Aluminum profile vertical powder coating production line process

powder coating is a dry surface processing procedure, extremely fine pigment particles through static treatment, sprayed on the product to form a coating, after curing furnace to form a solid coatingbecause of powder coating has:1) surface beautiful, durable, anti-scratch flower, anti-chemical invasion, anti-ultraviolet,2) environmental protection, no waste liquid discharge,3) perfect corner coverage effect,4) uniform color, wide range of spray colors,5) thickness easy to control so widely usedpowder coatings and coatings began in the late 1930sThe initial flame spray method was applied to the metal surface in a molten state, which is the beginning of powder sprayingUntil the 1950s, when Germany invented the vulcanized bed immersion method of powder, powder coating and coating process has been greatly developedChina's powder coating started late, in 1989, Changzhou Huayi aluminum profile factory in Jiangsu Province introduced the United States Norson powder coating equipment, is China's aluminum profile powder coating first, but with the economic reform and opening up, powder coating technology in China has been rapid developmentEarly use of horizontal production lines, but with the development of economic and technological development, Italy, Japan first launched vertical spraying production lines and began to be widely usedVertical powder coating production line has developed into a mature product, from the previous treatment of the branding, drying to powder coating uniformity, as well as the effect of curing are to achieve the advanced level abroad, due to the vertical line covers a small area, operation of less personnel, powder uniformity, curing layer have achieved perfect resultsii, vertical powder spray production line process
vertical powder spray production line of the process group set up powder spray production line mainly by the front treatment, loading and unloading delivery system, powder ingesting system, powder recovery system, curing drying part and automatic control partsthe main process of its work is divided into: front treatment, upper frame, spraying, curing, unloading, packaging1) The front external pretreatment is mainly to clean the stains on the surface of the aluminum profile, and to form a layer of chrome film on the surface, for the powder to do a good job of pre-work process: loading baskets, degreases, washing, washing, washing, water washing, table tone (middle and middle) , washing, chromic, water washing, hot (pure) water washing, drip drying, drying, spraying on the shelf among them: degreasing, alkali erosion, table tone, chromium agent concentration is based on the concentration of the supply manufacturer provided by the tank liquid Wash tanks with general tap water Hot water is washed with pure water (alkali erosion can not be used) tank structure: degreasing tank: mainly for cleaning aluminum profile surface stains, to prevent aluminum surface oil, such as the adsorption of static powder The tank anti-corrosion using soft PVC, the main component of the tank liquid is sulfuric acid, the temperature is room temperature can be The size of the groove body depends on the length and yield of the largest material washing tank: cleaning the chemical residue of the last process tank The tank anti-corrosion using soft PVC, the main component of the tank liquid is tap water, the temperature is room temperature can be The size of the groove body depends on the length and yield of the largest material the surface tuning groove (neutral): neutralising acids that remain in the degreasing tank The tank body anti-corrosion using soft PVC, the main component of the tank fluid is 10 degrees to 60 degrees The size of the groove body depends on the length and yield of the largest material chromium groove: chemical transformation, to prevent adsorption of electrostatic powder off, chromium and phosphating two, these two methods have been used for many years, the performance is quite stable, easy to operate on the production, according to its treatment after the color to identify the transformation effect, wherealized film yellow, phosphorus chromium membrane display Green, the operating temperature and time range of these two processes is wider, the coating thickness is generally 0.3 to 0.8g/M2 Chromium tank corrosion protection using soft PVC, the main component of the tank liquid is fluoride or fluoritate, the temperature is 25 degrees to 55 degrees The size of the groove body depends on the length and yield of the largest material hot water washing tank: chromium treatment process, its anti-corrosion using a full stainless steel structure, tank fluid composition for pure tank temperature control of 60-80 degrees drying furnace: the chromium film after chromium is dried, so that the surface does not residual moisture, if the surface of the workpiece left moisture into the powdering process, the coating will produce bubble defects Drying temperature should not be too high or it will cause the transformation of the membrane too much loss of crystalline water and transformation, resulting in loose film and the coating adhesion decreased The heating of the drying furnace can be based on the need for different customers to use a gas burner or a diesel burner The temperature control through the temperature control system allows the target temperature to be set The furnace body is made of stainless steel 2) The loading and unloading transport system consists of two parts: chain transport and upper material conveyor belt, which plays a bridging role in the whole system, and its three conveyor belts are kept in sync when it is automatically run The chain conveyor belt is an electromagnetic tuning device, the upper and lower material conveyor belt is the same as the control of a converter, and the synchronous adjustment is carried out after sampling the feedback signal of the rotary encoder the main role of the loading conveyor belt is to form a smooth transition from vertical to horizontal when loading the aluminum profile is from horizontal to vertical, and from vertical to horizontal when feeding To prevent aluminum swinging, surface scraping It is 40 degrees angle with the conveyor chain, and its up and down materialand and the speed of the transport chain are carefully calculated by the PLC to ensure that the three are synchronized in space Main composition: by a motor to drive the belt operation, conveyor belt is equipped with anti-slip bezel, to ensure that aluminum has a smooth and smooth ground landing frame the transport chain by a million-way conveyor chain to drive aluminum profile to the designated rail movement, the entire chain length of 100 to 150 meters, can withstand high temperature Its operating speed is related to the number of spray guns and the thickness of spray powder, in general, a single side of twelve spray guns, the transmission chain operating speed of 1.5 to 2 m/min 3) The powder injection system is the core part of the whole production line: mainly composed of two lower and lower stop adjustable, adjustable speed reciprocating machine and powder injection system reciprocating machine: its height by the customer sprayed the maximum profile length, the spray gun is installed on the reciprocating mobile platform, the mobile platform according to the straight rail for the up-and-down reciprocating movement The schematic is shown Its up and down stop adjustment is fed back to the PLC by the encoder to calculate pulse positioning, the adjustment accuracy of 1mm its upper and lower stop position can be set by the touch screen or the upper machine Its operating speed is adjusted from the potentiometer input to the inverter, the speed adjustment range is 0HZ to 50HZ (0m/s to 8m/s), according to the customer's need for the powder thickness of the actual on-site adjustment high-voltage electrostatic gun and universal gun controller: imported Swiss Jinma automatic high-voltage electrostatic spray gun equipped with integrated electrostatic high-pressure generator is the core of powder spraying equipment It is the most critical component for spraying powder onto the workpiece Daily maintenance is very small, and equipped with electrode seat discharge needle cleaning system, can ensure a stable and efficient powder charging effect and continuous and stable powder output Swiss Golden Horse automatic high-voltage electrostatic spray gun Kimma Universal gun controller provides a user-friendly user interface, can achieve repeated settingof of control parameters, resulting in excellent spraying results the advantage of the controller is that all spray parameters (spray voltage, spray current, transmission air and electrode seat cleaning air) can be accurately set at all times all spray parameters (spray voltage, spray current, transmission air and electrode seat cleaning air) can be precisely set the constant powder charging conditions
the uniform powdering of all spray guns
uniform coating surface achieve accurate control of the coating surface thickness, thus achieving the purpose of saving powder, 255 spray individual procedures can be stored in the controller at any time universal gun controller, in combination with the optional OptiFlow, enables the measurement and adjustment of transmitted and auxiliary air The DigitalBus data bus module enables data exchange with a remote programmable controller (PLC) The role of the cyclone recovery device is to separate the recovered powder that is transmitted into the air The air powder mixture drawn from the spray room is fed into the cyclone separator The mixture forms a rotating air flow down, and the heavier powder particles are centrifugated onto the wall of the cyclone separator and then falling onto the lower powder sieve On the powder sieve, impurities are sieved out and the qualified powder re-enters the powder circuit for continued use This cyclone separator is more suitable for the use of rapid color change spray 4) Curing furnace workpieces must enter the oven as soon as possible after spraying to level, curing to prevent dust and other impurities adhesion and powder and affect the quality of the coating The curing furnace uses two Swedish Baxter burners to heat up, the use of natural gas (or liquefied petroleum gas) as fuel, with an annual output of 15,000 tons, the largest material length of 7.5 meters vertical production line as an example: its curing furnace internal space design for 200m3 heating speed: normal temperature to 180 degrees C about 15 to 20 minutes There are four temperature sampling points, can monitor the temperature in the furnace at any time, can also be with the upper communication curve analysis, report records for the record, each two temperature control points control a combustion machine, to ensure uniform temperature in the furnace The wind curtain is set at the entrance and exit of the furnace body to ensure that the heat in the furnace is lost 5) Automatic vertical powder production line control part of the automatic vertical powder is mainly composed of: front treatment, conveying system, powder injection system, curing furnace several parts The use of PLC intelligent control, and with the touch screen for online monitoring and operation, as well as the upper computer system for online remote, in-place monitoring, data acquisition analysis, curve archiving, report generation Another spray gun controller can be selected according to customer requirements can be used to add a new upper computer to monitor the operation the whole line control system diagram to deal with the aluminum profile surface moisture drying, to provide hot water By a combustion machine with a temperature controller to control the temperature in the drying furnace, can monitor the tank fluid temperature, the collected temperature can be archived on the upper machine the of the conveyor system consists of two parts: chain transport, loading and down conveyor belt, which plays a bridging role in the whole system, and its three conveyor belts are synchronized when it is automatically run The chain conveyor belt is an electromagnetic tuning device, the upper and lower material conveyor belt is the same as the control of a converter, and the synchronous adjustment is carried out after sampling the feedback signal of the rotary encoder The belt operating line speed can be displayed on the touch screen or on the hoist, and the main conveyor belt is adjusted by the electromagnetic governor powder injection system is the core part of the whole production line, composed of two down-to-the-counter reciprocating machines, its operating speed, up and down stop position may be over the field operation of the potentiometer to adjust Through PLC operation, the rotary encoder is used as the upper and lower stop position feedback, and the operator is used to carry out the operation process With upper and lower limits, overload and other protection curing furnace for post-treatment, by two combustion machines for in-oven temperature heating, through the sampling of four temperature control points to control the temperature in the furnace, thermostat can communicate with the PLC, the temperature can be set on the thermostat can be set At the set temperature, the sprayed material is cured and leveled , overview vertical powder coating production line because of its various advantages in China has been recognized by many manufacturers