JPH06238415A - Die device for die casting - Google Patents

Abstract

PURPOSE:To improve the reliability and the workability of casting by surely separating a casting from a die casting device. CONSTITUTION:In this die device, and extruding pin 1 for surely executing cutting off at gates 5 and taking out the cast from a cavity at the gate 5 side and a spring 2 and a spring holder 3 for actuating the pin 1 are provided in the inner part of a fixed die parts 4. The cutting off of the solidified aluminum at the gate 5 part is stably executed with high reliability so that the cast product 15 always remains in a sleeve 6. Such problem caused in this constitution that the cast product remains in the fixed die parts, can be resolved and the stable and sure die separation can be realized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die casting mold apparatus for manufacturing a motor chassis or the like.

[0002]

2. Description of the Related Art In recent years, the die casting method has a high dimensional accuracy, a smooth and clean cast metal, a thin wall and a sharp ridge angle, and a large number of strong and complicated castings. It has been attracting attention due to its advantages such as being able to. Therefore, measures to improve high reliability and workability are being studied.

A conventional die casting mold device will be described below. FIG. 3 is a block diagram of a conventional die casting mold device. In FIG. 3, 12 is a fixed die in a three-piece die, 11 is an intermediate die, 10 is a movable die, and a cavity is formed between the movable die 10 and the intermediate die 11. Thirteen
Is a runner plate for securing a runner of a casting material such as aluminum provided on the fixed mold 12, and 14 is an ejector plate for discharging the solidified runner.

FIG. 4 is an enlarged cross-sectional view of an essential part near the cavity when the mold of the conventional die casting mold device is clamped, and FIG. 5 shows the mold of the conventional die casting mold device when the mold is opened. It is a principal part expanded sectional view of the vicinity of a cavity on the way. 4 and 5, 6 is a sleeve provided on the movable mold 10 shown in FIG. 3, 7 is a movable mold part that is provided on the movable mold 10 and can move in the sleeve 6, and 8 is a movable mold. A push-out pin installed in 10 to take out the cast product 15 from the inside of the sleeve 6 through the moving mold part 7, and 9 is the sprue 1 installed in the intermediate mold 11 shown in FIG.
A fixed mold component having 6 is a gate 5 provided at its tip. This fixed mold part 9 and sleeve 6
And the gap formed between the moving mold parts 7 is a cavity.

The operation of the die-casting die device constructed as above will be described below. First, molten aluminum flows through the runner provided in the runner plate 13, passes through the sprue 16 provided in the fixed mold component 9 and the gate 5, and is supplied into the cavity to cast the cast product 15. . The casting 15 is left in the sleeve 6 when the movable die 10 and the intermediate die 11 are opened due to the fitting with the sleeve 6 due to thermal expansion and expansion due to casting pressure. At this time, the solidified aluminum is cut from the portion of the gate 5 at the tip of the fixed mold component 9.

[0006]

However, in the above-mentioned conventional structure, when the cast product 15 is taken out from the fixed mold component 9, it depends on the fit with the sleeve 6 due to thermal expansion and casting pressure, etc. There is a problem that the cutting is unstable and the cast product 15 remains on the fixed mold component 9.

The present invention solves the above-mentioned problems of the prior art. The aluminum solidified at the gate 5 is cut in a highly reliable and stable manner, and the cast product 15 is always placed in the sleeve 6. It is an object to provide a remaining die casting mold device.

[0008]

In order to achieve the above object, the present invention provides a fixed mold part with a projecting means which projects from the inner wall of the fixed mold part.

[0009]

With the above-described structure, the present invention allows the cast product to be extruded from the fixed mold portion by the projecting means when the mold is opened.

[0010]

FIG. 1 is an enlarged cross-sectional view of an essential part near a cavity when a die of a die casting mold apparatus according to an embodiment of the present invention is clamped, and FIG. 2 is a die casting die according to an embodiment of the present invention. FIG. 6 is an enlarged cross-sectional view of a main part in the vicinity of a cavity in the middle of opening the mold of the mold device.

In FIGS. 1 and 2, reference numeral 1 denotes an extrusion pin provided inside the fixed mold component 4 for ensuring the cutting at the gate 5 and the removal of the casting 15 from the cavity on the gate 5 side. Reference numeral 2 is a spring for operating the push pin 1, and 3 is a spring retainer for supporting the spring 2. 6 is a sleeve, 7 is a movable mold part that can move in the sleeve 6, 8 is an extruding pin for taking out the cast product 15 from the sleeve 6 through the movable mold part 7, and 4 is a sprue 16 The gate 5 is a fixed mold part having a gate. The gap formed between the fixed mold component 4, the sleeve 6, and the movable mold component 7 is a cavity.

The operation of the die-casting die device constructed as above will be described below. First, molten aluminum passes through the sprue 16 provided in the fixed mold component 4 and the gate 5 and is supplied into the cavity to be cast into the casting 15.
Is cast. The cast product 15 that has been cast is pressed by the push-out pin 1 and left in the sleeve 6 when the die-casting mold device is opened by opening the mold. At this time, the aluminum solidified from the portion of the gate 5 at the tip of the fixed mold component 4 is cut and the casting 15 is separated from the cavity formed in the fixed mold component 4. Further, after being cut at the portion of the gate 5 by opening the mold, the casting 15 is fitted with the sleeve 6 by thermal expansion and casting pressure.
It is separated from the push-out pin 1 while it is left on. As a result, stable and reliable mold release can be realized.

[0013]

As described above, according to the present invention, since the fixed mold part is provided with the projecting means which projects from the inner wall of the fixed mold part, the cast product can be pushed out from the fixed mold part.
It is possible to realize stable and reliable mold release.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view of an essential part near a cavity when a die of a die casting die apparatus according to an embodiment of the present invention is clamped.

FIG. 2 is an enlarged cross-sectional view of a main part in the vicinity of a cavity in the middle of mold opening of a die casting mold device according to an embodiment of the present invention.

FIG. 3 is a block diagram of a conventional die casting mold device.

FIG. 4 is an enlarged cross-sectional view of a main part near a cavity when a mold of a conventional die casting mold device is clamped.

FIG. 5 is an enlarged cross-sectional view of a main part in the vicinity of a cavity in the middle of opening a mold of a conventional die casting mold device.

[Explanation of symbols]

 1 Extrusion pin 2 Spring 3 Spring retainer 4 Fixed mold part 5 Gate 6 Sleeve 7 Moving mold part 8 Extrusion pin 16 Sprue

Claims (1)

[Claims] 1. A movable mold part provided movably in the apparatus main body and a fixed mold part fixed to the main body of the device, wherein the fixed mold part projects from an inner wall of the fixed mold part. A die-casting mold device, characterized in that it is provided with a projecting means.