Non-riser low-pressure casting process design structure of aluminum alloy auxiliary frame

Abstract

The utility model discloses a dead-head-free low-pressure casting process design structure for an aluminum alloy auxiliary frame. The dead-head-free low-pressure casting process design structure comprises a model, a cross gate and a liquid lifting opening, one end of the cross gate is communicated with a hot junction of the model; the lift gate is communicated with the other end of the cross gate; wherein the maximum inscribed circle diameter of the cross gate is gradually increased from one end of the model to one end of the liquid lifting port, and the product is fed through the cross gate. According to the utility model, a large number of risers can be removed through riser-free feeding, and molten aluminum at the risers can be saved, so that the process yield is improved to 50%-60% from the original 30%-40%; the number of risers can be reduced to the maximum extent, and process waste is reduced; and molten aluminum required for casting one product is reduced, so that the production efficiency and the product quality can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of low-pressure casting, in particular to a riserless low-pressure casting process design structure for an aluminum alloy subframe. Background Art

[0002] The current low-pressure casting process for aluminum alloy subframes is carried out through a horizontal runner - riser feeding system. Riser feeders are usually set in areas with "hot spots" in the products. In practice, the process system widely uses the form of riser feeders. The proportion of the casting in the total pouring weight is extremely low, mostly around 30% - 40%. The yield is extremely low and the loss is large. Due to the increase in the pouring weight, the heating of the tooling and molds is large, and a long heat dissipation time is required. At the same time, it leads to a decrease in production efficiency and an increase in manufacturing costs.

[0003] Therefore, we propose a riserless low-pressure casting process design structure for an aluminum alloy subframe. Summary of the Utility Model

[0004] The applicant of the present utility model aims at the above-mentioned disadvantages in the existing production technology and provides a riserless low-pressure casting process design structure for an aluminum alloy subframe. Through riserless feeding, a large number of risers can be removed, the aluminum liquid at the riser can be saved, and thus the process yield can be improved. The process yield is increased from the previous 30% - 40% to 50% - 60%. Moreover, the number of risers can be minimized to reduce process "waste". The amount of aluminum liquid required to cast one product is reduced, which can improve production efficiency and product quality.

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

[0006] A riserless low-pressure casting process design structure for an aluminum alloy subframe, comprising:

[0007] A mold;

[0008] A horizontal runner, one end of which is communicated with the hot spot of the mold;

[0009] A liquid-riser port, which is communicated with the other end of the horizontal runner;

[0010] Wherein, the maximum inscribed circle diameter of the horizontal runner gradually increases from one end of the mold to one end of the liquid-riser port, and the product is fed through the horizontal runner.

[0011] Its further features are as follows:

[0012] A core is arranged in the mold.

[0013] A plurality of horizontal runners are provided, and one liquid-riser port is communicated with a plurality of horizontal runners.

[0014] A plurality of liquid-riser ports are provided.

[0015] The beneficial effects of the present utility model are as follows:

[0016] The structure of the present utility model is compact and reasonable, and it is convenient to operate. Through feeding without risers, a large number of risers can be removed, the molten aluminum at the riser can be saved, thereby improving the technological yield. The technological yield is increased from the previous 30%-40% to 50%-60%; and the number of risers can be minimized to reduce process "waste"; the amount of molten aluminum required to cast a product is reduced, which can improve production efficiency and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the present utility model.

[0018] Figure 2 It is a schematic diagram of the model and core of the present utility model.

[0019] Figure 3 It is a schematic diagram of the liquid-riser and runner of the present utility model.

[0020] Figure 4 It is a schematic diagram for comparing feeding without riser and with riser of the present utility model.

[0021] Figure 5 It is a graph of the change trend of feeding pressure of the riser and the solidification aging diagram.

[0022] Among them: 1. Liquid-riser; 2. Runner; 3. Model; 4. Core; 5. Riser; 501. Riser neck. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following combines the drawings to illustrate the detailed embodiments of the present utility model.

[0024] As Figures 1 - 3 shown, a structure design of a low-pressure casting process without riser for an aluminum alloy subframe includes a model 3, a core 4, a liquid-riser 1 and a runner 2.

[0025] The core 4 is arranged in the model 3, a runner 2 is arranged at the hot spot of the model 3, and a liquid-riser 1 is arranged on the runner 2. There are multiple runners 2, one liquid-riser 1 can be connected to one runner 2, and one liquid-riser 1 can also be connected to multiple runners 2, and the runner 2 is connected to the model 3. The size of the runner 2 gradually increases from one end of the model 3 to one end of the liquid-riser 1, that is, the diameter of the largest inscribed circle of the runner 2 gradually increases from one end of the model 3 to one end of the liquid-riser 1.

[0026] As Figure 4 、 Figure 5As shown, the existing product feeding obtains effective feeding through the riser 5 - riser neck 501, and the riser neck 501 is arranged between the riser 5 and the mold 3. The reasons for the low feeding efficiency of the conventional riser design in low-pressure casting are as follows: Before the cross-gate 2 solidifies, the pressure direction of the riser 5 is upward, and at this time, the riser 5 does not play a feeding role at all; when the cross-gate 2 solidifies, the pressure direction in the riser 5 is downward, and then it can be converted into a gravity state, and the riser 5 can play a feeding role; at this time, the molten aluminum rapidly increases in the solidification phase during filling and pressure holding, and its flow ability is also lost a lot, so the feeding ability is naturally very poor.

[0027] As Figure 4 shown, the feeding principle without a riser is as follows: The cross-gate 2 gradually increases in size from one end of the mold 3 to one end of the liquid-riser 1, and directly feeds the product through the cross-gate 2. During the solidification process of the molten aluminum, the pressure direction of the cross-gate 2 is always upward, and the product feeding directly comes from the cross-gate 2 and the liquid-riser 1, and the feeding pressure always originates from the liquid-riser 1. There is no switching of the pressure direction, so its structure is simpler and more efficient.

[0028] Through feeding without a riser, a large number of risers 5 can be removed, the molten aluminum at the riser 5 can be saved, and thus the process yield can be improved. The process yield is increased from the previous 30% - 40% to 50% - 60%; and the number of risers 5 can be minimized to the greatest extent, reducing process "waste"; the amount of molten aluminum required to cast a product is reduced, the production efficiency can be improved, and the product quality can be improved.

[0029] The above description is an explanation of the present utility model, not a limitation thereof. The scope defined by the present utility model can be seen in the claims. Any form of modification can be made within the protection scope of the present utility model.

Claims

1. A riser-free low-pressure casting process design structure of an aluminum alloy subframe, characterized in that: include: Model (3); A runner (2), one end of which is connected to a hot junction of the mold (3); The liquid riser (1) is connected to the other end of the runner (2); The maximum inscribed circle diameter of the runner (2) gradually increases from one end of the model (3) to one end of the liquid riser (1), and the shrinkage of the product is compensated through the runner (2).

2. The aluminum alloy subframe low-pressure casting process design structure without riser as claimed in claim 1, characterized in that: A sand core (4) is arranged in the model (3).

3. The aluminum alloy subframe low-pressure casting process design structure without riser as claimed in claim 1, characterized in that: The cross runners (2) are provided in plurality, and one liquid riser (1) is connected to the plurality of cross runners (2).

4. The aluminum alloy subframe low-pressure casting process design structure without riser as claimed in claim 3 is characterized by: The liquid raising port (1) is provided with a plurality of ports.

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