Heating device for metal casting

Abstract

The utility model relates to the technical field of metal smelting equipment, in particular to a heating device for metal casting. The heating device is placed at the upper end of a mold containing molten metal, the upper end of the mold is open, the heating device comprises a support, a supporting plate is arranged on the upper side of a top plate of the support, a heating pipe is fixedly arranged on the supporting plate and communicates with an external air inlet pipeline, the heating pipe extends downwards to sequentially penetrate through the supporting plate and the top plate of the support, and a burner is arranged at the end of the heating pipe. The output end of the burner faces the molten metal in the mold, and a telescopic mechanism is arranged between the supporting plate and the top plate of the support and drives the supporting plate to move up and down. Molten metal which is placed in a mold and naturally dissipates heat is heated, the temperature of the molten metal is gradually decreased slowly, the casting quality of a metal ingot is improved, meanwhile, the supporting plate is driven by the telescopic mechanism to move up and down, the distance between the output end of the burner and the molten metal can be adjusted, the heating temperature is adjusted, and the use range of the device is widened.

Description

TECHNICAL FIELD

[0001] The utility model relates to metal smelting equipment technical field especially relates to a heating device for metal casting. BACKGROUND

[0002] When alloy metal is cast, the water cooling mode is mostly used to cool the metal melt in the mould, and then alloy ingot is obtained. However, when the alloy melt of some precious metal alloy (such as zinc-aluminum-magnesium alloy) is cooled by water, because the melting points and densities of different components in the alloy are different, the cooling speed in the mould is different. When the temperature changes too sharply, the following defects may occur: first, air holes appear in the center of the alloy ingot; second, blocky crystal spots and linear cracks appear on the ingot surface. SUMMARY

[0003] In order to solve the quality problem of the alloy ingot when the alloy melt is cooled by water, the utility model provides a heating device for metal casting. The metal melt placed in the mould is heated, the cooling speed of the metal melt is slowed down, the temperature of the metal melt decreases slowly, the alloy melt is uniformly solidified, the casting quality of the metal ingot is improved, and the distance between the output end of the combustion nozzle and the metal melt can be adjusted to adjust the heating temperature and improve the use range of the device.

[0004] In order to achieve the above purpose, the technical scheme of the utility model is as follows:

[0005] A heating device for metal casting is placed on the upper end of a mould containing metal melt. The upper end of the mould is provided with an opening. The heating device comprises a support. A support plate is arranged on the top of the support. A heating pipe is fixedly arranged on the support plate. The heating pipe is in communication with an external air inlet pipeline. The heating pipe extends downward and passes through the support plate and the top of the support in sequence. An end of the heating pipe is provided with a combustion nozzle. The heating pipe is slidably connected with the top of the support. The output end of the combustion nozzle faces the metal melt in the mould. An extension mechanism is arranged between the support plate and the top of the support. The extension mechanism drives the support plate to move up and down.

[0006] Further, the extension mechanism comprises a worm gear, a worm and a screw rod. The worm gear is in transmission connection with the worm. A vertical screw rod is threadedly connected in the worm gear. The lower end of the screw rod passes through the top of the support and is slidably connected with the top of the support. The upper end of the screw rod is fixedly arranged on the lower side of the support plate. An integral shell is arranged on the outer side of the worm gear and the worm. The shell is fixedly connected with the top of the support. The worm gear and the worm can rotate in the shell. When the worm rotates, the worm gear rotates. When the worm gear rotates, the screw rod connected with the worm gear rotates and moves up and down.

[0007] Further, the lower end of the support plate is fixed with a plurality of limiting columns, and the top plate of the support is provided with limiting cylinders matched with the limiting columns, and the end of the limiting column inserted into the limiting cylinder penetrates through the top plate of the support.

[0008] Further, the heating pipe comprises a plurality of vertical branch pipes, and the vertical branch pipes are uniformly arranged on the support plate.

[0009] Further, the top plate of the support is provided with a heat insulation plate below, and the heat insulation plate is fixedly connected with the heating pipe and located above the combustion nozzle.

[0010] Further, the end of the worm is provided with a rotating disc.

[0011] By the above technical scheme, the beneficial effects of the present application are as follows: the combustion nozzle is used to heat the metal melt placed in the mold and naturally cooled, the cooling speed of the metal melt is slowed down, the temperature of the metal melt is slowly decreased, the alloy melt is uniformly solidified, the alloy ingot with smooth and delicate surface is obtained, and the casting quality of the metal ingot is improved; when the worm is manually rotated, the worm gear is driven to rotate, the screw rod connected with the worm gear in the middle is rotated and moves up and down, the support plate, the heating pipe and the combustion nozzle are driven to move up and down, the distance between the output end of the combustion nozzle and the metal melt is adjusted, the heating temperature is adjusted, and the use range of the device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a structural schematic view of the heating device for metal casting;

[0013] Figure 2 It is a front view of the heating device for metal casting without heating pipe;

[0014] Figure 3 It is a structural schematic view of the heating pipe of the heating device for metal casting;

[0015] Figure 4 It is a side view of the heating device for metal casting placed on the mold.

[0016] Reference signs in the drawings: 1 is a support, 2 is a support plate, 3 is a heating pipe, 4 is a combustion nozzle, 5 is a worm gear, 6 is a worm, 7 is a screw rod, 8 is a limiting column, 9 is a limiting cylinder, 10 is a mold, 11 is a heat insulation plate, and 12 is a rotating disc. DETAILED DESCRIPTION

[0017] The present application will be further described in combination with the drawings and specific embodiments:

[0018] As Figures 1 to 4 As shown, this embodiment provides a heating device for metal casting, which is placed on the upper end of a mold 10 containing molten metal. The upper end of the mold 10 is open. The heating device includes a bracket 1. The four supporting legs at the lower portion of the bracket 1 are placed on the upper edge of the mold 10. A support plate 2 is provided on the upper side of the top plate of the bracket 1. A heating tube 3 is fixedly provided on the support plate 2. The heating tube 3 is connected to an external air intake pipeline. The heating tube 3 extends downward and passes through the support plate 2 and the top plate of the bracket 1 in sequence. A burner 4 is provided at the end of the heating tube 3. The heating tube 3 is slidably connected to the top plate of the bracket 1. The output end of the burner 4 faces the molten metal in the mold 10.

[0019] In this embodiment, the heating pipe 3 includes a plurality of vertical branch pipes, which are evenly arranged on the support plate 2 . The plurality of branch pipes are connected to the main pipe through horizontal pipes to form a uniform heating system for the heating pipe 3 .

[0020] A telescopic mechanism is provided between the support plate 2 and the top plate of the bracket 1 , and the telescopic mechanism drives the support plate 2 to move up and down.

[0021] Specifically, the telescopic mechanism includes a worm gear 5, a worm 6 and a screw 7. The worm gear 5 is transmission-connected to the worm 6. A vertical screw 7 is threadedly connected to the worm gear 5. The lower end of the screw 7 passes through the top plate of the bracket 1 and is slidingly connected to it, and the upper end is fixed to the lower side of the support plate 2.

[0022] In this embodiment, an integrally formed housing is provided outside the worm gear 5 and worm 6. The housing is fixedly connected to the top plate of the bracket 1, allowing the worm gear 5 and worm 6 to rotate within the housing. A turntable 12 is fixed to the end of the worm 6 away from the worm gear 5. Manual rotation of the turntable 12 drives the worm 6, which in turn rotates the worm gear 5, which is in transmission connection with the worm 6, thereby driving the screw 12 to rotate up and down. A limit cylinder is fixed at the connection between the lower side of the support plate 2 and the screw 12. The screw 12 extends into the limit cylinder, where it rotates and lifts the support plate 2. In other embodiments, the telescopic mechanism can also directly use telescopic equipment such as a pneumatic cylinder or oil cylinder.

[0023] A plurality of limiting posts 8 are fixed to the lower end of the support plate 2. A limiting cylinder 9 is provided on the top plate of the bracket 1 to cooperate with the limiting posts 8. One end of the limiting post 8 extends into the limiting cylinder 9 and passes through the top plate of the bracket 1. In this embodiment, there are four limiting posts 8 evenly distributed on the lower side of the support plate 2. When the screw 12 drives the support plate 2 up and down, the limiting posts 8 and the top plate of the bracket 1 slide relative to each other.

[0024] A heat shield 11 is installed below the top plate of the bracket 1. This shield 11 is fixedly connected to the heating tube 3 and located above the burner 4. This shield isolates the burner 4 and the molten alloy below from the components above, protecting them from heat damage. Furthermore, the bracket 1 in this device is constructed of steel, effectively extending its service life.

[0025] In this embodiment, the heating device heats the mold 10 in which the alloy melt is cast in a room temperature environment for 40 to 50 minutes, and then the burner 4 and the heating tube 3 can be closed to stop heating. The alloy ingot can be taken out after being placed for a period of time to obtain a precious metal alloy ingot of better quality.

[0026] When in use, the four supporting legs of the bracket 1 are placed on the edge of the mold 10 so that the burner nozzles 4 can be evenly distributed facing the upper opening of the mold 10. At this time, the turntable 12 is manually rotated to drive the worm 6 to rotate, and the worm wheel 5 connected to the worm 6 rotates, thereby driving the screw 12 to rotate up and down to adjust the distance between the output end of the burner nozzle 4 and the molten metal, and then adjust the heating temperature of the alloy melt. After heating for a period of time, the burner nozzle 4 can be turned off. After the alloy ingot has been placed for a period of time, the heating device can be removed from the mold 10, and then the alloy ingot can be taken out.

[0027] The embodiments described above are only preferred embodiments of the present invention and do not limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structure, features and principles described in the patent scope of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A heating device for metal casting, placed on the upper end of a mold (10) containing molten metal, wherein the upper end of the mold (10) is open, and characterized in that: The heating device comprises a bracket (1), a support plate (2) is provided on the upper side of the top plate of the bracket (1), a heating tube (3) is fixedly provided on the support plate (2), the heating tube (3) is connected to an external air inlet pipeline, the heating tube (3) extends downward and passes through the support plate (2) and the top plate of the bracket (1) in sequence, and a burner (4) is provided at the end thereof, the heating tube (3) is slidably connected to the top plate of the bracket (1), and the output end of the burner (4) faces the molten metal in the mold (10); A telescopic mechanism is provided between the support plate (2) and the top plate of the bracket (1), and the telescopic mechanism drives the support plate (2) to move up and down.

2. A heating device for metal casting according to claim 1, characterized in that: The telescopic mechanism comprises a worm wheel (5), a worm (6) and a screw (7), wherein the worm wheel (5) is transmission-connected to the worm (6), a vertical screw (7) is threadedly connected to the worm wheel (5), the lower end of the screw (7) passes through the top plate of the bracket (1) and is slidably connected thereto, and the upper end is fixed to the lower side of the support plate (2).

3. A heating device for metal casting according to any one of claims 1 or 2, characterized in that: A plurality of limiting columns (8) are fixed to the lower end of the support plate (2), and a limiting cylinder (9) cooperating with the limiting columns (8) is provided on the top plate of the bracket (1), and one end of the limiting column (8) extends into the limiting cylinder (9) and passes through the top plate of the bracket (1).

4. A heating device for metal casting according to claim 1, characterized in that: The heating pipe (3) comprises a plurality of vertical branch pipes, and the vertical branch pipes are evenly arranged on the support plate (2).

5. The metal casting heating device according to claim 1, characterized in that: A heat insulation plate (11) is provided below the top plate of the bracket (1), and the heat insulation plate (11) is fixedly connected to the heating tube (3) and is located above the burner nozzle (4).

6. A heating device for metal casting according to claim 2, characterized in that: A rotating disc (12) is provided at the end of the worm (6).

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