CN204817915U - Casting mould of die casting machine locating lever - Google Patents

Abstract

The utility model discloses a casting mold for a positioning rod of a die-casting machine, comprising a mold body, wherein the mold body comprises an upper mold and a lower mold of a horizontally divided mold, at least two groups of horizontal positioning rod cavities are arranged between the upper mold and the lower mold, a mold core is arranged in the positioning rod cavity, and a straight runner which is axially the same as the positioning rod cavity and connected to the end face of the mold body is arranged on the mold body, an inner runner is arranged at the lower end of the positioning rod cavity, and the straight runner is connected to the inner runner through a plurality of internal flow channels. The mold is made horizontally and poured vertically, thereby basically eliminating the defect of shrinkage holes, and the defect rate after processing is less than 1%, which greatly improves the yield rate and achieves obvious economic benefits.

Description

Casting mold for positioning rod of die-casting machine

technical field

The utility model relates to a casting mold for a positioning rod of a die-casting machine.

Background technique

The positioning rod (as shown in Figure 1) is a supporting part of the guide rod of the die-casting machine. It belongs to the anti-fatigue traction brake part of the extrusion brake. 7. The casting has a regular structure and is a thin-walled part. In actual production, air shrinkage cavities appear in different degrees at the step joints after processing (as shown in Figure 2), causing the casting to be scrapped. The process yield is only 43%, and many models have This kind of quality defect has not achieved the desired effect after many times of improvement.

The traditional positioning rod casting mold is shown in Figure 3 and Figure 4. It adopts a horizontal and horizontal casting mold structure. The casting process of the original casting does not meet the structural requirements of the casting. Escape from the mold and form the main cause of the air shrinkage cavity at the final cooling place.

Contents of the invention

In order to overcome the deficiencies of the prior art, the utility model provides a casting mold for a positioning rod of a die-casting machine.

The technical scheme that the utility model solves its technical problem adopts is:

The casting mold of the positioning rod of the die-casting machine includes a mold body, and the mold body includes an upper mold and a lower mold that are split horizontally, at least two groups of horizontal positioning rod cavities are arranged between the upper mold and the lower mold, A mold core is provided in the positioning rod cavity, and the mold body is provided with a sprue in the same direction as the positioning rod cavity and connected to the end face of the mold body. The sprue is connected to the inner sprue through several internal runners, and an exhaust channel is provided at the upper end of the cavity of the positioning rod.

The internal flow channel includes a lateral flow channel.

The transverse flow channel is a ceramic tube.

The beneficial effects of the utility model are: the casting mold of the positioning rod of the die-casting machine includes a mold body, and the mold body includes an upper mold and a lower mold that are divided horizontally, and at least two sets of molds are arranged between the upper mold and the lower mold. The cavity of the positioning rod is placed horizontally. A mold core is arranged in the cavity of the positioning rod, and the mold body is provided with a sprue in the same direction as the axial direction of the positioning rod cavity and connected to the end face of the mold body. The lower end of the rod cavity is provided with an inrunner, and the sprue is connected to the inrunner through a number of internal runners. The horizontal mold is used to make the mold and the vertical pouring process basically eliminates the defects of air shrinkage holes and bad defects after processing. The production rate is less than 1%, which greatly improves the finished product rate and obtains obvious economic benefits.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is a schematic cross-sectional view of a positioning rod;

Fig. 2 is a schematic diagram of the air shrinkage hole of the positioning rod;

Fig. 3 is one of the mold schematic diagrams of traditional positioning rod;

Fig. 4 is the second schematic diagram of the mold of the traditional positioning rod;

Fig. 5 is a schematic cross-sectional view of the utility model when the mold is placed horizontally;

Fig. 6 is one of the cross-sectional schematic diagrams when the mold of the utility model is placed horizontally;

Fig. 7 is one of the cross-sectional schematic diagrams when the mold of the utility model is placed horizontally.

Detailed ways

Referring to Figures 5 to 7, Figures 5 to 7 are structural schematic diagrams of a specific embodiment of the present invention. As shown in the figure, the casting mold of the positioning rod of the die-casting machine includes a mold body, which is characterized in that: the mold body includes The upper mold 1 and the lower mold 2 of the horizontal split mold, at least two sets of horizontal positioning rod cavities 3 are arranged between the upper mold 1 and the lower mold 2, and the mold core is arranged in the positioning rod cavity 3 4. The mold body is provided with a sprue 51 in the same axial direction as the positioning rod cavity 3 and connected to the end face of the mold body. An ingate 52 is provided at the lower end of the positioning rod cavity 3. The direct sprue The channel 51 is connected to the ingate 52 through several internal flow channels, and the upper end of the positioning rod cavity 3 is provided with an exhaust channel 53 .

As shown in the figure, the internal flow channel includes a lateral flow channel 54. Preferably, the lateral flow channel 54 is made of a ceramic tube to increase the flow rate and reduce the temperature drop.

The casting process of the positioning rod of the die-casting machine includes the following steps:

Step 1, making the above-mentioned casting mold, placing the molding box horizontally, and making an upper mold 1, a lower mold 2, a sprue 51, an ingate 52, an exhaust channel 53 and an internal runner through molding sand in the molding box;

Step 2, dissolving iron, dissolving the iron raw material in the melting furnace;

Step 3, spheroidizing, pouring the molten iron into the ladle, adding a nodulizer when the temperature of the molten iron is 1480±20°C, the amount of the nodulizer added is 1.23%-1.27% of the mass of the molten iron;

Step 4, inoculating molten iron, adding an inoculant to the molten iron, the amount of the inoculant being 0.6%-0.8% of the mass of the molten iron;

Step 5, pouring, place the mold body vertically, pour molten iron from the sprue, the pouring temperature is 1360±20°C, and the pouring time is 10 seconds.

Preferably, the nodulizer is a rare earth magnesium nodulizer.

Preferably, in step four, the molten iron is inoculated in a ladle, or in step five, inoculation with the molten iron is carried out in the manner of inoculation with flow.

The utility model makes the mold horizontally, pours vertically, and through methods such as increasing the pouring temperature, slowing down the pouring speed, and upper exhaust channels, etc., the defects of air shrinkage holes are basically eliminated, and the defective defect rate after processing is less than 1%. , greatly improving the yield and achieving significant economic benefits.

The above is a specific description of the preferred implementation of the present utility model, but the present invention is not limited to the described embodiments, and those skilled in the art can also make various equivalent deformations or modifications without violating the spirit of the present utility model. Replacement, these equivalent modifications or replacements are all included within the scope defined by the claims of the present application.

Claims (3)

1. the casting mould of die casting machine backstay, comprise die ontology, it is characterized in that: described die ontology comprises patrix (1) and the counterdie (2) of horizontal parting, the horizontally-arranged backstay die cavity (3) of at least two groups is provided with between described patrix (1) and counterdie (2), core rod (4) is provided with in this backstay die cavity (3), and described die ontology is provided with backstay die cavity (3) axially in the same way and be communicated to the sprue (51) of die ontology end face, backstay die cavity (3) lower end is provided with ingate (52), described sprue (51) is communicated to ingate (52) by some inner flow passages, described backstay die cavity (3) upper end is provided with exhaust passage (53).

2. the casting mould of die casting machine backstay according to claim 1, is characterized in that: described inner flow passage comprises transverse flow channels (54).

3. the casting mould of die casting machine backstay according to claim 2, is characterized in that: described transverse flow channels (54) is earthenware.