CN205414318U - Aluminum alloy tube describes flanged foundry goods metal mold gravity casting mold's structure of watering - Google Patents

Abstract

The utility model provides a sprue structure of an aluminum alloy tubular cast metal type gravity casting mold with a flange, which includes a cavity, a sprue, a sprue, a riser and a sand core, and the sprue includes a sprue and a sprue, the upper end of the sprue is connected to the sprue, the lower end of the sprue is connected to the upper end of the sprue, the sprue is an arc sprue, and the sprue is set as At least two, the lower end of the runner is connected to the side of the riser, the lower end of the riser is connected to the cavity, and a sand core is arranged in the cavity. In the utility model, one mold and two cavities share one sprue. In addition, the sprue is directly connected with the sprue and the cavity. This kind of sprue structure not only greatly improves the process yield of the casting, but also makes the mold structure compact, and the pouring The feeding efficiency of the riser is high, there is no air hole on the flange surface of the casting after processing, the yield is high, and the casting is easy to clean.

Description

Sprue Structure of Aluminum Alloy Tubular Casting Metal Mold Gravity Casting Mold

technical field

The utility model belongs to the technical field of metal casting, in particular to a sprue structure of a metal type gravity casting mold of an aluminum alloy tubular casting with a flange.

Background technique

Mold is an indispensable process equipment in modern industry, especially automobile, radio, aviation, electrical appliances, instruments, meters, daily necessities and other industries. The runner system of the casting mold refers to the flow channel of the melt from the ladle to the cavity. During the casting process, the molten liquid enters the mold cavity through the runner system, and the design of the runner system has a very important impact on the quality and production efficiency of the casting. More and more attention has been paid to how to make the mold structure simple, the pouring process convenient and stable, and to obtain castings with high yield and high process yield.

The runner structure of the existing mold generally all is that the gate is directly arranged on the casting, and the notification number CN202447587U discloses a mold runner structure, including a mold body, and a main runner is opened on the mold body, and the main runner The channel communicates with the first runner and the second runner along two directions through the secondary runner, the first runner communicates with the second runner, and the first runner and the second runner are U-shaped, The main sprue is vertical, the width of the main sprue gradually increases from top to bottom, and the main sprue communicates with the secondary sprue through a bottle-shaped groove. During the pouring process, the molten liquid directly passes through the gates of the main runner and the secondary runner for casting and molding, and the riser is filled at the end, so that the temperature of the riser will be relatively low, and the feeding effect on the casting is poor, and the flange after processing It is easy to have pores, which affects the quality and appearance of the product, and also brings concerns about quality and leakage to consumers. It is also not conducive to the cleaning of castings after pouring.

Utility model content

The purpose of the utility model is to overcome the deficiencies in the prior art and provide a runner structure for a tubular metal type gravity casting mold with a flange. The two cavities of the runner structure share a sprue, and the two The temperature of the cavity is basically the same, the casting quality of the two cavities is stable, and the riser is directly connected with the runner and the cavity, the temperature is high, the feeding efficiency is high, and there is no air hole after the flange surface of the casting is processed. This structure not only greatly improves the quality of the casting The process yield rate is high, and the casting yield is high, and the castings are easy to clean.

The technical scheme adopted in the utility model is as follows:

A runner structure of an aluminum alloy tubular flange casting metal type gravity casting mold, including a cavity, a runner, a sprue, a riser and a sand core, and the runner includes a sprue and a runner, The upper end of the sprue is connected to the sprue, the lower end of the sprue is connected to the upper end of the sprue, the sprue is an arc-shaped sprue, and there are at least two sprues. The lower end of the runner is connected to the side of the riser, the lower end of the riser is connected to the cavity, and a sand core is arranged in the cavity.

Preferably, the arc of the lower arc surface of the arc runner is 50-60°.

Preferably, the runners are evenly and symmetrically distributed, the cross-section of the runners is trapezoidal, and the cross-sectional area increases from top to bottom.

Preferably, the cross-sectional area of the runner is larger than that of the sprue.

Preferably, the sprue riser is a ring structure, and the top of the sprue riser is provided with an exhaust groove.

Preferably, the cross section of the sprue is trapezoidal or circular.

Preferably, the sprue is trumpet-shaped.

The beneficial effects of the utility model are:

1. The sub-runner of the utility model is an arc-shaped runner, and the arc of the lower arc surface of the arc-shaped runner is 50-60°, which can effectively reduce the impact velocity of the molten liquid caused by the height difference, thereby realizing fast and stable pouring , so that gravity casting can be carried out under the premise of ensuring product quality.

2. The riser of the utility model is directly connected with the runner and the mold cavity. The temperature of the riser is high, and the temperature of the casting is low, which conforms to the order of solidification, which is beneficial to the feeding of the casting. The yield rate is high, and the castings are easy to clean.

3. The pouring riser of the utility model has a ring structure and extends along the edge of the upper end surface of the cavity. The top of the pouring riser is provided with an exhaust groove, which can effectively exhaust and feed during the pouring process, and realize the order of castings. Solidification, thereby improving the performance of the product after molding, and increasing the yield.

4. A sand core is set in the mold cavity of the utility model. The sand core is a hollow structure, and the sand core communicates with the outside through the pouring riser, and a large amount of gas generated by the sand core can be quickly discharged during the pouring process.

5. The cross-sectional area of the sprue of the utility model is larger than that of the sprue, and the cross-sectional area of the sprue increases from top to bottom. After this structure is set, the molten liquid can be poured more quickly. Stable filling, reducing the oxidation of molten aluminum in order to further improve the performance and yield of the product.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment 1;

Among them, 1-sprue, 2-sprue, 3-sprue, 4-riser, 5-cavity, 6-lower arc surface, 7, sand core, 8, exhaust groove.

detailed description

The technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments of the utility model. Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

As shown in Figure 1, a runner structure of an aluminum alloy tubular band flange casting metal type gravity casting mold includes a cavity 5, a runner, a sprue 1, a sprue 4 and a sand core 7, wherein the sprue The sprue includes a sprue 2 and a sprue 3. The upper end of the sprue 2 is connected with the sprue 1, the lower end of the sprue 2 is connected with the upper end of the sprue 3, and the sprue 3 is an arc-shaped sprue, and the arc-shaped The arc of the lower arc surface 6 of the runner is 50-60°. In this embodiment, the arc of the lower arc surface 6 is 60°. There are two sub-runners 3, and the lower end of the sub-runner 3 is connected to the side of the sprue 4. , the lower end of the pouring riser 4 is connected with the mold cavity 5, the pouring riser 4 is a ring structure, and the top of the pouring riser 4 is provided with an exhaust groove 8; a sand core 7 is arranged in the mold cavity 5, and the sand core 7 is a hollow structure and passes through The pouring riser 4 communicates with the outside world.

As shown in Figure 1, the two cavities 5 share a sprue 2, which ensures that the temperature of the molten liquid poured in the two cavities 5 is the same, and the casting quality is stable. At the same time, one mold with two cavities and one mold with two pieces can be realized. , high process yield and high production efficiency. The molten liquid enters the sprue 2 from the trumpet sprue 1, the trumpet sprue 1 is conducive to the inflow of the molten liquid, the cross section of the sprue 2 is circular, and the lower end of the sprue 2 is connected with two arc structures The sprue 3, the cross-sectional area of the sprue 3 gradually increases from top to bottom, the cross-sectional area of the sprue 3 is larger than that of the sprue 2, and the melt enters the sprue from the sprue 2 3 can effectively reduce the impact velocity of the molten liquid caused by the height difference. The runner 3 with trapezoidal cross section can realize the fast and stable filling of the molten liquid. The design of the runner 3 can well reduce the flow velocity and momentum of the fluid , reducing the entrainment phenomenon during the filling process. The molten liquid enters the cavity 5 from the lower end of the runner 3 through the sprue 4 of the annular structure, fills the cavity 5 first, and then fills the annular sprue 4 with the molten liquid, because the sprue 4 and the sprue 3 and the cavity 5 are directly connected, which is equivalent to sharing the gate and the riser, so that the temperature of the gate 4 is high, and the temperature of the casting in the cavity 5 is low, so that the sequential solidification of the casting is realized, which is beneficial to the feeding of the casting and improves the temperature of the riser. the feeding efficiency. Moreover, a large amount of gas produced by the sand core 7 is quickly discharged from the upper core head of the sand core 7, and the gas in the cavity 5 is discharged from the exhaust groove 8 of the top pouring riser 4 and the gap between the sand core 7. Compared with the existing direct In terms of the discharge method, the casting has good compactness, no redundant structure will be formed on the surface of the casting, and no pores will appear after the casting is processed, which improves the yield of the casting. Finally, the casting slab is formed by cooling, and the casting riser 4 on the casting slab is cut off to obtain a good casting, and the casting is easy to clean.

The utility model has reasonable structural design, compact mold structure and low cost, reduces the cleaning work of castings, and improves the casting process yield and yield. Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model without limitation, other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solution of the utility model, as long as they do not depart from the technical solution of the utility model The spirit and scope should be included in the scope of the claims of the present utility model.

Claims (7)

1. A runner structure of an aluminum alloy tubular band flange casting metal type gravity casting mold, comprising a cavity, a runner, a sprue, a riser and a sand core, characterized in that: the runner includes a direct pouring and a sprue, the upper end of the sprue is connected to the sprue, the lower end of the sprue is connected to the upper end of the sprue, the sprue is an arc sprue, and the sprue is set There are at least two, the lower end of the runner is connected to the side of the riser, the lower end of the riser is connected to the cavity, and a sand core is arranged in the cavity. 2. The runner structure of an aluminum alloy tubular flange casting metal mold gravity casting mold according to claim 1, wherein the arc of the lower arc surface of the arc-shaped runner is 50-60°. 3. The runner structure of a kind of aluminum alloy tubular band flange casting metal mold gravity casting mold as claimed in claim 1, it is characterized in that: the runners are evenly and symmetrically distributed, and the cross section of the runners is Trapezoidal with increasing cross-sectional area from top to bottom. 4. The runner structure of an aluminum alloy tubular flange casting metal mold gravity casting mold as claimed in claim 1, wherein the cross-sectional area of the runner is larger than the cross-section of the sprue area. 5. The runner structure of an aluminum alloy tubular flange casting metal mold gravity casting mold as claimed in claim 1, characterized in that: the riser is a ring structure, and the top of the riser is provided with an exhaust gas groove. 6 . The runner structure of an aluminum alloy tubular flange casting metal mold gravity casting mold according to claim 1 , wherein the cross section of the sprue is trapezoidal or circular. 7. The runner structure of an aluminum alloy tubular casting with a flange metal mold gravity casting mold as claimed in claim 1, characterized in that: the sprue is trumpet-shaped.