公开(公告)号：US20220080647A1

公开(公告)日：2022-03-17

申请号：US17536236

申请日：2021-11-29

Applicant: Addex, Inc.

Inventor： Robert E. Cree ,  William J. Randolph

IPC: B29C49/00 ,  B29C48/10 ,  B29C48/88

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.

公开(公告)号：US20190275722A1

公开(公告)日：2019-09-12

申请号：US16422197

申请日：2019-05-24

Applicant: Addex, Inc.

Inventor： Robert E. Cree ,  William J. Randolph

IPC: B29C48/88 ,  B29C48/10

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.

公开(公告)号：US10391697B2

公开(公告)日：2019-08-27

申请号：US14997127

申请日：2016-01-15

Applicant: Addex, Inc.

Inventor： Robert E. Cree ,  William J. Randolph

IPC: B29C47/88 ,  B29C48/88 ,  B29C48/00 ,  B29C55/28 ,  B29C48/10 ,  B29L31/00 ,  B29L23/00 ,  B29C35/16 ,  B29C48/92

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.

公开(公告)号：US20170203490A1

公开(公告)日：2017-07-20

申请号：US15235868

申请日：2016-08-12

Applicant: Addex, Inc.

Inventor： Robert E. Cree ,  William J. Randolph

IPC: B29C49/00

CPC classification number: B29C49/0015 ,  B29C48/0018 ,  B29C48/10 ,  B29C48/913 ,  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.