USRE34177E - Oven for blow molding machine - Google Patents
Oven for blow molding machine Download PDFInfo
- Publication number
- USRE34177E USRE34177E US07/727,833 US72783391A USRE34177E US RE34177 E USRE34177 E US RE34177E US 72783391 A US72783391 A US 72783391A US RE34177 E USRE34177 E US RE34177E
- Authority
- US
- United States
- Prior art keywords
- parison
- oven
- heating
- heating element
- elements
- 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
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Images
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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/0277—Apparatus with continuous transport of the material to be cured
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/64—Heating or cooling preforms, parisons or blown articles
- B29C49/68—Ovens specially adapted for heating preforms or parisons
-
- 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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C2035/0211—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould resistance heating
-
- 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
- B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
- B29C2037/90—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/64—Heating or cooling preforms, parisons or blown articles
- B29C49/6409—Thermal conditioning of preforms
- B29C49/6436—Thermal conditioning of preforms characterised by temperature differential
- B29C49/6462—Thermal conditioning of preforms characterised by temperature differential by masking
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/64—Heating or cooling preforms, parisons or blown articles
- B29C49/68—Ovens specially adapted for heating preforms or parisons
- B29C49/6835—Ovens specially adapted for heating preforms or parisons using reflectors
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/64—Heating or cooling preforms, parisons or blown articles
- B29C49/68—Ovens specially adapted for heating preforms or parisons
- B29C49/685—Rotating the preform in relation to heating means
Definitions
- the present invention relates to plastic preforms or parisons and relates, in particular, to heat treatment of parisons to condition the parisons for further treatment or further forming such as blow molding.
- a series of parisons are conveyed continuously which being rotated on a support mandrel through an oven containing a battery of heating elements.
- the heating elements impart heat to the body of the parison usually (but not necessarily) from top to bottom of a vertically disposed parison to condition plastic from which the parison is molded for subsequent treatment.
- the heating elements are fixed in position within the oven and are arranged relative to the path traversed by the parison and relative to the shape of the parison to create a desired temperature profile throughout the body of the parison.
- one heating element of a vertical array of elements is positioned a first distance from a first point or first region on the body of the parison while another heating element of the array is positioned a second distance from a second point on the body of the parison thereby creating a temperature profile and establishing a temperature gradient in the body of the parison.
- the temperature profile is adjusted by varying or changing the power to the heating elements. While this procedure is operative, it does not possess sufficient flexibility to meet with requirements of tapered conical or other unusual shaped parisons.
- the heating elements are fixed for a given run of parisons and while such elements are adjustable, to and fro, relative to the parison, it is necessary to dismantle the oven virtually to perform laborious and time consuming steps to set-up, initially, and make numerous adjustments to fine tune the heat requirements of a given run of parisons or to reset and readjust the heating elements for entirely different parison configurations.
- the present invention provides an apparatus and a process facilitating convenient, initial setting and subsequent adjustment of the position of individual heating elements in a battery of elements.
- a further feature of the invention is the provision of a battery of heating elements, for the purpose indicated above, where each element is provided with individual support means including adjustment means for moving individual elements selectively and in step by step fashion to a variety of positions relative to a selected portion, region or point on the body of a parison.
- heating elements per se, is not critical to the present invention and it is to be understood that the heating elements can take the form of electric filaments enclosed in glass tubes or similar structures, electrical filaments coated with metal or ceramic material, gas burners or other heat sources as the composition of the plastic, parison design and engineering considerations dictate.
- a still further feature of the invention is the provision of a reflector or shield means disposed about the heating elements positioned to focus heat toward the parison body.
- the reflectors also serve as a protective shield in the event a distorted or deformed parison carried by its conveyor rotates eccentrically thereby making damaging contact with one or more heating elements.
- the reflectors project an appreciable distance toward the parison beyond the exposed surface of the heating element thereby protecting the fragile elements from interference with whirling deformed parisons.
- An apparatus for heat treating a series of rotating parisons advancing through an oven carried by suitable conveyor means embracing principles of the present invention may comprise an oven means, means for conveying and rotating a series of plastic parisons through said oven means, support means carrying a battery of heating elements and movable means individual to each heating element extending to the exterior of oven means for positioning and adjusting the individual heating elements relative to said parisons, in incremental fashion to establish a temperature profile for heating the parisons.
- a process embracing certain other principles of the invention effective to create a heat screen or heat front having a desired temperature profile for heat treating a given plastic parison structure may comprise the steps of transporting a series of rotating parisons along a predetermined path, arranging a battery of heating elements within an enclosure for directing heat toward said parisons, adjusting individual heating elements incrementally relative to said parison from a point external of said enclosure so that heat projected by individual heaters is a function of the position of said individual heaters relative to said parisons thereby establishing a desired temperature profile vis-a-vis the body of each parison.
- FIG. 1 is a vertical section of a prior art apparatus having fixed heating elements
- FIG. 2 is an end view, partially in section, of a parison oven embracing principles of the present invention
- FIG. 3 is a view similar to FIG. 2, enlarged, showing details of the heating element supports and the incremental heating element adjustment means;
- FIG. 4 is a plan view of one end of a heating element support means
- FIG. 5 is a vertical section of a portion of FIG. 4 showing the cross-sectional configuration of a heating element reflector-shield.
- FIG. 1 shows an oven O enclosing fixed heating elements E operative to heat a parison P supported on a rotating mandrel M carried by conveyor C.
- the reference numeral 10 indicates, generally, a parison oven comprising an oven enclosure 11, including sidewalls 12 and 15. Mounted on oven sidewall 12 by means of a bracket 13 is a batttery of heating elements indicated, generally, at 14. A parison 16 (FIG. 2) supported by mandrel 17 is rotatably mounted on conveyor 18.”
- Individual heating elements 19 through 26 (FIG. 3), defining elongated tubes, as is next apparent in FIGS. 3 and 4, are supported at each end by movable support means 27.
- FIG. 4 While the left end of movable support means 27 is disclosed in FIG. 4, it is to be understood that the right end (not shown) is a mirror image of the left end.
- the movable support 27 includes a shaft extension 28, slidably received in bracket 13, projecting through oven sidewall 12 and terminating in an operating knob 29.
- Each heating element 19-26 is provided with a shaft 28. For convenience, only one shaft will be described with the understanding that each heating element is supported and adjusted individually in identical fashion.
- the shaft 28 is formed with a plurality of lands 31 with intervening grooves 32.
- the lands and grooves are part of an adjustment means which, in the disclosed embodiment, defines a detent mechanism.
- Cooperating with the lands and grooves is a spring pressed ball 33, shown in dashed lines in FIG. 3 and retained by nut 35 operative to snap into and out of grooves 32 as operating knob 29 is manipulated toward and away from parison 16.
- the heating elements are movable from the solid line position of heating element 19 in FIG. 3 to the dotted line position thereof by manipulation of the shaft 28 to move the heating element in incremental fashion toward the parison to develop a temperature profile indicated by the dashed line 34 of FIG. 3.
- the battery of heating elements 19-26 are coded by appropriate indicia so that coordinates of their respective positions relative to the parison may be preserved for future runs when it is desired to reproduce a given temperature profile.
- the letters A-H designate individual heating elements of a given battery and the letters a-h designate the axial position of a particular heating element. Therefore, one can readily record the position of a particular heating element for a given run by indicating that its position, for example, in FIG. 3 is D-h.
- the detent means or other heating element adjustment means can take a variety of configurations so long as the unit is positive and includes indicia for reproducible settings.
- the battery embracing the heating elements be disposed vertically as in FIGS. 2 and 3 or horizontally relative to the parison or in a skewed position, as desired.
- the sidewall 12, to which the battery support 13 is secured is movable in that the sidewall is hinged as at 36 by hinge pin 37 making it possible to swing the entire battery including its incrementally movable support shafts away from the parison train, to the left or counterclockwise as indicated by the arrow 38 in FIG. 3.
- reflector 41 which focuses the heat in the direction of the parison.
- reflector 41 serves as a shield protecting the heating elements which are usually quite fragile, from destructive contact with a whirling, deformed or lopsided parison progressing through the oven.
- the reflectors 41 project beyond the exposed surface of the heat elements a suitable distance identified by the dimension X in FIG. 5 to block damage to the heating elements.
- the reflectors 41 are each supported at opposite ends by mating tube supports 27.
- the right end of the reflectors are supported at mating tube supports as is the case with each heating element.
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/727,833 USRE34177E (en) | 1988-11-16 | 1991-07-09 | Oven for blow molding machine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/271,719 US4923395A (en) | 1988-11-16 | 1988-11-16 | Oven for blow molding machine |
US07/727,833 USRE34177E (en) | 1988-11-16 | 1991-07-09 | Oven for blow molding machine |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/271,719 Reissue US4923395A (en) | 1988-11-16 | 1988-11-16 | Oven for blow molding machine |
Publications (1)
Publication Number | Publication Date |
---|---|
USRE34177E true USRE34177E (en) | 1993-02-09 |
Family
ID=26955084
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/727,833 Expired - Lifetime USRE34177E (en) | 1988-11-16 | 1991-07-09 | Oven for blow molding machine |
Country Status (1)
Country | Link |
---|---|
US (1) | USRE34177E (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5549468A (en) * | 1994-10-19 | 1996-08-27 | Constar Plastics Inc. | Heating lamp assembly |
US5772951A (en) * | 1996-06-18 | 1998-06-30 | Husky Injection Molding Systems Ltd. | Molded article conditioning and storage system, method and resulting preform |
US5872174A (en) * | 1997-04-04 | 1999-02-16 | Ball Corporation | Plastic articles and processes |
US6358032B1 (en) * | 1999-11-09 | 2002-03-19 | Tetra Laval Holdings & Finance Sa | Machine for the production of plastic receptacles |
US6368099B1 (en) * | 1999-05-20 | 2002-04-09 | Husky Injection Molding Systems Ltd. | Oven-pallet alignment and profiled heating of preforms |
US20070042074A1 (en) * | 2005-08-19 | 2007-02-22 | Husky Injection Molding Systems Ltd. | Apparatus & molding system for rotating molded articles |
US20070085243A1 (en) * | 2003-12-19 | 2007-04-19 | Christophe Doudement | Preform heating module equipped with an aerodynamically profiled air baffle and oven comprising at least one such module |
US20080073333A1 (en) * | 2004-07-08 | 2008-03-27 | Christophe Doudement | Preform-Heating Furnace Comprising a Member for Controlling the Movement of a Heating Means Between Indexed Positions |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3166304A (en) * | 1961-05-26 | 1965-01-19 | Ind Ovens Inc | Heating means for strip material |
US3290026A (en) * | 1961-05-26 | 1966-12-06 | Ind Ovens Inc | Heating means for strip material |
US3472499A (en) * | 1966-02-07 | 1969-10-14 | Wolverine World Wide Inc | Method of using a singeing machine |
US3584846A (en) * | 1969-11-14 | 1971-06-15 | Lyle E Mccoy | Heating apparatus for elongate material |
US3917445A (en) * | 1973-05-25 | 1975-11-04 | Paris Grands Moulins | Baking oven for bread |
US3930790A (en) * | 1971-04-08 | 1976-01-06 | Ethyl Corporation | Method and apparatus for shrinking plastic film over grouped articles |
US3975618A (en) * | 1974-02-14 | 1976-08-17 | Heidenreich & Harbeck Zweingniederlassung Der Gildemeister Ag | Method and apparatus for heating synthetic plastic components |
US4690633A (en) * | 1984-09-07 | 1987-09-01 | Husky Injection Molding Systems Ltd. | Apparatus for preparing hollow plastic articles |
-
1991
- 1991-07-09 US US07/727,833 patent/USRE34177E/en not_active Expired - Lifetime
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3166304A (en) * | 1961-05-26 | 1965-01-19 | Ind Ovens Inc | Heating means for strip material |
US3290026A (en) * | 1961-05-26 | 1966-12-06 | Ind Ovens Inc | Heating means for strip material |
US3472499A (en) * | 1966-02-07 | 1969-10-14 | Wolverine World Wide Inc | Method of using a singeing machine |
US3584846A (en) * | 1969-11-14 | 1971-06-15 | Lyle E Mccoy | Heating apparatus for elongate material |
US3930790A (en) * | 1971-04-08 | 1976-01-06 | Ethyl Corporation | Method and apparatus for shrinking plastic film over grouped articles |
US3917445A (en) * | 1973-05-25 | 1975-11-04 | Paris Grands Moulins | Baking oven for bread |
US3975618A (en) * | 1974-02-14 | 1976-08-17 | Heidenreich & Harbeck Zweingniederlassung Der Gildemeister Ag | Method and apparatus for heating synthetic plastic components |
US4690633A (en) * | 1984-09-07 | 1987-09-01 | Husky Injection Molding Systems Ltd. | Apparatus for preparing hollow plastic articles |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5549468A (en) * | 1994-10-19 | 1996-08-27 | Constar Plastics Inc. | Heating lamp assembly |
US5688466A (en) * | 1994-10-19 | 1997-11-18 | Constar Plastics, Inc. | Alignment assembly for heating lamps of a blow molding apparatus and method of use |
US5772951A (en) * | 1996-06-18 | 1998-06-30 | Husky Injection Molding Systems Ltd. | Molded article conditioning and storage system, method and resulting preform |
US5872174A (en) * | 1997-04-04 | 1999-02-16 | Ball Corporation | Plastic articles and processes |
US6368099B1 (en) * | 1999-05-20 | 2002-04-09 | Husky Injection Molding Systems Ltd. | Oven-pallet alignment and profiled heating of preforms |
US6358032B1 (en) * | 1999-11-09 | 2002-03-19 | Tetra Laval Holdings & Finance Sa | Machine for the production of plastic receptacles |
US20070085243A1 (en) * | 2003-12-19 | 2007-04-19 | Christophe Doudement | Preform heating module equipped with an aerodynamically profiled air baffle and oven comprising at least one such module |
US7448866B2 (en) * | 2003-12-19 | 2008-11-11 | Sidel Participations | Preform heating module equipped with aerodynamically profiled air baffle |
US20080073333A1 (en) * | 2004-07-08 | 2008-03-27 | Christophe Doudement | Preform-Heating Furnace Comprising a Member for Controlling the Movement of a Heating Means Between Indexed Positions |
US7649158B2 (en) * | 2004-07-08 | 2010-01-19 | Sidel Participations | Preform-heating furnace comprising a member for controlling the movement of a heating means between indexed positions |
US20070042074A1 (en) * | 2005-08-19 | 2007-02-22 | Husky Injection Molding Systems Ltd. | Apparatus & molding system for rotating molded articles |
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Legal Events
Date | Code | Title | Description |
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FEPP | Fee payment procedure |
Free format text: PAT HLDR NO LONGER CLAIMS SMALL ENT STAT AS INDIV INVENTOR (ORIGINAL EVENT CODE: LSM1); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
FPAY | Fee payment |
Year of fee payment: 4 |
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FPAY | Fee payment |
Year of fee payment: 8 |
|
FPAY | Fee payment |
Year of fee payment: 12 |
|
AS | Assignment |
Owner name: ROYAL BANK OF CANADA,CANADA Free format text: SECURITY AGREEMENT;ASSIGNOR:HUSKY INJECTION MOLDING SYSTEMS LTD.;REEL/FRAME:020431/0495 Effective date: 20071213 Owner name: ROYAL BANK OF CANADA, CANADA Free format text: SECURITY AGREEMENT;ASSIGNOR:HUSKY INJECTION MOLDING SYSTEMS LTD.;REEL/FRAME:020431/0495 Effective date: 20071213 |
|
AS | Assignment |
Owner name: HUSKY INJECTION MOLDING SYSTEMS LTD., CANADA Free format text: RELEASE OF SECURITY AGREEMENT;ASSIGNOR:ROYAL BANK OF CANADA;REEL/FRAME:026647/0595 Effective date: 20110630 |