Abstract: An extrusion apparatus includes a rotary shell having plural circumferential rows of extrusion orifices and a stationary inner member, forming in cooperation with the shell recesses communicating with the orifices, and metering pump for supplying icing to individual passageways formed in the stationary member, so that precisely metered amounts of icing are extruded through the extrusion orifices, the icing then being cut off by a stationary member which located at a bottom portion of the rotary shell for deposit onto biscuits traveling upon a conveyor belt.
March 11, 1985
Date of Patent:
July 25, 1989
Nabisco Brands, Inc.
Albert A. Pinto, Edward W. Selis, George W. Carroll
Abstract: A mold, typically an injection mold, comprises a cavity member and a core member relatively movable between open and closed positions to define a first parting line and a molding chamber between the core and cavity members in the closed position. A sprue aperture is provided, communicating with the molding chamber to provide molding compound to the chamber. In accordance with this invention the cavity member defines forward and rearward portions movable between open and closed positions and proportioned whereby objects molded in the molding chamber can be removed from between the forward and rear portions when the cavity member is in its open position.
Abstract: A compression forming apparatus for forming a thermoplastic resin sheet is disclosed wherein a thermoplastic resin blank is compressed between a pair of heated mold plates, the mold plates are cooled to solidify the thus-formed sheet, and the sheet is taken out from the mold plates. This compression forming apparatus has a clamping device, a pair of cooling die plates, a pair of mold plates which are attached to the cooling die plates, means for heating the mold plates, and springs or actuators enabling the mold plates to be held in contact with the cooling die plates when the mold plates are clamped and held in non-contact with the cooling die plates when the mold plates are opened.
Abstract: A die assembly for plastic pelletizing apparatus of the type including a cooling bath into which the plastic is extruded. The die assembly includes a heated main body having first and second oppositely disposed exterior faces connected by a plurality of relatively small extrusion passageways. A layer of thermal insulation material overlies the second face, and a cover member having an outer surface adapted to be exposed to the cooling bath is positioned over the thermal insulation material and joined to the main body. Wear resistant insert members formed from a material having a higher coefficient of thermal conductivity than the material from which the cover member is made extend from the outer surface of the cover member through the layer of insulation into the main body. Extrusion outlet orifices are formed through the insert members and define continuations of the extrusion passageways of the main body.
Abstract: The present invention increases the shot capacity and the screw recovery time of an injection molding machine without increasing hydraulic pump capacity or motor horsepower. In accordance with one aspect of the invention, an existing injection molding machine is retrofitted with two cylinder and piston arrangements which are bolted onto the machine between its plasticizer barrel and its melt manifold. One of the cylinder and piston arrangements is employed to perform a mold-filling operation, whereas the other cylinder and piston arrangement is employed to perform packing and suck back operations.
Abstract: A straight-hydraulic mold clamping system for use in a molding machine has a bearing portion for a rod of a mold clamp cylinder provided with a plurality of annular oil grooves within which an oil functions, and utilizes the rigidity of the rod so as to horizontally support a movable platen and a molding die attached to the movable platen in a cantilever manner and maintain the horizontality of the movable platen and the molding die.
Abstract: A multipiece die for extruding honeycomb structures that facilitates a variation of geometries in the formation of honeycomb structures by reducing the amount of machining necessary to change die configurations for different honeycomb arrangements. The die has at least two sets of channel forming pins which are supported from separate die bodies. The channel forming pins when brought together with the separate die bodies define a series of discharge slots by which the extrudable structure is ejected from the die. A plurality of cavities communicate extrudable material from inlet and outlet sides of each die body. The cavities in downstream die bodies, downstream being taken with respect to the flow of extrudable material, are made with sufficient size to allow pins depending from upstream die bodies through the cavities while still allowing enough open area to provide a feed passage for the extrudable material.
Abstract: An apparatus using a shape memory alloy such as nickel-titanium as a die material for performing pseudo-isostatic pressing by using a uniaxial mechanical press to densify a powder mixture, preform or presinter with or without the use of pressure transmitting powder. The process can also be used to perform thermal mechanical work on any article to obtain near net shape. With controlled thermal mechanical processing and fabrication of the shape memory alloy into a die configuration, its shape can be changed from a low temperature configuration to a high temperature configuration after being heated. The shape transformation temperature for nickel-titanium alloy in particular, ranges from about -200 degrees Centigrade to +100 degrees Centigrade depending primarily upon alloy composition.
Abstract: A spinneret assembly for conjugate spinning includes (1) a spinneret plate provided with a number of spinning holes and (2) a distribution plate superposed closely upon the upper face of the spinneret plate onto which two kinds of spinning liquids are to be fed. The distribution plate is arranged in such a manner that, of separate spinning liquid paths for the two kinds of spinning liquid comprising a number of separate and parallel inlet grooves for receiving individually and alternately the two kinds of spinning liquids fed from above and guide paths for guiding individually the two kinds of spinning liquids fed out of the inlet grooves onto upper openings of the spinning holes in the spinneret plate, a part or whole of each guide path forms a pressure-adjusting means. Liquid storing chambers are provided on the lower face of the distribution plate at positions corresponding to the spinning holes.
Abstract: An apparatus is described for filling notches in a notched workpiece with a soft filler material having a viscosity similar to glasses. The apparatus has a bottom portion which receives the notched workpiece and a top portion. The top portion has a lower surface adapted to apply a concentrated pressure in the direction of the bottom portion to enhance flow of the soft filler material into the notches when that material is inserted between the assembled top and bottom portions.
Abstract: An apparatus using a shape memory alloy such as nickel-titanium as a reaction vessel for self-sustaining combustion (SSC) reaction synthesis of ceramics, intermetallics, metal or ceramic matrix composites and the like and as a die material for pseudo-isostatic hot pressing by providing a uniaxial mechanical press to density the reaction products with or without the use of pressure transmitting powder. The process can also be used to perform thermal mechanical work on any article synthesized by the self-sustaining combustion reaction to obtain near net shape. With controlled thermal mechanical processing and fabrication of the shape memory alloy into a die configuration, its shape can be changed from a low temperature configuration to a high temperature configuration after being heated. The shape transformation temperature for nickel-titanium alloy in particular, ranges from about -200 degrees Centigrade to +100 degrees Centigrade depending primarily upon alloy composition.
Abstract: A triple-wall foam coextrusion apparatus in which inner and outer layers of one synthetic resin material are coextruded with an intermediate layer of another synthetic resin material, and wherein the passages for the first material are inclined to the axis along which the second material is extruded around a spider to ensure uniform flow.
November 19, 1986
Date of Patent:
March 15, 1988
American Maplan Corporation
Steven E. Spence, Robert F. Shamet, Flavio Da Silva, Horst Eigruber
Abstract: Spring-loaded rollers for a mold have a sealed axle mount which passes through the roller into a supporting portion of the seats in the platen to prevent the roller from rotating, twisting or otherwise moving in the seat in the roller assembly and in the mold. The roller assembly is easily removed from its seat through the use of a removal device cooperating with screw threads in the roller. A plurality of rollers are used to permit a mold to be easily moved into and out of position in a press. The mold is thus mounted in position since the rollers limit the ability of the mold to move laterally. The seals are dished TEFLON disks which overfit the axle and interfit either against the sides of the roller or within slots cut circumferentially on either side of the roller. The walls of the slot may be undercut and/or otherwise shaped. The invention makes it very easy to move the heavy molds into and out of the press thereby reducing operator fatigue.
Abstract: A pressure transmitting apparatus for hot - press sintering comprises a container 21 with a lid 22, a piston 23, a superplastic alloy medium 24a and 24b and heaters 25a, 25b, and 25c. A force is applied to generate an isostatic compression pressure on the powder body.
Abstract: This invention relates to a screw used in an equipment for molding thermoplastic resin, in which a mixing section is provided at a position adjacent a shearing section, and the pitch of a stress relaxation section is preset to the pitch, at which satisfactory kneading can be performed without giving high shearing to the resin. With this screw, even if high-speed extrusion molding is performed, the pressure of resin is not fluctuated, molded parts can avoid lowered material quality and outstanding molded parts can be provided.
Abstract: An underwater pelletizer providing more efficient formation of uniform size pellets including the provision of a taper on the die holes so that polymer will freeze near the exit and form an insulated die hole and a resultant cylindrical die hole for smooth polymer flow, axially movable ball bearing assemblies to support the pelletizer shaft in a housing, a threaded assembly with a thrust bearing to axially adjust the pelletizer shaft for compensating for blade wear, radial clearance for the outer race of the thrust bearing to eliminate preloading of the axially movable ball bearings, a gear coupling between the shaft and driving motor to permit axial movement of the shaft for blade adjustment, and a spring support for the pelletizer, all of which cooperate to form an effective underwater pelletizer which will efficiently produce uniform plastic pellets.
January 31, 1986
Date of Patent:
March 1, 1988
Gala Industries, Inc.
General J. Pauley, Donald W. Smith, Dennis M. Chaney, Samuel F. Hannah, J. Wayne Martin
Abstract: A press for holding mold segments that are joined to form a mold cavity into which liquid chemicals are injected and reacted to form solid objects includes tie bar extenders to provide field adjustment of the press geometry and further includes booking plate spacers to unload booking plate hinge pins during mold clamping.
September 23, 1985
Date of Patent:
February 23, 1988
Gordon Breuker, Rodger Dangremond, Jerry V. Scrivo
Abstract: A tire press of the slideback type has mounted on the press head beam a precision loader for the uncured tires. The beam moves vertically and then laterally or horizontally while maintaining the top mold section in parallelism with the bottom mold section for concurrent opening, loading of the uncured tire and discharge of the cured tire from the press. The invention includes a pair of tire chucks mounted on a loader beam for precise vertical movement through an electric motor driven rack and pinion drive. The loader beam is in turn mounted on the press head beam but through a lost motion connection. In this manner the loader is uncoupled from the press head during the final loading horizontal travel thereof to allow independent movement of the loader and press head. The loader is biased toward the press head by springs.
Abstract: Herein disclosed are a stamper for replicating a high-density data recording disk, wherein there is formed on a substrate a multi-layered metal film, in which a plurality of metals of different kinds are laminated and which has a thickness equal to the depth of a pit, by an etching technique having a selectivity for the kinds of metals and a process for producing that stamper. Since one or more pits having different depths are formed very precisely, the recording density is increased, and the quality of a readout data signal is improved while dispensing with the plating step. As a result, there can be attained an effect that the productivity and economy can be improved.
Abstract: A device for moulding soles composed of a rubber tread and a polyurethane intermediate layer and for directly attaching the soles to shoe shafts includes a bottom work station in which the rubber tread is moulded, a top moulding station in which the polyurethane intermediate layer is moulded between the rubber tread and a shoe shaft, and an intermediate cooling station wherein the rubber tread is cooled prior to being transported to the top moulding station.