CN115475714B - Metal product plastic spraying assembly line and plastic spraying process thereof - Google Patents
Metal product plastic spraying assembly line and plastic spraying process thereof Download PDFInfo
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- CN115475714B CN115475714B CN202210890383.9A CN202210890383A CN115475714B CN 115475714 B CN115475714 B CN 115475714B CN 202210890383 A CN202210890383 A CN 202210890383A CN 115475714 B CN115475714 B CN 115475714B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/02—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work
- B05B13/0221—Means for supporting work; Arrangement or mounting of spray heads; Adaptation or arrangement of means for feeding work characterised by the means for moving or conveying the objects or other work, e.g. conveyor belts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
- B05B14/40—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths
- B05B14/48—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths specially adapted for particulate material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B16/00—Spray booths
- B05B16/20—Arrangements for spraying in combination with other operations, e.g. drying; Arrangements enabling a combination of spraying operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The invention relates to the field of metal spraying, in particular to a metal product spraying assembly line and a metal product spraying process. A metal product plastic spraying assembly line comprises a conveying track, a plurality of hooks, a base powder spraying device, a base powder curing channel, a flour spraying device and a flour curing channel, wherein the conveying track is circularly arranged, the hooks are arranged on the conveying track and move along the conveying track, and the base powder spraying device, the base powder curing channel, the flour spraying device and the flour curing channel are arranged on a conveying track path; the conveying track comprises a blank upper hanging section, a front cleaning section, a bottom film spray forming section, a mask spray forming section and a finished product unloading section which are sequentially arranged along the conveying direction; the bottom film spray forming section comprises a bottom powder spray section passing through bottom powder spray equipment, a bottom powder coating film solidifying section passing through a bottom powder solidifying channel and a bottom film cooling section; the forming section of the mask spraying section comprises a flour spraying section passing through flour spraying equipment, a flour film solidifying section passing through a flour solidifying channel and a mask cooling section.
Description
Technical Field
The invention relates to the field of metal spraying, in particular to a metal product spraying assembly line.
Background
The metal products such as the pull baskets, the bowl and dish baskets and the like for the kitchen need to use metal workpieces, and the metal workpieces can be sprayed with external powder (plastic spraying treatment) for keeping long-term attractive effect and service life, so that the outer surfaces of the metal workpieces are coated with at least one oxidation-resistant protective surface layer, and the metal workpieces have good surface texture.
The plastic spraying treatment of the existing metal workpiece adopts a coating production line as described in the publication No. CN210449659U, and comprises the following steps: an automatic coating unit for spraying the part to be processed; the high-temperature curing furnace is used for curing the coating of the automobile disc brake component after the spraying step by using a controllable distributed heating mode; the air cooling device is used for cooling the automobile disc brake component after coating solidification is completed; the net belt conveyor belt is used for conveying the parts to be processed and is arranged at the high-temperature curing furnace and the air cooling device. Such spray lines are only suitable for single sided sprayed parts, such as automotive disc brake parts; but not for fully sprayed parts. And the spraying production line is characterized in that all devices are arranged linearly, so that the occupied space is large.
Further, electrostatic powder spraying is a new technology in the field of modern coating industry, and is a process for replacing paint spraying, so that the superiority is quite obvious. Electrostatic spraying can be carried out in the powder spraying room generally, the powder spraying room generally can set up the feed inlet and the suspension conveying chain that is located the powder spraying room top, carry the work piece into the feed inlet of powder spraying room through suspension conveying chain, and carry out the operation of spraying powder through the powder spraying pipeline and the powder spraying head that set up in the powder spraying room, the work piece that are sprayed is anodal, the powder spraying head department is connected with the needle gun that discharges, will produce corona discharge phenomenon through the needle that discharges, negatively charged powder particle reaches the surface of work piece under the injection effect of powder spraying head this moment, because electrostatic force attracts, make the powder adsorb in the surface of work piece, until the work piece transports out the discharge gate.
The utility model provides an existing powder spraying room can refer to the static spraying device of self-sealing circulation powder that bulletin number was described in CN214717597U, includes the spray booth, the inside top surface middle part position fixedly connected with conveyer chain of spray booth, the lower surface fixedly connected with motor of conveyer chain, the output fixedly connected with hanger of motor, both sides all fixedly connected with dryer around the inside top surface of spray booth, and the dryer does not conflict with the position of conveyer chain, the inside both sides inner wall of spray booth all is provided with the shower nozzle, the lower surface middle part position of spray booth is connected with the powder return pipe. In the spraying device, a powder return pipe is connected to the middle of the lower surface of the spraying chamber and used for recovering powder; however, in actual use, the dust has high adsorptivity and is easily deposited on the inclined surface of the lower surface of the spray booth.
Further, the structure is connected with a powder return pipe at the middle part of the lower surface of the spraying chamber, and a circulating pipe structure is provided. However, since the recovery tank at the bottom of the apparatus is an open tank, the wind pressure is insufficient, and therefore dust on both sides (direction perpendicular to the paper surface in the drawing) of the apparatus is hardly absorbed into the dust return pipe.
Disclosure of Invention
In order to solve the above problems, a first object of the present invention is to provide a metal product spraying line.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a metal product plastic spraying assembly line comprises a conveying track, a plurality of hooks, a base powder spraying device, a base powder curing channel, a flour spraying device and a flour curing channel, wherein the conveying track is circularly arranged, the hooks are arranged on the conveying track and move along the conveying track, and the base powder spraying device, the base powder curing channel, the flour spraying device and the flour curing channel are arranged on a conveying track path; the conveying track comprises a blank upper hanging section, a front cleaning section, a bottom film spray forming section, a mask spray forming section and a finished product unloading section which are sequentially arranged along the conveying direction; the bottom film spray forming section comprises a bottom powder spray section passing through bottom powder spray equipment, a bottom powder coating film solidifying section passing through a bottom powder solidifying channel and a bottom film cooling section; the forming section of the mask spraying section comprises a flour spraying section passing through flour spraying equipment, a flour film solidifying section passing through a flour solidifying channel and a mask cooling section; the powder spraying equipment comprises a powder spraying room, wherein the powder spraying room comprises a powder spraying room and two groups of powder spraying devices arranged in the powder spraying room; a pendant channel is formed in the middle of the powder spraying chamber, and a pendant conveying guide rail is arranged above the pendant channel; the two groups of powder spraying devices are distributed on the outer sides of the powder spraying chambers on the two sides of the pendant channel; the powder spraying device comprises a plurality of powder spraying pipes extending into the powder spraying chamber from the side wall and a lifting mechanism for driving the plurality of powder spraying pipes to longitudinally reciprocate; the powder spraying room bottom below the pendant passageway is constructed with the recovery chamber, and the powder spraying room bottom plate of retrieving chamber open-top both sides is constructed to follow outside to inboard declivity inclined plane gradually, a plurality of air blowing pipes of arranging along pendant direction of delivery on the powder spraying room lateral wall in the inclined plane outside.
The technical scheme is that the metal workpiece plastic spraying assembly line comprises a conveying rail which is circularly arranged, hooks on the conveying rail are used for hanging hardware to be sprayed, and the hardware is conveyed along the conveying rail to be subjected to front cleaning, base film spraying and surface film spraying, so that automatic plastic spraying is realized. The hardware is arranged in a hanging mode, and comprehensive plastic spraying treatment on the outer surface of the hardware is facilitated. Specifically, when the hardware passes through the bottom powder spraying section, the bottom powder spraying equipment performs powder spraying treatment on the hardware to ensure that the surface of the hardware is fully covered with powder, then the hardware is heated through a bottom powder curing channel in a bottom powder coating curing section to enable the powder to be fused into a bottom film, and finally the hardware is naturally cooled in a bottom film cooling section; realizing the spraying of the bottom film; the mask spraying is referred to the above-mentioned base film spraying, and will not be described here in detail.
Further, the powder spraying devices are respectively arranged at two sides of the powder spraying chamber of the base powder spraying equipment, and a hanging part channel is formed in the middle of the powder spraying chamber between the powder spraying devices at two sides. When the metal hanging device is used, the metal hanging piece subjected to surface pre-cleaning treatment is hung on the hanging piece conveying guide rail of the hanging piece channel, and the metal hanging piece slowly or intermittently passes through the hanging piece channel after being sent into the powder spraying room. In the process, a plurality of powder spraying pipes in the powder spraying devices at two sides longitudinally reciprocate to spray powder so as to ensure that powder is uniformly distributed on each outer wall of the metal hanging piece. The redundant powder is adsorbed on the inclined plane of the bottom plate of the powder spraying chamber or the upper end surface of the turnover cover in the sinking process, and the powder adsorbed on the inclined plane of the bottom plate of the powder spraying chamber can be collected to the recovery cavity under the action of the air blowing pipe on the side wall of the powder spraying chamber, so that the recovery efficiency of the powder is improved.
In a further scheme, one side of the recovery cavity is connected with a powder spraying recovery system, a flip cover is arranged on the top opening of the recovery cavity, the front end and the rear end of the flip cover are respectively hinged to the inner wall of the powder spraying chamber, and the flip cover is driven by a driving part to intermittently rotate. According to the scheme, a flip cover is arranged on the top opening of the recovery cavity, and the upper end face of the flip cover can be used for temporarily storing powder; powder adsorbed on the inclined plane of the bottom plate of the powder spraying room can be collected to the upper end face of the flip under the action of the air blowing pipe on the side wall of the powder spraying room. When the set time or the set accumulation amount is reached, the powder is poured into the recovery chamber by a flip-flop manner. The flip covers the upper end of the recovery cavity, and a closed recovery cavity is constructed; when the flip cover basically covers the top opening of the recovery cavity, the inner space of the recovery cavity is similar to an air channel, the wind power is strong, and powder is easier to be absorbed into the powder spraying recovery system.
Preferably, a plurality of powder spraying pipes of the powder spraying devices on two sides are arranged in a staggered mode, and the staggered powder spraying pipes are beneficial to ensuring uniform powder distribution in the powder spraying chambers. The powder spraying device comprises a distributing pipe arranged along the conveying direction of the hanging piece, the distributing pipe is connected with the powder supply box, and the outer ends of the plurality of powder spraying pipes are connected to the distributing pipe. In operation, powder is fed from the powder feed box into the distribution pipe and then into each of the powder spraying pipes through the distribution pipe. The distribution pipe is adopted for distribution, so that uniform distribution is facilitated, and the connecting structure is simplified. The side wall of the powder spraying chamber is provided with a plurality of longitudinal through holes, the powder spraying pipe is arranged in the longitudinal through holes and can reciprocate along the longitudinal through holes, and the longitudinal through holes provide conditions for the longitudinal movement of the powder spraying pipe.
Preferably, the powder spraying room further comprises a front observation room arranged at the upstream of the powder spraying room and a rear observation room arranged at the downstream of the powder spraying room. The front observation chamber and the rear observation chamber are used for detection work of workers, the front observation chamber can be used for observing whether a blank to be sprayed with powder is qualified or not, the rear observation chamber can be used for observing whether powder spraying is qualified or not, and manual spot spraying can be performed on a leakage point.
Preferably, the powder spraying recovery system comprises a cyclone separator and a filter element filter which are sequentially connected to a powder spraying room through pipelines, wherein a recovery pipeline is arranged at the bottom of the cyclone separator and is connected with a powder supply box; in this scheme, cyclone and filter core filter are prior art, and wherein cyclone can be used to separate the powder, and the powder after the separation can directly be used to retrieve the use, and filter core filter then can be to the gaseous filtration after the separation, avoids partial powder to be discharged into the air, causes operational environment's pollution. Specifically, the cyclone separator comprises a support and two cyclone separation units arranged on the support, wherein the cyclone separation units are in a conical shape with large upper end caliber and small lower end caliber, the lower end of each cyclone separation unit is provided with a recovery pipeline, and an air inlet and an air outlet are arranged in the middle of the upper ends of the two cyclone separation units. And two cyclone separation units are adopted, so that the separation efficiency is improved. When the cyclone separator is used, powder sent out by the recovery cavity of the powder spraying room is sent into the air inlet of the cyclone separator through the pipeline, the powder enters the two cyclone separation units from the air inlet to be separated, the separated powder is recovered by the recovery pipeline at the lower end of the cyclone separation units, and air is introduced into the filter element filter through the air outlet.
Preferably, the base powder coating curing section and the flour coating curing section are respectively and roundabout arranged inside the base powder curing channel and the flour curing channel, and each of the base powder coating curing section and the flour coating curing section at least comprises two straight line sections and a bending section connected to the ends of the two straight line sections. In this scheme, this metal work piece plastic spraying assembly line adopts circuitous, cyclic mode to arrange, is favorable to reducing the occupation space of whole assembly line, and has prolonged the inside heating curing time in base powder solidification passageway and flour solidification passageway, guarantees the quality of heating curing. The middle part of the base powder solidifying channel is provided with a base powder solidifying heater, and the middle part of the flour solidifying channel is provided with a flour solidifying heater. The bottom powder curing heater and the flour curing heater are arranged in the middle, so that the uniform heat quantity in the bottom powder curing channel and the flour curing channel is facilitated.
In a further scheme, the base powder curing channel and the flour curing channel are both constructed into linear channels with one end open and one end closed, the base powder coating film curing section and the flour coating film curing section comprise even number of linear sections, and the base powder coating film curing section and the flour coating film curing section extend into and out from the open ends of the base powder curing channel and the flour curing channel; the closed end width of the bottom powder solidifying channel and the flour solidifying channel is larger than the open end width, and the bending Duan Bu is arranged in the closed end. In this scheme, the base powder solidifying channel and the flour solidifying channel are opened at only one end, and the width of the closed end is larger than the width of the opened end. The scheme realizes the roundabout arrangement of the base powder coating curing section and the flour coating curing section in the base powder curing channel and the flour curing channel, and prolongs the path length of the base powder coating curing section and the flour coating curing section on the basis of smaller occupied space, thereby prolonging the heating treatment time.
Preferably, the pre-cleaning section comprises a pre-degreasing spraying section, a main degreasing spraying section, a plurality of washing spraying sections and a silane spraying section which are sequentially arranged in the spraying channel, a dripping section arranged above the water receiving tank, a drying section arranged in the dehydration drying channel and a pre-spraying inspection section arranged at the upstream of the base powder spraying equipment; and a dehydration and drying heater is arranged in the middle of the dehydration drying channel. The metal workpiece is cleaned in advance in the conveying process, specifically, the metal workpiece sequentially passes through pre-degreasing spraying, main degreasing spraying, repeated washing spraying and silane spraying, then dripping water and draining are carried out, and finally dehydration and drying are carried out, so that the surface cleanliness of the metal workpiece before the spraying of the base film is guaranteed to reach GB/T8923 Sa2.5 level.
Preferably, the hooks on the conveying track are driven by a plurality of groups of driving devices arranged along the conveying direction, the driving devices comprise a driving shell, and a driving motor, a transmission assembly and a traction assembly which are arranged inside the driving shell, the driving motor drives the traction assembly through the transmission assembly, the traction assembly is connected with a traction rope on the conveying track, and the hooks are arranged on the traction rope. A plurality of groups of driving devices are arranged on the conveying track so as to drive the hooks to advance. The driving motor in the driving device drives the traction assembly to move through the transmission assembly, and the traction assembly can pull the traction rope in a traction wheel mode, so that the hook and a workpiece on the hook are driven to move.
The second object of the invention is to provide a plastic spraying process for metal products, which is characterized by comprising the following steps:
1, hanging a metal product blank to be processed on a hook of a conveying track;
2, transporting the metal product blank along a conveying track, and conveying the metal product blank into a spraying channel to sequentially perform pre-degreasing spraying, main degreasing spraying, repeated washing spraying sections and silane spraying sections;
3, naturally draining water above the water receiving tank after spray pretreatment, then introducing into a dehydration drying tunnel for drying, naturally cooling after drying, and simultaneously detecting whether the sample is qualified;
4, feeding the powder into a powder spraying device for powder spraying, and manually checking when spraying is carried out, and manually supplementing if a leakage point is found;
5, the blank sprayed with the base powder is sent into a base powder solidifying channel for heating and solidifying, the temperature in the base powder solidifying channel is kept between 180 ℃ and 220 ℃, and the blank is naturally cooled in a base film cooling section after heating and solidifying;
6, feeding the powder into a flour spraying device for flour spraying, and manually checking when spraying is carried out, and manually supplementing spraying if a leakage point is found;
7, feeding the blank sprayed with flour into a flour solidification channel for heating and solidifying, keeping the temperature in the flour solidification channel between 180 ℃ and 220 ℃, and naturally cooling in a mask cooling section after heating and solidifying to construct a finished product;
and 8, unloading the finished product on the hook, and checking and packaging.
Drawings
FIG. 1 is a schematic diagram of a plastic spraying assembly line structure according to the present invention.
Fig. 2 is a schematic structural view of the driving device.
Fig. 3 is a schematic structural view of the powder coating apparatus.
Fig. 4 is a schematic view of the internal structure of the powder spraying room.
Fig. 5 is a schematic view of the cyclone separator.
Fig. 6 is a schematic structural view of a cartridge filter.
Fig. 7 is a flow chart of a plastic spraying process according to the invention.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more, unless otherwise clearly defined.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
Example 1:
as shown in fig. 1 to 6, the present embodiment relates to a metal workpiece plastic spraying assembly line, which includes a conveying track 10 that is circularly arranged, a plurality of hooks 11 that are disposed on the conveying track 10 and move along the conveying track, and a powder spraying device 2, a powder curing channel 3, a powder spraying device 4 and a powder curing channel 5 that are disposed on the path of the conveying track 10. The hooks 11 on the conveying track 10 are driven by a plurality of groups of driving devices 6 arranged along the conveying direction, the driving devices 6 shown in fig. 2 comprise a driving shell 61, and a driving motor 62, a transmission assembly 63 and a traction assembly 64 which are arranged inside the driving shell 61, the driving motor 62 drives the traction assembly 64 through the transmission assembly 63, the traction assembly 64 is connected with a traction rope on the conveying track 10, and the hooks 11 are arranged on the traction rope. In this solution, a plurality of sets of driving devices 6 are arranged on the conveying track 10 so as to drive the hooks 11 to advance. The driving motor 62 in the driving device 6 drives the traction assembly 64 to move through the transmission assembly 63, and the traction assembly 64 can pull the traction rope in a traction wheel mode, so that the hook 11 and a workpiece on the hook are driven to move.
The conveying track 10 comprises a blank upper hanging section a, a front cleaning section, a bottom film spray forming section, a mask spray forming section and a finished product unloading section p which are sequentially arranged along the conveying direction.
The front cleaning section comprises a pre-degreasing spraying section b, a main degreasing spraying section c, a plurality of washing spraying sections d and a silane spraying section e which are sequentially arranged in the spraying channel 7, a dripping section f which is arranged above the water receiving groove, a drying section g which is arranged in the dehydration drying channel 8, and a pre-spraying inspection section h which is arranged at the upstream of the base powder spraying equipment 2. A dehydrating and drying heater 81 is arranged in the middle of the dehydrating and drying channel 8. In the scheme, the metal workpiece is cleaned in advance in the conveying process, specifically, the metal workpiece is sprayed through pre-degreasing spraying, main degreasing spraying, repeated washing spraying and silane spraying, then dripping water and draining are carried out, and finally dehydration and drying are carried out, so that the surface cleanliness of the metal workpiece before the spraying of the base film is guaranteed to reach GB/T8923 Sa2.5 level.
The base film spray forming section comprises a base powder spray section i passing through base powder spray equipment 2, a base powder coating film solidifying section j passing through a base powder solidifying channel 3 and a base film cooling section k. The mask spraying section forming section comprises a flour spraying section L passing through a flour spraying device 4, a flour coating film solidifying section m passing through a flour solidifying channel 5 and a mask cooling section n. The middle part of the base powder curing channel 3 is provided with a base powder curing heater 31, and the middle part of the flour curing channel 5 is provided with a flour curing heater 51. The bottom powder curing heater 31 and the flour curing heater 51 are arranged in the middle, so that the heat inside the bottom powder curing channel 3 and the flour curing channel 5 is uniform.
In a further scheme, the base powder coating film curing section j and the flour coating film curing section m are respectively and roundabout arranged inside the base powder curing channel 3 and the flour curing channel 5, and each of the base powder coating film curing section j and the flour coating film curing section m at least comprises two straight-line sections and a bending section connected to the ends of the two straight-line sections. Specifically, the base powder curing channel 3 and the flour curing channel 5 are both constructed as linear channels with one open end and one closed end, the base powder coating film curing section j and the flour coating film curing section m comprise even number of linear sections, and the base powder coating film curing section j and the flour coating film curing section m extend into and out from the open ends of the base powder curing channel 3 and the flour curing channel 5. The width of the closed ends of the bottom powder solidifying channel 3 and the flour solidifying channel 5 is larger than that of the open end, and the bending Duan Bu is arranged in the closed ends. In this embodiment, the base powder solidifying passage 3 and the flour solidifying passage 5 are opened at only one end, and the closed end width is larger than the open end width. The scheme realizes the roundabout arrangement of the base powder coating film curing section j and the flour coating film curing section m in the base powder curing channel 3 and the flour curing channel 5, and prolongs the path length of the base powder coating film curing section j and the flour coating film curing section m on the basis of smaller occupied space, thereby prolonging the heating treatment time.
The conveying track 10 of the metal workpiece plastic spraying assembly line is circularly arranged, and the hooks 11 on the conveying track 10 are used for hanging metal workpieces to be sprayed with plastic, so that the metal workpieces are conveyed along the conveying track 10 to be subjected to front cleaning, primer spraying and surface film spraying, and automatic plastic spraying is realized. Specifically, when the metal workpiece passes through the base powder spraying section i, the base powder spraying equipment 2 performs powder spraying treatment on the metal workpiece so as to ensure that powder is fully distributed on the surface of the metal workpiece, then the metal workpiece is heated through the base powder curing channel 3 in the base powder coating curing section j so as to fuse the powder into a base film, and finally the metal workpiece is naturally cooled in the base film cooling section k. Realizing the spraying of the bottom film. The mask spraying is referred to the above-mentioned base film spraying, and will not be described here in detail.
Compared with the coating production line recorded in the background technology, the metal workpiece plastic spraying production line in the scheme has the following advantages:
1, this scheme adopts the suspension type to set up the metal work piece, is favorable to the comprehensive plastic spraying treatment to metal work piece surface.
2, circularly conveying the metal workpiece by adopting a conveying track 10, and respectively arranging a base powder coating curing section j and a flour coating curing section m inside a base powder curing channel 3 and a flour curing channel 5 in a roundabout way, wherein the base powder coating curing section j and the flour coating curing section m at least comprise two straight-line sections and bending sections connected to the ends of the two straight-line sections. Therefore, the metal workpiece plastic spraying assembly line adopts a roundabout and circulating mode, which is beneficial to reducing the occupied space of the whole assembly line, prolongs the heating and curing time in the bottom powder curing channel 3 and the flour curing channel 5, and ensures the quality of heating and curing.
As shown in fig. 3-6, the base powder spraying apparatus 2 includes a powder spray booth 20 and a powder spray recovery system. The powder spraying room 20 comprises a powder spraying room 21, two groups of powder spraying devices 22 arranged in the powder spraying room 21, a front observing room 23 arranged at the upstream of the powder spraying room 21, and a rear observing room 24 arranged at the downstream of the powder spraying room 21. A pendant channel 211 is formed in the middle of the powder spraying chamber 21, and a pendant conveying guide rail 212 is provided above the pendant channel 211. The front observation chamber 23 and the rear observation chamber 24 are used for detection work of workers, wherein the front observation chamber 23 can be used for observing whether a blank to be sprayed with powder is qualified or not, the rear observation chamber 24 can be used for observing whether the powder spraying is qualified or not, and manual spot spraying can be performed on a leakage point.
The two groups of powder spraying devices 22 are distributed outside the powder spraying chambers 21 at two sides of the hanging part channel 211, and the powder spraying devices 22 comprise a plurality of powder spraying pipes 221 extending into the powder spraying chambers 21 from the side walls, and a lifting mechanism 222 driving the plurality of powder spraying pipes 221 to longitudinally reciprocate. In a further embodiment as shown in the drawings, a plurality of longitudinal through holes 213 are arranged on the side wall of the powder spraying chamber 21, and the powder spraying pipe 221 is disposed in the longitudinal through holes 213 and can reciprocate along the longitudinal through holes 213, and the longitudinal through holes 213 provide conditions for the longitudinal movement of the powder spraying pipe 221. The powder spraying pipes 221 of the powder spraying devices 22 on the two sides are arranged in a staggered mode, and the staggered powder spraying pipes 221 are beneficial to ensuring uniform powder distribution in the powder spraying chamber 21. The powder spraying device 22 comprises a distributing pipe 223 arranged along the conveying direction of the hanging piece, the distributing pipe 223 is connected with a powder supply box, and the outer ends of the plurality of powder spraying pipes 221 are connected with the distributing pipe 223. In this embodiment, powder is fed from a powder supply box into a distribution pipe 223 and then fed through the distribution pipe 223 into each of the powder-spraying pipes 221.
The bottom of the powder spraying room 20 below the hanging part channel 211 is provided with a recovery cavity 201, the bottom plates of the powder spraying rooms 21 at two sides of the top opening of the recovery cavity 201 are provided with inclined planes 202 which incline downwards gradually from the outer side to the inner side, and a plurality of air blowing pipes 203 are arranged on the side wall of the powder spraying room 20 at the outer side of the inclined planes 202 along the conveying direction of the hanging parts. One side of the recovery cavity 201 is connected with a powder spraying recovery system, a flip 204 is arranged on the top opening of the recovery cavity 201, the front end and the rear end of the flip 204 are respectively hinged on the inner wall of the powder spraying chamber 21, and the flip 204 is driven by a driving component to intermittently rotate.
The powder spraying device 2 is provided with powder spraying devices 22 on two sides of the powder spraying chamber 21, and a hanging part channel 211 is formed in the middle of the powder spraying chamber 21 between the powder spraying devices 22 on two sides. When in use, the metal hanging piece subjected to surface pre-cleaning treatment is hung on the hanging piece conveying guide rail 212 of the hanging piece channel 211, and the metal hanging piece slowly or intermittently passes through the hanging piece channel 211 after being sent into the powder spraying room 20. In this process, the powder spraying pipes 221 of the two-side powder spraying device 22 reciprocate longitudinally to spray powder, so as to ensure that powder is uniformly distributed on each outer wall of the metal hanger.
The superfluous powder is adsorbed on the inclined plane 202 of the bottom plate of the powder spraying chamber 21 or the upper end surface of the turnover cover 204 in the sinking process, and the powder adsorbed on the inclined plane 202 of the bottom plate of the powder spraying chamber 21 is collected to the upper end surface of the turnover cover 204 under the action of the air blowing pipe 203 on the side wall of the powder spraying chamber 20, and under the condition that the set time or the set accumulation amount is reached, the turnover cover 204 turns over under the action of the driving part and the powder on the upper end surface of the turnover cover is poured into the recovery cavity 201 below, so that the powder enters the powder spraying recovery system for recovery and utilization.
In a further scheme as shown in fig. 3, the powder spraying recovery system comprises a cyclone 25 and a filter element 26 which are sequentially connected to the powder spraying room 20 through pipelines, wherein a recovery pipeline 251 is arranged at the bottom of the cyclone 25, and the recovery pipeline 251 is connected with a powder supply box. In this scheme, cyclone 25 and filter element filter 26 are prior art, and wherein cyclone 25 can be used to separate the powder, and the powder after the separation can be directly used for recycling, and filter element filter 26 then can filter the gas after the separation, avoids partial powder to be discharged into the air, causes operational environment's pollution. In a further scheme, the cyclone separator 25 includes a support 252, and two cyclone separation units 253 disposed on the support 252, where the cyclone separation units 253 are in a cone shape with a large upper end caliber and a small lower end caliber, the lower end of each cyclone separation unit 253 is provided with a recovery pipe 251, and an air inlet 254 and an air outlet 255 are disposed between the upper ends of the two cyclone separation units 253. The two cyclone separating units 253 are adopted in the scheme, so that the separation efficiency is improved. In use, powder delivered from the recovery chamber 201 of the powder spraying room 20 is sent to the air inlet 254 of the cyclone separator 25 through a pipeline, the powder enters the two cyclone separation units 253 from the air inlet 254 for separation treatment, the separated powder is recovered by the recovery pipeline 251 at the lower end of the cyclone separation units 253, and air is introduced into the filter element filter 26 through the air outlet 255.
In summary, with the above structure, the powder spraying apparatus 2 has the following advantages compared with the background art:
1, the powder adsorbed on the inclined plane 202 of the bottom plate of the powder spraying chamber 21 by adopting the air blowing pipe 203 is collected on the upper end face of the flip 204, so that the dust recovery amount is improved, and the dust is prevented from being accumulated on the bottom plate of the powder spraying chamber 21.
2, a flip 204 is arranged on the top opening of the recovery cavity 201, the upper end surface of the flip 204 can be used for temporarily storing powder, and the powder is poured into the recovery cavity 201 in a turnover manner when the set time or the set accumulation amount is reached. The lid 204 thus covers the upper end of the recovery chamber 201, creating a closed recovery chamber 201. When the flip cover 204 basically covers the top opening of the recovery cavity 201, the internal space of the recovery cavity 201 is similar to an air duct, the wind power is strong, and the powder is easier to be absorbed into the powder spraying recovery system.
Example 2:
as shown in fig. 7, the present embodiment relates to a plastic spraying process for metal products, wherein the plastic spraying process adopts the plastic spraying line described in embodiment 1, and specifically comprises the following steps:
1, hanging a metal product blank to be processed on a hook 11 of a conveying track 10. The surface of the workpiece blank needs to be smooth, free of sand bonding, free of cold shock, free of air holes, free of pinholes, free of crinkles and free of cracks. And removing burrs, rust, white spots, oxide scales, greasy dirt, oil spots and welding oxides on the surface of the workpiece blank. The non-machined surface must be free of pits and bulges. No scrap iron or sand is contained in the screw hole.
2, transporting the metal product blank along a conveying track 10, and conveying the metal product blank into a spraying channel 7 to sequentially perform pre-degreasing spraying, main degreasing spraying, a multi-time washing spraying section d and a silane spraying section e.
Pre-degreasing spraying: spraying a solution containing 3% of degreasing agent and 0.3% of surfactant at 50-55deg.C for 1-2min, and performing the second ash removal and oil stain removal treatment. The free base number of the bath solution is kept between 15 and 17 during spraying.
And (3) main degreasing spraying: spraying the workpiece with a solution containing 3% of degreasing agent and 0.3% of surfactant at 50-55deg.C for 3-4min, and performing the third ash removal and oil stain removal treatment. The free base number of the bath solution is kept between 15 and 17 during spraying.
And (3) water washing and spraying for the first time: and (3) washing the degreased workpiece with tap water for 0.5min at normal temperature by first spraying.
And (3) washing and spraying for the second time: and (3) washing the degreased workpiece with tap water for 1-2min at normal temperature by first spraying.
And (3) washing and spraying for the third time: and (3) washing the degreased workpiece with tap water for 1-2min at normal temperature by first spraying.
Silane spraying: and spraying the water-washed workpiece with a silane solution for 1-2min at normal temperature, and performing silane film forming treatment.
And 3, naturally draining water above the water receiving tank after spray pretreatment, then introducing into a dehydration drying tunnel 8 for drying, naturally cooling after drying, and simultaneously detecting whether the sample is qualified.
And 4, feeding the powder into the powder spraying equipment 2 for powder spraying, and manually checking when spraying and feeding, and manually supplementing if a leakage point is found.
And 5, conveying the blank sprayed with the base powder into a base powder solidifying channel 3 for heating and solidifying, keeping the temperature in the base powder solidifying channel 3 between 180 ℃ and 220 ℃, and naturally cooling in a base film cooling section k after heating and solidifying.
And 6, feeding the powder into the flour spraying equipment 4 for flour spraying, and manually checking the powder when spraying and feeding, and manually supplementing the powder if a leakage point is found.
And 7, feeding the blank sprayed with flour into a flour solidification channel 5 for heating and solidifying, keeping the temperature in the flour solidification channel 5 between 180 ℃ and 220 ℃, and naturally cooling in a mask cooling section n after heating and solidifying to construct a finished product.
And 8, unloading the finished product on the hook 11 and checking and packaging.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations may be made in the above embodiments by those skilled in the art without departing from the spirit and principles of the invention.
Claims (10)
1. A metal product plastic spraying assembly line comprises a conveying track (10) which is circularly arranged, a plurality of hooks (11) which are arranged on the conveying track (10) and move along the conveying track, and a base powder spraying device (2), a base powder curing channel (3), a flour spraying device (4) and a flour curing channel (5) which are arranged on the path of the conveying track (10); the method is characterized in that: the conveying track (10) comprises a blank upper hanging section (a), a front cleaning section, a bottom film spray forming section, a mask spray forming section and a finished product unloading section (p) which are sequentially arranged along the conveying direction; the base film spray forming section comprises a base powder spray section (i) passing through base powder spray equipment (2), a base powder coating film curing section (j) passing through a base powder curing channel (3), and a base film cooling section (k); the mask spraying section forming section comprises a flour spraying section (L) passing through a flour spraying device (4), a flour film solidifying section (m) passing through a flour solidifying channel (5) and a mask cooling section (n); the base powder spraying equipment (2) comprises a powder spraying room (20), wherein the powder spraying room (20) comprises a powder spraying room (21) and two groups of powder spraying devices (22) arranged in the powder spraying room (21); a pendant channel (211) is formed in the middle of the powder spraying chamber (21), and a pendant conveying guide rail (212) is arranged above the pendant channel (211); two groups of powder spraying devices (22) are distributed outside the powder spraying chambers (21) at two sides of the pendant channel (211); the powder spraying device (22) comprises a plurality of powder spraying pipes (221) extending into the powder spraying chamber (21) from the side wall, and a lifting mechanism (222) for driving the plurality of powder spraying pipes (221) to longitudinally reciprocate; the bottom of the powder spraying room (20) below the hanging part channel (211) is provided with a recovery cavity (201), the bottom plates of the powder spraying rooms (21) at two sides of the top opening of the recovery cavity (201) are provided with inclined planes (202) which incline downwards gradually from the outer side to the inner side, and a plurality of air blowing pipes (203) are arranged on the side wall of the powder spraying room (20) at the outer side of the inclined planes (202) along the conveying direction of the hanging parts.
2. A metal product injection molding line according to claim 1, wherein: one side of the recovery cavity (201) is connected with a powder spraying recovery system, a flip (204) is arranged on the top opening of the recovery cavity (201), the front end and the rear end of the flip (204) are respectively hinged to the inner wall of the powder spraying chamber (21), and the flip (204) is driven by a driving part to intermittently rotate.
3. A metal product injection molding line according to claim 2, wherein: the powder spraying devices (22) on two sides are arranged in a staggered mode, each powder spraying device (22) comprises a distributing pipe (223) arranged along the conveying direction of the hanging piece, each distributing pipe (223) is connected with the powder supply box, and the outer ends of the plurality of powder spraying pipes (221) are connected to the distributing pipe (223); a plurality of longitudinal through holes (213) are arranged on the side wall of the powder spraying chamber (21), and a powder spraying pipe (221) is arranged in the longitudinal through holes (213) and can reciprocate along the longitudinal through holes (213).
4. A metal product injection molding line according to claim 1, wherein: the powder spraying room (20) further comprises a front observation chamber (23) arranged at the upstream of the powder spraying chamber (21), and a rear observation chamber (24) arranged at the downstream of the powder spraying chamber (21).
5. A metal product injection molding line according to claim 2, wherein: the powder spraying recovery system comprises a cyclone separator (25) and a filter element filter (26) which are sequentially connected to a powder spraying room (20) through pipelines, wherein a recovery pipeline (251) is arranged at the bottom of the cyclone separator (25), and the recovery pipeline (251) is connected with a powder supply box; the cyclone separator (25) comprises a support (252) and two cyclone separation units (253) arranged on the support (252), the cyclone separation units (253) are in a conical shape with large upper end caliber and small lower end caliber, the lower end of each cyclone separation unit (253) is provided with a recovery pipeline (251), and an air inlet (254) and an air outlet (255) are arranged in the middle of the upper ends of the two cyclone separation units (253).
6. A metal product injection molding line according to claim 1, wherein: the base powder coating curing section (j) and the flour coating curing section (m) are respectively and roundabout arranged in the base powder curing channel (3) and the flour curing channel (5), and each of the base powder coating curing section (j) and the flour coating curing section (m) at least comprises two straight-line sections and a bending section connected to the ends of the two straight-line sections; the middle part of the base powder solidifying channel (3) is provided with a base powder solidifying heater (31), and the middle part of the flour solidifying channel (5) is provided with a flour solidifying heater (51).
7. A metal product injection molding line according to claim 6, wherein: the base powder curing channel (3) and the flour curing channel (5) are both constructed into linear channels with one end open and one end closed, the base powder coating curing section (j) and the flour coating curing section (m) comprise even number of linear sections, and the base powder coating curing section (j) and the flour coating curing section (m) extend in and extend out from the open ends of the base powder curing channel (3) and the flour curing channel (5); the width of the closed end of the bottom powder solidifying channel (3) and the width of the closed end of the flour solidifying channel (5) are larger than the width of the open end, and the bending Duan Bu is arranged in the closed end.
8. A metal product injection molding line according to claim 1, wherein: the front cleaning section comprises a pre-degreasing spray section (b), a main degreasing spray section (c), a plurality of washing spray sections (d) and a silane spray section (e) which are sequentially arranged in a spray channel (7), a dripping section (f) arranged above a water receiving tank, a drying section (g) arranged in a dehydration drying channel (8) and a pre-spraying inspection section (h) arranged at the upstream of a base powder spraying device (2); the middle part of the dehydration drying tunnel (8) is provided with a dehydration drying heater (81).
9. A metal product injection molding line according to claim 1, wherein: the hanger (11) on the conveying track (10) is driven by a plurality of groups of driving devices (6) arranged along the conveying direction, each driving device (6) comprises a driving shell (61), a driving motor (62), a transmission assembly (63) and a traction assembly (64) which are arranged inside the driving shell (61), the driving motor (62) drives the traction assembly (64) through the transmission assembly (63), the traction assembly (64) is connected with a traction rope on the conveying track (10), and the hanger (11) is arranged on the traction rope.
10. A metal product injection molding method using the metal product injection molding line according to any one of claims 1 to 9, characterized by comprising the steps of:
1, hanging a metal product blank to be processed on a hook (11) of a conveying track (10);
2, transporting the metal product blank along a conveying track (10), and conveying the metal product blank into a spraying channel (7) to sequentially perform pre-degreasing spraying, main degreasing spraying, a repeated washing spraying section (d) and a silane spraying section (e);
3, naturally draining water above the water receiving tank after spray pretreatment, then introducing into a dehydration drying tunnel (8) for drying, naturally cooling after drying, and simultaneously detecting whether the sample is qualified;
4, feeding the powder into a powder spraying device (2) for powder spraying, and manually checking when spraying and feeding, and manually supplementing spraying if a leakage point is found;
5, feeding the blank sprayed with the base powder into a base powder solidifying channel (3) for heating and solidifying, keeping the temperature in the base powder solidifying channel (3) between 180 ℃ and 220 ℃, and naturally cooling in a base film cooling section (k) after heating and solidifying;
6, feeding the powder into a flour spraying device (4) for flour spraying, and manually checking when spraying is carried out, and manually supplementing spraying if a leakage point is found;
7, feeding the blank sprayed with flour into a flour solidification channel (5) for heating and solidifying, keeping the temperature in the flour solidification channel (5) between 180 ℃ and 220 ℃, and naturally cooling in a mask cooling section (n) after heating and solidifying to construct a finished product;
8, unloading the finished product on the hook (11) and checking and packaging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210890383.9A CN115475714B (en) | 2022-07-27 | 2022-07-27 | Metal product plastic spraying assembly line and plastic spraying process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210890383.9A CN115475714B (en) | 2022-07-27 | 2022-07-27 | Metal product plastic spraying assembly line and plastic spraying process thereof |
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| Publication Number | Publication Date |
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| CN115475714A CN115475714A (en) | 2022-12-16 |
| CN115475714B true CN115475714B (en) | 2023-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19643965A1 (en) * | 1996-10-31 | 1998-05-07 | Gerhard Hestermann | Single electrostatic plastic powder coating spray booth,for various colour powders with over-spray powder recovery |
| EP1378294A2 (en) * | 2002-07-06 | 2004-01-07 | Manfred Göttling | Powder coating installation |
| EP2803420A2 (en) * | 2013-04-24 | 2014-11-19 | Trasmetal S.p.A. | Improved booth for powder coating articles. |
| CN209121994U (en) * | 2018-11-05 | 2019-07-19 | 杭州凯畅五金制品有限公司 | A kind of kitchen hanger |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6730167B2 (en) * | 2000-10-05 | 2004-05-04 | Nordson Corporation | Powder coating spray booth with a powder extraction system |
-
2022
- 2022-07-27 CN CN202210890383.9A patent/CN115475714B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19643965A1 (en) * | 1996-10-31 | 1998-05-07 | Gerhard Hestermann | Single electrostatic plastic powder coating spray booth,for various colour powders with over-spray powder recovery |
| EP1378294A2 (en) * | 2002-07-06 | 2004-01-07 | Manfred Göttling | Powder coating installation |
| EP2803420A2 (en) * | 2013-04-24 | 2014-11-19 | Trasmetal S.p.A. | Improved booth for powder coating articles. |
| CN209121994U (en) * | 2018-11-05 | 2019-07-19 | 杭州凯畅五金制品有限公司 | A kind of kitchen hanger |
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|---|---|
| CN115475714A (en) | 2022-12-16 |
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