JP6867360B2 - Die casting parts - Google Patents

Description

The present invention relates to a die casting component used when performing a die casting method.

Conventionally, die casting parts such as an injection sleeve for a die casting mold, which are arranged in a path of a runner for introducing a molten metal into a cavity defined by a fixed mold and a movable mold, have been known. Since this type of component is a member that comes into contact with a molten metal heated to a high temperature, a refrigerant passage for passing a cooling medium is formed inside the component. As prior art documents that disclose examples of such members, for example, Patent Document 1 below exists.

Patent Document 1 discloses an invention relating to a spool bush used in a die casting machine for forming a cast product by injecting a molten metal such as aluminum into a cavity of a mold. The present invention proposes a spool bush for a die casting machine, which does not leak the cooling liquid due to the influence of thermal expansion or the like and has a high degree of freedom in designing the cooling liquid passage.

Japanese Patent No. 4759759

In the technique disclosed in Patent Document 1 described above, a form in which a cooling liquid passage is formed by joining a plurality of pieces is shown. However, although this form is adopted for the purpose of obtaining a uniform cooling effect, it takes a lot of time and effort for processing work for joining and the like, and in order to form an accurate cooling liquid passage. There was a manufacturing problem such as the need to improve the processing accuracy and the joining accuracy.

The present invention has been made in view of the above-mentioned problems existing in the prior art, and an object of the present invention is to improve the component performance of a die-casting component in which a refrigerant passage for passing a cooling medium is formed inside the component. The purpose of the present invention is to provide die-casting parts that are easy to manufacture while being maintained, and that can shorten the manufacturing time and reduce the manufacturing cost.

Hereinafter, the present invention will be described. Reference numbers in the accompanying drawings are added in parentheses to facilitate understanding of the present invention, but the present invention is not limited to the illustrated form.

The die casting component according to the present invention is in the path of the runner (30a) in which the molten metal (2) is introduced into the cavity (1a) defined by the fixed mold (10) and the movable mold (20). A die-casting component arranged in the above, wherein a refrigerant passage (32a) for passing a cooling medium is formed inside the component, and the refrigerant passage (32a) is a liquid that follows the shape of the runner (30a). The portion formed with the path shape and the refrigerant passage (32a) is formed by the 3D printer is the laminated molding processing portion (32), and the portion other than the formed portion of the refrigerant passage (32a) is machined. It is a machined part (33) formed by the die casting die injection sleeve (30) in which the laminated molding part (32) and the machined part (33) are joined by welding joining or diffusion joining. The die-casting die injection sleeve (30) is characterized in that a retractable portion (32a1) is provided in the refrigerant passage (32a) along the notch (32b).

According to the present invention, it is easy to manufacture a die casting part in which a refrigerant passage for passing a cooling medium is formed inside the part while maintaining the performance of the part, and it is possible to shorten the manufacturing time and reduce the manufacturing cost. Possible die casting parts can be provided.

It is sectional drawing which shows the die-casting die provided with the injection sleeve for the die-casting die as the die-casting part which concerns on this embodiment, and shows the state before filling of molten metal. It is sectional drawing which shows the die-casting die provided with the injection sleeve for the die-casting die as the die-casting part which concerns on this embodiment, and shows the state after filling | filling of molten metal. It is external perspective perspective view of the injection sleeve for die casting mold which concerns on this embodiment. It is a perspective perspective view which shows the morphological example of the laminated molding processing part which comprises the injection sleeve for die casting mold which concerns on this embodiment. It is a figure which shows one form example of the refrigerant passage which the laminated molding processing part of the die casting die injection sleeve shown in FIG. 4 has. It is a perspective perspective view which shows the morphological example of the machined part which constitutes the injection sleeve for die casting mold which concerns on this embodiment.

Hereinafter, preferred embodiments for carrying out the present invention will be described with reference to the drawings. It should be noted that the following embodiments do not limit the invention according to each claim, and not all combinations of features described in the embodiments are essential for the means for solving the invention. ..

First, with reference to FIGS. 1 and 2, the overall configuration of a casting facility using an injection sleeve for a die casting mold as a die casting component according to the present embodiment will be described. Here, FIGS. 1 and 2 are cross-sectional views showing a die-casting die provided with an injection sleeve for the die-casting die as a die-casting component according to the present embodiment, and in particular, FIG. 1 is a state before filling of the molten metal. 2 shows the state after filling the molten metal. As shown in FIGS. 1 and 2, the die-casting die injection sleeve 30 as a die-casting component is provided in the die-casting die 1 for die-casting.

The die casting mold 1 according to the present embodiment has a fixed mold 10 including a fixed die 12 and a fixed holder 11, and a movable mold 20 including a movable die 22 and a movable holder 21. The cavity 1a is defined by the fixed die 12 and the movable die 22. Further, the die casting mold 1 is provided with an injection sleeve 30 for the die casting mold. The die casting mold injection sleeve 30 communicates with the cavity 1a via the biscuit 1b, the runner 1c, and the gate 1d. Further, a plunger tip 31 is provided in the injection sleeve 30 for the die casting mold. The plunger tip 31 can move forward and backward in the injection sleeve 30 for the die casting mold, moves forward to press the molten metal 2, and allows the molten metal 2 to pass through the biscuit 1b, the runner 1c, and the gate 1d, which are casting ports, and the cavity 1a. Is configured to fill in. The portion for introducing the molten metal into the cavity 1a, such as the biscuits 1b, the runner 1c, and the gate 1d, is also included in the runner of the present invention described later.

Further, a diversion element 40 is provided at the position of the biscuit 1b, which is a position opposite to the plunger tip 31 in the forward direction. By advancing the plunger tip 31 from the state shown in FIG. 1 to the state shown in FIG. 2, the molten metal 2 pressed by the plunger tip 31 and sent into the injection sleeve 30 for the die casting die 2 However, it collides with the branching element 40. The molten metal 2 that collides with the diversion element 40 is configured to be guided to the runner 1c and the gate 1d by the diversion element 40.

Next, more detailed configurations of the die casting mold injection sleeve 30 according to the present embodiment are shown in FIGS. 3 to 6. Here, FIG. 3 is an external perspective perspective view of the injection sleeve for the die casting mold according to the present embodiment. Further, FIG. 4 is a perspective perspective view showing a morphological example of the laminated molding processing portion constituting the die-casting die injection sleeve according to the present embodiment, and FIG. 5 is a perspective view showing a form example of the die-casting die injection sleeve shown in FIG. It is a figure which shows one form example of the refrigerant passage which the laminated molding processing part of a sleeve has. Further, FIG. 6 is a perspective perspective view showing a morphological example of the machined portion constituting the injection sleeve for the die casting mold according to the present embodiment.

As shown in FIG. 3, the die casting mold injection sleeve 30 according to the present embodiment is a member having a cylindrical outer shape. The injection sleeve 30 for the die casting mold is provided with a through hole 30a penetrating the inside, and the through hole 30a has a function as a runner for introducing the molten metal 2.

Further, the die casting mold injection sleeve 30 is composed of a laminated molding processing section 32 whose injection side of the molten metal 2 is shown in FIG. 4, and a machining section 33 whose reflection side of the molten metal 2 is shown in FIG. Further, the die-casting die injection sleeve 30 is formed by welding and joining the laminated molding processing portion 32 and the machining portion 33.

In the laminated molding processing portion 32 shown in FIG. 4, a refrigerant passage 32a for passing a cooling medium is formed inside the component, and the refrigerant passage 32a is formed so as to penetrate the inside of the laminated molding processing portion 32. It has a liquid passage shape that follows the shape of the through hole 30a as a runner. An example of a form of the refrigerant passage 32a having such a liquid passage shape is shown in FIG. Specifically, a retracting portion 32a1 is provided in the refrigerant passage 32a so as to follow the shape of the notch 32b of the laminated molding processing portion 32 provided in accordance with the runner. Further, in order to form the refrigerant passage 32a having the liquid passage shape shown in FIG. 5 inside the laminated modeling processing unit 32 and to form the laminated modeling processing unit 32 with one member, the laminated modeling processing unit according to the present embodiment. 32 is formed by a 3D printer. With such a configuration, it is possible to form the refrigerant passage 32a corresponding to the notch shape and keeping an equidistant distance from the molten metal, and it is possible to realize reliable cooling.

Here, if the entire die casting mold injection sleeve 30 is formed by a 3D printer, the manufacturing cost will increase. On the other hand, if an attempt is made to form a refrigerant passage 32a having a liquid passage shape that follows the shape of the through hole 30a only by machining without using a 3D printer, a plurality of pieces may be joined or a plurality of pieces may be joined as in the conventional technique. There was no choice but to adopt a manufacturing method that would increase the manufacturing cost, such as combining a plurality of refrigerant passages penetrating in a plurality of directions and filling unnecessary processed parts with plugs.

Therefore, in the present embodiment, the injection side portion of the molten metal 2 that requires the formation of the refrigerant passage 32a is a laminated molding processing portion 32 formed by a 3D printer, and the reflection side of the molten metal 2 that does not require the formation of the refrigerant passage 32a. The portion of was a machined portion 33 formed by machining. As for the machining for forming the machining portion 33, any conventionally known machining means such as cutting using a cutting tool and grinding using a grinding wheel can be used. In this way, the injection sleeve 30 for the die casting die is formed by combining the laminated molding processing portion 32 formed by the 3D printer and the machining portion 33 formed by machining, while maintaining the component performance. It is also easy to manufacture, and it has become possible to provide die-casting parts that can shorten the manufacturing time and reduce the manufacturing cost.

As the joining means between the laminated molding processing section 32 and the machining section 33, any conventionally known metal joining means such as diffusion joining can be used in addition to the welding joining described above.

Although the preferred embodiments of the present invention have been described above, the technical scope of the present invention is not limited to the scope described in the above embodiments. Various changes or improvements can be made to the above embodiments.

For example, in the above-described embodiment, the case where the die-casting component according to the present invention is the die-casting die injection sleeve 30 has been described as an example. However, the die casting parts according to the present invention can be applied to all parts used in the implementation of the die casting method, and for example, the present invention can be applied to mold parts such as an implant. It is possible.

It is clear from the description of the claims that such modified or improved forms may also be included in the technical scope of the present invention.

1 Die Casting Die, 1a Cavity, 1b Biscuits, 1c Runner, 1d Gate, 2 Molten, 10 Fixed Die, 11 Fixed Holder, 12 Fixed Die, 20 Movable Die, 21 Movable Holder, 22 Movable Die, 30 Die Casting Die Injection sleeve (die casting parts), 30a through hole (runner), 32 laminated molding machined part, 32a refrigerant passage, 32a1 retracted part, 32b notch, 33 machined part, 31 plunger tip, 40 minute flowr.

Claims (1)

A die-casting component placed in the path of a runner that introduces molten metal into a cavity defined by a fixed mold and a movable mold.
A refrigerant passage for passing the cooling medium is formed inside the component, and the refrigerant passage is formed so as to have a liquid passage shape that follows the shape of the runner.
The location where the refrigerant passage is formed is a laminated molding machine formed by a 3D printer.
A portion other than the portion where the refrigerant passage is formed is a machined portion formed by machining.
It is an injection sleeve for die casting dies in which the laminated molding processing portion and the machining portion are joined by welding joining or diffusion joining , and is retracted into the refrigerant passage along the notch of the injection sleeve for die casting dies. die casting parts, wherein the parts are provided.

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