Abstract: This invention relates to cap means for preventing resin from remaining in a mold of a runnerless injection molding apparatus. The cap means is of a frusto-conical profile and incorporated in a space formed adjacent to a front end of a heating cylinder. Further, the cap means is provided with an opening from which a pointed tip member of the heating cylinder can project. The invention aims at removing resin scorching, its thermal decomposition, inconveniences of color or material exchange or the like.

Abstract: The drain openings in movable and fixed platens in a press unit are wider than the largest praticle in a slurry to be dewatered and are formed by arcuate ribs dimensioned to resist the transverse forces developed as the granular particles from bridges across the slotted drain openings in rendom order. Liquid expressed through the movable platen is directed radially outward through a subplaten, passes back through the clearance between the piston carrying the movable platen and the mold wall and is discharged through a sealing and collecting ring having a series of annular grooves which communicate with longitudinal radially extending slots having longitudinal bores at the radial extremity thereof which direct the liquid to an annular passage for discharge.

Abstract: A hot manifold system for use in the injection molding of plastics is disclosed wherein runner channel heating is accomplished by heat pipes disposed within the manifold adjacent to the runner channels contained therein. The manifold system is an elongated structure having a heat receiving portion and a runner containing portion such that heat input may be applied to the heat receiving portion at an accessible location relative to the mold and conveyed to the remainder of the manifold for uniform heating thereof by the heat pipes.

Abstract: A transmission member of the kind comprising a floating core free to move in all directions within a casing, the floating core comprising at least two arms disposed at an angle to one another, one for supporting a driven member, the other for actuation by a driving member, and the casing comprising an internal housing with a configuration which duplicates that of the floating core. Between the floating core and the walls of the internal housing is disposed there is disposed an insulating layer of a solid elastic material. Use of the transmission member is directed, in particular, to ultrasonic assistance in compacting or drawing.

Abstract: In a plastic or die cast molding machine having opposed stationary and movable platens adapted to receive, mount and support a sectional plastic or die cast molding die having stationary and movable clamp plates, opposed quick change locator clamp assemblies mounted upon the platens, each clamp assembly including a body plate secured to a platen. Laterally spaced index pins project from the body plate for receiving corresponding spaced locator slots in the clamp plates. Longitudinally spaced opposed pairs of plate clamps are adjustably and guidably mounted upon opposite sides of the body plate adapted to receive and retainingly engage opposite sides of a clamp plate.

Abstract: A split-mold safety lock for preventing unintended separation of mold components during lifting and manipulation thereof. The invention employs a split ring capable of being swiveled in a circle of 360.degree. and being pivoted in an arc of 180.degree. around a perpendicular axis there in a base. A safety lock is associated with the ring base for permitting separation of the molds for a molding operation and to automatically assume a locked configuration upon lifting. The split-mold lock is capable of being utilized on multiple parting lines of a plurality of mold parts.

Abstract: A press to be used in the synthesis of diamonds, the press has a cavity which receives a movable press member, with both the cavity and press having co-operating inclined surfaces which co-operate to define enclosed cavities to receive a base material from which diamonds are manufactured.

Abstract: The apparatus consists of a vessel that is transparent to microwaves, an inner coating of material that is heated by microwaves and a coating inside that that will reflect microwaves.In use the user allows his mold substance to set in the ordinary way. When he desires to release his moldable from the molded substance he applies microwaves to the outside of the vessel. The waves pass through the outer transparent wall and heat the inner coating. Conductivity of heat causes the surface of the molded object to be heated, to liquefy and release from the mold. The innermost layer of reflective substance prevents the microwaves from penetrating into the molded object and heating the whole molded object.What is new is an apparatus that will permit the user to quickly and conveniently release a molded object from a mold without any risk that he will heat and destroy portions of the molded object.

Abstract: A mould for the manufacture of thermally insulating semi-elbows for pipes comprises mating male and female mould parts definng therebetween an annular mould chamber extending for 360.degree. about a central axis, the mould parts being provided with holes or apertures for blowing overheated air into the mould chamber to produce a moulded shaped product from a mixture of mineral fibres and a polymerizable resin when placed in the mould chamber.

Abstract: A press system that provides rapid advance of one platen on a movable crosshead through the use of programmed hydraulic controls and is specifically adapted for use with sheet molding compound (SMC) presses. Rapid locking or latching of the crosshead and the platen it carries is achieved through the use of hydraulically operated clamping and release cylinders. The lower platen is supported on hydrostatic bearings permitting the platen to move and at the same time parallelism of the mold halves is maintained by swiveling molding power cylinders. Separate push-back cylinders are used to separate the mold through a short load path so that when the mold "breaks away" there is very little springback to minimize any part breakage during mold stripping.The lower platen also includes a mounting arrangement that provides the advantages of a rolling bolster or lower platen with a minimum of mounting structure.

Abstract: In a die, punch and core rod assembly for a powder compacting press wherein the core rod or rods remain stationary while the punch or punches are reciprocable relative to the die, the invention provides individual longitudinal position adjustment for the core rods by clamping the end of the core rods in a collet-like threaded member such as a slotted set screw threading in a threaded bore in a core rod support member. The core rod support member is preferably in the form of a pair of plates one bolted below the other. The end of each core rod is immobilized in its adjusted position by being disposed in an axial bore in the collet-like threaded member and by being clamped between the sidewalls of a longitudinal slot extending part of the length of the set screw, as a result of the tendency of the slot to close when the set screw is driven through the lower plate with its tapered end engaged with a tapered surface at the end of an aligned bore in the upper plate.

Abstract: A hand-operated thermal press for installing metal inserts in a workpiece of a thermoplastics material comprises a frame (12) including an upright post (16) on which is slidably mounted a support bracket (24) carrying an insert driver (18). Movement of the bracket (24) along the post (16) is limited by adjustable clamps (20, 22) and the bracket (24) is biassed into a starting position by a coil spring (28). A hand-operable mechanism (34) is provided for moving the insert driver (18) along the post (16). The insert driver (18) incorporates a heating unit movable relatively to the insert driver (18) against a biassing spring (100). The heating unit includes a core (70) heated by the unit and which supports a bit (92) adapted to receive the metal insert to be installed. The clamps (20, 22) are adjusted to provide a required movement of the insert driver and the spring bias (100) ensures a consistent driving force for installing the insert.

Abstract: The present invention discloses portable apparatus for heating and molding flexible elastomeric handrails having internal core conforming to the internal surface of the handrail and a flexible sheet which can be fitted over the handrail and conforming to the external surface. The device has electrical heating elements which raise the temperature to the necessary vulcanizing or molding temperature.

Abstract: A tire curing press (20) according to the concepts of the present invention includes a fixed base (12), a base beam (20) mounted on the fixed base, a lower mold section (L) for a tire supported by the base beam, a cross beam (25) supportingly mounting an upper mold (U), a beam lifting device (40) for effecting relative movement between the base beam and the cross beam, a connecting rod assembly (30) for aligning the upper mold section and the lower mold section, bolster assemblies (68, 80) positioned between the beams and the mold sections, and loading elements (75, 85) interposed between the beams and the bolsters for applying mold section squeeze forces at selected locations on the bolsters producing substantially uniform loading on the mold sections. The tire curing press may have in lieu of or in addition to the loading elements strain rod locking assemblies (100) selectively locking the strain rod (31) of each connecting rod assembly during the application of squeeze forces to the mold sections.

Abstract: A tire press and loader includes a tire chuck supporting, horizontal elevator frame which is vertically movable and maintained horizontal under normal operating conditions by drives connected to respective opposite ends of the frame. The loader also includes a safety device operative to cause canting of the frame from such horizontal position upon failure of one of the drives and a control responsive to such canting to render the loader drives inoperative and further to interrupt automatic operation of the press until the fault causing such failure is corrected. The safety device includes holding devices at opposite ends of the horizontal frame which yield to downward driving movement of such ends by respective drives. The holding devices are characterized by flexible elements trained over sprockets connected by slip clutches to a common safety shaft which may rotate in only one direction corresponding to upward movement of the horizontal frame by reason of a one-way clutch or the like.

Abstract: A tire loader for supplying a green tire into a vulcanizing press, comprising a plurality guide tracks extending radially outwardly, a plurality of grippers movably mounted on the guide tracks, respectively, for gripping a bead of the green tire in contact therewith, a plurality of fluid cylinders having rods connected respectively to the grippers and actuatable for moving the grippers along the guide tracks, and a stop for limiting the radially outward movement of the grippers along the guide tracks.

Abstract: Deep-drawing machine for manufacturing containers out of thermoplastic foil material having an arrangement for inserting into the hollow mold prior to the deep drawing step a banderole-shaped strip section. The machine includes support means for a roll of foil material, means for transporting the foil material, a heating arrangement as well as a forming arrangement and said forming arrangement consists of a stationary counter mold and the hollow mold movable perpendicular to the foil plane, which is pressed against a counter mold after the heating of the foil. After the container is formed by means of a pressure medium, the strip sections, which have been introduced into the hollow mold, are sealed onto the container. The arrangement for inserting the banderole-shaped strip sections into the hollow mold includes a winding mandrel which is stationary with respect to the axially movable hollow mold.

Abstract: For the purpose of pressurizing and holding the pressure in a pressurizing hydraulic cylinder is a hydraulic vulcanizing press, a pneumatic booster (more particularly, a pneumatically operated hydraulic pressure booster) for supplying a desired hydraulic pressure to the hydraulic cylinder is provided in a hydraulic circuit on a pressurizing actuation side of the pressurizing hydraulic cylinder. In addition, in the pneumatic input circuit for the pneumatic booster is provided a switching device for switching a pressurized air fed to the pneumatic booster between a high pressure air for boosting a hydraulic pressure to a desired hydraulic pressure and a low pressure air for holding the desired hydraulic pressure after the desired hydraulic pressure has been attained.

Abstract: An apparatus for loading or unloading tires for a tire vulcanizing machine is disclosed which essentially comprises a pair of vertically extending guide rods fixedly secured to a housing of the tire vulcanizing machine, a common board slidably fitted onto said guide rods so as to be displaced in the vertical direction with the aid of driving means, a pair of booms adapted to be displaced in the vertical direction together with said common board, each of said booms being turnable about the guide rod, tire grasping means including a plurality of grasping pawls at the one end of each of the booms, and means for limiting the extent of turning movement of the boom.

Abstract: A device for exchanging dies for a machine using dies is disclosed, wherein a pair of carriage cars are adapted to be movable in front of a die mounting space between a stationary plate and a movable plate of the machine to which the dies are clamped, transfer means for exchanging the dies between the die mounting space and the carriage car are provided, a main unit of a push-pull device is provided in front of the carriage car independently thereof so that the dies can be changed by this push-pull device between the carriage car and the die mounting space.