CN115368804A - Powder coating and spraying method with high powder coating efficiency - Google Patents
Powder coating and spraying method with high powder coating efficiency Download PDFInfo
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- CN115368804A CN115368804A CN202211132586.8A CN202211132586A CN115368804A CN 115368804 A CN115368804 A CN 115368804A CN 202211132586 A CN202211132586 A CN 202211132586A CN 115368804 A CN115368804 A CN 115368804A
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- 239000000843 powder Substances 0.000 title claims abstract description 96
- 238000000576 coating method Methods 0.000 title claims abstract description 52
- 239000011248 coating agent Substances 0.000 title claims abstract description 48
- 238000005507 spraying Methods 0.000 title claims abstract description 30
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 12
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 11
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 9
- UXBZSSBXGPYSIL-UHFFFAOYSA-N phosphoric acid;yttrium(3+) Chemical compound [Y+3].OP(O)(O)=O UXBZSSBXGPYSIL-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000000049 pigment Substances 0.000 claims abstract description 7
- 229910000164 yttrium(III) phosphate Inorganic materials 0.000 claims abstract description 7
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 6
- 239000003822 epoxy resin Substances 0.000 claims abstract description 6
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 6
- 229920001225 polyester resin Polymers 0.000 claims abstract description 6
- 239000004645 polyester resin Substances 0.000 claims abstract description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000007921 spray Substances 0.000 claims description 38
- 230000005540 biological transmission Effects 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 13
- ISAOCJYIOMOJEB-UHFFFAOYSA-N benzoin Chemical compound C=1C=CC=CC=1C(O)C(=O)C1=CC=CC=C1 ISAOCJYIOMOJEB-UHFFFAOYSA-N 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 238000000227 grinding Methods 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 6
- 244000028419 Styrax benzoin Species 0.000 claims description 5
- 235000000126 Styrax benzoin Nutrition 0.000 claims description 5
- 235000008411 Sumatra benzointree Nutrition 0.000 claims description 5
- 150000001450 anions Chemical class 0.000 claims description 5
- 229960002130 benzoin Drugs 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 239000007822 coupling agent Substances 0.000 claims description 5
- 235000019382 gum benzoic Nutrition 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 238000005192 partition Methods 0.000 claims description 2
- 238000007665 sagging Methods 0.000 abstract description 9
- 150000002500 ions Chemical class 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 238000011068 loading method Methods 0.000 description 7
- 239000003973 paint Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000007590 electrostatic spraying Methods 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- DWDQAMUKGDBIGM-UHFFFAOYSA-N phosphanylidyneyttrium Chemical compound [Y]#P DWDQAMUKGDBIGM-UHFFFAOYSA-N 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000010888 cage effect Methods 0.000 description 1
- 230000003047 cage effect Effects 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000002612 dispersion medium Substances 0.000 description 1
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- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- 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
- B05B13/0235—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 the movement of the objects being a combination of rotation and linear displacement
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/08—Plant for applying liquids or other fluent materials to objects
- B05B5/081—Plant for applying liquids or other fluent materials to objects specially adapted for treating particulate materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/08—Plant for applying liquids or other fluent materials to objects
- B05B5/082—Plant for applying liquids or other fluent materials to objects characterised by means for supporting, holding or conveying the objects
- B05B5/084—Plant for applying liquids or other fluent materials to objects characterised by means for supporting, holding or conveying the objects the objects lying on, or being supported above conveying means, e.g. conveyor belts
-
- 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
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/03—Powdery paints
- C09D5/033—Powdery paints characterised by the additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Electrostatic Spraying Apparatus (AREA)
Abstract
The invention discloses a powder coating, which is prepared from the following raw materials, by weight, 0.1-0.2 part of synthesized ultrafine aluminum silicate powder; 0.1-0.2 part of alumina C; 2-4 parts of negative ion powder; 0.05-0.08 part of single-layer graphene powder; 0.5-1 part of xenotime powder; 20-30 parts of epoxy resin; 20-30 parts of polyester resin; 3-5 parts of an auxiliary agent; 20-40 parts of calcium carbonate powder; 5-25 parts of pigment, wherein the resistivity of the powder coating is 89-94 omega.m. Aiming at the groove or concave angle spraying, the spraying coating has the effects of large coating coverage rate, no sagging on the surface and good surface leveling.
Description
Technical Field
The present invention relates to the field of coatings, in particular, to powder coatings.
Background
The powder paint is a solid powder synthetic resin paint composed of solid resin, pigment, filler and assistant, and is different from common solvent paint and water paint in that its dispersion medium is not solvent and water but air, it has the features of no solvent pollution, 100% filming and low energy consumption, and the powder paint has two main categories of thermoplasticity and thermosetting.
In the process of electrostatic spraying of powder coating, the powder coating rate of grooves or concave angles (dead corners) on the surface of a workpiece is often lower, the powder coating rate of the powder coating with the existing formula is only about 50% in the process of electrostatic spraying of the dead corners, the Chinese invention patent number is 201310374897X, and the patent name is a powder coating capable of submitting the powder coating rate of the dead corners of the metal workpiece and a preparation method thereof, and the powder coating rate of the existing formula is only about 40% -50%, and the powder coating rate of the dead corners of the metal workpiece is greatly improved to about 70% by adding an organic amine salt copolymer and a gas phase oxide into the conventional powder coating, so that the powder coating rate of 70% is lower for processing users, and further the working efficiency is low.
In order to improve the powder applying rate at dead corners, two aspects are mainly provided, firstly, the electrostatic shielding benefit is overcome, the electrification of powder is improved, and generally, an electrification auxiliary agent is used; and secondly, the Faraday cage effect is overcome, the powder resistivity is reduced, but the phenomena of sagging, thick accumulation and poor surface leveling of the surface of the workpiece can be caused by excessively reducing the resistivity, so that the invention provides a formula which has low resistivity, ensures no sagging on the surface and has good surface leveling.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, at least solves the technical problems in the related technology to a certain extent, and provides a powder coating so as to achieve the purpose of obviously improving the powder coating rate at dead corners.
The powder coating is prepared from the following raw materials, by weight, 0.1-0.2 part of synthesized ultrafine aluminum silicate powder; 0.1-0.2 part of alumina C; 2-4 parts of anion powder; 0.05-0.08 part of single-layer graphene powder; 0.5-1 part of xenotime powder; 20-30 parts of epoxy resin; 20-30 parts of polyester resin; 3-5 parts of an auxiliary agent; 20-40 parts of calcium carbonate powder; 5-25 parts of pigment, wherein the resistivity of the powder coating is 89-94 omega.m.
Further, the auxiliary agent comprises benzoin, an electric charge agent, a coupling agent and a leveling agent.
The invention also aims to overcome the defects in the prior art, at least solves the technical problems in the related art to a certain extent, and provides a spraying method for improving the powdering efficiency of a double-faced grooved hollow tube so as to achieve the purpose of obviously improving the powdering efficiency of the double-faced grooved hollow tube.
The spraying method for improving the powdering efficiency of the double-faced grooved hollow tube sequentially comprises the following steps,
a, arranging a workpiece on a rotary clamping cylinder of a transmission device, wherein the transmission device performs transmission at intervals;
b, mounting two groups of electrostatic spray guns on the two groups of up-down moving devices respectively, wherein the horizontal distance between the workpiece and the electrostatic spray guns is 15-20cm;
c, spraying the powder coating material of claim 1 or 2 on the workpiece by a first group of electrostatic spray guns up and down;
d, the transmission device transmits once, the rotary clamping cylinder rotates 180 degrees, and the second group of electrostatic spray guns aim the powder coating of claim 1 or 2 at the workpiece for up-and-down spraying;
e, the sprayed workpiece enters an oven for curing;
and f, cooling and taking out the workpiece.
Further, transmission includes the frame, including the drive sprocket that the level set up, a plurality of driven sprocket that the level set up, with drive chain and the rotatory motor of drive sprocket of drive sprocket and a plurality of driven sprocket meshing, the equipartition is fixed with a plurality of rotary clamping cylinder on the chain, the motor interval drive, transmission becomes the runway type and arranges, includes the material loading district in proper order, spouts material district, oven district, unloading district, the next door that the material loading position is in the unloading district.
Further, the up-and-down moving device comprises a mounting seat for mounting the electrostatic spray guns and a screw rod lifter, the mounting seat is fixed on the screw rod lifter to move up and down, and the two groups of electrostatic spray guns are respectively positioned in the material spraying area in parallel in sequence and are aligned to a workpiece.
The technical effects of the invention are mainly embodied in the following aspects: the resistance is reduced through the single-layer graphene powder and the phosphorus-yttrium ore powder, the superfine aluminum silicate powder and the single-layer graphene powder are synthesized in a combined mode, the surface of a sprayed workpiece is free of sagging and good in surface leveling property, corner thickness is prevented, the powder loading rate of the workpiece is guaranteed by absorbing and combining tiny dust and tiny particles on the surface of the workpiece through the negative ion powder, the specific formula is adopted, the resistivity of the powder is reduced on the basis of increasing the formulation with electric charge, the dispersing capacity, the flowability and the corner coating capacity of the powder coating are increased, meanwhile, the powder loading rate is enabled to reach about 90%, the surface is free of sagging, and the surface leveling property is good.
The transmission device of the method is arranged in a runway shape, and comprises a feeding area, a spraying area, an observation area, an oven area, a cooling area and a discharging area which are sequentially connected end to end, wherein the feeding area is positioned on a partition wall of the discharging area, a single person carries out feeding and discharging, the working efficiency is improved, and the clamping rotary cylinder is matched to carry out one-time double-sided spraying on a workpiece with grooves on both sides, so that the powder feeding rate and the powder feeding efficiency are improved.
Drawings
Fig. 1 is a schematic structural view of a transmission device.
Fig. 2 is a schematic structural diagram of a drive chain.
Fig. 3 is a schematic structural diagram of a workpiece.
Detailed Description
The following detailed description of the embodiments of the present invention is intended to be illustrative, but not limiting, of the invention so that the technical solutions of the invention may be more easily understood and appreciated.
Example 1
The powder coating is prepared from (by weight parts) synthetic superfine aluminum silicate powder 0.2; 0.2 part of aluminum oxide C; 4 parts of anion powder; 0.08 part of single-layer graphene powder; 1 part of xenotime powder; 30 parts of epoxy resin; 30 parts of polyester resin; 5 parts of an auxiliary agent; 40 parts of calcium carbonate powder; 25 parts of a pigment, wherein the resistivity of the powder coating is 89 omega m, and the weight ratio of benzoin to the charging agent to the coupling agent to the leveling agent is 1.
Example 2
The powder coating is prepared from (by weight parts) synthetic superfine aluminum silicate powder 0.15; 0.15 part of alumina C; 3 parts of anion powder; 0.06 part of single-layer graphene powder; 0.7 part of xenotime powder; 25 parts of epoxy resin; 25 parts of polyester resin; 4 parts of an auxiliary agent; 30 parts of calcium carbonate powder; and 15 parts of a pigment, wherein the resistivity of the powder coating is 91 omega-m, and the weight ratio of benzoin to the charging agent to the coupling agent to the leveling agent is 1.
Example 3
The powder coating is prepared from (by weight parts) synthetic superfine aluminum silicate powder 0.1; 0.1 part of aluminum oxide C; 2 parts of anion powder; 0.05 part of single-layer graphene powder; 0.5 part of xenotime powder; 20 parts of epoxy resin; 20 parts of polyester resin; 3 parts of an auxiliary agent; 20 parts of calcium carbonate powder; and 5 parts of a pigment, wherein the resistivity of the powder coating is 94 omega-m, and the weight ratio of benzoin to the charging agent to the coupling agent to the leveling agent is 1.
Example 4
Powder coating D was prepared in the same manner as in example 1 except that synthesized ultrafine aluminum silicate powder was not added.
Example 5
Powder coating E was prepared as in example 1, except that no alumina C was added.
Example 6
Powder coating F was prepared as in example 1, except that no negative ion powder was added.
Example 7
Powder coating G was prepared as in example 1, except that the single-layer graphene powder was not added.
Example 8
Powder coating H was prepared as in example 1, except that the xenotime powder was not added.
The prepared powder coatings A, B, C, D, E, F, G and H are reserved, workpieces with the same type (the workpieces are seat metal supporting pieces, the supporting pieces are provided with grooves, the depth of each groove is 1cm, the width of each groove is 0.5 cm) are arranged on a chain, the electrostatic spray guns descend and ascend under the action of an elevator to spray the workpieces once respectively (the moving speed of the electrostatic spray guns is 6 m/s), and the powder feeding rate, the surface sagging, the surface leveling condition and other phenomena are researched, and the specific characteristics are shown in the following table 1.
Table 1: research on powder coating rate, surface sagging and surface leveling conditions of workpieces for powder coatings with different formulas
The resistance is reduced through the single-layer graphene powder and the phosphorus-yttrium mineral powder, the superfine aluminum silicate powder and the single-layer graphene powder are synthesized in a combined mode, the surface of a sprayed workpiece is free of sagging and good in surface leveling, the corner is prevented from being thickened, the surface of the workpiece is cleaned before spraying, the negative ion powder is used for absorbing residual dust and micro-particles on the surface of the workpiece, the powder feeding rate and the surface leveling of the workpiece are guaranteed, the specific formula is adopted, the resistance of the powder is reduced on the basis of increasing the formulation of the electrification property, the dispersing capacity, the flowability and the corner coating capacity of the powder coating are increased, meanwhile, the powder feeding rate reaches about 90%, meanwhile, the surface is free of sagging, and the surface leveling is good.
Another object of the present invention is to solve the technical problems of the related art to at least some extent, and to provide a spraying method for improving the powdering efficiency of a double-sided grooved 001 hollow tube, so as to significantly improve the powdering efficiency of the double-sided grooved 001 hollow tube.
The spraying method for improving the powdering efficiency of the double-faced grooved hollow tube sequentially comprises the following steps,
a, fixedly arranging a workpiece on a rotary clamping cylinder 14 of a transmission device, and transmitting the transmission device at equal intervals;
b, mounting two groups of electrostatic spray guns on two groups of up-and-down moving devices respectively, wherein the horizontal distance between a workpiece and the electrostatic spray guns is 15-20cm;
c, spraying the powder coating material of claim 1 or 2 on the workpiece by a first group of electrostatic spray guns up and down;
d, once driving by a driving device, rotating the clamping cylinder 14 by 180 degrees, and aligning the powder coating of claim 1 or 2 to a workpiece by a second group of electrostatic spray guns for up-and-down spraying;
e, the sprayed workpiece enters an oven for curing;
and f, cooling and taking out the workpiece.
As shown in fig. 1, 2 and 3: transmission includes the frame, drive sprocket 11 including the level setting, a plurality of driven sprocket 12 of level setting, with drive chain 13 and the rotatory motor of drive sprocket 11 and a plurality of driven sprocket 12 meshing, the equipartition is fixed with a plurality of rotatory die clamping cylinder 14 on the chain, the motor interval drive, transmission becomes the runway type and arranges, include material loading district 01 in proper order, spout material district 02, oven district 03, unloading district 04, material loading district 01 is located the next door of unloading district 04.
Through the drive sprocket 11 of level setting, a plurality of driven sprocket 12 of level setting, make the chain form horizontally runway type form, improved the utilization ratio in space, realized semi-automatization's production, loading area 01 is located the next door in unloading district 04, has reduced the operation manual work, practices thrift the cost.
The transmission device performs interval transmission, on one hand, sufficient time is provided for feeding and discharging of an operator, on the other hand, sufficient time is provided for the electrostatic spray gun to ascend and descend for workpiece spraying, and the distance for the motor to drive the chain to advance every time is the same, and is the distance between the centers of any two adjacent rotary clamping cylinders on the chain after straightening.
The up-down moving device comprises a mounting seat for mounting the electrostatic spray guns and a screw rod lifter, the mounting seat is fixed on the screw rod lifter to move up and down, the two groups of electrostatic spray guns are respectively a first group of electrostatic spray guns 21 and a second group of electrostatic spray guns 22, the two groups of electrostatic spray guns are sequentially and parallelly located in the material spraying area 02 and are aligned to a workpiece, the moving speed of the electrostatic spray guns is 6m/min, the initial positions of the electrostatic spray guns are higher than the uppermost end of the workpiece, the electrostatic spray guns move to the lowest positions and are lower than the lowest end of the workpiece, and the spraying width of the electrostatic spray guns is larger than the width of the workpiece.
The device also comprises a controller, a sensor is arranged at the position of the feeding area of the rack corresponding to the rotary clamping cylinder 14, when a workpiece is sleeved on the rotary clamping cylinder 14, a chuck 002 of the rotary clamping cylinder 14 is expanded to clamp the workpiece from the interior of the hollow pipe, and when the workpiece is discharged, a corresponding button of the rotary clamping cylinder 14 is pressed down to loosen the chuck and take down the workpiece.
The device is in a circulating runway shape and sequentially comprises a feeding area 01, a material spraying area 02, an oven area 03 and a blanking area 04 which are connected end to end, wherein a motor drives a chain to move circularly and at intervals, the interval time is the time when an elevator drives an electrostatic spray gun to descend firstly and then ascend to the initial position, and an operator feeds the workpiece and blanks the workpiece positioned in the blanking area 04 within the interval time.
The working principle is as follows: initially, an operator sequentially places workpieces on the rotary clamping cylinder 14, after induction of corresponding sensors, signals are transmitted to the controller, the controller controls the chucks of the corresponding rotary clamping cylinder 14 to be unfolded towards two sides to abut against the inner wall of the workpiece, so as to clamp the workpieces, the workpieces are sequentially placed, when the rotary clamping cylinder 14 with the workpieces is placed and driven by a chain to move to the position right in front of a first group of electrostatic spray guns, a position sensor is arranged beside the rotary clamping cylinder 14, after normal falling, the position sensor transmits signals to the controller, the first group of electrostatic spray guns are controlled to spray one surface of the workpiece, when the work is carried out at the same time, the elevator drives the electrostatic spray guns to descend at a constant speed first and then ascend, and when the electrostatic spray guns reach the initial position, the elevator stops driving, the controller drives the motor to enable the chain to move continuously, the rotary clamping cylinder 14 is located right in front of the second group of electrostatic spray guns, the position sensor is arranged beside the position of the rotary clamping cylinder 14, after the rotary clamping cylinder is in a normal position, the position sensor transmits a signal to the controller, the controller controls the rotary clamping cylinder 14 to rotate 180 degrees, then the second group of electrostatic spray guns are controlled to spray the reverse side of the workpiece, the workpiece subjected to double-side spraying sequentially enters the drying oven, the dried workpiece is naturally cooled through the cooling area 05, the processed workpiece is located in the blanking area 04 through the motor driving chain, the corresponding cylinder switch is pressed down, the chuck is loosened, manual blanking is carried out, meanwhile, manual feeding is carried out on the cylinder, the reciprocating is carried out, and the workpiece with powder on the part can be manually subjected to additional spraying in the observation area 06.
The above are only typical examples of the present invention, and besides, the present invention may have other embodiments, and all the technical solutions formed by equivalent substitutions or equivalent changes are within the scope of the present invention as claimed.
Claims (5)
1. A powder coating characterized by: the powder coating is prepared from (by weight parts) synthetic superfine aluminum silicate powder 0.1-0.2; 0.1-0.2 part of alumina C; 2-4 parts of anion powder; 0.05-0.08 part of single-layer graphene powder; 0.5-1 part of xenotime powder; 20-30 parts of epoxy resin; 20-30 parts of polyester resin; 3-5 parts of an auxiliary agent; 20-40 parts of calcium carbonate powder; 5-25 parts of pigment, wherein the resistivity of the powder coating is 89-94 omega.m.
2. A powder coating according to claim 1, wherein: the auxiliary agent comprises benzoin, an electrical conduction agent, a coupling agent and a flatting agent.
3. The spraying method for improving the powdering efficiency of the double-faced groove hollow pipe is characterized by comprising the following steps of: the method sequentially comprises the following steps of,
a, placing a workpiece on a rotary clamping cylinder of a transmission device, wherein the transmission device performs transmission at intervals;
b, mounting two groups of electrostatic spray guns on the two groups of up-down moving devices respectively, wherein the horizontal distance between the workpiece and the electrostatic spray guns is 15-20cm;
c, spraying the powder coating material of claim 1 or 2 on the workpiece by a first group of electrostatic spray guns up and down;
d, the transmission device transmits once, the rotary clamping cylinder rotates 180 degrees, and the second group of electrostatic spray guns aim the powder coating of claim 1 or 2 at the workpiece for up-and-down spraying;
e, the sprayed workpiece enters an oven for curing;
and f, cooling and taking out the workpiece.
4. The spraying method for improving the powdering efficiency of the double-faced grooved hollow tube according to claim 3, wherein the spraying method comprises the following steps: the transmission device comprises a rack, a driving chain wheel, a plurality of driven chain wheels, a transmission chain and a motor, wherein the driving chain wheel is horizontally arranged, the transmission chain is meshed with the driving chain wheel and the driven chain wheels, the motor drives the driving chain wheel to rotate, a plurality of rotary clamping cylinders are uniformly distributed on the chain, the motor is driven at intervals, the transmission device is arranged in a runway shape, the transmission device sequentially comprises a feeding area, a spraying area, a baking box area and a discharging area, and the feeding area is located on a partition wall of the discharging area.
5. The spraying method for improving the powdering efficiency of the double-sided hollow tube according to claim 3, wherein: the up-down moving device comprises a mounting seat for mounting the electrostatic spray guns and a screw rod lifter, the mounting seat is fixed on the screw rod lifter to move up and down, and the two groups of electrostatic spray guns are respectively positioned in the material spraying area in parallel in sequence and are aligned to a workpiece.
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