WO2009084762A1 - Appareil pour chauffage et refroidissement rapides d'un moule à injection et procédé de régulation de la température du moule à injection - Google Patents

Appareil pour chauffage et refroidissement rapides d'un moule à injection et procédé de régulation de la température du moule à injection Download PDF

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Publication number
WO2009084762A1
WO2009084762A1 PCT/KR2008/000254 KR2008000254W WO2009084762A1 WO 2009084762 A1 WO2009084762 A1 WO 2009084762A1 KR 2008000254 W KR2008000254 W KR 2008000254W WO 2009084762 A1 WO2009084762 A1 WO 2009084762A1
Authority
WO
WIPO (PCT)
Prior art keywords
heater
heating
fluid
mounting holes
heat
Prior art date
Application number
PCT/KR2008/000254
Other languages
English (en)
Inventor
Nam Wuk Heo
Original Assignee
Nam Wuk Heo
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=40824461&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2009084762(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Nam Wuk Heo filed Critical Nam Wuk Heo
Publication of WO2009084762A1 publication Critical patent/WO2009084762A1/fr

Links

Classifications

    • 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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/72—Heating or cooling
    • 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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/72—Heating or cooling
    • B29C45/73—Heating or cooling of the mould
    • B29C45/7306—Control circuits therefor
    • 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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/72—Heating or cooling
    • B29C45/73—Heating or cooling of the mould
    • 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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/72—Heating or cooling
    • B29C45/73—Heating or cooling of the mould
    • B29C45/7312—Construction of heating or cooling fluid flow channels
    • 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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/76—Measuring, controlling or regulating
    • 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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/76—Measuring, controlling or regulating
    • B29C45/78—Measuring, controlling or regulating of temperature
    • 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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/72—Heating or cooling
    • B29C45/73—Heating or cooling of the mould
    • B29C2045/7393—Heating or cooling of the mould alternately heating and cooling

Definitions

  • the present invention relates to an apparatus for heating or cooling an injection mold, more particularly for quickly heating or cooling an injection mold to the predetermined temperature.
  • the present invention relates to method of controlling the temperature of an injection mold to minimize differential of the temperature around the whole cavity in the injection mold and further to shorten the cycle time of the injection molding process.
  • a control of the temperature of the mold as well as the temperature of molten resin is very important in the injection molding process.
  • defects such as 'weld-line' and 'flow-mark' occur on the surface of the moled product.
  • the temperature of the mold is excessively high, it is required to lower the temperature of the mold for ejecting the molded part from the mold and then to re -heat the mold for the following injection process. This makes a cycle time longer and thus causes low-productivity. Accordingly, it is required to control the temperature of the injection mold to be uniform within a predetermined range over the whole cavity for a good-quality of product and a high productivity.
  • a conventional method of heating or cooling the injection mold is to provide electric heaters for heating the mold and passages of cooling fluid in the mold.
  • the conventional method it is difficult to control the temperature of the mold uniformly over the whole mold because the mold is directly heated partially by the electric heaters.
  • the whole size of the mold becomes bigger because it requires additional space for the passage of the cooling or heating fluid.
  • An apparatus comprises a mold block having a cavity for molten resin to be injected therein and a plurality of heater-mounting holes;
  • each heater cartridge being inserted into the heater-mounting hole and having a heating element spaced with the inner wall of the heater-mounting hole to form an annular gap therebetween;
  • heating/cooling fluid passage allows the fluid heated by the heater cartridge in the heater-mounting hole to circulating in the mold block or allows the fluid to pass through the heater-mounting hole without being heated by the heater cartridge.
  • the present invention further comprises a heat- transfer plate wound in a helix shape on the surface of the heating element and being contact with the inner wall of the heater-mounting hole to transfer heat of the heating element to the inner wall.
  • the present invention further comprises a plurality of heat- transfer plates longitudinally mounted on the outer surface of the heating element, the heat-transfer plates being apart from each other along the circumference and being contact with the inner wall of the heater-mounting hole to transfer heat of the heating element thereto.
  • the apparatus according to the present invention further comprises a heat- transfer tube fitted on the heat-transfer plate to transfer heat of the heating element to the inner wall of the heater-mounting hole.
  • the apparatus according to the present invention further comprises a plurality of temperature sensors mounted around the cavity for detecting the local temperatures around the cavity in the mold block and thus transmitting the signal corresponding to the detected local temperature, and a temperature controller to selectively supply electric power to the electric heater cartridges according to the signals from the sensors.
  • the mold can be heated quickly up to the working temperature because the mold is directly heated by the electric heater cartridges and also is uniformly heated by the heating fluid. Further, the mold is also cooled quickly to the temperature for ejection because the cooling fluid through the heating/cooling fluid passage serves to cool the mold quickly.
  • the present invention may increase the productivity of injection molding by shortening the cycle time of injection molding.
  • the present invention may prevent from the defect of quality derived from the temperature differential around the cavity, for example, "weld line” and "flow mark” because it can control the temperature of the mold uniformly.
  • the whole injection molding apparatus can be compact because the heater cartridges directly heat the fluid passing through the heater-mounting holes and thus additional equipments for heating the fluid, such as a boiler, the conduits and a tank for storing the fluid, are not required.
  • FIG. 1 is a schematic plane elevation view of the apparatus for quick heating and cooling an injection mold according to the present invention.
  • FIG. 3 is a partially cross sectional view of another embodiment of the quick heating/ cooling device according to the present invention.
  • FIG. 4 is a partially sectional view of another further embodiment of the quick heating/cooling device according to the present invention.
  • FIG. 5 is a partially sectional view of another further embodiment of the quick heating/cooling device according to the present invention.
  • Fig. 7 is a schematic diagram of a temperature control system for cooling the injection mold according to the present invention. Best Mode for Carrying out the Invention
  • an apparatus for quickly heating or cooling an injection mold comprises a mold block (20) and a plurality of heater- mounting holes(22).
  • the mold block(20) has a cavity(24) where molten resin is injected and a plurality of heater-mounting holes(22) which are arranged laterally below the cavity(24) in such a manner that they are apart from each other.
  • Each of the heater-mounting holes(22) has an inlet at the one end of the heater-mounting hole(22) and an outlet at the other end.
  • a heater cartridge(30) is fitted into each heater-mounting hole(22) and thus serves to heat the mold block(20) selectively.
  • the heater cartridges(30) are supplied with electric powers and thus heated to radiate heat.
  • the heater cartridges (30) are not supplied with the electric power.
  • the electric heater cartridge(30) is detachably coupled into the heater-mounting hole(22) and has a heating element(32) spaced with the inner wall of the heater- mounting hole(22) to form a gap between its outer surface and the inner wall of the heater-mounting hole(22).
  • the heating element(32) has outer diameter smaller than the diameter of heater-mounting hole(22). This leads to form a passage together with the heater-mounting hole(22) in order to allow the heating/cooling fluid to pass through.
  • a fluid supply passage(40) which is connected in parallel to inlets of the heater-mounting holes(22) for supplying heating/cooling fluid into the heater-mounting holes (22).
  • a heating/cooling fluid passage(50) is formed in such a manner that the passage(50) travels all around the cavity(24) in the mold. Further, the heating/cooling fluid passage(50) is connected in parallel to outlets of the heater-mounting holes(22) to lead the heating/cooling fluid through the heater-mounting holes(22) in areas around the cavity(24).
  • the fluid supplied into the heater-mounting holes(22) is heated by the electric heating element(32) of the electric heater cartridge(30) while it passes through the passage in the heater-mounting holes(22). In this way, the fluid is heated to be converted into saturated vapor.
  • the saturated fluid enters into the heating/cooling fluid passage(50) and travels along the heating/cooling fluid passage(50) to heat the the mold block(20).
  • the heater cartridges (30) are not supplied with the electric power and therefore are kept unheated.
  • the fluid supplied into the heater- mounting holes(22) passes through the passage in the heater-mounting holes(22) as it is unheated and travels in the mold block along the heating/cooling fluid passage(50) to cool the mold block.
  • the fluid is heated over 100 0 C and thus converted into saturated vapor at pressure of 6-9 bar and temperature of 160-190 0 C.
  • the apparatus for quickly heating or cooling an injection mold comprises a plurality of temperature sensors (not shown) mounted around the cavity(24) for detecting the local temperatures around the cavity in the mold block and thus transmitting the signal corresponding to the detected local temperature, and a temperature controller(not shown) to selectively supply electric power to the electric heater cartridges according to the signals from the sensors.
  • the temperature controller transmits a signal to a power supply to supply electric power to the electric heater cartridges according to the signals from the sensors.
  • the electric heater cartridges(30) heat the fluid passing through the heater-mounting holes (22).
  • the heated fluid is supplied through the heating/cooling fluid passage(50) in the mold block to heat the mold block.
  • Figs 3 through 5 show embodiments of the quick heating/cooling device according to the present invention.
  • FIG. 3 shows another embodiment of the heater cartridge(30) fitted in the heater- mounting hole(22) of the mold block(20).
  • the heater cartridge(30) comprises a plurality of heat- transfer plates(60) arranged in a helix shape on the outer surface of the heating element(32).
  • the heat-transfer plates(60) are contact with the inner wall of the heater-mounting hole(22) to transfer heat of the heating element(32) to the inner wall.
  • the helix portions of the heat-transfer plates(60) form a helixed fluid passage between the helixed portions adjacent to each other.
  • the fluid flowed in the heater-mounting hole(22) passes through the helixed fluid passage. While the fluid passes through the helixed fluid passage, the fluid is heated by the heating element(32) and then flows in the heating/cooling fluid passage(50).
  • the heat-transfer plates(60) is of a thickness and a width and made of high thermal conductive material.
  • the heat-transfer plates(60) serve to transfer heat from the heating element(32) to the inner wall of the heater-mounting hole(22) and thus serve to quickly accomplish the process of heating the injection mold .
  • a heat-transfer sleeve(70) may be put on the heat-transfer plate(60) in order to enhance efficiency of heat transfer between the heating element(32) and the inner wall of the heater-mounting hole(22).
  • the heat- transfer sleeve(70) is made of high thermal conductive material.
  • FIGs. 6 and 7 are schematic diagrams of a temperature control system for heating and cooling the injection mold according to the present invention.
  • a heating mode as shown in Fig. 6 a first valve(6a) and a third valve(6c) are kept opened, but a forth valve(6d), a fifth valve(6e) and a sixth valve(6f) are kept closed.
  • fluid is supplied into a reservoir(2).
  • the fluid in the reservoir(2) is supplied into the heating/cooling apparatus(l) according to the present invention through a hot fluid conduit(4) for by a pump(3).
  • the fluid flowed in the eating/cooling apparatus(l) of the injection mold is heated by the heater cartridge(30) while it passes through the heater-mounting hole(22).
  • the present invention is used in various injection molds for plastic part.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

La présente invention se rapporte à un appareil servant à chauffer ou à refroidir rapidement un moule à injection à une température prédéfinie. L'appareil comprend une pluralité de trous de montage (22) d'éléments chauffants, une pluralité de cartouches chauffantes électriques (30) insérées dans le trou de montage (22) d'élément chauffant, un passage d'alimentation en fluide (40), et un passage pour fluide de chauffage/refroidissement (50), dans un bloc moule (20). Selon la présente invention, il est possible d'empêcher l'apparition de défauts, sur la partie moulée, dus à une différence de température et de raccourcir un temps de cycle du processus de moulage par injection.
PCT/KR2008/000254 2007-12-28 2008-01-15 Appareil pour chauffage et refroidissement rapides d'un moule à injection et procédé de régulation de la température du moule à injection WO2009084762A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2007-0139788 2007-12-28
KR20070139788 2007-12-28

Publications (1)

Publication Number Publication Date
WO2009084762A1 true WO2009084762A1 (fr) 2009-07-09

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ID=40824461

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2008/000254 WO2009084762A1 (fr) 2007-12-28 2008-01-15 Appareil pour chauffage et refroidissement rapides d'un moule à injection et procédé de régulation de la température du moule à injection

Country Status (2)

Country Link
KR (1) KR100975014B1 (fr)
WO (1) WO2009084762A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014022031A1 (fr) * 2012-07-31 2014-02-06 3M Innovative Properties Company Appareil et procédé de moulage par injection comprenant une surface de cavité de moule comprenant un groupement pouvant être commandé thermiquement
US8663537B2 (en) 2012-05-18 2014-03-04 3M Innovative Properties Company Injection molding apparatus and method
WO2014174292A1 (fr) * 2013-04-25 2014-10-30 Surface Generation Limited Gestion de transition de chaleur dans un outil de moulage
WO2020239873A1 (fr) 2019-05-28 2020-12-03 Rel8 Aps Procédé et appareil permettant de produire un code à barres dans un matériau moulable
CN113233743A (zh) * 2021-05-20 2021-08-10 广东华中科技大学工业技术研究院 一种玻璃热弯成型装置及方法

Families Citing this family (14)

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WO2011111986A2 (fr) * 2010-03-08 2011-09-15 주식회사 나다이노베이션 Moule ayant un élément poreux agencé conjointement avec un élément chauffant électrique et procédé et appareil permettant de chauffer/refroidir rapidement ce dernier
KR101157511B1 (ko) * 2010-05-24 2012-06-21 주식회사 나다이노베이션 성형용 금형 및 이를 갖는 성형 시스템
KR101125697B1 (ko) * 2010-12-20 2012-03-28 조국현 사출금형의 급속가열 및 냉각장치
KR102158581B1 (ko) * 2014-01-28 2020-09-22 삼성전자주식회사 금형 및 그 가공 방법
KR101997013B1 (ko) 2018-01-08 2019-07-05 오세윤 급속 가열 및 냉각 기능을 가지는 사출 성형 장치
KR102171537B1 (ko) * 2018-06-21 2020-10-29 지오네이션 주식회사 급가열 및 급냉각이 가능한 몰드를 이용한 수지 이송 성형방법
KR102228601B1 (ko) * 2018-06-29 2021-03-16 노형래 웰드라인 완화를 위한 차량 사출금형 모듈
KR102297322B1 (ko) 2019-09-24 2021-09-03 오세윤 급속 가열 및 냉각 금형 장치
KR102337777B1 (ko) * 2019-09-26 2021-12-09 주식회사 한셀테크 히팅지그조립체를 이용한 패널 접착용 프레싱 장치
KR102281821B1 (ko) 2020-01-17 2021-07-23 오세윤 압력 조절 및 온도 제어가 가능한 일체형 사출 성형 장치
KR102189813B1 (ko) * 2020-02-18 2020-12-11 김한규 단조금형에 적용되는 히팅유닛
KR102353579B1 (ko) * 2020-08-10 2022-01-21 (주)지케이에스 다단 제품용 분말 성형 장치
KR102427264B1 (ko) * 2020-09-25 2022-07-29 주식회사 한셀테크 히팅지그조립체를 이용한 패널 접착용 프레싱 장치
KR102470662B1 (ko) * 2021-12-17 2022-11-25 (주)서영 다단가압주조공법용 금형 온도 유지 시스템

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JPH06344438A (ja) * 1993-06-07 1994-12-20 Kubota Corp 受口付プラスチックパイプの成形方法
KR20070044251A (ko) * 2005-10-24 2007-04-27 삼성전자주식회사 금형장치와 금형용 히터 카트리지
KR20070076211A (ko) * 2006-01-18 2007-07-24 류갑성 발열체를 구비한 성형용 금형 시스템

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06344438A (ja) * 1993-06-07 1994-12-20 Kubota Corp 受口付プラスチックパイプの成形方法
KR20070044251A (ko) * 2005-10-24 2007-04-27 삼성전자주식회사 금형장치와 금형용 히터 카트리지
KR20070076211A (ko) * 2006-01-18 2007-07-24 류갑성 발열체를 구비한 성형용 금형 시스템

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8663537B2 (en) 2012-05-18 2014-03-04 3M Innovative Properties Company Injection molding apparatus and method
WO2014022031A1 (fr) * 2012-07-31 2014-02-06 3M Innovative Properties Company Appareil et procédé de moulage par injection comprenant une surface de cavité de moule comprenant un groupement pouvant être commandé thermiquement
WO2014174292A1 (fr) * 2013-04-25 2014-10-30 Surface Generation Limited Gestion de transition de chaleur dans un outil de moulage
CN105283288A (zh) * 2013-04-25 2016-01-27 表面制作有限公司 铸模工具热转移管理技术
US10081121B2 (en) 2013-04-25 2018-09-25 Surface Generation Limited Mould tool heat transition management
WO2020239873A1 (fr) 2019-05-28 2020-12-03 Rel8 Aps Procédé et appareil permettant de produire un code à barres dans un matériau moulable
CN113233743A (zh) * 2021-05-20 2021-08-10 广东华中科技大学工业技术研究院 一种玻璃热弯成型装置及方法

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Publication number Publication date
KR100975014B1 (ko) 2010-08-09
KR20090072901A (ko) 2009-07-02

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