JP2016101580A - Coating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coating device capable of supplying carbon dioxide to each of a plurality of coating lines from one carbon dioxide supply source which can achieve reduction in the size of the whole device and reduction in the cost, and can supply carbon dioxide to a mixer quantitatively.SOLUTION: A coating device includes a carbon dioxide supply source 2, a drive pump 4 for carbon dioxide for raising the pressure of carbon dioxide, a carbon dioxide supply line 5 including a plurality of carbon dioxide discharge lines 20 connected through connection means 19, a plurality of coating supply sources 6 and a plurality of air supply lines 7 connected to a plurality of coating supply lines 10 respectively, a plurality of drive pumps 9 for a coating for raising the pressure of a coating 8, a plurality of mixers 12 for mixing both a coating component and a carbon dioxide component and generating a coating material composition 11, and a plurality of injection means 13 for injecting the coating material composition. The plurality of carbon dioxide discharge lines are provided with a secondary pressure control valve 22 for carbon dioxide, a flow control valve 24, and a primary pressure control valve 26 for carbon dioxide in this order from the upstream.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a coating apparatus for applying a coating material composition to the surface of an object by operating an injection means (injection gun) regardless of whether it is movable property or real estate.

  In Patent Document 1, “a diluting solvent (thinner) used in organic solvent-based spray coating is used as a paint supply line in a carbon dioxide coating in which part or all of carbon dioxide is replaced with carbon dioxide; A carbon dioxide supply line having a paint high pressure pump that pressurizes the paint supplied from the tank to a predetermined pressure, a paint primary pressure adjusting valve that adjusts the discharge pressure of the paint high pressure pump and returns the excess to the paint tank. A tank for storing liquid carbon dioxide, a cooler for cooling the liquid carbon dioxide to a predetermined temperature, a liquid carbon dioxide high-pressure pump for pressurizing the liquid carbon dioxide supplied from the cooler to a predetermined pressure, and the liquid carbon dioxide It has a liquid carbon dioxide primary pressure adjustment valve that adjusts the discharge pressure of the high-pressure pump and returns the excess to the suction of the pump. As a line, a pressurized paint supplied from the paint supply line, a mixer for mixing the pressurized carbon dioxide supplied from the carbon dioxide supply line, and a mixed material supplied from the mixer A coating apparatus using carbon dioxide, characterized by having a spray gun for spraying a paint / carbon dioxide pressurized mixture onto an object to be coated under atmospheric pressure is disclosed.

  However, the known inventions described in the above Patent Documents 1 to 4 supply carbon dioxide from one carbon dioxide supply source to one coating line, and one dioxide dioxide to a plurality of coating lines. There was a problem that carbon dioxide could not be supplied from a carbon source.

In addition, this known invention is a coating apparatus in which liquid carbon dioxide is mixed with paint in a mixer and sprayed with a spray gun, which requires a carbon dioxide cylinder for taking out the liquid, and from the cylinder to the liquid pressure pump. In order to supply carbon stably, a cooler or the like for preventing evaporation is required, and it is difficult to reduce the size and cost of the equipment.

  Furthermore, the carbon dioxide cylinder for liquid removal needs to use a load cell or the like for the remaining amount management as well as the remaining amount in the cylinder after the carbon dioxide is taken out to the supplyable amount compared to the carbon dioxide cylinder for gas removal. There was a problem that the cost would be improved accordingly. These problems also apply to Patent Documents 2 to 4.

JP 2010-234348 A JP 2010-234349 A JP 2012-86150 A JP 2012-86151 A

  In view of the conventional drawbacks as described above, the present invention can supply carbon dioxide from a single carbon dioxide supply source to a plurality of coating lines, and can realize downsizing and low cost of the entire apparatus, pressure and flow rate. It aims at providing the coating device which can supply a carbon dioxide quantitatively to a mixer by adjusting so that it may become appropriate.

  In order to achieve the above object, a coating apparatus of the present invention is connected to a carbon dioxide supply source, a carbon dioxide drive pump that boosts the carbon dioxide supplied from the carbon dioxide supply source, and the carbon dioxide drive pump. A carbon dioxide supply line including a plurality of carbon dioxide discharge lines connected via the means, a plurality of paint supply sources and a plurality of air supply lines respectively connected to the plurality of paint supply lines, and the plurality of air supply lines A plurality of paint drive pumps that use the supplied air as a drive source to boost the paint supplied from the paint supply source, the plurality of paint supply lines connected to the paint drive pump, and the paint supply Line and the carbon dioxide discharge line, respectively, and both the paint and the carbon dioxide components are mixed to produce a coating composition. A plurality of mixers and a plurality of injection means connected to each of the plurality of mixers and for injecting the coating material composition. A secondary pressure adjusting valve for adjusting a secondary pressure of carbon dioxide from a carbon drive pump, a flow rate adjusting valve, and a primary pressure adjusting valve for adjusting a primary pressure of carbon dioxide supplied to the mixer are provided in this order. And

As is clear from the above description, the present invention has the following effects.
(1) In the invention described in claim 1, since the plurality of carbon dioxide discharge lines are each provided with a carbon dioxide quantitative supply mechanism, carbon dioxide is quantitatively measured without being influenced by other carbon dioxide discharge lines. Can be fed to the mixer.
(2) Since gaseous carbon dioxide is supplied to the carbon dioxide drive pump as a fluid diluent, the remaining amount in the cylinder after the carbon dioxide is taken out can be reduced.
(3) Since carbon dioxide is supplied to the carbon dioxide drive pump, there is no need to liquefy carbon dioxide, and a cooler or liquid carbon dioxide high-pressure pump is installed between the carbon dioxide supply source and the carbon dioxide drive pump. There is no need to do.
Therefore, it is possible to realize downsizing and cost reduction of the entire coating apparatus.
(4) The invention according to claim 2 also provides the same effects as the above (1) to (3), and supplies carbon dioxide as a gas from a plurality of portable cylinders. There is no need to manage the internal capacity of the portable cylinder, and the entire coating apparatus can be reduced in size and cost.
(5) In the inventions according to claims 3 to 5, the same effects as in the above (1) to (4) can be obtained.
(6) The invention according to claim 6 can obtain the same effects as the above (1) to (5), and can detect the ON / OFF of the injection means by the detection means and automatically open and close the gate valve. Can do.

1 to 3 are explanatory views showing a first embodiment of the present invention.
4 and 5 are explanatory views showing a second embodiment of the present invention.
FIG. 6 is an explanatory view showing a third embodiment of the present invention.
Schematic explanatory drawing. Schematic explanatory drawing of a paint supply line. Schematic explanatory drawing of a carbon dioxide supply line. Schematic explanatory drawing. Schematic explanatory drawing of a carbon dioxide supply line. Schematic explanatory drawing.

Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings.
In the first embodiment for carrying out the present invention shown in FIG. 1 to FIG. 3, reference numeral 1 denotes a coating apparatus according to the present invention. This coating apparatus 1 is a metal / synthetic resin regardless of whether it is movable or real estate. Regardless of whether it is made of concrete or concrete, a coating composition is applied to the surface of a robot, various machines and parts thereof, electric appliances and parts thereof, wall surfaces of buildings, and the like.

  The coating apparatus 1 includes a carbon dioxide supply source 2, a carbon dioxide drive pump 4 that pressurizes the carbon dioxide 3 supplied from the carbon dioxide supply source 2, and a connection means 19 connected to the carbon dioxide drive pump 4. Carbon dioxide supply line 5 having a plurality of carbon dioxide discharge lines 20 connected to each other, a plurality of paint supply sources 6 and a plurality of air supply lines 7 respectively connected to the plurality of paint supply lines, and the plurality of air supply lines A plurality of paint drive pumps 9 for boosting the paint 8 supplied from the paint supply source 6 using the air supplied from the paint supply source 7 and the plurality of paint supply lines connected to the paint drive pump 10 and the paint supply line 10 and the carbon dioxide discharge line 20, respectively, and mixed and coated with both the paint and the carbon dioxide components A plurality of mixers 12 that produce the composition 11 and a plurality of injection means 13 (for example, injection guns that are manually injected) that are respectively connected to the plurality of mixers 12 and inject the coating material composition 11. It is configured.

  The carbon dioxide driving pump 4 employs a pump that is activated by driving air, and the carbon dioxide supply source 2 is connected to the carbon dioxide driving pump 4 via a carbon dioxide connection line (pipe) 14. ing. In this embodiment, the carbon dioxide supply source 2 connects a plurality of portable cylinders 15 to a cylinder line switching mechanism 17 via a pressure detector 16, and the cylinder line switching mechanism 17 is connected to a carbon dioxide connection line 14. ing. The cylinder line switching mechanism 17 detects the pressure of the portable cylinder 15 detected by the pressure detector 16, and when the detected pressure becomes a predetermined pressure or less, the portable cylinder 15 that has become the predetermined pressure or less. The connection line 18 is closed and the connection line 18 of the other portable cylinder 15 is opened, so that the carbon dioxide 3 can be supplied stably and continuously.

In the present invention, since the gaseous carbon dioxide 3 is used, the weight of the portable cylinder 15 is detected by a device such as a load cell in order to switch the portable cylinder 15 for supplying the carbon dioxide by detecting the pressure. The remaining weight of the portable cylinder 15 can be easily and inexpensively managed by the pressure detector 16 (contact pressure gauge, etc.) without the need to manage the remaining weight. doing. The portable cylinder 15 is generally a cylinder having an internal capacity of 3.4 L to 47 L, but in the present embodiment, a plurality of 40 L cylinders are used.

  In addition, when supplying liquid carbon dioxide, a siphon tube is provided in the cylinder to discharge liquid carbon dioxide, but the length of the siphon tube varies, and when supplying carbon dioxide stably When the remaining amount in the cylinder remains to some extent, the cylinder that supplies carbon dioxide must be switched. On the other hand, when supplying carbon dioxide by gas like this invention, since the portable cylinder which supplies a carbon dioxide by pressure management can be switched, the residual amount in a cylinder can be reduced.

  When the carbon dioxide driving pump 4 is activated by driving air, gaseous carbon dioxide 3 is sucked from the carbon dioxide supply source 2 through the suction port, and gaseous carbon dioxide 3 is pumped from the discharge port. Therefore, the carbon dioxide drive pump 4 is a high-pressure pump that sucks and discharges the gaseous carbon dioxide 3. On the secondary side of the carbon dioxide drive pump 4, connection means 19 for connecting to the plurality of carbon dioxide discharge lines 20 is provided, and the carbon dioxide 3 boosted by the carbon dioxide drive pump 4 is supplied to the plurality of carbon dioxide discharge lines 20. It is supplied to the carbon discharge line 20. This connection means 19 is any connection means as long as it can be connected so that the carbon dioxide 3 supplied from the carbon dioxide supply source 2 as a source can be distributed to a plurality of carbon dioxide discharge lines 20. Also good.

  The carbon dioxide supply line 5 includes a carbon dioxide supply source 2, a carbon dioxide connection line 14, the carbon dioxide drive pump 4, a distributor 19 provided on the secondary side of the carbon dioxide drive pump 4, and the distribution And a plurality of carbon dioxide discharge lines 20 connected to the vessel 19.

  The plurality of carbon dioxide discharge lines 20 are carbon dioxide discharge lines that connect the carbon dioxide drive pump 4 and the mixer (mixing unit) 12. The paint supply source 6 and the air supply line 7 are provided for each carbon dioxide discharge line. And a paint drive pump 9 for boosting the paint 8 supplied from the paint supply source 6 using air supplied from the air supply line 7 as a drive source, and a paint supply connected to the paint drive pump. Line 10, a mixer 12 connected to the paint supply line 10 and the carbon dioxide supply line 6, respectively, for mixing the components of the paint and carbon dioxide to produce a coating material composition 11, and this mixer 12 and a plurality of injection means 13 for injecting the coating material composition 11 is provided, and the carbon dioxide discharge line 20 is a carbon dioxide drive pump 4. Supplying carbon dioxide 3 is pumped to the mixer 12. The properties of the carbon dioxide 3 at this time are not particularly limited, and may be gas or other properties.

Note that the number of carbon dioxide discharge lines 20 can be changed as appropriate, and is not particularly limited as long as a plurality of carbon dioxide discharge lines 20 are provided.
The carbon dioxide discharge line 20 located on the downstream side of the carbon dioxide supply line 5 (secondary side of the carbon dioxide drive pump 4) includes a carbon dioxide quantitative supply mechanism 21.

In the present embodiment, the carbon dioxide quantitative supply mechanism 21 is connected to the secondary pressure control valve 22, the flow meter 23, the flow control valve 24, the gate valve 25, and the mixer 12 that adjust the secondary pressure of the carbon dioxide drive pump 4. And a primary pressure adjusting valve 26 for adjusting the primary pressure of the supplied carbon dioxide.
By providing these devices on the secondary side of the carbon dioxide drive pump 4, it is possible to improve the quantitative supply accuracy. These devices are provided in the order of the secondary pressure adjustment valve 22, the flow meter 23, the flow rate adjustment valve 24, the gate valve 25, and the primary pressure adjustment valve 26 from the upstream side.

  By the way, the flow meter 23 and the flow rate control valve 24 may constitute the carbon dioxide quantitative supply mechanism 21 using an integrated type, and the primary pressure, the secondary pressure, the opening degree, and the orifice of the flow rate control valve 24 are set. When the flow rate is set in advance by providing it or the like, the carbon dioxide quantitative supply mechanism 21 may be configured without using the flow meter 23.

  Further, the gate valve 25 is not necessarily provided. Even when the flow meter 23 and the gate valve 25 are provided, the order of the secondary pressure control valve 22, the flow rate control valve 24, and the primary pressure control valve 26 from the upstream side. The flow meter 23 and the gate valve 25 can be provided in any order.

  Furthermore, between the cylinder line switching mechanism 17 of the carbon dioxide connection line 14 located upstream of the carbon dioxide supply line 5 (primary side of the carbon dioxide drive pump 4) and the carbon dioxide drive pump 4 as in the present embodiment. A pressure regulating valve 27 may be further provided. By providing the pressure adjustment valve 27 on the primary side of the carbon dioxide drive pump 4 as well, the quantitative supply accuracy can be further improved.

  The paint drive pump 9 is activated by drive air supplied from an air supply line 7, and the paint drive pump 9 is provided with one or more via a paint connection line (pipe) 28. The paint supply source 6 is connected.

  Therefore, when the paint driving pump 9 is activated by the driving air supplied from the air supply line 7, the paint 8 of the paint supply source 6 is sucked from the suction port, and the paint 8 is pumped from the discharge port. Therefore, the paint driving pump 9 is a paint high-pressure pump that sucks and discharges the paint 8. The paint supply line 10 includes a paint supply source 6, a paint connection line 28, the paint drive pump 9, and a paint discharge line 29. The paint discharge line 29 is connected to the paint drive pump 9 and a mixer ( The paint discharge line 29 is connected to the mixing unit 12, and the paint discharge line 29 supplies the mixer 12 with the paint 8 fed by pressure from the paint drive pump 9.

  In addition, as an example of the drive pump 9 for coating, SP1021, SP1628, SP1636, SP1844, SP1854 (Z), SP1878, SP2544, SP2554 (Z), SP2578, etc., which are pneumatic plunger pumps manufactured by Asahi Sunac Corporation. It can be used appropriately.

  Next, the function of the mixer 12 will be described. By the way, the detailed structure of the mixer 12 is preferably an appropriate micromixer in consideration of the channel diameter. The type and structure of the micromixer are well known matters (for example, paragraphs 0031 to 0033 of JP 2010-234348 A), and are therefore omitted.

  The mixer 12 is disposed downstream of the carbon dioxide discharge line 20 having the check valve 30 and the paint discharge line 29 having the check valve 31. The mixer 12 is connected to the paint drive pump 9 through the paint discharge line 29. Both the components of the acquired paint 8 and the carbon dioxide 3 acquired from the carbon dioxide discharge line 20 are mixed to produce the coating material composition 11. Moreover, the spraying means 13 marketed is used for the spraying means 13 mentioned above, this spraying gun 13 is connected with the said mixer 12 via the spraying hose 32, and the coating | covering material composition 11 produced | generated with the mixer 12 is used. Is sprayed onto the coating object 33 under atmospheric pressure.

  In addition, the air supply line 7 of the paint supply line 10 is provided with a flow sensor as the detecting means 34, and when the air supply amount of the air supply line 7 decreases, the gate valve 25 and the like of the carbon dioxide quantitative supply mechanism 21 are operated. And you may provide the control part 35 which stops supply of a carbon dioxide. The detection means 34 and the control unit 35 are desirably provided in a non-explosion-proof area.

[Different forms for carrying out the invention]
Next, different modes for carrying out the present invention shown in FIGS. 4 to 6 will be described. In the description of the different embodiments for carrying out the present invention, the same components as those in the first embodiment for carrying out the present invention are denoted by the same reference numerals, and redundant description is omitted.

The second embodiment for carrying out the present invention shown in FIGS. 4 and 5 is mainly different from the first embodiment for carrying out the present invention in that a stationary tank 36 requiring a capacity of 1 m ³ or more. The liquid carbon dioxide filled in is vaporized using the evaporator 37, and the carbon dioxide supply line 5A using the carbon dioxide supply source 2A for supplying the gaseous carbon dioxide 3 is used. However, the same effect as the first embodiment for carrying out the present invention can be obtained.

  The third embodiment for carrying out the present invention shown in FIG. 6 is mainly different from the first embodiment for carrying out the present invention in that the detecting means 34A for detecting the coating object 33 by the spraying means 13. Even in the case of such a coating apparatus 1B, the book can be controlled by the control unit 35 so that the gate valve 25 is opened only when the detection means 34A detects the coating object 33. The same effect as the first embodiment for carrying out the invention can be obtained.

  In addition, by providing the jetting means 13 with the detecting means 34A for detecting the coating object 33 in this way, the jetting means 13 (for example, automatic opening / closing) When the painting object 33 is in front of the spraying means 13 by coating the object 33 that has flown by detecting it with the detecting means 34A (for example, an infrared sensor). Only paint can be sprayed on.

  In the embodiment of the present invention, the air supply line or the jetting means is provided with the detection means. However, the present invention is not limited to this, and the paint discharge line is provided with a flow rate sensor as the detection means. The change in flow rate may be detected, or a limit switch as a detection means is provided in the injection means to detect the state of grasping the trigger of the injection means, and control to operate the gate valve etc. Alternatively, an output signal from a higher-level control device (such as a production line control computer) may be detected and controlled to operate a gate valve or the like.

  Further, the control unit may be a control unit that stores a control program in a storage unit and controls the gate valve based on the program, or a control using a relay circuit or the like (without a storage unit or the like). It is good also as a part.

  Further, in the embodiment of the present invention, the carbon dioxide driven pump is described as being driven by air, but the present invention is not limited to this, and a pump other than air driven, such as an electric pump, may be used.

  The present invention is used in the industry for manufacturing coating equipment.

1, 1A, 1B: coating apparatus, 2, 2A: carbon dioxide supply source,
3: Carbon dioxide, 4: Carbon dioxide drive pump,
5, 5A: carbon dioxide supply line, 6: paint supply source,
7: Air supply line, 8: Paint,
9: Paint drive pump, 10: Paint supply line,
11: Coating material composition, 12: Mixer,
13: injection means, 14: carbon dioxide connection line,
15: Portable cylinder, 16: Pressure detector,
17: cylinder line switching mechanism, 18: connection line,
19: connection means, 20: carbon dioxide discharge line,
21: Carbon dioxide quantitative supply mechanism, 22: Secondary pressure control valve,
23: Flow meter, 24: Flow control valve,
25: Gate valve, 26: Primary pressure regulating valve,
27: Pressure regulating valve, 28: Paint connection line,
29: Paint discharge line, 30: Check valve,
31: Check valve, 32: Injection hose,
33: Painting object 34, 34A: Detection means,
35: Control unit, 36: Stationary tank,
37: Evaporator.

Claims (6)

A carbon dioxide supply source, a carbon dioxide drive pump for boosting the carbon dioxide supplied from the carbon dioxide supply source, and a plurality of carbon dioxide discharge lines connected to the carbon dioxide drive pump via connection means A carbon dioxide supply line, a plurality of paint supply sources and a plurality of air supply lines respectively connected to the plurality of paint supply lines, and air supplied from the plurality of air supply lines as driving sources, respectively, from the paint supply source A plurality of paint drive pumps for boosting the supplied paint; the plurality of paint supply lines connected to the paint drive pump; and the paint connected to the paint supply line and the carbon dioxide discharge line, A plurality of mixers for producing a coating composition by mixing both components of the carbon dioxide, and each connected to the plurality of mixers And a plurality of injection means for injecting the coating material composition, and each of the plurality of carbon dioxide discharge lines adjusts the secondary pressure of carbon dioxide from the carbon dioxide drive pump from the upstream side. A coating apparatus comprising: a secondary pressure adjusting valve, a flow rate adjusting valve, and a primary pressure adjusting valve for adjusting a primary pressure of carbon dioxide supplied to the mixer. The carbon dioxide supply source has a cylinder switching mechanism, and can connect a plurality of portable cylinders filled with carbon dioxide via the cylinder switching mechanism to supply gaseous carbon dioxide. The coating apparatus according to claim 1. The carbon dioxide supply source is capable of evaporating carbon dioxide filled in a stationary tank requiring a capacity of 1 m ³ or more through an evaporator and supplying the carbon dioxide as gaseous carbon dioxide. The coating equipment described. The coating apparatus according to any one of claims 1 to 3, wherein the carbon dioxide quantitative supply mechanism further includes a flow meter and a gate valve. 5. The coating according to claim 4, wherein the carbon dioxide quantitative supply mechanism includes the secondary pressure control valve, the flow meter, the flow rate control valve, the gate valve, and the primary pressure control valve in this order from upstream. apparatus. 6. The coating apparatus according to claim 4, further comprising a detection unit that controls opening and closing of the gate valve based on a detection signal of the detection unit.

Images