Injection device of die cast machine

Abstract

To achieve improvement of durability and curb component costs and operating costs.SOLUTION: An injection device D of a die cast machine of the disclosure includes: a goose neck 20 to be immersed in a molten metal M; and a sleeve 30 which is disposed in the goose neck and provided with a passage of the molten metal. In the sleeve 30, a first passage F1 which communicates with an inlet, into which the molten metal flows, and into which a plunger for compressing the molten metal is inserted, and a second passage F2, passing from an outflow end side of the first passage to an injection port side in which the molten metal is injected to a die, are formed. The sleeve 30 is made of a ceramic, and the goose neck is made of a metal having aluminum erosion resistance.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to an injection device of a die-casting machine.

Background Art

[0002] There is a die-casting machine as a device for molding alloys such as aluminum, magnesium, and zinc. And, among die-casting machines, there is a hot-chamber type in which an injection device for injecting molten metal into a mold is immersed in the molten metal.

[0003] Here, FIG. 1 shows an injection device 100 in a hot-chamber type die-casting machine disclosed in Patent Document 1. The injection device 100 in Patent Document 1 includes a gooseneck 1 immersed in a molten aluminum alloy, and a flow path for the molten metal to be injected into the mold is formed in the gooseneck 1. Specifically, the gooseneck 1 has a wide first flow path (a flow path extending in the vertical direction on the right side of FIG. 1) on the inflow hole 5 side where the molten metal flows in, and a narrow second flow path formed by an outflow hole 7 communicating with the nozzle mounting port 8 where the molten metal flows out (a flow path extending in the vertical direction on the left side of FIG. 1).

[0004] And, in the injection device 100 of Patent Document 1, a substantially cylindrical sleeve 11 that forms the flow path itself on the inner wall surface and guides the plunger is provided in the first flow path on the inflow side of the gooseneck 1, and further, on the outer peripheral side of the sleeve 11, a substantially cylindrical holder 13 arranged to surround the outside of the sleeve 11 is provided. The holder 13 is connected at the lower end of the sleeve 11, and the first flow path is formed by the wall surfaces of the sleeve 11 and the holder 13. At this time, the sleeve 11 is made of ceramic, and the holder 13 is made of a metal having aluminum melt erosion resistance.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

SUMMARY OF THE INVENTION

PROBLEMS TO BE SOLVED BY THE INVENTION

[0006] However, in the technique described in the above-mentioned Patent Document 1, since the sleeve 11 and the holder 13 are connected in the first flow path, the holder 13 may be melted by the molten metal flowing through the first flow path at such a connection portion. For this reason, there arise problems such that the durability of the injection device is reduced, and component costs and work costs are incurred, such as the need to frequently replace components.

[0007] Therefore, an object of the present disclosure is to provide an injection device for a die casting machine that can improve durability and suppress component costs and work costs.

MEANS FOR SOLVING THE PROBLEMS

[0008] An injection device for a die casting machine according to an aspect of the present disclosure includes: a gooseneck immersed in molten metal; a sleeve disposed inside the gooseneck and having a flow path for molten metal formed therein; and a first flow path that communicates with an inlet through which the molten metal flows and into which a plunger for pressurizing the molten metal is inserted, and a second flow path that communicates from an outflow end side of the first flow path toward an injection port side through which the molten metal is injected into a mold are formed inside the sleeve. The sleeve is made of ceramic, and the gooseneck is made of a metal having aluminum melt erosion resistance. It has such a configuration.

EFFECTS OF THE INVENTION

[0009] With the present disclosure configured as described above, it is possible to improve durability and suppress component costs and work costs.

BRIEF DESCRIPTION OF THE DRAWINGS

[0010]

Figure 1

Figure 2

Figure 3

Embodiments for Carrying Out the Invention

[0011] <First Embodiment> The first embodiment of the present disclosure will be described with reference to the drawings. Note that the drawings may be relevant to any of the embodiments.

[0012] [Configuration] The injection device of the die-casting machine in the present embodiment is of a hot-chamber type. FIG. 2 shows a cross-sectional view of a part of the configuration of the injection device D of the die-casting machine. As shown in FIG. 2, the injection device D is arranged in a state of being immersed in a molten aluminum alloy stored in a pot (not shown in part). Note that the injection device of the die-casting machine in the present embodiment is applicable to molten metal of any alloy.

[0013] The injection device D includes a gooseneck 20 immersed in the molten metal. The gooseneck 20 is made of a metal having aluminum melt erosion resistance. Here, an enlarged view of the gooseneck 20 is shown in FIG. 3. As shown in FIGS. 2 and 3, inside the gooseneck 20, a receiving portion 21 is formed, which is a cavity portion where a sleeve 30 through which a flow path of the molten metal is formed is arranged as described later.

[0014] The accommodating portion 21 of the gooseneck 20 is formed in a substantially cylindrical cavity region having a predetermined length. One end side located above in FIG. 2 is open to the outside, and the other end side located below in FIG. 2 is closed. And, in the accommodating portion 21, a holding portion 22 having an inner diameter smaller than that of other locations above is formed from a predetermined position in the length direction to the other end. Further, an inflow hole 21a penetrating the side wall is formed in the side wall on the one end side with respect to the position where the holding portion 22 of the accommodating portion 21 of the gooseneck 20 is formed. For this reason, the molten metal will flow into the accommodating portion 21 of the gooseneck 20 from the inflow hole 21a.

[0015] A sleeve 30 is disposed in the holding portion 22 formed in the accommodating portion 21. The sleeve 30 is formed in a substantially cylindrical shape having a predetermined length, and the outer peripheral surface is abutted against and held by the holding portion 22. Incidentally, the sleeve 30 is made of ceramic. Further, the sleeve 30 is pressed from above by the block 60 toward the holding portion 22 side. Incidentally, the block 60 is made of a metal having aluminum erosion resistance.

[0016] The sleeve 30 is substantially cylindrical, and a first flow path F1 extending along the longitudinal direction is formed inside thereof. The inner diameter of the first flow path F1 is formed to have a substantially constant diameter along the longitudinal direction. Further, an inlet 31 communicating with the first flow path F1 through the side wall is formed in the side wall of the sleeve 30. The inlet 31 is formed, for example, in the vicinity of the position of the inflow hole 21a formed in the accommodating portion 21 of the gooseneck 20 described above. Thereby, the molten metal flowing into the accommodating portion 21 from the inflow hole 21a flows into the first flow path F1 formed inside the sleeve 30 from the inlet 31 of the sleeve 30. Thus, as shown by the arrow Y1 in FIGS. 2 and 3, the first flow path F1 is formed as a flow path through which the molten metal flows from the upper side, which is one end side, toward the lower side, which is the other end side, along the length direction. Incidentally, a plunger 50 for pressurizing the molten metal is inserted into the first flow path R1 of the sleeve 30, and the molten metal flows toward the outflow end F1e of the first flow path R1.

[0017] Also, inside the sleeve 30, as shown in FIG. 3, a third flow path F3 communicating with the first flow path F1 and a second flow path F2 are formed by extending from the first flow path F1. Specifically, the third flow path F3 is formed to bend and extend substantially at a right angle with respect to the longitudinal direction of the first flow path F1 from the outflow end F1e of the first flow path F1, and is formed with an inner diameter smaller than the inner diameter of the outflow end F1e of the first flow path F1. And the second flow path F2 is formed to bend and extend substantially at a right angle from the end of the third flow path F3, and is formed with substantially the same inner diameter as the third flow path F3. For this reason, as shown in FIGS. 2 and 3, the second flow path F2 is located in parallel with the first flow path F1. That is, the longitudinal direction of the second flow path F2 is substantially parallel to the longitudinal direction of the first flow path F1, and as shown by the arrow Y2 in FIG. 3, the direction of the flow of the molten metal flowing inside the second flow path F2 is opposite to the direction of the flow Y1 inside the first flow path F1. Also, the end side where the molten metal flows out of the second flow path F2 is further formed to face the injection port where the molten metal is injected into the mold.

[0018] Also, the block 60 that presses the above-described sleeve 30 abuts against the upper end of the sleeve 30, and in particular, is connected to the end on the outflow side of the second flow path F2. And as shown in FIG. 2, inside the block 60, a fourth flow path F4 is formed that communicates with the end on the outflow side of the second flow path F2 and in which the second flow path F2 is further extended. The fourth flow path F4 communicates from the end on the outflow side of the second flow path F2 toward the injection port where the molten metal is injected into the mold. In the example of FIG. 2, the fourth flow path F4 is formed to extend upward from the connection point with the second flow path F2 and bend and extend substantially at a right angle in the middle.

[0019] As described above, the injection device D of the die-casting machine in the present embodiment is a part where the molten metal flows into and is pressurized in the gooseneck 20, and a ceramic sleeve 30 is arranged at a part where the amount of the molten metal is large and the flow is intense. For this reason, it is possible to suppress the melting loss caused by the molten metal at such a part, and it is possible to improve the durability of the injection device D. Furthermore, thereby, it is not necessary to frequently replace parts, and it is possible to reduce the parts cost and the working cost.

[0020] In particular, in this embodiment, a sleeve 30, which is a single member, is formed with a first flow path F1 and a second flow path F2 that serve as flow paths for the molten metal and have flows in opposite directions to each other, and further a third flow path F3 whose flow direction changes. Therefore, the number of components can be reduced, and the durability of the injection device D can be improved.

[0021] As described above, the present disclosure has been described with reference to the above embodiments and the like. However, the present disclosure is not limited to the above-described embodiments. Various modifications that can be understood by those skilled in the art can be made to the configuration and details of the present disclosure within the scope of the present disclosure. And each of the above-described embodiments can be combined with other embodiments as appropriate.

[0022] <Supplementary Note> Some or all of the above embodiments can also be described as follows. Hereinafter, an outline of the configuration of an injection device of a die-casting machine in the present disclosure will be described. However, the present disclosure is not limited to the following configuration. (Supplementary Note 1) A gooseneck immersed in the molten metal, A sleeve disposed inside the gooseneck and having a flow path for the molten metal formed therein, Comprising, Inside the sleeve, a first flow path that communicates with an inlet through which the molten metal flows in and into which a plunger for pressurizing the molten metal is inserted, and a second flow path that communicates from the outflow end side of the first flow path toward the injection port side where the molten metal is injected into the mold are formed, The sleeve is made of ceramic, and the gooseneck is made of a metal having aluminum melt erosion resistance, An injection device of a die-casting machine. (Supplementary Note 2) The injection device of a die-casting machine according to Supplementary Note 1, Inside the sleeve, the first flow path and the second flow path are arranged in parallel and formed, An injection device of a die-casting machine. (Supplementary Note 3) The injection device of a die-casting machine according to Supplementary Note 2, A third flow path that communicates the first flow path and the second flow path arranged in parallel is formed inside the sleeve. Injection device of a die-casting machine. (Appendix 4) An injection device of a die-casting machine according to Appendix 1, a block for pressing the sleeve in the pressing direction of the plunger is provided, the block is made of a metal having aluminum melt erosion resistance, Injection device of a die-casting machine. (Appendix 5) An injection device of a die-casting machine according to Appendix 4, a fourth flow path is formed inside the block, and the second flow path extends from the end side on the molten metal outflow side of the second flow path toward the injection port side where the molten metal is injected into the mold so as to communicate, Injection device of a die-casting machine.

Explanation of reference numerals

[0023] D Injection device 20 Gooseneck 21 Accommodating part 21a Inflow hole 22 Holding part 30 Sleeve 31 Inlet 50 Plunger 60 Block F1 First flow path F2 Second flow path F3 Third flow path F4 Fourth flow path

Claims

1. A gooseneck immersed in the molten metal, a sleeve disposed inside the gooseneck and forming a flow path for the molten metal, comprising: inside the sleeve, a first flow path communicating with an inlet through which the molten metal flows in and into which a plunger for pressurizing the molten metal is inserted, and a second flow path communicating from the outflow end side of the first flow path toward an injection port side where the molten metal is injected into the mold are formed; the sleeve is made of ceramic, and the gooseneck is made of a metal having aluminum melt erosion resistance, an injection device of a die-casting machine.

2. The injection device of a die-casting machine according to Claim 1, wherein the first flow path and the second flow path are arranged in parallel inside the sleeve. An injection device of a die-casting machine.

3. The injection device of a die-casting machine according to Claim 2, wherein a third flow path communicating the first flow path and the second flow path arranged in parallel is formed inside the sleeve. An injection device of a die-casting machine.

4. The injection device of a die-casting machine according to Claim 1, wherein a block for pressing the sleeve in the pressurizing direction of the plunger is provided, and the block is made of a metal having aluminum melt erosion resistance. An injection device of a die-casting machine.

5. The injection device of a die-casting machine according to Claim 4, wherein a fourth flow path is formed inside the block, and the second flow path is extended therein so as to communicate from an end side on the outflow side of the molten metal in the second flow path toward an injection port side where the molten metal is injected into the mold. An injection device of a die-casting machine.

Images