WO2017030333A1 - Moule d'injection à diffusion thermique rapide - Google Patents

Moule d'injection à diffusion thermique rapide Download PDF

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Publication number
WO2017030333A1
WO2017030333A1 PCT/KR2016/008941 KR2016008941W WO2017030333A1 WO 2017030333 A1 WO2017030333 A1 WO 2017030333A1 KR 2016008941 W KR2016008941 W KR 2016008941W WO 2017030333 A1 WO2017030333 A1 WO 2017030333A1
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WO
WIPO (PCT)
Prior art keywords
core
thermal
thermal diffusion
spreader
injection mold
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Application number
PCT/KR2016/008941
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English (en)
Korean (ko)
Inventor
장재익
장진숙
황인기
Original Assignee
(주)우리텍
에너진(주)
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Application filed by (주)우리텍, 에너진(주) filed Critical (주)우리텍
Publication of WO2017030333A1 publication Critical patent/WO2017030333A1/fr

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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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
    • F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes

Definitions

  • the present invention relates to a rapid thermal diffusion injection mold, and in particular, the heat spreader (heating means / cooling means) provided in the core by forming a heat spreader (Heat Spreader) maximizing the thermal conductivity inside the core of the injection mold and the cavity of the core surface Rapid heat conduction between cavities prevents the occurrence of weld lines, sink marks, warpage, voids, crazing, and mold release defects.
  • the present invention relates to a rapid thermal diffusion injection mold that ultimately shortens the cycle time for producing a product, thereby improving productivity and significantly reducing equipment and maintenance costs.
  • Steam-Mold is an injection mold that forms a product in a state in which the core is heated with high temperature steam, and then cools the core with cooling water to solidify the previously formed product, and then is taken out. It is 120 ° C using steam. Since the core is heated above, the surface of the product can be formed with high gloss without post-processing such as painting or plating, and defects such as weld lines can be prevented.
  • FIG. 1 schematically shows a Rapid Heat Cycle Molding (RHCM) mold as an example of the steam mold.
  • the steam line 110 and the cooling line 120 are formed in the core 100a, respectively.
  • the core 100a is heated by supplying steam at 150 ° C. to the steam line 110 using a provided boiler, and when cooling the core 100a, the cooling water is circulated to the cooling line 120 to solidify the product. And then take out.
  • the cooling line 120 is formed closer to the cavity (C) of the core (100a) than the steam line (110), because it usually takes more time to cool than heating the core (100a).
  • one example of the steam mold is that the cooling water 120 is present inside the cooling line 120 when the core 100a is heated, thereby increasing the thermal volume to be heated, thereby delaying the heating time of the core 100a and causing unnecessary heat loss.
  • the cooling time is also delayed due to the steam remaining in the steam line 110.
  • the steam mold shown in FIG. 1B is another example of the RHCM mold which improves the disadvantages of the above-described example, and forms a steam / cooling water combined line 150 that combines heating and cooling in the core 100b.
  • steam is introduced into the combined line 150, and when the core 100b is cooled, compressed air is injected into the combined line 150 to discharge steam first, and then cooling water is introduced. To cool the core 100b.
  • the improved RHCM mold is known to reduce the boiler operating cost of approximately 75% compared to the conventional RHCM mold in which the steam line and the cooling line are separated.
  • E-Mold is an injection mold that heats a core using an electric heater and cools the core by using a coolant, and as shown in FIG. 2, a heating core 201 having an electric heater 210 is provided. And the cooling core 202 having the cooling water pipe 220 formed thereon, and the core 200 of the injection mold is formed.
  • the heating core 201 and the cooling core 202 are separated to reduce the thermal volume required for injection, thereby rapidly heating the cavity C, and the cavity C
  • the cooling core 202 is brought into close contact with the heating core 201 so that the core 200 is cooled.
  • the core 200 can be heated at 150 ° C to 350 ° C, which is suitable for injection molding of high gloss unpainted products. .
  • the thermal means (T) formed in the core of the conventional injection mold is formed with a plurality of lines spaced apart (see FIGS. 3 and 4), as well as the temperature deviation in each line of the spaced thermal means (T),
  • the thermal means T includes heating means (steam line, electric heater) and cooling means (cooling line, cooling water pipe) or a combined line.
  • the core of the injection mold according to the prior art forms a thermal means (T) with a thickness of 8mm ⁇ 14mm in the cavity (C) in order not to deform the product by the injection pressure and the clamping force (see Fig. 4),
  • the thermal conduction is delayed by the thickness between the cavity C and the thermal means T, which leads to the delay of the cycle time of producing the product, which is a major cause of the productivity decrease.
  • the thermal energy of the thermal means (T) is also conducted to the core plate side while the heat conduction between the thermal means (T) and the cavity (C) formed in the core of the conventional injection mold is lost (see FIGS. 3 and 4).
  • the cycle time is delayed due to the loss of heat energy, resulting in an increase in operating costs such as boilers due to the loss of heat energy.
  • the problem of the conventional injection mold as described above causes a bigger problem in accordance with the recent trend of the enlargement of the display device, the reason is that the top cover and cover cover ( When the width of the cover bottom and the support main increases, the volume of the injection mold that produces it greatly increases compared to the volume increase of the injection molded product, which not only causes the enlargement of the production equipment such as an injection machine, but also the enlargement of the mold. This is because the increase in the thermal volume increases the problem of the injection mold related to the heat conduction, and the productivity decrease due to the delay of the cycle time becomes more serious.
  • Patent Document 0001 Registered Patent Publication No. 10-0644920 (March 10, 2006)
  • the present invention is to solve the conventional problems as described above, to enable rapid heat conduction between the thermal means (heating means / cooling means) formed in the core of the injection mold and the cavity formed on the surface of the core, the inside of the cavity It is possible to maintain the thermal equilibrium quickly, and on the other hand, by blocking the heat conducted to the core plate and other heat conduction between the cavity and the thermal means, ultimately shortening the cycle time to produce the product to improve productivity
  • the cavity 15 is formed on one side and the other side is fixed to the core plate 5 and the core having a thermal means 25 therein (
  • the core 1 is formed by dividing the first core 10 having the cavity 15 and the second core 20 having the thermal means 25 formed therein.
  • a thermal diffusion spreader 30 having better thermal conductivity than the material of the core 1, and the thermal diffusion spreader 30 intervened;
  • the core 1 can be rapidly heated and rapidly cooled to improve productivity, and the cavity 15 can be thermally balanced to improve the quality of the finished product. It is characterized by the construction of a rapid thermal diffusion injection mold.
  • the present invention is formed by dividing the thermal means 25 formed in the second core 20 into a heating means 25a made of an electric heater or a steam line and a cooling line 25b through which cooling water is circulated, or There is another feature of the configuration of the rapid thermal diffusion injection mold formed by the steam / cooling water combined line 25c into which steam and cooling water are alternately introduced.
  • the present invention is configured to bend both sides of the thermal diffusion spreader 30 so as to approach or touch the thermal means 25, and the wick inside the housing 31 of the thermal diffusion spreader 30 is a vacuum 32, a built-in Wick and heat medium is filled, and a support 33 for reinforcing the housing 31 of the thermal diffusion spreader 30 is formed in the rapid thermal diffusion injection mold of the configuration further formed in the housing 31
  • the wick inside the housing 31 of the thermal diffusion spreader 30 is a vacuum 32, a built-in Wick and heat medium is filled, and a support 33 for reinforcing the housing 31 of the thermal diffusion spreader 30 is formed in the rapid thermal diffusion injection mold of the configuration further formed in the housing 31
  • the present invention covers the heat insulating material 40 on the outer surface of the first core 10 and the second core 20 integrated with the diffusion diffusion (Diffusion Bonding) through the thermal diffusion spreader 30 to the diffusion bonding
  • diffusion diffusion diffusion Bonding
  • the heat energy of the heating means is rapidly transferred to the cavity through the heat diffusion spreader when the core is heated, not only rapid heating of the core is possible, but also heat energy of the cavity is rapidly cooled when the core is cooled.
  • the core can be rapidly cooled, allowing it to cool rapidly. Therefore, the cycle time of product production is shortened, thereby maximizing productivity.
  • the resin flows smoothly during molding, and uniform solidification of the resin during cooling is possible.
  • the resin flows smoothly during molding, and uniform solidification of the resin during cooling is possible.
  • the quality of the product has the effect of preventing defects.
  • the heat energy flow is restricted to the core plate with a relatively high thermal resistance, and consequently, the effect of reducing the thermal volume can be expected.
  • 1 and 2 are cross-sectional views showing a schematic configuration of a conventional injection mold
  • Figure 3 is a schematic diagram showing a planar configuration of the thermal means of the conventional injection mold
  • FIG. 5 is a cross-sectional view showing the configuration and thermal diffusion state of the rapid thermal diffusion injection mold according to the invention
  • 6A to 6C are cross-sectional views showing respective embodiments of the rapid thermal diffusion injection mold according to the present invention.
  • FIG. 7 is a cross-sectional view showing an internal configuration of a thermal diffusion spreader in the present invention.
  • Figure 8 is a comparison picture of testing the thermal conductivity of the thermal diffusion spreader in the present invention
  • Figure 9 is a schematic diagram showing the configuration of the diffusion bonding in the present invention.
  • a cavity 15 for forming an injection product is formed on one surface of the core 1, and the bottom of the other side of the core 1 has a core plate 5.
  • a thermal means 25 is formed inside the core 1.
  • the thermal means 25 is illustrated as a steam line in FIG. 5 to be easily compared with FIG. 4 showing a conventional injection mold, but the thermal means 25 in the present invention is heated by an electric heater in addition to the steam line.
  • the characteristic configuration of the core 1 is to form a thermal diffusion spreader 30 between the cavity 15 and the thermal means 25 of the core 1, the thermal diffusion spreader 30 is As the plate has a better thermal conductivity than the material, it is formed close to the lower side of the cavity 15 to enable rapid heating and rapid cooling of the cavity 15 and to maintain a rapid thermal equilibrium inside the cavity 15 to complete the product. To improve the quality of the product and to prevent defects.
  • the thermal energy supplied from the thermal means 25 is higher than the lower side of the thermal means 25.
  • the thermal energy of the thermal means 25 is preferentially conducted to the cavity 15 side where the thermal diffusion spreader 30 is formed rather than the core plate 5 side, which has a relatively large thermal resistance, and the thermal resistance is low, and the core 1 as a whole.
  • the thermal energy to be recovered is less than that of the case where the entire core 1 is heated. Cooling is possible.
  • the thermal diffusion spreader 30 of the present invention is formed long in the form of a plate on the lower side of the cavity 15, the thermal energy is rapidly conducted horizontally as well as the vertical thermal conductivity (see FIG. 8). According to the horizontal heat conduction of the thermal diffusion spreader 30, the thermal equilibrium state of the entire inside of the cavity 15 can be quickly maintained in spite of the temperature variation of the inlet and outlet sides of the thermal means 25.
  • the flow of the resin is constant, and when the core 1 is cooled, uniform cooling of the resin is possible, thereby improving the quality of the finished product and preventing defects.
  • the core 1 is a first core 10 having a cavity 15 and a second core having the thermal means 25 ( 20), wherein the first core 10 and the second core 20 are integrated in a state in which a thermal diffusion spreader 30 is interposed between the first core 10 and the second core 20. do.
  • the thermal means 25 formed in the second core 20, as shown in each embodiment of Figure 6 is a heating line 25a consisting of an electric heater or steam line and the cooling line 25b through which the cooling water circulates.
  • a heating line 25a consisting of an electric heater or steam line and the cooling line 25b through which the cooling water circulates.
  • the present invention may be bent to approach or contact the thermal means 25 by bending both ends of the thermal diffusion spreader 30 as shown in the drawings (see FIGS. 6A and 6B), or shown in the drawings.
  • the shape of the thermal diffusion spreader 30 may be bent or curved to correspond to the shape of the cavity 15 to form a stepped shape or a waveform.
  • the thermal diffusion spreader 30 may be formed as a single unit having excellent thermal conductivity, but it is preferable to use the principle of the heat pipe (heatpipe),
  • the inside of the housing 31 formed in a thin and long plate shape is formed in a vacuum, and the housing 31 has a wick 32 (Wick), which is a core of a mesh form, in the housing 31.
  • the inside of the thermal medium to transfer heat energy (water, alcohol, refrigerant gas, etc.) is filled to form a thermal diffusion spreader (30).
  • the thermal diffusion spreader 30 configured as described above, after the heat medium is heated and vaporized on one side of the housing 31 decompressed by vacuum, the heat medium vaporized to the other side of the housing 31 is radiated while transferring heat energy.
  • the released heat medium can be liquefied to maximize the thermal conductivity by repeating the circulation through the wick 32 to the original position by the capillary phenomenon.
  • the thermal diffusion spreader 30 is a metal having excellent thermal conductivity and is made of aluminum and copper plates. It can be confirmed through the experimental photograph of FIG. 8 that the thermal conductivity is much better than that shown in FIG. 8.
  • thermal diffusion spreader 30 is formed close to the lower side of the cavity 15 to form a thin so that the product is not deformed by the injection pressure and the clamping force during the molding of the injection product, or inside the thermal diffusion spreader 30 It is preferable to further form a support 33 such as a post or honeycomb structure so as to cope with the injection pressure during molding of the injection molded product, but the present invention is not limited to the shape of the support 33.
  • the first core 10 and the second core 20 integrated with the thermal diffusion spreader 30 is preferably integrated by diffusion bonding.
  • the diffusion bonding is a technology for bonding the dissimilar materials to each other at high temperature and high pressure in a vacuum state, as shown in Figure 9, the detailed technical configuration is protected by trade secrets, based on high technical experience, By the diffusion bonding, the first core 10, the second core 20, and the thermal diffusion spreader 30 may be physically completely integrated to minimize thermal resistance.
  • the present invention further covers the heat insulating material 40 on the outer surfaces of the first core 10 and the second core 20 integrated with the diffusion diffusion by the thermal diffusion spreader 30 to cover the diffusion bonding.
  • the core 1 has a core in addition to the first core 10 and the second core 20, including the cavity 15, the thermal means 25, and the thermal diffusion spreader 30, as shown in FIG. 6.
  • the part fixed to the plate 5 is formed separately.
  • the thermal energy is rapidly transferred through the thermal diffusion spreader 30. Not only can the core 1 be rapidly heated, but also the core 1 can be rapidly cooled because the thermal energy of the cavity 15 is quickly recovered through the thermal diffusion spreader 30 even when the core 1 is cooled. Do.
  • the flow of the resin during the heating of the core 1 is smooth, while the cooling of the resin Since it enables uniform solidification, it can improve the quality of injection products and prevent defects.
  • the heat insulator 40 into the core 1 to block the conduction of thermal energy to the core plate 5, it is possible to shorten the cycle time and improve the energy efficiency to reduce maintenance costs.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Fluid Mechanics (AREA)

Abstract

La présente invention concerne un moule d'injection à diffusion thermique rapide et, plus spécifiquement, un moule d'injection à diffusion thermique rapide dans lequel une cavité (15) et un moyen thermique (25) sont formées dans un noyau (1) d'un moule d'injection, le noyau (1) étant divisé en un premier noyau (10) avec la cavité (15) et en un second noyau (2) avec le moyen thermique (25) ; un dissipateur thermique (30) est formé entre le premier noyau (10) et le second noyau (20), le dissipateur thermique (30) présentant une conductibilité thermique plus excellente que le matériau du noyau (1), de telle sorte que le premier noyau (10) avec le dissipateur thermique (30) incorporé dans celui-ci et le second noyau (20) sont intégrés par liaison par diffusion et ainsi l'énergie thermique est transférée rapidement à la cavité (15) ou au moyen thermique (25) par le biais du dissipateur thermique (30) pendant le chauffage et le refroidissement du noyau (1). Grâce à cette caractéristique, il est possible de réduire le temps de cycle de production et de maximiser en conséquence la productivité. En outre, l'écoulement d'une résine à l'intérieur de la cavité (15) est maintenu uniforme par une action d'équilibre thermique horizontale du dissipateur thermique (30) de telle sorte que la qualité d'un produit moulé est améliorée et le rendement énergétique peut être augmenté par le guidage de l'écoulement d'énergie thermique à la cavité (15) tout en arrêtant celui-ci à partir d'une plaque de noyau.
PCT/KR2016/008941 2015-08-19 2016-08-12 Moule d'injection à diffusion thermique rapide WO2017030333A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020150116405A KR101623030B1 (ko) 2015-08-19 2015-08-19 급속 열확산 사출금형
KR10-2015-0116405 2015-08-19

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WO2017030333A1 true WO2017030333A1 (fr) 2017-02-23

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113334716A (zh) * 2021-07-21 2021-09-03 刘浩权 一种塑胶模具快速冷却装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11149975A (ja) * 1997-11-13 1999-06-02 Kyushu Nissho:Kk ブロック状構造体における構造体表面の均等熱分布化構造
JP2000000826A (ja) * 1998-06-15 2000-01-07 Kao Corp 成形金型
KR100794503B1 (ko) * 2006-07-14 2008-01-16 임채복 선택적 단열층을 포함하는 고분자수지 성형용 금형 및 이를이용한 성형 방법
KR20110027406A (ko) * 2009-09-10 2011-03-16 강환국 급속 온도 조절 장치를 포함하는 사출 성형 장치
KR20150066725A (ko) * 2013-12-09 2015-06-17 (주)신명정보통신 온도를 일정하게 유지하는 금형장치

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11149975A (ja) * 1997-11-13 1999-06-02 Kyushu Nissho:Kk ブロック状構造体における構造体表面の均等熱分布化構造
JP2000000826A (ja) * 1998-06-15 2000-01-07 Kao Corp 成形金型
KR100794503B1 (ko) * 2006-07-14 2008-01-16 임채복 선택적 단열층을 포함하는 고분자수지 성형용 금형 및 이를이용한 성형 방법
KR20110027406A (ko) * 2009-09-10 2011-03-16 강환국 급속 온도 조절 장치를 포함하는 사출 성형 장치
KR20150066725A (ko) * 2013-12-09 2015-06-17 (주)신명정보통신 온도를 일정하게 유지하는 금형장치

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113334716A (zh) * 2021-07-21 2021-09-03 刘浩权 一种塑胶模具快速冷却装置

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