摘要:
A method of making a die body configured to extrude a honeycomb body, the method comprising the step (I) of manufacturing a die body and the step (II) of predetermining an upstream slot width W1 of the die body such that the upstream slot width W1 is optimized while a root of each die pin includes a section modulus within a predetermined section modulus range. The method still further comprises the step (III) of predetermining a slot length L such that a pin stress is within a predetermined pin stress range.
摘要:
The present disclosure provides a flow device including a body disposed in an extrusion apparatus. The body is defined along a plane and has a first side and a second side. The second side is disposed opposite the first side. The flow device also includes a first face formed at the first side and a second face formed at the second side. The body has a thickness defined between the first face and second face. A plurality of feedholes is defined in the body between the first side and the second side. In addition, at least a portion of the first face or second face forms a curvature that extends outwardly from the plane.
摘要:
The present disclosure provides a flow device including a body disposed in an extrusion apparatus. The body is defined along a plane and has a first side and a second side. The second side is disposed opposite the first side. The flow device also includes a first face formed at the first side and a second face formed at the second side. The body has a thickness defined between the first face and second face. A plurality of feedholes is defined in the body between the first side and the second side. In addition, at least a portion of the first face or second face forms a curvature that extends outwardly from the plane.
摘要:
A honeycomb extrusion apparatus includes first and second vanes with respective first and second face portions. First and second axial widths of a circumferential feed area are respectively defined between the first and second face portions and the outer feed surface of the die body. In further examples, methods include the steps of selectively adjusting the first axial width and the second axial width of the circumferential feed area by respectively adjusting the first and second vane relative to the mask. In further examples, a honeycomb extrusion apparatus includes a plurality of mask segments that each includes an inner peripheral surface portion. Each of the plurality of mask segments are independently adjustable along a respective radial axis.
摘要:
Methods and apparatus for manufacturing strengthened ceramic honeycomb articles having thickened peripheral web segments by extruding, drying and firing honeycomb shapes formed by the extrusion of plasticized ceramic powder batches through honeycomb extrusion dies having peripheral slots incorporating outer widened slot portions of controlled depths, the controlled depths being selected to increase ceramic powder batch flow through the peripheral slots to a degree sufficient to form the thickened web segments but insufficient to cause geometric distortion of the thickened web segments.
摘要:
A honeycomb extrusion apparatus includes a die body and a mask defining a peripheral gap. The peripheral gap includes a first extrusion cross section at a first radial location relative to the extrusion axis and a second extrusion cross section at a second radial location relative to the extrusion axis. An overall flow area of the first extrusion cross section is less than an overall flow area of the second extrusion cross section. In further examples, methods include co-extruding a honeycomb body with an integral skin with the overall flow area of the first extrusion cross section being less than the overall flow area of the second extrusion cross section. In further examples, methods include compensating for different skin flow characteristics associated with a particular honeycomb network configuration of discharge slots in a die body.
摘要:
A honeycomb extrusion apparatus includes first and second vanes with respective first and second face portions. First and second axial widths of a circumferential feed area are respectively defined between the first and second face portions and the outer feed surface of the die body. In further examples, methods include the steps of selectively adjusting the first axial width and the second axial width of the circumferential feed area by respectively adjusting the first and second vane relative to the mask. In further examples, a honeycomb extrusion apparatus includes a plurality of mask segments that each includes an inner peripheral surface portion. Each of the plurality of mask segments are independently adjustable along a respective radial axis.
摘要:
A honeycomb extrusion apparatus includes a die body and a mask defining a peripheral gap. The peripheral gap includes a first extrusion cross section at a first radial location relative to the extrusion axis and a second extrusion cross section at a second radial location relative to the extrusion axis. An overall flow area of the first extrusion cross section is less than an overall flow area of the second extrusion cross section. In further examples, methods include co-extruding a honeycomb body with an integral skin with the overall flow area of the first extrusion cross section being less than the overall flow area of the second extrusion cross section. In further examples, methods include compensating for different skin flow characteristics associated with a particular honeycomb network configuration of discharge slots in a die body.
摘要:
A die apparatus and methods of making a die body can provide a skin slot extending through a honeycomb network and an end portion of a plurality of pins, wherein the skin slot includes opposed sides that are each in fluid communication with the honeycomb network. In further embodiments, methods are provided for co-extruding a honeycomb body and an integral skin with a die body including a skin slot.
摘要:
Disclosed is a method and apparatus for forming a circumferential skin surrounding a central cellular structure of an extruded honeycomb article. The method and apparatus may be used to produce defect-free skins and/or skins having large thickness and a high degree of particle alignment thereby preferably exhibiting CTE comparable to the extruded webs. These benefits are achieved by providing a die and method wherein a flow, Q, exiting any two active ones of a plurality of peripheral slots forming the skin is substantially equal. Also disclosed is a thick-skinned ceramic article having a thick extruded skin (ts′>5 tw′) with an I-value comparable to the webs.