KR100388316B1 - Cooling apparatus of mandrel - Google Patents

Cooling apparatus of mandrel Download PDF

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Publication number
KR100388316B1
KR100388316B1 KR1019970000197A KR19970000197A KR100388316B1 KR 100388316 B1 KR100388316 B1 KR 100388316B1 KR 1019970000197 A KR1019970000197 A KR 1019970000197A KR 19970000197 A KR19970000197 A KR 19970000197A KR 100388316 B1 KR100388316 B1 KR 100388316B1
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South Korea
Prior art keywords
mandrel
film
cooling
coolant
overflow wall
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KR1019970000197A
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Korean (ko)
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KR19980065300A (en
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문경철
송기상
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주식회사 코오롱
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Priority to KR1019970000197A priority Critical patent/KR100388316B1/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
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/28—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of blown tubular films, e.g. by inflation
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D7/00—Producing flat articles, e.g. films or sheets
    • B29D7/01—Films or sheets

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE: A cooling apparatus of a mandrel is provided to increase cooling efficiency by discharging high temperature coolant easily after cooling early in manufacturing film, to improve the property of film by increasing the elongation rate with cooling evenly at constant temperature of coolant, and to increase the productivity by manufacturing the film quickly. CONSTITUTION: A cooling apparatus is composed of a mandrel(20) passing the annular film in the outer periphery and an inclined surface(24) formed outward and upward in the upper edge; a coolant nozzle(22) cooling the inside of the film by discharging coolant from the inside of the mandrel to the outer periphery; and an overflow wall(26) installed in the upper part of the mandrel and lifted up and down. The tilt angle between the inclined surface and the upper horizontal plane of the mandrel is formed to be within the range of 0 to 60 angular degrees. The height of the overflow wall is adjusted by operating a lift unit(28), and the lift unit is controlled by a control unit according to coolant temperature and thickness or transparency of film.

Description

맨드럴의 냉각장치Mandrel's Chiller

본 발명은 맨드럴의 냉각장치에 관한 것으로서, 특히 압출기의 환상 다이로부터 용융 압출된 열가소성 수지에 항상 균일한 온도를 유지할 수 있는 냉각수를 공급하여 투명도가 양호하고 평면성이 우수하며 두께가 균일하게 형성될 수 있도록 된 맨드럴의 냉각장치에 관한 것이다.The present invention relates to a cooling device of the mandrel, in particular, by supplying a cooling water that can always maintain a uniform temperature to the melt-extruded thermoplastic resin from the annular die of the extruder is good transparency, excellent planarity and uniform thickness It relates to a cooling device of the mandrel.

도 1 은 환상의 열가소성 필름의 제조 공정을 나타내는 개략도로서, 압출기(1)에서 압출된 원료가 맨드럴(2)을 통과하면서 관상의 필름(F)으로 형성되고, 상기 맨드럴(2)을 통과한 필름(F)은 슬릿터(3)에 의해 양측이 절단되어 한 쌍의 닛프 롤(4)을 통과한 후 권취되도록 구성되어 있다.1 is a schematic view showing the manufacturing process of the annular thermoplastic film, wherein the raw material extruded from the extruder 1 is formed into a tubular film F while passing through the mandrel 2, and passes through the mandrel 2. One film F is comprised so that both sides may be cut | disconnected by the slitter 3, and it winds up after passing through a pair of nipple rolls 4.

종래에 결정성 열가소성 수지 예컨대, 폴리프로필렌에서 환상의 필름을 제조하는 경우에 냉풍 인플레이션 방식이나 필름의 외부에서 냉각액을 접촉시키는 외부 냉각식에서는 압출된 용융 상태의 관상 필름의 냉각 속도가 빠르고 결정화도가 작으며 투명도가 큰 필름이 얻어지지 않는다고 알려져 있다.Conventionally, in the case of producing a cyclic film from a crystalline thermoplastic resin such as polypropylene, the cooling rate of the extruded molten tubular film is high and the crystallization degree is low in the cold air inflation method or in the external cooling type in which the coolant is brought into contact with the outside of the film. It is known that a film with high transparency cannot be obtained.

또한, 용융 상태의 관상 필름의 외측을 외부 냉각액 탱크 중의 외부 냉각액에서 냉각함과 동시에 필름의 내측을 내부 액냉식 맨드럴의 표면에 직접 접촉시키는 방법도 있으나, 이는 필름의 제막 속도를 대폭적으로 증가시키는 것이 어렵고 구조적으로 복잡하다고 하는 등의 문제점이 있었다.In addition, there is a method of cooling the outer side of the tubular film in the molten state with the outer coolant in the outer coolant tank and directly contacting the inner side of the film with the surface of the inner liquid-cooled mandrel, which greatly increases the film forming speed of the film. There are problems such as difficulty and structural complexity.

도 2 는 맨드럴(2)의 내측에서 냉각수 노즐(5)을 통하여 냉각수를 공급하고, 상기 맨드럴(2)의 상측에 환상의 오버 플로우 벽(6)을 고정시켜서 필름(F)의 내측벽에 냉각수가 접촉되도록 하는 냉각장치도 제안되고 있으나, 이는 오버 플로우 벽(6)의 높이가 고정됨에 따라 그 내측에 저류된 냉각수(W)가 항상 일정량을 유지함으로써 필름의 초기 냉각 시점이 고정되고 장시간 동안 냉각수가 체류됨으로 인하여 냉각 효율이 감소됨은 물론 시이트의 제조시 불완전한 탁도가 형성되고, 후가공 공정에서 인쇄시 수염 현상이나 알루미늄 등의 금속 증착시 얼룩 등이 발생되며, 환형 필름의 내부에서 냉각수량 및 높이의 조절이 불가능하여 필름의 연신성 및 물리적 등방성이 감소되는 등의 여러 가지 문제점들이 내재되어 있었다.2 shows cooling water supplied from the inside of the mandrel 2 through the cooling water nozzle 5, and the inner wall of the film F by fixing the annular overflow wall 6 above the mandrel 2. A cooling device is also proposed to allow the coolant to come into contact with the coolant. However, as the height of the overflow wall 6 is fixed, the coolant W stored therein always maintains a constant amount, so that the initial cooling point of the film is fixed and the long time is maintained. Cooling water stays for a while, cooling efficiency is reduced, as well as incomplete turbidity is formed during sheet manufacturing, whiskers during printing or staining during deposition of metal such as aluminum, and the like, the amount of cooling water in the annular film Various problems have been inherent, such as being unable to adjust the height, thereby reducing the stretchability and physical isotropy of the film.

본 발명은 상술한 바와 같은 종래 기술의 문제점들을 해결하기 위하여 발명된 것으로서, 본 발명의 목적은 필름의 내측면에 접촉되는 냉각수의 온도가 항상 일정 온도를 유지하도록 오버 플로우 벽을 높이 조절 가능케 설치하여 제막 운전 중에도 필름과 오버 플로우 벽과의 냉각수 량의 조절이 가능하고, 냉각수 온도의 상승을 방지함과 동시에 필름의 물성 변화를 감시 및 조절할 수 있는 맨드럴의 냉각장치를 제공하는데 있다.The present invention has been invented to solve the problems of the prior art as described above, the object of the present invention is to provide a height adjustable so that the overflow wall so that the temperature of the coolant in contact with the inner surface of the film always maintains a constant temperature It is possible to adjust the amount of coolant between the film and the overflow wall during the film forming operation, and to provide a cooling device of the mandrel that prevents an increase in the temperature of the coolant and at the same time monitors and regulates changes in the properties of the film.

이와 같은 목적을 실현하기 위하여 이루어진 본 발명에 의한 맨드럴의 냉각장치는 외주면에 환상의 필름이 통과되고 상측 가장자리에는 외측으로 상향하는 경사면이 형성된 맨드럴과, 상기 맨드럴의 내측에서 외주면을 향하여 냉각수를 토출시켜 필름의 내측면을 냉각시키는 냉각수 노즐과, 상기 맨드럴의 상측에 외주면과 적정의 간격을 두고 승강가능케 설치된 오버 플로우 벽을 구비하는 것을 특징으로 한다.Mandrel cooling device according to the present invention made to achieve the above object is a mandrel having an inclined surface is passed through the outer peripheral surface and the upper edge is formed to the outer edge, the cooling water toward the outer peripheral surface from the inside of the mandrel It is characterized in that it comprises a cooling water nozzle for cooling the inner surface of the film by discharging the discharge, and an overflow wall provided to be able to move up and down at an appropriate interval on the outer peripheral surface on the upper side of the mandrel.

도 1 은 일반적인 관상의 열가소성 수지 필름으로부터 시이트상의 필름의 제조 공정을 나타내는 개략도이다.BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram which shows the manufacturing process of a sheet-like film from a general tubular thermoplastic resin film.

도 2 는 본 발명에 의한 종래 필름의 제조 공정에 적용된 맨드럴의 냉각장치를 나타내는 일부 도면이다.Figure 2 is a view showing a part of the cooling device of the mandrel applied to the manufacturing process of the conventional film according to the present invention.

도 3 은 본 발명에 의한 맨드럴의 냉각장치를 나타내는 도면이다.3 is a view showing a cooling device of the mandrel according to the present invention.

*도면의 주요 부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *

20:맨드럴 22:냉각수 노즐20: mandrel 22: coolant nozzle

24:경사면 26:오버 플로우 벽24: Slope 26: Overflow wall

28:승강수단28: lifting means

이하, 본 발명의 바람직한 실시예를 첨부된 도면에 따라서 더욱 상세하게 설명하고자 한다.Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

도 3 은 본 발명에 의한 맨드럴의 냉각장치를 나타내는 도면으로서, 맨드럴(20)의 가장자리 내측에는 냉각수를 필름(F)의 내측면으로 공급하는 냉각수 노즐(22)이 경사지게 설치되어 있고, 그 상측에는 외주면으로 향하여 상측으로 경사지는 경사면(24)이 형성되어 있다.3 is a view showing a mandrel cooling device according to the present invention, wherein a coolant nozzle 22 for supplying coolant to the inner surface of the film F is inclined inside the edge of the mandrel 20. The inclined surface 24 which inclines upward toward the outer peripheral surface is formed in the upper side.

상기 경사면(24)은 맨드럴(20)의 상측 수평면과 소정의 경사각(α)으로 경사지게 형성되어 있다.The inclined surface 24 is inclined at a predetermined inclination angle α with the upper horizontal surface of the mandrel 20.

상기 경사면(24)의 경사각(α)은 0° 보다는 크고 60°보다는 작은 각도로 형성됨이 더욱 바람직하다.The inclination angle α of the inclined surface 24 is more preferably formed at an angle larger than 0 ° and smaller than 60 °.

그리고, 상기 경사면(24)에는 전체면에 걸쳐 환상의 오버 플로우 벽(26)이 승강 가능케 설치되어 있고, 상기 오버 플로우 벽(26)은 승강수단(28)의 작동에 따라 높이 조절이 가능케 승강 작동되도록 구성되어 있다.In addition, the inclined surface 24 is provided with an annular overflow wall 26 capable of elevating over the entire surface, and the overflow wall 26 is capable of height adjustment according to the operation of the elevating means 28. It is configured to be.

상기 승강수단(28)은 냉각수의 온도나 필름의 두께 또는 투명도 등에 따라 제어수단(30)에서 보내지는 신호에 의해 제어되는데, 예컨대 실린더 및 로드로 이루어지는 유압 수단이나 모터로 구성될 수 있음은 물론이다.The lifting means 28 is controlled by a signal sent from the control means 30 according to the temperature of the cooling water or the thickness or transparency of the film, for example, may be composed of a hydraulic means or a motor consisting of a cylinder and a rod, of course. .

이와 같이 구성된 본 발명에 의한 맨드럴의 냉각장치는 필름(F)이 맨드럴(20)의 외주면에 공급되면서 제조가 이루어지게 되는데, 이때 필름(F)의 두께나 투명도 등에 따라 제어수단(30)에서 보내지는 신호에 의해 오버 플로우 벽(26)이 적정의 높이로 위치되고, 냉각수 노즐(22)을 통하여 냉각수(W)가 필름(F)의 내측면으로 공급되어진다.The cooling device of the mandrel according to the present invention configured as described above is produced while the film (F) is supplied to the outer circumferential surface of the mandrel (20), wherein the control means (30) according to the thickness or transparency of the film (F) The overflow wall 26 is positioned at an appropriate height by a signal sent from the cooling wall, and the cooling water W is supplied to the inner surface of the film F through the cooling water nozzle 22.

그리고, 상기 냉각수 노즐(22)을 통하여 필름(F)의 내측면으로 공급되는 냉각수(W)는 필름(F)에 접촉되면서 냉각이 이루어진 후 경사면(24)을 따라서 이동되어 필름(F)과 오버 플로우 벽(26)의 사이에 저류된다.In addition, the cooling water W supplied to the inner surface of the film F through the cooling water nozzle 22 is moved along the inclined surface 24 after being cooled while being in contact with the film F to overshoot the film F. It is stored between the flow walls 26.

상기 오버 플로우 벽(26)에 의해 저류된 냉각수(W)는 냉각수 노즐(22)을 통하여 계속적으로 공급되는 냉각수(W)에 의해 일부는 오버 플로우되면서 냉각 작용을 행하게 된다.The cooling water W stored by the overflow wall 26 is partially cooled by the cooling water W continuously supplied through the cooling water nozzle 22 to perform a cooling action.

상기 오버 플로우 벽(26)의 승강 작동은 필름(F)의 제조시에도 이루어지며, 이는 냉각수(W)의 수온에 따라 적절한 높이로 승강시켜 필름(F)에 접촉되어 승온된 냉각수(W)냉각수 노즐(22)로부터 공급되는 냉각수(W)가 가열되는 것을 방지하게 되는 것이다.The operation of elevating the overflow wall 26 is also performed during the manufacture of the film F. The cooling water W cooling water heated up by contacting the film F is elevated to an appropriate height according to the water temperature of the cooling water W. The cooling water W supplied from the nozzle 22 is prevented from being heated.

그리고, 상기 오버 플로우 벽(22)의 승강 작동에 따라 그 외측에 저류되는 냉각수(W)의 량을 조절하는 것이 가능케 되는 것이다.In addition, it is possible to adjust the amount of the coolant W stored on the outside in accordance with the lifting operation of the overflow wall 22.

상술한 바와 같이 본 발명에 의한 맨드럴의 냉각장치에서는 필름의 제조시 초기 냉각후 승온된 냉각수의 배출이 용이하고 이에 따라 냉각 효율을 증대시킬 수 있으며, 필름에 접촉되는 냉각수가 항상 일정 온도를 유지함으로써 균일한 냉각이 가능하고 이에 따라 필름의 연신율이 증대되어 필름의 물성을 향상시킬 수 있고, 필름의 제막 속도를 상승시켜 생산성을 증대시킴과 동시에 제조 코스트를 절감할 수 있는 등의 여러 가지 효과가 있다.As described above, in the cooling device of the mandrel according to the present invention, it is easy to discharge the cooled water after initial cooling during the manufacture of the film, thereby increasing the cooling efficiency, and the cooling water in contact with the film always maintains a constant temperature. As a result, uniform cooling is possible, and accordingly, the elongation of the film is increased to improve the physical properties of the film, the film forming speed of the film is increased, the productivity is increased, and the manufacturing cost can be reduced. have.

Claims (4)

외주면에 환상의 필름이 통과되고 상측 가장자리에는 외측으로 상향하는 경사면이 형성된 맨드럴과, 상기 맨드럴의 내측에서 외주면을 향하여 냉각수를 토출시켜 필름의 내측면을 냉각시키는 냉각수 노즐과, 상기 맨드럴의 상측에 외주면과 적정의 간격을 두고 승강가능케 설치된 오버 플로우 벽을 구비하는 것을 특징으로 하는 맨드럴의 냉각장치.A mandrel having an annular film passing through the outer circumferential surface and an inclined surface upwardly upwardly formed at an upper edge thereof, a coolant nozzle for cooling the inner surface of the film by discharging cooling water from the inner side of the mandrel toward the outer circumferential surface thereof, A mandrel cooling device, comprising: an overflow wall provided on an upper side so as to be able to move up and down at an appropriate interval from an outer peripheral surface. 제 1 항에 있어서, 상기 오버 플로우 벽은 유압수단에 의해 승강되는 것을 특징으로 하는 맨드럴의 냉각장치.2. The mandrel cooling apparatus according to claim 1, wherein the overflow wall is elevated by hydraulic means. 제 1 항에 있어서, 상기 오버 플로우 벽은 모터의 구동에 따라 승강되는 것을 특징으로 하는 맨드럴의 냉각장치.The mandrel cooling apparatus according to claim 1, wherein the overflow wall is elevated in accordance with driving of the motor. 제 1 항에 있어서, 상기 경사면의 경사각은 0°보다 크고 60°보다 작은 것을 특징으로 하는 맨드럴의 냉각장치.The mandrel cooling device according to claim 1, wherein the inclination angle of the inclined surface is larger than 0 ° and smaller than 60 °.
KR1019970000197A 1997-01-07 1997-01-07 Cooling apparatus of mandrel KR100388316B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102324061B1 (en) 2020-12-31 2021-11-10 주식회사 파인 Optical cable that can identify both ends

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102324061B1 (en) 2020-12-31 2021-11-10 주식회사 파인 Optical cable that can identify both ends

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