CN204220956U - A kind of die casting with Local cooling - Google Patents

Abstract

The utility model discloses a kind of die casting with Local cooling.Comprise a dynamic model and a cover half.When described dynamic model and cover half matched moulds, between dynamic model and cover half, form a die cavity.Dynamic model and cover half are provided with the washboard structure of occlusion mutually.Dynamic model is provided with Local cooling core and slide block, and position corresponding with slide block on described cover half is provided with slide block draw-in groove.Mold cavity is stretched in described Local cooling core one end, and other end end is provided with a water inlet and a delivery port, is provided with water return pipeline in described cooling core inside, and described water inlet is connected with strong cooling water circulation equipment by pipeline with delivery port.Cover half is provided with a charging aperture, and cover half is also provided with a sprue bush with corresponding position, and running channel is positioned at sprue bush.The beneficial effects of the utility model are: can effectively prevent from occurring foundry goods shrinkage cavity phenomenon in press casting procedure; Reduce pulling of the non-finished surface of product; Increase the core life-span; Improve yield rate, increase economic benefit.

Description

A die-casting mold with partial cooling

technical field

The utility model relates to the field of material processing and molding, in particular to a die-casting mold.

Background technique

The full name of die-casting is pressure casting. Die-casting is a metal casting process. It refers to the casting method that fills the mold cavity with molten alloy under high pressure and high speed, and cools it under high pressure. It is the most widely used and fastest-growing casting process. One of the fastest metal hot forming process methods. With the continuous improvement of die-casting equipment and process technology, the application range of die-casting products will continue to expand on the existing basis.

However, it is a common phenomenon that die castings have shrinkage cavities and porosity. The core is easy to bond with the molten metal, which will cause strain on the non-processed surface of the product. The cause of shrinkage cavity and porosity in die castings is due to the inevitable shrinkage in disguise when the metal melt changes from liquid phase to solid phase after filling. Since die castings are characterized by cooling from the outside to the inside, when the wall thickness of the casting is large When the phenomenon of shrinkage cavity is inevitable.

In order to improve the shrinkage phenomenon of existing products, one adopts local strong cooling technology to pass high-pressure cooling water to some specific cores used in the mold and ensure good cooling water circulation, so that the core can maintain temperature during use. Constant, so as to prevent the die-casting mold from shrinkage cavity in the die-casting process has become the key to solving the problem.

Contents of the invention

The purpose of the utility model is to provide a die-casting mold with a local cooling core, which can effectively prevent shrinkage cavity of the casting during the die-casting process.

In order to achieve the above object, the utility model adopts the following technical solutions:

A die-casting mold with a locally cooled core includes: a movable mold and a fixed mold, the movable mold and the fixed mold are respectively provided with two exhaust washboard structures capable of interlocking; when the movable mold and the fixed mold are closed , a mold cavity is formed between the movable mold and the fixed mold; a local cooling core and a slider are provided on the movable mold, and a slider slot is provided on the fixed mold corresponding to the slider, and the fixed mold There is a feeding port on it.

Preferably, four guide columns are provided on the fixed mold, and four guide sleeves are provided on the movable mold at positions corresponding to the fixed mold.

Preferably, one end of the cooling core extends into the mold cavity, and the other end is provided with a water inlet and a water outlet, and a return water pipeline is provided inside the cooling core, and the water inlet and the water outlet pass through The pipeline is connected with strong cooling water circulation equipment.

Preferably, a vacuum pipeline is provided on the movable mold.

Preferably, one end of the exhaust washboard structure is connected to the vacuuming pipeline, and the other end is connected to the mold cavity.

Preferably, a splitter cone is provided at a position corresponding to the feed inlet on the movable mold, and a sprue sleeve is also provided at a position corresponding to the splitter cone of the movable mold on the fixed mold.

Preferably, the sprue is located in the sprue sleeve and matched with the feed inlet.

Preferably, the slider is connected with a hydraulic oil cylinder.

The beneficial effects of the utility model are: it can effectively prevent the casting shrinkage phenomenon in the die-casting process; reduce the strain on the non-processed surface of the product caused by the sticking of aluminum on the core; maintain the hardness and corrosion resistance of the core and increase the life of the core; The yield rate in the die-casting process is improved, and the economic benefits of the enterprise are increased.

Description of drawings

Figure 1 is a schematic diagram of the assembly of a die-casting mold with a locally cooled core of the present invention.

Fig. 2 is a schematic diagram of a movable mold of a die-casting mold with a partially cooled core of the present invention.

Fig. 3 is a schematic diagram of a die-casting mold with a partially cooled core of the present invention.

In the figure: movable mold 1, fixed mold 2, mold cavity 3, local cooling core 4, water inlet 5, water outlet 6, hydraulic cylinder 7, strong cooling water circulation equipment 8, return water pipeline 9, sprue 10, feed Port 11, guide column 12, slider 13, diverter cone 14, first exhaust washboard structure 15 of the movable mold, second exhaust washboard structure 16 of the movable mold, overflow channel 17, guide sleeve 18, second exhaust of the fixed mold Washboard structure 19, fixed mold first exhaust washboard structure 20, slide block slot 21.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail:

As shown in Figure 1, Figure 2 and Figure 3, a die-casting mold with a locally cooled core includes a moving mold 1 and a fixed mold 2. When the movable mold 1 and the fixed mold 2 are closed, a mold cavity 3 is formed between the movable mold 1 and the fixed mold 2 . The first exhaust washboard structure 15 of the movable mold and the second exhaust washboard structure 16 of the movable mold are arranged on the movable mold 1, and the first exhaust washboard structure 20 of the fixed mold and the first exhaust washboard structure 20 of the fixed mold are arranged on the fixed mold 2. The second exhaust washboard structure 19, the first exhaust washboard structure 15 of the movable mold and the first exhaust washboard structure 20 of the fixed mold can engage with each other, the second exhaust washboard structure 16 of the movable mold and the second row of exhaust washboard structure 16 of the fixed mold The air washboard structures 19 can engage with each other. A local cooling core 4 and a slider 13 are arranged on the movable mold 1 , and a slider locking groove 21 is arranged on the fixed mold 2 at a position corresponding to the slider 13 . One end of the local pressurized core 4 extends into the mold cavity 3, and the other end is provided with a water inlet 5 and a water outlet 6, and a return water pipeline 9 is provided inside the local cooling core 4 , the water inlet 5 and the water outlet 6 are connected to the strong cooling water circulation equipment 8 through pipelines. A feeding port 11 is provided on the fixed mold 2 . A splitter cone 14 is provided at a position corresponding to the feed inlet 11 on the movable mold 1, and a sprue sleeve is also provided at a position corresponding to the splitter cone 14 of the movable mold 1 on the fixed mold 2. The feed port 11 and the runner 10 are located in the sprue sleeve.

Four guide columns 12 are arranged on the movable mold 1 , and four guide sleeves 18 are respectively arranged on the positions corresponding to the guide columns 12 on the movable mold 1 on the fixed mold 2 . An overflow channel 17 is provided on the movable mold 1 . After the exhaust washboard structure is engaged, one end of the exhaust washboard structure is connected to the mold cavity 3, and the other end of the washboard structure is connected to an external vacuum device. The slider 13 is connected with the hydraulic cylinder 7 . In addition, cooling water pipes are respectively provided on the movable mold 1 and the fixed mold 2 .

During use, through the positioning of the guide column 12 and the guide sleeve 18, the movable mold 1 and the fixed mold 2 are closed, the slider 13 is embedded in the slider slot 21, and under the action of the clamping force , the movable mold 1 and the fixed mold 2 are tightly closed. A mold cavity 3 is formed between the movable mold 1 and the fixed mold 2 , and the molten metal is injected into the mold cavity 3 through the runner 10 along the inlet 11 . One end of the exhaust washboard structure is connected to the mold cavity 3, and the other end is connected to an external vacuum device to discharge excess gas in the mold cavity 3. Cooling water pipes are provided on the movable mold 1 and the fixed mold 2 Together with the local cooling core 4, the temperature of the mold is lowered. Since the provided local cooling core 4 is connected to the strong cooling water circulation device 8 through the water inlet 5 and the water outlet 6, high-pressure cooling water is circulated in the return water pipeline 9 inside the local cooling core 4, so that the The temperature of the local cooling core 4 is kept constant throughout the process, which avoids the phenomenon of shrinkage cavity due to the relatively thick part of the casting. The movable mold 1 and the fixed mold 2 are opened, the slider 13 is pulled out under the action of the hydraulic cylinder 7, and the ejector mechanism of the machine tool ejects the casting to complete the die-casting process.

Although the embodiment of the present utility model has been disclosed as above, it is not limited to the use listed in the description and the implementation, and it can be applied to various fields suitable for the present utility model. For those familiar with the art, Further modifications can be readily effected, so the invention is not limited to the specific details and examples shown and described herein without departing from the general concept defined by the claims and their equivalents.

Claims (8)

1. with a die casting for Local cooling core, it is characterized in that, comprising: a dynamic model and a cover half, dynamic model and cover half are respectively equipped with two exhaust washboard structures that can mutually be engaged; When dynamic model and cover half matched moulds, between dynamic model and cover half, form a die cavity; Dynamic model is provided with a Local cooling core and a slide block, and position corresponding with slide block on cover half is provided with a slide block draw-in groove, and cover half is provided with a charging aperture.

2. the die casting with Local cooling core according to claim 1, is characterized in that: described cover half is provided with four leads, and position corresponding with cover half on dynamic model is provided with four fairleads.

3. the die casting with Local cooling core according to claim 1 and 2, it is characterized in that: mold cavity is stretched in described cooling core one end, other end end is provided with a water inlet and a delivery port, be provided with water return pipeline in described cooling core inside, described water inlet is connected with strong cooling water circulation equipment by pipeline with delivery port.

4. the die casting with Local cooling core according to claim 3, is characterized in that: on described dynamic model, be provided with vacuum lead.

5. the die casting with Local cooling core according to claim 4, is characterized in that: one end of described exhaust washboard structure is connected with vacuum lead, and the other end is connected with die cavity.

6. the die casting with Local cooling core according to claim 5, is characterized in that: on described cover half, be provided with a charging aperture, and the dynamic model position corresponding with charging aperture is provided with a spreader.

7. the die casting with Local cooling core according to claim 6, is characterized in that: position corresponding with spreader on described cover half is also provided with a sprue bush, and running channel is positioned at sprue bush.

8. the die casting with Local cooling core according to claim 7, is characterized in that: described slide block is connected with hydraulic jack.