Abstract: Lead weights for the balancing of automobile wheels are formed in an automatic operation. Molten lead is fed from a bath thereof to a lead weight-forming mold cavity defined by plates in edge abutting relationship and a block located in face abutting relationship with the plates and having a depression formed in the face thereof abutting the plates. The abutting edges of the plates have a groove formed therein extending the depth of the plates and defining a lead conveying passage. A weight retaining clip feed means is provided to feed individual clips from a source thereof to a holding station and clip positioning means is provided for moving individual clips from the holding station to the molding station. The plates include clip support means to support the clips at the molding station. A cutting knife is provided for removing tails from the weights after formation thereof.

Abstract: A multiple mold assembly is disclosed for molding articles in an injection molding apparatus. The assembly includes two molding sections that are alternatively shuttled from positions wherein one of the molding sections is in position for a molding operation, and the other molding section is in position for loading of inserts, performing preparatory or finishing operations, or removal of molded articles, to the reverse positions. The shuttle assembly of this invention is particularly adapted for use in a horizontal injection molding apparatus and for insert molding.

Abstract: Apparatus is disclosed for making a hollow, rib-reinforced article from a composite preform of two thermoplastic sheets. One sheet has a pattern of ridges or grooves, on a surface which contacts the other sheet, to permit the free flow of fluid from a marginal edge to interior regions of the preform. The apparatus includes (1) a heater, (2) mold platens which include a rib-forming mold cavity, (3) a ram to close and hold the mold platen in contact with the composite preform, and (4) a manifold which supplies a pressurized fluid to a marginal edge of the preform, thereby distending the thermoplastic sheet into the mold cavity. Then, the ram is further closed to seal nondistended areas of the preform, forming a hollow, laminated article.

Abstract: Apparatus for feeding workpieces to and discharging formed articles from a blow mold station generally comprising base means reciprocally movable above a blow mold having one or more pairs of feed and discharge openings and including stop means for temporarily obstructing passage of a workpiece through said feed opening, means for limiting the movement of said stop means and further resilient means associated with said base means to allow continued movement of the portion of the base means containing said opening after said stop means has stopped so as to remove the obstruction at said feed opening provided by said stop means and thereby allow the workpiece to continue through the opening into the blow mold.

Abstract: A method and apparatus for casting of metals into a continuous casting mold wherein metal is cast out of a ladle into a tundish having at least one non-regulatable bottom discharge and into at least one mold by means of a pouring tube. After the start of the casting operation the casting jet emanating from the bottom discharge is controlled and, if desired, corrected to the desired casting jet formation and thereafter the pouring tube is brought into the casting position through the casting jet.

Abstract: A two-part histologic tissue processing and embedding structure comprises an open-ended base pan and a perforated top member. For processing, the base pan and top may be sna-fitted together to form a compact housing for holding and transporting the tissue specimens through the various processing liquids. For embedding, the top is inverted so that the top and base pan may be loosely seated together as a mold for receiving paraffin which solidifies to embed the tissue specimen. For slicing, the base pan is used as a microtome clamp aligning device and is then removed and the top serves a mounting device for mounting the embedded specimen in a microtome clamp during slicing, and for storage the base pan may be secured back onto the top and placed over the remaining unsliced embedded specimen for protection.

Abstract: This injection blow molding machine has special provision for maintaining the plastic of a parison on a core rod at the orientation temperature of the plastic; and stretching the plastic of the parison lengthwise of the core rod for orientation in the direction of one axis without any substantial increase in the diameter of the parison. After this orientation in one axis, the temperature is controlled to maintain an orientation temperature, and the plastic of the parison is then blown to a larger diameter so as to obtain orientation in another axis for bi-axial orientation. The core rod is covered by an elastic balloon, and provision is made for obtaining flow of the plastic on the core rod lengthwise of the rod during the first orientation operation.

Abstract: A high speed corrugator for producing corrugated thermoplastic tubing comprises a pair of complementary upper and lower mold assemblies each comprising an endless chain of articulately interconnected mold blocks and means for guiding the mold blocks along an endless track having a forward run and a return run, each mold block being complimentary to a respective mold block of the other assembly, the mold blocks co-operating in pairs along said forward run to form an axially extending tunnel defining a tubular mold having a corrugated wall. The mold assemblies are positioned so as to locate the extrusion head at the entrance to the tunnel coaxially therewith, and extruded thermoplastic material is expanded by blow molding to conform to the interior surface of the mold. Cooling air is fed along an air distributor duct extending along the tunnel for cooling the molded thermoplastic, the cooling air being divided from the blow molding air by a baffle.

Abstract: An apparatus for transferring parisons from an oven to a blow mold has the capability of straightening up tilted parisons and gripping them uniformly without flattening the ends. The apparatus includes a gripper with jaws which open wide when opened, thereby providing an entry space between the jaws for a tilted parison as well as an upright parison and which in the closed position form an essentially complete circle about the parison to uniformly grip the same in cooperation with a push piece which moves into the open end of the parison.

Abstract: In the manufacture of hollow cast articles such as turbine blades or vanes, the article is cast in opposed halves on opposite sides of a "strong back" or mid-section, to which wax patterns are attached for the preparation of a shell mold around the strong back and patterns. The article halves, after removal from the mold, are bonded together.

Abstract: A modification to an apparatus for trimming thermoplastic material surrounding the bordering edge of an article formed in a die or mold from a sheet of pliable thermoplastic material such as glass arranged over the die or mold which is supported by a mold or die carrier, such apparatus including a trimmer having a lower cutting edge and disposed above the die with the center of the trimmer in vertical axial alignment with the center of the die and cooperative with a trimming edge of the die when the trimmer is lowered for trimming of the article formed in the die. A pressurized hydraulic fluid cylinder vertically actuates the trimmer.

Abstract: Apparatus is disclosed for injection molding a partitioned container having four sidewalls, an open top and a closed bottom. Thermoplastic material from a primary sprue flows through a runner system to inlet gates disposed to open into the mold cavity in a generally common plane lying at about the open top of the container to be molded and along opposed container sidewalls intermediate adjacent partition walls. Two mold structures are disclosed. A preferred mold comprises four block members defining, in a closed position, a hollow cavity corresponding to the exterior container dimensions but movable outwardly to an open position. A plurality of spaced core members are movable into and out of the hollow cavity to, respectively, define the container mold and permit ejection of the molded container therefrom. Other apparatus features are disclosed.

Abstract: An improvement in an apparatus for forming an outer corrugated tube wherein the corrugations of said tube abut an inner tube within said corrugated tube, said apparatus comprising means for forming an outer corrugated tube about a dye, means for forming said inner tube about a central mandrel within said corrugated tube, the improvement comprising means for urging an inner tube against the corrugations of said outer corrugated tube, said means comprising a presser floating mounted within said inner tube in facing relationship to said inner tube and bearing outward towards said inner tube.

Abstract: Apparatus for making flexible corrugated tubing of relatively large diameter and wall thickness from an extruded sleeve of uncured vulcanizable stock. The sleeve is placed on a cylindrical forming mandrel and radially expanded into an axially extensible and compressible forming member having interior edges that define successive convolutions coaxial with the mandrel and which form creases in the sleeve when it is radially expanded. The mandrel is supported at its opposite ends by two spaced forming head assemblies that surround the ends of the sleeve and which also engage the opposite ends of the forming member. When the sleeve is radially expanded to form bulges between the interior edges, the forming head assemblies are simultaneously moved in an axial direction toward one another by power means to compress the forming member and sleeve and thus, to produce embryonic corrugations in the sleeve.

Abstract: In a system for the production of molds for casting, a pair of pattern plates are disposed in an opposed facing relationship with a frame located therebetween in a manner whereby the opposing pattern surfaces of the plates, together with the frame, define an enclosed cavity within which a casting mold section may be formed. The frame is preferably provided with an opening through which the cavity may be filled with molding material which, after hardening, forms a mold section. After separation of the pattern plates and frame, the mold section is conveyed into assembled relationship with one or more other mold sections in order to form a mold for casting. Pattern plates and frames may be arranged in a mass production facility to continuously form mold sections which, when assembled, will provide a mold stack for producing multiple castings.

Abstract: A mold for obtaining metallic parts with an orientated crystalline struct by the directed solidification of an alloy is disclosed. The mould comprises a body of refractory mold that is a good heat conductor and on the inner wall of said body is provided a chemically protective lining of dense refractory metal oxide, with a high degree of purity, deposited on said body by blowpipe projection as a thin non-porous layer. The thickness of the metal oxide lining is in the order of a tenth of a millimeter to five tenths of a millimeter, the oxide being choosen in the group constituted by aluminium oxide, zirconium oxide, magnesium oxide and thorium dioxide with a degree of purity at least equal to 99.5 %.

Abstract: The present invention relates to reusable hollow formwork elements of elastic material which may be used for the concreting of pipelines, and which by filling with a gaseous or liquid medium, can be given compressive resistance. The invention also relates to a method of operating such formwork elements.

Abstract: A method and apparatus for packaging electronic components such as for example pulse transformers or the like with a thermosetting material such as for example a phenolic or epoxy resin. A pulse transformer element comprising a toroidal ferrite core having coils wound thereon embedded in a thermosetting base member provided with an intermediate flange-like portion, and terminal pins, is inserted in a lower mold cavity formed in a mold magazine, with the terminal pins inserted in elongated slots formed in the bottom surface of the lower mold cavity which is isolated by the pulse transformer element per se from the upper mold cavity into which the thermosetting material is injected.

Abstract: Methods of and apparatus for making plastic containers with integral rims, utilizing a transfer ring means having an aperture and an annular groove, in which the aperture is closed to define a space for reception of thermoplastic material, which is compressed to form it into a diaphragm with the material filling said groove forming the rim of the diaphragm, the transfer means carrying the diaphragm is positioned on a mold having a cavity corresponding to the shape of the container, the diaphragm is formed into a container in the mold cavity, and the container is removed from the transfer means with the rim of the diaphragm as molded in said groove intact with the container and forming the rim of the container.

Abstract: In the manufacture of hollow turbine blades or vanes especially those having a columnar crystalline growth in the alloy, the blade is cast in two opposed halves against a central mold element, the latter being rigid enough to avoid deformation during heating of the mold prior to pouring and during solidification. This central element has on opposite surfaces the configurations of the inner surfaces of the hollow blade. Cooperating with this inner element are outer elements having cooperating inner surface configurations of the convex and concave sides of the blade respectively. After the blade halves are cast simultaneously in the assembled mold and removed therefrom they are bonded together to form a complete blade.