Low-temperature metallization vacuum coating process and equipment for ABS (acrylonitrile-butadiene-styrene) plastic part

Abstract

The invention discloses an ABS plastic part low-temperature metallization vacuum coating process and equipment. The equipment comprises a machine body, a coating tank is embedded in the machine body, a side plate is fixedly installed at the upper end of the machine body, a storage rack is movably installed in the coating tank, an operation ring is movably installed in the coating tank, and the side face of the operation ring is movably connected with a threaded rod through threads. The stable coating equipment is arranged, a plastic part is placed in a storage rack in the vacuum coating equipment, a plasma cleaning opening in the upper end of an operation ring is used for cleaning the surface of the plastic part and removing grease and impurities on the surface, and a temperature controller is installed in the equipment and used for controlling the internal temperature; when the temperature is too high, the liquid nitrogen cooling system is used for cooling, the high-power pulse magnetron sputtering device mounted at the upper end of the operation ring is used for coating a plastic part and depositing a metal layer, finally, ultraviolet curing treatment is performed, and meanwhile, the high-power pulse magnetron sputtering technology is adopted, so that the pollution to the environment is reduced, and the coating precision is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high polymer material surface treatment, in particular to an ABS plastic part low-temperature metallization vacuum coating process and equipment BACKGROUND

[0002] Vacuum coating refers to a method of heating metal or non-metal materials under high vacuum conditions to evaporate and condense on the surface of the coated part to form a thin film. Vacuum coating is an important aspect of vacuum application field, which is based on vacuum technology, uses physical or chemical methods, and absorbs a series of new technologies such as electron beam, molecular beam, ion beam, plasma beam, radio frequency and magnetic control, to provide a new process for thin film preparation for scientific research and actual production. The method of evaporating or sputtering metal alloy or compound in vacuum, and then condensing and depositing on the object to be coated.

[0003] The existing coating technology adopts traditional high-temperature PVD process and wet electroplating process. The traditional high-temperature PVD process heats the substrate, deposits a metal layer by magnetic sputtering or evaporation coating, and deforms the plastic part under the influence of high temperature, resulting in low yield. The wet electroplating process uses chemical drugs, pollutes the environment, and has a complex process flow, resulting in uneven thickness of the coating layer and affecting the quality of the finished product. SUMMARY

[0004] In order to overcome the defects in the prior art, the present application provides an ABS plastic part low-temperature metallization vacuum coating process and equipment, which solves the problems of the application range of ABS substrate limited by the traditional high-temperature PVD process and the pollution, high cost and insufficient adhesion of the film layer of the wet process.

[0005] The technical scheme adopted by the present application to solve its technical problems is: an ABS plastic part low-temperature metallization vacuum coating equipment, comprising a body, a coating tank is embedded and installed in the inside of the body, a side plate is fixedly installed at the upper end of the body, a storage rack is movably installed in the inside of the coating tank, an operating ring is movably installed in the inside of the coating tank, a threaded rod is movably connected to the side of the operating ring through threads, a second gear is installed at the bottom end of the threaded rod, a first motor is fixedly installed in the inside of the body, a first gear is installed at the output end of the first motor, the first gear is engaged with the second gear, a pulse head and a plasma cleaning port are fixedly installed at the upper end of the operating ring, and a liquid nitrogen cooling pipe is fixedly installed at the inside of the coating tank.

[0006] The above-mentioned ABS plastic part low-temperature metallization vacuum coating process and equipment, a vacuum pump is fixedly installed in the inside of the body, a liquid nitrogen tank and a gas tank are fixedly installed in the inside of the body, an evacuation pipe is fixedly installed at the upper end of the body, and one end of the evacuation pipe is in through connection with the coating tank.

[0007] The ABS plastic part low-temperature metallization vacuum coating process and equipment, one end of the evacuation pipe is fixedly installed with a control valve between the vacuum pump, the other end of the evacuation pipe is movably installed with a connecting ring, the output end of the liquid nitrogen tank is throughly connected with the coating tank, the upper end of the gas tank is fixedly installed with a gas conveying pipe, one end of the gas conveying pipe is throughly connected with the coating tank.

[0008] The ABS plastic part low-temperature metallization vacuum coating process and equipment, the side plate comprises a sliding rod, a sliding plate, a second motor, a bearing plate, a connecting chain, a hydraulic rod, the sliding rod is symmetrically installed on the side of the side plate, the sliding plate is movably installed on the outside of the sliding rod, the output end of the second motor is movably connected with the top end of the hydraulic rod, the bearing plate is fixedly installed on the outside of the output end of the second motor, and the connecting chain is fixedly installed on one end of the bearing plate.

[0009] The ABS plastic part low-temperature metallization vacuum coating process and equipment, the coating tank comprises a storage rack, a storage groove, an operating ring, a first gear, a second gear, a threaded rod, a bearing disc, a positioning groove, a pulse head, a plasma cleaning port, a ring sliding groove, a first sliding block, a second sliding block, a first motor, and a sealing ring, the inside of the coating tank is movably installed with the storage rack, and the periphery of the storage rack is provided with the storage groove.

[0010] The ABS plastic part low-temperature metallization vacuum coating process and equipment, the inside of the coating tank is movably installed with the bearing disc at the bottom end, the upper end of the bearing disc is provided with the positioning groove, the bottom end positioning block of the storage rack is movably installed in the inside of the positioning groove, and the output end of the first motor is embedded in the bottom end of the bearing disc and is fixedly connected through bolts.

[0011] The ABS plastic part low-temperature metallization vacuum coating process and equipment, the lower end of the bearing disc is fixedly installed with the first sliding block, the bottom end of the coating tank is fixedly installed with the ring sliding groove, the first sliding block is movably embedded in the inside of the ring sliding groove, the upper end of the first gear is fixedly installed with the second sliding block, the second sliding block is movably embedded in the inside of the bottom end of the coating tank, and the output end of the first motor is fixedly installed with the sealing ring between the bottom end of the coating tank.

[0012] The ABS plastic part low-temperature metallization vacuum coating process and equipment, the inside of the coating tank is symmetrically installed with the liquid nitrogen cooling pipe, the liquid nitrogen cooling pipe is throughly connected with the liquid nitrogen tank, the liquid nitrogen cooling pipe is annular, and the top end of the coating tank is fixedly installed with a tank cover.

[0013] A vacuum coating process, the process comprising the following steps:

[0014] S1. Material preparation: Place the plastic parts into the storage slot of the shelf, close the can lid, start the first motor to drive the internal operating ring of the coating tank to move. The plasma cleaning port on the operating ring treats the surface of the plastic parts to remove surface oil and impurities.

[0015] S2. The vacuum pump performs a vacuum operation on the inside of the coating tank through the evacuation pipe, evacuating the chamber to below 1×10⁻² Pa. The gas tank introduces Ar / H2 mixed gas into the inside of the coating tank through the gas supply pipe to inhibit oxidation.

[0016] S3. The high-power pulsed magnetron sputtering device at the upper end of the operating ring performs a coating operation on the plastic parts to deposit a metal layer. At the same time, the liquid nitrogen cooling pipe controls the internal temperature, and the temperature inside the cavity is kept below ≤80°C.

[0017] S4. A layer of transparent oxide is added to improve scratch resistance and corrosion resistance;

[0018] S5. UV curing treatment enhances the density of the film layer.

[0019] This invention provides a low-temperature metallization vacuum coating process and equipment for ABS plastic parts, which has the following beneficial effects:

[0020] This invention utilizes a stable coating equipment. Plastic parts are placed inside a shelf within the vacuum coating equipment. During vacuum coating, a movable operating ring is installed inside the equipment. A motor at the bottom drives an output gear disc to rotate, which in turn drives surrounding threaded rods. These threaded rods are connected to the operating ring via threads. The rotation of the threaded rods causes the operating ring to move up and down. A plasma cleaning port at the top of the operating ring cleans the surface of the plastic parts, removing grease and impurities. A vacuum pump on the side evacuates the equipment. An internal temperature controller regulates the internal temperature; if the temperature is too high, a liquid nitrogen cooling system lowers it. A high-power pulsed magnetron sputtering device installed at the top of the operating ring coats the plastic parts, depositing a metal layer and simultaneously adding a transparent oxide layer to improve the scratch resistance and corrosion resistance of the plastic parts. Finally, ultraviolet light curing is applied. The entire operation of the equipment precisely controls the temperature to prevent the effects of high temperatures on the plastic parts. Furthermore, the use of high-power pulsed magnetron sputtering technology reduces environmental pollution and improves coating accuracy. Attached Figure Description

[0021] Figure 1 This is a 3D schematic diagram of the low-temperature metallization vacuum coating process and equipment for ABS plastic parts.

[0022] Figure 2 This is a cross-sectional structural diagram of the low-temperature metallization vacuum coating process and equipment for ABS plastic parts.

[0023] Figure 3 is a schematic diagram of a cross-sectional structure of a low-temperature metallization vacuum coating process and equipment for ABS plastic parts.

[0024] Figure 4 is a schematic diagram of a cross-sectional structure of a low-temperature metallization vacuum coating process and equipment for ABS plastic parts.

[0025] Figure 5 is a schematic diagram of a cross-sectional structure of a low-temperature metallization vacuum coating process and equipment for ABS plastic parts.

[0026] Figure 6 is a schematic diagram of a cross-sectional structure of a low-temperature metallization vacuum coating process and equipment for ABS plastic parts Figure 5 is an enlarged schematic diagram of a structure at A in the middle.

[0027] Figure 7 is a schematic diagram of a cross-sectional structure of a low-temperature metallization vacuum coating process and equipment for ABS plastic parts Figure 5 is an enlarged schematic diagram of a structure at B in the middle.

[0028] Explanation of reference signs:

[0029] 1, body; 2, coating tank; 201, storage rack; 202, storage groove; 203, operating ring; 204, first gear; 205, second gear; 206, threaded rod; 207, bearing disc; 208, positioning groove; 209, pulse head; 210, plasma cleaning port; 211, ring sliding groove; 212, first sliding block; 213, second sliding block; 214, first motor; 215, sealing ring; 3, evacuation pipe; 4, control valve; 5, connecting ring; 6, gas delivery pipe; 7, side plate; 701, sliding rod; 702, sliding plate; 703, second motor; 704, bearing plate; 705, connecting chain; 706, hydraulic rod; 8, tank cover; 9, vacuum pump; 10, liquid nitrogen tank; 11, gas tank; 12, liquid nitrogen cooling pipe. DETAILED DESCRIPTION

[0030] The subject matter described herein will now be discussed with reference to example implementations. It should be understood that discussions of these implementations are merely provided for the purposes of enabling better understanding of the subject matter and can be changed in the functional and arrange- ments of the elements without departing from the scope of the present description. Various processes or components can be omitted, substituted, or added according to desired implementations. Additionally, features described with respect to some examples can be combined in other examples.

[0031] See Figures 1-7The application provides a scheme: ABS plastic part low-temperature metallization vacuum coating equipment, which comprises a body 1, a coating tank 2 is embedded and mounted in the body 1, plastic parts are put into the coating tank for coating operation, a side plate 7 is fixedly installed at the upper end of the body 1, a hoisting device is installed on the side of the side plate 7, the storage rack 201 can be hoisted and carried during operation, the storage rack 201 is movably installed in the coating tank 2, plastic parts can be placed on the storage rack 201 for later coating operation, an operation ring 203 is movably installed in the coating tank 2, a threaded rod 206 is movably connected to the side of the operation ring 203 in a threaded mode, the threaded rod 206 rotates under the driving of a first motor 214, the first motor 214 can rotate in forward and reverse directions, so that the operation ring 203 moves up and down, the plasma cleaning port 210 and the pulse head 209 on the upper end of the operation ring 203 uniformly treat the surface of the plastic parts, the second gear 205 is installed at the bottom of the threaded rod 206 in a sleeved mode, the first motor 214 is fixedly installed in the body 1, the first gear 204 is installed at the output end of the first motor 214 in a sleeved mode, the first gear 204 is engaged with the second gear 205, so that power is output and linked when the first motor 214 rotates, the second gear 205 at the four corners rotates when the first gear 204 rotates, the pulse head 209 and the plasma cleaning port 210 are fixedly installed at the upper end of the operation ring 203, impurities and oil on the surface of the plastic parts are removed, the coating forming effect of the plastic parts is improved, the pulse head 209 deposits a metal layer, high-power pulse technology is adopted, the influence on the external environment is reduced, the liquid nitrogen cooling pipe 12 is fixedly installed at the inner side of the coating tank 2, the liquid nitrogen tank 10 is connected with the liquid nitrogen cooling pipe 12, liquid nitrogen is transported into the liquid nitrogen cooling pipe 12 through the vacuum heat insulation pipeline during coating, the liquid nitrogen cooling pipe 12 is an annular pipeline, liquid nitrogen can be circulated and cooled, and the temperature inside the coating tank 2 can be controlled.

[0032] In this embodiment, the inside of the body 1 is fixedly installed with a vacuum pump 9, the inside of the body 1 is fixedly installed with a liquid nitrogen tank 10 and a gas tank 11, the inside of the gas tank 11 stores mixed gas, which can transport gas into the tank body to inhibit the oxidation of the plastic part during coating, the output end of the gas tank 11 is connected with the gas conveying pipe 6, the upper end of the gas conveying pipe 6 is installed with a control valve for accurately controlling the flow of the input gas, the upper end of the body 1 is fixedly installed with an evacuation pipe 3, one end of the evacuation pipe 3 is connected with the coating tank 2, the evacuation pipe 3 is used to evacuate the coating tank 2 under the action of the vacuum pump 9 to form a vacuum in the tank, a control valve 4 is fixedly installed between one end of the evacuation pipe 3 and the vacuum pump 9 to adjust the plastic speed during evacuation to prevent deformation of the tank caused by rapid extraction, the other end of the evacuation pipe 3 is movably installed with a connecting ring 5, one end of the gas conveying pipe 6 is also installed with a connecting ring 5, which is convenient for dismounting after coating, the output end of the liquid nitrogen tank 10 is connected with the coating tank 2, the upper end of the gas tank 11 is fixedly installed with the gas conveying pipe 6, one end of the gas conveying pipe 6 is connected with the coating tank 2, which is convenient for gas conveying during coating, the side plate 7 includes a sliding rod 701, a sliding plate 702, a second motor 703, a bearing plate 704, a connecting chain 705 and a hydraulic rod 706, the sliding rod 701 is symmetrically installed on the side of the side plate 7, the sliding plate 702 is movably installed outside the sliding rod 701, the sliding plate 702 is sleeved outside the sliding rod 701, the output end of the second motor 703 is movably connected with the top end of the hydraulic rod 706, the bearing plate 704 is fixedly installed outside the output end of the second motor 703, the connecting chain 705 is fixedly installed on one end of the bearing plate 704, after coating, the evacuation pipe 3 and the gas conveying pipe 6 are dismounted, the connecting chain 705 is connected with the tank cover 8, the hydraulic rod 706 drives the second motor 703 to rise, when the second motor 703 rises, the sliding plate 702 slides outside the sliding rod 701 to increase the stability of the second motor 703 during rising, when the inner shelf 201 is completely lifted from the tank body, the second motor 703 drives the bearing plate 704 to rotate, the output end of the second motor 703 is movably embedded in the inside of the hydraulic rod 706, the two are movably installed through a bearing, the output end of the second motor 703 is fixedly connected with the inside ring of the bearing, the hydraulic rod 706 is fixedly connected with the outside ring of the bearing, which can make the second motor 703 rotate, the second motor 703 offsets the shelf 201 and places it on the unloading table, and the plastic part after coating is taken down.

[0033] In this embodiment, the coating tank 2 comprises a shelf 201, a storage groove 202, an operating ring 203, a first gear 204, a second gear 205, a threaded rod 206, a bearing disc 207, a positioning groove 208, a pulse head 209, a plasma cleaning port 210, a ring sliding groove 211, a first sliding block 212, a second sliding block 213, a first motor 214, a sealing ring 215, the inside of the coating tank 2 movably installs the shelf 201, the periphery of the shelf 201 is provided with the storage groove 202, the plastic part is placed in the inside of the storage groove 202, the inside bottom of the coating tank 2 movably installs the bearing disc 207, the upper end of the bearing disc 207 is provided with the positioning groove 208, the bottom positioning block of the shelf 201 is movably installed in the inside of the positioning groove 208, when the bearing disc 207 is slowly rotated by the first motor 214, the bearing disc 207 is stably rotated, the stability of the coating operation is increased, the output end of the first motor 214 is embedded in the bottom of the bearing disc 207 and is fixedly connected through bolts, the first motor 214 outputs power, drives the bearing disc 207 to rotate, thereby drives the shelf 201 to rotate, so that the plasma cleaning port 210 and the pulse head 209 uniformly process the plastic part, and the forming effect of the plastic part is increased.

[0034] In this embodiment, the lower end of the bearing disc 207 is fixedly installed with the first sliding block 212, the bottom of the coating tank 2 is fixedly installed with the ring sliding groove 211, the first sliding block 212 is movably embedded in the inside of the ring sliding groove 211, the stability of the bearing disc 207 in rotation is increased, the upper end of the first gear 204 is fixedly installed with the second sliding block 213, the second sliding block 213 is movably embedded in the inside of the bottom of the coating tank 2, the stability of the bottom first gear 204 in rotation is increased, the sealing ring 215 is fixedly installed between the output end of the first motor 214 and the bottom of the coating tank 2, the sealing effect in vacuum is increased, the inside of the coating tank 2 is symmetrically installed with the liquid nitrogen cooling pipe 12, the liquid nitrogen cooling pipe 12 is throughly connected with the liquid nitrogen tank 10, the liquid nitrogen cooling pipe 12 is annular, can real-time regulate and control the inside temperature under the control of the inside temperature detector, increases the coating effect, the top of the coating tank 2 is fixedly installed with the tank cover 8, the inside of the tank cover 8 is installed with the ultraviolet lamp disc, the inside plastic part is solidified.

[0035] Vacuum coating process, the process steps are as follows:

[0036] S1, material preparation: the plastic part is placed in the storage groove 202 of the shelf 201, the tank cover 8 is closed, the first motor 214 is started to drive the operating ring 203 in the inside of the coating tank 2 to move, the plasma cleaning port 210 on the operating ring 203 processes the surface of the plastic part, removes the oil stains and impurities on the surface, the plasma cleaning adopts Ar / O2 mixed gas, the power is 50-100W;

[0037] S2, the vacuum pump 9 carries out the vacuumizing operation to the inside of the coating tank 2 through the exhaust pipe 3, the chamber is extracted to below 1*10-2Pa, the gas tank 11 inputs Ar / H2 mixed gas to the inside of the coating tank 2 through the gas pipe 6, and oxidation is inhibited;

[0038] S3, the high-power pulsed magnetron sputtering device at the upper end of the operation ring 203 carries out the coating operation to the plastic part, a metal layer is deposited, the liquid nitrogen cooling pipe 12 controls the temperature inside, the temperature in the cavity is below 80 DEG C, the pulse frequency is 500-1000 Hz, the peak power is 500-800 W, the deposition rate is 5-10 nm / s, and the total film thickness is 100-300 nm

[0039] S4, a layer of transparent oxide is superimposed, and the scratch resistance and corrosion resistance are improved;

[0040] S5, ultraviolet light curing treatment is carried out, and the film layer density is enhanced.

[0041] The working process and principle of the application are as follows:

[0042] First, the plastic parts are placed inside the storage groove 202, the connecting chain 705 is fixedly connected with the tank cover 8, the hydraulic rod 706 drives the second motor 703 to rise as a whole, so that the storage rack 201 rises to a height higher than that of the coated tank 2, then the second motor 703 drives the bearing plate 704 to rotate, and drives the storage rack 201 to rotate, so that the storage rack 201 is suspended above the coated tank 2, then the hydraulic rod 706 is lowered, and the storage rack 201 is placed inside the coated tank 2, then the evacuated tank 3 and the gas conveying pipe 6 are connected with the connecting pipe on the tank cover 8, the first motor 214 is started, the first gear 204 at the output end is driven to rotate, the first gear 204 drives the second gear 205 to rotate, the upper end of the first gear 204 is provided with the second sliding block 213, the second sliding block 213 is embedded in the bottom end of the coated tank 2, so that the stability of the first gear 204 during rotation is improved, the linkage effect is improved, and the transmission is better, so that the threaded rod 206 in the second gear 205 is driven to rotate, the threaded rod 206 drives the operation ring 203 outside to rise or fall when rotating, the plasma cleaning port 210 and the pulse head 209 are installed at the upper end of the operation ring 203, the surface of the plastic part is rotated, the top end of the output end of the first motor 214 is fixedly connected with the bearing disc 207 inside the coated tank 2, the lower end of the bearing disc 207 slides in the ring sliding groove 211 during coating, so that the stability of the bearing plate 207 during rotation is improved, the storage rack 201 is driven to rotate, and the operation ring 203 moves up and down, so that the plasma cleaning port 210 and the pulse head 209 uniformly process the surface of the plastic part, during the coating process, the liquid nitrogen cooling pipe 12 is connected with the liquid nitrogen tank 10, the temperature inside is controlled, so that the inside is at low temperature, the effect of coating is improved, the inside of the tank cover 8 is provided with an ultraviolet lamp disc, after the coating of the plastic part is completed, the lamp disc solidifies the plastic part, after the coating is completed, the hydraulic rod 706 drives the connecting chain 705 to rise, the storage rack 201 is lifted as a whole, so that the height of the storage rack 201 is higher than that of the coated tank 2, then the second motor 703 rotates, so that the storage rack 201 is away from the coated tank 201, the plastic part is taken down, and then the mechanical polishing operation is performed, so that the coating effect of the surface of the plastic part is better.

[0043] Finally, it should be noted that: the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A low-temperature metallization vacuum coating equipment for ABS plastic parts, comprising a machine body (1), characterized in that: The coating tank (2) is embedded inside the body (1). A side plate (7) is fixedly installed on the upper end of the body (1). A shelf (201) is movably installed inside the coating tank (2). An operating ring (203) is movably installed inside the coating tank (2). A threaded rod (206) is movably connected to the side of the operating ring (203) by a thread. A second gear (205) is sleeved on the bottom end of the threaded rod (206). A first motor (214) is fixedly installed inside the body (1). A first gear (204) is sleeved on the output end of the first motor (214). The first gear (204) meshes with the second gear (205). A pulse head (209) and a plasma cleaning port (210) are fixedly installed on the upper end of the operating ring (203). A liquid nitrogen cooling pipe (12) is fixedly installed on the inner side of the coating tank (2).

2. The low-temperature metallization vacuum coating equipment for ABS plastic parts according to claim 1, characterized in that: A vacuum pump (9) is fixedly installed inside the body (1). A liquid nitrogen tank (10) and a gas tank (11) are fixedly installed inside the body (1). An evacuation pipe (3) is fixedly installed at the upper end of the body (1). One end of the evacuation pipe (3) is connected to the coating tank (2).

3. The low-temperature metallization vacuum coating equipment for ABS plastic parts according to claim 2, characterized in that: A control valve (4) is fixedly installed between one end of the evacuation pipe (3) and the vacuum pump (9), and a connecting ring (5) is movably installed at the other end of the evacuation pipe (3). The output end of the liquid nitrogen tank (10) is connected to the coating tank (2). A gas supply pipe (6) is fixedly installed at the upper end of the gas tank (11), and one end of the gas supply pipe (6) is connected to the coating tank (2).

4. The low-temperature metallization vacuum coating equipment for ABS plastic parts according to claim 1, characterized in that: The side plate (7) includes a slide rod (701), a slide plate (702), a second motor (703), a support plate (704), a connecting chain (705), and a hydraulic rod (706). The slide rod (701) is symmetrically installed on the side of the side plate (7). The slide plate (702) is movably installed outside the slide rod (701). The output end of the second motor (703) is movably connected to the top end of the hydraulic rod (706). The support plate (704) is fixedly installed outside the output end of the second motor (703). The connecting chain (705) is fixedly installed at one end of the support plate (704).

5. The low-temperature metallization vacuum coating equipment for ABS plastic parts according to claim 1, characterized in that: The coating tank (2) includes a shelf (201), a storage slot (202), an operating ring (203), a first gear (204), a second gear (205), a threaded rod (206), a bearing plate (207), a positioning slot (208), a pulse head (209), a plasma cleaning port (210), a ring groove (211), a first slider (212), a second slider (213), a first motor (214), and a sealing ring (215). The shelf (201) is movably installed inside the coating tank (2), and the storage slot (202) is opened around the shelf (201).

6. The low-temperature metallization vacuum coating equipment for ABS plastic parts according to claim 5, characterized in that: The coating tank (2) has a support plate (207) movably installed at the bottom of its interior. The support plate (207) has a positioning groove (208) at its upper end. The bottom positioning block of the shelf (201) is movably installed inside the positioning groove (208). The output end of the first motor (214) is embedded in the bottom of the support plate (207) and fixedly connected by bolts.

7. The low-temperature metallization vacuum coating equipment for ABS plastic parts according to claim 5, characterized in that: The lower end of the bearing plate (207) is fixedly installed with a first slider (212), the bottom end of the coating tank (2) is fixedly installed with an annular groove (211), the first slider (212) is movably embedded in the annular groove (211), the upper end of the first gear (204) is fixedly installed with a second slider (213), the second slider (213) is movably embedded in the bottom end of the coating tank (2), and a sealing ring (215) is fixedly installed between the output end of the first motor (214) and the bottom end of the coating tank (2).

8. The low-temperature metallization vacuum coating equipment for ABS plastic parts according to claim 2, characterized in that: The coating tank (2) is symmetrically equipped with liquid nitrogen cooling pipes (12), which are connected to the liquid nitrogen tank (10). The liquid nitrogen cooling pipes (12) are ring-shaped, and the top of the coating tank (2) is fixedly installed with a tank cover (8).

9. A vacuum coating process, implemented using the vacuum coating equipment as described in any one of claims 1-8, characterized in that: S1. Material preparation: Place the plastic parts into the storage slot (202) of the shelf (201), close the can lid (8), start the first motor (214) to drive the operation ring (203) inside the coating tank (2) to move. The plasma cleaning port (210) on the operation ring (203) treats the surface of the plastic parts to remove oil and impurities. S2. The vacuum pump (9) performs a vacuum operation on the inside of the coating tank (2) through the evacuation pipe (3) to evacuate the chamber to below 1×10⁻²Pa. The gas tank (11) introduces Ar / H2 mixed gas into the inside of the coating tank (2) through the gas supply pipe (6) to suppress oxidation. S3, The high-power pulsed magnetron sputtering device at the upper end of the operating ring (203) performs a coating operation on the plastic parts to deposit a metal layer, while the liquid nitrogen cooling pipe (12) controls the internal temperature, and the temperature inside the cavity is below ≤80°C. S4. A layer of transparent oxide is added to improve scratch resistance and corrosion resistance; S5. Ultraviolet curing treatment enhances the density of the film layer.

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