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.

Description

[0001] THREE-CHAMBER APPLICATION PUMP FOR POWDER COATING

[0002] Field of the Invention

[0003] The present invention relates to a powder paint pump comprising three suctionpressure 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 suctionpressure principle ensure that the powder paint is sucked from a chamber and sent to the powder paint gun, thus applying powder paint to the work piece.

[0006] Injectors based on the Venturi principle provide a more regular paint flow compared to pumps based on the suction-discharge principle and are frequently used in the industry due to their affordable cost. Although pumps based on the suction-discharge 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 chamber to the powder coating 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 chamber to the powder coating 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. 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 operating 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

[0008] 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 operating 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.

[0009] The publication numbered US10604360B2, encountered in the literature research relates to a powder paint pump in which a single chamber performs suction and discharge, and the second chamber connected in series to this chamber does not perform suction. In the operating method shown in this publication, the dye is sent phase by phase, one full and one empty. This operating 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

[0010] As a result, there is a need for a new application pump that surpasses the current state of the art and eliminates its disadvantages for use in the powder coating process.

[0011] Detailed Description of the Invention

[0012] The present invention is 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. The invention is used to send thermoset / thermoplastic / enamel powder paint from a chamber to a powder coating gun or another chamber. It works precisely and quickly to ensure that the thermoset / thermoplastic / enamel powder paint is sprayed evenly from the powder coating 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.

[0013] The invention comprises three suction-pressure chambers and thus provides a solution to the irregular flow problem caused by the phase-phase operation of powder pumps, as it has a structure that provides continuity in the suction and discharge process. In addition to having a regular paint flow, the invention also allows precise control of the powder paint.

[0014] Description of the Figures:

[0015] 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;

[0016] Figure - 1 View showing the powder transfer unit with three suction and pressure chambers included in the invention, the powder coating 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.

[0017] Figure - 2 Detailed cross-sectional view of the powder transfer unit in the pump which is the subject of the invention.

[0018] 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. Part References

[0019] I . Powder transfer unit

[0020] II. Three chamber connecting part

[0021] 111. Three chamber connecting part path

[0022] 12. Compression valve chamber

[0023] 13. Tube filter chamber

[0024] 131. First tube filter

[0025] 132. Second tube filter

[0026] 132. Third tube filter

[0027] 2. Pump body

[0028] EB1. First suction-pressure chamber

[0029] EB2. Second suction-pressure chamber

[0030] EB3. Third suction-pressure chamber

[0031] P1. First compression valve

[0032] P2. Second compression valve

[0033] P3. Third compression valve

[0034] P4. Fourth compression valve

[0035] P5. Fifth compression valve

[0036] P6. Sixth compression valve

[0037] A1. Main air

[0038] A2. Compression valve air

[0039] A3. Transmission air

[0040] A4. Mixing air

[0041] A5. Gun needle air

[0042] A6. Under-chamber pneumatic line

[0043] IP. Work piece

[0044] H. Chamber

[0045] H1. Powder paint

[0046] H2. Fluidization plate

[0047] H3. Non-permeable zone

[0048] H4. Suction pipe

[0049] H5. Transfer pipe

[0050] TB. Powder paint gun TB1. Powder paint gun trigger

[0051] 5. Gun signal connection

[0052] 65. Mixer part

[0053] K. Control unit

[0054] Description of the Invention:

[0055] 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.

[0056] 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 (H 1) 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 (H 1) 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 coating 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.

[0057] 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 suctionpressure 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 (H 1 ) in the chamber (H) is transferred to the powder coating gun (TB). In this way, the invention not only has a regular paint flow but also allows precise control of the powder paint (H 1 ).

[0058] 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) can be supplied into the suction-pressure chambers (EB1, EB2, EB3) without powder coating (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.

[0059] 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 discharge 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.

[0060] 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 suction-pressure 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 suction-pressure chambers (EB1, EB2, EB3) can perform the suction and thrust (pressure) functions. With the 3 suctionpressure 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.

[0061] In the invention, there is powder paint (H1) in the chamber (H). Under the powder coating (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 coating (H1). In this way, a Non-permeable zone (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 zone (H3). When compressed air is supplied to the section of the chamber (H) that is impermeable to powder paint (H3) from the under-chamber 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 coating gun (TB) via the transfer pipe (H5).

[0062] In the invention, the powder coating 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 coating 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 coating 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 coating 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.

[0063] 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 coating gun (TB). Compression valve air (A2) is used to compress or loosen the compression valves (P1 , P2, P3, P4, P5, P6).

[0064] In the invention, the control of the main air (A1), compression valve air (A2), delivery 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 powder paint (H1) application pump having at least one powder transfer unit (1) which takes the powder paint (H1) in a chamber (H) through a suction pipe (H4) and transfers it to a transfer pipe (H5) to deliver it to a powder paint gun (TB) or a chamber (H), characterized in that, it comprises;• a compression valve chamber (12) containing the fourth compression valve (P5), the fifth compression valve (P5) and the sixth compression valve (P6) made of flexible material, which opens and closes the way for transferring the powder paint (H1) in the suction pipe (H4) to the suction-pressure chambers (EB1, EB2, EB3) in the inlet section of the said powder transfer unit (1),• a compression valve chamber (12) containing the first compression valve (P1), the second compression valve (P2) and the third compression valve (P3) made of flexible material, which opens and closes the way for transferring the powder paint (H1) from the suction-pressure chambers (EB1, EB2, EB3) to the transfer pipe (H5) at the outlet section of the powder transfer unit (1),• a tube filter chamber (13) between the compression valve chambers (12) in the inlet and outlet sections,• in that; said tube filter chamber (13) comprises;■ the first tube filter (131), the second tube filter (132) and the third tube filter (133), which are arranged to be air permeable and impermeable to powder paint (H 1),■ the first suction-pressure chamber (EB1), the second suction-pressure chamber (EB2) and the third suction-pressure chamber (EB3) in the inner volume of the first tube filter (131), second tube filter (132) and third tube filter (133), the powder paint (H1) coming from the compression valve chamber (12) at the inlet is sent to the compression valve (12) at the outlet,• 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 (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 coating gun (TB).

2. A powder paint (H1) application pump according to claim 1 , characterized by comprising two three-chamber connecting parts (11) that connect the compression valve chambers (12) in the inlet and outlet sections.

3. A powder paint (H1) application pump according to claim 2, characterized by comprising the three chamber connecting part path (111) in the three chamber connecting pieces (11) which distributes the powder paint (H1) coming from the suction pipe (H4) to the compression valves (P4, P5, P6) in the upper compression valve chamber (12) and which transfers the powder coating (H1) from the compression valves (P1, P2, P3) in the lower compression valve chamber (12) to the transfer pipe (H5).

4. A powder paint (H1) application pump according to claim 3, characterized by comprising three chamber connecting part paths (111) arranged in a geometric structure so as to be at the shortest and equal distance.

5. A powder paint (H1) application pump according to claim 1 , characterized by comprising tube filters (131 , 132, 133) arranged in a geometric structure so that the distance between them is preferably the shortest and equal.

6. A powder paint (H1) application pump according to claim 5, characterized in that; said tube filters (131 , 132, 133) may have a circular cross-section tube or pipe-like structure, or they may have square, rectangular or elliptical cross-section shapes.

7. A powder paint (H1) application pump according to claim 1 , characterized by comprising the upper compression valve chamber (12) compression valves (P1, P2, P3) and the lower compression valve chamber (12) compression valves (P4, P5, P6) arranged in a geometric structure so that their distance from each other is the shortest and equal.

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