Abstract: An applicator is utilized in applying a thermoplastic composite filament to a mandrel so as to form a structure. The filament and the surface of the mandrel are caused to move simultaneously and in a common direction relative to the applicator so that the filament is continuously fed from the applicator into engagement with the surface of the mandrel. At least one stream of heated fluid is applied to the filament so that it impinges thereon not only at a location preceding the location of the applicator, but also along the length of the filament to and beyond the applicator and up to and including the region where the filament first comes into contact with the mandrel. At the same time a stream of heated fluid is applied directly to the surface of the mandrel within that region so that the mandrel is heated prior to being contacted by the filament.

Abstract: A method of making a molded article by injecting into a mold filled with reinforcing material a resin composition including (a) 40 to 80% by weight of a resin including an oligomer having a number average molecular weight of 900 to 3,000 in terms of polystyrene equivalent obtained by gel permeation chromatography and having two or more terminal (meth)acrylate groups and an unsaturated polyester, and (b) 20 to 60% by weight of methyl (meth)acrylate monomer.

Abstract: An inner shielding material and a method of manufacturing the same, wherein the material comprises a steel sheet 0.10 to 0.25 mm thick of a composition of .ltoreq.0.005% C, .ltoreq.2.0% Si, .ltoreq.0.4% P, 0.1 to 1.0% Mn, 0.01% S, .ltoreq.0.01% sol.Al, .ltoreq.0.01% N and the balance Fe and residual impurities, having a hardness H.sub.v (500 g) of 90 or greater and a grain size of 7 or less when measured by ferrite grain size; and a blackened layer on the surface of the steel sheet comprising primarily FeO formed by transformation of Fe.sub.3 O.sub.4 and having superior adhesion.

Abstract: Seizure resistance of boronized sliding material is improved by surface microstructure, i.e., co-existence of the Fe.sub.2 B phase and Fe.sub.3 B phase.

Abstract: A process to prepare pinhole-free, ultrathin, polymethylmethacrylate films having thicknesses of about 400 angstroms or less. The films are prepared by dissolving a polymethylmethacrylate polymer in a mixture of solvents to form a casting solution and then casting the solution upon water to form a free-standing film. The films find particular utility in separatory applications.

Abstract: An automated method is provided for selectively separating resin pellets having a gel count below a specified maximum from pellets having a gel count above the specified maximum, while the pellets are flowing in a pneumatic conveyor. The separation is based on an essentially continuous measurement in which a laser beam is utilized to detect the number of gels in a film made from pellets withdrawn as a sample stream from the main pellet stream. In response to the gel count measurement, a control signal is established that is utilized to manipulate a diverter valve located in the pneumatic conveyor, which diverts plastic pellet flow between a preferred storage means storing pellets having a low gel count and a secondary storage means for storing pellets having a higher gel count.

Abstract: A method particularly adapted for making a complex shaped composite component that has reduced bridging defects. The method comprises disposing a composite prepreg on to a substantially flat tool. The composite prepreg has a substantially flat section and at least one prepreg member extending from and substantially perpendicular to said flat section. A layer, at least about 125% of said composite prepreg height, of a said flowable particulate silicone rubber is disposed in substantially complete contact with the composite prepreg surface. The particulate silicone rubber has a flow rate of at least 0.6 gram/second through a 1.1 cm diameter pipe 7.6 cm long under applied pressure of 10.34 MPa at room temperature. The layer of solid flowable rubber is covered with a bag to effect a gas tight seal. The bag is exposed to pressures which are transferred to said prepreg by said solid flowable polymer. The composite prepreg is exposed to temperatures to form a composite component.

Abstract: A sculptured structural fiberboard product is formed using a mold that includes porous forming areas which, in one embodiment, are porous forming mandrels movably mounted on the mold, and liquid impervious thimbles which removably cover the porous areas. A fiber network is formed as water is drained off through the porous areas and the thimbles are moved to gradually unveil the porous areas during the mat formation. When mandrels are used, the mandrels are withdrawn in cooperation with a pressing force applied to the mat to consolidate and dry the web. The porous areas can also act as heat and mass transfer means during consolidation and drying. An alternative embodiment permits formation of laminated products and another alternative embodiment permits close control over the product density during consolidation and drying.

Abstract: Methods of injecting into a cavity an at least three-layer flow stream having a fast flow stream line, are provided which include establishing the flow of material of first and second layers of the flow stream to form an interface therebetween at a first location not coincident with the fast flow stream line, interposing the flow of material of a third layer in the interface, and moving the third layer to a second location relatively more proximate to, substantially coincident with, or across from and not substantially coincident with the fast flow stream line. This moving achieves foldover of the third layer and can be effected by selectively changing the flow of material(s) on one side of the third layer relative to the flow of material(s) on the other side thereof, at or shortly after the interposition of the third layer. Preferably, the interface is annular and the interposition is at substantially all places around the interface.

Abstract: A manufacturing method for ceramic microspheres including the steps of; forming a suspension of ceramic fine powders as a dispersed phase and water as a dispersion medium; dispersing the suspension as droplets in a high boiling point liquid which has substantially the same specific gravity as the suspension and which is immiscible with water and nonreactive with the ceramic fine powder to make spherical particles; and subjecting the resultant product to drying and calcination.

Abstract: A method for producing a rigid resin mold for preparing plastic moldings which comprises:(1) preparing a composition (I) consisting essentially of(A) a cyanate ester resin composition, and(B-1) a metallic substance which does not substantially accelerate gelation of the cyanate ester resin composition (A),(2) preparing a composition (II) consisting essentially of(C) epoxy resin, and(B-2) a metallic substance which accelerates gelation of the cyanate ester resin composition (A) and does not substantially accelerate gelation of the epoxy resin (C) at temperatures below or equal to 100.degree. C.,(3) mixing composition (I) of step (1) and composition (II) of step (2) to form composition (III),(4) casting composition (III) of step (3) into a mold(5) and gelling the cast resin.

Abstract: A process for making a balloon for use on a multilumen catheter using as a form for the balloon a mandrel having at least one groove and at least one score line. The mandrel is rotated while metering into the groove a thermoplastic adhesive. The balloon stock is formed by coating the mandrel with a solid thermosetting polyurethane prepolymer. After cooling of the mandrel a film of thermoplastic adhesive is wrapped over the balloon at about the score line. Once the assembly is cured the balloon stock is removed to result in a balloon having an adhesive film on the internal wall at one end and an adhesive film on the external wall at the other end.

Abstract: A method of forming a fibrous web useful for compression molding stiff, board-like structural substrates for panels by thoroughly intermixing a blend of wood fibers and synthetic plastic fibers with a dry, powdery, resinous molding material uniformly disbursed throughout the blend. The mass of intermixed fibers and resinous molding material is covered with a thin, randomly oriented, fibrous scrim material and the fibers are locked to each other and to the scrim mechanically by means of needling them together.

Abstract: Colors of sections of several beef carcasses are measured and the colors are classified into a predetermined number of grades of tone. Colored silicon plastic sol is poured in a glass cell for each grade, and the color of each plastic sol is matched with the classified beef color. The plastic sol is poured into a female mold having an irregular surface resembling a surface of a section of a beef, and the plastic is taken out from the female mold when it becomes gel.

Abstract: A process using molds for curing a composite skin-stiffeners assembly from fiber material impregnated with a resin. This process allows molding and co-curing of single-skin type panels with integral stiffeners, allows stiffeners of variable heights, thicknesses and widths, allows substantial freedom in the layout of stiffeners, and allows even integral cross-stiffeners. Bonding and mechanical fasteners are also dispensed with. This process is further characterized by providing a stiffener forming mold part having a corrugated face, laying composite material over the ridges defined by the corrugated face to form stiffeners of open cross-sectional shape and interspacing gaps between them in bonding contact with skin forming material, and co-curing of the skin-stiffeners assembly.

Abstract: A powder for use in compressing molding is made by coating a high amount of filler by weight, for example calcium metasilicate with a thermoplastic resin, for example, nylon. The amount of filler to nylon is typically above 60% to 98% by weight of the powder. The resultant powder is employed in a compressive molding process in a metallurgy press to manufacture an article which is structurally stable, and which is later solidified and strength increased by crystallizing the nylon or resin in an oven raised to the crystallization temperature of the resin to result in a compressively molded article having high strength characteristics and requiring a small amount of resin as compared to conventional molding processes.

Abstract: An injection molded universal joint (10) includes a central retaining member (40) captured between spherical balls (30, 32, 34, 36) seated in bores (22, 24, and 26, 28) located in diametrically opposed arms (14, 16, and 18, 20) of respective shaft members (11, 12). The spherical balls are each pressed through an associated bore until a portion of the ball extends radially inwardly of the arm, and then maintained in position by a plastic material (80) insert molded into and retained in the bore. The insert molded plastic material (80) retains each of the spherical balls in place and permits the central retaining member (40) to be accurately positioned and with a predetermined preload applied to the universal joint (10).

Abstract: Particulate mats are transported from the downstream end of an upstream conveyor normally moving continuously in a longitudinal transport direction at a predetermined relatively slow speed to a press downstream in the direction from the upstream conveyor that receives the mats and presses them into hard panels by supporting the mats between the upstream conveyor and the press on a downstream conveyor having an upstream end spaced downstream from the downstream end and a downstream end at the press and an intermediate conveyor extending between the upstream end of the downstream conveyor and the downstream end of the upstream conveyor and having a length in the direction at least equal to that of each of the mats in the direction. A carriage supporting the downstream end of the upstream conveyor, the intermediate conveyor, and the upstream end of the downstream conveyor is reciprocated in the direction at a frequency related to mat size and speed.