KR100805200B1 - A heating room adiabatic structural of do uv hardening and uv drying apparatus - Google Patents

A heating room adiabatic structural of do uv hardening and uv drying apparatus Download PDF

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KR100805200B1
KR100805200B1 KR1020060125808A KR20060125808A KR100805200B1 KR 100805200 B1 KR100805200 B1 KR 100805200B1 KR 1020060125808 A KR1020060125808 A KR 1020060125808A KR 20060125808 A KR20060125808 A KR 20060125808A KR 100805200 B1 KR100805200 B1 KR 100805200B1
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heating chamber
ultraviolet
wall
heating room
drying apparatus
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KR1020060125808A
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Korean (ko)
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안문찬
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(주)에이엠씨 이엔지
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/28—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/28—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun
    • F26B3/283—Drying solid materials or objects by processes involving the application of heat by radiation, e.g. from the sun in combination with convection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
    • F26B9/06—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

A heating room insulation structure for a UV(ultraviolet) ray hardening and drying apparatus is provided to prevent a burn of a worker and to reduce power consumption by improving insulation efficiency and preheating outside air using partitioning walls installed in zigzag. A heating room insulation structure for a UV ray hardening and drying apparatus including a UV ray lamp and a blower inside the heating room, comprises the followings: an isolation wall(10) forming a heating room of a UV ray hardening and drying apparatus, including an outer wall(12) formed with a blowing hole(12a) at a side connected with the blower(F) to blow outside air, and an inner wall(14) installed inside the outer wall to be separated, with a supply hole(14a) to supply the outside air from the blowing hole to an inside of the heating room; and partitioning walls(20) installed zigzag between the inner and the outer wall, to form an air flowing path. The partitioning wall is bended to a zigzag shape.

Description

자외선경화 및 자외선건조장치의 가열실 단열구조{A heating room adiabatic structural of do UV hardening and UV drying Apparatus}A heating room adiabatic structural of do UV hardening and UV drying Apparatus}

도 1은 본 발명에 따른 자외선경화 및 자외선건조장치의 가열실 단열구조를 전체적으로 나타내는 구성도.1 is a block diagram showing a heat insulation structure of the heating chamber of the ultraviolet curing and ultraviolet ray drying apparatus according to the present invention as a whole.

도 2는 본 발명에 일실시예에 따른 자외선경화 및 자외선건조장치의 가열실 단열구조의 격판구조를 나타내는 요부확대도.Figure 2 is an enlarged view showing the main structure of the diaphragm structure of the heating chamber of the ultraviolet curing and ultraviolet ray drying apparatus according to an embodiment of the present invention.

* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

10: 차단벽 12: 외판 12a: 송풍공DESCRIPTION OF SYMBOLS 10 Barrier wall 12 Outer plate 12a Blower

14: 내판 14a: 투입공 20: 격판14: inner plate 14a: hole 20: diaphragm

22: 통기로 22: By aeration

본 발명은 자외선경화 및 자외선건조장치의 가열실 단열구조에 관한 것으로서, 보다 상세하게는 자외선경화 혹은 자외선건조시 가열실 내부 온도를 일정하게 유지하면서 외부로 열 전달을 차단하여 외벽 과열현상이 방지되는 자외선경화장치의 가열실 단열구조에 관한 것이다. The present invention relates to a heat insulating structure of the heating chamber of the ultraviolet curing and ultraviolet drying apparatus, and more particularly, the heat transfer to the outside while maintaining a constant temperature inside the heating chamber during ultraviolet curing or ultraviolet drying to prevent the external wall overheating phenomenon is prevented A heating chamber insulation structure of an ultraviolet curing device.

통상적으로 자외선경화 및 자외선건조장치는 자외선 램프로부터 발산되는 자외선의 강한 에너지를 이용하여 제품에 도포된 화학물질을 경화 혹은 건조하는 장치로서, 이를 통한 자외선경화나 코팅은 광택, 내마모성, 표면경도, 경화 후의 접착강도 등의 물성이 우수하여 디스플레이산업의 코팅, 실링, 접착 공정에서 많이 응용실시되고 있다.In general, ultraviolet curing and ultraviolet drying device is a device for curing or drying a chemical applied to a product by using the strong energy of ultraviolet rays emitted from an ultraviolet lamp, and the ultraviolet curing or coating through this is glossy, abrasion resistance, surface hardness, curing It is excellent in physical properties such as adhesive strength afterwards, and is widely applied in coating, sealing, and bonding processes of the display industry.

종래에 자외선경화 및 자외선건조장치는 제품이 안착되는 테이블 혹은 컨베이어벨트상에 차단벽을 통하여 구획을 형성하는 가열실이 설치되고, 가열실 내부에 자외선 에너지를 발산하는 자외선 램프와 가열실 내부공기를 환기시키는 환풍기가 구비된다. 이에 가열실 내부에 제품이 안착되거나 컨베이어벨트를 타고 연속적으로 이동시 자외선에 의해 제품이 경화 혹은 건조되면서 환풍기가 내부공기를 순환(예컨대, 배기 및 흡기)시켜 경화 혹은 건조가 보다 빠르게 진행되도록 한다.Conventionally, the ultraviolet curing and ultraviolet drying device is provided with a heating chamber for forming a partition through a blocking wall on a table or a conveyor belt on which a product is mounted, and an ultraviolet lamp for emitting ultraviolet energy inside the heating chamber and air inside the heating chamber. A ventilation fan is provided. Accordingly, when the product is settled inside the heating chamber or continuously moved on the conveyor belt, the product is cured or dried by ultraviolet rays so that the ventilator circulates internal air (for example, exhaust and intake) so that the curing or drying proceeds faster.

그런데, 상기 기술은 제품에 도포된 화합물을 신속하게 자외선경화 및 자외선건조하기 위한 것이나 다음과 같은 문제점이 제기되었다.However, the above technique is for rapidly curing and drying UV-cured compounds applied to a product, but the following problems have been raised.

첫째, 자외선경화 및 자외선건조시 가열실 내부온도가 150도 이상으로 유지됨에 따라 내부열에 의해 차단벽이 고온으로 과열되어 작업자가 화상을 입는 등의 위험을 초래한다.First, as the internal temperature of the heating chamber is maintained at 150 degrees or more during UV curing and UV drying, the barrier wall is overheated to a high temperature by the internal heat, which causes a worker to be burned.

둘째, 차단벽의 외벽과열을 방지하기 위해 차단벽 사이에 단열재를 충진하여 열전달을 차단하고 있지만, 이로 인해 가열실의 부피가 증가함은 물론 자외선경화 및 자외선건조장치를 장시간 가동시 과열누적으로 차단벽의 과열현상이 발생된다.Second, in order to prevent overheating of the outer wall of the blocking wall, heat is blocked by filling the insulating material between the blocking walls. Overheating of walls occurs.

셋째, 자외선경화 및 자외선건조시 외부공기가 환풍기를 통하여 가열실 내부 로 바로 투입되므로 가열실내·외부의 온도차로 인해 가열실 내부온도가 일정하게 유지되지 못하여 제품의 품질이 저하되는 단점이 있다.Third, since the external air is directly injected into the heating chamber through the ventilator during UV curing and ultraviolet drying, the internal temperature of the heating chamber cannot be kept constant due to the temperature difference inside and outside the heating chamber.

넷째, 환풍기를 통한 외부공기 투입에 따른 온도변화를 감안하여 가열실 내부온도를 설정온도 이상으로 유지해야 하므로 전력소비가 필요 이상으로 증대되는 폐단이 따랐다.Fourth, in consideration of the temperature change caused by the input of external air through the ventilator, the internal temperature of the heating chamber should be maintained above the set temperature, resulting in an increase in power consumption more than necessary.

이에 따라 본 발명은 상기한 점에 착안하여 안출한 것으로서, 보다 상세하게는 자외선경화 및 자외선건조작업을 수행하는 중에 작업자가 화상을 입는 등의 안정사고를 예방하기 위해 가열실 차단벽의 단열성을 향상시키고, 특히 자외선경화 및 자외선건조시 투입되는 외부공기와 가열시 내부공기의 온도차를 줄여 저전력으로 가열실 내부온도를 일정하게 유지시키기 위한 자외선경화 및 자외선건조장치의 가열실 단열구조를 제공하기 위한 것을 그 목적으로 한다.Accordingly, the present invention has been made in view of the above point, in more detail, to improve the thermal insulation of the barrier wall of the heating chamber in order to prevent a stable accident, such as a worker burns during the ultraviolet curing and ultraviolet drying operation In particular, to provide a heat insulating structure of the ultraviolet curing and ultraviolet drying device to maintain a constant temperature inside the heating chamber at low power by reducing the temperature difference between the external air input during ultraviolet curing and ultraviolet drying and heating. For that purpose.

이러한 목적을 달성하기 위해 본 발명은 가열실 내부에 자외선 램프와 환풍기가 설치되어 자외선경화 및 자외선건조작업을 수행하는 자외선경화 및 자외선건조장치의 가열실 단열구조에 있어서: 상기 자외선경화 및 자외선건조장치의 가열실(H)을 형성하는 차단벽(10)과, 상기 차단벽(10)은 일단에 송풍기(F)와 연결되어 외부공기가 주입되도록 송풍공(12a)이 형성되는 외판(12)과, 외판(12) 내부에 이격되도록 설치되고 송풍공(12a)을 통하여 주입되는 외부공기가 가열실 내부로 공급되도록 투입공(14a)이 형성되는 내판(14)이 구비되고, 상기 차단벽(10)의 내·외 판(14)(12)사이에 지그재그로 설치되어 통기로(22)를 형성하는 격판(20);을 포함하여 이루어지는 것을 특징으로 한다.In order to achieve the above object, the present invention provides a heat-insulating structure of an ultraviolet curing and ultraviolet drying apparatus in which an ultraviolet lamp and a fan are installed inside a heating chamber to perform ultraviolet curing and ultraviolet drying operation: the ultraviolet curing and ultraviolet drying apparatus. Blocking wall 10 to form a heating chamber (H) of the, and the blocking wall 10 is connected to the blower (F) at one end and the outer plate 12 is formed with a blowing hole (12a) to inject external air and The inner plate 14 is provided to be spaced apart from the inside of the outer plate 12 and the injection hole 14a is formed to supply the outside air injected through the air blowing hole 12a into the heating chamber. And a diaphragm 20 installed in a zigzag between the inner and outer plates 14 and 12 to form a vent 22.

이때, 상기 격판(20)은 지그재그형상으로 절곡되어 통기로(22)가 지그재그형상으로 형성되는 것을 특징으로 한다.At this time, the diaphragm 20 is bent in a zigzag shape is characterized in that the vent 22 is formed in a zigzag shape.

이하, 첨부된 도면을 참조하여 본 발명의 바람직한 실시예를 상세히 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 따른 자외선경화 및 자외선건조장치의 가열실 단열구조를 전체적으로 나타내는 구성도이고, 도 2는 본 발명에 일실시예에 따른 자외선경화 및 자외선건조장치의 가열실 단열구조의 격판구조를 나타내는 요부확대도이다.1 is a configuration diagram showing a heating chamber insulation structure of the ultraviolet curing and ultraviolet drying device according to the present invention as a whole, Figure 2 is a diaphragm structure of the heating chamber insulating structure of the ultraviolet curing and ultraviolet drying device according to an embodiment of the present invention An enlarged view of the main part.

본 발명은 가열실 내부에 자외선 램프(L)와 환풍기(P')가 설치되어 자외선경화 및 자외선건조작업을 수행하는 자외선경화 및 자외선건조장치의 가열실 단열구조에 관련되며, 이때 자외선경화 및 자외선건조장치의 가열실(H)은 도면을 통하여 상세하게 도시되지 않았지만, 화학물질이 도포된 제품(A)이 로딩되는 작업테이블(T) 혹은 이송컨베이어(C)상에 내·외판(14)(12)과 격판(20)으로 구성되어 통기로(22)가 형성되는 차단벽에 의해 구획이 형성되는 것을 특징으로 한다.The present invention relates to a heat-insulating structure of the ultraviolet curing and ultraviolet drying device, which is installed in the heating chamber with an ultraviolet lamp (L) and a fan (P ') to perform ultraviolet curing and ultraviolet drying, wherein the ultraviolet curing and ultraviolet Although the heating chamber H of the drying apparatus is not shown in detail through the drawings, the inner and outer plates 14 (on the work table T or the conveying conveyor C, into which the product A coated with chemicals is loaded) ( 12) and the diaphragm 20 is characterized in that the partition is formed by a barrier wall in which the air passage 22 is formed.

본 발명에 따른 차단벽(10)은 자외선경화 및 자외선건조장치(U)의 가열실(H)을 형성하는바, 여기서 차단벽(10)은 일단에 송풍기(F)와 연결되어 외부공기가 주입되도록 송풍공(12a)이 형성되는 외판(12)과, 외판(12) 내부에 이격되도록 설치되고 송풍공(12a)을 통하여 주입되는 외부공기가 가열실 내부로 공급되도록 투입공(14a)이 형성되는 내판(14)이 구비된다.Barrier wall 10 according to the present invention forms the heating chamber (H) of the ultraviolet curing and ultraviolet ray drying apparatus (U), where the barrier wall 10 is connected to the blower (F) at one end to inject external air The outer plate 12 is formed so that the blowing hole 12a is formed, and the injection hole 14a is formed so as to be spaced apart from the inside of the outer plate 12 and the outside air injected through the blowing hole 12a is supplied into the heating chamber. An inner plate 14 is provided.

차단벽(10)은 도 1에 도시된 바와 같이 가열실(H)의 측벽과 상부벽이 구분되도록 형성되거나 도면을 통하여 도시하지 않았지만 측벽과 상부벽이 연통되도록 일체로 형성된다.As shown in FIG. 1, the blocking wall 10 is formed so that the side wall and the upper wall of the heating chamber H are separated from each other, or are integrally formed so that the side wall and the upper wall communicate with each other.

차단벽(10)은 내·외판(14)(12)이 이격되도록 설치되고, 외판(12)에 송풍공(12a)을 통하여 외부공기가 내·외판(14)(12)사이의 이격된 공간으로 주입되면 후술하는 통기로(22)를 타고 이송되어 내판(14)의 투입공(14a)을 통하여 가열실(H) 내부로 공급된다. 이때 가열실의 측벽에 구비되는 투입공(14a)은 제품(A)이 안착된 작업테이블(T) 혹은 이송컨베이어(C)에 인접하도록 내판(14)의 하단부에 형성되고, 상부벽에 구비되는 투입공(14a)은 전면에 걸쳐 고르게 형성된다.The blocking wall 10 is installed so that the inner and outer plates 14 and 12 are spaced apart from each other, and the space between the inner and outer plates 14 and 12 is separated from the outside air through the blow holes 12a. Injected into the aeration passage 22 to be described later is supplied to the inside of the heating chamber (H) through the injection hole (14a) of the inner plate (14). In this case, the injection hole 14a provided in the side wall of the heating chamber is formed at the lower end of the inner plate 14 so as to be adjacent to the work table T or the transfer conveyor C on which the product A is seated, and is provided on the upper wall. The injection hole 14a is formed evenly over the front surface.

이에 가열실(H) 측벽 내판(14)을 통하여 공급되는 외부공기는 가열실(H) 하부에서 상부로 이동되어 상부벽에 설치된 환풍기(P')를 통하여 외부로 배출되므로 가열실 내부의 공기순환이 신속하게 이루어진다.Accordingly, the outside air supplied through the inner wall 14 of the side wall of the heating chamber H is moved upward from the lower side of the heating chamber H and discharged to the outside through the fan P ′ installed on the upper wall, thereby circulating the air inside the heating chamber. This is done quickly.

또한, 본 발명에 따른 격판은 차단벽(10)의 내·외판(14)(12)사이에 지그재그로 설치되어 통기로(22)가 형성된다. 격판(20)은 내·외판(14)(12)사이의 공간부에 일정한 간격으로 이격되도록 복수로 설치되되, 이때 격판(20)은 도 1에 도시된 바와 같이 일단이 개방되도록 설치되면 그와 대응하는 격판(20)은 다른 일단이 개방되도록 설치되어 통기로(22)가 지그재그형상으로 형성된다.In addition, the diaphragm according to the present invention is installed in a zigzag between the inner and outer plates 14, 12 of the blocking wall 10, the vent 22 is formed. The diaphragm 20 is installed in plural so as to be spaced apart at regular intervals in the space portion between the inner and outer plates 14, 12, wherein the diaphragm 20 is installed so that one end is opened as shown in FIG. The corresponding diaphragm 20 is installed so that the other end is open, and the air passage 22 is formed in a zigzag shape.

이에 송풍공(12a)을 통하여 공급되는 외부공기가 통기로(22)를 따라 지그재그로 이송되어 가열실(H) 내부로 공급되는바, 이때 복수의 격판(20)은 가열실(H) 내부에서 외부로 전달되는 열을 순차적으로 차단함과 더불어 통기로(22)를 따라 이 송되는 외부공기에 열을 빼앗겨 열을 방출하는 방열판 역할 수행하므로 가열실(H)의 외벽 과열현상이 방지된다.Accordingly, the outside air supplied through the air blowing hole 12a is zigzag along the air passage 22 and is supplied into the heating chamber H. In this case, the plurality of diaphragms 20 are inside the heating chamber H. In addition to blocking the heat transmitted to the outside in order to take out the heat to the outside air transferred along the air passage 22 serves as a heat sink to release the heat to prevent overheating of the outer wall of the heating chamber (H).

즉, 순환공기가 통기로(22)를 따라 가열실(H) 내부로 이송되는 중에 격판(20)에서 방출되는 열에 의해 히팅되면서 공급되므로 투입공(14a)을 통하여 가열실(H) 내부로 투입되는 직전에는 가열실(H) 내부온도와 편차가 심하지 않아 필요이상의 고전력을 투입하지 않더라도 가열실(H) 내부온도가 일정하게 유지되므로 자외선경화 및 자외선건조작업시 제품(A)의 품질이 향상되는 이점이 있다.That is, since the circulating air is supplied while being heated by the heat emitted from the diaphragm 20 while being transferred into the heating chamber H along the air passage 22, the circulating air is supplied into the heating chamber H through the injection hole 14a. The temperature of the product (A) is improved during UV curing and UV drying work because the internal temperature of the heating chamber (H) is kept constant even if high power is not inputted. There is an advantage.

이때, 상기 격판(20)은 지그재그형상으로 절곡되어 통기로(22)가 지그재그형상으로 형성된다. 이는 도 2처럼 송풍공(12a)을 통하여 투입되는 외부공기를 보다 장기간 걸쳐 통기로(22)에 머물게 함은 물론 격판(20)을 통한 방열면적이 증대되어 히팅효율 향상과 더불어 외부로의 열방출을 차단하는 단열성이 향상되는 이점이 있다.At this time, the diaphragm 20 is bent in a zigzag shape so that the air passage 22 is formed in a zigzag shape. This not only keeps the external air introduced through the air blowing hole 12a in the air passage 22 for a longer period of time, but also increases the heat dissipation area through the diaphragm 20 to improve heating efficiency and heat release to the outside. There is an advantage that the thermal insulation to block the.

이상의 구성 및 작용에 의하면, 본 발명은 외부공기가 가열실 내부로 투입되는 중에 히팅되어 필요이상의 고전력을 투입하지 않더라도 가열실 내부온도가 일정하게 유지되는 효과가 있다.According to the above configuration and operation, the present invention has the effect that the internal temperature of the heating chamber is kept constant even if the external air is heated while being introduced into the heating chamber, and the high power is not input more than necessary.

또한, 복수의 격판이 가열실 내부에서 외부로 전달되는 열을 순차적으로 차단함과 더불어 통기로를 따라 이송되는 외부공기에 열을 빼앗겨 가열실 외벽 과열현상이 방지되는 유용한 효과가 있다.In addition, the plurality of diaphragm has a useful effect of sequentially blocking the heat transferred from the inside of the heating chamber to the outside air is transferred to the outside air transferred along the air passage to prevent overheating of the outer wall of the heating chamber.

Claims (2)

가열실 내부에 자외선 램프와 환풍기가 설치되어 자외선경화 및 자외선건조작업을 수행하는 자외선경화 및 자외선건조장치의 가열실 단열구조에 있어서:In the heating chamber insulation structure of the ultraviolet curing and ultraviolet drying device in which the ultraviolet lamp and the ventilator are installed inside the heating chamber to perform ultraviolet curing and ultraviolet drying operation: 상기 자외선경화 및 자외선건조장치의 가열실(H)을 형성하는 차단벽(10)과,A barrier wall 10 for forming a heating chamber H of the UV curing and UV drying apparatus; 상기 차단벽(10)은 일단에 송풍기(F)와 연결되어 외부공기가 주입되도록 송풍공(12a)이 형성되는 외판(12)과, 외판(12) 내부에 이격되도록 설치되고 송풍공(12a)을 통하여 주입되는 외부공기가 가열실 내부로 공급되도록 투입공(14a)이 형성되는 내판(14)이 구비되고,The blocking wall 10 is connected to the blower (F) at one end and the outer plate 12 is formed so that the blowing hole (12a) is formed so that the external air is injected, and is installed to be spaced apart inside the outer plate 12 and the blowing hole (12a) The inner plate 14 is provided with an injection hole 14a is formed so that the external air is injected through the inside of the heating chamber, 상기 차단벽(10)의 내·외판(14)(12)사이에 지그재그로 설치되어 통기로(22)를 형성하는 격판(20);을 포함하여 이루어지는 것을 특징으로 하는 자외선경화 및 자외선건조장치의 가열실 단열구조.Of the ultraviolet curing and ultraviolet drying device, comprising: a diaphragm 20 installed in a zigzag between the inner and outer plates 14 and 12 of the blocking wall 10 to form an air passage 22. Heating chamber insulation structure. 제 1항에 있어서,The method of claim 1, 상기 격판(20)은 지그재그형상으로 절곡되는 것을 특징으로 하는 자외선경화 및 자외선건조장치의 가열실 단열구조.The diaphragm 20 is a heat insulation structure of the heating chamber of the ultraviolet curing and ultraviolet drying device, characterized in that bent in a zigzag shape.
KR1020060125808A 2006-12-11 2006-12-11 A heating room adiabatic structural of do uv hardening and uv drying apparatus KR100805200B1 (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10160341A (en) * 1996-11-28 1998-06-19 Mieko Takahashi Tooth brush drier

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10160341A (en) * 1996-11-28 1998-06-19 Mieko Takahashi Tooth brush drier

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
일본공개특허공보 평10-160341호

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