JPH09131552A - Spray coating device for wax - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spray coating device simple in a constitution, excellent in operability and capable of reducing production cost. SOLUTION: A container tank B is integrally attached to an introducing port 1a for a coating liquid in a spray gun A and a heating means C for melting a solid wax by heating is provided in the container tank B. The spray gun A and the container tank B are covered with a heat insulating layers 6, 11a and 11b. Then the molten wax is applied on an objective surface as a coating liquid.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wax spray coating apparatus for heating and melting a solid wax in a storage tank and spray coating the solid wax onto a target surface with a spray gun.

[0002]

2. Description of the Related Art An apparatus for heating and melting a solid wax in a storage tank and spraying the solid wax onto a target surface by a spray gun is disclosed in Japanese Patent Laid-Open No. 6-285428.
Are known in the art.

This conventional wax spray coating device is shown in FIG.
As shown in FIG. 5, a tank 52 containing the heated and melted wax W, a low-pressure air supply pipe 53 connected to the tank 52, and an outlet pipe 54 for taking out the liquid wax in the tank 52 to the outside.
And a spray gun 58 in which the outlet pipe 54 is connected to one connection port 55 and the high pressure air supply pipe 57 is connected to the other connection port 56.

An electric heater (both not shown) is incorporated in the tank 52 and the outlet pipe 54 to heat and melt the wax, and in order to prevent solidification of the wax W due to heat radiation and cooling, each member is provided. Is covered with a heat insulating layer made of a heat insulating material. The wax W is kept at a constant temperature of about 60 to 70 degrees by a temperature adjusting sensor (not shown) provided in the tank 52 and the outlet pipe 54.

After moving the main body 61 to the vicinity of the vehicle by the wheel 60, the worker extends the lead-out pipe 54 and directs the spray gun 58 toward the target surface, and pulls the trigger to make the wax into fine particles. It is applied by spraying. After spraying, the coated surface is rubbed with a waste cloth, mop or the like, which allows the coated surface to have a gloss finish.

[0006]

The spray coating apparatus according to the above proposal is provided with a tank 52 in a main body 61 and introduces a molten wax to a spray gun 58 by a long outlet pipe 54. For this reason, the structure becomes complicated, the manufacturing cost increases, and the installation place is required. Therefore, it cannot be widely spread.

Further, even when performing the spray coating work, since the outlet pipe 54 and the main body 61 must be constantly laid around, the spray gun 58 cannot be operated as desired, resulting in a great labor burden. Was given.

Further, it has been pointed out that the conventional spray coating apparatus requires a long lead-out pipe 54, and therefore has a large electric heater capacity and a high running cost. In addition, a spray gun 58 at the end of the wax flow path
No heat dissipation measures were taken, so that it was not preferable in that power loss due to cooling was large.

The present invention has been made by paying attention to the above-mentioned problems of the prior art. By simplifying the structure, the manufacturing cost can be reduced and the installation place can be eliminated. It is intended to provide a wax spray coating device having excellent operability.

Another object of the present invention is to provide a spray coating apparatus capable of coating wax at a low running cost while keeping the electric heater capacity small and the heat radiation loss as small as possible.

[0011]

In order to achieve the above object, the wax spray coating apparatus according to the present invention is as follows.

That is, the gist of the invention is that a wax storage tank is provided directly at the inlet of the coating liquid in the spray gun, and heating means for heating and melting the wax is provided in the storage tank and the spray gun and the storage tank are provided. Is coated with a heat insulating heat insulating layer, and the melted wax is applied as a coating solution onto the target surface by spraying.

The wax spray coating apparatus according to the present invention is characterized in that, in claim 2, the spray gun and the storage tank are made of a material having good thermal conductivity.

The wax spray coating apparatus according to the present invention is characterized in that, in claim 3, the heat insulating layer of the storage tank is constituted by a vacuum chamber.

[0015]

In the spray coating apparatus according to the present invention, a storage tank provided with a heating means is integrally attached to the inlet of the coating liquid in the spray gun, and both are moved together to perform the coating work. The heat insulating layer that covers the spray gun and the storage tank is shortened by integration, and the capacity of the electric heater and the heat radiation loss can be suppressed to be small.

When the spray gun and the storage tank are made of a good heat conductive material, the flow path of the wax is maintained at a uniform temperature by heat conduction, so that the flow of the molten wax is smooth.

When the heat-retaining layer of the storage tank is a vacuum chamber, the heat radiation loss is reduced, and a higher heat-retaining effect can be obtained.

[0018]

EXAMPLES One example of the wax spray coating apparatus according to the present invention will be described below.

In FIG. 1, reference character A denotes the entire spray gun, which is provided with an injection portion 2 at the tip of a pistol-shaped main body 1 having a grip portion. The main body 1 is provided with a pressure air introduction port 1a and a coating liquid introduction port 1b, and the injection unit 2 is provided with a nozzle 2a for injecting the coating liquid together with the pressure air. Reference numeral 4 is a trigger for opening and closing the nozzle 2a.

The structure of the spray gun A described above is a known one, and the entire structure is made of a metal material having good thermal conductivity. Reference numeral 5 is an air supply pipe connected to the inlet 1a for pressurized air through a pneumatic device which will be described later. Reference numeral 6 is a heat insulating heat insulating layer such as neoprene rubber covering the outer peripheral portions of the main body 1 and the injection portion 2.

Next, B shows the whole of the wax accommodating tank. The lid 7 is fixed to the lower side of the above-mentioned coating solution inlet 1b, and the tank 8 is detachably attached to the lid 7.
It is constituted by. The above wax storage tank B is arranged in a suspended state below the spray gun A. The lid 7 and the tank 8 are both made of lightweight metal having good thermal conductivity.

Reference numeral 9 denotes a coating liquid suction tube arranged through a hole 10 formed in the lid body 7. The suction pipe 9 has one end connected to the coating liquid inlet 1b and the other end at the bottom of the tank 8. To open.
The suction tube 9 is made of a metal material having a good thermal conductivity and fits tightly into the hole 10 to maintain a contact state.

Reference numeral 11a denotes a heat insulating heat insulating layer such as neoprene rubber that covers the outer peripheral portion of the lid 7. Reference numeral 11b denotes a heat insulating layer that covers the outer peripheral portion of the tank 8 and is made of the same material. The heat retaining layers 11a and 11b cover the whole of the storage tank B without a gap and connect the ends to the heat retaining layer 6 of the spray gun A.

12a is a plastic jacket 12b for covering the heat retaining layer 11a. 12b is a plastic jacket 12c provided so as to cover the heat retaining layer 11b with the side space 13 and the bottom space 14 therein. It is a bottom plate attached to the bottom of the jacket 12b so as to seal the side and bottom spaces 13 and 14.

Reference numeral C denotes a heating means for the storage tank B. The heating means C is an electric heater 16 inserted in a mounting hole 15 at the bottom of the tank 8 and a temperature adjustment provided via a heat transfer body 17. Heater 18 and electric heater 1 via power plug m
It is configured by a power cord n that supplies power to 6. The temperature controller 18 stops the power supply when the tank 8 reaches a predetermined temperature.

Reference numeral 19 is a main air pressure regulator 20 arranged between the air supply pipe 5 and the pressure air inlet 1a. Reference numeral 20 is a main air pressure regulator 19.
The operation knob 21 of the auxiliary air pressure regulator 22 is branched from the main air pressure regulator 19 and the operation knob 23 of the sub air pressure regulator 21 is a pressure indicating the supply pressure from the auxiliary air pressure regulator 21. It is total.

Reference numeral 24 denotes an air supply pipe provided in the sub air pressure regulator 21, one end of which is connected to the lid 7 to supply low pressure air to the storage tank B. In the above, the set pressure of the main air pressure regulator 19 is set to about 3 kgf / cm ² , and this is supplied to the spray gun A. The set pressure of the sub air pressure regulator 21 is 0.
It is set to about 5 kgf / cm ² and is supplied to the storage tank B.

In the electric circuit diagram of FIG. 2, Pa and P
b is an indicator light arranged at a proper position in the storage tank B. One indicator light Pa is, for example, a red lamp when the power is turned on, and the other indicator light Pb is, for example, blue when the temperature controller 18 is opened. Turn on the lamp. One of the above-mentioned indicator lights Pa indicates that the storage tank B has not reached the set temperature, and the other indicator light Pb indicates that the set temperature has been reached.

The structure of the wax spray coating apparatus according to one embodiment is as described above, and the operation is performed as follows.

First, the tank 8 is removed from the lid body 7, and a commercially available solid wax is put therein. As an example, this solid wax is mainly composed of wax such as carnauba wax,
It is obtained by dissolving this in silicone oil, vegetable oil, etc., and solidifies at room temperature. After containing the wax, the tank 8 is attached, the power cord n is connected, and the electric heater 16 is energized.

The electrothermal heater 16 heats the tank 8 by conduction heat to melt the wax. Then, the lid 7, the suction tube 9, and the spray gun A are sequentially heated by heat conduction. On the other hand, since the storage tank B and the spray gun A are covered with the heat insulating layers 6, 11a, 11b, heat loss due to heat dissipation is prevented and efficient heating is performed. The positive heating ends when the set temperature (60 to 70 degrees) of the temperature controller 18 is reached.

On the other hand, on-off valve (not shown)
To supply high-pressure air to the air supply pipe 5. This high-pressure air is supplied from the inlet 1a into the spray gun A by the main air pressure regulator 19, reduced in pressure by the sub air pressure regulator 21, and supplied from the air supply pipe 24 into the storage tank B. The inflow of the low-pressure air pressurizes the liquid surface of the wax.

When the above preparatory work is completed, hold the spray gun A with the storage tank B and use the nozzle 2a.
Is directed toward the vehicle body, which is the target surface, and the trigger 4 is operated to perform spray application work. The molten wax is ejected in the form of fine particles from the nozzle 2a, and can be applied uniformly as in a general application liquid.

The applied wax adheres to the target surface and is solidified.
The target surface can be gloss-finished by rubbing with a mop or the like.

It is desirable that the electric heater 16 is always supplied with power during the above-mentioned coating work. However, when the coating work is completed in a short time, the power cord n is removed to keep the temperature constant. There is no problem even if you go in the state. By removing the power cord n, the spray gun A can be operated smoothly.

In one embodiment, the heat insulating layer 11 having a heat insulating property is used.
Although the heat radiation from the storage tank B is prevented by a and 11b, a vacuum heat insulation method can be used instead.
That is, if a vacuum chamber is provided outside the lid 7 and the tank 8 and these are covered with the outer covers 12a and 12b, more efficient heating and heat retention can be performed.

Further, in one embodiment, the entire spray gun A is made of a good heat conductor, which is the inlet 1b for the coating liquid.
Only a part of the injection unit 2 having the nozzle 2a is sufficient. In this case, the heat retaining layer 6 can be configured by only a part of the above, that is, a wax flow path portion.

Further, in one embodiment, the heating means C is incorporated only in the storage tank B, but it goes without saying that the heating means C may be provided inside the heat retaining layer 6 close to the wax flow path of the spray gun A. , Can be appropriately designed and adopted.

Further, in one embodiment, the coating liquid inlet port 1b is provided.
Below the nozzle, that is, below the nozzle 2a, the storage tank B
Although it is attached, it is easy to arrange it on the opposite side. In this case, it is not necessary to supply low-pressure air to the storage tank B because the melted wax spontaneously flows out.

[0040]

As described above, in the wax spray coating apparatus according to the present invention, the tank for containing the molten wax is directly attached to the spray gun. For this reason, a large main body structure and a long lead-out pipe are not required, and it is possible to greatly simplify and reduce the cost. Further, the downsizing improves the operability of spray coating, and exerts an excellent effect that the labor burden of work can be reduced.

Furthermore, since the tank for storing the molten wax and the spray gun are covered with a heat insulating heat insulating layer, the heat radiation loss is small and the work can be performed at low cost. When the storage tank and spray gun are made of good heat conductor,
The fluidity of the molten wax can be kept uniform by conduction heat, and the effect that the spray coating can be smoothly performed can be exhibited.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an embodiment of a wax spray coating apparatus according to the present invention.

FIG. 2 is likewise an explanatory diagram of an electric circuit.

FIG. 3 is an explanatory diagram showing a configuration of a conventional wax spray coating device.

[Explanation of symbols]

 A spray gun B storage tank C heating means 1a inlet for pressurized air 1b inlet for coating liquid 2a nozzle 5 air supply pipe 6 heat retaining layer 7 lid 8 tank 11a heat retaining layer 11b heat retaining layer 16 electric heater 18 temperature regulator 24 air supply pipe

Claims (3)

[Claims] 1. A storage tank for the coating liquid is integrally attached to a spray gun having a pressure air inlet, a coating liquid inlet, and a nozzle for injecting the coating liquid together with the pressure air. A heating means for heating and melting the wax in the tank is provided, and further, the spray gun and the containing tank are covered with a heat insulating heat insulating layer, and the melted wax is applied as a coating liquid onto the target surface by spraying. Spray coating device. 2. The wax spray coating apparatus according to claim 1, wherein the spray gun and the storage tank are made of a material having good thermal conductivity. 3. The wax spray coating apparatus according to claim 1, wherein the heat insulation layer of the storage tank is constituted by a vacuum chamber.