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公开(公告)号：US20190275721A1
公开(公告)日：2019-09-12
申请号：US16421662
申请日：2019-05-24
Applicant: Addex, Inc.
Inventor： Robert E. Cree , William J. Randolph
Abstract: The present invention relates to an external cooling system for a molten film tube produced by a blown film tubular extrusion process, comprised of one or more enclosures with one or more respective cavities that directly receive a portion of cooling gas emanating from one or more associated cooling elements. Each enclosure includes a port containing a variable exhaust device and optional flow buffer, acting to maintain a pressure differential between the cavity and an adjacent inside volume of the molten film tube, adjustable to optimize molten film tube stability cooling element efficiency and spaced apart dimension between cooling elements. Significant increases in production speeds are achieved with improved film quality over an increased range of tubular film sizes, down to a minimum size which occurs when operating at zero internal to molten film tube pressure.
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公开(公告)号：US10391696B2
公开(公告)日：2019-08-27
申请号：US14997157
申请日：2016-01-15
Applicant: Addex, Inc.
Inventor： Robert E. Cree , William J. Randolph
Abstract: The present invention relates to an external cooling system for a molten film tube produced by a blown film tubular extrusion process, comprised of a divergent cooling element with a divergent cooling interface containing a cooling gas deflector spaced adjacent to the molten film tube and providing an expelled cooling gas (i) in a path opposing the flow of the molten film tube toward a first exit gap and (ii) in a path with the flow of the molten film tube toward a second exit gap. A minimum gap between the divergent cooling interface and the molten film tube occurs at the first exit gap and/or the second exit gap. Advantageously, the divergent cooling interface is provided with one or more compound angles to maximize stability and cooling efficiency. Additionally, multiple cooling elements can preferably be arranged in a stackable configuration to achieve higher throughput rates. Operation is characterized by improved film holding forces without the presence of high noise levels or detrimental vibration, flutter, and drag. Additionally, employing simplified single air delivery channels, and a stackable design, significantly reduces complexity and manufacturing costs.
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公开(公告)号：US20170203489A1
公开(公告)日：2017-07-20
申请号：US14997127
申请日：2016-01-15
Applicant: Addex, Inc.
Inventor： Robert E. Cree , William J. Randolph
CPC classification number: B29C48/913 , B29C48/0018 , B29C48/10 , B29C48/9125 , B29C48/92 , B29C55/28 , B29C2035/1658 , B29C2035/1666 , B29C2948/92514 , B29L2023/001 , B29L2031/7129
Abstract: The present invention relates to an external cooling system for a molten film tube produced by a blown film tubular extrusion process, comprised of one or more enclosures with one or more respective cavities that directly receive a portion of cooling gas emanating from one or more associated cooling elements. Each enclosure includes a port containing a variable exhaust device and optional flow buffer, acting to maintain a pressure differential between the cavity and an adjacent inside volume of the molten film tube, adjustable to optimize molten film tube stability cooling element efficiency and spaced apart dimension between cooling elements. Significant increases in production speeds are achieved with improved film quality over an increased range of tubular film sizes, down to a minimum size which occurs when operating at zero internal to molten film tube pressure.
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公开(公告)号：US20170203474A1
公开(公告)日：2017-07-20
申请号：US15348640
申请日：2016-11-10
Applicant: Addex, Inc.
Inventor： Robert E. Cree , William J. Randolph
CPC classification number: B29C48/9125 , B29C48/0018 , B29C48/10 , B29C48/913 , B29C55/28 , B29C2035/1658 , B29C2035/1666 , B29K2101/12 , B29L2023/001
Abstract: The present invention relates to an external cooling system for a molten film tube produced by a blown film tubular extrusion process, comprised of one or more enclosures with one or more respective cavities that directly receive a portion of cooling gas emanating from one or more associated cooling elements. Each enclosure includes a port containing a variable exhaust device and optional flow buffer, acting to maintain a pressure differential between the cavity and an adjacent inside volume of the molten film tube, adjustable to optimize molten film tube stability cooling element efficiency and spaced apart dimension between cooling elements. Additionally, at least one cooling element is provided, comprised of a divergent cooling element with a divergent cooling interface containing a cooling gas deflector spaced adjacent to the molten film tube and providing an expelled cooling gas.
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公开(公告)号：US20170203472A1
公开(公告)日：2017-07-20
申请号：US14997082
申请日：2016-01-15
Applicant: Addex, Inc.
Inventor： Robert E. Cree , William J. Randolph
CPC classification number: B29C48/913 , B29C48/10 , B29C48/9125 , B29C2035/1658 , B29K2101/12 , B29L2023/001
Abstract: The present invention relates to an external cooling system for a molten film tube produced by a blown film tubular extrusion process, comprised of one or more enclosures with one or more respective cavities that directly receive a portion of cooling gas emanating from one or more associated cooling elements. Each enclosure includes a port containing a variable exhaust device and optional flow buffer, acting to maintain a pressure differential between the cavity and an adjacent inside volume of the molten film tube, adjustable to optimize molten film tube stability cooling element efficiency and spaced apart dimension between cooling elements. Additionally, at least one cooling element is provided, comprised of a divergent cooling element with a divergent cooling interface containing a cooling gas deflector spaced adjacent to the molten film tube and providing an expelled cooling gas.
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Patent Agency Ranking
公开(公告)号：US20040207130A1
公开(公告)日：2004-10-21
申请号：US10845307
申请日：2004-05-12
Applicant: Addex, Inc.
Inventor： William Randolph , Robert E. Cree
IPC: B29C047/88
CPC classification number: B29C47/92 , B29C47/0026 , B29C47/883 , B29C47/8835 , B29C2947/92152 , B29C2947/92314 , B29C2947/92428 , B29C2947/926 , B29C2947/92647 , B29C2947/92809 , B29C2947/92904 , B29C2947/92923
Abstract: A plastic resin extrusion line for the production of blown film includes an external thickness control device that provides a controllable amount of air from an inlet side through an annular region to one or two sets of lips. Barriers that can be manually or automatically controlled are provided in the annular region for localized control of air flow and thus for localized thickness control. The pressure drop across the barriers is significant relative to that in the lips.
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公开(公告)号：US20030201557A1
公开(公告)日：2003-10-30
申请号：US10425418
申请日：2003-04-29
Applicant: Addex Inc..
Inventor： Robert E. Cree
IPC: B29C047/92
CPC classification number: B29C47/8835 , B29C47/0026 , B29C47/883 , B29C47/92 , B29C2947/92609 , B29C2947/9279 , B29C2947/92923
Abstract: An internal bubble cooling air control system in a blown film apparatus has sensors arranged to increase response time and reduce interference, and includes a high speed valve for fast actuation of air flow from a controller in response to signals received from the sensors.
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公开(公告)号：US20250153415A1
公开(公告)日：2025-05-15
申请号：US18955331
申请日：2024-11-21
Applicant: Addex, Inc.
Inventor： Robert E. Cree , William J. Randolph
IPC: B29C48/885 , B29C35/16 , B29C48/10 , B29C48/88 , B29C48/89 , B29K101/12 , B29L23/00
Abstract: The present invention relates to an external cooling system for a molten film tube produced by a blown film tubular extrusion process, comprised of one or more enclosures with one or more respective cavities that directly receive a portion of cooling gas emanating from one or more associated cooling elements. Each enclosure includes a port containing a variable exhaust device and optional flow buffer, acting to maintain a pressure differential between the cavity and an adjacent inside volume of the molten film tube, adjustable to optimize molten film tube stability cooling element efficiency and spaced apart dimension between cooling elements. Additionally, at least one cooling element is provided, comprised of a divergent cooling element with a divergent cooling interface containing a cooling gas deflector spaced adjacent to the molten film tube and providing an expelled cooling gas.
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公开(公告)号：US20240173910A1
公开(公告)日：2024-05-30
申请号：US18433676
申请日：2024-02-06
Applicant: Addex, Inc.
Inventor： Robert E. Cree , William J. Randolph
CPC classification number: B29C49/0015 , B29C48/10 , B29C48/913 , B29C48/0018 , B29C48/92 , B29C2948/926 , B29K2101/12 , B29L2023/001
Abstract: The present invention relates to an external cooling system for a molten film tube produced by a blown film tubular extrusion process. Embodiments of the present disclosure provide a unidirectional cooling element having a unidirectional cooling interface containing a cooling gas deflector spaced adjacent to the molten film tube. The unidirectional cooling element operably expels cooling gas in a path with the flow of the molten film tube toward an exit gap formed between the unidirectional cooling interface and the molten film tube. The minimum gap between the unidirectional cooling interface and the molten film tube occurs at the exit gap, and advantageously, the unidirectional cooling interface is provided with one or more compound angles to maximize stability and cooling efficiency.
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公开(公告)号：US11938668B2
公开(公告)日：2024-03-26
申请号：US17536236
申请日：2021-11-29
Applicant: Addex, Inc.
Inventor： Robert E. Cree , William J. Randolph
CPC classification number: B29C49/0015 , B29C48/10 , B29C48/913 , B29C48/0018 , B29C48/92 , B29C2948/926 , B29K2101/12 , B29L2023/001
Abstract: The present invention relates to an external cooling system for a molten film tube produced by a blown film tubular extrusion process. Embodiments of the present disclosure provide a unidirectional cooling element having a unidirectional cooling interface containing a cooling gas deflector spaced adjacent to the molten film tube. The unidirectional cooling element operably expels cooling gas in a path with the flow of the molten film tube toward an exit gap formed between the unidirectional cooling interface and the molten film tube. The minimum gap between the unidirectional cooling interface and the molten film tube occurs at the exit gap, and advantageously, the unidirectional cooling interface is provided with one or more compound angles to maximize stability and cooling efficiency.
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