KR101032910B1 - Coating workpiece drying method and drying apparatus thereof - Google Patents

Abstract

The present invention is a coating coating booth 60, a near-infrared drying section 80, a top coating booth 70, a far infrared drying section 90, a UV drying section 94 and a composite drying section 98 on a continuous conveying line. ) Is a bottom coating process (S100) to perform a base coating by putting the product to be coated into the bottom coating booth 60 through the transfer line of the coating drying equipment arranged sequentially, the bottom coating booth 60 The first drying process (S200) for drying the near-infrared while transferring the base-coated coated product to the next near-infrared drying section (80), and the coating inside the top coating booth (70) that follows the near-infrared dry section (80) The top coating process of forming a top coat layer on the top surface of the base coating layer by adding a product (S300) and the top coat layer of the product to be coated in the far infrared drying section (90) following the top coat booth (70) The secondary drying process (S400) to adjust, the third drying process (S500) for drying with a UV lamp while transferring the product to be coated in the UV drying section (94), and the combined drying section following the UV drying section (94) It is an object of the present invention to provide a coating drying method and coating drying equipment, characterized in that it comprises a fourth drying process (S600) for drying the coated product in hot air and near infrared rays in 98).

Undercoat coating, 1st drying, top coating, 2nd drying, 3rd drying, 4th drying

Description

Coating drying method and drying apparatus used therein

The present invention relates to a coating drying method and a coating drying equipment used therein, and more particularly, according to drying conditions and drying methods (near infrared drying, far-infrared drying, hot air drying, UV drying) according to various coating operations. By custom design, it is possible to apply various coating works such as UV coating, urethane coating, SF coating, deposit coating by one facility, so that it can be applied to coating drying method and coating drying facility that can dramatically reduce cost and optimize production conditions It is about.

As mobile phones are recognized as a necessity of life and demand is rapidly increasing, mass production is inevitable, therefore, the process of coating the outer surface of the mobile phone case in various colors according to the production order is carried out. You will go through the process.

However, in the case of a spindle line using a far-infrared heater alone, in order to meet the painting drying conditions, the length of the drying furnace is long and a large number of heaters are used. Therefore, there is a disadvantage that a lot of initial equipment cost and equipment space is required. Specifically, when the length of the three booths, the length of the spindle line using the far-infrared heater alone takes about 250m to 300m, and therefore, there is a disadvantage in that it requires a lot of equipment space as well as equipment cost.

In addition, in the case of a facility employing a far-infrared heater alone, a forced drying process is required in addition to the natural drying process of the coating, there is a disadvantage that a separate dryer for forced drying is required, and forced drying for natural drying Since it takes a lot of time to carry out, there is a disadvantage that the output per unit time falls, there is a disadvantage that requires a relatively large number of workers because the dryer moving process is required.

The present invention is to solve the problems described above, the object of the present invention is to reduce the initial installation cost and equipment space, while reducing the drying process, the working time is shortened, the number of workers is required, the production amount per unit time It is an object of the present invention to provide a new coating drying method and a coating drying apparatus used therein, which are improved and can be expected to be efficient.

According to the present invention for realizing this object, the coating composition of the coating coating booth, near-infrared drying section, top coating booth, far-infrared drying section, UV drying section and composite drying section are sequentially arranged on the continuous transfer line. The base coating process is performed by putting the coated product into the undercoat coating booth through the transfer line of a drying facility to perform a base coating on the surface of the coated product, and a near-infrared dry section following the undercoat coating booth. The first drying process of drying the near-infrared while transferring the coated product, and the top coating process of forming a top coat layer on the upper surface of the base coating layer by inserting the coated product into the top coating booth following the near-infrared drying section, and the top coat Far-infrared drying section leading to the booth A second drying process of drying the top coat layer of the coated product with far infrared rays while transmitting, a third drying process of drying the UV coating while transferring the coated product to the UV drying section, and a composite drying section following the UV drying section There is provided a coating drying method and a coating drying equipment used therein, comprising a fourth drying process of transferring the coated product to dry with hot air and near infrared rays.

According to the present invention, it is possible to provide a coating drying method and coating drying equipment having the following effects.

1. Reduction of facility construction cost.

While the spindle line using the existing far infrared heater alone requires a lot of equipment cost and equipment space, the present invention uses a combination of near-infrared and far-infrared hot air heaters, so that the length of the drying furnace needs to be longer to match the painting drying conditions. There is no need, and there is no need to have a painting facility according to the painting characteristics, there is an advantage that a lot of initial installation cost and equipment space is not required.

TABLE 1

Conventional Line (3booth Base) Length 250 ~ 300m Far infrared heater alone Invention line length (3booth reference) 55-70 m Near-infrared, far-infrared, hot air heater combination

2. Effect of increasing drying (heat) efficiency

(1) drying time

As can be seen in Tables 2 and 3 below, the present invention maximizes the thermal efficiency by combining the drying method optimized according to the conditions of the drying conditions of the coating, it can be produced without a separate coating or drying facilities As a result, the production process can be reduced, production time can be shortened, personnel reduction and product quality can be expected.

TABLE 2

Drying method Painting Type Drying time Remarks Conventional Far Infrared Heaty Urethane and SF Painting 30 minutes drying + 3 hours forced drying Separate dryer required Invention Near / far infrared heater + hot air heater Urethane and SF Painting 30 minutes drying, no forced drying 85% time savings

TABLE 3

Drying method Painting Type Production quantity per hour Remarks Conventional Far Infrared Heaty Urethane and SF Painting 1,714 cars Dryer transfer process required (increase in number of people) Invention Near / far infrared heater + hot air heater Urethane and SF Painting 3,000 (approximately 43% increase) No moving process required (reduced staff)

3. Improvement and effect of drying method by section

(1) 1st drying section (primer, 1st base coating drying)-using near infrared heater

The use of far-infrared light requires more than 15 minutes of drying time, which increases power consumption and decreases thermal efficiency. However, the present invention uses the near-infrared light to reduce the time by approximately one third to five minutes of drying time. In addition, the drying section is shortened and a small amount of lamps may be installed, and the effect of using the equipment in a narrow space, as well as the power consumption is reduced and the thermal efficiency is increased.

(2) Secondary Drying Section (UV Leveling Section and Secondary Base Coating Drying)-Use of Far Infrared Heater

-When near-infrared is used, the surface is dried in a short time, and the UV paint applied to the product dries before the film is uniformly formed on the product surface, which may cause appearance defects. However, in the present invention, the internal air temperature is used using far infrared rays. By heating the entire surface, the UV paint has an effect of forming a uniform film.

(3) 3rd drying section (UV drying)-using UV lamp

By adopting the UV lamp used in the prior art, the UV coating uniformly formed in the secondary drying section is cured and dried.

(4) 4th dry section (urethane, SF coated forced dry section)-Use of hot air and near-infrared heater

-When using a hot air dryer is forced to dry up to 3 ~ 4 hours by moving to a separate dryer, the productivity is reduced, the defect is increased during the process movement, the power consumption is also increased, but in the case of the present invention hot air and near infrared Simultaneous use allows all processes to be performed in one facility without a separate drying facility, resulting in a variety of effects such as shortening drying time, reducing defect rate due to process movement, minimizing the process and reducing power consumption, while increasing space utilization. Can give birth to

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. 1 is a flow chart of the coating drying method of the present invention, Figure 2 conceptually showing the structure of the coating drying equipment to perform the coating drying method of the present invention, Figure 3 is to transfer the jig for the coated product Conceptually showing the structure of the transport means.

As shown, the present invention is a coating coating booth 60, near-infrared drying section 80, top coating booth 70, far-infrared drying section 90, UV dry section 94 and on the continuous transfer line Using the coating drying equipment composed of a composite drying section 98 sequentially arranged undercoat coating process (S100), primary drying process (S200), top coating process (S300), secondary drying process (S400) , The coating drying method of sequentially performing the third drying process (S500) and the fourth drying process (S600).

The coating drying apparatus for carrying out the coating drying method of the present invention is a transfer line continuously installed to transfer the coated product, and an undercoat coating booth installed on the transfer line to perform base coating on the surface of the coated product ( 60) and the near-infrared drying section 80 for drying the base coating layer on the surface of the coated product to be transported and installed to be connected to the undercoat coating booth 60 in the near infrared, and the near-infrared drying section 80 to be coated A top coating booth 70 for applying a top coat to the top surface of the base coating layer of the product, a far-infrared drying section 90 for drying the coating layer applied to the surface of the coated product by successively continuing to the next stage of the top coat booth 70, Pico followed by a far infrared drying section 90, followed by a UV drying section 94 for drying the coated product with a UV lamp, and a UV drying section 94. Is arranged to be led to the discharge end of the product is configured to include a combined dryer section 98 for drying the to-be-coated article in a hot air. Reference numerals 10, 12, and 14 denote an antistatic booth, activated carbon, and a nonwoven fabric, respectively.

The transfer line is disposed at both ends of a pair of first road transfer line 20 and the second road transfer line 30 and the first road transfer line 20 and the second road transfer line 30 parallel to each other. The first vertical conveying line 40 and the second vertical conveying line 50 are arranged parallel to each other, the conveying line is configured in a rectangular line shape.

At this time, the undercoat coating booth 60 is installed on the first street transfer line 20 to be coated product of the pair of the first street transfer line 20 and the second street transfer line 30, The near-infrared drying section 80 following the coating booth 60 extends to intersect the longitudinal direction of the first horizontal transfer line 20 and includes at least two near-infrared dry sections 80 parallel to each other. That is, the first near-infrared drying section 80 and the second near-infrared dry section 80 are arranged in parallel with the vertical conveying lines 40 and 50 and at the same time, the first near-infrared dry section 80 and the first near-infrared dry section 80 are formed.

The coated product is continuously conveyed by the conveying means in the conveying line. That is, the conveying means is installed so that the conveying apparatus 110 for conveying the jig 4 for the coated product is connected to the closed loop shape, and at the intersection point of the conveying line for changing the direction of the jig 4 for the coated product. It takes the structure which the guide roll 114 was installed.

In addition, the conveying apparatus 110 is composed of a wire or a chain or caterpillar in the form of a track orbit installed successively along the conveying line, the guide roll 114 is installed at the direction change point of the jig 4 for the coated product of the conveying line By the transfer device 110, such as a wire or chain or caterpillar moves in an endless track, jig (4) for the product to be coated can also be continuously transferred along the transfer line. According to the present invention, the feeder 110 is made of a wire having a caterpillar shape.

The coating drying method of the present invention using the coating drying equipment of this configuration has a undercoat coating process (S100). Undercoat coating process (S100) by installing the undercoat coating booth 60 on the first horizontal transfer line 20 of the first horizontal transfer line 20 and the second horizontal transfer line 30 parallel to each other of the transfer line, The base coating is applied to the surface of the coating product (for example, a mobile phone case) which is introduced into the undercoat coating booth 60. The undercoat coating booth 60 performs a base coating on the surface of the coating product with a primer.

The undercoat process (S100) is then carried out the primary drying process (S200) using the near-infrared while transferring the base-coated coated product to the near-infrared drying section 80 followed by the undercoat coating booth (60). Due to the use of far-infrared, the drying time is needed more than 15 minutes, which increases power consumption and decreases the thermal efficiency.However, when using near-infrared light in the first drying process (S200), the drying time is about 5 minutes at maximum 5 minutes. There is an effect of reducing the time, there is an effect such that a small amount of lamp may be installed while the entire drying section of the coating drying equipment according to the present invention is relatively short.

After the near-infrared drying process (S200), a coating product coated with a primer is added to the coating coating booth 70 to form a coating coating on the upper surface of the base coating layer of the coating product. A top coat layer is formed by UV coating.

Subsequently, in the second drying process S400, the top coat layer of the coated product is dried in far infrared while transferring the coated product to the far-infrared drying section 90 subsequent to the top coat booth 70. That is, a coating product having a top coat layer formed is dried into a far-infrared dry section, which is a secondary drying section 90, and then dried into far-infrared rays. Thus, by heating the entire air temperature by using far-infrared rays, the UV coating is uniform. It has the effect of forming a film. For example, in the second drying process (S400), it can be said that the UV leveling and the second base coating drying process are performed using a far infrared heater.

In the third drying process (S500) following the second drying process (S400), the UV product is continuously dried in the far-infrared drying section 90, and is dried by the UV lamp while transferring the coated product to the drying section 94.

In the fourth drying process (S600) following the tertiary drying process (S500), the yub is transferred to the composite drying section 98 following the drying section 94 to be dried by hot air. At this time, the near-infrared rays are irradiated to the coated product introduced into the composite drying section 98 to dry the coating layer of the coated product with hot air and near-infrared in the composite drying section 98. By using hot air and near-infrared light at the same time, all processes are performed in one facility without a separate drying facility, which increases space utilization, shortens the drying time, reduces the defect rate due to process movement, minimizes the process and reduces power consumption. Can be.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various permutations, modifications, and changes can be made without departing from the spirit of the present invention. It will be apparent to those who have it.

1 is a flow chart of the coating drying method of the present invention

2 is a view conceptually showing the structure of a coating drying apparatus for performing a coating drying method of the present invention;

3 conceptually shows the structure of a conveying means for conveying a jig for a coated product;

Claims (7)

The coating coating booth 60, the near-infrared drying section 80, the top coating booth 70, the far infrared drying section 90, the UV drying section 94, and the composite drying section 98 are sequentially arranged on a continuous conveying line. The coating process (S100) and the near-infrared ray following the undercoat coating booth 70 to put the coated product into the undercoat coating booth 60 through the transfer line of the coating drying facility arranged to perform a base coating. The primary coating process (S200) for drying the near-infrared while transferring the base coated product to the drying section (80), and the coating product is introduced into the top coating booth (70) following the near-infrared drying section (80). The top coating process (S300) to form a top coating layer on the top surface of the base coating layer and the far-infrared drying of the top coating layer of the product to be coated in the far-infrared drying section 90 subsequent to the top coating booth 70 In the secondary drying process (S400), the third drying process (S500) for drying the UV lamp while transferring the product to be coated in the UV drying section (94), and the dry drying section (98) following the UV drying section (94) It includes a fourth drying process (S600) for drying the coated product in hot air and near infrared rays, The transfer line of the coating drying apparatus is configured in a rectangular line shape having a pair of vertical transfer lines 40 and 50 parallel to each other at both ends of a pair of horizontal transfer lines 20 and 30 parallel to each other, the transfer A coating and drying process is performed while the coated product introduced through the input part of the line passes through the pair of horizontal transfer lines 20 and 30 and the vertical transfer lines 40 and 50 arranged in a rectangular line shape. The base coating is applied by putting the coated product into the undercoat coating booth 60 installed on the first horizontal transfer line 20 into which the coated product is put among the pair of horizontal transfer lines 20 and 30. The near-infrared drying section 80 which extends to the undercoat coating booth 60 extends to intersect the longitudinal direction of the first horizontal transfer line 20 and is at least two first near-infrared dry sections 82 and a second side by side. The near-infrared drying section 84, wherein the coated product having the base coating layer formed on the undercoat coating booth 60 has one first near-infrared dry section 82 on one side and a second near-infrared dry section 84 on the other side. Coating drying method, characterized in that to harden the base coating layer of the surface of the product to be coated via a continuous. delete delete A transfer line 20, 30, 40, 50 continuously installed to transfer the coated product, and installed on the transfer lines 20, 30, 40, 50 to apply a base coating on the surface of the coated product. In the near-infrared drying section 80 and the near-infrared drying section 80 which dry the base coating layer on the surface of the coated product to be transported and installed so as to follow the undercoat coating booth 60 and the lower coating booth 70, and the near-infrared drying section 80. Arranged so as to continue to coat the top coat booth 70 to apply a top coat on the upper surface of the base coating layer of the coated product, and to coat the top coat layer applied to the surface of the coated product continuously to the next stage of the top coat booth 70 A UV drying section 94 which is connected to the far infrared drying section 90 and the far infrared drying section 90 to dry the coated product with a UV lamp, and the UV drying section 94 and at the same time Is arranged to be led to the discharge end of the putting product comprises a composite dryer section 98 for drying the to-be-coated article in a hot air and a near infrared, The conveying lines 20, 30, 40, and 50 are a pair of first street conveying line 20 and a second street conveying line 30 parallel to each other, and the first street conveying line 20 and the second street. It is composed of the first longitudinal transfer line 40 and the second longitudinal transfer line 50 disposed at both ends of the transfer line 30 and arranged in parallel with each other, the transfer line (20, 30, 40, 50) is square Consists of shapes, Among the pair of horizontal transfer lines 20 and 30, a bottom coating booth 60 is installed on the first horizontal transfer line 20 into which the coated product is put, and the near-infrared ray continued to the bottom coating booth 60. The drying section 80 includes at least two first near infrared drying sections 82 and a second near infrared drying section 84 extending along the lengthwise direction of the first horizontal transfer line 20 and parallel to each other. The base coating layer on the surface of the coated product is continuously coated on the coated product having the base coating layer on the undercoat coating layer 60 while continuously passing through the first near infrared dry section 82 on one side and the second near infrared dry section 84 on the other side. Coating drying equipment, characterized in that to harden. delete delete The method of claim 4, wherein the transfer line 110 for transferring the jig for the product to be coated 4 is installed to lead to a closed loop shape, the jig for the product to be coated at the intersection of the transfer line ( Coating roll drying equipment, characterized in that the guide roll 114 for changing the direction of 4) is installed.

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