Building block type aluminum alloy casting mold with risers and pouring gates

Abstract

The utility model discloses a building block type aluminum alloy casting die with a riser and a pouring gate, which comprises an outer frame die, a side die block, a casting head die assembly, an upper cover die and a lower bottom die which are enclosed to form a casting die cavity, the number of the side modules is one or more, the side modules and the casting head module assembly are arranged at the left side position in the outer frame mold, the side modules and the casting head module assembly have the same width and height, the relative position between the side modules and the casting head module assembly is adjustable, and the side modules and the casting head module assembly jointly form the left side boundary of the casting mold cavity; a casting head is arranged on the casting head die assembly and is communicated with the casting die cavity; the lower bottom die is positioned on the lower side in the outer frame die to form the bottom side boundary of the casting die cavity; the lower bottom die is provided with a pit at a position corresponding to the casting head; the upper cover mold forms an upper boundary of the casting mold cavity. According to the utility model, the building block type combination use of the mold assembly is realized, the height of the casting mold cavity and the position of the casting gate can be adjusted, and one mold has multiple purposes.

Description

Technical Field

[0001] The utility model relates to the field of metal casting molds, in particular to an aluminum alloy casting mold. Background Art

[0002] Graphite molds for casting small-quality aluminum alloys in laboratories are basically made by digging a square groove in a graphite matrix, and the shape is relatively fixed. During casting, the molten metal liquid will generate air holes by swirling air at the bottom, resulting in an uneven bottom ingot. The upper surface of the ingot is exposed to the air, and when cooling, the metal liquid solidifies and shrinks, generating dendrites, which will also generate an uneven upper surface, resulting in non-uniformity of the upper and lower surface structures. Content of the Utility Model

[0003] In order to solve the problems in the prior art, the utility model provides an aluminum alloy casting mold with a modular structure, riser and runner, so as to obtain an aluminum alloy ingot with flat upper and lower surfaces and uniform structure.

[0004] To solve the above technical problems, the utility model adopts the following technical solutions:

[0005] An aluminum alloy casting mold with a modular structure, riser and runner, includes an outer frame mold, side molds, a riser and runner mold assembly, an upper cover mold and a lower bottom mold. The above components enclose to form a casting cavity.

[0006] The outer frame mold is a rectangular ring.

[0007] One or more side molds are provided. The side molds and the riser and runner mold assembly are arranged and placed at the left position inside the outer frame mold. The side molds and the riser and runner mold assembly have the same width and height, and the relative positions between the side molds and the riser and runner mold assembly can be adjusted, jointly forming the left boundary of the casting cavity.

[0008] The riser and runner mold assembly is provided with a riser, and the riser is communicated with the casting cavity.

[0009] The lower bottom mold is located at the lower side position inside the outer frame mold, and its size matches the inner diameter of the outer frame mold. The lower bottom mold forms the bottom boundary of the casting cavity. The side molds and the riser and runner mold assembly are both placed on the lower bottom mold, and a pit is provided at the position corresponding to the riser on the lower bottom mold.

[0010] The upper cover mold is placed at the upper side position of the outer frame mold, and the left side of the upper cover mold contacts the side molds and the riser and runner mold assembly. The upper cover mold forms the upper boundary of the casting cavity.

[0011] The other inner sides of the outer frame mold form the right boundary, front boundary and rear boundary of the casting cavity.

[0012] Further, the side mold is a rectangular block, and a bolt mounting hole is opened on the upper surface of the side mold.

[0013] Further, the riser mold assembly is composed of two riser modules that are mirror-symmetrical, and a riser is formed between the two riser modules;

[0014] The riser includes a funnel-shaped riser, a vertical runner, a straight runner, and a flared straight runner. The diameter of the vertical runner is the same as the lower circle of the riser and is connected up and down. The straight runner is laterally connected to the vertical runner. The small end of the flared straight runner is horizontally connected to the straight runner, and the large end of the flared straight runner is connected to the casting mold cavity;

[0015] The funnel-shaped riser, the vertical runner, the straight runner, and the flared straight runner are all divided into two symmetrical parts, and the two parts are respectively located on the two riser modules.

[0016] Further, the width of the straight runner is not less than 2 / 3 of the diameter of the vertical runner.

[0017] Further, the upper surface of the funnel-shaped riser exceeds the upper surface of the casting mold cavity.

[0018] Further, the upper cover mold is composed of two mold cover plates. There is a semicircular cut at a position far from the riser on the docking edge of the two mold cover plates. The two semicircular cuts are spliced into a cylindrical cavity, and the cylindrical cavity serves as an exhaust port.

[0019] Further, the concave pit extends in the front-rear direction. The bottom of the concave pit is a rounded corner, and the part close to the casting mold cavity is an inclined slope.

[0020] Further, a height adjustment mechanism is provided on the lower side of the lower bottom mold to adjust the relative height position between the lower bottom mold and the outer frame mold.

[0021] Further, the height adjustment mechanism includes a plurality of adjustment holes opened on the lower side of the lower bottom mold. The depth of the adjustment holes is fixed, and multiple groups of adjustment bolts with different heights are provided.

[0022] Further, the height adjustment mechanism includes multiple groups of adjustment holes opened on the lower side of the lower bottom mold. Each group of adjustment holes has a different depth, and adjustment bolts with a fixed height are provided.

[0023] Advantages of the present utility model:

[0024] 1. The present utility model realizes the modular combination and use of the mold assembly, can adjust the height of the casting mold cavity and the position of the casting gate, and realizes the multi-purpose use of one mold.

[0025] 2. The present utility model uses the riser and the upper cover mold to eliminate the unevenness of the upper surface caused by the shrinkage of the molten metal, and ensures the flatness of the upper surface and the uniformity of the structure.

[0026] 3. The utility model designs a concave pit on the lower bottom die to eliminate the negative impacts of gas entrainment and convective remelting of the molten metal on the lower surface of the ingot, ensuring the flatness of the lower surface and the uniformity of the ingot structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is the overall effect of the casting mold of the present utility model Figure 1 ;

[0028] Figure 2 is the overall effect of the casting mold of the present utility model Figure 2 ;

[0029] Figure 3 is the top view of the casting mold of the present utility model;

[0030] Figure 4 is Figure 3 the sectional view taken along line A-A in

[0031] Figure 5 is Figure 3 the sectional view taken along line B-B in

[0032] Figure 6 is the effect diagram of the pouring riser mold assembly in the present utility model;

[0033] Figure 7 is the effect diagram of the upper cover mold in the present utility model;

[0034] Figure 8 is the bottom view of the lower bottom die in the first embodiment of the present utility model;

[0035] Figure 9 is Figure 8 the sectional view taken along line C-C in

[0036] Figure 10 is the top view of the lower bottom die in the first embodiment of the present utility model;

[0037] Figure 11 is the bottom view of the lower bottom die in the second embodiment of the present utility model;

[0038] Figure 12 is Figure 11 the sectional view taken along line D-D in

[0039] Figure 13 is the top view of the lower bottom die in the second embodiment of the present utility model.

[0040] The drawings are only for illustrative purposes and should not be construed as a limitation of this patent; for better illustration of this embodiment, some components in the drawings may be omitted, enlarged or reduced, which do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The hatched part in the figure shows the hole surface of the wire outlet hole.

[0042] Embodiment 1:

[0043] As Figures 1 to 10 shown, this embodiment provides an aluminum alloy casting mold with a modular riser and runner, including an outer frame mold 1, side molds 2, a riser and runner mold assembly, an upper cover mold 5, and a lower bottom mold 6. The above components enclose to form a casting cavity.

[0044] The structures of the above components will be described in detail below.

[0045] The outer frame mold 1 is a rectangular graphite ring with a graphite ring thickness of 30 - 50 mm, a height of 50 - 70 mm, and the length and width dimensions are matched with the lower bottom mold 6, allowing the lower bottom mold 6 to be freely taken and placed.

[0046] The side molds 2 are two rectangular graphite blocks. The side molds 2 and the riser and runner mold assembly are arranged at the left position inside the outer frame mold 1, jointly forming the left boundary of the casting cavity. The side molds 2 and the riser and runner mold assembly have the same width and height, and the relative position can be adjusted with the riser and runner mold to change the position of the casting gate.

[0047] In other embodiments, the number of side molds 2 can be other numbers.

[0048] Three bolt mounting holes 21 are opened on the upper surface of the side mold 2, and bolts can be installed to facilitate removal from the lower bottom mold.

[0049] The riser and runner mold assembly is composed of two mirror - symmetric riser and runner modules 3 and 4, and a riser is formed between the two riser and runner modules 3 and 4.

[0050] The riser includes a funnel - shaped riser, a vertical runner, a straight runner, and a trumpet - shaped straight runner. The funnel - shaped riser, the vertical runner, the straight runner, and the trumpet - shaped straight runner are all divided into two symmetric parts, and the two parts are respectively located on the two riser and runner modules 3 and 4.

[0051] Among them, the semi - funnel - shaped risers 31 and 41 are combined into a complete funnel - shaped riser 91, the semi - vertical runners 32 and 42 are combined into a complete vertical runner, the semi - straight runners 33 and 43 are combined into a complete straight runner, and the semi - trumpet - shaped straight runners 34 and 44 are combined into a complete trumpet - shaped straight runner.

[0052] The upper circular diameter of the funnel-shaped riser 91 is 20 - 30 mm, the lower circular diameter is 10 - 15 mm, and the height is 20 - 30 mm; the diameter of the vertical runner is the same as that of the lower circle of the riser, and the height is 20 - 30 mm. The vertical runner is vertically connected to the lower circle of the riser; the width of the straight runner is not less than 2 / 3 of the diameter of the vertical runner, and the height is 20 - 30 mm. The straight runner is laterally connected to the vertical runner; the height of the flared straight runner is 20 - 30 mm. The small end of the flared straight runner is horizontally connected to the straight runner, and the large end is directly connected to the casting mold cavity.

[0053] The upper surface of the funnel-shaped riser exceeds the upper surface of the casting mold cavity to ensure the feeding of molten metal. And since the width and height of the riser mold assembly are the same as those of the side module, the relative position can be adjusted with the side module to change the position of the casting gate.

[0054] The upper cover mold 5 is composed of two graphite plates with a thickness of 15 - 30 mm. The size of each plate is slightly smaller than half of the outer frame mold. After combination, it can completely cover the casting mold cavity. The left side of the upper cover mold 5 contacts the side module and the riser mold assembly. The upper cover mold 5 forms the upper side boundary of the casting mold cavity.

[0055] There is a semi-circular cut 51 at the position far from the riser on the docking edge of the two graphite plates. The semi-circular cuts 51 can be spliced into a cylindrical cavity 92 with a diameter of 10 - 15 mm, which is used to discharge the air in the casting mold cavity and limit the final shrinkage part of the molten metal.

[0056] The bottom mold 6 is a graphite plate located at the lower side position inside the outer frame mold 1, and its size matches the inner diameter of the outer frame mold. The bottom mold 6 forms the bottom side boundary of the casting mold cavity. The side module 2 and the riser mold assembly are both placed on the bottom mold 6, and a concave pit 62 is provided at the position corresponding to the riser on the bottom mold 6. The concave pit 62 is used to directly receive the molten metal of the riser during use, preventing the molten metal from generating gas in the mold cavity and causing unevenness on the lower surface. The depth of the concave pit is 5 - 10 mm, the bottom is rounded, and the connecting part with the casting mold cavity is an inclined slope with a slope of 30 - 60°.

[0057] The other inner sides of the outer frame mold 1 form the right side boundary, the front side boundary, and the rear side boundary of the casting mold cavity.

[0058] A height adjustment mechanism is provided on the lower side of the bottom mold 6 to adjust the relative height position between the outer frame mold 1 and the bottom mold 6, so that the height of the casting mold cavity can vary within the range of 5 - 30 mm.

[0059] In this embodiment, there are 5 adjustment holes 61 with a fixed depth on the lower surface of the bottom mold 6 at the four corners and the center position, which are matched with adjustment bolts 7 of different heights. During use, by adjusting the height of the adjustment bolts 7 used, the height of the casting mold cavity can be adjusted to vary within the range of 5 - 30 mm.

[0060] Embodiment Two:

[0061] As shown Figures 11 to 13 in the figure, the difference between this embodiment and the first embodiment lies in the different height adjustment mechanisms.

[0062] In this embodiment, four adjustment holes 611, 612, 613, and 614 with different depths are respectively opened at the four corners and the center position of the lower surface of the lower bottom die 6, and are matched with adjustment bolts 7 of corresponding heights. During use, by adjusting the matching relationship between the adjustment bolts 7 and the adjustment holes, the height of the casting cavity can be adjusted to vary within the range of 5 - 30 mm.

[0063] The above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention can still be modified or equivalently replaced, and any modification or partial replacement without departing from the spirit and scope of the present invention shall be covered by the scope of the claims of the present invention.

[0064] If terms such as "first" and "second" are used in this article to limit components, those skilled in the art should be aware that the use of "first" and "second" is only for the convenience of describing the present invention and simplifying the description. Without additional statements, the above terms have no special meanings.

[0065] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0066] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "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, and it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

Claims

1. A building block type aluminum alloy casting mold with riser and runner, characterized in that: It includes an outer frame mold, a side mold block, a pouring and riser mold assembly, an upper cover mold and a lower bottom mold, and the above components enclose a casting mold cavity; The outer frame mold is a rectangular ring; One or more side modules are provided, and the side modules and the pouring and rising mold assembly are arranged and placed at the left position in the outer frame mold. The side modules and the pouring and rising mold assembly have the same width and height. The relative position between the side modules and the pouring and rising mold assembly can be adjusted, and together they constitute the left boundary of the casting mold cavity; A pouring riser is provided on the pouring riser mold assembly, and the pouring riser is communicated with the casting mold cavity; The lower bottom mold is located at the lower side of the outer frame mold, and its size matches the inner diameter of the outer frame mold. The lower bottom mold constitutes the bottom side boundary of the casting mold cavity; the side module and the pouring and riser mold assembly are placed on the lower bottom mold, and a pit is provided on the lower bottom mold at a position corresponding to the pouring and riser; The upper cover mold is placed on the upper side of the outer frame mold, and the left side of the upper cover mold is in contact with the side mold block and the pouring and riser mold assembly; the upper cover mold constitutes the upper side boundary of the casting mold cavity; The other inner sides of the outer frame mold constitute the right side boundary, the front side boundary and the rear side boundary of the casting mold cavity.

2. The building block type aluminum alloy casting mold with riser and runner according to claim 1 is characterized in that: The side module is a rectangular block, and a bolt installation opening is opened on the upper surface of the side module.

3. The building block type aluminum alloy casting mold with riser and runner according to claim 1, characterized in that: The pouring and riser mold assembly is composed of two pouring and riser modules that are mirror-symmetrical, and a pouring and riser is formed between the two pouring and riser modules; The pouring riser includes a funnel-shaped pouring riser, a vertical runner, a straight runner and a trumpet-shaped straight runner. The diameter of the vertical runner is the same as the lower circle of the pouring riser and they are connected vertically. The straight runner is connected laterally with the vertical runner. The small end of the trumpet-shaped straight runner is connected horizontally with the straight runner. The large end of the trumpet-shaped straight runner is connected with the casting mold cavity. The funnel-shaped pouring riser, the vertical runner, the straight runner and the trumpet-shaped straight runner are divided into two symmetrical parts, and the two parts are respectively located on two pouring riser modules.

4. The building block type aluminum alloy casting mold with riser and runner according to claim 3 is characterized in that: The width of the horizontal runner is not less than 2 / 3 of the diameter of the vertical runner.

5. The building block type aluminum alloy casting mold with riser and runner according to claim 3 is characterized in that: The upper surface of the funnel-shaped pouring riser exceeds the upper surface of the casting mold cavity.

6. The modular aluminum alloy casting mold with riser and runner according to claim 1, characterized in that: The upper cover mold is composed of two mold cover plates. A semicircular cutout is respectively provided on the butt edges of the two mold cover plates at a position away from the pouring and riser. The two semicircular cutouts are spliced ​​into a cylindrical cavity, and the cylindrical cavity serves as an exhaust port.

7. The building block type aluminum alloy casting mold with riser and runner according to claim 1, characterized in that: The pit extends in the front-to-back direction, the bottom of the pit is rounded, and the part close to the casting cavity is an oblique slope.

8. The building block type aluminum alloy casting mold with riser and runner according to claim 1, characterized in that: A height adjustment mechanism is provided on the lower side of the lower bottom mold to adjust the relative height position between the lower bottom mold and the outer frame mold.

9. The modular aluminum alloy casting mold with riser and runner according to claim 8, characterized in that: The height adjustment mechanism comprises a plurality of adjustment holes opened on the lower side of the lower base mold, the depth of the adjustment holes is fixed, and a plurality of groups of adjustment bolts with different heights are provided.

10. The modular aluminum alloy casting mold with riser and runner according to claim 8, characterized in that: The height adjustment mechanism comprises a plurality of adjustment holes opened on the lower side of the lower bottom mold, each group of adjustment holes has a different depth and is equipped with an adjustment bolt for fixing the height.

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