Abstract: The present invention relates to a mould for making articles of expanded plastics material and to a machine adapted to receive such a mould. The mould according to the invention comprises a finned body whose central bore constitutes a cavity. The latter is closed in its lower part by a plunger while the top of this mould comprises a support provided with a guide in which a slide element moves longitudinally. The latter comprises a perforation intended for the injection of matter into the cavity, and a hole for ejection of the moulded piece after translation of the slide element.

Abstract: An upright injection-compression pressing machine for the manufacture of information carrier discs, such as photograph records and video discs, has a mold clamper assembly including a pair of stamper bearing molds movable relative to each other in a vertical direction towards and away from each other, and an injector assembly mounted on the clamper assembly in alignment with the direction of the relative movement of the molds.

Abstract: A system and a method of multicavity injection molding of a product, where the gate cannot be placed, as traditionally, at the top of the product, but must be placed at the side of the product; this is accomplished by using inclined secondary runners; the process is exceedingly fast since the secondary runners are not heated in their basic form; disclosed is also the method and means for employing polystyrene as the injection molding material.

Abstract: A shut-off nozzle for injecting molten resin into a mould cavity comprises a cylinder to be connected to a moulding machine, a nozzle head attached to the front end of the cylinder to be connected to a mould, a flow path for molten resin through the cylinder and the nozzle head, a torpedo disposed in the flow path, and a shut-off pin protruding from the front end of the torpedo. The torpedo is of a streamline shape and is divided into a front portion having a hole and a rear portion having a cavity. A spring is disposed in the cavity applying forward force onto the shut-off pin. The cross sectional area of the shut-off pin to accept pressure of molten resin and the force of the spring are adjusted so that the shut-off pin is in the front position until the pressure of molten resin becomes a predetermined value.

Abstract: An apparatus for modifying the between the ribs space in a thermal plastic battery container is disclosed. The apparatus comprises a heated non-circular wiping member which when rotated about a fixed centerline defines a first circumference having a diameter substantially equal in length to the minimum between the ribs space and a second concentric circumference having a diameter greater in length than the first diameter.

Abstract: A transfer molding machine for filling at least one cavity of a mold with a resin by means of a plunger including a resin pressure sensor for sensing the resin pressure in the mold, and a control device for controlling the pressure applied to the plunger to drive same in such a manner that an arbitrarily selected primary pressure higher than a holding pressure is applied to the plunger to drive same until the pressure of the resin charged into the mold which pressure is detected by the resin pressure sensor in the mold reaches a predetermined pressure level and a secondary pressure corresponding to the holding pressure is applied to the plunger to drive same after the predetermined pressure level has been exceeded by the pressure of the resin being charged into the mold sensed by the resin pressure sensor in the mold, and a warning device that issues a warning when the pressure applied to the plunger to drive has exceeded a predetermined pressure.

Abstract: Screw feeder and ram injector units for injection molding presses are disclosed. The feeder and injector units incorporate several novel features including power extension and retraction of the feeder unit by the drive ram of the injector unit. The screw feeder unit is supported directly on the ram unit without the necessity of separate supports on the press frame. A ram drive piston and injector plunger are laterally supported by means supporting the drive assembly on the injector assembly. Temperature control of molding compound is afforded by fluid circulation in a block carried on the inlet area of the screw feeder and a jacketed outlet nozzle on the ram injector.

Abstract: A molding machine for die casting, injection molding, and other similar processes, comprises a base shaped to support thereon a two-part die, and a ram for converging and diverging the die halves between open and closed positions. A pair of clamping frames are pivotally mounted on one end of the base, and include a closed border shaped to surround or receive therein side portions of the die halves. The clamping frames are laterally pivoted between a fanned-apart or open position wherein the die can be freely lifted off of the base, and a folded or closed position wherein the frame borders surround the die side portions and capture the same between the ends of the frames. In the closed position, retractable compression columns extend between the die and one end of the frames to positively lock the die halves in the closed position, whereby die separation forces developed during injection of the die are resisted substantially solely by the clamping frames.

Abstract: A hot runner system for use in combination with plastics molding tools for injection molding of plastics material with injection from several sprues comprises a central inlet member, heated runners for distributing from the central inlet member plastics material to a number of sprue bushes in which heating cartridges are inserted. The sprue bushes are fixed by securing means to a platen and form, together with said platen and said inlet member, a stationary and mechanically rigid assembly wherein contact between hot parts of the sprue bushes and the platen occurs only in rotationally symmetrical contact surfaces. The heated runners are individually movable relative to said assembly, but such movements will not affect the positions of the sprue bushes or the central inlet.

Abstract: A method of controlled ejection of a molded product in relation to orientation, speed of ejection and/or sterility is disclosed. The method is not dependent on auxiliary moving parts or vulnerable pins or blades. The molded product is ejected into a substantially enclosed guide conduit where the contours of the conduit substantially are regions of the parting surface and the cavity/ies. The guide conduit may be fairly holeproof, whereby a very fast ejection may be accomplished when the molded product is transported in an air stream in a manner similar to a pneumatic dispatch, not necessarily in a downward direction. The molded product may be kept sterile while it is transported in a stream of sterile air.

Abstract: There is disclosed the distribution of an amorphous refractory in a case where a lining frame is positioned within a molten metal vessel preliminarily lined with a permanent lining refractory and the amorphous refractory is cast into the space between the permanent lining refractory and the lining frame thereby applying a lining to the inner surface of the vessel.A conical distributor is arranged above the lining frame and the amorphous refractory is continuously delivered from a rotary chute onto the distributor so as to describe a concentric path of moving falling points.

Abstract: An injection molding machine assembly for use with an operating injection machine comprises a tool unit mounting support adjacent the injection machine, a plasticizer and ejection unit mounting support adjacent the mounting support for the tool unit. Each support has associated with it a coupling element for connecting the associated tool unit or plasticizer and ejector into an operative condition or into a standby heating condition, for example. In addition there is a magazine which has at least one additional support for either or both of a tool unit and an ejection and plasticizing unit. An ejector and plasticizer is advantageously provided on a mounting support as well as in a magazine support. In addition a tool unit is provided on the mounting support or in the magazine support.

Abstract: A method and apparatus (10) is disclosed which provides automatic control of the temperature of a fluid cooled plastic mold (12) during successive injections of liquid plastic into the mold. The temperature of the mold (12) is sensed by a probe (18) which provides a signal indicative of the temperature of the mold. The signal from the probe (12) is compared by the apparatus with a selected control temperature signal indicative of the proper operating temperature of the mold. When the sensed temperature is above the control temperature, a solenoid operated control valve (50) is activated so that cooling fluid, such as ordinary tap water, is passed through cooling channels (13) in the mold. Flow of cooling fluid is shut off when the sensed temperature drops below the selected operating temperature.

Abstract: Process and device for injection molding plastics. The injection material charge is introduced into the mold to obtain an uninterrupted flow front by initially injecting the material into the mold through at least one first gate and through a subsequent gate or gates only after the flow front passes the subsequent gate(s). An injection molding device having separately and variously controllable valves located in the supply lines interconnecting an injection molding apparatus, mold and gates.

Abstract: A method is disclosed for forming an integrated truss structure by means of a mold structure wherein the mold includes a plurality of male mold members each having a plurality of open grooves formed therein which slope away from the top surface thereof. A plurality of female mold members each have a generally circular recessed cavity with a plurality of open grooves which are orthogonally disposed with regard to one another and which slope away from the plane of the recessed cavity. The male and female members are positioned opposite one another with the grooves in the male and female members being aligned to define strut beam chambers and wherein the top of the male member is aligned with the recessed cavity of the female member to define a junction chamber. Thus, the strut beam chambers slope away from the junction chamber.

Abstract: A method of automatically controlling the length of a row of articles to be injection-molded on a multi-cavity mold having an elongate runner and a plurality of successive cavities spaced equidistantly along the runner, comprising the steps of: detecting an initial position of a control rod inserted in the runner; registering both the direction and the extent to which the control rod is to be moved for longitudinal adjustment with respect to the runner, depending on the initial position of the control rod and a preselected length of the article row to be molded; moving the control rod longitudinally of the runner in the registered direction; detecting the movement of the control rod to the registered extent; and in response to the last-named detecting, terminating the movement of the control rod. An apparatus for carrying out this method is also disclosed.

Abstract: A improved apparatus for molding pipes is dislosed. A hood of convex shape having an outer surface corresponding to the shape of the interior of the pipe and has an annular rim on the widest part thereof and a molding shank rigidly attached to the narrowest part of the hood. A flat annular washer is support on the rim and being separable therefrom to provide a flat terminal end for the molded pipe.

Abstract: A multilayered preform is disclosed for making an open mouth container. The preform has a container-forming portion comprising a circular central area for making the bottom of the container, an annular sidewall-forming portion for the container surrounding add integral with the outer periphery of the central area, a flange connected to the annular portion, said flange having the contour of the rim of the container, said container-forming portion having a predetermined volume to meet dimensional requirements, and a retaining member having an enlarged portion. The preform is an improved structure that is readily adaptable for making containers from the so-called solid state pressure forming process.

Abstract: An ice tray including an upper and lower section locked together so to form completely enclosed chambers therebetween in which enclosed water freezes into a fully desired shape of ice cube.

Abstract: A ceramic molding machine is used for hot molding ceramic parts under low pressures for small part production molding and includes a heated tank that is generally conical in shape and has an internal mixer that is driven from the exterior of the tank through a slip clutch arrangement to avoid overloading of the drive motor. The conical tank insures that the ceramic slurry will flow toward the bottom outlet from the tank and also permit use of small amounts of slurry for small runs of parts if the material is expensive. The mixer blade or paddle is driven from the bottom and removable from the top and thus the tank can easily be serviced. Additionally, air pressure is utilized for holding the molds in position over the feeder pipe and also for transferring the slurry to the mold in a timed sequence that can be controlled to provide the desired time for filling of the mold.