KR101545727B1

KR101545727B1 - PVC coating apparatus and coating method using this apparatus

Info

Publication number: KR101545727B1
Application number: KR1020150050376A
Authority: KR
Inventors: 이병탁
Original assignee: (주)피아이디
Priority date: 2015-04-09
Filing date: 2015-04-09
Publication date: 2015-08-20

Abstract

The present invention relates to a PVA coating apparatus and a coating method using the PVA coating apparatus, which can easily control the thickness of the coating and prevent the loss of PVA sol, Can be removed.
The PVC coating apparatus includes a chain conveyor horizontally installed in the air; A carrier suspended along the chain conveyor to move along the chain conveyor and convey the article; A lifting furnace for preheating the product, a PVC tank for applying PVC to the surface of the product, a storage tank for storing the product, A far-infrared ray lamp for curing the surface of the PVA coated on the surface, a molten salt tank for burning and hardening the PVA coated on the surface of the article, a washing water tank for removing the molten salt on the surface of the article, Bed; The PVC tank is moved up and down by a hydraulic jack installed at a lower portion thereof, and the chain conveyor is bent downward at a molten salt tank position.

Description

TECHNICAL FIELD [0001] The present invention relates to a PVC coating apparatus and a coating method using the same,

The present invention relates to a PVA coating apparatus and a coating method using the PVA coating apparatus. More particularly, the present invention relates to a PVA coating apparatus and a coating method using the same, And to a coating method using the same.

PVC, polyvinyl choloride (PVC) can be coated on various extensions and handle parts of the apparatus for the purpose of rust prevention, impact protection, slip prevention, and appearance improvement.

The process of PV coating is roughly divided into steps of i) priming the article to be coated, ii) heating the article, iii) applying the PV sol to the surface of the heated article, vi ) &Lt; / RTI >

The most important step of PV coating is the PV coating step, which can be done by immersing and removing the product in the tank filled with PV coating. This process is performed automatically because the chain conveyor for conveying the articles is formed to have a downward curvature at the top of the tank so that the article can move along the chain conveyor and at the same time the height of the article can be adjusted.

However, when the article is loaded, the carrier tilts according to the inclination of the chain conveyor so that the article is firmly fixed in order to prevent the article from moving in the carrier. Even if the article is fixed to the carrier, the carrier moves along the inclination of the chain conveyor, The PVA sol may not be evenly applied. It is also possible to control the thickness of the applied V-Vis containing the part of the applied V-Vis seal before the product exits the tank and enters the curing stage.

On the other hand, the hot molten salt used to cure the PVS sol must be removed from the surface of the article after the curing process is completed. However, the conventional spray cleaning method has a problem in that it is not easy to completely remove the molten salt.

KR 10-2014-0104101 A

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a PVS coating apparatus capable of easily controlling the thickness of a PVS coating, And a coating method.

Also, it is an object of the present invention to provide a PVA coating apparatus and a coating method using the same that can completely remove a molten salt used in curing a PVA sol.

According to a preferred embodiment of the present invention for solving the above problems, there is provided a PV coating apparatus for coating a PV coating on an article, comprising: a chain conveyor horizontally installed in the air; A carrier suspended along the chain conveyor to move along the chain conveyor and convey the article; A lifting furnace for preheating the product, a PVC tank for applying PVC to the surface of the product, a storage tank for storing the product, A far-infrared ray lamp for curing the surface of the PVA coated on the surface, a molten salt tank for burning and hardening the PVA coated on the surface of the article, a washing water tank for removing the molten salt on the surface of the article, Bed; And the chain conveyor is bent downward at the position of the molten salt tank. The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

According to another embodiment of the present invention, the chain conveyor is bent downward from the wash water tank position.

According to another embodiment of the present invention, the washing water tank is vertically moved by a hydraulic jack installed at a lower portion of the washing water tank.

According to another embodiment of the present invention, there is provided a PVS coating apparatus characterized in that a first sprayer for spraying hot water is disposed between the molten salt tank and the wash water tank.

According to another embodiment of the present invention, the upper portion of the washing water tank is provided with a second sprayer for spraying cold water.

According to another embodiment of the present invention, a third sprayer for spraying air is disposed between the washing water tank and the end point lifting bed.

According to another aspect of the present invention, there is provided a PVS coating apparatus, wherein a washing water injector for spraying washing water at a high speed is provided in the washing water tank.

According to another embodiment of the present invention, the view lifting bed and the end point lifting bed are vertically moved by a hydraulic jack installed at the lower portion of the lifting bed.

According to another embodiment of the present invention, there is provided a method of coating an article using the PVS coating apparatus, comprising the steps of: a) connecting a carrier containing an article at a point lifting bed to a chain conveyor; b) preheating the article moved along the chain conveyor at 230 占 폚 for 5 to 6 minutes in a heating furnace; c) when the preheated article is transported to the upper portion of the PVC tank, moving the PVC tank upward with the hydraulic jack so that the article is immersed in the PVC tank, so that the PVC surface is coated on the article surface; d) moving the FV seed tank downward by the hydraulic jack to take the article out of the FV seed tank and stay at the top of the FV seed tank; e) curing the surface of the product coated on the surface of the product with a far-infrared lamp at 60 DEG C for 4 to 5 minutes; f) firing the PVA coated on the surface of the article in a molten salt tank at 195 to 205 ° C for 1 to 2 minutes; g) immersing the article in the wash water tank for 3 to 5 minutes to remove the molten salt on the article surface and to cool the article; h) removing the article from the wash water tank and drying; and i) separating the carrier containing the article from the chain conveyor in the end point lifting bed. The method of coating a PVDF coating using the PVDF coating apparatus is provided.

Since the FV seed coating apparatus according to the present invention moves up and down by the hydraulic jack provided at the lower portion of the FV seed tank, the FV seed coating is uniformly applied to only the desired portion during the application of the coating on the surface of the article Not only the coating thickness of the PVA sol can be easily controlled but also the falling PVA sol after withdrawing the product from the PVA tank can be recovered into the PVA tank without any other means.

Also, there is little risk of damage to the PVS solids during the curing process since the PVS applied to the article undergoes a surface hardening process followed by a plasticizing process in the molten salt.

The molten salt on the surface of the product during the curing process is completely removed through the wash water tank.

1 is a side view of a PV coating apparatus according to the present invention.
FIGS. 2A to 2I are explanatory views for sequentially explaining a PV coating method using the PV coating apparatus.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

The present invention relates to a device for coating a product such as an extension, a mechanism and the like, and a coating method using the coating device.

Fig. 1 is a side view of a PVDF coating apparatus 1 according to the present invention.

A PVC coating apparatus 1 according to the present invention comprises a chain conveyor 10 horizontally installed in the air, a carrier 20 moving along a chain conveyor 10 suspended from the chain conveyor 10, A lifting furnace 40, a PVC tank 50, a far infrared ray lamp 60 (see FIG. 1), and a long infrared ray lamp 60 A molten salt tank 70, a wash water tank 80, and an end point lifting bed 90.

The chain conveyor 10 is an apparatus for conveying a carrier 20 connected to a chain 11 by continuously rotating a chain 11 arranged in a flat annular shape when viewed from the side, So that the articles in the carrier can be passed through the heating furnace 40, the PV tank 50, and the like in the space below the chain conveyor 10 in order to pass the coating process.

The chain conveyor 10 is supported by a plurality of film objects 12 and the like so that the chain conveyor 10 is positioned in the air while being connected to the carrier 20 and the load of the product can be supported, So that the chain conveyor 10 is rotated.

The carrier 20, which serves to transport the article, preferably has fixing means such as a groove in which the article is inserted, a gripper for holding the article so that the article can be fixed without moving in the inner space thereof.

The heating furnace 40, the V-sept tank 50 and the like in the lower space of the chain conveyor 10 will be described in detail below with reference to the coating method.

Figs. 2A to 2I are illustrations showing a method of coating a PVDF coating film using the coating apparatus 1 in order.

A coating method according to the present invention comprises the steps of: a) connecting a carrier (20) containing an article at a point lifting bed (30) to a chain conveyor (10); b) preheating the article moved along the chain conveyor (10) in a heating furnace (40); c) causing the surface of the preheated article to be coated on the surface of the V-septic tank (50); d) allowing the article to stay above the PV tank (50); e) curing the surface of the FVSS coated on the surface of the article with a far-infrared lamp (60); f) curing the PVA coated on the surface of the article in a molten salt tank (70); g) immersing the article in the wash water tank (80) to remove the molten salt on the article surface and to cool the article; h) removing the article from the wash water tank (80) and drying; i) separating the carrier 20, which contains the article, from the end point lifting bed 90 with the chain conveyor 10.

Hereinafter, the coating method will be described in detail for each step, and the structure of the coating apparatus related to each step will be described together.

Before the article is supplied to the coating apparatus 1, the article is preliminarily subjected to a primer treatment process and a water-soluble adhesive, for example, an acrylic adhesive application process. When this preprocessing process is performed, the foreign matter on the surface of the product is removed, and the surface state of the product is excellent in adhesion to the PVA sol. As the adhesive, an oil-based adhesive may be used in addition to the water-soluble adhesive.

a) connecting a carrier (20) to a chain conveyor (10) at a point lifting bed (30); (Fig. 2A)

A chain conveyor (10) is connected to a carrier (20) containing an article so that the goods move along the chain conveyor (10) and pass through the respective steps.

The view lifting bed 30 functions to position the carrier 20 on a predetermined height so that the connection operation between the carrier 20 and the chain conveyor 10 can be easily performed.

A hydraulic jack J is installed below the view lifting bed 30 so that the view lifting bed 30 can be automatically moved up and down.

The hydraulic jack J moves the view lifting bed 30 downward and connects the carrier 20 to the chain conveyor 10 when the carrier 20 loaded on the lifting bed 30 is transported. The bed 30 can be moved upward so that both the carrying operation of the carrier 20 and the connecting operation to the chain conveyor 10 can be easily performed.

b) preheating the article in a heating furnace 40; (Figure 2b)

In order to prevent inhomogeneous application of the PVA sol by the temperature difference between the PVA and the article when the high temperature PVA sol is applied to the article surface, the article is preheated before the application of the PVA sol.

In the heating furnace 40, the article is heated at 230 ° C for 5 to 6 minutes to uniformly heat the inside of the article as well as the inside thereof.

Since the heating furnace 40 circulates hot air to maintain the internal temperature of the heating furnace 40, the heating furnace 40 is opened while the carrier 20 enters or exits the heating furnace 40 and is closed during the preheating operation, So that the outflow of heat to the outside of the heating furnace 40 is minimized.

c) applying PVS sol to the surface of the article in the PVS tank (50); (Fig. 2C)

The article is immersed in the pvc seed in the sol state so that the product can be coated with the pvc-sol.

The product may be completely immersed in the PVA sol according to need, and the PVA cosol may be entirely coated on the surface, or only a part of the product may be partially coated on the surface.

It is possible to immerse the article slowly in the PVS sol, so that the PVS sol can be prevented from bouncing or bending at the bent portion of the article surface, and the time for staying in the PVS sol is set to 15 to 30 seconds, Ensure that V-sol is applied evenly.

Since the process of immersing or removing the article in the PVS sol is performed by moving the PVS tank 50 up and down by operating the hydraulic jack J located at the bottom of the PVS tank 50, The position of the carrier 20 does not change during the process of immersing and unloading the product, so that there is little possibility that the carrier 20 is shaken, thereby allowing the application of the physisurface solely to the desired position of the article, There is no.

The chain conveyor allows the height of the article in the carrier 20 to be lowered by slightly bending downward from the position of the PBT tank 50 as long as the carrier 20 is not shaken so that the PBT tank It is also possible to reduce the degree of height adjustment of the display unit 50.

d) removing the article from the FV seed tank (50) and allowing it to stay above the FV seed tank (50); (Figure 2d)

The article is taken out of the PV tank 50 so that the PVA coated on the surface of the article can undergo a curing process. This step is more important than adjusting the speed of withdrawing the product from the PVS sol and the time of staying at the top of the PVS tank 50, rather than merely connecting the PVS sol application process and the curing process, It makes more sense to adjust the thickness of the coating.

That is, when the thickness of the FV coating is to be increased, the product is taken out slowly to prevent the FVS sol from falling off as much as possible from the surface of the article. If the thickness of the FV coating is to be reduced, It is possible to control the thickness of the PVS coating according to the speed at which the article is taken out by allowing a large amount of PVS sol to fall off from the article surface.

In order to make the thickness of the PVDF coating thinner, the time until the article is taken out of the PVDF tank 50 and before it is hardened can be lengthened so that the PVDF crystal can be further dropped.

As described above, since the FV seed tank 50 is moved up and down to immerse or remove the article in the FV seals, the speed at which the article is taken out can be accurately adjusted by controlling the operation speed of the hydraulic jack J, It is also possible to control the thickness of the V-seed coating precisely.

Since the product remains on the upper surface of the PVR tank 50 even after the product is taken out from the PVR tank 50, the PVR removed from the product is recovered into the PVR tank 50 without a separate apparatus.

e) curing the surface of the VVSS coated on the surface of the article with a far infrared lamp (60); (Figure 2E)

The surface is first cured so as not to damage the PVS sol while undergoing the plastic hardening step prior to the plastic hardening of the PVS coated on the surface of the article.

Since this step is a step of hardening only the surface of the PVS sol, it is conducted by the far-infrared lamp 60 at a low temperature of 60 DEG C for 4 to 5 minutes.

A plurality of far infrared lamps 60 having different directions may be used or a reflector for reflecting the far-infrared rays emitted from one far-infrared lamp 60 may be provided so that the curing can be made entirely on the surface of the photovoltaic cell. It may be located slightly higher than the chain 11 to which the carrier 20 is connected as shown in the figure.

f) scouring the PVA coated on the surface of the article in the molten salt tank (70); (Figure 2f)

The surface of the PVA sol is cured not only to the surface but also to the inside of the PVA sol so that the PVA in a sol state can be a solid PVA having a required strength.

Since the molten salt in the molten salt tank 70 is a low-temperature molten salt such as nitrate, it is very stable at the above-mentioned temperature and has high thermal conductivity. Therefore, There is almost no risk of damage to V-sol and the curing is effectively carried out.

Since the surface of the PVA sol is already cured, there is little possibility of being deformed by the pressure of the molten salt or falling off the surface of the article.

The chain conveyor 10 is bent downward at the position of the molten salt tank 70. Thus, only by operating the chain conveyor 10, the height of the carrier 20 at the position of the molten salt tank 70 can be lowered, and the articles in the carrier 20 can enter the molten salt tank 70.

g) removing the molten salt from the surface of the article in the wash water tank (80) and cooling; (Figure 2g)

The molten salt adhering to the surface of the article is removed during the baking and hardening step, and the article is cooled so as not to be dangerous when carrying the coated article.

Since the article is completely immersed in the wash water, it is possible for the wash water to be removed to the molten salt in all corners of the article.

This step is carried out for 3 to 5 minutes so that the removal and cooling of the molten salt can be carried out sufficiently.

The chain conveyor 10 may be formed to be bent downward from the position of the washing water tank 80 or a hydraulic jack J may be installed below the washing water tank 80 to allow the article to enter and exit the washing water tank 80 So that the washing water tank 80 can be moved up and down.

A first sprayer (not shown) in which hot water is sprayed may be positioned between the molten salt tank 70 and the wash water tank 80.

The first sprayer injects hot water of about 50 ° C. and the product discharged from the molten salt tank 70 at 195 to 205 ° C. immediately enters the washing water tank 80 and cracks the PV coating due to a sudden temperature difference .

In addition, since the molten salt on the surface of the article is primarily removed by the first sprayer, the article can be introduced into the wash water tank 80, so that the number of times of washing water in the wash water tank 80 can be reduced.

A washing water injector (not shown) for injecting washing water at a high speed may be installed in the washing water tank 80.

The wash water injector causes the wash water to flow into the closed tank so that the wash water can reach all the corners of the article and remove the molten salt adhering to the surface of the article.

A second sprayer (not shown) may be located above the wash water tank 80 to discharge cold water.

The washing water in the washing water tank 80 may reach the corners of the article to remove the molten salt, but since the removed molten salt can not be separated, the salt may remain at a low concentration on the surface of the washed article. 2 sprayer can remove this salt.

h) drying the article; (Fig. 2H)

Evaporate the washing water on the surface of the washed article to eliminate the possibility of defects in the article due to moisture and prevent the washing water from deteriorating the workability of packaging and transporting the coated article.

A third sprayer (not shown) for spraying air is positioned between the washing water tank 80 and the end point lifting bed 90 so that the washing water can be rapidly evaporated from the surface of the article.

i) separating the carrier (20) from the end point lifting bed (90) from the chain conveyor (10); 2i)

The product after all the coating process is removed from the coating apparatus.

A hydraulic jack J is provided below the end point lifting bed 90 so as to separate the carrier 20 from the chain conveyor 10 so that the end point lifting bed 90 The carrier lifting bed 90 is positioned at a high height and the end lifting bed 90 is positioned lower when the carrier 20 carrying the article is transported on the end lifting bed 90 so that the carrier 20 can be easily separated and transported.

The coating apparatus according to the present invention is capable of controlling the speed of the chain conveyor 10, the operation of the hydraulic jack J, the heating furnace 40, the various tanks 50, 70 and 80 and the far infrared lamp 60 And a control unit (not shown) for automatically controlling temperature and the like.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. And thus fall within the scope of the present invention.

1: Coating device 10: Chain conveyor
11: chain 20: carrier
30: view lifting bed 40: heating furnace
50: PVT tank 60: Far infrared lamp
70: molten salt tank 80: wash water tank
90: End point lifting bed
J: Hydraulic Jack

Claims

1. A PVA coating apparatus (1) for coating an article with PVA seeds,
A chain conveyor 10 installed horizontally in the air; A carrier (20) which hangs from the chain conveyor (10) and moves along the chain conveyor (10) and transports the articles; The chain conveyor 10 is disposed in the lower space of the chain conveyor 10 in order in a direction in which the chain conveyor 10 moves. The lifting bed 40 preheats the article, A far-infrared ray lamp 60 for curing the surface of the PVA coated on the surface of the article, a molten salt tank (not shown) for firing and hardening the PVA coated on the surface of the article 70), a wash water tank (80) for removing molten salt from the surface of the article, and an end point lifting bed (90) for carrying the article out;
The FV se tank 50 is moved up and down by a hydraulic jack J provided at a lower portion thereof,
Wherein the chain conveyor (10) is bent downward at the position of the molten salt tank (70).

The method according to claim 1,
Wherein the chain conveyor (10) is bent downward at a position of the washing water tank (80).

The method according to claim 1,
Wherein the wash water tank (80) is moved up and down by a hydraulic jack (J) provided at a lower portion thereof.

The method according to claim 1,
Wherein a first sprayer for spraying hot water is disposed between the molten salt tank (70) and the wash water tank (80).

The method according to claim 1,
And a second sprayer for spraying cold water is disposed at an upper portion of the wash water tank (80).

The method according to claim 1,
And a third sprayer for spraying air is disposed between the washing water tank (80) and the end point lifting bed (90).

The method according to claim 1,
Wherein the washing water tank (80) is provided with a washing water injector for injecting wash water at a high speed.

The method according to claim 1,
Wherein the viewpoint lifting bed (30) and the end point lifting bed (90) are vertically moved by a hydraulic jack (J) installed at the lower portion of the lifting bed (30).

9. A method for coating an article using a PVS coating apparatus (1) according to any one of claims 1 to 8,
a) connecting a carrier (20) containing articles at a point lifting bed (30) to a chain conveyor (10);
b) preheating the article moved along the chain conveyor (10) at 230 占 폚 for 5 to 6 minutes in the heating furnace (40);
c) When the preheated article is transferred to the upper portion of the PVC tank (50), the PVC jack (J) moves the PVC tank (50) upward to immerse the article in the PVC tank (50) V-sol to be applied;
d) moving the FV seed tank 50 downward with the hydraulic jack J to take the article out of the FV seed tank 50 and stay on the FV seed tank 50;
e) curing the surface of the coated product on the surface of the article using a far-infrared lamp (60) at 60 DEG C for 4 to 5 minutes;
f) firing the PVA coated on the surface of the article in a molten salt tank (70) at 195 to 205 ° C for 1 to 2 minutes;
g) immersing the article in the wash water tank 80 for 3 to 5 minutes to remove the molten salt on the surface of the article and to cool the article;
h) removing the article from the wash water tank (80) and drying;
i) separating the carrier (20) containing the article from the chain conveyor (10) at the end point lifting bed (90).