Pouring system of magnesium alloy shell casting with window structure

Abstract

The utility model provides a pouring system of a magnesium alloy shell casting with a window structure, which comprises a shell cavity, the shell cavity comprises a cylindrical body and a window part arranged on the side of the cylindrical body, a sprue is arranged below the shell cavity, and a cross gate is arranged on the sprue; a vertical tooth-shaped pouring gate is arranged at the position, corresponding to the cylindrical body, of the transverse pouring gate, and a vertical door-shaped pouring gate is arranged at the position, corresponding to the window part, of the transverse pouring gate; the vertical tooth-shaped pouring gate is connected with the side wall and the top of the cylindrical body through a gap type flow gate, the shape of the vertical door-shaped pouring gate corresponds to that of the window part, and the vertical door-shaped pouring gate is connected with the side wall of the window part through the gap type flow gate. A feeding channel is completely opened, shrinkage cavities and looseness are avoided, the internal quality of castings is improved, and the one-time casting forming qualification rate of products is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of magnesium alloy casting, in particular to a casting system of a magnesium alloy shell casting with a window structure. Background Art

[0002] Due to the characteristics of low density, high specific strength and specific stiffness, good damping and thermal conductivity, dimensional stability, good working performance and strong electromagnetic shielding ability, magnesium alloys are widely used in the fields of automobiles, communications electronics, aerospace, etc. However, magnesium alloys have a wide crystallization range (solid phase temperature is about 420℃, liquid phase temperature is about 600℃, and there is a crystallization range of about 180℃), so they are prone to shrinkage, looseness, thermal cracking and other defects. At the same time, the density of magnesium alloys is about 2 / 3 of that of aluminum alloys. If the alloy liquid flows too fast during filling, or the cavity is not vented smoothly, invasive pores are likely to occur.

[0003] The shell involved in this application is a Φ250*280mm cylinder with a 200*200*100mm window. The shell has an overall size of 320*250*280mm, a main wall thickness of 4~10mm, a maximum wall thickness of 30mm, and a long and narrow oil passage inside. There are many thermal nodes, which are prone to shrinkage, looseness, thermal cracking and other defects during the casting process. Utility Model Content

[0004] The technical problem to be solved by the utility model is: in order to solve the problem that the existing shell casting with a window structure is prone to shrinkage holes, looseness and other defects, the utility model provides a casting system for magnesium alloy shell castings with a window structure to solve the above problems.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a casting system for a magnesium alloy shell casting with a window structure, which is used for casting a magnesium alloy shell with a window structure, comprising a shell cavity, wherein the shell cavity comprises a cylindrical body and a window portion arranged on the side of the cylindrical body, a straight runner is arranged below the shell cavity, and a cross runner is arranged on the straight runner; a vertical tooth-shaped runner is arranged on the cross runner corresponding to the cylindrical body, and a vertical gate-shaped runner is arranged corresponding to the window portion; the vertical tooth-shaped runner is connected to the side wall and the top of the cylindrical body through a gap-type inner gate, the shape of the vertical gate-shaped runner corresponds to the shape of the window portion, and the vertical gate-shaped runner is connected to the side wall of the window portion through the gap-type inner gate.

[0006] Furthermore: a gate-shaped runner riser is provided at the top of the vertical gate-shaped runner, and the top of the vertical gate-shaped runner is connected to the window portion through a top inner gate.

[0007] Furthermore: the shape of the horizontal runner is a cross, and four bottom inner gates connected to the bottom of the cylindrical body are arranged on the horizontal runner; the number of the slit-type inner gates on the vertical toothed runner is six.

[0008] Furthermore: the bottom ingate length L1 = (1.5~3) * the bottom ingate width K1, the bottom ingate height H = (1.5~2) * the bottom ingate width K1, the diameter of the vertical toothed runner is 50~70mm, the slit ingate length L2 = (1.5~2) * the slit ingate width K2, the cross-sectional area of ​​the vertical gate-shaped runner is (1.5~2.5) * the slit ingate width K2 * (1.5~2.5) * the slit ingate width K2; the runner is cross-shaped, the cross-sectional area of ​​a single runner is larger than the cross-sectional area of ​​the vertical toothed runner or the vertical gate-shaped runner, and the total cross-sectional area of ​​the cross-shaped runner: the cross-sectional area of ​​the straight runner is ≥3:1.

[0009] The beneficial effect of the utility model is that the pouring system of the magnesium alloy shell casting with a window structure adopts a vertical toothed runner and a vertical gate-shaped runner to fully feed the shell cavity, completely open the shrinkage feeding channel, avoid the generation of shrinkage holes and looseness, improve the internal quality of the casting, and ensure the one-time casting qualification rate of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0011] Figure 1 This is a structural front view of a pouring system of a magnesium alloy shell casting with a window structure of the utility model;

[0012] Figure 2 yes Figure 1 The structural stereogram of the shell cavity is omitted;

[0013] Figure 3 yes Figure 1 Middle AA section view.

[0014] In the figure, 1 is the shell cavity, 2 is the cylindrical body, 3 is the window part, 4 is the straight runner, 5 is the horizontal runner, 6 is the vertical toothed runner, 7 is the vertical gate runner, 8 is the gap type gate, 9 is the gate runner riser, and 10 is the bottom gate. DETAILED DESCRIPTION

[0015] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. On the contrary, the embodiments of the present invention include all changes, modifications and equivalents that fall within the spirit and connotation of the appended claims.

[0016] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0017] In addition, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance. In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, in the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0018] Any process or method description in the flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present invention belong.

[0019] like Figures 1 to 3As shown, the utility model provides a casting system for a magnesium alloy shell casting with a window structure, which is used for casting a magnesium alloy shell with a window structure, including a shell cavity 1, wherein the shell cavity 1 includes a cylindrical body 2 and a window portion 3 arranged on the side of the cylindrical body 2, a straight runner 4 is arranged below the shell cavity 1, and a cross runner 5 is arranged on the straight runner 4; a vertical tooth-shaped runner 6 is arranged on the cross runner 5 corresponding to the cylindrical body 2, and a vertical gate-shaped runner 7 is arranged corresponding to the window portion 3; the vertical tooth-shaped runner 6 is connected to the side wall and the top of the cylindrical body 2 through a gap-type ingate 8, the shape of the vertical gate-shaped runner 7 corresponds to the shape of the window portion 3, and the vertical gate-shaped runner 7 is connected to the side wall of the window portion 3 through the gap-type ingate 8.

[0020] The top of the vertical gate-shaped runner 7 is provided with a gate-shaped runner riser 9, and the top of the vertical gate-shaped runner 7 is connected to the window portion 3 through a top ingates. The cross runner 5 is in a cross shape, and is provided with four bottom ingates 10 connected to the bottom of the cylindrical body 2; the number of the slit-type ingates 8 on the vertical tooth-shaped runner 6 is six.

[0021] When the casting system is used to cast the magnesium alloy shell casting with a window structure, the molten metal enters from the bottom straight runner 4, is smoothly filled through the cross-shaped cross runner 5, and then enters the interior of the shell cavity 1 through the bottom inner gate 10. Since the vertical toothed runner 6 and the vertical gate-shaped runner 7 are respectively arranged corresponding to the cylindrical body 2 and the window portion 3 of the shell cavity 1, they are connected to the interior of the shell cavity 1 through the slit inner gate 8 and the top inner gate. In this way, the vertical toothed runner 6 and the vertical gate-shaped runner 7 can stably and fully compensate for shrinkage at different parts of the shell cavity 1. Even if the wall thickness of the shell cavity 1 varies greatly, there are many slender oil passages and many thermal nodes inside, and there are also special-shaped structures such as window structures, due to the dispersed compensation of the toothed runner and the runner design of the gate runner following the window structure, the gate runner riser 9 is effectively vented and also has a compensation effect. The shell cavity 1 is fully compensated, effectively overcoming the occurrence of defects such as shrinkage, looseness, and thermal cracking.

[0022] The length L1 of the bottom ingate 10 = (1.5~3) * the width K1 of the bottom ingate 10, the height H of the bottom ingate 10 = (1.5~2) * the width K1 of the bottom ingate 10, the diameter of the vertical toothed runner 6 is 50~70mm, the length L2 of the slit ingate 8 = (1.5~2) * the width K2 of the slit ingate 8, the cross-sectional area of ​​the vertical gate-shaped runner 7 is (1.5~2.5) * the width K2 of the slit ingate 8 * (1.5~2.5) * the width K2 of the slit ingate 8; the runner 5 is cross-shaped, the cross-sectional area of ​​a single runner 5 is larger than the cross-sectional area of ​​the vertical toothed runner 6 or the vertical gate-shaped runner 7, and the total cross-sectional area of ​​the cross-shaped runner 5: the cross-sectional area of ​​the straight runner 4 is ≥3:1.

[0023] The design of the runner and gate, combined with the decentralized runner design, completely opens the shrinkage-feeding channel of the gating system, and each cavity part is effectively and evenly fed for shrinkage, which improves the internal quality of the casting and ensures the one-time casting qualification rate of the casting.

[0024] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0025] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A casting system for a magnesium alloy shell casting with a window structure, used for casting a magnesium alloy shell with a window structure, comprising a shell cavity (1), wherein the shell cavity (1) comprises a cylindrical body (2) and a window portion (3) arranged on the side of the cylindrical body (2), and a sprue (4) is arranged below the shell cavity (1), characterized in that: A horizontal runner (5) is arranged on the straight runner (4); a vertical tooth-shaped runner (6) is arranged on the horizontal runner (5) at a position corresponding to the cylindrical body (2), and a vertical gate-shaped runner (7) is arranged at a position corresponding to the window portion (3); the vertical tooth-shaped runner (6) is connected to the side wall and the top of the cylindrical body (2) through a slit-type inner gate (8), the shape of the vertical gate-shaped runner (7) corresponds to the shape of the window portion (3), and the vertical gate-shaped runner (7) is connected to the side wall of the window portion (3) through the slit-type inner gate (8).

2. A pouring system for a magnesium alloy housing casting with a window structure as claimed in claim 1, characterized in that: A gate-shaped runner riser (9) is provided at the top of the vertical gate-shaped runner (7), and the top of the vertical gate-shaped runner (7) is connected to the window portion (3) via a top inner gate.

3. A pouring system for a magnesium alloy housing casting with a window structure as claimed in claim 2, characterized in that: The cross runner (5) is in the shape of a cross and is provided with four bottom inner gates (10) connected to the bottom of the cylindrical body (2); the number of the slit inner gates (8) on the vertical toothed runner (6) is six.

4. A pouring system for a magnesium alloy housing casting with a window structure as claimed in claim 3, characterized in that: The length L1 of the bottom ingate (10) is equal to (1.5 to 3) * the width K1 of the bottom ingate (10), the height H of the bottom ingate (10) is equal to (1.5 to 2) * the width K1 of the bottom ingate (10), the diameter of the vertical toothed runner (6) is 50 to 70 mm, the length L2 of the slit ingate (8) is equal to (1.5 to 2) * the width K2 of the slit ingate (8), and the vertical gate ingate is equal to The cross-sectional area of ​​(7) is (1.5~2.5)*the width K2 of the slit-type ingates (8)*(1.5~2.5)*the width K2 of the slit-type ingates (8); the runner (5) is cross-shaped, the cross-sectional area of ​​a single runner (5) is larger than the cross-sectional area of ​​the vertical toothed runner (6) or the vertical gate-shaped runner (7), and the total cross-sectional area of ​​the cross-shaped runner (5): the cross-sectional area of ​​the straight runner (4) is ≥3:1.

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