Working method for three-chamber application pump for powder coating

Abstract

The present invention relates to a powder paint application pump comprising three suction-pressure chambers (EB1, EB2, EB3) to be used in thermoset / thermoplastic / enamel powder paint coating processes. In addition to having a regular paint flow, the invention also allows precise control of the powder paint. Although the three suction-pressure chambers (EB1, EB2 and EB3) in the invention operate with the same working period (WT), the beginnings of these periods are different from each other. When the first suction-pressure chamber (EB1) starts operating at time T=0, the second suction-pressure chamber (EB2) starts operating after one-third of the operating time (WT) (T=WT / 3), and the third suction-pressure chamber (EB3) starts operating after two-thirds of the work time (WT) (T=2*WT / 3).

Description

[0001] WORKING METHOD FOR THREE-CHAMBER APPLICATION PUMP FOR POWDER COATING

[0002] Field of the Invention

[0003] The present invention relates to the working method of a powder paint pump comprising three suction-pressure chambers to be used in thermoset / thermoplastic / enamel powder paint coating processes.

[0004] State of the Art

[0005] When the studies in the sector are examined, it is generally seen that powder paint injectors based on the venturi principle and powder paint pumps based on the suction-pressure principle ensure that the powder paint is sucked from a reservoir and sent to the powder paint gun, thus applying powder paint to the workpiece.

[0006] Injectors based on the venturi principle provide a more regular paint flow compared to pumps based on the suction-pressure principle and are frequently used in the industry due to their affordable cost. Although pumps based on the suction-pressure principle do not create as regular a flow as powder paint injectors due to the phase-by-phase delivery of the powder paint, the inadequacy of powder paint injectors at high flow rates has opened up an area of use for powder paint pumps.

[0007] The traditional method for spraying powder paint from a gun is the injector structure, which works on the venturi principle. The function of sending the powder paint from a reservoir to the powder paint gun is provided by a part called the injector, which works on the principle of its structure. Publication numbered EP0178120 (B1 ) relates to these injectors. These structures, which are used to send the paint from a reservoir to the powder paint gun and work with the venturi principle, have disadvantages such as not being able to provide a solution for sending paint at high flow rates to the powder coating gun, consuming too much air, not being self-cleaning, and difficulty in paint / air control.

[0008] In the publication numbered EP1551558A1 , which was encountered in the literature research, there are two dust carrying chambers, these chambers are positioned parallel to each other and the compression valves are arranged in a mechanically working structure. Directional controls are provided by the mechanically crushed or opened structure. This technique includes a filter pipe. This pipe is a structure that is only permeable to air. The structure is planned to operate by filling the powder paint into the filter volume and sending it as desired. Also known are publications US2001 / 0003568 A1 and EP1752399A1 regarding the state of the art

[0009] The publication numbered EP2311573B1 , which was encountered in the literature research, has two dust transport chambers; these chambers are positioned parallel to each other and are arranged with air-controlled compression valves. According to the working method explained in the publication, it is formed sequentially in a way that one chamber is suctioning while the other chamber is pressing. Since this method does not contain an intermediate phase, it causes paint spillage that disrupts continuity in low flow paint application demands.

[0010] The publication numbered US10604360 B2, encountered in the literature research relates to a powder paint pump in which a single chamber performs suction and pressure, and the second chamber connected in series to this chamber does not perform suction. In the working method shown in this publication, the dye is sent phase by phase, one full and one empty. This working method not only causes the powder paint flow rate to be low, but also causes the paint coming out of the gun tip to be irregular due to the empty phases. Publications EP3302819 and EP3585522 are also known regarding the state of the art

[0011] As a result, there is a need for a new application pump and a suitable working method that surpasses the known state of the art and eliminates its disadvantages for use in the powder paint process.

[0012] Brief Description of the Invention

[0013] The present invention is the working method for an application pump that surpasses the known state of the art, eliminates its disadvantages, and additionally includes extra advantages for use in the powder paint coating process.

[0014] The present invention relates to the working method of a pump used to send thermoset / thermoplastic / enamel powder paint from a reservoir to a powder paint gun or another reservoir. It works precisely and quickly to ensure that the thermoset / thermoplastic / enamel powder paint is sprayed evenly from the powder paint gun. Here, the powder coating gun can be a hand-held structure that sprays thermoset / thermoplastic / enamel powder paint to powder coat a workpiece, or a structure capable of automatic painting.

[0015] The invention uses a powder paint pump with three suction-pressure chambers, each suction-pressure chamber being operated in a specific phase order. Thus provides a solution to the irregular flow problem caused by the phase-phase operation of powder paint pumps, as it has a structure that provides continuity in the suction and pressure process. In addition to having a regular paint flow, the invention also allows precise control of the powder paint.

[0016] Description of the Figures: The present invention will be described with reference to the accompanying drawings, thus the characteristics of the invention will be understood clearly. However, the aim of this is not to limit the invention with such certain embodiments. On the contrary, it is aimed to cover all alternatives, amendments and equivalents which may be contained in the field defined by the accompanying claims. It is to be understood that the details shown are only shown for the sake of illustrating the preferred embodiments of the present invention and presented for both illustrating the methods and for providing description of the rules of the invention and the conceptual features of the invention to be easily understood. In these figures;

[0017] Figure - 1 View showing the powder transfer unit with three suction and pressure chambers included in the invention, the powder paint device that provides the air and electrical power required for this pump, the powder coating chamber, the powder coating gun and the workpiece on which the application is made.

[0018] Figure - 2 Graphic view showing the operation of the suction-pressure chambers of the powder paint pump, which is the subject of the invention, in a phase-shifted manner relative to each other.

[0019] Figure- 3 Graphic view showing the positions of the valves during the WT time in the invention. (Figure VT1 , VT2, VT3, VP1 , VP2, VP3, VP4, VP5 and VP6, where “0” means that the relevant elements are not triggered, “1” means that they are triggered.)

[0020] Figure - 4 Detailed cross-sectional view of the powder transfer unit in the pump which is the subject of the invention.

[0021] The figures which enable to clarify this invention are enumerated as mentioned in the attached figure and they are given with their names herein below.

[0022] Part References

[0023] 1. Powder transfer unit 11. Three chamber connecting part

[0024] 111. Three chamber connecting part path

[0025] 12. Compression valve chamber

[0026] 13. Tube filter chamber

[0027] 131. First tube filter

[0028] 132. Second tube filter

[0029] 132. Third tube filter

[0030] 2. Pump body

[0031] T. Time

[0032] D. Delay time

[0033] VA. Vacuum open time

[0034] WT. Work period

[0035] HR. Air regulator

[0036] EB1. First suction-pressure chamber

[0037] EB2. Second suction-pressure chamber

[0038] EB3. Third suction-pressure chamber

[0039] VT1. First transfer valve

[0040] VT2. Second transfer valve

[0041] VT3. Third transfer valve

[0042] VV1. First vacuum valve

[0043] VV2. Second vacuum valve

[0044] VV3. Third vacuum valve

[0045] VP1. First valve pinch

[0046] VP2. Second valve pinch

[0047] VP3. Third valve pinch

[0048] VP4. Fourth valve pinch

[0049] VP5. Fifth valve pinch

[0050] VP6. Sixth valve pinch

[0051] VPUR. Cleaning valve

[0052] VAC1. First vacuum generator

[0053] VAC2. Second vacuum generator

[0054] VAC3. Third vacuum generator P1. First compression valve

[0055] P2. Second compression valve

[0056] P3. Third compression valve

[0057] P4. Fourth compression valve

[0058] P5. Fifth compression valve

[0059] P6. Sixth compression valve

[0060] A1. Main air

[0061] A2. Compression valve air

[0062] A3. Transmission air

[0063] A4. Mixing air

[0064] A5. Gun needle air

[0065] A6. Under-chamber pneumatic line

[0066] IP. Work piece

[0067] H. Chamber

[0068] H1. Powder paint

[0069] H2. Fluidization plate

[0070] H3. Non-permeable part

[0071] H4. Suction pipe

[0072] H5. Transfer pipe

[0073] TB. Powder paint gun

[0074] TB1. Powder paint gun trigger

[0075] 5. Gun signal connection

[0076] 65. Mixer part

[0077] K. Control unit

[0078] K1. Main control board

[0079] K2. Pump driver board

[0080] K3. Pressure compensation tank

[0081] K11. First proportional pressure control valve

[0082] K12. Second proportional pressure control valve

[0083] K13. Third proportional pressure control valve

[0084] VD. Filling valve

[0085] BS. Pressure sensor Description of the Invention:

[0086] In this detailed description, the powder paint application pump which is the subject of the invention is explained with examples which will not create any limiting effect, only for the purpose of a better understanding of the subject.

[0087] Figure 1 shows the view of the pump, which is the subject of the invention, showing the powder transfer unit (1 ), pump body (2), powder paint (H1 ) chamber (H), powder paint gun (TB), work piece (IP) and control unit (K). In Figure 2, the cross-sectional detail view of the powder transfer unit (1) is given. Accordingly, the powder transfer unit (1 ) included in the invention is used to take powder paint (H1) from the chamber (H) and transfer it to the powder paint gun (TB) or another chamber. The pump body (2) included in the invention provides the transmission of main air (A1), compression valve air (A2) and transmission air (A3) to the powder transfer unit (1 ) and the electrical power of the powder transfer unit (1). The chamber (H) is the section that supplies the powder paint (H1 ), and the powder paint gun (TB) is the section that applies the powder paint (H1) to the work piece (IP). In the invention, the control unit (K) controls the valves and electronic equipment.

[0088] In the powder transfer unit (1) of the pump which is the subject of the invention, there are three suction-pressure chambers (EB1 , EB2, EB3), namely the first suction-pressure chamber (EB1 ), the second suction-pressure chamber (EB2), and the third suction-pressure chamber (EB3). Suction-pressure chambers (EB1 , EB2, EB3) perform the suction-pressure function and ensure that the powder paint (H1 ) in the chamber (H) is transferred to the powder paint gun (TB). In this way, the invention not only has a regular paint flow but also allows precise control of the powder paint (H1 ).

[0089] In the invention, the suction-pressure chambers (EB1 , EB2, EB3) are placed inside the tube filters (131 , 132, 133) in the tube filter chamber (13). The tube filters (131 , 132, 133) in the tube filter chamber (13) are preferably connected to each other by a mechanical element (e.g. a bolt) and formed into a single unit. The tube filter chamber (13) is a structure containing a first tube filter (131 ), a second tube filter (132) and a third tube filter (133) in a porous structure that is impermeable to dust and permeable to air. In this way, main air (A1 ) or transmission air (A3) can be supplied into the suction-pressure chambers (EB1 , EB2, EB3) without powder paint (H1) outlet. The tube filters (131 , 132, 133) are arranged in a geometric structure so that the distance between them is preferably the shortest and equal. Tube filters (131 , 132 133) are tube-shaped structures made of a special porous material that is permeable only to air but not to thermoset / thermoplastic / enamel powder paint. Filters keep the thermoset / thermoplastic / enamel powder paint in their internal volumes and do not let it pass to their external volumes. These tube filters (131 , 132, 133) may be a circular cross-section tube or pipe-like structure as shown in the invention (Figure 2), or they may also be in square, rectangular or elliptical cross-section shapes.

[0090] In the invention, each suction-pressure chamber (EB1 , EB2, EB3) performs a cycle and performs its duties during suction and pressure. This is called work time (WT) in milliseconds. The work time (WT) is repeated repeatedly to ensure regular operation of the pump. Although the three suction-pressure chambers (EB1 , EB2 and EB3) in the invention operate with the same working period (WT), the beginnings of these periods are different from each other. As shown in Figure 2 when the first suction-pressure chamber (EB1 ) starts operating at time T=0, the second suction-pressure chamber (EB2) starts operating after one-third of the operating time (WT) (T=WT / 3), and the third suction-pressure chamber (EB3) starts operating after two-thirds of the work time (WT) (T=2*WT / 3). In this way, phase-shifted times relative to each other are obtained. These three sections work in harmony with phase shifting. Thanks to the phase shifted operating method, the pump's operating continuity is ensured due to the suction-pressure chambers (EB1 , EB2, EB3). In the invention, a special pneumatic diagram (Figure - 1 ) prepared inside the pump body (2) is envisaged for increasing the paint flow rate and for precise operation. As will be explained in detail in the claims, selecting directional control valves with external pilots has shortened the reaction times of the directional control valves, enabled them to operate with air from the vacuum generator, and enabled them to operate with variable air pressure and / or negative pressure coming to the valves. This pneumatic diagram is an essential feature for the operation of the application pump for thermoset / thermoplastic / enamel powder coatings, and the precise and rapid operation of the directional control valves ensures high flow and uniform output during powder paint spraying (H1) from the powder coating gun (TB).

[0091] For thermoset / thermoplastic / enamel powder coating, the application pump operates in the two states described below. Which of these situations will be used and the differences between the situations are specified in the claims. It is advantageous because it is equipped to work in different situations and allows the application of different types of powder paint with other features specified in the claims. In addition to these operating states, there is a cleaning state that enables the application pump to clean itself for thermoset / thermoplastic / enamel powder coatings.

[0092] The three-chamber application pump starts operating when the gun trigger (TB1 ) is pressed or the powder control box (K) is set to self-start.

[0093] The pneumatic diagram shown in Figure 1 shows the initial positions of the directional control valves (VT1 , VT2, VT3, VP1 , VP2, VP3, VP4, VP5, VP6, VV1 , W2, VV3, VPLIR). Direction change is achieved by giving electrical signals to the valves.

[0094] In the invention, valve pinches (VP1 , VP2, VP3, VP4, VP5, VP6) are the elements that open and close the compression valves (P1 , P2, P3, P4, P5, P6) by being triggered. For example, by actuating the first valve pinch (VP1), the first pinch valve (P1 ) closes. When not triggered, the first compression valve (P1 ) path is open. In the invention, valve pinches (VP1 , VP2, VP3, VP4, VP5, VP6) and compression valves (P1 , P2, P3, P4, P5, P6) are arranged to match each other as VP2-P2, VP3-P3, VP4-P4, VP5-P5, VP6-P6.

[0095] In the invention, the vacuum valves (W1 , W2, W3) are connected to the vacuum generators (VAC1 , VAC2, VAC3) with the air regulator (HR) in front of them. When the first vacuum valve (W1 ) is not triggered, it does not pass air, so no air is supplied to the first vacuum generator (VAC1 ). When triggered, the air passing over it reaches the first vacuum generator (VAC1). In this way, vacuum power is obtained on the pneumatic line to which the first vacuum generator (VAC1 ) is connected. This situation is arranged in the same way for VV2-VAC2, W3-VAC3.

[0096] In the invention, the transfer valves (VT1 , VT2, VT3) are arranged in a way that they are connected to the vacuum generators (VAC1) when they are not triggered. For example, when the first transfer valve (VT1 ) is not triggered but the first vacuum valve (W1 ) is triggered, the vacuum power created by the first vacuum generator (VAC1) is transferred to the first suction-pressure chamber (EB1) through the line to which the first transfer valve (VT1 ) is connected. Since the first tube filter (131 ) in the first suction-pressure chamber (EB1) is only permeable to air and not to paint, the powder paint (H1 ) can be sucked into the first suction-pressure chamber (EB1 ) with the vacuum power transferred here. This event is carried out when the first compression valve (P1 ) path is closed and the fourth compression valve (P4) path is open. When the path of the fourth compression valve (P4) is closed and the path of the first compression valve (P1 ) is open, the powder paint (H1 ) is transferred from the first suction-pressure chamber (EB1 ) in the direction of the powder paint gun (TB). At this moment, the first transfer valve (VT1 ) is triggered and the powder paint (H1) which was sucked into the first suction-pressure chamber (EB1 ) in the previous phase with the air coming from the delivery air (A3) to which the other end of the valve is connected is sent towards the powder paint gun (TB). In the invention, the second transfer valve (VT2) is arranged in such a way that when it is not triggered, it is connected to the second vacuum generator (VAC2). When the second transfer valve (VT2) is not triggered but the second vacuum valve (W2) is triggered, the vacuum power created by the second vacuum generator (VAC2) is transferred to the second suction-pressure chamber (EB2) through the line to which the second transfer valve (VT2) is connected. Since the second tube filter (132) in the second suction-pressure chamber (EB2) is only permeable to air and not to paint, the powder paint (H1 ) can be sucked into the second suction-pressure chamber (EB2) with the vacuum power transferred here. This event is performed at the moment when the path of the second compression valve (P2) is closed and the path of the fifth compression valve (P5) is open. When the fifth compression valve (P5) is closed and the second compression valve (P2) is open, the powder paint (H1 ) is transferred towards the powder paint gun (TB). At this moment, the second transfer valve (VT2) is triggered and the powder paint (H1), which was sucked into the second suction-pressure chamber (EB2) in the previous phase, is sent towards the powder paint gun with the air coming from the delivery air (A3) to which the other end of the valve is connected.

[0097] In the invention, the third transfer valve (VT3) is arranged in such a way that when it is not triggered, it is connected to the third vacuum generator (VAC3). When the third transfer valve (VT3) is not triggered but the third vacuum valve (W3) is triggered, the vacuum power created by the third vacuum generator (VAC3) is transferred to the third suction-pressure chamber (EB3) through the line to which the third transfer valve (VT3) is connected. Since the third tube filter (133) in the third suction-pressure chamber (EB3) is only permeable to air and not to paint, the powder paint (H1 ) can be sucked into the third suctionpressure chamber (EB3) with the vacuum power transferred here. This event is performed at the moment when the path of the third compression valve (P3) is closed and the path of the sixth compression valve (P6) is open. When the sixth compression valve (P6) is closed and the third compression valve (P3) is open, the powder paint (H1) is transferred to the powder paint gun (TB). At this moment, the third transfer valve (VT3) is triggered and the powder paint (H1) which was sucked into the third suction-pressure chamber (EB3) in the previous phase with the air coming from the delivery air (A3) to which the other end of the valve is connected is sent towards the powder paint gun (TB).

[0098] In the invention, the open times of the first vacuum valve (VV1 ), the second vacuum valve (W2) and the third vacuum valve (W3) determine the amount of paint absorbed (filled) into the suction and pressure chambers (EB1 , EB2, EB3). Vacuum on time (VA) is an expression in milliseconds, set on the control unit (K). In the invention, the delay time (D) and vacuum open time (VA) are arranged in such a way that their totals cannot exceed WT / 2 time.

[0099] In the invention, pressing the powder paint gun trigger (TB1 ) on the powder paint gun (TB) or setting the control unit (K) for automatic operation ensures that the T=0 time operating conditions shown in Figure-2 and Figure-3 are achieved. Releasing the powder paint gun trigger (TB1 ) on the powder coating gun (TB) or stopping it on the control unit (K) means that time T=0 (initial state). Restarting takes place with T=0 conditions.

[0100] In the invention, the operation of the second suction-pressure chamber (EB2) with a WT / 3 phase shift relative to the first suction-pressure chamber (EB1), and the third suction-pressure chamber (EB3) with a 2*WT / 3 phase shift relative to the first suction-pressure chamber (EB1 ), will ensure continuous paint suction and transfer. Phase shifting is done once during the WT period when the system starts operating. Then, the WT period repeats in all suction-pressure chambers (EB1 , EB2, EB3) as shown in Figure 2.

[0101] The operation of the pump will be explained in two main sections: normal operation and cleaning function. Normal operation is examined in three parts.

[0102] Normal operation: FIRST SUCTION-PRESSURE CHAMBER (EB1):

[0103] From time T=0 to time T=WT / 2, the first transfer valve (VT1 ) and the fourth valve pinch (VP4) are not triggered, the first valve pinch (VP1 ) is triggered. Since the fourth valve pinch (VP4) is not triggered and the first valve pinch (VP1) is triggered, the first compression valve (P1 ) is closed and the fourth compression valve (P4) is open. After the time T=0, the first vacuum valve (W1) is triggered after the delay time (D). The first vacuum valve (W1) will remain open for the vacuum open time (VA) and then close. Meanwhile, the powder paint (H1 ) in the suction pipe (H4) is filled into the first suction-pressure chamber (EB1 ).

[0104] From time T=WT / 2 to time T=WT, the first transfer valve (VT1 ) and the fourth valve pinch (VP4) are triggered. The first valve pinch (VP1 ) is not triggered. Since the fourth valve pinch (VP4) is triggered and the first valve pinch (VP1 ) is not triggered, the first pinch valve (P1 ) is open and the fourth pinch valve (P4) is closed. Meanwhile, at T=0 and T=WT / 2, the powder paint (H1) filled in the first suction-pressure chamber (EB1 ) is transferred towards the powder paint gun (TB). Details are shown in Figure - 3. Afterwards, the pump returns to the state at T=0 and operates in successive cycles. In this way, a periodic operating cycle is obtained as shown in Figure - 2.

[0105] SECOND SUCTION-PRESSURE CHAMBER (EB2):

[0106] As seen in the graph in Figure - 2, the operation of the second suction-pressure chamber (EB2) is shifted by T= WT / 3 time compared to the first suctionpressure chamber (EB1 ). As can be seen in Figure 2, time shifting is performed once. As shown in Figure 3, from the moment T=0 to the moment T=WT / 3, the second valve pinch (VP2) is not triggered, the fifth valve pinch (VP5) and the second transfer valve (VT2) are triggered. Since the second valve pinch (VP2) is not triggered and the fifth valve pinch (VP5) is triggered, the second pinch valve (P2) is open and the fifth pinch valve (P5) is closed. After T=WT / 3, the operation of the second suction-pressure chamber (EB2) occurs in a sequential cycle as described below;

[0107] For a period of WT / 2 time,

[0108] The second transfer valve (VT2) and the fifth valve pinch (VP5) are not triggered, the second valve pinch (VP2) is triggered. Since the second valve pinch (VP2) is triggered and the fifth valve pinch (VP5) is not triggered, the second pinch valve (P2) is closed and the fifth pinch valve (P5) is open. After the delay time (D), the second vacuum valve (W2) is triggered. The second vacuum valve (W2) is triggered for the vacuum open time (VA). Meanwhile, the powder paint (H1) in the suction pipe (H4) is filled into the second suctionpressure chamber (EB2).

[0109] Then, for a period of WT / 2 time,

[0110] The second transfer valve (VT2) and the fifth valve pinch (VP5) are triggered, the second valve pinch (VP2) is not triggered. Since the second valve pinch (VP2) is not triggered and the fifth valve pinch (VP5) is triggered, the second pinch valve (P2) is open and the fifth pinch valve (P5) is closed. As shown in Figure-2 and Figure-3, WT continues to operate with its total time remaining constant. Meanwhile, the powder paint (H1) filled in the second suctionpressure chamber (EB2) in the previous phase (WT / 2 time ago) is transferred towards the powder paint gun (TB).

[0111] THIRD SUCTION-PRESSURE CHAMBER (EB3):

[0112] As shown in Figure 3, from the moment T=0 to the moment T=WT / 6, the third transfer valve (VT3) and the sixth valve pinch (VP6) are not triggered, but the third valve pinch (VP3) is triggered. Since the sixth valve pinch (VP6) is not triggered and the third valve pinch (VP3) is triggered, the sixth compression valve (P6) is open and the third compression valve (P3) is closed. From time T= WT / 6 to time T=2*WT / 3, the third transfer valve (VT3) and the sixth valve pinch (VP6) are triggered, the third valve pinch (VP3) is not triggered.

[0113] As seen in the graph in Figure 2, the operation of the third suction-pressure chamber (EB3) is shifted by T=2*WT / 3 time compared to the first suction- pressure chamber (EB1 ). As can be seen in Figure 2, time shifting is performed once.

[0114] After T=2*WT / 3, the operation of the third suction-pressure chamber occurs sequentially as described below;

[0115] For a period of WT / 2 time,

[0116] The third transfer valve (VT3) and the sixth valve pinch (VP6) are not triggered, the third valve pinch (VP3) is triggered. Since the sixth valve pinch (VP6) is not triggered and the third valve pinch (VP3) is triggered, the sixth compression valve (P6) is open and the third compression valve (P3) is closed. After the delay time (D), the third vacuum valve (VV3) is triggered. The third vacuum valve (W3) will be triggered for the vacuum open time (VA). Meanwhile, the powder paint (H1 ) in the suction pipe (H4) is filled into the third suction-pressure chamber (EB3).

[0117] For a period of W / 2 time,

[0118] The third transfer valve (VT3) and the sixth valve pinch (VP6) are triggered, the third valve pinch (VP3) is not triggered. Since the sixth valve pinch (VP6) is triggered and the third valve pinch (VP3) is not triggered, the sixth compression valve (P6) is closed and the third compression valve (P3) is open. Meanwhile, the powder paint (H1) filled in the third suction-pressure chamber (EB3) in the previous phase (WT / 2 time ago) is transferred towards the powder paint gun (TB). As shown in Figure-2 and Figure-3, WT continues to operate with its total time remaining constant.

[0119] Cleaning state:

[0120] In the invention, cleaning can be done from the pump to the paint chamber (H) or from the pump to the powder paint gun (TB) and / or both of these situations together.

[0121] The powder paint pump, which has three chambers, can be cleaned when powder coating is desired to be removed. During this time, a different work will be applied than normal work. When the cleaning operation is activated via the control unit (K) or powder paint gun (TB), it works as follows. In cleaning mode, the first vacuum valve (VV1 ), the second vacuum valve (VV2) and the third vacuum valve (VV3) do not operate (are not triggered).

[0122] Cleaning is carried out from the pump to the chamber by triggering the cleaning valve (VPUR), the first valve pinch (VP1 ), the second valve pinch (VP2), the third valve pinch (VP3), the first transfer valve (VT1 ), the second transfer valve (VT2) and the third transfer valve (VT3). At this time, the first compression valve (P1 ), the second compression valve (P2), the third compression valve (P3) are closed, the fourth compression valve (P4), the fifth compression valve (P5), and the sixth compression valve (P6) are open.

[0123] The cleaning process is carried out from the pump to the powder paint gun (TB) by triggering the cleaning valve (VPUR), the fourth valve pinch (VP4), the fifth valve pinch (VP5) and the sixth valve pinch (VP6), the first transfer valve (VT1 ), the second transfer valve (VT2) and the third transfer valve (VT3). At this time, the first compression valve (P1 ), the second compression valve (P2), the third compression valve (P3) are open, the fourth compression valve (P4), the fifth compression valve (P5), and the sixth compression valve (P6) are closed. These operations can be performed consecutively and / or several times as needed.

[0124] The pump body (2) comprises the pneumatic valves (VT1 , VT2, VT3, VP1 , VP2, VP3, VP4, VP5, VP6, W1 , W2, VV3, VPUR), vacuum generators (VAC1 , VAC2, VAC3), a valve island where the valves are located and the air regulator (HR). The air regulator (HR) is used to regulate the air required by the vacuum generators (VAC1 , VAC2, VAC3).

[0125] Transfer valves (VT1 , VT2, VT3) are externally piloted, three-way two-position (3 / 2) valves. The pneumatic diagram becomes meaningful with the use of these valves. If the pneumatic diagram (Figure 1 ) shows an internally piloted valve instead of an externally piloted directional control valve, that is, a directional control valve that moves the valve core by the force of the inlet air pressure, the application pump for thermoset / thermoplastic / enamel powder coating would not work properly and would even be impossible to operate. Because in internally piloted directional control valves, a portion of the compressed air entering the directional control valve is used for the movement of the valve core. This phenomenon will cause the directional control valves to react differently at different pressures, to be delayed and / or not to work at all if the air pressure is variable. By using externally piloted valves, rapid and regular operation of directional control valves is achieved, providing a great advantage over other structures known in the art. Thanks to these externally piloted directional control valves, the increase in paint flow rate as well as the control of the powder coating is particularly advantageous, with the powder coating being sprayed in a regular, uninterrupted manner from the powder paint gun (TB).

[0126] In the invention, the control of the transmission air (A3), the mixer part pneumatic line (A4), the gun signal connection (5) is done from the screen on the control unit (K). The control unit (K) consists of a main control board (K1 ), a pump driver board (K2), proportional pressure control valves (K11 , K12, K13), a pressure compensation tank (K3) and a filling valve (VD). In the invention, directional control valves (VT1 , VT2, VT3, VP1 , VP2, VP3, VP4, VP5, VP6, VV1 , VV2, VV3, VPLIR) are controlled by the signals created by the pump driver board (K2).

[0127] In the invention, the main control board (K1) controls the proportional pressure control valves (K11 , K12, K12) and ensures that the general air from the main air line (A1 ), the transmission air (A3), the gun needle air (A5), the mixer air (A4) are regulated as desired and their pressures are adjusted.

[0128] In the invention, the transmission air (A3) ensures that the thermoset / thermoplastic / enamel powder paint absorbed into the suctionpressure chambers (EB1 , EB2, EB3) in the previous phase is conveyed towards the powder paint gun (TB) direction by triggering the transfer valves (VT1 , VT2, VT3). In the invention, pneumatic air (A4) is connected to the mixer part (65). The mixer part (65) is connected directly to the powder paint gun (TB) when not in use, or it can be turned off by adjusting it from the control unit (K) if it is not used.

[0129] In the invention, the gun signal connection (5) sends an electrical signal to the powder paint gun (TB) via the main control board (K1 ) in the control unit (K). In addition, the trigger (TB1 ), cleaning and / or other electrical signals coming from the powder paint gun (TB) are transferred to the main control board (K1 ) in the control unit (K) via the gun signal connection (5).

[0130] In the invention, there is a pressure sensor (BS) integrated into the pump driver board (K2) located in the control unit (K). Here, the pressure sensor (BS) is a sensor that converts the analog pressure information it reads into an electrical signal and / or is used for this purpose. The pressure sensor (BS) measures the pressure of the air in the pressure compensation tank (K3) and transfers this pressure value as electrical information to the pump driver board (K2). If this air pressure is lower than the value set in the control unit (K), the filling valve (VD) opens when the pump driver board (K2) generates a trigger signal and remains open until the pressure reaches the preset value measured by the pressure sensor (BS). The filling valve (VD) closes when the desired value is reached. In this way, the air in the pressure compensation tank (K3) is kept at the desired pressure. The air held at the desired pressure in the pressure compensation tank (K3) is used to close the compression valves (P1 , P2, P3, P4, P5, P6) by triggering the valve pinches (VP1 , VP2, VP3, VP4, VP5, VP6) of the pump driver board (K2).

[0131] There are two compression valve chambers (12) in the invention. The first of these is positioned above the tube filter chamber (13) (in the inlet section) and the second is positioned below the tube filter chamber (13) (in the outlet section). The lower compression valve chamber (12) comprises the first compression valve (P1 ), the second compression valve (P2), and the third compression valve (P3), while the upper compression valve chamber (12) comprises the fourth compression valve (P4), the fifth compression valve (P5), and the sixth compression valve (P6). Compression valves (P1 , P2, P3, P4, P5, P6) are responsible for opening and closing the relevant path required for suction and pressure actions to be taken within the suction-pressure chambers (EB1 , EB2, EB3). The compression valve chambers (12) are arranged in such a way that the compression valves (P1 , P2, P3) and (P4, P5, P6) can be installed therein. The chamber (12) containing three compression valves is arranged in a geometric structure so that the distance between the compression valves (P1 , P2, P3, P4, P5, P6) is the shortest and equal. Compression valves (P1 , P2, P3, P4, P5, P6) have a flexible structure, similar to a hose, that closes when pressurized air is applied and returns to its initial position when this air is released. Compression valves (P1 , P2, P3, P4, P5, P6) can be made of a flexible material such as silicone, EPDM or a special formula of their alloy.

[0132] The compression valve chambers (12) and the tube filter chamber (13) are preferably connected to each other by a mechanical element (e.g. a bolt) and formed into a single unit. The three chamber connecting part (11 ), the compression valve chamber (12) and the tube filter chamber (13) are preferably made of metal and / or hard plastic material. In the invention, there are two three- chamber connecting parts (11 ). The first of these is at the entrance of the powder transfer unit (1), the other is at its exit. In the invention, the powder paint (H1) coming from the chamber (H) is taken from a suction pipe (H4) to the three chamber connecting part (11), and to the compression valves (P1 , P2, P3) in the compression valve chambers (12) via the three chamber connecting part paths (111). The three chamber connecting part paths (111 ), which enable the three paint paths in the three chamber connecting part (11 ) to become a single path, are preferably arranged in a geometric structure in the shortest and equal distance. When the compression valves (P1 , P2, P3) are compressed by the compression valve air (A2), the powder paint (H1) is transferred to the suctionpressure chambers (EB1 , EB2, EB3) in the tube filter chamber (13). In the suction-pressure chambers (EB1 , EB2, EB3), powder paint (H1 ) is supplied to the three chamber connecting part paths (111 ) in the lower three chamber connecting part (11 ) with the help of the main air (A1 ) and the compression valves (P4, P5, P6) in the lower compression valve chamber (12) and from there it is transferred to the transfer pipe (H5). In the invention, the compression valves (P1 , P2, P3, P4, P5, P6) are made of flexible material and when air is supplied, they are in a position to compress and close the path, and when the air is released, they expand and open the path. In this way, the suctionpressure chambers (EB1 , EB2, EB3) can perform the suction and thrust (pressure) functions. With the 3 suction-pressure chambers (EB1 , EB2, EB3) and 6 compression valves (P1 , P2, P3, P4, P5, P6) in the invention, the pump in question has a regular paint flow and allows precise control of the powder paint (H1). Suction-pressure chambers (TB1 , TB2, TB3) provide powder paint (H1 ) flow in a way that allows continuity by performing suction and pressure processes at different time intervals.

[0133] In the invention, there is powder paint (H1 ) in the chamber (H). Under the powder paint (H1 ) in the chamber (H), there is an fluidization plate (H2). The fluidization plate (H2) has air permeability but not the permeability of the powder paint (H1 ). In this way, a non-permeable part (H3) was created at the bottom of the reservoir (H). In the invention, the powder paint (H1 ) is transferred to the suction pipe (H4) by the air coming from the under-chamber pneumatic line (A6) in the non-permeable part (H3). When compressed air is supplied to the section of the chamber (H) that is impermeable to powder paint (H3) from the underchamber pneumatic line (A6), the thermoset / thermoplastic / enamel powder (H1) begins to bubble and behave like a fluid. Thermoset / thermoplastic / enamel powder paint (H1 ), which is supplied with air from below and starts to behave like a fluid, can be absorbed through the suction pipe (H4). The powder paint (H1) taken by the suction pipe (H4) passes through the powder transfer unit (1 ) and is transferred to the transfer pipe (H5). It is transferred to the powder paint gun (TB) via the transfer pipe (H5). In the invention, the powder paint gun (TB) comprises a powder coating trigger (TB1 ) that sprays powder coating (H1) when pressed. The powder paint (H1), pressurized with air coming from the gun needle air (A5) line, is sprayed at the tip of the powder paint gun (TB) and applied to the work piece (IP). In the invention, the powder paint gun (TB) is integrated into the control unit (K) via the gun signal connection (5). In the invention, there is a mixer part (65) in a section of the powder paint gun (TB). The function of the mixer part (65) is to ensure that the powder paint (H1) taken from the transfer pipe (H5) is mixed with the air coming from the mixer air (A4) line and made homogeneous. The mixer part (65) is connected directly to the powder paint gun (TB) when not in use, or it can be turned off by adjusting it from the control unit (K) if it is not used.

[0134] In the invention, the main air (A1) is constant pressure air produced in a compressor or generator and regulated as desired in a regulator. The transmission air (A3) ensures that the thermoset / thermoplastic / enamel powder paint absorbed into the internal volume of the tube filters (131 , 132, 133) is conveyed towards the powder paint gun (TB). Compression valve air (A2) is used to compress or loosen the compression valves (P1 , P2, P3, P4, P5, P6).

[0135] In the invention, the control of the main air (A1 ), compression valve air (A2), transmission air (A3), mixer air (A4), gun needle air (A5), under-chamber pneumatic line (A6) air and gun signal connection (5) is done via the screen or computer in the control unit (K).

Claims

CLAIMS1. A method of operating a powder paint pump having at least one powder transfer unit (1) which takes the powder paint (H1) in a chamber (H) via a suction pipe (H4) and transfers it to a transfer pipe (H5) to convey it to a powder paint gun (TB) or a chamber (H),• three suction-pressure chambers (EB1 , EB2, EB3),• a compression valve chamber (12) comprising the fourth compression valve (P4), the fifth compression valve (P5) and the sixth compression valve (P6) made of flexible material at the inlet section of said powder transfer unit (1 ),• a compression valve chamber (12) made of flexible material, comprising the first compression valve (P1 ), the second compression valve (P2) and the third compression valve (P3), at the outlet section of the powder transfer unit (1 ),• a tube filter chamber (13) comprising the first suction-pressure chamber (EB1), the second suction-pressure chamber (EB2) and the third suctionpressure chamber (EB3) which takes the powder paint (H1) from the direction of the suction pipe (H4) and transfers it to the direction of the transfer pipe (H5), formed between the compression valve chambers(12) in the inlet and outlet sections, the first tube filter (131 ), the second tube filter (132) and the third tube filter (133),• at least one pump body (2) that supplies compression valve air (A2) to the compression valves (P1 , P2, P3, P4, P5, P6) for tightening and loosening, and transmission air (A3) to the powder paint (H1) to the compression valve chamber (12) at the outlet of the tube filter chamber(13) for the suction-pressure chambers (EB1 , EB2, EB3), through the main air (A1 ) it has,• at least one control unit (K) controlling the air lines (A2, A3, A4, A5) gun signal connection (5) and electronic equipment required for the operation of the powder paint gun (TB), characterized by comprising the steps of;■ arranging the working period (WT) of the second suction-pressure chamber (EB2) in question to start T= WT / 3 time after the first suction-pressure chamber (EB1 ) starts working,■ arranging the working period (WT) of the third suction-pressure chamber (EB3) in question to start T= 2WT / 3 time after the first suction-pressure chamber (EB1 ) starts working,■ first suction-pressure chamber (EB1 ), the second suction-pressure chamber (EB2) and the third suction-pressure chamber (EB3) continuing to operate in repeated cycles to maintain the phase shift at the specified T= WT / 3 and T= 2WT / 3 time (T) values,■ directing the air and pressure in the pump by triggering the directional control valves (VT1 , VT2, VT3, VP1 , VP2, VP3, VP4, VP5, VP6, W1 , W2, W3, VPUR) that provide the mentioned cycle and cleaning actions of the pump at appropriate times.

2. A method according to claim 1 , characterized by comprising the process steps of;• Triggering the first valve pinch (VP1 ) from the moment T=0 to the moment T=WT / 2,• After the time T=0, after the delay time (D), triggering the first vacuum valve (W1 ) and remaining open for the vacuum open time (VA),• meanwhile, filling the powder paint (H1 ) in the suction pipe (H4) into the first suction-pressure chamber (EB1 ),• From time T=WT / 2 to time T=WT, triggering the first transfer valve (VT1 ) and the fourth valve pinch (VP4),• At T=0 and T=WT / 2, filling the powder paint (H1 ) in the first suctionpressure chamber (EB1 ), transferring towards the powder paint gun (TB).

3. A method according to claim 1 , characterized by comprising the process steps of;• Triggering of the fifth valve pinch (VP5) from the moment T=0 to the moment T=WT / 3,• After T=WT / 3, for a period of WT / 2, triggering the second valve pinch (VP2),• After the delay time (D), triggering the second vacuum valve (VV2) for the vacuum open time (VA),• meanwhile, filling the powder paint (H1 ) in the suction pipe (H4) into the second suction-pressure chamber (EB2),• followed by triggering of the second transfer valve (VT2) and the fifth valve pinch (VP5) for WT / 2 time• Filling the powder paint (H1) in the second suction-pressure chamber (EB2) W / 2 time ago, transferring towards the powder paint gun (TB).

4. A method according to claim 1 , characterized by comprising the process steps of;• Triggering of the third valve pinch (VP3) from the moment T=0 to the moment T=WT / 6,• Triggering of the third transfer valve (VT3) and the sixth valve pinch (VP6) from the moment T=WT / 6 to the moment T=2*WT / 3,• Triggering the third valve pinch (VP3) for WT / 2 time,• After the delay time (D), triggering the third vacuum valve (W3) for the vacuum open time (VA),• meanwhile, filling the powder paint (H1 ) in the suction pipe (H4) into the third suction-pressure chamber (EB3),• followed by triggering of the second transfer valve (VT2) and the fifth valve pinch (VP5) for WT / 2 time,• Filling the powder paint (H1) in the third suction-pressure chamber (EB3) WT / 2 time ago, transferring towards the powder paint gun (TB).

5. A method according to claim 1 , characterized in that; cleaning is carried out from the pump to the chamber (H) or from the pump to the powder paintgun (TB) or both together by triggering the cleaning valve (VPIIR) and the valve pinches (VP1 , VP2, VP3, VP4, VP5, VP6).

6. A method according to claim 5, characterized in that; the cleaning valve (VPIIR) performs the cleaning process from the pump to the chamber (H) by triggering the first valve pinch (VP1 ), the second valve pinch (VP2), the third valve pinch (VP3), the first transfer valve (VT1), the second transfer valve (VT2) and the third transfer valve (VT3).

7. A method according to claim 5, characterized in that; the cleaning valve (VPIIR) performs the cleaning process from the pump to the powder paint gun (TB) by triggering the fourth valve pinch (VP4), the fifth valve pinch (VP5), the sixth valve pinch (VP6), the first transfer valve (VT1 ), the second transfer valve (VT2) and the third transfer valve (VT3).

8. A powder paint pump having at least one powder transfer unit (1 ) which takes the powder paint (H1 ) in a chamber (H) via a suction pipe (H4) and transfers it to a transfer pipe (H5) to convey it to a powder paint gun (TB) or a chamber (H),• at least one powder transfer unit (1 ),• three suction-pressure chambers (EB1 , EB2, EB3),• a compression valve chamber (12) comprising the fourth compression valve (P4), the fifth compression valve (P5) and the sixth compression valve (P6) made of flexible material at the inlet section of said powder transfer unit (1 ),• a compression valve chamber (12) made of flexible material, comprising the first compression valve (P1 ), the second compression valve (P2) and the third compression valve (P3), at the outlet section of the powder transfer unit (1 ),• a tube filter chamber (13) comprising the first suction-pressure chamber (EB1), the second suction-pressure chamber (EB2) and the third suctionpressure chamber (EB3) which takes the powder paint (H1) from the direction of the suction pipe (H4) and transfers it to the direction of thetransfer pipe (H5), formed between the compression valve chambers(12) in the inlet and outlet sections, the first tube filter (131 ), the second tube filter (132) and the third tube filter (133),• at least one pump body (2) that supplies compression valve air (A2) to the compression valves (P1 , P2, P3, P4, P5, P6) for tightening and loosening, and transmission air (A3) to the powder paint (H1) to the compression valve chamber (12) at the outlet of the tube filter chamber(13) for the suction-pressure chambers (EB1 , EB2, EB3), through the main air (A1 ) it has,• at least one control unit (K) controlling the air lines (A2, A3, A4, A5) gun signal connection (5) and electronic equipment required for the operation of the powder paint gun (TB), characterized by comprising;■ Transfer valves (VT1 , VT2, VT3) that transfer the vacuum power produced by the vacuum generators (VAC1 , VAC2, VAC3) to the suction-pressure chambers (EB1 , EB2, EB3) on the said pump body (2),■ vacuum valves (W1 , W2, W3) that produce vacuum in vacuum generators (VAC1 , VAC2, VAC3) with air supplied from an air regulator (HR),■ valve pinches (VP1 , VP2, VP3, VP4, VP5, VP6), which are triggered to open and close the compression valves (P1 , P2, P3, P4, P5, P6),■ first suction-pressure chamber (EB1 ) which starts to operate at T=0 by triggering said directional control valves (VT1 , VT2, VT3, VP1 , VP2, VP3, VP4, VP5, VP6, W1 , W2, W3, VPUR), second suction-pressure chamber (EB2) which starts to operate WT / 3 time after the first suction-pressure chamber (EB1 ), the third suction-pressure chamber (EB3) which starts to operate 2WT / 3 time after the first suction-pressure chamber (EB1 ).

9. A pump according to claim 8, characterized by comprising at least one cleaning valve (VPUR) in the pump body (2), which performs cleaning fromthe pump to the chamber (H) or from the pump to the powder paint gun (TB) or both together by triggering the valve pinches (VP1 , VP2, VP3, VP4, VP5, VP6).10.A pump according to claim 8, characterized by comprising;• main control card (K1 ) that controls the proportional pressure control valves (K11 , K12, K12) in the control unit (K) and allows the general air from the main air line (A1 ) to be regulated as desired for the delivery air (A3), gun needle air (A5), mixer air (A4) and their pressures to be adjusted,• pump driver board (K2) controlling directional control valves (VT1 , VT2, VT3, VP1 , VP2, VP3, VP4, VP5, VP6, VV1 , W2, VV3, VPUR),• proportional control valves (K11 , K12, K13) that provide pressurization of general air, delivery air (A3), gun needle air (A5), mixer air (A4) from the main air line (A1 ),• pressure compensation tank (K3), which supplies the pressure required to close the pinch valves (P1 , P2, P3, P4, P5, P6) by triggering the valve pinches (VP1 , VP2, VP3, VP4, VP5, VP6),• pressure sensor (BS), which measures the pressure of the air in the pressure compensation tank (K3) and transmits this pressure value as electrical information to the pump driver board (K2),• a filling valve (VD) that keeps the air in the pressure compensation tank (K3) at the desired pressure.

11. A pump according to claim 8, characterized in that, the transfer valves (VT1 , VT2, VT3) are made of three-way two-position (3 / 2) valves and are externally piloted valves.

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