EXTRUSION DIES AND METHODS AND APPARATUSES FOR FORMING THE SAME

    公开(公告)号:US20210402644A1

    公开(公告)日:2021-12-30

    申请号:US17473163

    申请日:2021-09-13

    Abstract: A method of manufacturing a honeycomb extrusion die. The die includes a feed hole plate and a pin assembly comprising pins extending feed hole plate. One or more of the pins includes a head including an alignment surface, flow surfaces, a contact surface, and a taper located between the alignment surface and the contact surface. The pins are adhered to the output surface of the feed hole plate at their respective contact surfaces. A tail of each pin is connected to the head and extends away from the feed hole plate. The alignment surfaces of adjacent pins contact each other, such that the tails of adjacent pins are spaced apart to at least partially define discharge slots. The flow surfaces of adjacent pins are spaced apart to at least partially define channels to enable flow from the feed holes to exit the honeycomb extrusion die through the discharge slots.

    HONEYCOMB EXTRUSION DIES AND FORMING METHODS

    公开(公告)号:US20210308928A1

    公开(公告)日:2021-10-07

    申请号:US17058397

    申请日:2019-05-30

    Abstract: A honeycomb extrusion die (120) includes a die body (302) including an inlet face (306) and an exit face. The die body (302) has slot inlets (309) and a plurality of pins (320, 500) disposed between the slot inlets (309) and the exit face. The plurality of pins (320, 500) include side surfaces (322, 500B) configured to define a matrix of intersecting slots (324), wherein the matrix of intersecting slots (324) has slot exit (509) widths at the exit face. Divots (526) extend into a plurality of the side surfaces (322, 500B) between the slot inlets (309) and the exit face. Each individual divot (526) has a divot san depth (D55) extending into a side surface (500A, 500B, 502A, 502B) of the side surfaces (322, 500B). A ratio between a slot exit width (W53) W53 of an individual slot (324) and the divot depth (D55) of an individual divot (526) extending into a side surface (500A, 500B, 502A, 502B) of the individual slot (324) is greater than 1.2. Methods of forming honeycomb bodies with honeycomb structures are provided, as are other aspects.

    Extrusion dies and methods and apparatuses for forming the same

    公开(公告)号:US11135740B2

    公开(公告)日:2021-10-05

    申请号:US15555780

    申请日:2016-03-04

    Abstract: A honeycomb extrusion die (100), a method of making the same, and an apparatus for forming the same. The die (100) includes: a feed hole plate (202) comprising an input surface (202A), an opposing output surface (202B), and feed holes (108) configured to guide a batch material from the input surface (202A) to the output surface (202B); and a pin assembly (204) comprising pins (300) disposed on the feed hole plate (202). At least one of the pins includes: a tail (304); a head (302) connected to the tail (304) and comprising alignment surfaces (314) configured to align the pins (300), flow surfaces (316) disposed between the alignment surfaces (314), and a tapered portion (310) comprising a contact surface (308) adhered to the output surface (202B) of the feed hole plate (202); and a first groove (306) disposed between the head (302) and the tail (304). In the pin assembly (204), the alignment surfaces (314) contact adjacent pins (300) to align the pins (300), such that discharge slots are at least partially defined by the tails (304) of the pins (300).

    Underdrain assembly and method of manufacturing same

    公开(公告)号:US10981089B2

    公开(公告)日:2021-04-20

    申请号:US16853225

    申请日:2020-04-20

    Abstract: An underdrain apparatus and a method for manufacturing such apparatus are provided. The underdrain apparatus can be extruded in long sections as a unitary part. The underdrain apparatus may be extruded in various sizes, shapes, and materials. Further, the underdrain apparatus may include a passageway for transporting water to and from the filter media and/or air to the filter media. In some embodiments, apertures are formed in the underdrain apparatus during an extrusion process to provide a path between the passageway and the filter media.

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