Casting equipment

Abstract

To provide a casting apparatus that ensures good yield while maintaining good exhaust and heat retention of the riser. [Solution] The casting apparatus 1 comprises a mold 11 having a side portion 11b that forms part of the side surface of the riser space 13 into which the riser is filled, and a ceiling portion 11a that forms the ceiling of the riser space 13; a core 12 provided below at least a part of the side portion 11b of the mold 11 and forming part of the side surface of the riser space 13; and an exhaust portion 14 provided on the dividing surface of the side portion 11b of the mold 11 and the core 12, which discharges air from inside the riser space 13 to the outside. The exhaust portion 14 discharges air when the upper surface of the riser is below the exhaust portion 14, and stops discharging air when the upper surface of the riser is above the exhaust portion, thereby forming an air layer in the space surrounded by the ceiling portion 11a and the side portion 11b of the mold 11.

Description

Technical Field

[0001] The present disclosure relates to a casting apparatus.

Background Art

[0002] Directivity in a low-pressure casting mold is ensured by supplying molten metal from a dam or a hot water pusher installed outside the product. Here, when the hot water pusher is arranged above the product, since the hot water pusher is filled with molten metal from the lower part of the product in low-pressure casting, the molten metal also fills the hot water pusher from the lower side.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] <00000​​​​​​ This disclosure provides a casting apparatus that ensures good yield while maintaining exhaust and heat retention of the riser. [Means for solving the problem]

[0007] The casting apparatus according to this disclosure comprises a mold having a side portion that forms a part of the side surface of a riser space filled with riser molten metal, and a ceiling portion that forms the ceiling of the riser space; a core provided below at least a part of the side portion of the mold and forming a part of the side surface of the riser space; and an exhaust portion provided on the dividing surface of the side portion of the mold and the core, which discharges air from the riser space to the outside, wherein the exhaust portion discharges air when the upper surface of the riser is below the exhaust portion and stops discharging air when the upper surface of the riser is above the exhaust portion, thereby forming an air layer in the space surrounded by the ceiling portion and the side portion of the mold. This improves the heat retention effect of the hot water dispenser. [Effects of the Invention]

[0008] This disclosure provides a casting apparatus that ensures good yield while maintaining exhaust and heat retention of the riser. [Brief explanation of the drawing]

[0009] [Figure 1] This is a cross-sectional view showing the internal configuration of the casting apparatus according to Embodiment 1. [Figure 2] This is a cross-sectional view showing the internal configuration of a casting apparatus in which a riser is inserted into the riser space according to Embodiment 1. [Figure 3] This is a cross-sectional view of the related casting apparatus. [Modes for carrying out the invention]

[0010] Embodiment 1 The casting apparatus according to this embodiment will now be described with reference to the drawings. Figure 1 is a cross-sectional view showing a part of the internal structure of the casting apparatus 1 from a side view. In particular, Figure 1 shows the upper vicinity of the casting apparatus 1.

[0011] As shown in Figure 1, the casting apparatus 1 comprises a mold 11, a core 12, a riser space 13 formed by the mold 11 and the core 12, and an exhaust section 14 formed on the dividing surface between the mold 11 and the core 12.

[0012] The mold 11 is a metal mold used to form a product by utilizing the plastic or fluid properties of the material. The mold 11 is positioned to form part of the ceiling and sides of the riser space 13.

[0013] Specifically, the mold 11 has a ceiling portion 11a that forms the top and a side portion 11b that forms a part of the side of the riser space. The mold 11 has a space 11c which is below the ceiling portion 11a and surrounded by the side portion 11b. This space 11c is part of the riser space 13.

[0014] The core 12 forms part of the side surface of the riser space 13 and is positioned below at least a portion of the side surface 11b of the mold 11. In other words, the upper surface of the core 12 and the lower surface of a portion of the side surface 11b of the mold 11 are positioned opposite each other, and this area is what is known as a trim surface.

[0015] The riser space 13 is a space whose upper part is closed by the ceiling portion 11a of the mold 11, and whose sides are surrounded by the side portion 11b of the mold 11 and the core 12. The riser space 13 is filled with molten metal from the space below where the product is formed. In other words, the riser space 13 is filled from below.

[0016] The exhaust part 14 is formed so as to penetrate from the hot water pressing space 13 inside the casting device 1 to the outside of the casting device 1 at the parting surface between the core 12, the mold 11, and the side surface part 11b. The exhaust part 14 can discharge the air in the hot water pressing space 13 when the molten metal is filled into the hot water pressing space 13. For example, the exhaust part 14 can be provided on a part or the whole of the parting surface.

[0017] Here, FIG. 2 shows a state where the hot water pressing space 13 is filled with hot water pressing from below. As the hot water pressing space 13 is filled with hot water pressing, the air filled in the hot water pressing space 13 is pushed by the hot water pressing and accumulates as an air layer near the ceiling part 11a of the mold 11.

[0018] At this time, in the casting device 1, if the upper surface of the hot water pressing in the hot water pressing space 13 is below the exhaust part 14, the air in the air layer flows to the exhaust part 14, so the air can be exhausted to the outside of the mold 11.

[0019] On the other hand, in the casting device 1, if the upper surface of the hot water pressing in the hot water pressing space 13 is above the exhaust part 14, the air is not discharged from the exhaust part 14, and an air layer is formed between the ceiling part 11a of the mold 11 and the upper surface of the hot water pressing.

[0020] That is, in the casting device 1, a part of the side surface of the hot water pressing space 13 is formed by the core 12, and the parting surface between the mold 11 and the core 12 is provided near the upper part in the hot water pressing space 13, so that the air in the hot water pressing space is exhausted from the parting surface, and the air above the parting surface is not exhausted.

[0021] Thereby, in the casting device 1, an air layer is provided between the upper part of the hot water pressing in the hot water pressing space 13 and the ceiling part of the mold 11. That is, the hot water pressing in the hot water pressing space 13 does not contact the ceiling part 11a.

[0022] Therefore, in the casting apparatus 1, when the cooling of the pressurized molten metal progresses from the portion in contact with the mold 11, since the upper part of the pressurized molten metal is not in contact with the mold 11, the cooling rate becomes slow, the heat retention effect is improved, and the solidification from the upper part of the pressurized molten metal is delayed. Therefore, the final solidification point of the pressurized molten metal in the pressurized molten metal space 13 is in an upper side state.

[0023] Thereby, the casting apparatus 1 can ensure the exhaust property and the heat retention property of the pressurized molten metal in a state with good yield.

[0024] Note that the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the gist. That is, the above description has been appropriately omitted and simplified for the sake of clarity of explanation, and those skilled in the art can easily change, add, and convert each element of the embodiment within the scope of the present invention.

Explanation of Reference Numerals

[0025] 1 Casting apparatus 11 Mold 12 Core 13 Pressurized molten metal space 14 Exhaust portion

Claims

[Claim 1] A side portion that forms part of the side of the riser space where the riser is filled, A mold having a ceiling portion that forms the ceiling of the aforementioned riser space, A core is provided below at least a portion of the side surface of the mold and forms a portion of the side surface of the riser space, The mold comprises an exhaust section provided on the cutting surface of the side portion of the mold and the core, which discharges the air in the riser space to the outside, The aforementioned exhaust section is Air is discharged when the upper surface of the riser is below the exhaust section, and air discharge is stopped when the upper surface of the riser is above the exhaust section. An air layer is formed in the space enclosed by the ceiling and side portions of the mold. Casting apparatus.

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