US3364524A - Cooling plug for continuously extruded hot tubular plastic material - Google Patents

Cooling plug for continuously extruded hot tubular plastic material Download PDF

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Publication number
US3364524A
US3364524A US482497A US48249765A US3364524A US 3364524 A US3364524 A US 3364524A US 482497 A US482497 A US 482497A US 48249765 A US48249765 A US 48249765A US 3364524 A US3364524 A US 3364524A
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US
United States
Prior art keywords
chamber
cooling plug
cooling
end wall
jacket
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.)
Expired - Lifetime
Application number
US482497A
Other languages
English (en)
Inventor
Pong R Hsia
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.)
Continental Can Co Inc
Original Assignee
Continental Can Co 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 Continental Can Co Inc filed Critical Continental Can Co Inc
Priority to US482497A priority Critical patent/US3364524A/en
Priority to SE11071/66A priority patent/SE317495B/xx
Priority to DE19661629330 priority patent/DE1629330A1/de
Priority to GB37904/66A priority patent/GB1152998A/en
Application granted granted Critical
Publication of US3364524A publication Critical patent/US3364524A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/901—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies
    • B29C48/902—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies internally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils

Definitions

  • An object of this invention is to provide a novel cooling plug including a jacket defining a cooling chamber closed at first and second end portions thereof by respective first and second end walls, means for introducing coolant into the chamber, means for exhausting coolant from the chamber, and means passing completely through the jacket for conducting fluid media, such as condensible gases or water vapor, from a side of the jacket which is adapted to be connected to an extrusion machine to an opposite side of the jacket exposed to atmosphere thereby preventing the interruption of a continuous extrusion operation which might otherwise occur in the absence of the removal of the fluid media.
  • fluid media such as condensible gases or water vapor
  • a further object of this invention is to provide a novel cooling plug comprising first and second chambers, the first and second chambers being closed at opposite ends thereof by respective first and second end walls, a partition separating the first and second chambers, means passing through the first end Wall for introducing coolant into the first chamber, means passing through the second end wall for introducing a fluid media from the exterior of the second chamber to the interior thereof, means for directing the fluid media from the second chamber to the exterior of the jacket adjacent the first end wall, and means for coupling the cooling plug to an extrusion machine.
  • Still another object of this invention is to provide a novel cooling plug of the type immediately above described in which the coupling means includes passage means for directing the fluid media from a source of fluid media to an area adjacent the second end wall of the second chamber.
  • a further object of this invention is to provide a novel cooling plug including a jacket, the jacket including a cooling chamber closed at first and second end portions thereof by respective first and second end walls, a first conduit passing longitudinally through the cooling chamher and opening outwardly thereof through the first and second end walls whereby a fluid media externally of the jacket adjacent the second end wall is bypassed to the exterior of the jacket adjacent the first end wall, a second conduit passing through the first end wall into the interior of the cooling chamber for introducing cool ant therein, means in the first end wall for exhausting circulated coolant from the cooling chamber, a second chamber adjacent the cooling chamber, the second chamber being separated from the cooling chamber by the r the cooling chamber 12.
  • the coolant is second end wall, the second conduit opening into the interior of the second chamber, a wall portion of the second chamber being provided with aperture means for placing the interior of the second chamber in fluid communication with the exterior thereof, and the first and second conduits being in telescopic relationship.
  • Another object of this invention is to provide a novel cooling plug of the type described wherein the jacket includes an external surface, and the external surface of the jacket is provided with a coating of polytetrafluoroethylene.
  • FIGURE 1 is a bottom perspective view of a cooling plug constructed in accordance with this invention, and illustrates a pair of conduits connected to a jacket of the cooling plug and coupling means for securing the cooling plug to an extrusion machine.
  • FIGURE 2 is an enlarged fragmentary sectional view taken generally along line 2-2 of FIGURE 1, and illustrates the cooling plug attached to an extrusion machine and a tube of hot plastic material being cooled by the cooling plug.
  • a novel cooling plug constructed in accordance with this invention is generally referred to by the reference numeral 19 and comprises a jacket 11 which is of a substantially cylindrical configuration.
  • the jacket 11 includes a substantially annular cooling chamber 12 (FIGURE 2) defined by an iner body wall 13 and an outer body wall 14.
  • Each of the walls l3, i4 is generally cylindrical in shape and is enclosed at upper end portions (unnumbered) by a generally circular end wall 15.
  • the inner wall 13 is received in a downwardly opening annular groove 16 of the end wall 15.
  • the walls 13 and 15 are preferably welded or otherwise conventionally secured to each other to maintain the walls 13, 15 in fixed relationship.
  • the end wall 15 is similarly welded (not shown) to the outer wall 14 of the jacket 11.
  • a bottom end portion (unnumbered) of the jacket 11 is provided with a pair of axially spaced generally circular end walls till, 21.
  • the end wall 243 is welded or otherwise secured to the cylindrical wall 13 while the end wall 21 is similarly welded to the cylindrical wall 14.
  • the walls 15, 2d are provided with respective circular openings 22, 23, and a bushing or sleeve 24 is fixed to the end wall 15 in the opening 22.
  • a pipe or conduit 25 is positioned in the bushing 24 and the opening 23, and a bottom edge 26 of the pipe 25 seats upon the wall 21 of the jacket 11.
  • the pipe or conduit 25 is fixed to the bushing 24, the wall Zll and the wall 21 by welding.
  • An elbow 27 connects the conduit 25 to a conduit 30 which is in turn connected to a conventional source of liquid coolant, such as water.
  • a lower end portion of the pipe 25 is provided with a plurality of identical radially directed circumferentially spaced openings or ports 31 positioned substantially midway between the walls 20, 21.
  • Coolant from the coolant source (not shown) is introduced through the conduit 3a, the elbow 27, the pipe 25 and the plurality of openings 31 into the lower portion of exhausted from the chamber 12 by means of a plurality of circumferentially spaced apertures or openings 32 formed in the end wall 15 of the jacket ll.
  • Suitable conduits can be connected to each of the openings 32 for returning the coolant to a conventional reservoir (also not shown), or a manifold (not shown) having a single return conduit can be secured in spaced overlying relationship to the 3 end wall for accumulating the exhausted coolant and returning the same to the coolant reservoir.
  • the jacket 11 of the cooling plug It] includes a second chamber defined by the end wall 21, a cylindrical body wall 36 and a generally circular end wall 37 pr vided with a plurality of circumferentially spaced openings or apertures 38.
  • a conduit or pipe 40 is arranged in coaxial internally telescopic relationship to the conduit 25.
  • the conduit 40 has a bottom end portion 41 opening into the interior of the second chamber 35.
  • the bottom end portion 41 of the conduit 40 is fixed in an opening (unnumbered) of the end wall 21.
  • An upper end portion 42 of the conduit 40 passes through an opening 43 in the elbow 27.
  • a valve V of a conventional construction is located in the conduit 42 remote from the cooling plug 10.
  • the purpose of the second chamber 35, the conduit 40 and the valve V is to bypass fluid media, such as condensible gases or water vapor, from an exterior area adjacent the bottom of the cooling plug lit to an area above and remote from an upper portion of the cooling plug, as will appear more fully hereafter.
  • fluid media such as condensible gases or water vapor
  • Coupling means45 are provided for coupling the cooling plug 10 to an extrusion nozzle 46 of a conventional extrusion machine or extruder (not shown).
  • the coupling means 45 comprises a generally cylindrical collar 47 having a radially outwardly directed flange 48.
  • a plurality of screws 49 passed through openings (unnumbered) in the flange 48 secure the collar 47 to the end wall 37 of the jacket 11.
  • a connector 59 is partially positioned in and secured to the collar 47 by means of a plurality of set screws 51 bottoming in a circumferential groove 52 of the connector as is readily apparent from FIGURE 2 of the drawing.
  • a reduced threaded end portion 53 of the connector 50 is threadably secured to an internally threaded socket 54 of the extrusion nozzle 46.
  • the connector 50 also includes an axial passage or port 55 in aligned relationship with a passage or port 56 of the extrusion nozzle 46.
  • the passage 55 is connected to a plurality of radially outwardly directed passages or ports 57 opening outwardly through a surface (unnumbered) of the connector 50.
  • a tube T of hot solid or foam plastic material such as polyethylene or polystyrene, is extruded outwardly from an extrusion orifice O of the extrusion nozzle 46.
  • the tube T is drawn upwardly by conventional draw or pull rolls (not shown) during which time an inner surface S externally surrounds and contacts an outer surface (unnumbered) of the cylindrical wall 14-.
  • Heat is transferred from the tube T to and through the cylindrical wall 14 and to the coolant in the chamber 12 of the cooling plug 10, thus cooling or chilling the tube T.
  • the coolant is continually introduced into and exhausted from the chamber 12 in the manner heretofore described.
  • a conventional cutter C longitudinally severs or slices the tube in the manner clearly illustrated in FIGURE 2 of the draw ing.
  • the severed tube is thereafter progressively opened and formed into a generally flat web which is wound into a roll by a suitable mechanism (not shown).
  • an inert gas, or a similar gaseous media is introduced into a volume VI of the tube T through the passage 56 of the extrusion nozzle 46 and the passages 55, 57 of the connector 50.
  • the moisture in the air introduced in the volume V1 tends to condense and form water vapor due to the differential temperature between the hot tube T and the relatively cooler plug 10.
  • the cooling plug 10 which effectively bypasses a gaseous media from the volume V].
  • valve V is regulated to control the rate of flow of the gaseous media from the volume V1 to atmosphere. This bypassing of the gaseous media prevents objectionable accumulation of a condensible gas or water vapor in the volume V1 and insures continuous and uninterrupted extrusion of the tube T.
  • the wall 14 is preferably provided with a coating of polytetrafluoroethylene.
  • the portion of the conduit 46 ⁇ upstream from the valve V can be connected to a conventional source of vacuum (not shown) to increase the flow rate of the gaseous media from the volume V1.
  • a cooling plug in combination with an extrusion nozzle wherein the extrusion nozzle includes an extrusion orifice for continuously extruding hot tubular plastic material in an upward direction in external telescopic relationship to said cooling plug, said cooling plug including respective upper and lower chambers, said upper and lower chambers being closed at opposite ends thereof by respective first and second end walls, a partition between and separating said upper and lower chambers, means passing through said first end wall for introducing coolant into said upper chamber, means for removing coolant from said upper chamber, means for introducing a fluid media to an area between said lower chamber and said tube, means passing through said second end wall 'for introducing the fluid media from the exterior of said lower chamber into the interior thereof, means for directing the fluid media from said lower chamber to the exterior thereof through said partition and said first end wall, and means for regulating the flow of said fluid media from said area cxteriorly of said cooling plug.
  • said upper chamber is defined by inner and outer generally cylindrical walls in spaced telescopic relationship, said first end wall closes said upper chamber at an upper end thereof, and an end wall generally parallel to and spaced from said partition closes the inner of said cylindrical walls thereby imparting a generally U-shaped configuration to said upper chamber as viewed in axial section.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
US482497A 1965-08-25 1965-08-25 Cooling plug for continuously extruded hot tubular plastic material Expired - Lifetime US3364524A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US482497A US3364524A (en) 1965-08-25 1965-08-25 Cooling plug for continuously extruded hot tubular plastic material
SE11071/66A SE317495B (xx) 1965-08-25 1966-08-16
DE19661629330 DE1629330A1 (de) 1965-08-25 1966-08-23 Kuehlpatrone
GB37904/66A GB1152998A (en) 1965-08-25 1966-08-24 Improvements in or relating to Cooling Plugs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US482497A US3364524A (en) 1965-08-25 1965-08-25 Cooling plug for continuously extruded hot tubular plastic material

Publications (1)

Publication Number Publication Date
US3364524A true US3364524A (en) 1968-01-23

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ID=23916318

Family Applications (1)

Application Number Title Priority Date Filing Date
US482497A Expired - Lifetime US3364524A (en) 1965-08-25 1965-08-25 Cooling plug for continuously extruded hot tubular plastic material

Country Status (4)

Country Link
US (1) US3364524A (xx)
DE (1) DE1629330A1 (xx)
GB (1) GB1152998A (xx)
SE (1) SE317495B (xx)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3476846A (en) * 1967-07-17 1969-11-04 Du Pont Process and apparatus for extruding polyolefins
US3724976A (en) * 1970-12-01 1973-04-03 Sinclair Koppers Co Fluid distributor for use in extruding foamed polymeric materials
US4009976A (en) * 1973-09-04 1977-03-01 Mobil Oil Corporation Apparatus for producing a foamed polystyrene sheet having a density gradient decreasing from the external surfaces inwardly
EP0231657A2 (en) * 1985-12-24 1987-08-12 Xerox Corporation Process and apparatus for the fabrication of thin-walled tubes
US5053174A (en) * 1987-10-12 1991-10-01 Muolon Oy Method of producing a shrinkable product
US20090102084A1 (en) * 2007-10-22 2009-04-23 Lupke Manfred A A Pipe extruding system with cooling plug separation

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US864428A (en) * 1906-10-02 1907-08-27 Albert O Mitchell Milk-regenerator.
US2177207A (en) * 1937-11-18 1939-10-24 Nero Martial Del Beer cooler
US2403476A (en) * 1944-08-08 1946-07-09 Du Pont Extrusion apparatus
US2987765A (en) * 1960-07-07 1961-06-13 Du Pont Process and apparatus for forming tubes
US3061875A (en) * 1955-10-17 1962-11-06 Milo R Gerow Wind-up method and apparatus
GB929662A (en) * 1958-09-04 1963-06-26 Paul Kleinewefers A calender roller
CA673305A (en) * 1963-10-29 T. Hathaway Charles Extruder with mandrel
US3142865A (en) * 1961-10-26 1964-08-04 Owens Illinois Glass Co Method and apparatus for producing thermoplastic tubing and sheeting
US3160918A (en) * 1961-11-15 1964-12-15 berggren etal
US3221084A (en) * 1959-05-26 1965-11-30 Du Pont Manufacture of polyethylene film
US3265124A (en) * 1964-07-10 1966-08-09 Falls Ind Inc Coated graphite products

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA673305A (en) * 1963-10-29 T. Hathaway Charles Extruder with mandrel
US864428A (en) * 1906-10-02 1907-08-27 Albert O Mitchell Milk-regenerator.
US2177207A (en) * 1937-11-18 1939-10-24 Nero Martial Del Beer cooler
US2403476A (en) * 1944-08-08 1946-07-09 Du Pont Extrusion apparatus
US3061875A (en) * 1955-10-17 1962-11-06 Milo R Gerow Wind-up method and apparatus
GB929662A (en) * 1958-09-04 1963-06-26 Paul Kleinewefers A calender roller
US3221084A (en) * 1959-05-26 1965-11-30 Du Pont Manufacture of polyethylene film
US2987765A (en) * 1960-07-07 1961-06-13 Du Pont Process and apparatus for forming tubes
US3142865A (en) * 1961-10-26 1964-08-04 Owens Illinois Glass Co Method and apparatus for producing thermoplastic tubing and sheeting
US3160918A (en) * 1961-11-15 1964-12-15 berggren etal
US3265124A (en) * 1964-07-10 1966-08-09 Falls Ind Inc Coated graphite products

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3476846A (en) * 1967-07-17 1969-11-04 Du Pont Process and apparatus for extruding polyolefins
US3724976A (en) * 1970-12-01 1973-04-03 Sinclair Koppers Co Fluid distributor for use in extruding foamed polymeric materials
US4009976A (en) * 1973-09-04 1977-03-01 Mobil Oil Corporation Apparatus for producing a foamed polystyrene sheet having a density gradient decreasing from the external surfaces inwardly
EP0231657A2 (en) * 1985-12-24 1987-08-12 Xerox Corporation Process and apparatus for the fabrication of thin-walled tubes
EP0231657A3 (en) * 1985-12-24 1989-02-01 Xerox Corporation Process and apparatus for extruding tubular films process and apparatus for extruding tubular films
US5053174A (en) * 1987-10-12 1991-10-01 Muolon Oy Method of producing a shrinkable product
US20090102084A1 (en) * 2007-10-22 2009-04-23 Lupke Manfred A A Pipe extruding system with cooling plug separation
WO2009052606A1 (en) * 2007-10-22 2009-04-30 Lupke Manfred Arno Alfred Pipe extruding system with cooling plug separation
US7798796B2 (en) 2007-10-22 2010-09-21 Lupke Manfred A A Pipe extruding system with cooling plug separation
RU2475358C2 (ru) * 2007-10-22 2013-02-20 Манфред А.А. ЛУПКЕ Установка для экструзии труб с отделяемой охлаждающей заглушкой

Also Published As

Publication number Publication date
GB1152998A (en) 1969-05-21
DE1629330A1 (de) 1971-01-14
SE317495B (xx) 1969-11-17

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