US20040083609A1 - Two-piece molded fan - Google Patents

Two-piece molded fan Download PDF

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Publication number
US20040083609A1
US20040083609A1 US10/287,209 US28720902A US2004083609A1 US 20040083609 A1 US20040083609 A1 US 20040083609A1 US 28720902 A US28720902 A US 28720902A US 2004083609 A1 US2004083609 A1 US 2004083609A1
Authority
US
United States
Prior art keywords
bolts
hub
relative positioning
overlapping
positioning plane
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
US10/287,209
Other languages
English (en)
Inventor
Theodore Malott
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BorgWarner Inc
Original Assignee
BorgWarner Inc
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 BorgWarner Inc filed Critical BorgWarner Inc
Priority to US10/287,209 priority Critical patent/US20040083609A1/en
Assigned to BORGWARNER INC. reassignment BORGWARNER INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MALOTT, THEODORE A.
Priority to JP2003345599A priority patent/JP2004156591A/ja
Priority to EP03256648A priority patent/EP1416164A3/en
Publication of US20040083609A1 publication Critical patent/US20040083609A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/02—Selection of particular materials
    • F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/20—Manufacture essentially without removing material
    • F05D2230/21—Manufacture essentially without removing material by casting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/50—Building or constructing in particular ways
    • F05D2230/51—Building or constructing in particular ways in a modular way, e.g. using several identical or complementary parts or features
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49316—Impeller making
    • Y10T29/49327—Axial blower or fan

Definitions

  • the invention relates generally to fan drive systems and more specifically, fan drive systems with two-piece molded fans.
  • Cooling systems are used on vehicles today to provide cooling to an engine during operation.
  • a typical cooling system comprises a water pump and a fan drive.
  • Fan drives are typically driven by the engine crankshaft at a fixed ratio to cool engine coolant as it flows through a radiator. More specifically, a fan that is rigidly mounted to the fan drive generates the airflow as a function of engine crankshaft rotational speed for cooling the radiator.
  • all part surfaces may be divided up so that some can be molded by one die, and the rest by the other die, and the pair of die (or molds) can be pushed together and pulled apart freely along the same central axis. This represents the absolute minimum in terms of molds used (two) to produce the parts, and the number of pieces (one) in the part produced.
  • the number of fan blade configurations that can be made using a one-piece mold is thus limited to configurations that can be pulled apart freely along the same central axis.
  • overlapping blade fans cannot currently be made using the axial draw technique because the blade overlap would prevent part removal if the whole fan was cast as one piece.
  • a two-piece fan integrated with the fan drive is produced having overlapping fan blades using an axial draw technique.
  • the two halves are then removed from the mold and bolted together to form the two-piece fan.
  • a fan blade By molding the fan as two pieces, a fan blade can be produced that wraps around the outside of the housing and overlaps with each other.
  • the molding can be done within one die casting tool having a front and rear section or can be done with two separate die casting tools.
  • FIG. 1 is a perspective view of a two-piece fan assembly according to one preferred embodiment of the present invention.
  • FIG. 2 is an exploded view of the two-piece fan assembly
  • FIG. 3 is a front view of FIG. 1;
  • FIG. 4 is a side view of FIG. 1 indicating mold release directions.
  • FIGS. 1 - 4 indicates a two-piece fan assembly 10 according to a preferred embodiment of the present invention.
  • the two-piece fan assembly 10 is generally defined about a central axis A, and also spins about the same axis in operation.
  • the two-piece fan assembly 10 is preferably formed of die cast aluminum or molded plastic, although other materials may be used as those of skill in the art recognize.
  • the structural foundation of the fan assembly 10 is the central hub 12 , which is basically an annular disk that extends radially outward from a center bore 14 .
  • the center bore 14 is the attachment point of a motor shaft (not shown) that spins the fan assembly 10 about central axis A.
  • the motor shaft, and associated housing have a conventional arrangement well known to those of skill in the art and will not be discussed further in this application.
  • each fan blade 16 Disposed about the central hub 12 are a plurality of circumferentially displaced, radially disposed fan blades 16 having a radially inner portion 32 of their bases integrally molded with, and supported by, the central hub 12 . Also note that each fan blade 16 has a part of the front side portion 34 blocked by the next adjacent front side portion 34 when a person views the fan blade 16 from the side as in FIG. 3 (i.e. there is at least a partial overlap of the blades 16 as viewed from the front or back). This overlapping blade 16 structure, as one of skill in the art appreciates, enables the fan assembly 10 to provide increased air flow as compared with fan assemblies having non-overlapping blade structures.
  • the fan assembly 10 consists of a front portion 20 (left half of FIG. 4) and a rear portion 22 (right half of FIG. 4) fastened together through a coupling device known to those of skill in the art. Both the front portion 20 and rear portion 52 have a substantially flat region 50 a , 50 b that is defined by and corresponding to the relative positioning plane 52 .
  • the central hub 12 consists of a front hub portion 12 a and a rear hub portion 12 b .
  • the fan blades 16 consist of a front fan blade portion 16 a and a rear fan blade portion 16 b . As best seen in FIG.
  • each front fan blade portion 16 a is coupled to a rear fan blade portion 16 b such that they form a relatively smooth coupling along and between each radially outward portion 30 , radially inward portion 32 , front side portion 34 and rear side portion 36 when the front portion 20 is coupled to the rear portion 22 .
  • the front portion 20 and rear portion 22 are formed with a plurality of bolt holes 25 a , 25 b .
  • the boltholes 25 a , 25 b could also be formed in a post-casting step using a drill or similar equipment.
  • the flat portions 50 a , 50 b are first aligned along either side of the relative positioning plane 52 .
  • a bolt 24 is then inserted through a corresponding bolthole 25 a and 25 b to secure the front portion 20 to the rear portion 22 .
  • the bolt 24 may be secured within the respective pair of boltholes 25 a , 25 b by a corresponding nut (not shown) or other methods well known in the art. While the embodiments shown in FIGS.
  • 1 - 4 indicate 12 bolts 24 and 12 corresponding bolt holes 25 a , 25 b circumferentially placed around the hub portions 12 a , 12 b , the number and location of the bolts 24 and bolt holes 25 a , 25 b may vary as one of skill in the art would appreciate. Further, while the bolts 24 are shown with their head portions 24 a , closely coupled with the front portion 20 , one of skill would recognize that it is equally plausible that the bolt 24 is secured with the head portion 24 a closely coupled with the rear portion 22 to secure the front portion 20 to the rear portion 22 .
  • the fan assembly 10 is formed by die casting the front portion 20 and rear portion 22 as two separate pieces within a corresponding die casting tool separated along a relative positioning plane 52 .
  • the die cast tool separates, as indicated by the arrows, along the axis A away from the relative positioning plane 52 , thereby allowing the two portions 20 , 22 to be removed from the tooling.
  • the overlapping structure of the fan blades 16 would prevent part removal if the fan assembly 10 were cast as a single part using an axial draw technique.
  • the front section of the die cast tool separates from the front portion 20 along the axis A away from the relative positioning plane 52 such that the front section of the tool does not contact the front section of the overlapping blades 16 a .
  • the rear section of the die cast tool separates from the rear portion 22 along axis A away from the relative positioning plane 52 such that the rear section does not contact the rear section of the overlapping blades 16 b.
  • front portion 20 and rear portion 22 could be formed within two separate die casting tools using the axial draw technique.
  • the present invention presents a simple, easy and efficient procedure for casting a fan assembly 10 having an overlapping fan blade 16 structure using an axial draw technique.
  • the technique presented in the present invention can be applied to a potentially infinite variety of overlapping fan blade designs. All that is required to incorporate this technique is to determine a relative positioning plane 52 within the fan assembly 10 cutting through the fan blades 16 and hub 12 such that the die cast tool can be pulled apart along the axis A of the fan assembly 10 after the portions 20 , 22 are die cast.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
US10/287,209 2002-11-04 2002-11-04 Two-piece molded fan Abandoned US20040083609A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US10/287,209 US20040083609A1 (en) 2002-11-04 2002-11-04 Two-piece molded fan
JP2003345599A JP2004156591A (ja) 2002-11-04 2003-10-03 ２部分から成る成形ファン
EP03256648A EP1416164A3 (en) 2002-11-04 2003-10-22 Two-piece molded fan

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10/287,209 US20040083609A1 (en) 2002-11-04 2002-11-04 Two-piece molded fan

Publications (1)

Publication Number Publication Date
US20040083609A1 true US20040083609A1 (en) 2004-05-06

Family

ID=32093600

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/287,209 Abandoned US20040083609A1 (en) 2002-11-04 2002-11-04 Two-piece molded fan

Country Status (3)

Country Link
US (1) US20040083609A1 (ja)
EP (1) EP1416164A3 (ja)
JP (1) JP2004156591A (ja)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080150321A1 (en) * 2006-11-01 2008-06-26 Colin Neale Vehicle having aerodynamic fan elements
US20090302639A1 (en) * 2006-11-01 2009-12-10 Colin Neale Vehicle having aerodynamic fan elements
US8752850B2 (en) 2011-03-14 2014-06-17 Yorozu Corporation Arm component for vehicles and its manufacturing method
US20150204342A1 (en) * 2014-01-17 2015-07-23 Sunon Electronics(Foshan) Co., Ltd. Impeller and mold for manufacturing impeller
US9518586B2 (en) 2012-08-24 2016-12-13 Sanyo Denki Co., Ltd. Inline axial flow fan
US9714664B2 (en) 2011-10-17 2017-07-25 Honda Motor Co., Ltd. Method for manufacturing impeller
US20170306761A1 (en) * 2014-11-25 2017-10-26 Mitsubishi Heavy Industries, Ltd. Impeller and rotary machine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9102048B2 (en) 2013-11-29 2015-08-11 Black & Decker Inc. Sander having two-piece fan

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1017820A (en) * 1911-07-24 1912-02-20 Henry M Svebilius Propeller.
US3506061A (en) * 1965-06-10 1970-04-14 Gen Electric Apparatus for vacuum-casting a plurality of metal parts in a single mold
US3791762A (en) * 1970-05-29 1974-02-12 Zeise Theodore Ship{40 s propeller
US4224276A (en) * 1977-07-21 1980-09-23 Industrie Pirelli S.P.A. Process for manufacturing closed hollow bodies in elastomeric material
US4248288A (en) * 1979-08-20 1981-02-03 Anatol Michelson Fusion process for forming shell cores
US4694883A (en) * 1982-01-07 1987-09-22 Klockner-Humboldt-Deutz Ag Hollow core molding apparatus
US5352089A (en) * 1992-02-19 1994-10-04 Nippondenso Co., Ltd. Multi-blades fan device
US5558803A (en) * 1991-08-29 1996-09-24 Nippon Shokubai Co., Ltd. Electrorheological fluid with improved properties comprising composite polymer
US5588803A (en) * 1995-12-01 1996-12-31 General Motors Corporation Centrifugal impeller with simplified manufacture
US6224335B1 (en) * 1999-08-27 2001-05-01 Delphi Technologies, Inc. Automotive air conditioning fan assembly
US6318964B1 (en) * 2000-09-08 2001-11-20 Sheng Shyan Yang Complex cooling fan with increased cooling capacity
US20020064460A1 (en) * 2000-11-29 2002-05-30 Industrial Technology Research Institute Integrated 3-D blade structure
US20030063975A1 (en) * 2001-09-28 2003-04-03 Sunonwealth Electric Machine Industry Co., Ltd. Impeller structure
US20030185682A1 (en) * 2002-03-28 2003-10-02 Tsung-Yu Lei Composite heat-dissipating device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2366251A (en) * 1940-12-17 1945-01-02 Fullemann Johann Blower impeller
US3285187A (en) * 1965-11-05 1966-11-15 Msl Ind Inc Impeller for use in centrifugal pump or blower and a method of manufacture thereof
US3893817A (en) * 1973-01-02 1975-07-08 Outboard Marine Corp Die castable centrifugal fan

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1017820A (en) * 1911-07-24 1912-02-20 Henry M Svebilius Propeller.
US3506061A (en) * 1965-06-10 1970-04-14 Gen Electric Apparatus for vacuum-casting a plurality of metal parts in a single mold
US3791762A (en) * 1970-05-29 1974-02-12 Zeise Theodore Ship{40 s propeller
US4224276A (en) * 1977-07-21 1980-09-23 Industrie Pirelli S.P.A. Process for manufacturing closed hollow bodies in elastomeric material
US4248288A (en) * 1979-08-20 1981-02-03 Anatol Michelson Fusion process for forming shell cores
US4694883A (en) * 1982-01-07 1987-09-22 Klockner-Humboldt-Deutz Ag Hollow core molding apparatus
US5558803A (en) * 1991-08-29 1996-09-24 Nippon Shokubai Co., Ltd. Electrorheological fluid with improved properties comprising composite polymer
US5352089A (en) * 1992-02-19 1994-10-04 Nippondenso Co., Ltd. Multi-blades fan device
US5588803A (en) * 1995-12-01 1996-12-31 General Motors Corporation Centrifugal impeller with simplified manufacture
US6224335B1 (en) * 1999-08-27 2001-05-01 Delphi Technologies, Inc. Automotive air conditioning fan assembly
US6318964B1 (en) * 2000-09-08 2001-11-20 Sheng Shyan Yang Complex cooling fan with increased cooling capacity
US20020064460A1 (en) * 2000-11-29 2002-05-30 Industrial Technology Research Institute Integrated 3-D blade structure
US20030063975A1 (en) * 2001-09-28 2003-04-03 Sunonwealth Electric Machine Industry Co., Ltd. Impeller structure
US20030185682A1 (en) * 2002-03-28 2003-10-02 Tsung-Yu Lei Composite heat-dissipating device

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080150321A1 (en) * 2006-11-01 2008-06-26 Colin Neale Vehicle having aerodynamic fan elements
US20090302639A1 (en) * 2006-11-01 2009-12-10 Colin Neale Vehicle having aerodynamic fan elements
US7695050B2 (en) 2006-11-01 2010-04-13 Colin Neale Vehicle having aerodynamic fan elements
US8752850B2 (en) 2011-03-14 2014-06-17 Yorozu Corporation Arm component for vehicles and its manufacturing method
US9714664B2 (en) 2011-10-17 2017-07-25 Honda Motor Co., Ltd. Method for manufacturing impeller
US9518586B2 (en) 2012-08-24 2016-12-13 Sanyo Denki Co., Ltd. Inline axial flow fan
US20150204342A1 (en) * 2014-01-17 2015-07-23 Sunon Electronics(Foshan) Co., Ltd. Impeller and mold for manufacturing impeller
US10047762B2 (en) * 2014-01-17 2018-08-14 Sunon Electronics (Foshan) Co., Ltd. Impeller and mold for manufacturing impeller
US20170306761A1 (en) * 2014-11-25 2017-10-26 Mitsubishi Heavy Industries, Ltd. Impeller and rotary machine
US10655470B2 (en) * 2014-11-25 2020-05-19 Mitsubishi Heavy Industries, Ltd. Impeller and rotary machine

Also Published As

Publication number Publication date
EP1416164A2 (en) 2004-05-06
EP1416164A3 (en) 2005-04-06
JP2004156591A (ja) 2004-06-03

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Legal Events

Date Code Title Description
AS Assignment

Owner name: BORGWARNER INC., MICHIGAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MALOTT, THEODORE A.;REEL/FRAME:013476/0126

Effective date: 20021104

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION