Abstract: A cavity insert for the injection side and a core insert for the ejection side of a mold are each shaped as a generally cylindrical, stepped body provided with circumferentially extending locking grooves and a liquid cooling or heating channel. Insert retainers and lifters having rotatable elements with locking tongues engaging the locking grooves clamp the inserts in the main mold frame. The main mold frame is provided with liquid conduits opening to opposite ends of the liquid channels so that the need for machining liquid conduits and channels for different inserts is avoided. Ejector tooling may be connected to the core insert for insertion and removal with it. The rotatable elements also have shoulders engageable with the inserts and may be axially moved to lift the inserts partly out of the mold frame to enable rapid changeover from one insert to another. Sliding wedges are used to releasably secure the ejector tooling to the master mold ejector plates.

Abstract: A ring tread (12) or a continuous tread (16) may be injection molded in a generally cylindrical segmental mold (20) having a core (42) and radially movable segments (46) forming a mold cavity (54). A container ring (60) is movable into engagement with the segments (46) during closing of the segmental mold (20) to retain the segments (46) during closing of the segmental mold (20) to retain the segments (46) in position during injection and curing. The container ring (60) may have an opening for a continuous tread section to extend from the mold cavity (54) through the side of the container ring (60) and through a space between two of the segments (46). Roller supports on the core (42) support the continuous tread (16) when the segmental mold (20) is opened and sections of the continuous tread (16) are shifted circumferentially through the mold cavity (54).

Abstract: Apparatus for molding a thermoplastic tubular product such as a bushing having an internally threaded major diameter portion and an integral truncated minor diameter portion. A mold provided with a mold shell which jointly with a two-part mold core defines a mold cavity having a shape complementary to the shape of the molded bushing. The molded bushing has an internal undercut in the form of a thread in the major diameter portion thereof. The mold core is made as a core pin and an externally threaded sleeve of greater diameter than the core pin circumferentially of a portion of the core pin. Provision is made for moving the mold elements relatively to define the mold cavity and to effectively release the core by axial compression of the molded product while exposed on the mold core to cause it to swell radially outwardly and release the externally threaded core which forms the internal thread on the molded bushing.

Abstract: A tire tread (74,76,194) is injection molded by increments in a mold cavity (56,58,119,224,262) having an open end (110,272) closed by a trailing end (116) of a cured section (114,228). A temperature moderating closed end (109,207,268) prevents complete curing of a trailing portion (116) of the cured section (114,228) while the rest of the section is cured. The mold (14,16,90,188,236) is opened so that the cured section (114,228) may be shifted to a position where the trailing portion (116) is clamped in the open end (110,272) of the mold cavity (56,58,119,224,262). A second section (118,228,264) is injection molded in the cavity (56,58,119,224,262) and the partially cured trailing portion (126) of the cured section (114,228,264) is cured and adhered to the leading portion (130) of the second section (114,228,264) as the second section is cured. This process may then be repeated for later sections to provide a desired length of cured tire tread stock (74,194,264).

Abstract: The present invention relates to apparatus form making a vial and cap. A mold for forming the vial and cap and means for seating the cap on the vial prior to ejecting the vial from the mold is provided and includes a frame for the mold, a first mold half arranged on the frame, and a second mold half movably arranged relative to the first mold half so as to form a mold cavity therebetween. The mold produces a vial and cap including smooth radii provided at several locations to facilitate the seating of the cap on the vial.

Abstract: A mold comprises a molding chamber, a sprue aperture communicating with the chamber for introducing molding compound into the chamber, and a mold gate for regulating molding compound flow through the sprue aperture. In accordance with this invention, the mold gate comprises flexible flap means positioned to restrict flow of molding compound through the sprue aperture. The flap means is positioned to be flexed toward the molding chamber by pressurized molding compound, to permit increased flow of the molding compound through the sprue aperture into the molding chamber. The flap means is capable of returning to their original shape when the pressurized molding compound is substantially released of its pressure, particularly in the circumstance where a suction step in the molding compound pressure cycle provides a negative pressure. The flap means in its original shape at least substantially obstructs the sprue aperture.

Abstract: A mold for forming a plastic cap and a method of removing a cap from such a mold. The mold includes female and male members which, together, form a mold cavity in which the cap is formed. The female member includes an upper assembly and a plurality of cams. The cams have radial protrusions engaging the male member to form annular recesses in the cap. The cap is removed from the mold by moving the upper assembly of the female member axially and the cams thereof radially away from the cap, and then removing the cap itself from the male member of the mold. Preferably the cap is shrunk onto the male member to develop a space between the cap and the female member of the mold prior to moving the female member away from the cap.

Abstract: A baffle for partitioning fluid circulating passages that are provided in a structure for heat transfer purposes. The baffles are inserted without the need for extra drilling and tapping of the structure, and include an elongated, substantially flat body which is inserted into a passage to thereby partition the passage into two conduits, which act as supply and return conduits for fluid flow. The baffle further extends into another passage, through which fluid flows, to thereby block the flow of fluid and force the fluid to flow through the partitioned passage via the defined conduits. The baffle is held into position by resilient arms which project outwardly from the baffle and are received fully within the non-partitioned passage.

Abstract: For manufacturing articles of plastics, rubber or any other material a mold or die assembly comprising a mold or die base assembled from repetitive modular standard elements consisting of substantially "ready to use" interchangeable base plates is provided by the invention.The base plates are prefabricated by high-precision castings or galvanoplastics or any other similar high-precisious non-cutting method of manufacture.At least two of such base plates are, as mold or die plates, provided with a pre-determined number and arrangement of finished to sized, prefabricated cylindrical bores or piercings of any non-circular, mainly polygonal cross-section. Each of said bores or piercings is capable of fittingly receiving an interchangeable mold or die insert carrying the individually designed (negative) mold or die cavity surface for forming the particular article(s) to be manufactured.

Abstract: A coupling device of the insertion or plug-in type for connecting lines which conduct flowing media, preferably pressurized fluids, to the mold halves of a molding tool in an injection molding machine. The coupling device includes a first coupling member, for example, a coupling nipple, mounted on an adapter plate of the injection molding machine and a second coupling member, for example, a coupling sleeve, mounted on a mold half of the molding tool. A locking device is used for fixing the two coupling members in an engaged position. The locking device is biased into its locking position by means of a spring and can be moved against the biasing force by means of an electromagnet from the locking position into a releasing position.

Abstract: Apparatus for making a molded plastic snap-fastener in-situ on a porous substrate, such as fabric. The apparatus includes dies defining a mold cavity therebetween and an ultrasonic head for melting and shaping plastic in the mold cavity. A hinged stripper surrounds a die and when actuated engages the fabric to remove the molded fastener from the die cavity.

Abstract: There is provided an injection molding machine for the manufacture of plastic parts from thermoplastic, thermoset and/or elastomer material by injection molding or reaction injection molding. The machine includes a multi-station locking unit of horizontal or vertical configuration designed to hold a number of molds and an injection unit associated therewith for the simultaneous injection of the molds. The machine also includes two outer mold clamping plates, one of which is mounted on guide elements and movable thereon in the locking direction and a center mold-receiving part movably mounted on guide elements between the two mold clamping plates and having a heatable melt conduction system with sprue nozzles and one half of a mold attached to each of its sides.

Abstract: Improved apparatus for plastic molding devices and more particularly for an improved injection plastic molding machine which uses mold inserts carried by pockets in the machinery where a first platen is provided having a first platen pocket to receive a first mold half to be located in communication with a source of plastic material for example thermoplastic material, a second platen having a second platen pocket adapted to receive a second mold half so that the second mold half can be moved to abutting relation with the first mold half to form a cavity defined by the first and second mold halves into which molten plastic material is injected. A source of cooling fluid can be provided through the first and second platen to the first and second mold halves utilizing seal devices between the first and second platens and the first and second mold halves respectively.

Abstract: An injection molding apparatus is used to line flanged pipe elbows. The pipe elbow is clamped by the flanges to two pivotted platens, one of which has a curved mandrel to shape the inside of the elbow lining.

Abstract: An injection mold for molding a tubular article having a closed end comprises a stationary mold half including a cavity plate having at least one cavity impression and a movable mold half which is movable between a closed position and an open position and is provided with at least one core portion for defining a cavity together with the cavity impression when the movable mold half is moved to the closed position. A recess is formed in the top face of the core portion and a telescopic mold piece is fitted into the recess in such a manner that a narrow space is formed therebetween. An air chamber having a relatively large volume is formed in the vicinity of the top face of the core portion. The air chamber is communicated with the space over the top face of the core portion by way of the narrow space between the mold piece and the recess, and with the atmosphere by way of a communicating passage formed in the core portion.

Abstract: This invention relates to an improved manifold system for a multi-cavity injection molding system. The manifold system has one elongated bridging manifold which extends transversely across a number of spaced elongated support manifolds. Each of the support manifolds, in turn, extend across a number of heated probes or nozzles, each of which leads to a gate to a cavity. The bridging manifold has a portion of the hot runner passage extending through it from a single inlet to receive melt from the molding machine to a number of spaced outlets. Each of the support manifolds also has an inlet which is in alignment with one of the outlets from the bridging manifold and a number of spaced outlets. Each of the outlets of the support manifolds is in alignment with an inlet to one of the probes or nozzles. Each of the manifold has two way junctions at which a larger diameter portion of the hot runner passage joins two smaller diameter downstream portions.

Abstract: An injection molding apparatus for the manufacture of plastic parts from thermoplastic, duroplastic and/or elastomer material by injection molding or reaction injection molding is provided. The apparatus has a multi-station locking unit of horizontal or vertical design adapted to receive a plurality of molds, an injection unit associated therewith for the simultaneous injection of the molds, two outer mold-clamping plates one of which is movably arranged on guide elements for moving in the locking direction, and a centrally disposed mold-receiving part movably arranged on guide elements between the two mold-clamping plates. The mold-receiving part is provided with a heatable melt-guiding system with sprue nozzles and has fastened to each of its two sides one half of a mold. The centrally disposed mold-receiving part is a mold-clamping plate divided crosswise relative to the locking direction, wherein the two parts are kept together by a high-speed clamping device.

Abstract: A gum candy made from a basic sugar-gelatin mass is produced by either preparing the basic mass, if required with the addition of additives, in an injection molding machine and injecting (molding) it immediately subsequent to preparation or preparing the basic mass in conventional boiling apparatuses and molding it with the aid of an injection molding machine, in both cases with the final water content.

Abstract: A mold assembly for producing a container having a closed bottom is disclosed. Inner and outer core members are closely spaced together to provide a cavity for forming a container having a wall thickness on the order of 0.015 inch. The cavity is formed with a plurality of radial flow channels which produce corresponding ribs on the container bottom. The radial channels extend from an axial injection port outwardly to the wall portion of the cavity, where a thickened transition region joins the bottom of the container to the side wall portion thereof. A plurality of vertical flow channels are formed by means of milled flat portions on the surface of the inner core along the length of the side wall. The flow channels cause fluid plastic injected under high pressure to flow radially outwardly, around the bottom corner of the container, and down the vertical flow channels located intermediately of the ends of the ribs.

Abstract: A resin injection metal mold unit comprising, in combination, a metal mold consisting of a cavity section and a core section, and stationary and movable metal mold supporting members for releasably holding the metal mold sections in the opposing relationship. Each supporting member has a plurality of clamping members for engaging an associated mold section. Each clamping member has a clamping slant in the complementary relationship with the counter slant chamfer of the mold section. Such members are slidably attached to an associated supporting member so as to move close and apart from the mold section. When a mold section is fixed to an associated supporting member, the clamping members are brought in contact with the mold section with their clamping slants closely fitting the counter chamfer slants of the mold section, and then clamping members are fixed to the supporting member by driving associated bolts, thereby pushing and holding the mold section against the supporting member.

Abstract: An injection molding machine for plastics and any other similar materials. This invention molding machine is provided with a plasticization device for exclusive use which consecutively plasticizes material and feeds plasticized material to a plurality of injection devices in regular sequence. Each of the injection devices has its corresponding mold clamping device. By virtue of this construction, working efficiency of main sections of the machine is increased, resulting in a higher productivity of the entire injection molding machine.

Abstract: The present invention increases the shot capacity and the screw recovery time of an injection molding machine without increasing hydraulic pump capacity or motor horsepower. In accordance with one aspect of the invention, an existing injection molding machine is retrofitted with two cylinder and piston arrangements which are bolted onto the machine between its plasticizer barrel and its melt manifold. One of the cylinder and piston arrangements is employed to perform a mold-filling operation, whereas the other cylinder and piston arrangement is employed to perform packing and suck back operations.

Abstract: The apparatus includes a carrier plate cooperating with an injection molding machine and having at least two sets of cavities therein for cooling the hollow plastic articles, with the number of cavities corresponding to a multiple of at least two times the number of hollow plastic articles produced in an injection molding cycle. The apparatus also includes means for aligning one set at a time of said carrier plate cavities to juxtapose said set of cavities with the hollow plastic articles formed in an injection molding cycle, and means for transferring said hollow plastic articles to said juxtaposed cavities.

Abstract: A thermal gate for turning on or off the flow of molten molding material into a mold cavity comprises a narrow passage formed by an extremely thin-walled tube of iron-nickel alloy surrounded by a thin sleeve of insulation, this sub-assembly being inserted into a water-cooled mold. When the tube is supplied with electric current, it rapidly heats to a temperature above the melting point of the molding material, permitting such material to flow into the mold cavity. The thin insulating sleeve maintains a temperature gradient across its wall thickness to permit the tube to remain at the desired temperature without undue power input. When it is desired to stop flow of material through the passage, the current is shut off, and the low thermal inertia of the tube and sleeve permit the tube to rapidly transfer its heat to the water-cooled mold, thereby freezing the molding material in the passage.

Abstract: A mold closing unit for an injection molding machine has an exchangeable injection mold assembly; a mold exchanging device; a conditioning table situated adjacent a clamping space of the mold closing unit; and a supply line coupling for connecting to and disconnecting from, one another conduit terminals of mold-side supply conduits and machine-side supply conduits. The supply line coupling is formed of a mold-side coupling half fixedly attached to the mold body and a machine-side coupling half arranged to be movable between the conditioning table and the clamping space. The mold-side coupling half and the machine-side coupling half are joinable to and disconnectable from, one another along a horizontal parting plane of the supply line coupling for joining the machine-side and mold-side conduits to one another for preheating the injection mold assembly on the conditioning table.

Abstract: A stack mold having a pair of mold halves movable toward and away from another along an axis of movement and in which a plurality of mold plates are arranged parallel to one another between the mold halves and parallel to the axis of movement of the mold halves. This arrangement of the mold plates enables a larger number of large, thin parts to be simultaneously molded in a given size press than is possible in the prior art. Further, the mold plates are formed with hangers which support the mold plates on the mold halves, enabling different mold plates to be easily substituted without disassembling the mold structure and slides, and also eliminating the need for guide pins or pillars for the mold plates. The mold plates are supported on program plates having guide surfaces thereon for determining the opening and closing sequence of the mold plates during opening and closing movement of the mold press, and the central portion of the endmost mold plates is wedge-shaped.

Abstract: This invention relates to an injection molding process for synthetic resin and its apparatus which enables the production of highly precise molded articles and a shortening of the molding time. More particularly, by actuating a forcible cooling means mounted in a mold part constituting a gate, the synthetic resin fused by local heating of the gate is cooled and solidified forcibly, thereby closing the gate. On the other hand, by stopping the forcible cooling means, the solidified resin in the gate is heated and fused by a heater mounted either inwardly of a runner or outwardly thereof.

Abstract: An injection molding machine or system in which an auxiliary packing stage is provided between a plasticating stage and a molding stage. The packing stage comprises a tubular housing and a ram member disposed for sliding displacement therein by a drive unit. The ram member is reciprocated in the tubular housing to intermittently develop a packing chamber therein to allow an amount of the extruded material from the plasticating stage to be accepted temporarily in the chamber and to intermittently reduce the volume of the chamber to discharge the accepted amount of the melt under pressure into a mold cavity in the molding stage. A control unit acting on the drive unit establishes a predetermined stroke and rate of each displacement or reciprocation of the ram member in conjunction with the volume of the mold cavity and the kind of the material to be molded. The extruded amount of the material is adjusted in conjunction with the volume of the mold cavity.

Abstract: A resin molding apparatus which can produce a molded resin article having neither a runner nor a gate portion thereon. The resin molding apparatus comprises a pouring pot including a pot having a heating member provided therein, and a piston member disposed for up and down movement within the pot and having a lifted position in which the piston member defines part of a mold cavity. Since the appratus has no runner or gate portion therein, the necessity of a high injecting force to be applied to a metal mold and hence of a high mold clamping force can be eliminated and the overall size of the apparatus can be reduced.

Abstract: An improved shot tip for a metal injecting shot sleeve wherein the tip comprises a beryllium-copper alloy head having a domed front face and an interior cooling chamber. A baffle is located on the end of a coolant exhaust tube inside of the coolant chamber. Coolant water enters the shot tip head by flowing around the outside of the tube and exits the shot tip head through the tube itself, the aluminum baffle and a flow directing deflector.

Abstract: This invention relates to a two-way cooling pipe for cooling a die or mold which is used for die casting or a similar forming process. This pipe is a hollow pipe, the interior of which is divided axially by a baffle which provides a forward channel and a backward channel for the cooling water to pass. Cooling of the die is achieved by feeding cooling water to the inside of the die from the forward channel in the cooling pipe which has been inserted in the die from the back thereof, and then removing the cooling water through the backward channel of the cooling pipe.

Abstract: A heating and cooling jacket for the distributor of a injection-molding machine comprises tubular inner and outer sleeves and possibly an intermediate sleeve which defines compartments filled with a high-density particle compacted mass around the cooling tube turns which hug the inner sleeve and electric heater turns which hug the intermediate sleeve.

Abstract: A device for tightening a coil on a cylindrical body. The device has a first anchor for connecting one end of the heater coil to the cylindrical body, and a second anchor for connecting the second end of the coil to a rotatable ring on the cylindrical which forms a passageway between an injector and a mold in an injection molding apparatus. A threaded portion is arranged on the rotatable ring so that it engages directly with the cylindrical body or with a stationary ring member on the cylindrical body in a manner similar to a worm gear mechanism. Due to the rotation of the threaded member, a force is generated to stretch the coil, thus bringing the coil into positive contact with the surface of the cylindrical body along the entire length of the coil.

Abstract: Apparatus for making injection molded polymeric articles, comprising a vibratory pneumatic cooling assembly adapted to dissipate thermal energy from the polymeric articles after they are ejected from the mold cavities through use of an oscillating perforated vibratory grid adapted to maintain the articles in relative motion while at least partially supporting them on a substantially uniform cushion of air. A method for employing the apparatus of the invention to substantially reduce the cycle time required for injection molding polymeric articles is also provided.

Abstract: An injection molding machine includes a platen having a plurality of regularly spaced mold element-receiving chambers adapted to receive any of a number of various mold elements substantially wholly within the stationary platen. A hot manifold system is included between the stationary platen and a plastics injector unit, which includes a plurality of blocks independently coupled to the fixed platen, each block having channels through which the plastics material can flow, the channels of adjacent blocks being coupled by a coupling unit. The machine is particularly designed for quick inexpensive mold changes, and has particular utility in laboratory testing of mold designs and small low-capacity production in satellite plants.

Abstract: The apparatus substantially comprises two semicylindrical structures therebetween a gap is defined provided, at opposite positions, with cooled air inlet and outlet ports. The gap encompasses the portion of the machine to be cooled and/or temperature controlled, the air circulation being assured by fans arranged, together with the cylindrical structures, in a box-shaped body consisting of two vertically extending opposite walls supported by the extruder cylinder and being closed, at the top and on its sides, by a removable casing, in such a way as to define, on the sides of the semicylindrical structures, cooling air circulation ducts therealong air flows before arriving at the gap defined by the semicylindrical structures.

Abstract: A pre-shaped aluminum plate is held against the flat end wall of an inverted mold cavity by vacuum pressure communicated through bore holes in the wall leading to a vacuum chamber in the mold body. A high temperature PTFE gasket shaped to match the plate fits in an annular recess in the wall to provide a seal between the wall and plate. Polyurethane foam expands and hardens in the mold cavity to further press the plate against the wall and to form a foamed plastic water ski having a flush aluminum deck. The mold cavity has a curved side wall to produce a ski having a radiused edge about the deck.

Abstract: An injection apparatus of an injection molding machine includes a heating cylinder and a screw disposed in the heating cylinder, and the screw is axially moved and rotated in the heating cylinder for plasticizing the molten material by mechanisms or devices assembled in the injection apparatus, which is driven by electric drive means through driving power transmission means. The electric drive means comprises two servomotors and the power transmission means comprises two power transmission mechanisms operatively connected to the servomotors respectively so that one of the two servomotors drives a mechanism for axially moving the screw through one of the two power transmission mechanisms and the other of the two servomotors drives a mechanism for rotating the screw through the other of the two power transmission mechanisms, parallelly or concurrently.

Abstract: A heater device for tightening a coil on a cylindrical body which forms a passageway between an injector and a mold in an injection molding apparatus. The device has a first anchor for connecting one end of the coil to the cylindrical body, and a second anchor for connecting the second end of the coil to a rotatable ring on the cylindrical body. A threaded portion is arranged on the rotatable ring so that it engages directly with the cylindrical body or with a stationary ring member on the cylindrical body in a manner similar to a worm gear mechanism. Due to the rotation of the threaded member, a force is generated to stretch the coil, thus bringing the coil into positive contact with the surface of the cylindrical body along the entire length of the coil.

Abstract: A hot-runner tool with at least one hot-runner section for supplying molten plastic to an injection mold, preferably a multiple injection mold with a pin-point gate for each casting. The hot-runner section has an outer housing with a flow channel, at least one inlet, and at least one outlet and a heat conductor that can be connected to an electric voltage and that the molten plastic flows around. The flow channel in the hot-runner section is demarcated externally by at least one metal tube that is separated from the heat conductor and a layer of heat insulation is positioned between the metal tube and the inner surface of the outer housing. The metal tube can store and conduct a lot of heat and helps to heat up the plastic rapidly. Since the tube supplies additional heat to those points along the hot-runner section where the plastic needs more heat than at other points, the tube homogenizes the molten plastic along the total length of the hot-runner section.

Abstract: The injection machine according to the present invention has an infrared ray heater disposed outside a transparent glass tube cylinder a reflector disposed outside the infrared ray heater, an injection cylinder to which the glass tube cylinder is coupled by way of a changeover valve, a transfer mechanism to transfer the resin material from the glass tube cylinder into the injection cylinder, and an injection plunger in the injection cylinder to inject the molten resin. Since an infrared ray heater is used for the purpose of melting the resin material, a desired temperature can be achieved in a few minutes, and the forming may be started in a short time.

Abstract: An injection molding machine is disclosed in which molten resin from an extruder is injected into the cavity of a mold through a nozzle. A runner body disposed between the mold and the extruder has a substantially L-shaped hot runner for supplying the molten resin from the extruder to the mold therethrough. The runner body is pivotably supported by a support assembly and is horizontally slidable relative to the support assembly to accommodate thermal expansion, whereby the nozzle mounted on the runner body can be brought into or out of intimate contact with the mold. To accommodate the thermal expansion of the runner body only toward the extruder, a stopper is provided on the base frame.

Abstract: Disclosed is a process for the production of a shaped article from a thermoplastic resinous material, comprising the steps of heat plastifying the thermoplastic material; injecting the heat-plastified plastic material into a forming tool having a first shape configuration and at least one parting plane, to form a pre-form of the thermoplastic material; subjecting the thermoplastic material pre-form in the forming tool to a cooling phase; providing at least a partially new second shape configuration to the forming tool containing the pre-form; and during the cooling phase subjecting the pre-form in the forming tool having the second shape configuration to at least one pressure treatment under elevated pressure to produce a shaped article. Also disclosed are several embodiments of apparatus for carrying out the process.

Abstract: A system is disclosed for extruding, drawing, vacuum molding or processing, or the like hot processing of plastomers or elastomers, which can conveniently utilize the hot air from the cooling process of its heated component parts. The system makes use, to heat the extruder cylinder, of ventilated electric thermal units wherein ventilation is performed in closed circuit fashion. In particular, arrangements are made to convey the hot air from the cited electric thermal units, through specially provided ducting, to areas of the system where application of heat is required.

Abstract: An electric thermal unit is disclosed for controllably heating cylinders in plastic material extruders, rubber drawing machines, and the like apparata. The electric thermal unit is designed to provide closed circuit ventilation air circulation such as to enable the heated outlet air to be used for other applications, whether related or not to the proper operation of the cited apparata.

Abstract: Apparatus for forming objects from molten material includes a mold frame and a movable mold side having complementary faces that define molding cavities. The mold frame includes a mold housing having an internally heated manifold which has a plastic distribution channel for feeding plastic to an injection nozzle passageway having a restricted discharge nozzle that discharges the plastic into a molding cavity. Within the injection nozzle passageway is a heater probe which has an internal heater, preferably an electrical cartridge heater. The probe is secured by an integral seating flange to the mold housing to hold the probe coaxially aligned in the injection nozzle passageway and to hold the probe against shifting with thermal expansion and contraction of the manifold.

Abstract: An apparatus for the heat treatment of a product includes a metallic heat transfer assembly for transmitting heat either directly to the product or to a mould containing the product. The heat transfer assembly comprises a plurality of separate parts which are joined together either permanently or in an operationally separable manner. Each part includes a gas distribution passageway, the passageways together defining a closed loop path for receiving and circulating around the heat transfer assembly hot permanent gas from a hot gas source. One or more heat transfer passageways formed in the heat transfer assembly itself, or between the heat transfer assembly and the mould, communicate with the closed loop path in the heat transfer assembly so as to receive hot gas therefrom and lead this gas to an exhaust outlet to the atmosphere.

Abstract: A molding machine for producing footwear soles includes a frame carrying a pair of extruders for thermoplastic material at one end; a pair of bottom molds mounted on hot runner systems on the other end of the frame; a pair of vertically movable top molds mounted above and cooperating with the bottom molds to define mold cavities for receiving the thermoplastic material from the hot runner systems; a swing out system for swinging each top mold from a horizontal molding position to an unloading position; gripper jaws for gripping the soles and removing them from the top molds; and swing arm assemblies carrying the gripper jaws for carrying the soles away from the molds to conveyor or packaging locations.

Abstract: An apparatus and method for molding polycarbonate lenses is disclosed in which the lenses are formed in a single injection molding operation. Polycarbonate is injected into a cavity between two movable dies which are forced apart by the injected polycarbonate. These dies are then urged together forcing a portion of the injected polycarbonate back through the same port through which the polycarbonate was injected. The finished lens does not have the knit line normally associated with injection molded lenses.

Abstract: An injection molding machine wherein both a clamping mechanism and an injection mechanism are actuated by means of a servo-motor, in which machine, mold opening and closing and clamping on the clamping mechanism side are carried out by gear means provided over a transmission shaft positioned on the clamping mechanism side and a rotary member threadedly engaged with a plunger having threads in the periphery thereof, the operation for advancing and rotating an injection screw on the injection mechanism side is carried out by advancing and rotating means by a rotary shaft and gears provided within a housing and transmission means by a plurality of gears provided together with an electromagnetically-operated clutch member in a portion of said transmission shaft positioned on the injection mechanism side, said machine comprising an electromagnetically-operated clutch mechanism for temporarily stopping the application of a turning force by said servo-motor to the clamping mechanism side, and a force retaining devic