JP2008126173A - Coating apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve efficient and economical coating work by carrying out two different kinds of coating works using one coating gun. <P>SOLUTION: A coating apparatus 10 is provided with one coating gun 16. The coating gun 16 is provided with a first coating material spray port 40, a first coating material passage 38 communicating with the first coating material spray port 40, a second coating material spray port 50 and a second coating material passage 46 communicating with the second coating material spray port 50. The coating gun 16 is provided with a first coating material supply mechanism 18 for supplying a first coating material to the first coating material spray port 40 and a second coating material supply mechanism 20 for supplying a second coating material to the second coating material spray port 50. The coating work using the first coating material and the coating work using the second coating material are independently carried out by selectively driving the first coating material supply mechanism 18 and the second coating material supply mechanism 20. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a coating apparatus for coating two different types of coating materials with a single coating gun.

  For example, various coating operations are performed when molding the skin of an automobile interior material (instrument panel) and the skin of a handle or a lever. Specifically, in the production process of the skin material, a release agent application operation for applying a release agent to a mold for molding the skin material into a desired shape, and a desired skin color paint is applied to the skin material. The paint application operation is repeatedly performed.

  In this case, usually, a release agent application gun and a paint application gun are prepared separately, and the release agent application gun is first attached to the application device (application robot), and the mold is released from the mold. The agent is being applied. Then, after the release agent coating gun and the coating coating gun are exchanged with respect to the coating device, an operation of applying a desired skin color coating to the skin material using the coating coating gun is performed. It has been broken.

  As described above, in the coating apparatus, it is necessary to prepare a dedicated coating gun for each of the release agent coating operation and the paint coating operation, and to perform the operation of replacing the coating gun for each coating operation. is there.

  However, there is a problem that an exchange facility is required to replace each coating gun, and the equipment cost increases. In addition, the trajectory of the coating operation must be input for each coating gun and for each mold, and there is a problem that the teaching operation becomes complicated and the efficiency of the entire coating operation cannot be achieved.

  Thus, for example, a multi-component spray gun disclosed in Patent Document 1 is known. As shown in FIG. 9, the spray gun includes an air nozzle 1 and a fluid nozzle device 2, and the air nozzle 1 includes a pattern forming air orifice 3 a and an annular air orifice 3 b, which are provided in a passage 4. Communicate.

  In the fluid nozzle device 2, an orifice 6a is formed at the center via a needle 5, and an annular orifice 6b is formed around the orifice 6a. The orifice 6a communicates with the inlet 8a through the port 7 when the needle 5 is disposed at the retracted position. The annular orifice 6b communicates with the inlet 8b through the passage 9 from the outer periphery of the needle 5 when the needle 5 is disposed at the retracted position.

  When the needle 5 is disposed at the advanced position with different components introduced into the inlets 8a and 8b, the components are not supplied to the orifice 6a and the annular orifice 6b. On the other hand, when the needle 5 is disposed at the retracted position, the respective components are supplied to the orifice 6a and the annular orifice 6b, respectively, and are simultaneously ejected to the outside.

JP 58-263 A (FIG. 2)

  As described above, in Patent Document 1, two inlets 8a and 8b are provided, and different components are supplied to the inlets 8a and 8b, respectively, and the needle 5 is retracted, so that each component is an orifice 6a and an annular orifice 6b. Are simultaneously sprayed and atomized to mix the components. Therefore, Patent Document 1 is used only for a single coating operation, and a dedicated spray gun must be prepared for different coating operations. Thereby, there exists a problem that an efficient application | coating operation | work is not performed.

  The present invention solves this type of problem, and can provide a coating apparatus capable of performing two kinds of different coating operations with a single coating gun and performing an efficient and economical coating operation. The purpose is to provide.

  The present invention includes a first coating material jet port, a first coating material channel communicating with the first coating material jet port, a second coating material jet port, and a second coating material channel communicating with the second coating material jet port. A single coating gun provided; a first coating material supply mechanism that supplies a first coating material from a first coating material supply source to the first coating material outlet through the first coating material passage; A second application material supply mechanism for supplying a second application material from the application material supply source to the second application material ejection port via the second application material passage, an application operation by the first application material, and the second application. The present invention relates to a coating apparatus including a controller capable of selectively driving the first coating material supply mechanism and the second coating material supply mechanism in order to individually perform a coating operation using a material.

  The first coating material jet port is provided at the center of the coating gun, the second coating material jet port is provided around the first coating material jet port, and the coating gun is provided with the second gun. An atomizing air jet that is provided around the coating material ejection port and atomizes the first coating material ejected from the first coating material ejection port and the second coating material ejected from the second coating material ejection port. It is preferable to include an outlet and a molding air jet that is provided around the atomizing air jet and that forms a coating pattern of the first coating material and the second coating material to be atomized.

  Further, the molding air jets include a plurality of first molding air jets that circulate around the atomizing air jets, and a plurality of second molding air jets that go around the first molding air jets. It is preferable to have.

  Furthermore, it is preferable to provide a control unit that can control the flow velocity of the air ejected from the first molding air ejection port faster than the flow velocity of the air ejected from the atomization air ejection port.

  The first virtual circle in which the first molding air jet is disposed and the second virtual circle in which the second molding air jet are disposed constitute a concentric circle and the first molding air jet. It is preferable that the outlet and the second molding air jet outlet are provided corresponding to diagonal positions.

  According to the present invention, it is possible to individually perform the application operation using the first application material and the application operation using the second application material using a single application gun. Therefore, it is not necessary to replace the coating gun for each coating operation, and it is possible to eliminate the coating gun replacement facility.

  As a result, the equipment cost is reduced and the time required for the application gun replacement work is reduced. In addition, it is not necessary to perform teaching (application position input) operation for each application operation. For this reason, the entire coating operation can be performed efficiently and quickly with simple control.

  FIG. 1 is an explanatory diagram of a schematic configuration of a coating apparatus 10 according to the first embodiment of the present invention. In addition, although the coating device 10 is used for the skin molding of a handle | steering-wheel and levers other than the interior material of a motor vehicle, for example, it is not limited to this. For example, you may use for coloring of foodstuffs, application | coating of a coating agent and antiseptic | preservative, coloring of building materials, application | coating of an adhesive agent, etc.

  The coating apparatus 10 includes a coating robot 12, and a single coating gun 16 is attached to the tip of the wrist portion 14 of the coating robot 12. The application gun 16 includes, for example, a first application material supply mechanism 18 for supplying a first application material such as a release agent, paint, adhesive, or fragrance, and a release agent, paint, adhesive, or fragrance, for example. And a second coating material supply mechanism 20 that supplies a second coating material such as a second coating material. The first coating material supply mechanism 18 and the second coating material supply mechanism 20 can be selectively driven via the control unit 21.

  As shown in FIG. 2, the application gun 16 includes a main body part 22 constituting an application material supply part, an air supply part 24, and an air nozzle part 28 fixed to the air supply part 24 via a nut member 26. Is provided.

  A first port 30 for the first coating material and a second port 32 for the second coating material are formed in the main body 22. An inner tube 36 is attached to the central portion of the main body portion 22 via a fastening member 34, and the inner tube 36 opens at the distal end side of the air nozzle portion 28. A first coating material passage 38 communicating with the first port 30 is formed in the inner pipe 36, and the first coating material is ejected to the outside at the distal end side of the first coating material passage 38. The first application material ejection port 40 communicates.

  An outer tube 44 is attached to the main body 22 via a fastening member 42 so as to surround the inner tube 36. A second coating material passage 46 is formed between the outer tube 44 and the inner tube 36. One end of the second coating material passage 46 communicates with the second port 32 through the opening 48, and the other end of the second coating material passage 46 communicates with the second coating material ejection port 50.

  A first air port 52 for atomization and a second air port 54 for pattern formation are formed in the air supply unit 24. The first air port 52 is formed between an opening 56 provided on the outer periphery of the outer tube 44, a plurality of holes 58 formed in the wall of the air supply unit 24, and the air nozzle unit 28 and the outer tube 44. The atomizing air outlet 62 communicates with the opening 60. The atomizing air jet port 62 is provided around the second coating material jet port 50, and is ejected from the first coating material jet port 50 and the second coating material jet port 50. It has a function of atomizing the second coating material.

  The second air port 54 communicates from the air passage 64 to the molding air jet 68 through the circumferential opening 66 of the air nozzle portion 28. The molding air jets 68 are provided at a plurality of, for example, two locations, and are inclined by a predetermined angle toward the center line of the coating gun 16.

  As shown in FIG. 1, the first coating material supply mechanism 18 includes switching valves 70 a and 70 b for selectively supplying a desired first coating material, and a cleaning valve 72 for supplying a cleaning liquid. . Each switching valve 70a, 70b communicates with a first application material supply source (not shown) via pipes 74a, 74b. The switching valves 70 a and 70 b and the cleaning valve 72 are connected to the first port 30 via a conduit 76, and a first gear pump 78 is disposed in the conduit 76.

  The second coating material supply mechanism 20 includes switching valves 80 a and 80 b that can switch and supply a desired second coating material, respectively, and a cleaning valve 82. The switching valves 80a and 80b communicate with a second coating material supply source (not shown) via the conduits 84a and 84b. The switching valves 80a and 80b and the cleaning valve 82 and the second port 32 of the application gun 16 are connected via a pipe 86, and a second gear pump 88 is disposed in the pipe 86.

  Connected to the application gun 16 is a first drain conduit 90 a that communicates with the first port 30 and a second drain conduit 90 b that communicates with the second port 32.

  The operation of the coating apparatus 10 configured as described above will be described below.

  For example, when a release agent is applied as the first application material and a paint having a predetermined skin color is applied as the second application material, first, as shown in FIG. 3, a skin material such as an instrument panel for automobiles is formed. A molding die 94 is disposed. Therefore, the coating robot 12 constituting the coating apparatus 10 moves the coating gun 16 along the molding surface shape of the molding die 94 based on the teaching data taught in advance, and the release agent as the first coating material. Apply 96.

  Specifically, as shown in FIG. 1, in the first coating material supply mechanism 18, for example, a release agent 96 can be supplied through a conduit 76 under the switching action of the switching valve 70 a, and the pipe The first gear pump 78 disposed in the path 76 is driven and controlled. Therefore, a predetermined amount of release agent 96 is supplied from the conduit 76 to the first port 30 of the application gun 16.

  As shown in FIG. 2, the release agent 96 supplied to the first port 30 passes through the first coating material passage 38 formed in the inner tube 36 and passes through the first coating material jet port 40 to form a molding die 94. It is ejected toward the molding surface. At that time, the atomizing air supplied to the first air port 52 is introduced into the opening 60 through the opening 56 and the hole 58, and is formed around the outer tube 44. 62 is ejected forward. Accordingly, the release agent 96 ejected from the first coating material ejection port 40 is atomized.

  On the other hand, pattern forming air is supplied from the second air port 54 to the circular opening 66 through the air passage 64. For this reason, the mist-like mold release agent 96 is formed into a predetermined application pattern and sprayed onto the forming die 94 through the forming air ejected from the forming air outlet 68 communicating with the circumferential opening 66. Thereby, the application | coating operation | work of the mold release agent 96 with respect to the shaping | molding die 94 is performed.

  In the mold 94 in which the release agent 96 is applied, as shown in FIG. 4, after the skin material 98 is molded, a desired skin color is applied to the skin material 98 via the application gun 16. Paint 100 is applied.

  Specifically, as shown in FIG. 1, the second gear pump 88 is driven and controlled while the driving of the first gear pump 78 is stopped. The pipe 86 is supplied with, for example, a predetermined skin color paint 100 via a switching valve 80a, and the second gear pump 88 is driven and controlled, so that the second port 32 of the coating gun 16 is connected to the second port 32. The paint 100 is supplied in a predetermined amount.

  As shown in FIG. 2, the coating material 100 supplied to the second port 32 is ejected from the opening 48 through the second coating material passage 46 and from the second coating material ejection port 50 toward the skin material 98 ( (See FIG. 4). At that time, the paint 100 is atomized by the air ejected from the atomizing air ejection port 62, and is formed into a predetermined application pattern by the air ejected from the molding air ejection port 68, and the skin material 98. Is sprayed on. Thereby, the paint application | coating operation | work of the skin material 98 is performed.

  In this case, in the first embodiment, a single coating gun 16 is used to perform a release agent application operation using the release agent 96 (first application material) and a paint application operation using the coating material 100 (second application material). And can be performed individually. Therefore, unlike the prior art, it is not necessary to replace the dedicated application gun according to the release agent application operation and the paint application operation, and the application gun replacement facility can be dispensed with.

  As a result, the equipment cost is reduced and the time required for the application gun replacement work is reduced. In addition, the teaching work with the coating gun 16 need only be performed once on the mold 94. For this reason, it is not necessary to teach with the respective application guns corresponding to the release agent application work and the paint application work, and the teaching work can be simplified. Therefore, with the simple control by the control unit 21, it is possible to obtain an effect that various different coating operations can be performed efficiently and quickly.

  FIG. 5 is a schematic cross-sectional explanatory view of a coating gun 112 constituting a coating apparatus 110 according to the second embodiment of the present invention. In addition, the same referential mark is attached | subjected to the component same as the coating device 10 which concerns on 1st Embodiment, and the detailed description is abbreviate | omitted. Similarly, in the third embodiment described below, detailed description thereof is omitted.

  The air nozzle portion 28 constituting the coating gun 112 includes a plurality of first molding air jets 114 that circulate around the atomizing air jets 62 and a plurality of first air jets 114 that circulate around the first molding air jets 114. Two molding air jets 116 (corresponding to the molding air jets 68) are formed.

  For example, the second molding air jets 116 are provided at two locations. Desirably, the first molding air spout 114 has a molding pattern of the first coating material ejected from the first coating material ejection port 40 and a molding pattern of the second coating material ejected from the second coating material ejection port 50. The arrangement position and the number of arrangement are set so as to be accurately formed into a circular shape, for example, a circular shape.

  That is, usually, application work is performed on various objects to be coated. For example, depending on the shape of the object to be coated, the molding air ejected from the plurality of second molding air jets 116 is used. There may be a region in which a plurality of molding patterns molded in this manner do not overlap each other. For this reason, there exists a possibility that an application surface may become thick or thin partially.

  Therefore, in the second embodiment, a plurality of first molding air jets 114 are provided in the forward straight direction of the coating gun 112 in order to perform an excellent coating process on this type of coating object. As a result, the coating pattern formed by the molding air ejected from the second molding air jet 116 is pushed further forward by the molding air ejected from the first molding air jet 114. Thus, it is possible to obtain an effect that the coating operation is performed with high quality.

  FIG. 6 is a schematic cross-sectional explanatory view of a coating gun 122 constituting a coating apparatus 120 according to the third embodiment of the present invention.

  The air nozzle portion 28 constituting the coating gun 122 is provided with a plurality of first molding air jets 114 and second molding air jets 116, respectively, as in the second embodiment. The air supply unit 24 includes a first air port 52, a second air port 54, and a third air port 124. The first air port 52 communicates only with the atomizing air outlet 62. The third air port 124 communicates with the opening 128 through the passage 126, and the opening 128 communicates with the first molding air jet port 114.

  As shown in FIG. 7, the first virtual circle 130 in which the first molding air jet port 114 is arranged with respect to the center of the coating gun 122 and the second virtual circle in which the second molding air jet port 116 is arranged. 132 forms a concentric circle, and the first molding air jet port 114 and the second molding air jet port 116 are provided corresponding to diagonal positions.

  Here, three second molding air jets 116 are provided on the second imaginary circle 132 at equal angular intervals, while the first molding air jets 114 are provided on the first imaginary circle 130. Three units are provided as three units at equal angular intervals.

  As shown in FIG. 8, the coating apparatus 120 includes a first flow controller 134, a second flow controller 136, and a third flow controller 138 connected to the first air port 52, the second air port 54, and the third air port 124. Is provided. Air pumps 140a, 140b and 140c are interposed between the first air port 52, the second air port 54 and the third air port 124 and the first flow rate controller 134, the second flow rate controller 136 and the third flow rate controller 138. Is done.

  The first flow controller 134, the second flow controller 136, and the third flow controller 138 are connected to the controller 142. The control unit 142 performs drive control of the entire coating apparatus 120 and makes the flow velocity of the air ejected from the first molding air ejection port 114 faster than the flow velocity of the air ejected from the atomization air ejection port 62. It also has a function to control. The control unit 142 stores air flow rate data in accordance with the combination of the first coating material and the second coating material, and an optimal air flow rate can be set for the first coating material and the second coating material. It is.

  In 3rd Embodiment comprised in this way, while the air supplied to the 1st air port 52 is ejected from the atomization air jet outlet 62, the 1st coating material or the 2nd coating material is atomized, The air supplied to the third air port 124 is jetted forward from the plurality of first molding air jets 114 through the passage 126 and the opening 128.

  Therefore, the straightness of the atomized first coating material or second coating material can be improved, and a desired coating pattern can be obtained by cooperating with the air ejected from the second molding air jet 116. It becomes possible to mold reliably.

  In particular, in the third embodiment, the flow velocity of air ejected from the first shaping air ejection port 114 can be set faster than the flow velocity of air ejected from the atomization air ejection port 62. Thereby, the shielding effect by the air ejected from the first molding air jet port 114 is improved, and the first coating material atomized outside the air flow ejected from the first molding air jet port 114. Alternatively, it is possible to reliably prevent the second coating material from flowing out.

  Moreover, the first virtual circle 130 in which the first molding air jet 114 is arranged and the second virtual circle 132 in which the second molding air jet 116 is arranged constitute a concentric circle and the first The molding air jet port 114 and the second molding air jet port 116 are provided corresponding to the diagonal positions. Therefore, there is an advantage that the shielding effect is further improved by the shielding function by the air ejected from the first molding air ejection port 114 provided corresponding to the second molding air ejection port 116 and the diagonal position. .

It is schematic structure explanatory drawing of the coating device which concerns on the 1st Embodiment of this invention. It is a schematic cross-sectional explanatory drawing of the coating gun which comprises the said coating device. It is operation | movement explanatory drawing at the time of apply | coating a mold release agent with the said coating device. It is operation | movement explanatory drawing at the time of apply | coating a coating material with the said coating device. It is a schematic sectional explanatory drawing of the coating gun which comprises the coating device which concerns on the 2nd Embodiment of this invention. It is a schematic cross-section explanatory drawing of the coating gun which comprises the coating device which concerns on the 3rd Embodiment of this invention. It is front explanatory drawing of the said application gun. It is explanatory drawing of the air supply structure of the said coating device. It is sectional explanatory drawing of the spray gun currently disclosed by patent document 1. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Coating apparatus 12 ... Coating robot 16 ... Coating gun 18, 20 ... Coating material supply mechanism 21, 142 ... Control part 22 ... Main-body part 24 ... Air supply part 28 ... Air nozzle part 30, 32 ... Port 36 ... Inner pipe 38 , 46... Application material passage 40, 50... Application material ejection port 44. Outer tube 52, 54, 124... Air port 62. ... Release agent 100 ... Paint 110, 120 ... Application device 112, 122 ... Application gun 130, 132 ... Virtual circles 134 to 138 ... Flow rate controller

Claims (5)

A single coating material outlet, a first coating material passage communicating with the first coating material ejection port, a second coating material ejection port, and a second coating material passage communicating with the second coating material ejection port are provided. Application gun,
A first application material supply mechanism for supplying a first application material from the first application material supply source to the first application material ejection port via the first application material passage;
A second application material supply mechanism for supplying a second application material from the second application material supply source to the second application material ejection port via the second application material passage;
A controller capable of selectively driving the first coating material supply mechanism and the second coating material supply mechanism in order to individually perform the coating operation using the first coating material and the coating operation using the second coating material; ,
A coating apparatus comprising: 2. The coating apparatus according to claim 1, wherein the first coating material ejection port is provided in a central portion of the coating gun, and the second coating material ejection port is provided around the first coating material ejection port. And
The coating gun is provided around the second coating material ejection port, and the first coating material ejected from the first coating material ejection port and the second coating material ejected from the second coating material ejection port. An atomizing air outlet for atomizing the material;
An air outlet for molding for forming an application pattern of the first coating material and the second coating material to be atomized provided around the atomizing air jet port;
A coating apparatus comprising: The coating apparatus according to claim 2, wherein the molding air jet port includes a plurality of first molding air jet ports that circulate around the atomizing air jet port.
A plurality of second molding air jets that circulate around the first molding air jets;
A coating apparatus comprising:   4. The coating apparatus according to claim 3, wherein the flow rate of air ejected from the first molding air jet port can be controlled faster than the flow rate of air jetted from the atomizing air jet port. A coating apparatus comprising a portion. 5. The coating apparatus according to claim 3, wherein the first virtual circle in which the first molding air jet port is disposed and the second virtual circle in which the second molding air jet port is disposed are concentric circles. With composition
The first forming air jet port and the second molding air jet port are provided corresponding to diagonal positions with respect to each other.

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