Magnesium alloy surface coating device

Abstract

The utility model relates to the technical field of magnesium alloy coating, in particular to a magnesium alloy surface coating device, which comprises a shell, a coating layer and a coating layer, the liquid storage box is arranged on the lower portion of the interior of the cavity, an oil removing chamber, an alkali washing chamber, a water washing chamber and a coating chamber are sequentially formed in the liquid storage box, and the oil removing chamber is used for removing oil stains on the surface of the casting; the alkali washing chamber is used for washing off alkali-soluble impurities on the surface of the casting; the washing chamber is used for washing off the alkaline solution; the coating chamber is used for coating the surface of the casting; the fixing ring is arranged right above the deoiling chamber and is used for driving the casting to move; and the adjusting device is fixedly connected with the fixing ring and is used for driving the fixing ring to move. During coating, by operating the adjusting device, the adjusting device can push the castings to move to the next step in sequence through the fixing ring; the magnesium alloy casting can be rapidly carried to the next procedure, and the coating efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of magnesium alloy coating, in particular to a magnesium alloy surface coating device. Background Art

[0002] Magnesium alloy castings are alloys composed of magnesium and other elements. Their characteristics are: low density (1.8g / cm 3 About), high strength, large elastic modulus, good heat dissipation, good shock absorption, and greater impact load bearing capacity than aluminum alloy. In order to improve the corrosion resistance of magnesium alloy castings, the surface of magnesium alloy castings needs to be plated during the production process of magnesium alloy castings, which requires the use of a magnesium alloy surface coating device.

[0003] However, the existing magnesium alloy surface coating device needs to go through the processes of degreasing, alkali washing and cleaning in sequence before coating. However, since the castings need to be manually moved when passing through these steps, the transportation process is relatively time-consuming and the magnesium alloy castings cannot be quickly transported to the next process, thereby reducing the efficiency of coating. Utility Model Content

[0004] The utility model aims to solve the problem that the existing magnesium alloy surface coating device cannot quickly transport the magnesium alloy casting to the next process, resulting in reduced coating efficiency.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A magnesium alloy surface coating device, comprising:

[0007] A shell body, forming a cavity inside;

[0008] A liquid storage box is arranged at the lower part of the cavity, and the interior of the liquid storage box sequentially forms a degreasing chamber, an alkali washing chamber, a water washing chamber and a coating chamber, wherein the degreasing chamber is used to remove oil stains on the surface of the casting; the alkali washing chamber is used to wash away alkali-soluble impurities on the surface of the casting; the water washing chamber is used to wash away the alkaline solution; and the coating chamber is used to coat the surface of the casting;

[0009] A fixed ring, arranged just above the degreasing chamber, for driving the casting to move;

[0010] An adjusting device, fixedly connected to the fixing ring, and used for driving the fixing ring to move;

[0011] The air drying device is arranged above the coating chamber and is used for air drying the coating-finished castings.

[0012] Preferably, the adjusting device comprises:

[0013] A threaded rod is disposed above the interior of the cavity, with both ends of the threaded rod passing through the shell and being rotatably connected to the shell;

[0014] A first motor, wherein an output end of the first motor is fixedly connected to an end of the threaded rod close to the coating chamber, and is used to drive the threaded rod to rotate;

[0015] A nut, disposed just above the fixing ring and threadedly connected to the threaded rod;

[0016] A support plate, disposed below the nut and fixedly connected to the nut;

[0017] A second motor is disposed below the support plate, and a surface of the second motor is fixedly connected to the support plate;

[0018] A rotating disk, the axis of which is fixedly connected to the output end of the second motor; a cylindrical pin is provided on the surface of the rotating disk;

[0019] A slot plate, wherein a slide groove is provided on the surface of the slot plate and is slidably connected with the cylindrical pin through the slide groove;

[0020] Two groups of vertical rods are arranged below the slot plate and on both sides of the fixing ring, and the top ends of the two groups of vertical rods are fixedly connected to the slot plate;

[0021] Two sets of limit blocks are arranged at two ends of the slot plate and are fixedly connected to the slot plate;

[0022] Two groups of limiting rods, each group of limiting rods passes through the corresponding position of the limiting block and is slidably connected to the limiting block, and the top end of the limiting rod is fixedly connected to the support plate.

[0023] Preferably, the air-drying device comprises:

[0024] A first rack, one side of which is fixedly connected to the housing;

[0025] A first gear, disposed on the other side of the first rack and meshingly connected with the first rack;

[0026] An electric push rod, the output end of which is rotatably connected to the axis of the first gear;

[0027] A hot air pipe, wherein a side of the hot air pipe close to the first gear is arranged on a hinge seat, and the hinge seat is fixedly connected to the axis of the first gear;

[0028] The fan blades are arranged inside the hot air pipe;

[0029] A third motor, wherein an output end of the third motor is fixedly connected to the fan blades, and is used for driving the fan blades to rotate.

[0030] Preferably, the air-drying device further comprises: an electric heating plate; the electric heating plate is arranged inside the hot air pipe and is used for heating the blown air.

[0031] Preferably, a door is provided on the surface of the shell for taking in and placing castings.

[0032] Preferably, a plurality of connecting pipes are provided on the surface of the liquid storage box for replacing the liquid in the liquid storage box.

[0033] Preferably, it further comprises: an auxiliary cleaning device; the auxiliary cleaning device is arranged inside the cavity and located on a side of the liquid storage box close to the degreasing chamber, so as to increase the cleaning speed.

[0034] Preferably, the auxiliary cleaning device comprises:

[0035] An air pipe, the surface of which is sequentially connected to the degreasing chamber, the alkali washing chamber and the water washing chamber;

[0036] The fan has an output end connected to an end of the air pipe close to the degreasing chamber, and an input end of the fan connected to the outside.

[0037] Preferably, it further comprises: a lifting device; the lifting device is arranged inside the coating chamber and is used for lifting the casting.

[0038] Preferably, the lifting device comprises:

[0039] A filter plate, wherein a plurality of through holes are formed on the surface of the filter plate;

[0040] A connecting rod, one end of which is fixedly connected to the filter plate;

[0041] A second rack is disposed at the other end of the connecting rod and is fixedly connected to the connecting rod;

[0042] A second gear meshingly connected with the second rack;

[0043] A fourth motor, wherein an output end of the fourth motor is fixedly connected to the axis of the second gear.

[0044] The beneficial effect of the utility model is that when plating, by operating the adjusting device, the adjusting device will push the casting to the next step in sequence through the fixing ring, so that the magnesium alloy casting can be quickly transported to the next process, thereby improving the efficiency of plating. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a schematic diagram of the structure of the utility model;

[0046] Figure 2 for Figure 1 Schematic diagram of the cross-section plane along the midline CC;

[0047] Figure 3 for Figure 1 Center right view plan view;

[0048] Figure 4 for Figure 2 Explosion diagram of the middle part connection structure;

[0049] Figure 5 for Figure 2 Schematic diagram of the connection structure at A in the middle;

[0050] Figure 6 for Figure 2 Schematic diagram of the connection structure at B in the middle.

[0051] In the figure: 1, shell, 2, liquid storage box, 3, fan, 4, air pipe, 5, threaded rod, 6, first motor, 7, nut, 8, support plate, 9, second motor, 10, turntable, 11, slot plate, 12, vertical rod, 13, fixing ring, 14, limit block, 15, limit rod, 16, first rack, 17, first gear, 18, electric push rod, 19, hot air duct, 20, fan blade, 21, third motor, 22, electric heating plate, 23, filter plate, 24, connecting rod, 25, second rack, 26, second gear, 27, fourth motor. DETAILED DESCRIPTION

[0052] The utility model is further described below in conjunction with the accompanying drawings:

[0053] This embodiment:

[0054] See also Figure 1-6 In this embodiment: a magnesium alloy surface coating device includes: a shell 1, a liquid storage box 2, a fixing ring 13, an adjusting device and an air drying device.

[0055] A cavity is formed inside the shell 1; a liquid storage box 2 is arranged at the lower part of the cavity, and a degreasing chamber, an alkali washing chamber, a water washing chamber and a coating chamber are formed in the liquid storage box 2 in sequence.

[0056] The degreasing chamber is used to remove oil stains on the surface of the casting. The degreasing chamber is filled with acetone solution, which can decompose the oil stains.

[0057] The alkali washing chamber is used to wash away the alkali-soluble impurities on the surface of the casting. The alkali washing chamber is filled with an alkaline solution to prevent premature oxidation.

[0058] The water washing room is used to wash away the alkaline solution; the plating room is used to plate the surface of the casting. The plating room is filled with chromium-free chemical conversion liquid, which can form a protective layer on the surface of the casting to achieve plating.

[0059] The fixing ring 13 is arranged just above the degreasing chamber and is used to drive the casting to move. A through hole with a thick top and a thin bottom is opened on the fixing ring 13. The casting is in the shape of a truncated cone and can be placed upside down in the through hole.

[0060] The adjusting device is fixedly connected to the fixing ring 13 and is used to drive the fixing ring 13 to move. The adjusting device can make the fixing ring 13 move downward first, then move upward after cleaning, and finally move horizontally to move the fixing ring 13 to the next step; the air-drying device is arranged above the coating chamber and is used to air-dry the coating-finished castings. The air-drying device air-dries the castings in all directions by changing the blowing angle.

[0061] In this embodiment, Figure 2 , Figure 4 and Figure 5 As shown, the adjusting device includes: a threaded rod 5, a first motor 6, a nut 7, a support plate 8, a second motor 9, a turntable 10, a slot plate 11, two groups of vertical rods 12, two groups of limit blocks 14 and two groups of limit rods 15.

[0062] Specifically, the threaded rod 5 is arranged above the inside of the cavity, and both ends of the threaded rod 5 pass through the shell 1 and are rotatably connected to the shell 1; the output end of the first motor 6 is fixedly connected to the end of the threaded rod 5 close to the coating chamber, which is used to drive the threaded rod 5 to rotate. The model of the first motor 6 is selected according to actual needs and meets the working conditions; the nut 7 is arranged directly above the fixing ring 13 and is threadedly connected to the threaded rod 5.

[0063] In this embodiment, when the threaded rod 5 rotates, the nut 7 will move horizontally, and the upper part of the nut 7 will be slidably connected with the housing 1 to limit the nut 7 to move horizontally.

[0064] The support plate 8 is arranged below the nut 7 and is fixedly connected to the nut 7. The nut 7 also drives the support plate 8 to move horizontally. The second motor 9 is arranged below the support plate 8, and the surface of the second motor 9 is fixedly connected to the support plate 8. The model of the second motor 9 is selected according to actual needs and meets the working conditions. The axis of the turntable 10 is fixedly connected to the output end of the second motor 9. A cylindrical pin is arranged on the surface of the turntable 10. A slide groove is opened on the surface of the slot plate 11, and is slidably connected to the cylindrical pin through the slide groove.

[0065] In this embodiment, the second motor 9 drives the turntable 10 to rotate, and the turntable 10 causes the cylindrical pin to perform a circular motion, and the cylindrical pin slides with the slide groove to cause the slot plate 11 to move vertically downward.

[0066] The two groups of vertical rods 12 are both arranged below the slot plate 11 and located on both sides of the fixing ring 13. The top ends of the two groups of vertical rods 12 are fixedly connected to the slot plate 11, and the slot plate 11 drives the vertical rods 12 to move vertically; the two groups of limit blocks 14 are arranged at both ends of the slot plate 11 and are fixedly connected to the slot plate 11; each group of limit rods 15 passes through the corresponding positions of the limit blocks 14 and is slidably connected to the limit blocks 14, and the top ends of the limit rods 15 are fixedly connected to the support plate 8, and the limit rods 15 will limit the limit blocks 14 to only move vertically.

[0067] First start the second motor 9, and the output end of the second motor 9 drives the turntable 10 to rotate half a circle; the turntable 10 makes the cylindrical pin do circular motion, and the cylindrical pin makes the slot plate 11 move vertically downward by sliding with the slide slot; the slot plate 11 drives the limit block 14 to move, and the limit block 14 will move under the restriction of the limit rod 15; at the same time, the slot plate 11 will drive the vertical rod 12 to move; the vertical rod 12 pushes the casting downward through the fixing ring 13, and sends the casting to the liquid storage tank 2; after completing the cleaning of this step, the second motor 9 is rotated half a circle again to lift the casting; and the first motor 6 is started, and the output end of the first motor 6 drives the threaded rod 5 to rotate; the threaded rod 5 makes the nut 7 move horizontally; the nut 7 drives the entire structure to move horizontally through the support plate 8; thereby moving the casting to the next step; realizing the rapid transportation of the magnesium alloy casting to the next process, improving the efficiency of the coating.

[0068] When the casting is air-dried, the blowing direction of the wind will not change, causing the rest of the casting to dry more slowly, reducing the efficiency of the coating.

[0069] In this embodiment, Figure 3 and Figure 6 As shown, the air drying device includes: a first rack 16 , a first gear 17 , an electric push rod 18 , a hot air pipe 19 , fan blades 20 and a third motor 21 .

[0070] One side of the first rack 16 is fixedly connected to the housing 1 ; the first gear 17 is disposed on the other side of the first rack 16 and meshedly connected to the first rack 16 .

[0071] In this embodiment, when the first gear 17 moves vertically, it will rotate under the restriction of the first rack 16. At the same time, when the first gear 17 is stationary, the first rack 16 will also support the first gear 17.

[0072] The output end of the electric push rod 18 is rotatably connected to the axis of the first gear 17. The electric push rod 18 can push the first gear 17 to move vertically. The model of the electric push rod 18 is selected according to actual needs and meets the working conditions. The hot air pipe 19 is arranged on a hinged seat on the side close to the first gear 17, and the hinged seat is fixedly connected to the axis of the first gear 17. When the first gear 17 rotates, it will drive the hot air pipe 19 to rotate; the fan blades 20 are arranged inside the hot air pipe 19; the output end of the third motor 21 is fixedly connected to the fan blades 20, which is used to drive the fan blades 20 to rotate. The model of the third motor 21 is selected according to actual needs and meets the working conditions.

[0073] When air drying is required, the third motor 21 is started; the output end of the third motor 21 drives the fan blades 20 to rotate, thereby blowing out air; at this time, the electric push rod 18 is adjusted so that the output end of the electric push rod 18 pushes the first gear 17 to move vertically downward; the first gear 17 will rotate downward under the restriction of the first rack 16; the first rack 16 will drive the hot air pipe 19 to rotate; thereby driving the third motor 21 and the fan blades 20 to rotate; the wind direction is adjusted, the air drying range of the casting is increased, and then the air drying speed is increased, and the efficiency of the coating is improved.

[0074] The air drying device also includes: an electric heating plate 22; the electric heating plate 22 is arranged inside the hot air pipe 19, and is used to heat the blown air. The heating of the electric heating plate 22 increases the temperature of the blown air, further improving the air drying speed.

[0075] The surface of the housing 1 is provided with a door for taking in and placing castings.

[0076] A plurality of connecting pipes are arranged on the surface of the liquid storage box 2 for replacing the liquid in the liquid storage box 2 .

[0077] During cleaning, the liquid in the liquid storage box 2 remains stationary, resulting in limited cleaning efficiency.

[0078] In order to solve the above problems, an implementation method of this embodiment is proposed, in which the magnesium alloy surface coating device also includes: an auxiliary cleaning device; the auxiliary cleaning device is arranged inside the cavity and is located on the side of the liquid storage box 2 close to the degreasing chamber, for increasing the cleaning speed.

[0079] In this embodiment, Figure 2 As shown, the auxiliary cleaning device includes: an air pipe 4 and a fan 3.

[0080] Specifically, the surface of the air pipe 4 is connected with the degreasing chamber, the alkali washing chamber and the water washing chamber in sequence; the output end of the fan 3 is connected with the end of the air pipe 4 close to the degreasing chamber, and the input end of the fan 3 is connected with the outside world. The model of the fan 3 is selected according to actual needs and meets the working conditions.

[0081] Start the fan 3; the output end of the fan 3 draws in external air and sends it to the degreasing chamber, alkali washing chamber and water washing chamber through the air pipe 4; this causes the liquid inside the liquid storage box 2 to fluctuate, thereby increasing the contact frequency between the liquid and the casting, thereby improving the cleaning efficiency.

[0082] Since the casting is always in contact with the fixing ring 13 during the coating, a protective film cannot be formed on the contact surface between the casting and the fixing ring 13 .

[0083] In order to solve the above problems, an implementation method of this embodiment is proposed, where the magnesium alloy surface coating device also includes: a lifting device; the lifting device is arranged inside the coating chamber and is used to lift the casting.

[0084] In this embodiment, Figure 2 As shown, the lifting device includes: a filter plate 23, a connecting rod 24, a second rack 25, a second gear 26 and a fourth motor 27.

[0085] Among them, a plurality of through holes are provided on the surface of the filter plate 23; one end of the connecting rod 24 is fixedly connected to the filter plate 23, and the connecting rod 24 can drive the filter plate 23 to move vertically; the second rack 25 is arranged at the other end of the connecting rod 24 and is fixedly connected to the connecting rod 24, and the second rack 25 drives the connecting rod 24 to move vertically; the second gear 26 is meshed and connected with the second rack 25, and when the second gear 26 rotates, the second rack 25 will move vertically; the output end of the fourth motor 27 is fixedly connected to the axis of the second gear 26, and the output end of the fourth motor 27 drives the second gear 26 to rotate. The model of the fourth motor 27 is selected according to actual needs and can meet the working conditions.

[0086] After the casting enters the coating chamber, the fourth motor 27 is started; the output end of the fourth motor 27 drives the second gear 26 to rotate; the second gear 26 causes the second rack 25 to move vertically upward; the second rack 25 simultaneously drives the connecting rod 24 to move; the connecting rod 24 drives the filter plate 23 to move, and the filter plate 23 lifts the casting upward, so that there is a gap between the casting and the fixing ring 13, and a protective layer can be formed on the surface of the filter plate 23.

[0087] Working principle:

[0088] When the magnesium alloy surface coating device is in use, the user opens the box door and puts the casting upside down into the fixing ring 13; then, the second motor 9 is started first, and the output end of the second motor 9 drives the turntable 10 to rotate half a circle; the turntable 10 makes the cylindrical pin do circular motion, and the cylindrical pin makes the slot plate 11 move vertically downward by sliding between the slot and the slide; the slot plate 11 drives the limit block 14 to move, and the limit block 14 will move under the restriction of the limit rod 15; at the same time, the slot plate 11 will drive the vertical rod 12 to move; the vertical rod 12 pushes the casting to move downward through the fixing ring 13, and sends the casting to the liquid storage box 2; after completing the cleaning of this step, the second motor 9 is rotated half a circle again to lift the casting; and the first motor 6 is started, and the output end of the first motor 6 drives the threaded rod 5 to rotate; the threaded rod 5 makes the nut 7 move horizontally; the nut 7 drives the entire structure to move horizontally through the support plate 8; thereby the casting is moved to the next step; the magnesium alloy casting can be quickly transported to the next process, thereby improving the efficiency of the coating.

[0089] During this process, the fan 3 is started; the output end of the fan 3 draws in external air and sends it to the degreasing chamber, alkali washing chamber and water washing chamber through the air pipe 4; the liquid inside the liquid storage tank 2 fluctuates, increasing the contact frequency between the liquid and the casting, thereby improving the cleaning efficiency.

[0090] After the casting enters the coating chamber, the fourth motor 27 is started; the output end of the fourth motor 27 drives the second gear 26 to rotate; the second gear 26 causes the second rack 25 to move vertically upward; the second rack 25 simultaneously drives the connecting rod 24 to move; the connecting rod 24 drives the filter plate 23 to move, and the filter plate 23 lifts the casting upward, so that there is a gap between the casting and the fixing ring 13, and a protective layer can be formed on the surface of the filter plate 23.

[0091] After the coating is completed, the casting is lifted and the third motor 21 is started; the output end of the third motor 21 drives the fan blades 20 to rotate, thereby blowing out wind; at this time, the electric push rod 18 is adjusted so that the output end of the electric push rod 18 pushes the first gear 17 to move vertically downward; the first gear 17 will rotate downward under the restriction of the first rack 16; the first rack 16 will drive the hot air pipe 19 to rotate; thereby driving the third motor 21 and the fan blades 20 to rotate; the wind direction is adjusted, the air drying range of the casting is increased, and then the air drying speed is increased, the efficiency of the coating is improved, and the use of this device is completed.

[0092] Although the present invention has been shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A magnesium alloy surface coating device, characterized in that: include: A housing (1) having a cavity formed therein; A liquid storage box (2) is arranged at the lower part of the cavity, and the interior of the liquid storage box (2) sequentially forms an oil removal chamber, an alkali washing chamber, a water washing chamber and a coating chamber, wherein the oil removal chamber is used to remove oil stains on the surface of the casting; the alkali washing chamber is used to wash away alkali-soluble impurities on the surface of the casting; the water washing chamber is used to wash away the alkaline solution; and the coating chamber is used to coat the surface of the casting; A fixing ring (13) is arranged just above the degreasing chamber and is used to drive the casting to move; An adjusting device, fixedly connected to the fixing ring (13), and used for driving the fixing ring (13) to move; The air drying device is arranged above the coating chamber and is used for air drying the coating-finished castings.

2. The magnesium alloy surface coating device according to claim 1, characterized in that: The regulating device comprises: A threaded rod (5) is arranged above the interior of the cavity, and both ends of the threaded rod (5) penetrate the shell (1) and are rotatably connected to the shell (1); a first motor (6), wherein an output end of the first motor (6) is fixedly connected to an end of the threaded rod (5) close to the coating chamber, and is used to drive the threaded rod (5) to rotate; A nut (7), which is arranged directly above the fixing ring (13) and is threadedly connected to the threaded rod (5); A support plate (8) is disposed below the nut (7) and is fixedly connected to the nut (7); A second motor (9) is arranged below the support plate (8), and a surface of the second motor (9) is fixedly connected to the support plate (8); A rotating disk (10), the axis of which is fixedly connected to the output end of the second motor (9); a cylindrical pin is provided on the surface of the rotating disk (10); A slot plate (11), wherein a sliding groove is provided on the surface of the slot plate (11) and is slidably connected to the cylindrical pin via the sliding groove; Two groups of vertical rods (12) are both arranged below the slot plate (11) and located on both sides of the fixing ring (13), and the top ends of the two groups of vertical rods (12) are fixedly connected to the slot plate (11); Two groups of limit blocks (14) are arranged at two ends of the slot plate (11) and are fixedly connected to the slot plate (11); Two groups of limiting rods (15), each group of limiting rods (15) passes through corresponding positions of the limiting blocks (14) and is slidably connected to the limiting blocks (14), and the top ends of the limiting rods (15) are fixedly connected to the support plate (8).

3. The magnesium alloy surface coating device according to claim 1, characterized in that: The air drying device comprises: A first rack (16), one side of the first rack (16) being fixedly connected to the housing (1); A first gear (17), arranged on the other side of the first rack (16) and meshingly connected with the first rack (16); An electric push rod (18), the output end of which is rotatably connected to the axis of the first gear (17); A hot air pipe (19), wherein a side of the hot air pipe (19) close to the first gear (17) is arranged on a hinge seat, and the hinge seat is fixedly connected to the axis of the first gear (17); A fan blade (20) is arranged inside the hot air pipe (19); A third motor (21), wherein an output end of the third motor (21) is fixedly connected to the fan blade (20) and is used to drive the fan blade (20) to rotate.

4. The magnesium alloy surface coating device according to claim 3, characterized in that: The air drying device further comprises: an electric heating plate (22); the electric heating plate (22) is arranged inside the hot air pipe (19) and is used to heat the blown air.

5. The magnesium alloy surface coating device according to claim 1, characterized in that: The surface of the housing (1) is provided with a door for taking in and placing castings.

6. The magnesium alloy surface coating device according to claim 1, characterized in that: A plurality of connecting pipes are arranged on the surface of the liquid storage box (2) for replacing the liquid in the liquid storage box (2).

7. The magnesium alloy surface coating device according to claim 1, characterized in that: Also includes: Auxiliary cleaning device; the auxiliary cleaning device is arranged inside the cavity and is located on a side of the liquid storage box (2) close to the degreasing chamber, and is used to increase the cleaning speed.

8. The magnesium alloy surface coating device according to claim 7, characterized in that: The auxiliary cleaning device comprises: An air pipe (4), the surface of which is sequentially connected to the degreasing chamber, the alkali washing chamber and the water washing chamber; A fan (3), wherein the output end of the fan (3) is connected to an end of the air pipe (4) close to the degreasing chamber, and the input end of the fan (3) is connected to the outside.

9. The magnesium alloy surface coating device according to claim 1, characterized in that: Also includes: Lifting device; the lifting device is arranged inside the coating chamber and is used to lift the casting.

10. The magnesium alloy surface coating device according to claim 9, characterized in that: The lifting device comprises: A filter plate (23), wherein a plurality of through holes are formed on the surface of the filter plate (23); A connecting rod (24), one end of which is fixedly connected to the filter plate (23); A second rack (25) is disposed at the other end of the connecting rod (24) and is fixedly connected to the connecting rod (24); A second gear (26) meshingly connected with the second rack (25); A fourth motor (27), wherein an output end of the fourth motor (27) is fixedly connected to the axis of the second gear (26).

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