Vacuum die-casting crucible slag removal device

Abstract

The utility model belongs to the technical field of vacuum die casting, and particularly relates to a vacuum die casting crucible slag removing device. The vacuum die-casting crucible slag removal device comprises an operating rod, a slag removal device, a slag removal device and a slag removal device, wherein the front end of the operating rod extends into a die-casting bin, and the rear end of the operating rod is positioned outside the die-casting bin; the slagging-off head is arranged at the front part of the operating rod and is used for slagging off slag in the crucible; and the blowing head is arranged at the front end of the operating rod and is used for blowing the interior of the crucible. After the front end of the operating rod extends into the die-casting bin, slag in a crucible can be removed through the slag removal head, and then the interior of the crucible is further purged through the blowing head, so that slag adhesion on the wall surface of the crucible can be effectively reduced, and accumulation of the slag in the crucible is reduced; the potential risk that follow-up scum is involved into alloy liquid, and consequently inclusions are formed in a product is avoided, and the internal purity of the product is improved; the physical erosion of the slag charge on the crucible material can be reduced, the influence of slag charge accumulation on the crucible molten pool efficiency is reduced, and the service life of the crucible is effectively prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of vacuum die-casting, and in particular relates to a device for removing slag from a vacuum die-casting crucible. Background Art

[0002] See also Figure 1 In the traditional vacuum die-casting process, despite evacuation to reduce gas content, trace amounts of air inevitably remain within the casting chamber. When the master alloy is placed in a crucible and molten via induction heating, the surface of the molten metal comes into contact with the trace gases remaining in the vacuum environment, forming an oxide film on the surface. This phenomenon, combined with the inherent purity of the master alloy raw materials, causes trace oxide impurities within the alloy to float to the surface during the smelting process due to their lower density, where they merge with the surface oxide film to form a scum layer.

[0003] During the subsequent alloy pouring phase, this dross layer migrates backward with the flow and ultimately settles at the bottom of the crucible. As the production cycle progresses, the amount of dross accumulating at the bottom of the crucible gradually increases, posing a risk of being re-entered into the alloy flow during subsequent pouring processes. This can then infiltrate the final product, forming unacceptable inclusions and directly leading to a decline in product quality, including, but not limited to, deterioration of mechanical properties and appearance defects. Furthermore, dross accumulation significantly impacts crucible erosion and melt pool reduction, shortening crucible life, increasing production costs, and impacting production efficiency. Utility Model Content

[0004] The utility model aims to provide a device for removing slag from a vacuum die-casting crucible, so as to facilitate the removal of slag accumulated on the bottom of the crucible.

[0005] In order to solve the above technical problems, the utility model provides a vacuum die-casting crucible slag removal device, comprising:

[0006] An operating rod, the front end of which is used to extend into the die-casting chamber and the rear end is located outside the die-casting chamber;

[0007] A slag scraper head is provided at the front of the operating rod and is used to scrape off the slag in the crucible; and

[0008] The blowing head is arranged at the front end of the operating rod and is used to purge the crucible.

[0009] In one embodiment of the present application, an air passage is provided inside the operating rod;

[0010] The air blowing head is connected to the airway;

[0011] The operating rod is provided with a control valve for controlling the opening and closing of the airway.

[0012] In an embodiment of the present application, the rear end of the airway is provided with a taper joint.

[0013] In an embodiment of the present application, the blowing head is threadedly connected with the front end of the operating rod.

[0014] In an embodiment of the present application, the slag removing head is fixedly clamped on the front part of the operating rod by a clamp.

[0015] In an embodiment of the present application, the die casting bin comprises a bin door.

[0016] A sealing ball seat is arranged on the bin door.

[0017] A sealing ball is arranged in the sealing ball seat.

[0018] The sealing ball is sleeved on the operating rod.

[0019] In an embodiment of the present application, an observation window is arranged on the bin door.

[0020] In an embodiment of the present application, the slag removing head and the blowing head are oppositely directed.

[0021] The vacuum die casting crucible slag removing device comprises an operating rod, a slag removing head and a blowing head.

[0022] Other features and advantages of the present application will be illustrated in the following description, and some of them will become apparent from the description, or will be understood by those skilled in the art through implementation of the present application. The purposes and other advantages of the present application are realized and obtained by the structure specifically indicated in the description and the drawings.

[0023] In order to make the above purposes, features and advantages of the present application more obvious and easy to understand, the following preferred embodiments are specifically described with reference to the attached drawings. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 Schematic diagram of pouring molten metal into crucible during vacuum die casting process;

[0026] Figure 2 It is a three-dimensional diagram of a preferred embodiment of the vacuum die-casting crucible slag removal device of the present invention;

[0027] Figure 3 It is a front schematic diagram of the operating lever of the utility model;

[0028] Figure 4 It is a cross-sectional view of a preferred embodiment of the vacuum die-casting crucible slag removal device of the present invention;

[0029] Figure 5 It is a schematic diagram of the application of the vacuum die-casting crucible slag removal device of the utility model.

[0030] In the picture:

[0031] Operating rod 1, air channel 11, control valve 12, pagoda joint 13, slag scraper head 2, clamp 21, connecting block 22, air blowing head 3, warehouse door 4, sealing ball seat 41, sealing ball 42, observation window 43, sealing ring 44;

[0032] Crucible 101 , slag 102 , pouring 103 , sprue sleeve 104 , molten metal 105 , air pipe 106 , air blowing switching valve button 107 , slag tray 108 , metal-slag mixture 109 . DETAILED DESCRIPTION

[0033] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0034] See also Figure 2 、 Figure 3 and Figure 4In one embodiment, a vacuum die-casting crucible slag removal device includes: an operating rod 1, whose front end is used to extend into the die-casting chamber and whose rear end is located outside the die-casting chamber; a slag scraping head 2, which is arranged at the front of the operating rod 1 and is used to scrape off the slag in the crucible 101; and a blowing head 3, which is arranged at the front end of the operating rod 1 and is used to purge the crucible 101.

[0035] In this embodiment, the front end of the operating rod 1 can be extended into the die casting chamber, and the slag in the crucible can be removed by scraping the slag head 2 and then blowing the slag in the crucible through the blowing head 3.

[0036] See also Figure 4 An air passage 11 is provided inside the operating rod 1 ; the air blowing head 3 is connected to the air passage 11 ; and a control valve 12 for controlling the on-off of the air passage 11 is provided on the operating rod 1 .

[0037] Optionally, a pagoda connector 13 is provided at the rear end of the airway 11 .

[0038] In this embodiment, the pagoda connector 13 can be connected to an air pipe, which delivers gas into the airway 11 and then blows it out through the air blowing head 3. The control valve 12 can be used to control the on / off of the airway 11. It is provided on the handle portion of the operating lever 1 to facilitate the operator's opening and closing. Optionally, the control valve 12 can be a ball valve.

[0039] Optionally, the blowing head 3 cooperates with the front end thread of the operating rod 1 to facilitate disassembly and assembly.

[0040] Furthermore, the scraper head 2 is clamped and fixed to the front of the operating rod 1 by a clamp 21. Specifically, the clamp 21 is clamped to the front of the operating rod 1, and a connecting block 22 is connected to the clamp 21 by screws. The scraper head 2 and the connecting block 22 can also be connected by threads, so that the scraper head 2 can be easily replaced after it is damaged.

[0041] See also Figure 2 and Figure 4 The die casting chamber includes a chamber door 4; a sealing ball seat 41 is provided on the chamber door 4; a sealing ball 42 is provided in the sealing ball seat 41; and the sealing ball 42 is sleeved on the operating rod 1. In addition, an observation window 43 can also be provided on the chamber door 4.

[0042] In this embodiment, the operating rod 1 extends through the center of multiple observation windows 43 into the chamber door 4. A sealing ball seat 41 and a sealing ball 42 provide a sealed connection between the operating rod 1 and the chamber door 4. The sealing ball 42 may include an internal sealing ring 44 to prevent air leakage between the operating rod 1 and the sealing ball 42, which could affect the vacuum. The operator can observe the internal conditions through the observation windows 43. The operating rod 1 rotates and retracts thanks to the cooperation between the sealing ball 42 and the sealing ball seat 41.

[0043] In an embodiment of the present application, preferably, the directions of the slag scraping head 2 and the gas blowing head 3 are opposite. In this way, the slag scraping head 2 and the gas blowing head 3 can work without interfering with each other.

[0044] Referring to Figure 5 In an application scenario, after alloy smelting is completed, the crucible 101 carries the metal-slag mixture 109 which is difficult to flow back and is transferred to a predetermined master alloy dropping position. Then, the crucible 101 is tilted, and the operating rod 1 of the present application is inserted into the crucible cavity at the same time, the slag scraping head 2 is used to scrape the hot mixed slag layer, and after the slag is scraped, the slag is dropped into the slag tray 108. After the initial slag scraping process is completed, the control valve 12 is opened, high-purity nitrogen (N2) or argon (Ar) is introduced, and the gas blowing head 3 is used to perform deep purging on the inside of the crucible, which can effectively reduce the adhesion of slag on the wall of the crucible and further improve the cleanliness.

[0045] In summary, the vacuum die casting crucible slag removal device of the present application can reduce the accumulation of slag in the crucible, effectively block the potential risk that the slag is rolled into the alloy liquid during the pouring stage when the slag accumulates too much, and cause the formation of internal inclusions in the product, and improve the internal purity of the product. In addition, the use of the device can reduce the physical erosion of the slag on the crucible material and reduce the influence of slag accumulation on the efficiency of the crucible melt pool, effectively prolong the service life of the crucible, reduce the production and maintenance costs from the source, and provide strong support for improving the overall production efficiency and economic benefits.

[0046] In the present application, each device (parts without specific structure) is a general standard part or a part known to those skilled in the art, and its structure and principle can be known by technical personnel through a technical manual or through a conventional experimental method.

[0047] In the description of the embodiments of the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0048] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0049] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A vacuum die-casting crucible slag removal device, characterized in that: include: An operating rod (1), the front end of which is used to extend into the die-casting chamber and the rear end of which is located outside the die-casting chamber; A slag scraping head (2) is provided at the front of the operating rod (1) and is used for scraping off slag in the crucible; as well as The blowing head (3) is arranged at the front end of the operating rod (1) and is used for blowing the inside of the crucible.

2. The vacuum die-casting crucible slag removal device according to claim 1, characterized in that: An airway (11) is provided inside the operating rod (1); The air blowing head (3) is connected to the air duct (11); The operating rod (1) is provided with a control valve (12) for controlling the on-off of the air passage (11).

3. The vacuum die-casting crucible slag removal device according to claim 2, characterized in that: The rear end of the airway (11) is provided with a pagoda connector (13).

4. The vacuum die-casting crucible slag removal device according to claim 2, characterized in that: The blowing head (3) is engaged with the front end thread of the operating rod (1).

5. The vacuum die-casting crucible slag removal device according to claim 1, characterized in that: The scraper head (2) is clamped and fixed on the front part of the operating rod (1) by a clamp (21).

6. The vacuum die-casting crucible slag removal device according to claim 1, characterized in that: The die-casting bin includes a bin door (4); A sealing ball seat (41) is provided on the warehouse door (4); A sealing ball (42) is provided in the sealing ball seat (41); The sealing ball (42) is sleeved on the operating rod (1).

7. The vacuum die-casting crucible slag removal device according to claim 6, characterized in that: An observation window (43) is provided on the warehouse door (4).

8. The vacuum die-casting crucible slag removal device according to claim 1, characterized in that: The slag scraping head (2) and the air blowing head (3) are oriented in opposite directions.

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