Flat ingot crystallizer for aluminum alloy negative pressure pouring and working process

Abstract

The invention relates to a slab ingot crystallizer for aluminum alloy negative pressure pouring and a working process, the slab ingot crystallizer comprises a crystallizer body, the crystallizer body is of a square annular structure, a step is arranged outside the crystallizer body, a water cavity is formed in one step surface, and an inclined hole is formed in the water cavity; a boss is arranged in the crystallizer body, a gas ring is installed on the boss in a matched mode, an oil ring is installed on the top face of the gas ring through a graphite corrugated belt, a lower clamping ring is installed outside the gas ring and the oil ring at the same time, the lower clamping ring presses the crystallizer body at the same time, and a hot top is installed on an inner ring of the lower clamping ring through a C-shaped seal. A plurality of molten aluminum inlets which are uniformly distributed are formed in the hot top, an upper clamping ring is mounted on a circle of the edge of the top surface of the hot top through a fastener, and the upper clamping ring is locked with a lower clamping ring; the dummy bar head is installed at the bottom of the crystallizer body in a matched mode, the molten aluminum cavity is formed between the dummy bar head and the hot top, and work is reliable and safe.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum alloy casting equipment, in particular to a flat ingot crystallizer used for negative pressure casting of aluminum alloy and a working process. Background Art

[0002] With the vigorous development of the aluminum processing industry, production and processing factories generally use batches of aluminum alloy casting machines. The number and tonnage of these machines are increasing year by year, with more and more types and higher levels of automation. However, the casting machines commonly used in the market still have some problems to a greater or lesser extent, which restricts the development of the aluminum alloy casting industry.

[0003] It is not difficult to find that the aluminum alloy ingots produced by the current aluminum alloy flat ingot casting crystallizer have the problem of poor quality. Specifically, the surface of the aluminum alloy ingot is relatively rough and the surface shell thickness is relatively large. Especially in the deep well casting process of aluminum alloy, it is more prone to explosion. In view of this situation, it is urgent to develop an aluminum alloy negative pressure casting flat ingot crystallizer. Summary of the invention

[0004] In view of the shortcomings of the above-mentioned existing production technology, the applicant provides a flat ingot crystallizer and working process for negative pressure casting of aluminum alloy, which can ensure product quality while preventing explosion and greatly improve the safety factor.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A flat ingot crystallizer for negative pressure casting of aluminum alloy comprises a crystallizer body, which is in a square ring structure and is provided with steps on the outside of the crystallizer body, wherein a water cavity is provided on one of the step surfaces, and an inclined hole is provided inside the water cavity; a boss is provided inside the crystallizer body, an air ring is installed on the boss, an oil ring is installed on the top surface of the air ring through a graphite corrugated belt, a lower clamping ring is installed on the outside of the air ring and the oil ring at the same time, and the lower clamping ring also presses the crystallizer body at the same time, a hot top is installed on the inner ring of the lower clamping ring through a C-type seal, a plurality of evenly distributed aluminum liquid inlets are opened on the hot top, an upper clamping ring is installed on the edge of the top surface of the hot top through a fastener, and the upper clamping ring is locked with the lower clamping ring;

[0007] A starter head is installed at the bottom of the crystallizer body, and an aluminum liquid cavity is formed between the starter head and the hot top.

[0008] Its further technical solution is:

[0009] A vacuum tank is arranged on the upper part of the crystallizer body.

[0010] An oil inlet is arranged on the upper part of the crystallizer body.

[0011] The outlet of the inclined hole corresponds to the ingot starter head.

[0012] A crystallizer mold plate is also installed outside the crystallizer body.

[0013] The inner wall surface of the crystallizer mold plate and the outer wall surface of the crystallizer body are connected through a plurality of sealing rings.

[0014] Both the gas ring and the oil ring adopt a split structure.

[0015] A plurality of circular holes are opened on the wall surface of the air ring, and the air ring is fixed to the crystallizer body by using graphite screws.

[0016] The cross section of the hot roof is an inverted trapezoidal structure.

[0017] A working process of a flat ingot crystallizer for negative pressure casting of aluminum alloy includes the following operation procedures:

[0018] Step 1: Preparation;

[0019] Install and prepare the crystallizer, and check whether all pipelines are connected;

[0020] Step 2: Oil and air ventilation;

[0021] Pass oil and air through the crystallizer;

[0022] Step 3: Aluminum liquid enters the working area;

[0023] The aluminum liquid enters the aluminum liquid cavity at the aluminum liquid inlet. The aluminum liquid surface is level with the surface of the outer runner. Under the control of the crystallizer mold plate, the crystallizer is slowly raised, so that the aluminum liquid surface inside the crystallizer is higher than the aluminum liquid surface of the outer runner. The aluminum liquid crystallizes into aluminum ingots. As the ingot starter moves downward, the aluminum liquid will be sucked into the crystallizer through the pressure difference because the crystallizer is in a vacuum state. In this way, continuous pouring can be performed to form aluminum ingots.

[0024] Step 4: Crystallization is completed.

[0025] The beneficial effects of the present invention are as follows:

[0026] The invention has a compact and reasonable structure and is easy to operate. The processing of aluminum ingots can be conveniently completed through the cooperation between the ingot starter, the crystallizer body, the gas ring, the oil ring, the upper and lower clamping rings and the hot top. The overall working reliability is good and the working efficiency is high. Vacuuming and negative pressure casting are used to ensure product quality while preventing explosion, thereby greatly improving the safety factor.

[0027] The present invention selects specific graphite to form a circle inside the crystallizer to form air sliding.

[0028] The casting oil outlet of the present invention adopts a special material (graphite corrugated belt) to penetrate the oil in a capillary overflow manner, and the oil penetration is uniform.

[0029] The flat ingot cooling of the present invention adopts double-angle one-circle multi-hole layered cooling.

[0030] The present invention forms a negative pressure cavity by drawing a vacuum hole through an air groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the present invention.

[0032] Figure 2 It is a structural schematic diagram of another viewing angle of the present invention.

[0033] Figure 3 It is an exploded view of the present invention.

[0034] Figure 4 It is a cross-sectional view of the present invention.

[0035] Figure 5 for Figure 4 A partial enlarged view of part A in the middle.

[0036] Among them: 1. Ingot starter; 2. Crystallizer body; 3. Gas ring; 4. Oil ring; 5. Lower clamping ring; 6. C-type seal; 7. Hot top; 8. Upper clamping ring; 9. Crystallizer mold plate; 10. Aluminum liquid cavity; 11. Graphite corrugated belt; 12. Inclined hole; 13. Water cavity; 14. Vacuum tank;

[0037] 701. Aluminum liquid inlet. DETAILED DESCRIPTION

[0038] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0039] like Figure 1-Figure 5 As shown, the flat ingot crystallizer for negative pressure casting of aluminum alloy in this embodiment includes a crystallizer body 2, which is in a square ring structure, and is provided with steps on the outside of the crystallizer body 2, one of which is provided with a water cavity 13, and an inclined hole 12 is provided inside the water cavity 13; a boss is provided inside the crystallizer body 2, and an air ring 3 is installed on the boss, and an oil ring 4 is installed on the top surface of the air ring 3 through a graphite corrugated belt 11, and a lower clamping ring 5 is installed on the outside of the air ring 3 and the oil ring 4 at the same time, and the lower clamping ring 5 also presses the crystallizer body 2, and a hot top 7 is installed on the inner ring of the lower clamping ring 5 through a C-type seal 6, and a plurality of evenly distributed aluminum liquid inlets 701 are opened on the hot top 7, and an upper clamping ring 8 is installed on the edge of the top surface of the hot top 7 through fasteners, and the upper clamping ring 8 is locked with the lower clamping ring 5;

[0040] A starter head 1 is mounted at the bottom of the crystallizer body 2 , and an aluminum liquid chamber 10 is formed between the starter head 1 and the hot top 7 .

[0041] A vacuum groove 14 is provided on the upper portion of the crystallizer body 2 .

[0042] An oil inlet is provided at the upper portion of the crystallizer body 2 .

[0043] The outlet of the inclined hole 12 corresponds to the starter head 1 .

[0044] A crystallizer mold plate 9 is also installed outside the crystallizer body 2 .

[0045] The inner wall surface of the crystallizer mold plate 9 and the outer wall surface of the crystallizer body 2 are connected through a plurality of sealing rings.

[0046] The gas ring 3 and the oil ring 4 both adopt a split structure.

[0047] A plurality of circular holes are formed on the wall surface of the gas ring 3 , and the gas ring 3 is fixed to the crystallizer body 2 by using graphite screws.

[0048] The cross section of the hot top 7 is an inverted trapezoidal structure.

[0049] The working process of the flat ingot crystallizer for negative pressure casting of aluminum alloy in this embodiment includes the following operation flow:

[0050] Step 1: Preparation;

[0051] Install and prepare the crystallizer, and check whether all pipelines are connected;

[0052] Step 2: Oil and air ventilation;

[0053] Pass oil and air through the crystallizer;

[0054] Step 3: Aluminum liquid enters the working area;

[0055] Aluminum liquid enters the aluminum liquid cavity 10 at the aluminum liquid inlet 701, and the aluminum liquid surface is level with the liquid surface of the outer flow channel. Under the control of the crystallizer mold plate 9, the crystallizer is slowly raised so that the aluminum liquid surface in the crystallizer is higher than the aluminum liquid surface of the outer flow channel. The aluminum liquid crystallizes into aluminum ingots as the ingot starter 1 moves downward. Because the crystallizer is in a vacuum state, the aluminum liquid will be sucked into the crystallizer through the air pressure difference, so that it can be continuously poured to form aluminum ingots. If aluminum leakage occurs at the ingot starter, the vacuum state of the negative pressure cavity is destroyed, and the aluminum liquid in the flow channel cannot enter the crystallizer, and the pouring stops, so as to prevent continuous leakage of aluminum into the deep well and explosion.

[0056] Step 4: Crystallization is completed.

[0057] In the actual work process, it is completed through the following process:

[0058] First, the crystallizer is oiled and ventilated; molten aluminum enters the molten aluminum cavity 10 at the molten aluminum inlet 701, and the molten aluminum level is level with the external flow channel liquid level. Under the control of the crystallizer mold plate 9, the crystallizer is slowly raised so that the molten aluminum level inside the crystallizer is higher than the molten aluminum level outside the flow channel. The molten aluminum crystallizes into an aluminum ingot as the ingot starter 1 moves downward. Because the inside of the crystallizer is in a vacuum state, the molten aluminum will be sucked into the crystallizer through the air pressure difference, so that it can be continuously poured to form an aluminum ingot.

[0059] The crystallizer of the present invention is provided with an oil inlet (not marked in the figure), through which the graphite corrugated belt 11 can be evenly hung on the outer surface of the gas ring 3.

[0060] The crystallizer of the present invention is provided with an air inlet (ie, a vacuum groove 14), through which the air is uniformly discharged through the gap of the air ring 3 to form an air-slip ingot, so that the outer surface finish and segregation layer of the ingot are better than those of a conventional crystallizer.

[0061] The flat ingot of the crystallizer of the present invention is cooled by double-angle multi-hole layers during downward movement to increase the casting speed.

[0062] That is, the present invention can ensure product quality while working under a vacuum negative pressure chamber. Through the cooperation between the gas ring 3 and the oil ring 4, the explosion phenomenon can be effectively prevented, thereby greatly improving the safety factor.

[0063] The design of the inclined hole 12 of the present invention allows the cooling water in the water cavity 13 to first cool the starter head 1 during the casting process, and then the aluminum ingot is cooled as the starter head 1 descends, thereby achieving a good cooling effect.

[0064] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any form of modification may be made within the scope of protection of the present invention.

Claims

1. A flat ingot crystallizer for negative pressure casting of aluminum alloy, characterized in that: The invention comprises a crystallizer body (2), which is in a square ring structure and is provided with steps on the outside of the crystallizer body (2), one of the step surfaces being provided with a water cavity (13), and an inclined hole (12) being provided inside the water cavity (13); a boss being provided inside the crystallizer body (2), and an air ring (3) being installed on the boss in cooperation with the air ring (3), and an oil ring (4) being installed on the top surface of the air ring (3) through a graphite corrugated belt (11), and a lower clamping ring (5) being installed on the outside of the air ring (3) and the oil ring (4) at the same time, and the lower clamping ring (5) also presses the crystallizer body (2), and a hot top (7) being installed on the inner ring of the lower clamping ring (5) through a C-type seal (6), and a plurality of evenly distributed aluminum liquid inlet ports (701) being provided on the hot top (7), and an upper clamping ring (8) being installed on the edge of the top surface of the hot top (7) through fasteners, and the upper clamping ring (8) is locked with the lower clamping ring (5); A starter head (1) is installed at the bottom of the crystallizer body (2), and an aluminum liquid cavity (10) is formed between the starter head (1) and the hot top (7).

2. A flat ingot crystallizer for negative pressure casting of aluminum alloy according to claim 1, characterized in that: A vacuum groove (14) is provided on the upper part of the crystallizer body (2).

3. A flat ingot crystallizer for negative pressure casting of aluminum alloy according to claim 1, characterized in that: An oil inlet is arranged at the upper part of the crystallizer body (2).

4. A flat ingot crystallizer for negative pressure casting of aluminum alloy according to claim 1, characterized in that: The outlet of the inclined hole (12) corresponds to the ingot starter (1).

5. The flat ingot crystallizer for negative pressure casting of aluminum alloy according to claim 1, characterized in that: A crystallizer mold plate (9) is also installed outside the crystallizer body (2).

6. A flat ingot crystallizer for negative pressure casting of aluminum alloy according to claim 5, characterized in that: The inner wall surface of the crystallizer mold plate (9) and the outer wall surface of the crystallizer body (2) are connected via a plurality of sealing rings.

7. A flat ingot crystallizer for negative pressure casting of aluminum alloy according to claim 1, characterized in that: The gas ring (3) and the oil ring (4) both adopt a split structure.

8. The flat ingot crystallizer for negative pressure casting of aluminum alloy according to claim 1, characterized in that: A plurality of circular holes are opened on the wall surface of the air ring (3), and the air ring (3) is fixed on the crystallizer body (2) by means of graphite screws.

9. The flat ingot crystallizer for negative pressure casting of aluminum alloy according to claim 1, characterized in that: The cross section of the hot top (7) is an inverted trapezoidal structure.

10. A working process of the flat ingot crystallizer for negative pressure casting of aluminum alloy as claimed in claim 1, characterized in that: The following operation procedures are included: Step 1: Preparation; Install and prepare the crystallizer, and check whether all pipelines are connected; Step 2: Oil and air ventilation; Pass oil and air through the crystallizer; Step 3: Aluminum liquid enters the working area; Aluminum liquid enters the aluminum liquid chamber (10) at the aluminum liquid inlet (701), and the aluminum liquid surface is flush with the liquid surface of the outer flow channel. Under the control of the crystallizer mold plate (9), the crystallizer is slowly raised so that the aluminum liquid surface in the crystallizer is higher than the aluminum liquid surface in the outer flow channel. The aluminum liquid crystallizes into an aluminum ingot as the ingot starter (1) moves downward. Because the inside of the crystallizer is in a vacuum state, the aluminum liquid is sucked into the crystallizer through the air pressure difference, so that continuous pouring can be performed to form an aluminum ingot. Step 4: Crystallization is completed.

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