SU1058635A1 - Apparatus for applying coatings - Google Patents

Abstract

1. DESIGN FOR COATING, containing an electric pulse shaper with a pulse generator, a charge-spray unit with carrier and powder gas supply units and a supporting element, characterized in that, in order to expand the technological capabilities and improve the quality of coatings, it is equipped with command setters Vyksfa technological process, the switch polarity and operational-logic unit, the inputs of which are connected to the setters commands, and to the outputs - the executive elements of the nodes of the gazano the switch and lorsc and the electric field pulse shaper, with the polarity switch being switched on between the electric pulse shaper and the air terminal of the electrical unit. if 4 8 7 1 3

Description

2. The device according to claim 1, characterized in that the operative-logical unit is connected to the polarity switch via a trigger,

3 .. The device in PP. 1 and 2, characterized in that, in order to reduce the idle time, one of the outputs of the operational-technology unit is connected to the input of the pulse generator.

4. Device on PP. 1- - 3, differing from the fact that, in order to ensure the control of the technological process, one of the outputs of the operational-logic block is connected to the display circuit of the electric pulse impulse field.

5. Device on PP. 1 to 4, differing in that the operationally logical block contains a control logic, a timer with a synchronization clock generator k connected to its inputs, and a command generator, the logic control circuit of the inputs to the process selection commands and the syn generator. . synchronizing cycles, and outputs with a sampling circuit, a timer, a command generator and a generator of it. pulses of an electric pulse field former, a-output of the timer is connected with a generator of synchronization x takh shaper and commands, whose output is connected via a trigger; polarity switch and polarity indication scheme.

6. The device according to claim 5, characterized in that the controllers of the duration of the technological process operations are connected to the inputs of the sampling circuit.

7. The device according to paragraphs. 1/2 and 5, characterized in that,

in order to increase reliability, the polarity switch is mounted on a charging dispensing unit.

8. The device according to claim 4, characterized in that the indicators

Polarities are mounted on a charging unit. 9. The device according to claim 4, that is, with the fact that the polarity indicators are mounted on the supporting element.

10. The device according to claim 6, about tl and which is so that the knobs of the duration of the operations of the technological process are mounted on a supporting element ..

one

This invention relates to electrostatic and / or eleitrop pulsed coating.

A device for coating is known, including an atomizer 5 of electrically charged particles and a source of high voltage (IVN), a feature of which is the presence of a coconutator that periodically switches the polarity of a voltage 10 times a generator of charged particles 1.,

However, the lack of synchronization of switching of polarity with other operations of the process leads to deterioration of the quality of the coating, the inability to establish different deposition durations separated polarity, reduces technological capabilities, and the presence of IVN with a midpoint makes working with the device inconvenient and dangerous:

The closest in technical essence and the achieved result to the invention is a coater, containing | electric pulse shaper 1 field with pulse generator, charge d-1

No-spray unit with gas supply units for a-carrier and powder and support element 2.

A disadvantage of the known device i is its applicability only for the unipolar mode of application of patches, which ultimately affects their quality.

The described devices cannot be rearranged from one type of process to another, and their positive qualities cannot be combined in one device, which allows the selection of the type of technological process of both electrostatic and electric pulse coating, and actively control its design.

The purpose of the invention is to expand the technological capabilities and improve the quality of the coating.

The goal is achieved by the fact that a device comprising an electric pulse field former with a pulse generator, a charge-spraying unit with carrier gas and powder supply units and under; holding element, equipped with a set; ticks of technological selection teams; The processors switch the polarity and the operational logic unit to the inputs of which the control commands are connected, and to the output the actuating elements of the gas carrier and powder supply units and the electric pulse shaper are connected between the electric pulse shaper and the charging input spray block. Operational-logic unit is connected to the polarity switch over the trigger. In addition, in order to shorten the idle time, one of the outputs of the operational logic block I is connected to the input of the pulse generator. In order to control the technological process, the polarity indication circuit of the electric pulse field is connected to one of the outputs of the operational logic block. The Operational-Logic block contains the control logic, a timer with a sampling circuit and a clock generator and a command generator connected to its inputs, the logic control circuit of the inputs associated with the process selector and the clock generator, and outputs with the sampling circuit Timer 1, the command driver and the pulse generator of the electric pulse field former, and the timer output is connected to the sync generator and the driver Andes, output to trigger .soedinen torogo through a polarity switch and circuit indikatsii.pol polarity. At the same time, a set of the duration of technological operations is connected to the inputs of the sampling circuit. In addition, in order to increase reliability, the polarity switch and the polarity indicator are mounted on a charge-spray unit. The polarity indicators and setting knobs for the duration of the technological operations are mounted on a supporting element. FIG. 1 shows the device / general view; FIG. 2 is a view A of FIG. one; in fig. 3 is a view B of FIG. I in FIG. 4 is a block diagram of the device in FIG. 5 - the same with the polarity switch (PP) of the vacuum relays; in fig. A variant of the technological scheme with the placement of the control scheme in the spraying device in g. 7 — time diagrams for the unipolar process with the negative polarity of the electropulse field (SPTA) for the Pi mode (portable device, manual mode); in fig. 8 - the same for mode P2 (stationary device, manual mode); in fig. 9 is a time diagram of a unipolar process with positive polarity of spare parts, Plf mode in FIG. 10 - the same for mode P2; in fig. 11 is a timing diagram of a bipolar process, for Pi mode; in fig. 12 - the same: for mode P2; In the diagramAx1x indicated: tj | the delay time of the powder supply command (PPC), which is hard-programmable by the hardware and ensures uniform supply of the applied material; tj is the removal time of the remainder of the coating material from the charge-distribution unit (ZRB) set by the setting device 23; t is the duration of the operating output (during this time the particles, not axially on the product to be coated, are derived from the gap RB-product) - the time required for reloading the rest of the particles in the ZRB, set by the setting unit 24; t4 - time of passive work - provides a pulsed mode of supplying the coating material and the ability to control its consumption, is set by the setting device 25; tn and tp are the time of active work (time of effective coating), respectively, with SPD of negative and positive polarity (can be arbitrary and chosen by the operator) ; t4 -. the time of interruption of the execution of the command of the TOR, if t, TO, the command to deliver the carrier gas (CPGN) is not interrupted, which permits the production. the exact dosage of the sprayed material in the coating area, and the time t is masked; t pause time (off time) can be arbitrary. The device contains (Fig. 1) hours, a tube 1 of insulating material with an inlet pipe 2 at one end and a spray gun 3 at the other, around which a system of pulse transformers (IT) on ring cores 4 or cable IT 5 is mounted, the secondary terminals The windings of which are connected to the corona electrodes b. A protective shield is installed around IT. 7. After filling the tube of the STEMPING part of the device, comp. Ond get ZRB 8, which is mounted on the handle 9 or other supporting element, containing the main structural elements - the block; power supply (PS), electronic circuits, switching elements and other necessary parts and components. To the ZRB 8 input - to the terminals of the primary windings of IT - connected through a PC, a shaper of 10 charge pulses, spare parts, connected to the output of an Ipra pulse (GI) 11, which has, at its input, a control circuit of the SU 12. Button 1 of PP 14 and button 15 serve for giving Commands Turn on driver (ICF) and Change polarity (PCB). The device is equipped with indicators 16 and 17 (for example, LEDs with different luminescence) of positive and negative polarity. In the handle 9 (or outside it) there is a power supply unit (PSU) 18 and an operational logic unit (ARS) 19, which is based on the logic control circuit (LSU) 20, timer 21, sampling circuit (CB) 22 (with controllers ... t4-23 ... 25 mounted on the handle panel 26), clock generator (FCT) 27 I1FC) 28. The outputs of the command driver (FC) 28 are associated with the trigger 29, PP 14, floor indication circuit (CIP) 30 (it is also the control circuit - IC in FIG. 6), as well as the execution nodes 31 - 33 of the command control module of the ZRB driver (КУФ ЭРВ), supply of a psiyika (KPP) and carrier gas (KPGN), through PP 14 to the inlet of the RRT, a damping circuit is connected, consisting of 3 diodes 34 and resistor 35, a function of switches. elements of switch 14 can perform, for example, evacuated relays 36 and 37, the inputs of which are connected to the outputs of trigger 29. The regulation of times tpt and during operation in automatic mode (Auto) is performed using setters 38 and 39, changing parameters of spare parts regulator 40 / a mode change from manual Pi to manual P2 or in the AVT mode selector switch (PRR) 41.. Pi mode differs from the mode. P2 only in the presence of the operation Output that does not execute at t 0. In these modes, all types of operations are performed in manual control (Fig. 7-12), and the times tj and tp are chosen by the operator and can be arbitrary and the times Chr | d and tp, 2A are masked. In Auto mode, all operations of the selected technical process are performed automatically, with the start of execution on the command to turn on the former (ICF), and the interruption or end of execution is performed by the command VKF (inversion ACF), the command for changing polarity (PCB) in this mode The function is corrected, which allows you to actively influence the course of the process. When t, pu t) j "O (forbidden state), Auto mode on the command VcF Not executed. When t, d O or t.i | il5d; 0; tpJd f о performs work in unipolar mode with negative or positive polarity of spare parts, respectively, and for piJi О, in bipolar mode. All OLV teams are presented in three forms. 1. The commands VKF 13 and CSR 15 are similar to the Start command, they are external and are configured by drivers directly from the device; or transmitted via communication channels for automatic control in the case of autonomous operation. By these commands, the hardware of the device is enabled to implement the selected process algorithm. In the absence of: the FCC commands are executed only by the FSC (which allows you to select the initial polarity values of the SPVA in all operating modes), and the direct condition for its performance is the FPC, and all other operations are not executed. The command of the control panel is executed automatically in the P2 modes (at t 0) and Auto (respectively at t 0; tp. Commands of CPGN, KPP 0; tpfA tp control external devices of the process. 2. Commands of KPGN, KPP, trigger polarity ( TP), TP, control CI (IGI), ICP, general reset (CIA) and KUF ZRB are the main internal and are used to switch the hardware to the execution of the process, the sequence of operations is performed by selecting the appropriate subprograms of its implementation depending from the state of the commands VkF, KSP, and also modes P1 2.Avt and time settings tj - t (23 - 25}, and Tel (38 ..). The TP command is executed at time tj (Output operations) after the PCB if there is an ACF command, and in the case of the ACF, immediately after the PCB t masks. Z. All other commands are service and control directly the execution of the corresponding subroutines through the implementation of a set of micro-operations: Reading the process time scheduler (the command т t t), Timer recording of the time of the corresponding operation (command Zn t), the command Control scheme sampling, timer control, LSU control, FC control, etc. The devices allow to realize six basic types of technological process in manual modes Pi and P2 and three in automatic mode Auto, which are executed according to the corresponding algorithms programmed with the help of hardware. At the same time, setting the operation time by controllers on the panel 26, equal to. Zero, is similar to its absence in the process, as a result of which the LSU 20 analyzes the state of timer 21 after the operation code has been written in it and skips it when analyzing the zero state. This allows you to change the look of the process if necessary.

The device operates as follows (mode P1).

After the power is turned on by button 42 (BCP command), the RSD command (normalization command) is generated in LSU 20, leading all hardware to the initial state / trigger 29 is set to 1 (operation with a negative polarity of spare parts), and appropriate indication of the EIT sign. With the help of the setting command of the ICF button 13 in the LIS, synchronized ACF and CNGN commands are formed, as a result of which the executive node (IUPG-N) 32 is triggered in the carrier gas supply unit (PGN), for example, an electromagnet that turns on the gas supply is used The carrier is in the coating area, and at the same time the generator 11 is turned on with the pulse shaper 10, and electrical impulses begin to arrive in the ZRB 8, which, after being transformed into IT, are fed to the matching electrodes, creating ika bulk charge whose density is determined by the pulse repetition rate can be adjusted and EIT regulator 12 in accordance with. the requirements of the coating process.

The gun feed is carried out after supplying the carrier gas through time t, which is read by circuit 22 (command TH-t) using service microcommands, recorded in digital / for example, 5-bit code into timer 21, the operation time of which is determined by the value recorded in It has a stroke and a clock sequence by which the operation time code is subtracted from the timer. When the timer reaches the state when it contains only zeros, the command ends the timer operation (SCL) in the LSU 20, FC 28, which form the command of the PPC, under the action of which in the dispenser-feeder the piston (DPP) (Fig, 6) triggered, an actuating unit (e.g., an electromagnet) (FID) 33, including the supply of powdered material, which, when passing through the ZRB channel 8, is charged and settles on the product being covered — the active cycle tp is applied, which is determined in each conc). In this case, by the operator, For example, visually.

After the end of the application cycle by pressing the button 13, the ACF sync-command is formed, the powder supply is interrupted, the command and the IDF 33 are turned off, and the execution unit

IUPGN 32 remains on for the time t4, which allows cleaning the PFR 8 from porous particles, preparing it for a new coating cycle and eliminating uneven powder supply due to its excessive accumulation,

Turning off the CCF command interrupts the execution of the PPC command, turns on the generator of service microinstructions LSU,

5 -Which, using the sampling scheme, remove the value of t, write down its IB timer, read it, after which commands are sent to LSU 20 and FC 28 to terminate the process - commands to deactivate the ZRB, KPGN, etc., while the trigger TP of its 29 state does not change and is memory previous status of EAS ZRB.

So at the end of time

- t EIT driver is turned off (KUF), the coating cycle ends (time diagram tj,) / but all nodes in the process line wait for the ACF and BCP command to repeat - end of work,

0 To implement the P2 mode, intended for stationary use of the device, at the end of the time t 4, the command of the PSC, TP 29 and PP 14 change their state to the opposite. In this case, for the time t EIT ZRB 8 changes the sign, and in the LSU a pulse generator control command (IGO) is formed, with the help of which the EIT parameters,

0 (for example, the repetition frequency, the mouth (they are charged in such a way as to reduce the duration of the operation Output, i.e. to obtain the minimum t.

After the timer expires (by counting t), the LSU forms the PCB, TP, and PP 14 to transfer the parameters of the ZRB field to the initial state.

To realize the two-pole coating process, after.

50 of working out the described mode P1, a command of the PSC 15 is used to change the polarity of the EIT from negative to positive. In this case, the checkpoint is interrupted, and the timer zapysyvaet55 with the value of tj, at the end of which the command is sent to the TP, which changes its state to the opposite and at the same time interrupts the action of the command of CPGN, Pos.

60 at the change of the EIT polarity, the value tj is written to the timer, for the time of which the GU 11 outputs pulses with the maximum frequency to the driver 10 with the help of the UGO command.

e: follow up. At the end of t, CPGN is turned on, and through t, the CPP team is applied and the coating is carried out as described, but with a different polarity of the particles of the deposited material. On. the polarity switching time of the RFP, for example, 1 - 3 ms, the driver is turned off by the command of the KUF ZRB, which eliminates undesirable transients in the ZRV, increases the reliability of the PP 14 and the device as a whole. The described sequence of operations eliminates the possibility of aggregation of particles in the ZRB and the gap between it AND noKE "biBaeh4JM product, synchronizes the work of all elements, allowing (to obtain high-quality coatings.: Further, after repeated application cycles, each PCB team performs similarly according to the general algorithm, the type of which can be changed by excluding one or another operation from their sequence. A characteristic feature of the two pore mode is the existence of a minimum value of the time of the PSC command, which k follows from the diagrams, cannot be less than i-ss y + d. If tc t + t, the CS command is not executed, and the device continues to work out the algorithm by agreeing with the previous CS command, until its execution condition is fulfilled. described operation of the device in automatic operation, it is necessary to switch the operation mode switch 41 to the A position and set the preset value of the active coating time predetermined from the conditions of the Technical Process optimization, for example, by the method of experimental timekeeping . When tp, d p о o, O, work is carried out in a unipolar technological process with a negative polarity of spare parts, and when PiA ° P2D n O has a positive polarity, and giving an ICF command leads to automatic development of one cycle, respectively active time tp | d or, which is repeated, if the device is switched to interrupt mode by the ECF command. .We set the settings 38 and 39 for the time tp O flK of the RI, when the device is given the command VKF, the device automatically (first it records the timer and tp is replayed and then) processes the process operations in accordance with the diagram in Fig. 11: In the Auto mode, also In the manual modes P1 and P2, at tt, the CAT command is interrupted without interrupting the CPGN command. In this case, the timer counting the time tn is set to the initial state after the termination of the ICF (the minimum interruption time is determined by the GTS 27 and is, for example, 0.25 s) and the LSU remembers the previous state of the process and continues to work when the Wcf command is given. The PSC command in this mode is corrective when the minimum follow time condition is fulfilled, and the correction basically determines the possibility of changing the state of the IPP to the opposite, while the execution of the previous operation is ignored and the device starts a new cycle according to the operation algorithm. The invention substantially loosens the technological capabilities of the coating process, makes it more versatile, as it allows you to quickly select, modify and adjust its course. The possibility of settling 51 times of duration of operations, their omission, work with controlled interruption of operations, the use of masking techniques makes the process flexible and convenient in practice, allows you to effectively spend the material of coatings, improves performance. Bp The ability to dynamically adjust the process in the Auto mode, EIP polarity state memory, control of spare parts parameters depending on the type of operation and the range of materials of the coating material, partial process control using polarity cxeNH indication of spare parts also extends technological capabilities . Work in manual and automatic modes, full autonomy in portable or stationary use with the ability to remotely control nq communication channels, allows you to organize almost any kind of existing process technology while ensuring their maximum possible noise immunity. Placement of a two-pole source of spare parts, and ZRB noBbBuaejr reliability and safety of operation with the device. Improving the quality of coating syr A common algorithm for implementing a two-polar coating process using a two-polar source of spare parts (with a short re-switching time) eliminates the aggregation of particles in front and rear coated product. The ability to choose the times of active coating in the Av mode with an arbitrary allows you to optimize the coating process according to the quality of the coating.

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Claims (10)

1. APPLICATION DEVICE COATINGS, comprising an electric pulse shaper with a pulse generator, a charging and spraying unit with carrier gas and powder gas supply units and a supporting element, characterized in that, in order to expand technological capabilities and improve the quality of coatings, it is equipped with process controllers, a switch polarity and the operational-logical unit, to the inputs of which the command initiators are connected, and to the outputs are the executive elements of the gas carrier and powder supply units and formations an electric pulse field generator, the polarity switch being connected between the electric pulse generator and the input of the charge-spraying unit. 7 6/4 8 7? j 2. The device according to π. 1, about t l and - | characterized in that the operational logic unit is connected to the polarity switch via a trigger. 3 .. The device according to paragraphs. 1 and 2, characterized in that, in order to reduce the idling time, one of the outputs of the operation unit is connected to the input of the pulse generator. 4. The device according to paragraphs. 1–3, characterized in that, in order to ensure control over the technological process, a circuit for indicating the polarity of the electric pulse field is connected to one of the outputs of the operational logical unit. 5. The device according to paragraphs. 1 - 4, characterized in that the operational-logical unit contains a control logic, a timer with a sampling circuit connected to its inputs! h by a clock generator and a command generator, the logic control circuit of the inputs being connected to the process controllers and a sync and ironic clock generator, and outputs to a sampling circuit, a timer, a command generator and an img generator. pulses of the electric pulse field driver, and the timer output is connected -with a synchronizing generator, hov and command generator, output; which is connected via a trigger to a. ^ polarity switch and a polarity indication circuit. 6. The device according to p. 5, characterized in that to the inputs of the sampling circuit connected switches the duration of operations of the technological process. 7. The device according to paragraphs. 1, 2 and 5, characterized in that, in order to increase reliability, the polarity switch is mounted on the charge-spray unit. : 8. The device pop. 4, excellent I. The result is that the polarity indicators are mounted on the charge-spraying unit. 9. The device according to p. 4, characterized in that the polarity indicators are mounted on a supporting element. 10. The device according to p. 6, characterized in that the settings of the duration of the operations of the technological process are mounted on a supporting element. nano-spraying unit with gas supply units for a carrier and powder and a supporting element [2j. A disadvantage of the known device 5 | is its applicability only for! Unipolar coating application, which ultimately affects their quality. The devices described cannot