摘要:
An interchangeable unit adapted to couple to a computer numerical control (“CNC”) machine is disclosed comprising a holder that couples to a spindle of the CNC machine, a controller, wherein said controller is configured to receive the rotational speed of the spindle as an input, and a material processing unit, wherein said material processing unit executes a first function in response to a first rotational speed range of the spindle and executes a second function in response to a second rotational speed range of the spindle.
摘要:
A device according to various embodiments for drying wet grain can include a first screw configured to receive wet grain. A second screw receives the wet grain from the first screw. At least one mechanism is included within at least one of the first screw and the second screw to vaporize water content in the wet grain.
摘要:
A liquefier assembly for use in an additive manufacturing system, which includes a rigid member having a gap, a liquefier tube operably disposed in the gap, one or more heater assemblies disposed in the gap in contact with the liquefier tube, and configured to heat the liquefier tube in a zone-by-zone manner, preferably one or more thermal resistors disposed in the gap between the rigid member and the heater assemblies, and preferably one or more sensors configured to operably measure pressure within the liquefier tube. The one or more heater assemblies may be operated to provide dynamic heat flow control.
摘要:
An extruder is disclosed, and more particularly, a twin screw extruder for mixing, compounding, kneading and/or extruding of materials. The twin screw extruder includes a barrel assembly having a housing. The twin screw extruder further includes a first screw provided within the housing and comprising threads. The twin screw extruder further includes a second screw provided within the housing and comprising a threaded portion and a shaft portion devoid of threads. A drive system which drives the first screw and the second screw.
摘要:
A chew toy of non-uniform shape may be manufactured from an edible starch composition by introducing said composition to an extruder having a barrel and subjecting the composition to shear and heat to form a melt, and conveying the melt through an adjustable orifice while varying the cross-section dimensions of the orifice to form an extrudate having thickness dimensions that varies along its length. This may be followed by cutting the extrudate to length. The extrudate may also be passed between cooperating cavities and formed to shape. The extrudate may also be guided into predetermined patterns by repositioning the die relative to a molding surface.
摘要:
A process of obtaining plastic compound based on fibrous plant material, plastic compound based on obtained fibrous plant material and equipment for extrusion of plastic compound based on fibrous plant material. The objective is to fundamentally give to the final product a greater mechanical resistance against natural degrading agents, such as weather and infestations, and to this end, proposes changes in its procedural and manufacturing stages, in order to provide, essentially, the increase in the density of the final product, making it more compressed and maintaining its organoleptic properties unchanged.
摘要:
Three-dimensional printer fabrication is improved receiving a digital model of an object, the digital model specifying two or more different build materials; prioritizing the two or more different build materials with a ranking; identifying exclusive locations in the plurality of layers where a surface layer of the object has one of the two or more different build materials; generating an external structure for the object according to one or more design rules; matching a first build material of the external structure to a second build material of the object at each of the exclusive locations; and generating tool instructions for fabricating the object and the external structure using at least the first build material and the second build material.
摘要:
Method for making multiple durometer bulb seals includes cooling separately at least one structural member and at least one bulb portion of the bulb seal, which have different durometers and shapes. At least a first extrusion is drawn through a die of an extruder for forming a structural member profile and the extruded material is pulled by a first pulling device along a longitudinal axis to a first calibrator device and then through a first cooling tank to cool the structural member profile to a predetermined temperature. Cooling medium directly contacts the outer and inner surfaces of the first profile. The bulb portion is extruded and attached onto the cooled structural member and pulled downstream to a second calibrator device and through a second cooling tank to cool the profile a predetermined amount. Disparity in cooling expansion and cooling differential between the multiple durometers and shapes is avoided or overcome.
摘要:
A process for producing a solution blend of a polybenzimidazole (PBI) and a polyetherketoneketone (PEKK). The PBI is mixed with sulfuric acid at a temperature between 40° C. and 80° C. for 30 minutes to 2 hours to produce a PBI solution then cooled to room temperature to form a cooled PBI solution. Then PEKK is added to the cooled PBI solution to form a mixture and that mixture is stirred from 30 minutes to 2 hours at room temperature to form a stirred mixture. The stirred mixture is poured into an excess of water being stirred swiftly to form an aqueous mixture. The aqueous mixture is filtered to produce a blend. The blend is washed with water and dried. The resulting blend can yield a blend in all proportion from 1/99 PBI/PEKK to 99/1 PBI/PEKK.