Abstract: A press for vulcanizing annular elements, in particular belts for motion transmission is provided. The press can be used to vulcanize belts having different dimensions and shapes. A device for varying the distance between the pulleys on which the belts are mounted for the vulcanization is separated from the vulcanizing device and provides for variation of the distance between the pulleys for loading and discharging the belts.

Abstract: A tablet making machine includes a rotor, one end, preferably the lower end, of which is detachably secured to a rotatable member of the machine so that the rotor rotates with the rotatable member in use of the machine; the configuration of the rotor being such that when it is detached from the rotatable member the rotor can be removed from the machine by generally horizontal sliding movement. The rotor may thus be easily and quickly removed from the machine by detaching the rotor from the rotatable member and sliding the rotor horizontally from the machine, thus significantly reducing the time taken to clean the machine between batches of tablets may be reduced and enabling ready replacement of punches and/or dies that are damaged or worn. Further, an alternative rotor with different punches can be substituted very quickly. In this way, machine downtime may be significantly reduced.

Abstract: A unitary punch and die assembly for tooling a powder material compacting apparatus, or press, the assembly comprising a die plate mounted in the press table, which removably holds a die bushing clamped in position by a retainer collet provided with a peripheral thread and an internal thread. The retainer collet has an internal shoulder engaging a shoulder at the base of the die bushing, and a clamping ring threads on the internal thread of the collet for holding the die bushing in position within the collet. The peripheral thread of the collet engages the corresponding internal thread of a die spacer on which the die plate is mounted. By means of the retainer collet and the clamping ring, the die bushing surface may be adjusted flush with the surface of the die plate, without requiring grinding or lapping of the die bushing after assembly of the die bushing in the die plate.

Abstract: A multiple press having a plurality of molds for forming ceramic moldings. The press includes a base frame on which a movable mounting plate is mounted. The movable mounting plate carries a plurality of mold halves. The base frame also includes a fixed mounting plate having a plurality of cylindrical bores in which a plurality of punch carriers are slidably mounted. Each punch carrier holds a mold half which mates with the confronting mold half on the movable mounting plate. The cylindrical bores being in communication with a source of a pressure medium so that a "pressure pad" is formed behind each punch carrier during the molding process.

Abstract: The invention provides an apparatus for forming moulded articles such as removable insoles for shoes. A blank is placed between a rigid plate corresponding to the peripheral base contour of the finished article on one side thereof and a mould bed corresponding to the shape of the article on the other side thereof. Peripheral areas of the blank are exposed by the plate and a flexible diaphragm is applied over the plate under pressure or with the aid of a vacuum after heating the blank to the softening point, to define said peripheral base contour, and to conform the other side and the exposed areas of the blank to the shape of the mould bed. In the case of shoe insoles, a range of sizes can be made with the same mould bed, using only different sizes of plate.

Abstract: A discrete thermoplastic composition is formed into a shaped article in a rapid stamping process. The composition is placed on and preheated with a rigid metal plate which has been preshaped to fit the contour of one of the dies of the stamping press. The heated composition and metal plate are then transferred to the stamping press where the composition is stamped and cooled into a three-dimensional shaped object. The surface of the metal plate contacting the composition has a special finish so that desired surface effects can be produced on the stamped article.

Abstract: Three-dimensional work pieces, such as instrument panels or dashboards, are made of initially flat stock or of synthetic material such as a two-component foamable material. The tools of the present apparatus include upper and lower holding tools which are preferably simultaneously shaping tools, and cutting or trimming tools. The upper tools and the cutting or trimming tools may have a common support which is preferably exchangeably secured in a main frame. The shaping tools are moved into a first cooperating position relative to each other, whereby the work piece is formed into the desired shape. The shaping tools may then be locked in the shaping position or they may be moved into a second cooperating position to be rigidly locked in the second position. A tool support such as a table carried by a scissors lift frame is used for moving the shaping tools into the desired positions. The cutting or trimming is then performed by applying pressure to the respective tools.

Abstract: A holding device for surface sheets or surface plates in a press intended, for example for pressing wood fiber products, include a press plate, a vacuum source for supplying vacuum to the side of a surface sheet or surface plate which faces toward the press plate, a vacuum distributing body placed between the press plate and the surface sheet, and a seal which is arranged to provide sealing between the present plate and the surface sheet. A substantially air-impervious sheet is disposed between the press plate and the surface sheet to form two essentially closed spaces coupled in air communication with the vacuum. This arrangement permits independent removal of the surface sheets from the press plates.

Abstract: There are disclosed an apparatus and a method for continuously embossing synthetic plastic sheet material with precisely formed embossments in patterns repeating along the length thereof. The apparatus includes a movable polished belt upon which the sheet material is carried, and a series of molds are placed on the sheet material. As the sheet material and molds are advanced in steps through the apparatus, presses clamp the molds and belt against opposite surfaces of the sheet material and raise the temperature of the assembly to embossing temperature for the resin to cause the resin to flow into the mold cavities, and volatiles at the interface are dissolved in the resin. After the embossing step, the clamping pressure is released and this permits limited shrinkage of the mold and sheet material.

Abstract: A cylindrical die for a pellet mill for animal feedstuffs is releasably clamped to a rotatable die holder by means of a series of clamping segments disposed in a recess at the end face of the die holder. The recess has a radially outer conically diverging surface which cooperates with conically shaped outer surfaces on the segments to produce clamping of the radially inner faces of the segments on an end portion of the die.The clamping segments are urged into engagement by springs acting on rods connected to the segments and are disengagable by means of a series of hydraulic rams which can be actuated to oppose the force of the springs. The direction of the forces is chosen to be at an angle to the axis of the die holder so as to cause the clamping segments to follow the surface of the recess and to move radially away from the die during disengagement. The angle chosen is preferably the angle of divergence of the recess. In a modification centering segments are interdigitated with the clamping segments.

Abstract: A press is provided of the type used in compressing refractory material at high pressures in the manufacture of bricks and the like. The press includes a bed, columns supported by the bed, and a mold table slidably supported on the columns, the mold table including a central aperture housing a removable mold. The press further includes at least one plunger extending upwardly into the mold cavity of the mold. The press also includes a pallet for supporting the plunger, the pallet being releasably attached by alignment pins to the press bed and being supported for slidable movement on the upper surface of the press bed by a plurality of inflatable air bags located between the upper surface of the press bed and the pallet, the air bags each including at least one aperture in the bottom wall of the air bag. Air can be forced into the air bags to cause inflation of the air bags and can escape through the aperture in the bottom wall to form a fluid cushion between the pallet and the upper surface of the press bed.

Abstract: A method and machine for producing a configurated and specified weight food product in die cavities of a rotary die roll, each of the die cavities being defined by a configurated side wall and a porous bottom wall. During each revolution of the roll a batch of the product is forced into each cavity as the cavities pass beneath a hopper. Upon continued rotation of the roll, the bottom walls of the cavities are moved outwardly so as to force the configurated products from the die cavities. Tempered air at a controlled temperature and at a pressure above that of the atmosphere is directed through the porous bottom walls while the bottom wall is extended so that the configurated product is forced off of the wall and onto a conveyor located beneath the die roll. To facilitate cleaning of the porous dies, the die roll is so constructed that hot water may be directed through the air flow passage during cleaning and the porous bottom wall dies of the drum may be easily removed from the drum without drum disassembly.

Abstract: Improvement of a press for powder metallurgy having one or more rotatably arms mounting horizontally and respectively on an axis which is set up vertically at suitable portion of front and or rear walls of housing of the press. The arm has a box for supporting a die set and a metal mold on an end. The die set and the metal mold being supported in the box are easily transferred to a receiving portion thereof of an entrance of the press by rotation of the arm to horizontal direction, and the transferred die set and the metal mold are installed in accurate portion of the press by hand or a driven power means.

Abstract: A punch press remotely disengageable from the punch drive mechanism, particularly useful where the press must operate in a hostile environment. The press includes a punch block, supporting one or more punches, which is laterally inserted into connection with the punch drive apparatus. A die set is provided for supporting one or more dies, and the die set is associated with the punch block such that the punch is guided into a preselected position relative to the die by the drive apparatus. A structural frame is provided for seating the die set, which can be laterally inserted and removed from the frame. Guide rails are also provided which can extend laterally from the frame and support the die set in a position removed from the normal operating position within the frame. The guide rails also support the die set in the operating position.

Abstract: A tool carrier mechanism for injection molding machines for securing a tool part to a tool carrier, comprises a guide bolt having means for connecting it to the tool part so that it projects outwardly from the rear of the tool part. A tool carrier has a bore therethrough for receiving the guide bolt and has a front face against which the rear of the tool part is engageable and has an opposite rear face beyond which said guide bolt projects. A slide mounted on the tool carrier adjacent the rear face of the tool carrier is movable toward and away from the guide bolt for engagement and disengagement therefrom. Wedge surfaces are defined between the guide bolt and said slide effecting an inward movement of the guide bolt with the tool part to exert an inward pressure engagement of the tool part with the tool carrier.

Abstract: A table for use in plastic forming machines, the table including a plurality of upstanding tubular support members arranged in a predetermined pattern, a plurality of alternately usable platform members, each such platform member being of a different size to support different vacuum molds and each being mountable on upstanding tubular supports at selected positions on the table. A plastic material clamping frame having readily adjustable side elements for varying the size of the clamping frame is arranged to be selectively positionable, at all variable sizes thereof, to thereby hold the edges of a sheet of plastic material along and beneath the edges of different vacuum forming molds mounted on a platform member supported by the tubular support members at the selected positions thereof.

Abstract: An isostatic press comprises a pressure vessel defined by a tubular jacket and by two end plugs. The jacket is, in the direction of its longitudinal axis, displaceble between two positions. The jacket surrounds a third plug centrally located between the two positions of the jacket so that, when the jacket is in one of its end positions, the central plug closes one end of the jacket, and vice versa. The two jacket positions alternatingly serve as pressing and charging positions so as to permit recharging of the press at one position simultaneously with carrying out a pressing operation at the other position. This arrangement approximately doubles the productivity of the press.

Abstract: A unitary punch and die assembly for tooling a powder material compacting apparatus, or press, the assembly comprising a die plate mounted in the press table, which removably holds a die bushing clamped in position by a threaded retainer provided with a peripheral thread of the buttress type, and a punch removably supported in a punch holder plate actuatable along guideposts supported by the die plate. A second plate slidably mounted in the guideposts and reciprocated by the press ram is rigidly interconnected with the punch support plate for reciprocation thereof. For compacting articles such as toroidal articles, cylinders, and the like, a core rod supported by an appropriate support plate adjustably fastened on the guide posts projects through a longitudinal bore provided in the punch and punch support plate.

Abstract: This invention concerns an apparatus for embossing a plastic workpiece using vibratory energy. A workpiece to be embossed is brought into forced engagement with indicia carried by an embossing ring which is disposed at or in proximity to the antinodal region of longitudinal motion of a resonator. The resonator is caused to vibrate at its natural frequency of oscillation in a direction substantially parallel to the workpiece surface. After embossing the workpiece is removed from contact with the resonator.

Abstract: A mixture of fibrous material and a thermosetting binder is pressed in unheated state at a working station to convert it into a semi-finished body having approximately the shape and size of the desired shaped article, and thereupon the semi-finished body is pressed at the same working station but under application of heat, in order to convert it into the desired shaped article while setting the thermosetting binder.