WO2012158659A1 - Contact partiel entre un bloc chauffant et un ensemble collecteur à canaux chauffés - Google Patents

Contact partiel entre un bloc chauffant et un ensemble collecteur à canaux chauffés Download PDF

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Publication number
WO2012158659A1
WO2012158659A1 PCT/US2012/037867 US2012037867W WO2012158659A1 WO 2012158659 A1 WO2012158659 A1 WO 2012158659A1 US 2012037867 W US2012037867 W US 2012037867W WO 2012158659 A1 WO2012158659 A1 WO 2012158659A1
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WO
WIPO (PCT)
Prior art keywords
assembly
heater
hot
manifold
slots
Prior art date
Application number
PCT/US2012/037867
Other languages
English (en)
Inventor
Paul R. Blais
Angelo Mier
Brian Esser
Original Assignee
Husky Injection Molding Systems Ltd
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
Application filed by Husky Injection Molding Systems Ltd filed Critical Husky Injection Molding Systems Ltd
Publication of WO2012158659A1 publication Critical patent/WO2012158659A1/fr

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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
    • B29C45/73—Heating or cooling of the mould
    • B29C45/7331—Heat transfer elements, e.g. heat pipes

Definitions

  • An aspect generally relates to (but is not limited to) a mold-tool system and/or a molding system having the mold-tool system.
  • the inventors have researched a problem associated with known molding systems that inadvertently manufacture bad-quality molded articles or parts. After much study, the inventors believe they have arrived at an understanding of the problem and its solution, which are stated below, and the inventors believe this understanding is not known to the public.
  • the current problem is that electrical resistive heater assemblies supply a fixed wattage per linear length of the heater assembly.
  • Known installation method depends on installing the heater assembly to have good thermal conductance to a manifold of a runner assembly. This arrangement may improve heat transfer.
  • heat transfer is a two way street, not only does the above arrangement improve heat going out to the manifold from the heater assembly, but the above arrangement may also improve cooling of the heater assembly at the location of heat losses.
  • the temperature of the electric heater is to be independent of the temperature of the manifold.
  • the next best case may be to limit the effect of the manifold temperature on the temperature of the heater assembly.
  • the solution may reduce, at least in part, heat transfer by conduction and/or may improve heat transfer by radiation.
  • Radiative heat transfer is a function of the fourth power of temperature difference between two bodies (using an absolute scale), and thus is much higher for larger differences in temperature. This then acts as a partially self-regulating heat transfer mode, as the amount of heat transferred increases dramatically as the temperature differential increases, and correspondingly decreases as the temperature differential decreases.
  • a mold- tool system comprising: a partial-contacting means (106) for partially contacting a heater assembly (104) with a hot-runner manifold assembly (102).
  • a mold-tool system comprising: a hot-runner manifold assembly (102); a heater assembly (104); and a partial-contacting means (106) for partially contacting the heater assembly (104) with the hot-runner manifold assembly (102).
  • a mold- tool system comprising: a hot-runner manifold assembly (102); and a heater assembly (104), the hot-runner manifold assembly (102) and the heater assembly (104) being in partial contact with each other.
  • a method comprising: partially contacting a heater assembly (104) with a hot-runner manifold assembly (102).
  • the mold-tool system (100) may improve heat transfer and may decrease power draw, and may improve thermal uniformity.
  • FIGS. 1 to 15 depict schematic representations of examples of a mold-tool system (100).
  • FIGS. 1 to 15 depict the schematic representations of the examples of the mold-tool system (100).
  • the mold-tool system (100) may include components that are known to persons skilled in the art, and these known components will not be described here; these known components are described, at least in part, in the following reference books (for example): (i) Injection Molding Handbook authored by OSSWALD/TURNG/GRAMANN (ISBN: 3- 446-21669-2), (ii) "Injection Molding Handbook authored by ROSATO AND ROSATO (ISBN: 0-412-99381 -3), (iii) "Injection Molding Systems” 3 rd Edition authored by JOHANNABER (ISBN 3-446-1 7733-7) and/or (iv) "Runner and Gating Design Handbook authored by BEAUMONT (ISBN 1 -446-22672-9).
  • the phrase “includes (and is not limited to)” is equivalent to the word “comprising”.
  • the word “comprising” is a transitional phrase or word that links the preamble of a patent claim to the specific elements set forth in the claim that define what the invention itself actually is.
  • the transitional phrase acts as a limitation on the claim, indicating whether a similar device, method, or composition infringes the patent if the accused device (etc) contains more or fewer elements than the claim in the patent.
  • the word “comprising” is to be treated as an open transition, which is the broadest form of transition, as it does not limit the preamble to whatever elements are identified in the claim.
  • the definition of the mold-tool system (100) is as follows: a system that may be positioned and/or may be used in an envelope defined by a platen system of the molding system (known and not depicted), such as an injection-molding system for example.
  • the platen system may include (and is not limited to) a stationary platen and a movable platen that is moveable relative to the stationary platen.
  • a molding system may include (and is not limited to) the mold-tool system (100).
  • the mold-tool system (100) includes (and is not limited to): a partial-contacting means (106) for partially contacting a heater assembly (104) with a hot-runner manifold assembly (102). Examples of the partial-contacting means (106) are described below and depicted in the FIGS.
  • the mold-tool system (100) includes (and is not limited to): a hot-runner manifold assembly (102), a heater assembly (104), and a partial-contacting means (106) for partially contacting the heater assembly (104) with the hot-runner manifold assembly (102). Examples of the partial-contacting means (106) are described below and depicted in the FIGS.
  • the partial-contacting means (106) may provide effective contact between the hot-runner manifold assembly (102) and the heater assembly (104) is reduced by at least 25% as a result of the hot-runner manifold assembly (102) and the heater assembly (104) being in partial contact with each other, in comparison to a case in which the hot-runner manifold assembly (102) and the heater assembly (104) are in normal contact with each other.
  • the mold-tool system (100) includes (and is not limited to): a hot-runner manifold assembly (102), and a heater assembly (104), in which the hot-runner manifold assembly (102) and the heater assembly (104) are in partial contact with each other. Examples of the manner in which the hot-runner manifold assembly (102) and the heater assembly (104) are in partial contact with each other are described below and depicted in the FIGS.
  • effective contact between the hot-runner manifold assembly (102) and the heater assembly (104) may be reduced by at least 25% as a result of the hot-runner manifold assembly (102) and the heater assembly (104) being in partial contact with each other, in comparison to a case in which the hot-runner manifold assembly (102) and the heater assembly (104) are in normal contact with each other.
  • a method includes (and is not limited to): partially contacting a heater assembly (104) with a hot-runner manifold assembly (102).
  • the method may further include (and is not limited to): reducing effective contact between the hot-runner manifold assembly (102) and the heater assembly (104) by at least 25% as a result of the hot-runner manifold assembly (102) and the heater assembly (104) being in partial contact with each other, in comparison to a case in which the hot-runner manifold assembly (102) and the heater assembly (104) are in normal contact with each other.
  • the heater assembly (104) includes (and is not limited to): (i) an outer surface (112), and (ii) outer-surface heater crests (113).
  • the outer surface (112) defines heater slots (110).
  • the heater slots (110) face, at least in part, the hot-runner manifold assembly (102).
  • the outer-surface heater crests (113) extend from the heater assembly (104) toward the hot-runner manifold assembly (102).
  • the outer-surface heater crests (113) are positioned between the heater slots (110).
  • the outer-surface heater crests (113) and the heater slots (110) are arranged relative to each other so as to reduce the effective contact between the heater assembly (104) and the hot-runner manifold assembly (102). It will be appreciated that meaning of the heater slots (110) may include one or more heater slots (110), and that the meaning of the outer-surface heater crests (113) may include one or more outer-surface heater crests (113). Specifically, in accordance with FIGS.
  • the partial-contacting means (106) includes (and is not limited to): (i) the outer surface (112) of the heater assembly (104), and (ii) the outer-surface heater crests (113), in which the outer-surface heater crests (113) and the heater slots (110) are arranged relative to each other so as to reduce the effective contact between the heater assembly (104) and the hot-runner manifold assembly (102).
  • the heater slots (110) include (and are not limited to) radial-heater slots (111 ).
  • the heater slots (110) are aligned, at least in part, radially relative to a longitudinal axis (105) extending, at least in part, through the heater assembly (104).
  • the heater slots (110) include (and are not limited to): axial-heater slots (114).
  • the axial-heater slots (114) are aligned, at least in part, axially relative to a longitudinal axis (105) extending, at least in part, through the heater assembly (104).
  • FIG. 3 there is depicted another variant of the heater slots (110) by way of another example.
  • the heater slots (110) include (and is not limited to): concave-heater dimples (109) that extend, at least in part, into the body of the heater assembly (104).
  • the heater slots (110) include (and are not limited to): a combination (not depicted) of both the radial-heater slots (111 ) and the axial-heater slots (114), (ii) the heater slots (110) include (and are not limited to) non-radial heater slots (not depicted), (iii) the heater slots (110) include (and are not limited to) non-axial heater slots (not depicted), and (iv) the heater slots (110) include (and are not limited to) a combination (both not depicted) of non-radial heater slots and/or non-axial heater slots,
  • the hot-runner manifold assembly (102) includes (and is not limited to): (i) an outer-manifold surface (120), and (ii) outer-surface crests (115).
  • the outer- manifold surface (120) defines a manifold-heater groove (118) and manifold slots (116) formed in the manifold-heater groove (118).
  • the manifold slots (116) face, at least in part, the heater assembly (104).
  • the outer-surface crests (115) extend from the hot-runner manifold assembly (102) toward the heater assembly (104).
  • the manifold slots (116) are positioned between outer-surface crests (115).
  • the manifold slots (116) and the outer- surface crests (115) are arranged relative to each other so as to reduce the effective contact between the heater assembly (104) and the hot-runner manifold assembly (102). It will be appreciated that meaning of the manifold slots (116) may include one or more manifold slots (116), and that the meaning of the outer-surface crests (115) may include one or more outer- surface crests (115).
  • the partial-contacting means (106) includes (and is not limited to): (i) the outer-manifold surface (120), and (ii)the outer-surface crests (115), and the manifold slots (116) and the outer-surface crests (115) are arranged relative to each other so as to reduce the effective contact between the heater assembly (104) and the hot-runner manifold assembly (102).
  • the manifold slots (116) include (and is not limited to) radial-manifold slots (117).
  • the radial-manifold slots (117) are aligned, at least in part, radially relative to a longitudinal axis (107) of the manifold-heater groove (118) of the hot-runner manifold assembly (102).
  • the manifold slots (116) include (and is not limited to) axial-manifold slots (122).
  • the axial-manifold slots (122) are aligned, at least in part, axially relative to a longitudinal axis (107) of the manifold-heater groove (118) of the hot-runner manifold assembly (102).
  • the manifold slots (116) include (and are not limited to): bosses (128) located in the manifold-heater groove (118).
  • the bosses (128) are positioned between boss crests (130).
  • the boss crests (130) face, at least in part, the heater assembly (104).
  • the manifold slots (116) include (and are not limited to): concave-manifold dimples (129) located in the manifold-heater groove (118).
  • the concave-manifold dimples are not limited to.
  • the manifold slots (116) include (and are not limited to) a manifold-heater groove (118) defined by the hot-runner manifold assembly (102).
  • the manifold-heater groove (118) is arranged (or shaped) to reduce the effective contact between the heater assembly (104) and the hot-runner manifold assembly (102).
  • the manifold slots (116) include (and are not limited to): a combination (not depicted) of both the radial-manifold slots (117) and the axial-manifold slots (122), (ii) the manifold slots (116) include (and are not limited to): non-radial manifold slots (not depicted), (iii) the manifold slots (116) include (and are not limited to): non-axial manifold slots (not depicted), and (iv) the manifold slots (116) include (and are not limited to): a combination (not depicted) of non-radial manifold slots and/or non-axial manifold slots.
  • the intermediate assembly (124) contacts, at least in part, the heater assembly (104) and the hot-runner manifold assembly (102).
  • the intermediate assembly (124) is arranged so as to reduce the effective contact between the heater assembly (104) and the hot-runner manifold assembly (102). It will be appreciated that meaning of the intermediate assembly (124) may include one or more of the intermediate assembly (124).
  • the partial-contacting means (106) includes (and is not limited to): the intermediate assembly (124)arranged so as to reduce the effective contact between the heater assembly (104) and the hot-runner manifold assembly (102).
  • the intermediate assembly (124) is contemplated.
  • the intermediate assembly (124) includes (and is not limited to) a wire assembly (125).
  • the wire assembly (125) surrounds, at least in part, the heater assembly (104).
  • the intermediate assembly (124) includes (and is not limited to) a wire- mesh assembly (126).
  • the wire-mesh assembly (126) surrounds, at least in part, the heater assembly (104).
  • the intermediate assembly (124) includes (and is not limited to) a spacer structure (132), such as a set of spacer rings for example.
  • the spacer structure (132) is positioned, at least in part, between the heater assembly (104) and the hot-runner manifold assembly (102).
  • the spacer structure (132) surrounds, at least in part, the heater assembly (104).
  • the spacer structure (132) contacts, at least in part, the heater assembly (104) and the hot-runner manifold assembly (102).
  • the spacer structure (132) reduce the effective contact between the hot-runner manifold assembly (102) and the heater assembly (104).
  • the intermediate assembly (124) includes (and is not limited to) convex-heater dimples (134).
  • the convex-heater dimples (134) extend from an outer surface (112) of the heater assembly (104).
  • the convex-heater dimples (134) face, at least in part, the hot-runner manifold assembly (102).
  • the convex-heater dimples (134) contact, at least in part, the hot-runner manifold assembly (102).
  • the intermediate assembly (124) includes (and is not limited to) convex-manifold dimples (136).
  • the convex-manifold dimples (136) extend from an outer- manifold surface (120) of the hot-runner manifold assembly (102).
  • the convex-manifold dimples (136) are located in a manifold-heater groove (118) defined by the hot-runner manifold assembly (102).
  • the convex-manifold dimples (136) extend from the hot-runner manifold assembly (102) toward the heater assembly (104).
  • the convex-manifold dimples (136) face, at least in part, the heater assembly (104).
  • the convex-manifold dimples (136) contact, at least in part, the heater assembly (104).
  • the intermediate assembly (124) includes a spring-clip structure (138).
  • the spring-clip structure (138) is configured to suspend the heater assembly (104) in a manifold-heater groove (118).
  • the spring-clip structure (138) is positioned, at least in part, between the heater assembly (104) and the hot-runner manifold assembly (102).
  • the spring- clip structure (138) is positioned, at least in part, in the manifold-heater groove (118) of the hot-runner manifold assembly (102).
  • the spring-clip structure (138) surrounds, at least in part, the heater assembly (104).
  • the spring-clip structure (138) contacts, at least in part, the heater assembly (104) and the hot-runner manifold assembly (102).
  • the intermediate assembly (124) includes (and is not limited to) a combination (not depicted) of a wire assembly (125) and a wire-mesh assembly (126), (ii) the intermediate assembly (124) includes (and is not limited to) a non-wire assembly (not depicted), (iii) the intermediate assembly (124) includes (and is not limited to) a non wire- mesh assembly (not depicted), and (iv) the intermediate assembly (124) includes (and is not limited to) a combination (not depicted) of a non-wire assembly and a non wire-mesh assembly.
  • the mold-tool system (100) of any example, option or variation described above may further include (and is not limited to) a component (140).
  • the component (140) is configured to reduce radiative heat transfer, from the heater assembly (104), to objects other than the hot-runner manifold assembly (102).
  • the partial-contacting means (106) may further include: the component (140).
  • the component (140) may include (and is not limited to): a cover (142) positioned over a manifold-heater groove (118) defined by the hot-runner manifold assembly (102).
  • a mold-tool system comprising: a partial-contacting means (106) for partially contacting a heater assembly (104) with a hot-runner manifold assembly (102).
  • a mold-tool system comprising: a hot-runner manifold assembly (102); a heater assembly (104); and a partial-contacting means (106) for partially contacting the heater assembly (104) with the hot-runner manifold assembly (102).
  • a mold- tool system comprising: a hot-runner manifold assembly (102); and a heater assembly (104), the hot-runner manifold assembly (102) and the heater assembly (104) being in partial contact with each other.
  • the mold-tool system (100) of any clause mentioned in this paragraph wherein: the heater assembly (104) includes: an outer surface (112) defining heater slots (110), the heater slots (110) facing, at least in part, the hot-runner manifold assembly (102); and outer-surface heater crests (113) extending from the heater assembly (104) toward the hot- runner manifold assembly (102), the outer-surface heater crests (113) being positioned between the heater slots (110), wherein the outer-surface heater crests (113) and the heater slots (110) are arranged relative to each other so as to reduce the effective contact between the heater assembly (104) and the hot-runner manifold assembly (102).
  • the partial-contacting means (106) includes: an outer surface (112) of the heater assembly (104) defining heater slots (110), the heater slots (110) facing, at least in part, the hot- runner manifold assembly (102); and outer-surface heater crests (113) extending from the heater assembly (104) toward the hot-runner manifold assembly (102), the outer-surface heater crests (113) being positioned between the heater slots (110), and the outer-surface heater crests (113) and the heater slots (110) are arranged relative to each other so as to reduce the effective contact between the heater assembly (104) and the hot-runner manifold assembly (102).
  • the hot-runner manifold assembly (102) includes: an outer- manifold surface (120), the outer-manifold surface (120) defining a manifold-heater groove (118) and manifold slots (116) being formed in the manifold-heater groove (118), the manifold slots (116) facing, at least in part, the heater assembly (104); and outer-surface crests (115) extending from the hot-runner manifold assembly (102) toward the heater assembly (104), the manifold slots (116) being positioned between outer-surface crests (115), and the manifold slots (116) and the outer-surface crests (115) are arranged relative to each other so as to reduce the effective contact between the heater assembly (104) and the hot-runner manifold assembly (102).
  • the partial-contacting means (106) includes: an outer-manifold surface (120) of the hot-runner manifold assembly (102), the outer- manifold surface (120) defining a manifold-heater groove (118) and manifold slots (116) being formed in the manifold-heater groove (118), the manifold slots (116) facing, at least in part, the heater assembly (104); and outer-surface crests (115) extending from the hot- runner manifold assembly (102) toward the heater assembly (104), the manifold slots (116) being positioned between outer-surface crests (115), and the manifold slots (116) and the outer-surface crests (115) are arranged relative to each other so as to reduce the effective contact between the heater assembly (104) and the hot-runner manifold assembly (102)
  • the partial-contacting means (106) includes: an intermediate assembly (124) positioned, at least in part, between the heater assembly (104) and the hot-runner manifold assembly (102), the intermediate assembly (124) contacts, at least in part, the heater assembly (104) and the hot-runner manifold assembly (102), and the intermediate assembly (124) is arranged so as to reduce the effective contact between the heater assembly (104) and the hot-runner manifold assembly (102).
  • a component (140) is configured to reduce radiative heat transfer, from the heater assembly (104), to objects other than the hot-runner manifold assembly (102).
  • FIGS. 1 -15 depict examples of the mold-tool system (100). It will be appreciated that the examples depicted in FIGS. 1 -15 may be combined in any suitable permutation and combination. It will be appreciated that the assemblies and modules described above may be connected with each other as may be required to perform desired functions and tasks that are within the scope of persons of skill in the art to make such combinations and permutations without having to describe each and every one of them in explicit terms. There is no particular assembly, components, or software code that is superior to any of the equivalents available to the art. There is no particular mode of practicing the inventions and/or examples of the invention that is superior to others, so long as the functions may be performed. It is believed that all the crucial aspects of the invention have been provided in this document.

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

Abstract

Les inventeurs ont cherché à résoudre un problème qui est associé aux systèmes de moulage connus qui fabriquent par inadvertance des articles moulés ou des pièces moulées de mauvaise qualité. Après une importante étude, les inventeurs pensent qu'ils sont parvenus à appréhender le problème et sa solution, comme présenté ci-dessous, et les inventeurs pensent que cette compréhension n'est pas connue du public. La présente invention a trait à un système d'outil de moulage (100), lequel système comprend : un moyen de contact partiel (106) permettant de mettre partiellement en contact un bloc chauffant (104) avec un ensemble collecteur à canaux chauffés (102).
PCT/US2012/037867 2011-05-18 2012-05-15 Contact partiel entre un bloc chauffant et un ensemble collecteur à canaux chauffés WO2012158659A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201161487354P 2011-05-18 2011-05-18
US61/487,354 2011-05-18

Publications (1)

Publication Number Publication Date
WO2012158659A1 true WO2012158659A1 (fr) 2012-11-22

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160071045A (ko) * 2014-12-11 2016-06-21 주식회사 대영초음파 진동 융착기의 진동융착시 예열을 위한 열선 고정방법 및 그 장치

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2987300A (en) * 1959-05-29 1961-06-06 Edward G S Greene Heat transfer assembly
US3387653A (en) * 1967-01-26 1968-06-11 Wakefield Eng Inc Heat transfer apparatus
US5225662A (en) * 1992-01-13 1993-07-06 Husky Injection Molding Systems, Ltd. Flexible heating element for a hot runner housing including method of manufacture and method of installation
US20040011495A1 (en) * 2000-05-24 2004-01-22 Jonathon Fischers Mold material processing device, method and apparatus for producing same
US20040056385A1 (en) * 2002-09-19 2004-03-25 Husky Injection Molding Systems Ltd Cooling tube with porous insert

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2987300A (en) * 1959-05-29 1961-06-06 Edward G S Greene Heat transfer assembly
US3387653A (en) * 1967-01-26 1968-06-11 Wakefield Eng Inc Heat transfer apparatus
US5225662A (en) * 1992-01-13 1993-07-06 Husky Injection Molding Systems, Ltd. Flexible heating element for a hot runner housing including method of manufacture and method of installation
US20040011495A1 (en) * 2000-05-24 2004-01-22 Jonathon Fischers Mold material processing device, method and apparatus for producing same
US20040056385A1 (en) * 2002-09-19 2004-03-25 Husky Injection Molding Systems Ltd Cooling tube with porous insert

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160071045A (ko) * 2014-12-11 2016-06-21 주식회사 대영초음파 진동 융착기의 진동융착시 예열을 위한 열선 고정방법 및 그 장치
KR101669628B1 (ko) 2014-12-11 2016-10-27 주식회사 대영초음파 진동 융착기의 진동융착시 예열을 위한 열선 고정방법 및 그 장치

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