KR100466712B1 - A Device for Cutting Tread - Google Patents

A Device for Cutting Tread Download PDF

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Publication number
KR100466712B1
KR100466712B1 KR10-2002-0019187A KR20020019187A KR100466712B1 KR 100466712 B1 KR100466712 B1 KR 100466712B1 KR 20020019187 A KR20020019187 A KR 20020019187A KR 100466712 B1 KR100466712 B1 KR 100466712B1
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KR
South Korea
Prior art keywords
adhesive solution
tread
box body
cement
blade
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Application number
KR10-2002-0019187A
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Korean (ko)
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KR20030080516A (en
Inventor
이갑배
Original Assignee
금호타이어 주식회사
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Priority to KR10-2002-0019187A priority Critical patent/KR100466712B1/en
Publication of KR20030080516A publication Critical patent/KR20030080516A/en
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Publication of KR100466712B1 publication Critical patent/KR100466712B1/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00Producing pneumatic or solid tyres or parts thereof
    • B29D30/06Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/0681Parts of pneumatic tyres; accessories, auxiliary operations
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/04Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member
    • B26D1/045Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member for thin material, e.g. for sheets, strips or the like
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/003Cutting work characterised by the nature of the cut made; Apparatus therefor specially adapted for cutting rubber
    • B26D3/005Cutting work characterised by the nature of the cut made; Apparatus therefor specially adapted for cutting rubber for cutting used tyres
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26DCUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/08Means for treating work or cutting member to facilitate cutting
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00Producing pneumatic or solid tyres or parts thereof
    • B29D30/0061Accessories, details or auxiliary operations not otherwise provided for
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00Producing pneumatic or solid tyres or parts thereof
    • B29D30/06Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/52Unvulcanised treads, e.g. on used tyres; Retreading

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Road Repair (AREA)

Abstract

본 발명은 스카이버(Skiver)로 타이어 트레드를 제단할 때 칼날에 불순물이 부착되지 않도록 수용성 시멘트를 공급함과 동시에 수용성 시멘트가 비산되지 않도록 하는 트레드 재단장치에 관한 것으로, 지지체에 고정되고 트레드를 절단하는 칼날이 구비되는 스카이버와, 상기 칼날의 일부가 진입되고 내부에 접착성 용액 시멘트가 흡입된 흡입물체가 내장되어 있는 박스체와, 접착성 용액탱크에 연결되고 접착성 용액 시멘트를 상기 박스체 안으로 공급하는 접착성 용액 시멘트 공급파이프와, 상기 접착성 용액 시멘트의 공급량을 조절하는 제어부를 포함하는 것을 특징으로 하는 것이다.The present invention relates to a tread cutting device for supplying a water-soluble cement and preventing the water-soluble cement from scattering when the tire tread is cut with a skyver so that impurities do not adhere to the blade. A box body having a blade provided therein, a box body into which a part of the blade enters, and a suction object into which the adhesive solution cement is sucked is embedded, and an adhesive solution cement connected to the adhesive solution tank and into the box body. It is characterized in that it comprises an adhesive solution cement supply pipe for supplying, and a control unit for controlling the supply amount of the adhesive solution cement.

Description

트레드 재단장치{A Device for Cutting Tread}Tread Cutting Device {A Device for Cutting Tread}

본 발명은 스카이버(Skiver)로 타이어 트레드를 재단할 때 칼날에 불순물이 부착되지 않도록 수용성 시멘트를 공급함과 동시에 수용성 시멘트가 비산되지 않도록 하는 트레드 재단장치에 관한 것이다.The present invention relates to a tread cutting device for supplying a water-soluble cement to prevent impurities from adhering to the blade when cutting the tire tread with a skyver and at the same time prevent the water-soluble cement from scattering.

종래의 트레드 재단장치(100′)를 설명하면 도 1에서 도시하는 바와 같이, 압출기에서 압출된 트레드(3)가 냉각탱크(1)의 냉각수 배관(2)에서 뿌려지는 냉각수에 의해 충분히 식혀진 후 이를 일정 길이로 절단하기 위해 트레드(3)가 이송 콘베이어(7)를 통하여 일정 속도로 이송된다. 이송된 트레드(3)는 일정속도로 이송되므로 칼날(4a)이 회전하는 스카이버(4)에 의해 절단이 이루어진다.Referring to the conventional tread cutting device (100 ') as shown in Figure 1, after the tread (3) extruded from the extruder is sufficiently cooled by the cooling water sprayed from the cooling water pipe (2) of the cooling tank (1) In order to cut it to a certain length, the tread 3 is fed at a constant speed through the conveying conveyor 7. Since the conveyed tread 3 is conveyed at a constant speed, cutting is performed by the skyber 4 in which the blade 4a rotates.

칼날(4a)이 회전하는 스카이버(4)는 절단하는 동안 많은 열이 발생하므로 물이 가득차 있는 용액탱크(6)에서 공급되는 차가운 물이 스카이버(4)가 작동되는 동안 스카이버를 식혀줄 수 있도록 스카이버 콘트롤러/솔레노이드 밸브(5)가 작동된다. 그리고 절단된 트레드(3)는 이송롤러(7)를 통하여 접착성 시멘트 도포장치(8)로 이송된다.As the blade 4a rotates, the skyber 4 generates a lot of heat during cutting, so the cold water supplied from the solution tank 6 filled with water cools the skyber while the skyber 4 is operating. The skyber controller / solenoid valve (5) is activated. And the cut tread 3 is conveyed to the adhesive cement applicator 8 via the conveying roller 7.

그런데, 종래의 트레드 재단장치는 칼날의 마찰열을 냉각시키는데 차가운 물로서 스카이버 칼날을 냉각시켜 주고 있다. 이러한 물로서 칼날을 냉각시키게 되면 물의 소비가 많을 뿐 아니라 사용된 물은 폐수통으로 집수되고 폐수처리 비용이 증대되는 문제가 따른다. 또한, 물 사용에 따른 스카이버를 지지하고 있는 철재 지지체에 녹이 발생되어 장비의 수명을 단축시키는 문제를 초래하게 된다.However, the conventional tread cutting device cools the skyber blade as cold water to cool the frictional heat of the blade. Cooling the blades with such water consumes a lot of water, and the used water is collected in the waste water bottle and the waste water treatment costs are increased. In addition, the rust is generated in the steel support that supports the skyber according to the use of water causes a problem of shortening the life of the equipment.

이와 같이 물 사용으로 인한 문제점을 없애고자 착안한 것이 접착성 용액 시멘트이다. 트레드 절단 공정 다음에 접착성 용액 시멘트를 절단면에 도포하게 되는데, 이 접착성 용액 시멘트로 칼날을 냉각시키게 되면 여러가지 장점이 있다. 즉, 접착성 용액 시멘트의 장점은 물을 사용하지 않게 되므로 폐수처리 비용이 발생하지 않으며, 점성이 물보다 높아 주위로 흩뿌려지지 않으며, 철재로 이루어진 지지체의 부식을 방지할 수 있 등이 장점을 가질 수 있다.In order to eliminate the problems caused by the use of water as described above is an adhesive solution cement. After the tread cutting process, the adhesive solution cement is applied to the cut surface, and cooling the blade with the adhesive solution cement has various advantages. In other words, the advantages of the adhesive solution cement is that it does not use water, so it does not incur waste water treatment costs, and because it is more viscous than water, it does not scatter around and prevents corrosion of the support made of steel. Can have

상기한 바와 같이, 접착성 용액 시멘트로 스카이버의 칼날을 냉각시킬 경우 많은 장점이 있음에도 불구하고 마땅한 장치가 없었던 것이 사실이다. 따라서, 접착성 용액 시멘트로 스카이버의 칼날을 냉각시킬 수 있는 장치의 필요성을 갖게 되었다.As mentioned above, it is true that there was no suitable device despite the many advantages of cooling skyber blades with adhesive solution cement. Thus, there is a need for an apparatus capable of cooling the blades of the skyber with adhesive solution cement.

본 발명의 목적은 스카이버로 트레드를 절단할 때 칼날의 마찰열을 냉각시켜 줌과 동시에 트레드 절단면에 도포시키는 접착성 용액 시멘트로 냉각할 수 있는 트레드 재단장치를 제공하는데 있다.SUMMARY OF THE INVENTION An object of the present invention is to provide a tread cutting device that can cool the frictional heat of a blade when cutting a tread with a skyber and cool it with adhesive solution cement that is applied to the tread cut surface.

본 발명의 다른 목적은 스카이버 칼날에 묻는 접착성 용액 시멘트의 비산을 방지할 수 있는 트레드 재단장치를 제공하는데 있다.Another object of the present invention is to provide a tread cutting device that can prevent the scattering of the adhesive solution cement on the skyber blade.

도 1은 종래의 트레드 재단장치를 포함한 트레드의 이송장치를 개략적으로 나타낸 개념도이다.1 is a conceptual diagram schematically showing a tread transfer device including a conventional tread cutting device.

도 2는 본 발명에 따른 트레드 재단장치를 포함한 트레드의 이송장치를 개략적으로 나타낸 개념도이다.2 is a conceptual diagram schematically showing a tread transfer device including a tread cutting device according to the present invention.

도 3은 본 발명에 따른 트레드 재단장치를 나타낸 예시도이다.Figure 3 is an exemplary view showing a tread cutting device according to the present invention.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

10:지지체, 20:스카이버,10: support body, 20: skyber,

21:칼날, 30:박스체,21: blade, 30: box body,

31:흡입물체, 40:접착성 용액탱크,31: suction object, 40: adhesive solution tank,

50:용액 공급파이프, 60:제어부,50: solution supply pipe, 60: control unit,

61:용액 공급밸브, 62:습도 측정센서.61: solution supply valve, 62: humidity sensor.

상기한 기술적 과제를 달성하기 위한 본 발명의 트레드 재단장치는, 트레드를 절단하는 칼날이 구비되는 스카이버와, 상기 칼날의 일부가 진입되고 내부에 접착성 용액이 흡입된 흡입물체가 내장되어 있는 박스체와, 상기 박스체 안으로 접착성 용액 공급파이프를 통하여 접착성 용액을 공급하는 접착성 용액탱크와, 상기 접착성 용액의 공급량을 조절하는 제어부를 포함하여 구성되는 것을 특징으로 한다.Tread cutting device of the present invention for achieving the above technical problem, the box is provided with a skyber provided with a blade for cutting the tread, and a suction object in which a portion of the blade is entered and the adhesive solution is sucked therein It characterized in that it comprises a sieve, an adhesive solution tank for supplying an adhesive solution through the adhesive solution supply pipe into the box body, and a control unit for controlling the supply amount of the adhesive solution.

여기서, 상기 제어부는 박스체 안에 접착성 용액 공급밸브 및 습도 측정 센서가 내장되어 있는 것을 특징으로 하는 것이다.Here, the control unit is characterized in that the adhesive solution supply valve and the humidity measuring sensor is built in the box body.

이하, 첨부도면을 참조하여 본 발명의 실시예를 상세히 설명한다.Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

도 2는 본 발명에 따른 트레드 재단장치를 포함하는 트레드 이송장치를 개략적으로 나타낸 개념도이고, 도 3은 본 발명에 따른 트레드 재단장치를 나타내는 예시도이다.2 is a conceptual view schematically showing a tread feeder including a tread cutting device according to the present invention, Figure 3 is an exemplary view showing a tread cutting device according to the present invention.

본 발명의 트레드 재단장치(100)는 스카이버(20)와 박스체(30)와 접착성 용액탱크(40)와 접착성 용액 공급파이프(50) 및 제어부(60)를 포함하여 구성된다.Tread cutting device 100 of the present invention comprises a skyber 20, the box body 30, the adhesive solution tank 40, the adhesive solution supply pipe 50 and the control unit 60.

스카이버(20)는 지지체(10)에 지지된 상태로 좌우측으로 이동하면서 회전하는 칼날(21)로 트레드(3)를 절단하는 것이다. 트레드(3)를 절단할 때 칼날(21)에서는 마찰열이 발생하고 불순물이 묻기 때문에 냉각시켜 줄 필요가 있으며, 불순물을 제거해 줄 필요가 있다.The skyber 20 cuts the tread 3 with the blade 21 rotating while moving left and right while being supported by the support 10. When cutting the tread 3, the blade 21 needs to be cooled because friction heat is generated and impurities are buried, and it is necessary to remove impurities.

박스체(30)는 일면으로 칼날(21)의 일부가 진입될 수 있도록 개구부(32)를 제외하고는 모두 밀폐되어 있다. 박스체(30) 내부에는 접착성 용액 시멘트를 흡입할 수 있는 스폰지, 솜 등의 흡입물체(31)가 내장되어 있다. 따라서 흡입물체(31)가 접착성 용액 시멘트로 적셔져 있는 상태에서 칼날(21)이 박스체(30)를 통과하면 접착성 용액 시멘트에 의해 칼날이 냉각됨과 동시에 박스체(30)에 의해 접착성 용액 시멘트의 비산을 방지할 수 있다. 박스체(30)는 스카이버(20)에 브라켓으로 고정되고 스카이버와 함께 이동된다.The box body 30 is all closed except for the opening 32 so that a part of the blade 21 can enter into one surface. Inside the box body 30, a suction object 31, such as a sponge or cotton, capable of sucking the adhesive solution cement is incorporated. Therefore, if the blade 21 passes through the box body 30 while the suction object 31 is wetted with the adhesive solution cement, the blade is cooled by the adhesive solution cement and the adhesiveness is made by the box body 30. It is possible to prevent the scattering of the solution cement. The box body 30 is fixed to the skyber 20 with a bracket and moved with the skyber.

접착성 용액탱크(40)는 용액 공급파이프(50)를 통하여 접착성 용액 시멘트를 박스체(30) 안으로 공급하여 주는 것이다. 이 때 , 용액 공급파이프(50)의 일단부에는 용액탱크(40)에 연결되고 타단부에는 박스체(30)가 연결되어 있다. 특히 용액 공급파이프(50)의 타단부에는 박스체(30)가 연결되는 바, 박스체(30)와 함께 좌우 왕복운동을 할 수 있도록 플렉시블한 호스 등을 사용하는 것이 필요하다.The adhesive solution tank 40 supplies the adhesive solution cement into the box body 30 through the solution supply pipe 50. At this time, one end of the solution supply pipe 50 is connected to the solution tank 40, and the other end is connected to the box body 30. In particular, the other end of the solution supply pipe 50 is connected to the box body 30, it is necessary to use a flexible hose or the like to allow the left and right reciprocating movement with the box body (30).

제어부(60)는 접착성 용액 시멘트의 공급량을 조절하는 것으로, 박스체 안에 접착성 용액 공급밸브(61) 및 습도 측정센서(62)가 내장되어 있다.The control unit 60 adjusts the supply amount of the adhesive solution cement, and the adhesive solution supply valve 61 and the humidity measuring sensor 62 are built in the box body.

여기서, 접착성 용액 공급밸브(61)는 박스체(30) 내에 설치되고, 습도 측정센서(62)가 보내는 신호에 따라 제어부가 작동하여 습도가 낮으면 밸브가 열려 용액이 공급되고 습도가 높으면 닫힐 수 있는 전동식 솔레노이드 밸브로 구성되어 있으며, 습도 측정센서(62)는 박스체(30) 내에 설치되고, 박스체(30) 내부의 습도를 측정할 수 있는 디지탈 센서로 이루어져 초당 10∼20번 정도 박스체 내부의 습도를 측정한 후 평균값을 제어부로 송출하는 것이다.Here, the adhesive solution supply valve 61 is installed in the box body 30, the control unit operates according to the signal sent by the humidity measuring sensor 62, the valve is opened when the humidity is low, the solution is supplied, and closed when the humidity is high It consists of an electric solenoid valve that can be, and the humidity sensor 62 is installed in the box body 30, consisting of a digital sensor that can measure the humidity in the box body 30 to about 10 to 20 times a second box After measuring the humidity inside the sieve, the average value is sent to the control unit.

이러한 제어부(60)는 8비트 마이콤(bit mycom)으로 구성되어 있으며, 박스체 내부의 습도가 60% 이하가 될 때 접착성 용액 공급 밸브를 열도록 신호를 산출하며, 습도 측정센서가 보내는 신호를 30초간 평균한 값을 최종 습도로 인식하여 접착성 용액 공급밸브에 신호를 주도록 구성하고 있다.The control unit 60 is composed of 8-bit mycom (bit mycom), calculates a signal to open the adhesive solution supply valve when the humidity inside the box is less than 60%, and sends a signal from the humidity measuring sensor It is configured to recognize the average value for 30 seconds as the final humidity and signal the adhesive solution supply valve.

상기와 같이 구성되는 본 발명의 작동관계를 설명하면 다음과 같다. 이송 콘베이어(7) 위로 트레드(3)가 일정한 속도로 이송되고, 스카이버(20)는 트레드 이송방향에 대하여 직교방향으로 왕복운동함과 동시에 회전하는 칼날(21)로 트레드(3)를 절단하게 된다. 이 때, 칼날(21)은 박스체(30)에 내장되어 있는 접착성 용액 시멘트에 의해 냉각됨과 동시에 칼날에 묻은 시멘트는 박스체에 의해 비산이 방지된다. 또한, 제어부(60)는 용액 공급파이프(50)를 통하여 적절한 양의 용액을 박스체(30) 안으로 공급하게 된다.Referring to the operating relationship of the present invention configured as described above are as follows. The tread 3 is conveyed at a constant speed above the conveying conveyor 7, and the skyber 20 cuts the tread 3 with the blade 21 which rotates simultaneously with the reciprocating direction orthogonal to the tread conveyance direction. do. At this time, the blade 21 is cooled by the adhesive solution cement embedded in the box body 30 and the cement buried in the blade is prevented from scattering by the box body. In addition, the controller 60 supplies the appropriate amount of solution into the box body 30 through the solution supply pipe 50.

이상에서와 같이, 본 발명의 트레드 재단장치는 트레드 절단면에 도포시키는 접착성 용액 시멘트로 스카이브 칼날을 냉각시키게 됨으로써, 물을 사용하지 않게 되므로 폐수처리 비용이 발생하지 않으며, 점성이 물보다 높아 주위로 흩뿌려지지 않으며, 철재로 이루어진 지지체의 부식을 방지할 수 있으며, 트레드의 절단면만 접착성 용액이 묻게 되므로 다음 공정인 절단면 접착제 도포공정을 생략할 수도 있으며, 작업자의 노동강도를 저하시킬 수 있으며, 트레드 제조 공정 비용의 감소를 기대할 수 있다.As described above, the tread cutting device of the present invention by cooling the skive blades with the adhesive solution cement applied to the tread cutting surface, since no water is used, waste water treatment cost does not occur, the viscosity is higher than the water It can be prevented from being scattered and prevents the corrosion of the support made of steel, and since only the cutting surface of the tread gets the adhesive solution, the next step of applying the cutting surface adhesive can be omitted, and the labor intensity of the worker can be reduced. As a result, the tread manufacturing process cost can be reduced.

또한, 본 발명은 스카이버의 칼날을 박스체가 감싸고 있으므로 접착성 용액 시멘트의 비산을 방지할 수 있는 효과를 갖는다.In addition, the present invention has the effect that can prevent the scattering of the adhesive solution cement because the box body is wrapped around the blade of the skyber.

Claims (2)

트레드를 절단하는 칼날(21)이 구비되는 스카이버(20)와,Skyber 20 is provided with a blade 21 for cutting the tread, 상기 칼날(21)의 일부가 진입되고 내부에 접착성 용액이 흡입된 흡입물체(31)가 내장되어 있는 박스체(30)와,A box body 30 in which a part of the blade 21 enters and a suction object 31 into which an adhesive solution is sucked is embedded; 상기 박스체(30) 안으로 접착성 용액 공급파이프(50)를 통하여 접착성 용액을 공급하는 접착성 용액탱크(40)와,An adhesive solution tank 40 for supplying an adhesive solution through the adhesive solution supply pipe 50 into the box body 30; 상기 접착성 용액의 공급량을 조절하는 제어부(60)를 포함하여 구성되는 것을 특징으로 하는 트레드 재단장치.Tread cutting device comprising a control unit for adjusting the supply amount of the adhesive solution (60). 제1항에 있어서,The method of claim 1, 상기 제어부(60)는 상기 박스체(30) 안에 접착성 용액 공급밸브(61) 및 습도 측정센서(62)가 내장되어 있는 것을 특징으로 하는 트레드 재단장치.The control unit 60 is a tread cutting device, characterized in that the adhesive solution supply valve 61 and the humidity measuring sensor 62 is built in the box body (30).
KR10-2002-0019187A 2002-04-09 2002-04-09 A Device for Cutting Tread KR100466712B1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4782591A (en) * 1987-11-23 1988-11-08 Devito Anthony Saw blade cooling system
JP2000198134A (en) * 1999-01-07 2000-07-18 Bridgestone Corp Tread cutting device and pneumatic tire manufactured using the device
JP2001353616A (en) * 2000-06-14 2001-12-25 Tsune Seiki Co Ltd Circular saw cooling method in circular saw cutting machine, and circular saw

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4782591A (en) * 1987-11-23 1988-11-08 Devito Anthony Saw blade cooling system
JP2000198134A (en) * 1999-01-07 2000-07-18 Bridgestone Corp Tread cutting device and pneumatic tire manufactured using the device
JP2001353616A (en) * 2000-06-14 2001-12-25 Tsune Seiki Co Ltd Circular saw cooling method in circular saw cutting machine, and circular saw

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