Building block assembly type object surface treatment assembly line

Abstract

The invention discloses a building block assembly type article surface treatment assembly line which comprises a conveying line and a plurality of operation units arranged on the side face of the conveying line, and according to different production processes, the operation units with different sequences and numbers are arranged on one side or two sides of the conveying line. According to the building block assembly type article surface treatment assembly line, the operation units can be arranged in different sequences or numbers on the conveying line according to different products and different technologies, the assembly line can be flexibly adjusted according to needs, the occupied area is reduced, and market demand changes can be rapidly coped with.

Description

Technical Field

[0001] The present invention relates to the technical field of surface treatment, and more particularly to a surface treatment production line for building block-assembled items. Background Art

[0002] Currently, there is a great demand for containers, bottles, closure elements, knobs, electronic and electrical parts or other items with a high finish, for example in the food, pharmaceutical, cosmetic, brewing, electronics, machinery and other industries / fields.

[0003] Depending on the type of surface treatment required, an item may require different types of surface treatment. For example, painting processes typically require that each item (e.g., plastic material) be cleaned, activated, primed, painted, and then coated with a clear protective coat before processing. These layers are applied sequentially, with each layer drying and curing (e.g., with infrared and / or ultraviolet radiation) before the next layer is applied.

[0004] Traditional coating equipment currently in use utilizes a single, uninterrupted chain drive throughout the entire production line. The workpiece and spindle are inserted into the chain's connecting holes, and the chain propels the workpiece forward at a constant speed, sequentially passing through each workstation. This system has several drawbacks: Because the chain has a fixed pitch, the spacing between workpieces cannot be adjusted, often resulting in large spacing and resulting in bulky production lines and a large footprint. Furthermore, the fixed and difficult-to-adjust layout of the production line makes it difficult to adapt to different product types or process changes for the same product, and it is unable to respond to fluctuating market demands, particularly for high-variety, low-volume orders.

[0005] Therefore, it is necessary to propose a surface treatment production line for building block assembled items to solve the problems existing in the prior art. Summary of the Invention

[0006] The Summary of the Invention introduces a series of simplified concepts that will be further described in the Detailed Description of the Invention. The Summary of the Invention is not intended to limit the key features and essential features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0007] In order to solve the above problems, the present invention provides a surface treatment production line for building block-assembled items, including a conveyor line and several work units arranged on the side of the conveyor line. Depending on different production processes, the work units are arranged in different orders and quantities on one side or both sides of the conveyor line.

[0008] Preferably, the conveying line is connected in sequence by a plurality of conveying modules, and the number of the conveying modules corresponds to the number of the working units.

[0009] Preferably, the operation unit includes a pre-treatment unit, a primary coating unit, a primer unit, a metallization unit and a top coating unit;

[0010] The pre-treatment unit is used to clean dust and oil stains on the workpiece surface, clean the cloak wire drawing, and enhance the surface activity;

[0011] The primary coating unit is used to modify the surface of the workpiece;

[0012] The primer unit is used to spray primer on the workpiece;

[0013] The metallization unit is used to coat a metal film on the surface of the workpiece;

[0014] The top coating unit is used to spray protective paint on the surface of workpieces coated with metal film.

[0015] Preferably, the operation unit further includes a detection unit, a defective product processing unit and a finished product marking processing unit;

[0016] The detection unit is arranged at the rear side of the top coating unit and is used to detect the spraying quality of the workpiece after the protective paint is sprayed;

[0017] Defective product processing unit, recycling and inspection unit detects unqualified workpieces;

[0018] The finished product identification processing unit prints or inkjet codes on the workpieces that have passed the inspection of the inspection unit.

[0019] Preferably, the conveyor line and each operating unit are provided with a programmable controller, and the programmable controller is used to control the operating state and processing parameters of the corresponding operating unit;

[0020] The operating status includes the start status, stop status or automatic bypass status.

[0021] Preferably, a lifting and transferring mechanism is provided on a side of each operating unit close to the conveyor line, and the lifting and transferring mechanism is used to transfer the workpiece between the conveyor line and the operating unit.

[0022] Preferably, the lifting and transferring mechanism includes a gantry and a rotating power assembly arranged on the gantry, a connecting frame is arranged on the power output shaft of the rotating power assembly, a lifting frame is slidingly arranged at the lower part of the connecting frame, and two groups of clamping assemblies are symmetrically arranged at the bottom of the lifting frame, and the clamping assemblies are used to clamp or release the workpiece.

[0023] Preferably, a lifting power assembly is fixedly arranged on the bottom plate of the connecting frame, and a piston rod of the lifting power assembly passes through the bottom plate of the connecting frame, extends to the lower part of the connecting frame, and is connected to the lifting frame.

[0024] Preferably, the clamping assembly includes a first clamping jaw and a second clamping jaw slidably arranged on the slide rail, and the first clamping jaw is arranged opposite to the second clamping jaw.

[0025] Preferably, a conveying carriage is slidably provided on the conveying line, and an operating carriage is slidably provided in the operating unit. Both the conveying carriage and the operating carriage can be detachably provided with clamping shafts for mounting workpieces. When the lifting and transferring mechanism transfers the workpiece, the two sets of clamping assemblies clamp the clamping shafts of the conveying carriage and the operating carriage respectively, and transfer the clamping shafts between the conveying carriage and the operating carriage.

[0026] Compared with the prior art, the present invention has at least the following beneficial effects:

[0027] The surface treatment assembly line for building block-assembled items described in the present invention can arrange the operating units in different orders or quantities on the conveyor line according to different products and different processes. The assembly line can be flexibly adjusted as needed to reduce the floor space and can quickly respond to changes in market demand.

[0028] The surface treatment line for building block-type items described in the present invention, and other advantages, objectives and features of the present invention will be partially reflected in the following description, and will also be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0030] Figure 1 This is a schematic structural diagram of the surface treatment line for building block-assembled items disclosed in the present invention;

[0031] Figure 2 This is a schematic diagram of the structure of a surface treatment production line for building block-assembled items with different arrangement methods disclosed in the present invention;

[0032] Figure 3 It is a structural schematic diagram of the lifting and transferring mechanism, the conveying line and the operating unit positions disclosed in the present invention;

[0033] Figure 4 It is a structural schematic diagram of the lifting and transferring mechanism disclosed in the present invention;

[0034] Figure 5 This is a structural schematic diagram of another angle lifting and transferring mechanism disclosed in the present invention;

[0035] Figure 6 This is a schematic structural diagram of the lifting power assembly disclosed in the present invention;

[0036] Figure 7 This is a schematic structural diagram of the work carriage disclosed in the present invention;

[0037] Figure 8This is a schematic structural diagram of the conveying carriage disclosed in the present invention.

[0038] Among them: 1. Conveyor line, 2. Pretreatment unit, 3. Primary coating unit, 4. Primer unit, 5. Metallization unit, 6. Topcoat unit, 7. Gantry, 8. Rotating power assembly, 9. Connecting frame, 91. Bottom plate, 10. Lifting power assembly, 101. Piston rod, 11. Lifting frame, 12. First clamping jaw, 13. Second clamping jaw, 14. Slide rail, 15. Conveying carriage, 16. Working carriage, 17. Clamping shaft. DETAILED DESCRIPTION

[0039] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

[0040] It should be understood that terms such as “having”, “including” and “comprising” used herein do not preclude the existence or addition of one or more other elements or combinations thereof.

[0041] like Figures 1-8 As shown, the present invention provides a surface treatment production line for building block-assembled items, including a conveyor line 1 and a plurality of operating units arranged on the side of the conveyor line 1. Depending on different production processes, the operating units are arranged in different orders and quantities on one side or both sides of the conveyor line 1.

[0042] Furthermore, the conveying line 1 is connected in sequence by a plurality of conveying modules, and the number of the conveying modules corresponds to the number of the operating units.

[0043] Furthermore, the operation unit includes a pre-treatment unit 2, a primary coating unit 3, a primer unit 4, a metallization unit 5 and a top coating unit 6;

[0044] The pretreatment unit 2 is used to clean dust and oil stains on the workpiece surface, clean the cloak wire drawing, and enhance the surface activity;

[0045] The primary coating unit 3 is used to modify the surface of the workpiece;

[0046] The primer unit 4 is used to spray primer on the workpiece;

[0047] The metallization unit 5 is used to plate a metal film on the surface of the workpiece;

[0048] The top coating unit 6 is used to spray protective paint on the surface of the workpiece coated with the metal film.

[0049] Furthermore, the operation unit also includes a detection unit, a defective product processing unit and a finished product marking processing unit;

[0050] The detection unit is arranged at the rear side of the top coating unit 6 and is used to detect the spraying quality of the workpiece after the protective paint is sprayed;

[0051] Defective product processing unit, recycling and inspection unit detects unqualified workpieces;

[0052] The finished product identification processing unit prints or inkjet codes on the workpieces that have passed the inspection of the inspection unit.

[0053] Furthermore, the conveyor line 1 and each operating unit are provided with a programmable controller, which is used to control the operating status and processing parameters of the corresponding operating unit;

[0054] The operating status includes the start status, stop status or automatic bypass status.

[0055] Furthermore, a lifting and transferring mechanism is provided on a side of each operation unit close to the conveyor line 1 , and the lifting and transferring mechanism is used to transfer the workpiece between the conveyor line 1 and the operation unit.

[0056] Furthermore, the lifting and transferring mechanism includes a gantry 7 and a rotating power assembly 8 arranged on the gantry 7, a connecting frame 9 is arranged on the power output shaft of the rotating power assembly 8, a lifting frame 11 is slidingly arranged at the lower part of the connecting frame 9, and two groups of clamping assemblies are symmetrically arranged at the bottom of the lifting frame 11, and the clamping assemblies are used to clamp or release the workpiece.

[0057] Furthermore, a lifting power assembly 10 is fixedly mounted on the bottom plate 91 of the connecting frame 9 . A piston rod 101 of the lifting power assembly 10 penetrates the bottom plate 91 of the connecting frame 9 , extends to the lower portion of the connecting frame 9 , and is connected to the lifting frame 11 .

[0058] Furthermore, the clamping assembly includes a first clamping jaw 12 and a second clamping jaw 13 slidably disposed on a slide rail 14 , and the first clamping jaw 12 and the second clamping jaw 13 are disposed opposite to each other.

[0059] Furthermore, a conveying carriage 15 is slidingly provided on the conveyor line 1, and an operating carriage 16 is slidingly provided in the operating unit. A clamping shaft 17 for mounting the workpiece can be detachably provided on both the conveying carriage 15 and the operating carriage 16. When the lifting and transferring mechanism transfers the workpiece, the two groups of clamping components clamp the clamping shafts 17 of the conveying carriage 15 and the operating carriage 16 respectively, and transfer the clamping shafts 17 between the conveying carriage 15 and the operating carriage 16.

[0060] The working principle of the above technical solution is:

[0061] The surface treatment production line of building block-assembled items includes a conveyor line 1 and several working units arranged on the side of the conveyor line 1. According to different production processes, the working units are arranged in different orders and quantities on one side or both sides of the conveyor line 1.

[0062] The conveyor line 1 is connected in sequence by a plurality of conveyor modules, and the number of the conveyor modules corresponds to the number of the working units.

[0063] The operation unit includes a pre-treatment unit 2, a primary coating unit 3, a primer unit 4, a metallization unit 5 and a top coating unit 6;

[0064] The pre-treatment unit 2 is used to clean dust and oil stains (such as fingerprints) on the workpiece surface, clean the cloak brushing, enhance the surface activity, and enhance the affinity with the coating;

[0065] The primary coating unit 3 is used to modify the surface of the workpiece. It is targeted at certain specific materials. For example, if the affinity of PP with the paint is still insufficient after the pre-treatment unit treatment, its surface needs to be modified (similar to roughening, increasing the surface area and improving the affinity with the paint).

[0066] The primer unit 4 is used to spray primer on the workpiece. The surface finish of the injection molded part is not very high. If the direct coating is not fine and the gloss is not high, a layer of primer needs to be applied to cover the defects of the workpiece and improve the surface finish. This primer application and drying process is completed by the primer unit.

[0067] The metallization unit 5 is used to plate a metal film on the surface of the workpiece, which can be gold, silver, copper, nickel, chromium or aluminum;

[0068] The top coating unit 6 is used to spray protective paint on the surface of the workpiece coated with a metal film. Since the metal coating is very thin, it is easy to oxidize, or be scratched or abraded, so it is necessary to apply another layer of protective paint on its surface, which can also change the color or matte effect.

[0069] According to the different materials and requirements of the workpiece, different work units are arranged, for example:

[0070] For PP workpieces, all processes are required, and the arrangement of the production line is: pretreatment unit - primary coating unit - primer unit - metallization unit - and top coating unit;

[0071] For ABS workpieces, since ABS workpieces have good affinity with primers, no surface modification treatment is required. Therefore, the arrangement of the production line is: pretreatment unit - primer unit - metallization unit - and topcoat unit;

[0072] For metal workpieces with good surface finish, the surface does not need to be modified or sprayed with primer. The arrangement of the production line is: pretreatment unit - metallization unit - and topcoat unit;

[0073] For workpieces that do not require metallic luster, the assembly line is arranged as follows: pretreatment unit - initial coating unit - primer unit - and top coating unit.

[0074] like Figure 1As shown, it is an arrangement of the working units of a building block assembly type surface treatment production line. The pretreatment unit 2, the initial coating unit 3, the primer unit 4, the metallizing unit 5 and the top coating unit 6 are arranged in sequence. The working units are arranged in sequence. The conveyor line passes through the metallizing unit 5. The conveyor carriage actually enters the metallizing unit 5 for circulation. Since the metallizing unit operates under vacuum, the dust generated by the coating operation and the environment will cause pollution to the metallizing unit, requiring frequent cleaning and maintenance.

[0075] like Figure 2 Shown is another arrangement of operating units for a surface treatment production line for building block-type items. The conveyor line structure uses a main and auxiliary conveyor lines. The auxiliary conveyor line is dedicated to the metallizing unit. Its line body is relatively short, carrying a small number of conveyor carriages that circulate only within the metallizing unit. A lifting and transferring mechanism is used to transfer the clamping shaft and workpiece between the main and auxiliary conveyor lines. This further isolates the metallizing unit, reduces contamination, and extends the frequency of cleaning and maintenance.

[0076] Conveyor line 1 is a bidirectional, double-speed chain with a U-turn mechanism at both ends. It can be turned in two ways: 1. 180-degree U-turn, 2. Horizontal movement and backward movement. The conveyor carriage circulates back and forth on the conveyor line. Loading and unloading areas are located on the left and right ends of conveyor line 1.

[0077] The number of working units of the surface treatment assembly line for building block-type items can also be set to different numbers. For example, for workpieces with poor surface affinity and difficult surfaces, two primary coating units 3 can be set side by side on the side of the conveyor line 1, and the workpieces that have passed the pretreatment unit 2 can be transferred to the two primary coating units 3 respectively for treatment. This can avoid the subsequent processes requiring a long waiting time due to the long processing time of the primary coating unit 3. The surface treatment assembly line for building block-type items can not only adapt to the production of different products, but also coordinate the work of each working unit of the entire production line to prevent time waste caused by different working times of each working unit.

[0078] The operation unit also includes a detection unit, a defective product processing unit and a finished product marking processing unit;

[0079] The detection unit is arranged on the rear side of the top coating unit 6, and the detection unit is used to detect the spraying quality of the workpiece after the protective paint is sprayed; the detection unit can use visual detection to detect the smoothness of the surface-treated workpiece. After passing the inspection, the workpiece enters the finished product identification processing unit to print the surface of the product, such as a trademark, etc., and can also perform engraving and hot stamping of a specific shape on the surface of the product to form a unique mark of the product itself, and then spray a barcode on the surface of the product.

[0080] The defective product processing unit recycles the unqualified workpieces detected by the inspection unit. When the surface finish of the workpiece detected by the inspection unit is unqualified, the workpiece is transferred to the defective product processing unit for recycling and processing;

[0081] The conveyor line and each operating unit are equipped with a programmable controller, which is used to control the operating status and processing parameters of the corresponding operating unit; the operating status includes the start state, stop state or automatic bypass state.

[0082] The automatic bypass state means that for a certain workpiece, when it does not need to pass through a certain work unit for operation processing, the state of this work unit is set to skip, so that when the entire assembly line processes this workpiece, the workpiece automatically passes through this work unit and does not stop and goes directly to the next work unit, making this work unit outside the assembly line.

[0083] The programmable controller adjusts the process parameters of each operating unit or conveyor line 1 individually.

[0084] A lifting and transferring mechanism is provided on a side of each operation unit close to the conveyor line 1 , and the lifting and transferring mechanism is used to transfer the workpiece between the conveyor line 1 and the operation unit.

[0085] The lifting and transferring mechanism includes a gantry 7 and a rotating power assembly 8 arranged on the gantry 7. A connecting frame 9 is set on the power output shaft of the rotating power assembly 8. A lifting frame 11 is slidingly set at the lower part of the connecting frame 9. Two groups of clamping assemblies are symmetrically set at the bottom of the lifting frame 11. The clamping assembly is used to clamp or release the workpiece. The clamping assembly includes a first clamping jaw 12 and a second clamping jaw 13 slidably set on a slide rail 14.

[0086] The two groups of clamping assemblies are symmetrically arranged with the center of the lifting frame 11 as the symmetry center. The center of the lifting frame 11 is coaxial with the center of the connecting frame 9 and the axis of the rotating power assembly 8. Before the workpiece is transferred, the first clamping jaw 12 and the second clamping jaw 13 are separated. When the conveying carriage 15 on the conveyor line 1 and the working pallet 26 on the working unit are moved to the lower part of the lifting and transferring mechanism, the piston rod 101 of the lifting power assembly 10 is extended to move the first clamping jaw 12 and the second clamping jaw 13 downward to the position below the clamping shaft 17. At this time, the first clamping jaw 12 and the second clamping jaw 13 move relative to each other to clamp the clamping shaft 17, and then the piston rod 101 of the lifting power assembly 10 is retracted. The first clamping jaw 12 and the second clamping jaw 13 move in opposite directions to release the clamping shaft 17, thereby completing the transfer between the workpiece on the conveyor line 1 and the work unit.

[0087] The shape of the portion of the first clamping jaw 12 and the second clamping jaw 13 relative to each other at the lower portion for clamping the clamping shaft 17 is adapted to the outer shape of the clamping shaft 17, and multiple clamping shafts 17 can be respectively provided on the work carriage 16 and the transport carriage 15, so that multiple workpieces can be transported at the same time. Multiple clamping positions adapted to the shape of the clamping shaft 17 are provided at the lower portion of the first clamping jaw 12 and the second clamping jaw 13, and the distance between the clamping positions is the same as the distance between the clamping shafts 17.

[0088] The clamping shaft 17 can be set as a hollow structure, and multiple connecting shafts are set on the upper part of the working carriage 16 and the conveying carriage 15. The clamping shaft 17 can be sleeved on the connecting shaft, and an iron or steel sleeve can be set at the bottom of the clamping shaft 17. At least one magnet is set around the connecting shaft on the upper end surface of the working carriage 16 and the conveying carriage 15. When the clamping shaft 17 is sleeved on the connecting shaft, the magnetic attraction enables the clamping shaft 17 to be stably sleeved on the connecting shaft, preventing the clamping shaft 17 from falling off when the working carriage 16 and the conveying carriage 15 move. When the clamping shaft 17 is transferred, the clamping assembly clamps the clamping shaft 17 and pulls it upward to overcome the suction force of the magnet and remove the clamping shaft 17 from the connecting shaft.

[0089] The difference between the working carriage 16 and the conveying carriage 15 is that, since the working carriage 16 operates in the working unit, the working unit needs to rotate the workpiece to improve the uniformity of the spraying when spraying the workpiece, so the connecting shaft of the working carriage is rotatably set on the working carriage 16, and the conveying carriage 15 is only used to transport the workpiece, and the connecting shaft on the conveying carriage 15 can be fixedly set on the conveying carriage.

[0090] The rotary power assembly 8, the lifting power assembly 10 and the telescopic cylinder can be hydraulic, pneumatic or electric devices.

[0091] The present invention provides a building block-assembled article surface treatment production line, which overcomes the limitations of traditional equipment through the combination of conveyor lines and operating units, improves the versatility of article painting or other surface treatment processes, and simplifies the settings to achieve the best process effect.

[0092] This invention provides a building block-type surface treatment production line with wide applicability, compact structure, and space-saving design. Its fully streamlined operation reduces labor costs and addresses the challenges faced by traditional surface treatment plants, including high labor costs, waste of raw materials, and difficulty in fulfilling high-variety, low-volume orders.

[0093] It should be noted that the surface treatment assembly line for building block-assembled items involved in the present invention can be applied to the surface treatment of three-dimensional objects, such as lipstick tubes, bottle caps, knobs, buttons, parts, etc. The workpiece is mounted on the clamping shaft 17, and workpieces of different lengths can be mounted on the clamping shaft 17. The upper end of the clamping shaft 17 can be set to a cross-opening shape. The clamping shaft 17 can be made of engineering plastics, such as POM (polyoxymethylene). The clamping shaft 17 has a certain elasticity. The workpiece is mounted on the clamping shaft 17 and is not easy to fall off. After the workpiece is mounted on the clamping shaft 17, the clamping shaft 17 can be transferred between the transport line 1 and each work unit, and then removed from the clamping shaft after the workpiece completes all processes.

[0094] The workpiece can be made of a variety of materials: metal, non-metal, plastic, glass, stone, ceramic, wood and composite materials, etc.

[0095] Beneficial effects of the above technical solution:

[0096] The surface treatment assembly line for building block-assembled items described in the present invention can arrange the operating units in different orders or quantities on the conveyor line according to different products and different processes. The assembly line can be flexibly adjusted as needed to reduce the floor space and can quickly respond to changes in market demand.

[0097] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, 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 understood as limiting the present invention.

[0098] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0099] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A surface treatment line for building block-type items, characterized in that: It comprises a conveyor line (1) and a plurality of operating units arranged on the sides of the conveyor line (1). Depending on different production processes, the operating units are arranged in different orders and quantities on one side or both sides of the conveyor line (1).

2. The surface treatment line for building block-type items according to claim 1, characterized in that: The conveying line (1) is connected in sequence by a plurality of conveying modules, and the number of the conveying modules corresponds to the number of the operation units.

3. The surface treatment line for building block-type items according to claim 2, characterized in that: The operation unit includes a pre-treatment unit (2), a primary coating unit (3), a primer unit (4), a metallization unit (5) and a top coating unit (6); The pretreatment unit (2) is used to clean dust and oil stains on the workpiece surface, clean the cloak wire drawing, and enhance the surface activity; The primary coating unit (3) is used for modifying the surface of the workpiece; The primer unit (4) is used for spraying primer on the workpiece; The metallization unit (5) is used to plate a metal film on the surface of the workpiece; The surface coating unit (6) is used for spraying protective paint on the surface of the workpiece coated with the metal film.

4. The surface treatment line for building block-type items according to claim 3, characterized in that: The operation unit also includes a testing unit, a defective product processing unit and a finished product marking processing unit; The detection unit is arranged at the rear side of the top coating unit (6), and is used to detect the spraying quality of the workpiece after the protective paint is sprayed; Defective product processing unit, recycling and inspection unit detects unqualified workpieces; The finished product identification processing unit prints or inkjet codes on the workpieces that have passed the inspection of the inspection unit.

5. The surface treatment line for building block-type items according to claim 4, characterized in that: The conveyor line (1) and each operating unit are provided with a programmable controller, and the programmable controller is used to control the operating state and processing parameters of the corresponding conveyor line (1) or operating unit; The operating status includes the start status, stop status or automatic bypass status.

6. The surface treatment line for building block-type items according to claim 5, characterized in that: A lifting and transferring mechanism is provided on a side of each operation unit close to the conveying line (1), and the lifting and transferring mechanism is used to transfer the workpiece between the conveying line (1) and the operation unit.

7. The surface treatment line for building block-type items according to claim 6, characterized in that: The lifting and transferring mechanism comprises a gantry (7) and a rotating power assembly (8) arranged on the gantry (7); a connecting frame (9) is arranged on the power output shaft of the rotating power assembly (8); a lifting frame (11) is slidingly arranged at the lower part of the connecting frame (9); two groups of clamping assemblies are symmetrically arranged at the bottom of the lifting frame (11); and the clamping assemblies are used to clamp or release workpieces.

8. The surface treatment line for building block-type items according to claim 7, characterized in that: A lifting power assembly (10) is fixedly arranged on the bottom plate (91) of the connecting frame (9), and a piston rod (101) of the lifting power assembly (10) penetrates the bottom plate (91) of the connecting frame (9), extends to the lower part of the connecting frame (9), and is connected to the lifting frame (11).

9. The surface treatment line for building block-type items according to claim 7, characterized in that: The clamping assembly comprises a first clamping jaw (12) and a second clamping jaw (13) which are slidably arranged on a slide rail (14); the first clamping jaw (12) and the second clamping jaw (13) are arranged opposite to each other.

10. The surface treatment production line for building block-type items according to claim 7, characterized in that: A conveying carriage (15) is slidably provided on the conveying line (1), and an operating carriage (16) is slidably provided in the operating unit. A clamping shaft (17) for mounting a workpiece can be detachably provided on both the conveying carriage (15) and the operating carriage (16). When the lifting and transferring mechanism transfers the workpiece, two groups of clamping assemblies clamp the clamping shafts (17) of the conveying carriage (15) and the operating carriage (16) respectively, and transfer the clamping shaft (17) between the conveying carriage (15) and the operating carriage (16).

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