KR102282900B1 - Radio Wave Penetration Cover Manufacturing Method - Google Patents

Radio Wave Penetration Cover Manufacturing Method Download PDF

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Publication number
KR102282900B1
KR102282900B1 KR1020190129304A KR20190129304A KR102282900B1 KR 102282900 B1 KR102282900 B1 KR 102282900B1 KR 1020190129304 A KR1020190129304 A KR 1020190129304A KR 20190129304 A KR20190129304 A KR 20190129304A KR 102282900 B1 KR102282900 B1 KR 102282900B1
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South Korea
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cover member
top cover
layer
resin
bottom cover
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KR1020190129304A
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Korean (ko)
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KR20210045821A (en
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김호중
이시욱
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주식회사 서연이화
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Priority to KR1020190129304A priority Critical patent/KR102282900B1/en
Priority to CN202011102522.4A priority patent/CN112677402B/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/16—Making multilayered or multicoloured articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0001—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor characterised by the choice of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2069/00—Use of PC, i.e. polycarbonates or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3055—Cars
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
    • G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
    • G01S2013/9321—Velocity regulation, e.g. cruise control

Abstract

본 발명은 수지 사출시 탑커버부재와 버텀커버부재의 접착성 및 접착강도를 향상시킬 수 있는 레이더 전파 투과형 커버 제조방법에 관한 것이다.The present invention relates to a method of manufacturing a radar wave transmission type cover capable of improving the adhesiveness and adhesive strength between a top cover member and a bottom cover member during resin injection.

Description

레이더 전파 투과형 커버 제조방법{Radio Wave Penetration Cover Manufacturing Method}Radar wave penetration type cover manufacturing method {Radio Wave Penetration Cover Manufacturing Method}

본 발명은 레이더 전파 투과형 커버 제조방법에 관한 것이다.The present invention relates to a method for manufacturing a radar transmission type cover.

스마트 크루즈 컨트롤(SCC; Smart Cruise Control)이란 레이더 센서를 이용하여 전방 차량을 감지하여 선행 차량이 존재하면 선행 차량과의 특정 거리를 유지하며 주행하는 추종 기능과 선행 차량이 존재하지 않으면 특정 속도로 주행하는 설정 속도 주행 기능을 모두 갖춘 크루즈 컨트롤(Cruise Control)의 발전된 형태이다.Smart Cruise Control (SCC) uses a radar sensor to detect a vehicle in front and maintains a specific distance from the preceding vehicle when a preceding vehicle is present. It is an advanced form of cruise control with all set speed driving functions.

스마트 크루즈 컨트롤는 적응적 크루즈 컨트롤(ACC: Adaptive Cruise Control)이라고도 한다.Smart cruise control is also called adaptive cruise control (ACC).

스마트 크루즈 컨트롤은 엔진 제어 유닛과 전자식 제동 유닛을 이용하여 차량의 가감속을 자동화하여 운전자의 편의성 향상과 더불어 전방 충돌의 위험 또한 감소할 수 있는 효과를 지닌 대표적인 운전자 보조/지원 시스템이다.Smart cruise control is a representative driver assistance/assistance system that uses the engine control unit and electronic braking unit to automate the acceleration and deceleration of the vehicle, thereby improving the driver's convenience and reducing the risk of forward collision.

이러한 시스템의 핵심이 되는 SCC 레이더는 차량의 전방 중앙에 설치하는 것이 성능 확보 측면에서 가장 유리한데, 이러한 차량 전방 중앙에는 통상적으로 라디에이터 그릴이나, 자동차 제조 회사의 앰블럼 또는 장식물 등이 위치하는 경우가 많다.It is most advantageous to install the SCC radar, which is the core of such a system, in the front center of the vehicle in terms of securing performance, and in the center of the front of the vehicle, a radiator grill or an automobile manufacturer's emblem or decoration is usually located in many cases. .

일반적으로 라디에이터 그릴은 금속 또는 플라스틱으로 제조되고, 크롬으로 다시 도금을 하여, 외부의 환경으로부터 발생하는 부식을 방지하게 된다.In general, a radiator grill is made of metal or plastic, and plated with chrome again to prevent corrosion from external environments.

그러나 금속은 전파 투과성이 낮기 때문에 SCC 레이더의 전파 송수신에 악영향을 미치게 된다.However, since metal has low radio wave permeability, it adversely affects radio wave transmission and reception of SCC radar.

따라서, 전파 송수신이 원활하게 이루어질 수 있도록 라디에이터 그릴의 일부 영역을 별도의 레이더 커버로 대체하여 전파 투과성을 확보하는 방법이 시도되어 왔다.Therefore, a method of securing radio wave transmittance by replacing a partial area of the radiator grill with a separate radar cover has been attempted so that radio wave transmission and reception can be performed smoothly.

한국 등록특허공보 제2018-0055983호(이하 종래기술 1)은 차량용 전파 투과 부재 제조방법에 관한 것이다.Korean Patent Publication No. 2018-0055983 (hereinafter referred to as prior art 1) relates to a method of manufacturing a radio wave transmitting member for a vehicle.

종래기술 1의 배경기술에 언급된 바와 같이, 전파 투과 부재(10)는 기재층(1) 표면의 적어도 일부에 금속층(2)을 증착한 다음, 플라스틱 부재의 커버층(3)을 사출하여, 기재층(1) 및 커버층(3)이 접합된 형태로 형성하게 된다.As mentioned in the background art of prior art 1, the radio wave transmitting member 10 is formed by depositing a metal layer 2 on at least a part of the surface of the base layer 1, and then injecting the cover layer 3 of the plastic member, The base layer 1 and the cover layer 3 are formed in a bonded form.

일반적으로 PC 재질의 기재층(1) 및 ASA 재질의 커버층(3)은 인서트 사출에 의해 두 부재가 금속층(2)을 포함하여 이루어지는 필름 층을 사이에 두고 결합한다.In general, the base layer 1 made of a PC material and the cover layer 3 made of an ASA material are bonded to each other with a film layer including the metal layer 2 between the two members by insert injection.

이를 보다 구체적으로 설명하면 다음과 같다.This will be described in more detail as follows.

(1) 금속층(2)을 포함하여 이루어지는 필름 층의 상면에 PC 재질의 기재층(1)을 사출한다.(1) The base material layer (1) made of PC material is injected onto the upper surface of the film layer including the metal layer (2).

(2) PC 재질의 기재층(1) 표면온도를 80도 이하로 냉각을 한다.(2) Cooling the surface temperature of the PC material layer (1) to 80 degrees or less.

(3) 냉각된 PC 재질의 기재층(1)을 금형에 인서트한 후, 금속층(2)을 포함하여 이루어지는 필름 층의 배면에 ASA 재질의 커버층(3)을 사출한다.(3) After inserting the cooled PC material base layer 1 into the mold, the ASA material cover layer 3 is injected on the back surface of the film layer including the metal layer 2 .

이때 2차로 ASA 사출시 ASA 수지 온도에 의하여 PC 기재층은 유동천이 온도에 도달하지 못하므로, 기재층(1)과 커버층(3) 사이의 경계면이 활성화되지 못한다.At this time, since the PC base layer does not reach the fluid transition temperature due to the ASA resin temperature during the second ASA injection, the interface between the base layer 1 and the cover layer 3 is not activated.

또한, 2차로 ASA 사출시에는 PC 기재층의 열응력의 중심이 크게 변화되지 않는다.In addition, the center of the thermal stress of the PC base layer does not change significantly during ASA injection as a secondary.

종래기술에 의하면, PC 기재층(1)의 표면이 냉각된 상태에서 ASA 사출 시 PC의 표면이 활성화되지 않아서 기재층(1)과 커버층(3) 간의 접착성이 저하된다.According to the prior art, the surface of the PC is not activated during ASA injection while the surface of the PC base layer 1 is cooled, so that the adhesion between the base layer 1 and the cover layer 3 is reduced.

ASA와 PC 사이의 강한 열응력 작용에 따라 접착성 및 접착강도의 저하가 초래된다는 단점이 존재한다.There is a disadvantage in that adhesion and adhesive strength are deteriorated due to the strong thermal stress action between ASA and PC.

즉, PC의 열응력 중심(1')과 ASA의 열응력 중심(3') 간의 거리가 가까워지지 않으므로, 레이더 전파 투과형 커버의 냉각 수축 과정에서 기재층(1)과 커버층(3) 사이에 높은 인장력이 발생, 접착성이 저하된다.That is, since the distance between the thermal stress center (1') of the PC and the thermal stress center (3') of the ASA does not become close, in the cooling and shrinking process of the radar wave transmission type cover, between the base layer 1 and the cover layer 3 A high tensile force is generated, and adhesiveness is lowered.

한국 등록특허공보 제2018-0055983호Korean Patent Publication No. 2018-0055983

본 발명은 전술한 문제점을 극복하기 위한 것으로 탑커버 부재와 버텀커버 부재 간의 접착 강도를 증가시킬 뿐만 아니라, 접착면에 발생하는 잔류응력을 해소할 수 있는 레이더 전파 투과형 커버 제조방법을 제공하는 것이다.An object of the present invention is to provide a method for manufacturing a radar wave transmission type cover capable of not only increasing the adhesive strength between a top cover member and a bottom cover member, but also resolving residual stress generated on an adhesive surface.

전술한 목적을 달성하기 위하여, 본 발명은 인쇄층, 인쇄보호층, 인듐 증착층, 인듐 보호층이 형성된 메인 필름층을 준비하는 단계; 상기 메인 필름층의 상면에 PC 수지를 사출하여 탑커버부재를 형성하는 제1단계; 상기 제1단계에서 사출된 PC 수지의 표면이 섭씨 100도~140도일 때, 상기 메인필름층의 배면에 ASA 수지를 사출하여 버텀커버부재를 형성하는 제2단계를 포함하되, 상기 제2단계에서는, 섭씨 255도의 고온의 상기 ASA 수지로부터 상기 탑커버부재로 열전달이 되면, 상기 탑커버부재가 유동 천이 온도(섭씨 155도)에 도달하여 상기 탑커버부재와 상기 버텀커버부재 간의 경계면이 활성화되어, 상기 PC수지와 ASA 수지 간의 접착력이 상승하고, 상기 탑커버부재의 열응력의 중심(110)이 상기 버텀커버부재 측으로 이동하여 상기 탑커버부재의 열응력의 중심(110)과 상기 버텀커버부재의 열응력의 중심(210)이 가까워져서, 냉각 수축 시 상기 탑커버부재와 버텀커버부재의 경계면에 인장력이 작용하는 것을 방지하여 전체적으로 고르게 냉각 수축할 수 있는 것을 특징으로 한다.In order to achieve the above object, the present invention comprises the steps of preparing a main film layer in which a printed layer, a print protective layer, an indium deposition layer, and an indium protective layer are formed; A first step of forming a top cover member by injecting PC resin on the upper surface of the main film layer; When the surface of the PC resin injected in the first step is 100 to 140 degrees Celsius, a second step of injecting an ASA resin to the rear surface of the main film layer to form a bottom cover member, wherein in the second step , when heat is transferred from the ASA resin at a high temperature of 255 degrees Celsius to the top cover member, the top cover member reaches a flow transition temperature (155 degrees Celsius) and the interface between the top cover member and the bottom cover member is activated, The adhesive force between the PC resin and the ASA resin increases, and the center of thermal stress 110 of the top cover member moves toward the bottom cover member, so that the center of thermal stress 110 of the top cover member and the bottom cover member As the center of thermal stress 210 approaches, it is characterized in that the tensile force is prevented from acting on the interface between the top cover member and the bottom cover member during cooling and shrinkage, so that the whole can be cooled and contracted evenly.

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본 발명의 일 실시례에 따른 레이더 전파 투과형 커버 제조방법은 다음과 같은 효과를 가질 수 있다.The radar transmission type cover manufacturing method according to an embodiment of the present invention may have the following effects.

(1) PC 재질의 탑커버부재가 냉각되기 전 ASA 재질의 버텀커버부재 사출시 PC의 표면이 활성화되며, PC의 유동 천이온도에 쉽게 도달할 수 있어, 부재간의 접착성이 향상된다.(1) When the ASA material bottom cover member is injected before the PC material top cover member is cooled, the surface of the PC is activated, and the flow transition temperature of the PC can be easily reached, thereby improving the adhesion between the members.

(2) ASA와 PC 사이의 열응력 중심이 좁아져서 열응력에 따른 접착성 및 접착강도가 개선된다.(2) The center of thermal stress between ASA and PC is narrowed, so the adhesiveness and adhesive strength according to thermal stress are improved.

도면 1은 종래기술에 의한 레이더 전파 투과형 커버의 탑커버부재의 단면개략도
도면 2는 종래기술에 의한 레이더 전파 투과형 커버의 탑커버부재와 버텀커버부재의 단면 개략도
도면 3은 본 발명에 의한 레이더 전파 투과형 커버의 탑커버부재의 단면개략도
도면 4는 본 발명에 의한 레이더 전파 투과형 커버의 탑커버부재와 버텀커버부재의 단면 개략도
도면 5는 냉각시 탑커버부재의 열응력의 중심의 이동을 도시한 개략도
도면 6은 본 발명에 의한 레이더 전파 투과형 커버 제조방법의 순서도1 is a cross-sectional schematic view of a top cover member of a radar radio wave transmission type cover according to the prior art;
Figure 2 is a schematic cross-sectional view of the top cover member and the bottom cover member of the radar radio wave transmission type cover according to the prior art;
3 is a cross-sectional schematic view of the top cover member of the radar wave transmission type cover according to the present invention;
4 is a cross-sectional schematic view of the top cover member and the bottom cover member of the radar radio wave transmission type cover according to the present invention;
5 is a schematic diagram showing the movement of the center of thermal stress of the top cover member during cooling
6 is a flowchart of a method for manufacturing a radar radio wave transmission type cover according to the present invention;

이하, 첨부된 도면을 참조하여 본 발명에 따른 바람직한 실시 예를 상세히 설명하기로 한다. 이에 앞서, 본 명세서 및 청구범위에 사용된 용어나 단어는 통상적이거나 사전적인 의미로 한정해서 해석되어서는 아니 되며, 발명자는 그 자신의 발명을 가장 최선의 방법으로 설명하기 위해 용어의 개념을 적절하게 정의할 수 있다는 원칙에 입각하여, 본 발명의 기술적 사상에 부합하는 의미와 개념으로 해석되어야만 한다.Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms or words used in the present specification and claims should not be construed as being limited to their ordinary or dictionary meanings, and the inventor should properly understand the concept of the term in order to best describe his invention. Based on the principle that can be defined, it should be interpreted as meaning and concept consistent with the technical idea of the present invention.

본 발명인 레이더 전파 투과형 커버의 제조방법의 바람직한 실시례는 다음과 같다.A preferred embodiment of the method for manufacturing a radar radio wave transmission type cover according to the present invention is as follows.

(1) 메인 필름층(300)을 준비한다.(1) Prepare the main film layer 300 .

이하의 설명에서 편의상 메인 필름층(300)은 인쇄층(320),인쇄보호층(340), 인듐 증착층(360), 인듐 보호층(380)이 형성된 필름을 의미한다. In the following description, for convenience, the main film layer 300 means a film on which the printed layer 320 , the printed protective layer 340 , the indium deposition layer 360 , and the indium protective layer 380 are formed.

이를 메인 필름층 준비 단계라 한다.(S1 단계)This is called the main film layer preparation step. (Step S1)

(2) 메인 필름층의 상면(305)에 수지를 사출한다.(2) The resin is injected into the upper surface 305 of the main film layer.

이를 제1단계(S2 단계)라 하며, 메인 필름층의 상면(305)에 사출된 수지는 탑커버부재(100)를 형성한다.This is called a first step (step S2), and the resin injected onto the upper surface 305 of the main film layer forms the top cover member 100 .

이때, 탑커버부재(100)의 열응력의 중심은 도 3에 도시한 바와 같이 분포된다.At this time, the center of the thermal stress of the top cover member 100 is distributed as shown in FIG.

(3) 제1단계(S1 단계)에서 사출된 수지의 표면이 섭씨 100도~140도일 때, 메인 필름층의 배면(310)에 수지를 사출하며, 이를 제2단계(S3 단계)라 한다.(3) When the surface of the resin injected in the first step (step S1) is 100 to 140 degrees Celsius, the resin is injected into the back surface 310 of the main film layer, which is referred to as the second step (step S3).

메인 필름층의 배면(310)에 사출된 수지는 버텀커버부재(200)를 형성한다.The resin injected on the rear surface 310 of the main film layer forms the bottom cover member 200 .

S3 단계에 의하면 다음과 같은 현상이 일어난다.According to step S3, the following phenomenon occurs.

1) 먼저, 2차로 사출되는 고온의 ASA 수지(섭씨 약 255도)으로부터 탑커버부재(100)로 열전달이 일어난다.1) First, heat transfer occurs from the secondly injected high-temperature ASA resin (about 255 degrees Celsius) to the top cover member 100 .

따라서, 탑커버부재(100)는 쉽게 유동천이 온도에 도달할 수 있으므로, 탑커버부재(100)와 버텀커버부재(200) 간의 경계면이 활성화된다.Accordingly, since the top cover member 100 can easily reach the flow transition temperature, the interface between the top cover member 100 and the bottom cover member 200 is activated.

참고로, 탑커버부재(100)를 이루는 PC 수지의 유동 천이온도는 섭씨 155도이다.For reference, the flow transition temperature of the PC resin constituting the top cover member 100 is 155 degrees Celsius.

탑커버부재(100)와 버텀커버부재(200) 간의 경계면(250)이 활성화되므로, PC와 ASA 부재 간의 접착력이 상승한다.Since the interface 250 between the top cover member 100 and the bottom cover member 200 is activated, the adhesive force between the PC and the ASA member increases.

2) 두번째로, 2차로 사출되는 고온의 ASA 수지(섭씨 약 255도)으로부터 탑커버부재(100)로 전달된 열로 인해 탑커버부재의 열응력의 중심(110)이 버텀커버부재(200) 측으로 이동한다.(도 5 참조)2) Second, due to the heat transferred to the top cover member 100 from the secondly injected high-temperature ASA resin (about 255 degrees Celsius), the center of thermal stress 110 of the top cover member is directed toward the bottom cover member 200. move. (See Fig. 5)

즉, 탑커버부재의 열응력의 중심(110)과 버텀커버부재의 열응력의 중심(210)이 가까워진다.That is, the center of the thermal stress 110 of the top cover member and the center 210 of the thermal stress of the bottom cover member are closer.

두 부재의 열응력의 중심(110, 210)이 서로 가까워지므로, 레이더 전파 투과형 커버(1)가 냉각 수축 시, 탑커버부재와 버텀커버부재의 경계면(250)에 인장력이 작용하는 것을 방지할 수 있으며, 레이더 전파 투과형 커버(1)는 전체적으로 고르게 냉각되며 수축할 수 있다.Since the centers 110 and 210 of the thermal stress of the two members are close to each other, when the radar wave transmission type cover 1 is cooled and contracted, it is possible to prevent the tensile force from acting on the interface 250 between the top cover member and the bottom cover member. And, the radar wave transmission type cover 1 can be cooled and contracted evenly as a whole.

본 발명인 레이더 전파 투과형 커버의 제조방법의 다른 실시례는 제1단계의 수지는 PC 재질이며, 제2단계의 수지는 ASA 재질이다.Another embodiment of the method of manufacturing a radar transmission type cover according to the present invention is that the resin of the first step is a PC material, and the resin of the second step is an ASA material.

레이더 전파 투과형 커버의 제조방법에 의하면 (1) 탑커버부재와 버텀커버부재 사이의 경계면을 활성화하여, 부재 간의 접착력을 상승시키며 (2) 레이더 전파 투과형 커버 냉각 수축 시, 부재 간 접착강도를 향상시켜, 냉각 수축 단계에서 경계면이 서로 벌어질 가능성을 현저히 감소한다.According to the manufacturing method of the radar transmission type cover, (1) the interface between the top cover member and the bottom cover member is activated to increase the adhesive force between the members, and (2) the radar transmission type cover improves the adhesive strength between the members during cooling and shrinkage. , it significantly reduces the possibility that the interfaces will open each other during the cooling and shrinkage phase.

1:레이더 전파 투과형 커버 100:탑커버부재
110:탑커버부재의 열응력 중심 200:버텀커버부재
210:버텀커버부재의 열응력 중심
250:탑커버부재와 버텀커버부재의 경계면
300:메인 필름층 305:메인 필름층의 상면
310:메인 필름층의 배면1: radar radio wave transmission type cover 100: top cover member
110: center of thermal stress of the top cover member 200: bottom cover member
210: center of thermal stress of the bottom cover member
250: the interface between the top cover member and the bottom cover member
300: main film layer 305: upper surface of the main film layer
310: the back of the main film layer

Claims (2)

인쇄층, 인쇄보호층, 인듐 증착층, 인듐 보호층이 형성된 메인 필름층을 준비하는 단계;
상기 메인 필름층의 상면에 PC 수지를 사출하여 탑커버부재를 형성하는 제1단계;
상기 제1단계에서 사출된 PC 수지의 표면이 섭씨 100도~140도일 때, 상기 메인필름층의 배면에 ASA 수지를 사출하여 버텀커버부재를 형성하는 제2단계를 포함하되,
상기 제2단계에서는,
섭씨 255도의 고온의 상기 ASA 수지로부터 상기 탑커버부재로 열전달이 되면,
상기 탑커버부재가 유동 천이 온도(섭씨 155도)에 도달하여 상기 탑커버부재와 상기 버텀커버부재 간의 경계면이 활성화되어, 상기 PC수지와 ASA 수지 간의 접착력이 상승하고,
상기 탑커버부재의 열응력의 중심(110)이 상기 버텀커버부재 측으로 이동하여 상기 탑커버부재의 열응력의 중심(110)과 상기 버텀커버부재의 열응력의 중심(210)이 가까워져서,
냉각 수축 시 상기 탑커버부재와 버텀커버부재의 경계면에 인장력이 작용하는 것을 방지하여 전체적으로 고르게 냉각 수축할 수 있는 것을 특징으로 하는 레이더 전파 투과형 커버 제조방법preparing a main film layer in which a printed layer, a printed protective layer, an indium deposition layer, and an indium protective layer are formed;
A first step of forming a top cover member by injecting PC resin on the upper surface of the main film layer;
When the surface of the PC resin injected in the first step is 100 to 140 degrees Celsius, a second step of injecting the ASA resin to the rear surface of the main film layer to form a bottom cover member,
In the second step,
When heat is transferred from the ASA resin at a high temperature of 255 degrees Celsius to the top cover member,
When the top cover member reaches the flow transition temperature (155 degrees Celsius), the interface between the top cover member and the bottom cover member is activated, and the adhesive force between the PC resin and the ASA resin increases,
The center of thermal stress 110 of the top cover member moves toward the bottom cover member so that the center of thermal stress 110 of the top cover member and the center of thermal stress 210 of the bottom cover member become closer,
A method of manufacturing a radar wave transmission type cover, characterized in that it can be cooled and contracted evenly as a whole by preventing a tensile force from acting on the interface between the top cover member and the bottom cover member during cooling and shrinkage 삭제delete
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