminum-converting flow trough is made of calcium silicate composite ceramic fiber material with a wall thickness of 10-20 mm, preferably 12-15 mm, so as to ensure that the aluminum-converting flow trough has higher toughness and lighter weight; specifically, a boron nitride coating is provided inside the aluminum-converting flow trough.

[0023] The utility model can be summarized in other specific forms that do not violate the spirit and main features of the utility model. Therefore, any changes within the meaning and scope equivalent to the claims of the utility model should be considered to be included in the scope of the claims.

Claims

1. A chute for high pressure casting of molten aluminum, characterized in that: The invention comprises a straight-in flow section (1) and an oblique-out flow section (2); the front end of the straight-in flow section (1) is provided with an aluminum liquid inlet (3), and a U-shaped aluminum liquid channel (4) is provided inside; the oblique-out flow section (2) is an oblique conical structure, comprising a large circular structure (5) at the top and a small circular structure (6) at the bottom; the small circular structure (6) at the bottom is provided with an aluminum liquid outlet (7) inside, and the aluminum liquid outlet (7) is connected to an external rounded corner (8).

2. The aluminum transfer launder for aluminum liquid high pressure casting according to claim 1, characterized in that: The straight flow section (1) has a U-shaped structure on the outside and is provided with an outer inclined surface (9).

3. The aluminum transfer launder for aluminum liquid high pressure casting according to claim 2, characterized in that: The angle between the outer inclined surface (9) and the horizontal direction is 40° to 65°.

4. The aluminum transfer launder for aluminum liquid high pressure casting according to claim 1, characterized in that: Two symmetrically distributed inner inclined surfaces (10) are provided inside the U-shaped aluminum liquid channel (4), and the angle between the inner inclined surfaces (10) and the horizontal direction is 40° to 65°.

5. The aluminum transfer launder for aluminum liquid high pressure casting according to claim 4, characterized in that: An inner rounded corner (11) is provided at the intersection of the inner inclined surfaces (10).

6. The aluminum transfer runner for aluminum liquid high pressure casting according to claim 1, characterized in that: The oblique outflow section (2) is provided with an upward inclined surface (12), and the angle between the upward inclined surface (12) and the horizontal direction is 5° to 25°.

7. The aluminum transfer runner for aluminum liquid high pressure casting according to claim 1, characterized in that: The aluminum transfer trough is made of calcium silicate composite ceramic fiber material with a wall thickness of 10-20 mm.

8. The aluminum transfer runner for aluminum liquid high pressure casting according to claim 7, characterized in that: A boron nitride coating is provided inside the aluminum conversion flow trough.

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