Abstract: A cooling system for use with a glassware machine having a plunger, a mold and a valve. The system includes a supply of cooling fluid such as air. The system further includes devices for cooling the plunger, the mold and the valve that are in communication with the supply of fluid.

Abstract: An injection molding one-piece gate and cavity insert with the gate extending therethrough which receives a heated nozzle and forms part of the cavity. The gate and cavity insert has a cooling fluid passage extending through it. The gate and cavity insert has an inner portion, an outer portion and a gate portion. The inner and outer portions which are in contact with the cooling fluid are made of a corrosion resistant material such as stainless steel. The gate portion which is not in contact with the cooling fluid is made of a more wear and heat-shock resistant material such as H13 tool steel or a tungsten carbide.

Abstract: An injection molding one-piece gate and cavity insert to be mounted between a heated nozzle and a cavity. The insert has cooling fluid passages extending through it around the gate and cavity. The passages alternately extend both forwardly and rearwardly and inwardly and outwardly to improve cooling.

Abstract: A cup of plastics material incorporating foaming agent has thin wall portions, namely a base 101, a lower side wall 102 and an upper side wall 103. These portions have their wall thickness determined by mould part gap. The cup also has thick wall portions, namely the corner 104, the band 105 and the rim 106, in which foaming occurs after mould opening so that the wall thickness is increased beyond that provided by the mould.

Abstract: The usual practice when molding thermoplastic sheets is to form the sheets in a closed mold and leave the sheets in the mold until the sheets have cured sufficiently for removal and further processing or shipping. The sheet cooling or curing step is the longest step in the molding operation. In order to speed up the process, it is advantageous to remove the plastic sheet from the mold for cooling the sheet at a location separate from the mold. The present invention provides a simple sheet cooling apparatus, which is similar to a mold, including a lower cooling clamp fixed in a frame, an upper cooling clamp movably mounted in the frame for movement between an open position in which the clamps are spaced apart for receiving a plastic sheet, and a closed position in which the sheet is sandwiched between the upper and lower clamps, a manifold at one end of each clamp for introducing cooling water into both clamps and a second manifold at the other end of each clamp for discharging the cooling water.

Abstract: An apparatus for molding composite articles includes a pair of opposed matched-tool mold sections, each having a rigid housing and a thin, semi-rigid membrane removably and sealably mounted on the housing so as to define a fluid-tight chamber therein. The chamber of each mold section is filled with a noncompressible heat-conductive fluid to provide fluid backing to the portions of each membrane defining the molding surfaces of each mold section. A system of temperature control coils extending within each chamber are connected to an external heater/chiller unit to permit circulation therethrough of a suitable temperature control fluid, whereby positive control of the temperature of the backing fluid and, correlatively, the molding surfaces of the membranes.

Abstract: A molding system includes a bottom die having a bottom blind hole, an upper die controlled to mold a molding with the bottom die, and a water circulation system connected to the bottom die at a bottom side and having a T-hole disposed in communication with the blind hole on the bottom die for circulation of cooling water to cool down the bottom die and the molding molded in between the bottom die and the upper die, a leakage sealing device mounted between the water circulation system and the bottom die to seal the gap and to divide the T-hole into a water inlet and a water outlet, and a spiral water guide mounted on the bottom die and pressed against the leakage sealing device, the spiral water guide defining a spiral water circulation passage in the blind hole in bottom die for guiding cooling water from the water inlet to the water outlet through the blind hole in a spiral manner to evenly and quickly cool down the bottom die.

Abstract: A resin compound for a molding die, a molding die made of the resin compound, and a molding method using the molding die are disclosed. The resin compound includes thermoplastic resin, inorganic fiber reinforcing material and inorganic particle filler, has a flexural strength of 1000 kgf/cm.sub.2 or more and a modulus of elasticity in bending of 70000 kgf/cm.sup.2 or more, and allows machining. A deflection temperature under flexural load of the compound may be 180.degree. C. or more. From this compound, it is possible to provide a core, a cavity block or the like of molding dies which can be accurately finished by machining finishing with a low cost and within a short term, have durability and allows recycling. The molding dies can be applied to various molding methods, and provide accurate molded products with a low cost.

Abstract: Injection molding hot runner apparatus having a cooled mold core with an elongated body portion with a front portion or head. A cooling tube extends centrally in body portion of the mold core. A cooling fluid circuit extends from the open front end of the cooling tube outwardly through a number of spaced radial bores. Each radial bore connects to an L-shaped duct leading back to a cylindrical space around the cooling tube.

Abstract: An improved injection molding apparatus for molding snap-on, thermoplastic air bag covers is provided including a plurality of wedge-shaped outboard mold parts slidably mounted on bearing surfaces of a plurality of gibs which are removably mounted to a central wedge all nested together within a central recess in the lower mold half in retracted positions of the outboard mold parts. Each of the outboard mold parts has a clip member-defining surface for forming front and rear sections and a snap-on groove of its corresponding clip member of the air bag cover. Each outboard mold part is in sliding contact with its respective gib during its entire sliding movement between its retracted and fully extended positions.

Abstract: A device for encapsulating a plurality of semiconductor die comprises a form having first and second halves such that as the first half contacts the second half the first and second halves have a plurality of cavities therein. The first and second halves each comprise a conduit therein for receiving a heated liquid. The device further comprises a runner block having a hole therein, a separate runner for each cavity, and a conduit therein for receiving a heated liquid. The runners have a rectangular cross section and a width to height ratio of at least 3:1. The device further comprises a mounting plate for mating with the runner block. The mounting plate comprises a concave recess and a hole in the mounting plate at the recess. The hole in the mounting plate passes through the mounting plate to align with the hole in the runner block such that an encapsulation material can be passed between the mounting plate and the runner block.

Abstract: A liquid cooled wax mold includes a generally rectangular two-part heat transfer member formed by separable metal plates. One of the plates includes elongated parallel vertically-extending heat transfer bars or fins defining parallel liquid coolant flow passages. The coolant flow passages interconnect spaced apart liquid coolant distribution and collection passages which are, respectively, connected to coolant inlet and discharge passages. A dam is interposed between the coolant collection passage and the discharge passage to provide for purging air or coolant vapor from the coolant flow circuit. Elongated circular cross section seal strips are disposed in grooves formed in one of the plate members to provide a fluid-tight assembly of the heat transfer member. Mold endwall and bottomwall members are secured to the heat transfer member by socket head machine screw fasteners.

Abstract: In a temperature-controllable tool (11) or mould for producing plastic mouldings with at least one cavity (12) to accept the mould of the plastic moulding to be produced, at least one inlet or outlet aperture (13, 14) which are interconnected via channels (15) and form a temperature-control agent channel system for cooling or heating the mould cavity (12), the shot time (cycle time) is shortened, maintenance is made easier and higher quality injection-moulded components are obtained in that the run of the channels (15) is matched to the outer shape of the mould cavity (12) and the geometry of the channels (15) is matched to the temperature profile in the plastic moulding.

Abstract: A golf ball molding apparatus includes a mold comprising a pair of upper and lower mold halves (1 and 2) adapted to be mated to define a spherical cavity therebetween, each mold half being formed of a non-magnetic material and having a thin film layer (4) of a magnetic material applied to a cavity-defining surface thereof. An induction heating coil (5) is embedded in each mold half adjacent to the thin film layer. A cooling channel (6) is extended in the mold half for passing coolant water therethrough. A high-frequency oscillator (11) is coupled to the coil (5) for generating a magnetic field having magnetic lines of force across the thin film layer whereby the thin film layer generates eddy current to heat the cavity-defining surface. Molten stock material is then injected into the cavity. Coolant water is passed through a bore of the coil and the channel for cooling the mold and the coil whereby the stock material solidifies.

Abstract: A mold insert for an injection molding machine has a circumferential liquid conduit groove and a plurality of liquid-receiving bores extending inwardly from the groove. Baffles are removably inserted into the liquid-receiving bores and have heads located in locking engagement with the sidewalls, including the undercut portions thereof, to retain the baffles in their respective liquid-receiving bores. Each baffle has a blade that fits snugly within a liquid-receiving bore to separate the liquid-receiving bore into a liquid inlet passageway and a liquid outlet passageway. Fins project outwardly from opposite faces of the blade to create turbulence in liquid flowing into and out of the liquid-receiving bore, which enhances cooling (or heating) of the mold insert. The baffle is also useful with other solid components having a liquid conduit for cooling purposes and a transverse liquid-receiving bore intersecting the liquid conduit.

Abstract: In a method for tempering an injection molding tool having a plurality of cooling conduits, in which a coolant liquid can be introduced in controlled fashion, wherein the injection molding tool has a mold recess into which molten molding composition is injected during an injection cycle and is ejected after solidifying, it is provided in order to optimize the heat dissipation that the cooling conduits are positioned parallel relative to the closest wall of the mold recess in such a way that the thermal energy to be dissipated in the injection cycle, resulting from the sum of the thermal energy of the part to be molded and heat exchange with the surroundings of the tool and the externally supplied energy, can be carried away maximally in the time of the heat transfer from the melt to the tool wall.

Abstract: An improved golf ball injection mold is characterized by upper and lower support plates each containing corresponding hemispherical cavities which define spherical mold cavities when the plates are brought together. A plurality of retractable core pins are arranged in each cavity for supporting a core of a golf ball. A runner within the plates delivers fluid thermoplastic material to each cavity to form a cover on the golf ball core supported therein, and a cooling channel is provided adjacent to each cavity to provide even cooling of the thermoplastic material. Independently operated ejection assemblies are provided for the golf ball and for the residual thermoplastic material in the runner. With the improved ejection mold, the size and roundness of the golf ball and the surface configuration of the golf ball cover are more consistent and the molding time is reduced.

Abstract: A method and apparatus for producing a plastic article. The plastic is introduced into a mold that can be tempered and that has at least one hollow chamber, the contour of which corresponds to the outer contour of the article. During manufacture, the mold is heated up and removal of the article is effected with a cooled mold. To shorten the cycling time, the inner region of the mold that adjoins the hollow chamber is cooled and heated at least partially independently of the outer region that is remote from the hollow chamber, while the outer region is held at a temperature that is higher than the temperature during removal.

Abstract: An optical disk molding apparatus is provided which includes a fixed side mold assembly and a movable side mold assembly. Each mold assembly has a mounting plate, a disk cavity plate, a temperature control liquid passage, and a temperature control liquid sealing device. The temperature control liquid sealing device is comprised of at least one annular aperture formed between the mounting plate and the disk cavity plate around the inner or the outer circumference of the temperature control liquid passage in each of the mold assemblies, a rigid ring fitted within the annular aperture such that there is only a minute clearance between the inner wall of the annular aperture and the rigid ring, and a heat resistant sealing filler charged between the inner wall of the annular aperture and the rigid ring.

Abstract: A cooling device of an injection mold for an optical disk substrate reduces the chances of cavitation caused by a turbulent flow of passing cooling water, thus enabling a disk cavity plate to be cooled uniformly. A plurality of main arc-shaped passages, which have the same cross-sectional shape and which are concentrically arranged, are provided at a pitch "p" from the inner circumference on the rear surface of the disk cavity plate of the optical disk substrate injection mold. Further provided are a connecting arc-shaped passage having a radius of "p" which connects a first main arc-shaped passage having a radius of R.sub.1 with a second main arc-shaped passage having a radius of R.sub.

Abstract: An on-demand fast cycle mold for producing injection molded products such as polypropylene blister package bases. The on-demand fast cycle mold has a heated and cooled hot runner system which provides a short response time and optimal temperature control. On-demand injection molding is made possible by a pulse modulated closed loop mold cooling system, the cooling design of brazed gate inserts, and an effective layout of the cooling channels. The programming of the software for a computer control system has also been designed to achieve on-demand injection molding. The design of the closed loop mold cooling system incorporates an advanced cooling circuit layout, and provides for easy maintenance and better quality control of the coolant which significantly reduces corrosion and scale buildup. Mold cooling is controlled by sensors installed inside the mold which are used in feedback control loops.

Abstract: A method for tempering an injection mold wherein in a recurrent cycle, the molten material is introduced under pressure into the mold recess of the injection mold, hardened and removed from the mold. Coolant or heating medium is supplied as a function of the deviation of the measured actual temperature from the desired command temperature. A plurality of flow control valves for the coolant or heating medium are preferably controlled via a measuring sensor. The three-dimensional quantitative distribution of coolant as needed is ascertained empirically or by computer with respect to the particular mold and the runners provided in the mold for the coolant or heating medium, and at least one specific time in the cycle period a comparison is made between the command temperature and the actual temperature of the one measuring sensor.

Abstract: The present relates to an apparatus for molding plastic parts which includes a cavity insert and a core insert wherein each insert has an open area on the shell or back side thereof. A device for circulating fluid through each chamber cools the inserts. In one preferred embodiment, the cavity and core inserts are made using a mold having a ceramic formulation including generally uniform size aggregate materials and carbon fibers. In certain embodiments, the apparatus further includes pressure bearing devices for absorbing molding pressure during operation of the molding apparatus.

Abstract: The invention is an improvement to mold frames having replaceable half-molds for forming golf balls. The invention is directed to dividing the flow path through the mold for the thermal medium into a plurality (2 to the number of cavity rows) of parallel flow paths, i.e., water entering the mold flows through only one row of half-molds.

Abstract: An apparatus for molding polystyrene mold halves which are used, for subsequent molding of a soft contact lens. The apparatus is designed with superior heat conduction capacity so as to minimize the molding cycle time, while simultaneously producing uniformly precise and accurate optical quality surfaces. Molten polystyrene is provided via a hot runner system to a plurality of mold cavities. In a specific variation, the convex surface provides the optical quality surface to the concave surface of the mold half produced thereby. The structural element which defines the convex surface includes a hollow cylindrical bushing and a removable power insert mounted therein, which may be changed so that the prescription strength of the contact lens to be formed by the mold may be varied. In a first embodiment, the power insert includes only a convex surface at its operational end.

Abstract: The present invention relates to a modular fluid distribution block having particular utility in a cooling system for the mold of an injection molding machine. The fluid distribution block of the present invention is characterized by a housing having a plurality of ports in fluid communication with each other and a plurality of feet. The feet have three orthogonally arranged bores machined therein to allow the fluid distribution block to be connected to another fluid distribution block, a plate for closing off a port and/or a fitting for allowing the fluid distribution block to be connected to another component such as a flexible hose. The fluid distribution block is preferably formed from a corrosive resistant material to avoid the problem of scaling. The manner in which the fluid distribution block is incorporated into a system for providing a mold with cooling fluid is also described.

Abstract: The tempering process is divided in two phases, a start-up phase and a stationary operating phase, each having different tempering conditions, whereby the start-up phase is completed after the preset nominal tool temperature has been reached or exceeded for the first time, and the meantool temperature is continuously measured during the entire cycle duration at a precisely defined site, and whereby at time Z.sub.2, the latter being fixed by a signal of the machine sequence control, a cooling medium impulse, the latter taking into account the tempering in the preceding cycles, is induced close in time to the injection process in order to effect the required heat dissipation within the time range of the greatest temperature difference between the injected melt and the cooling duct, and further cooling medium impulses are induced as the result of a should be-actual comparison occurring at time Z.sub.2 if the preset nominal temperature is exceeded, whereby the time Z.sub.

Abstract: A mold assembly for forming a panel assembly having a gasket on one surface for use as a flush-mounted panel or window in vehicles, buildings, or other structures includes a mold cavity defined in a facing surface of one mold section and a pressure pad on the second mold section, the pressure pad being urged against the surface of a sheet-like panel at a position opposite the mold cavity with the panel being held against a support surface adjacent the mold cavity when the mold sections are closed. Preferably, the pressure pad is a heat insulative pad which is urged against the panel surface by a resilient member preferably formed from urethane. The support surface and mold cavity are preferably raised above and offset from adjacent portions of the first mold section, and the size of the raised area of the support surface and mold cavity preferably corresponds in size to the area of the pressure pad.

Abstract: An adaptable mold assembly (10) consists of two mold bases (100, 102). One or both of the mold bases has at least one interchangeable portion (104, 105) removably mounted on the mold base, whose function is to actuate in a direction different from the draw direction. The interchangeable portion is typically used to facilitate the removal of the molded part from the mold, and often functions as a mold slide or pull. The ability to interchange and reconfigure the mold base reduces tooling costs and adds design flexibility to the tool. In another embodiment of the invention, the function of the interchangeable portion (106) is to provide process monitoring, process control or process optimization.

Abstract: The present invention is directed to a method and an apparatus for forming glass articles from molten glass involving differentially cooling a plunger for press forming glass articles in a cooperative forming mold. More specifically, the method involves introducing cooling fluid into an inlet cooling cavity located in the upper portion of the plunger and causing the cooling fluid to flow from the inlet cooling cavity into a cooling passage located along the periphery of the nose portion and thereafter to flow into a outlet cooling cavity located in the upper portion of the plunger and thereafter exhausting the spent cooling fluid from the plunger.

Abstract: A segment used for producing a composite insulator having a core member and a housing member arranged around the core member and constructed by a trunk portion and a shed portion is disclosed. The segment has a pair of segment molds detachably connected at a partition plane and a heating and cooling passage arranged in the segment molds respectively. The segment molds have a through-hole through which the core member is arranged, an upper plane forming portion arranged at its one end surface for defining an upper plane of the shed portion, and a lower plane forming portion arranged at its other end surface for defining a lower plane of the shed portion. A heating or cooling medium is passed through the heating and cooling passage. Moreover, a mold is constructed by integrating a plurality of segments with the heating and cooling passage mentioned above.

Abstract: Thread split inserts used in injection molding bottle preforms of polyethylene terephthalate (PET). Each insert has a curved inner surface. A pair of inserts are mounted in the mold facing each other so the inner surfaces combine to form an opening therethrough. The opening provides the portion of the cavity which forms the neck portion of the preform. Each of the thread split inserts has an enclosed conduit through which cooling fluid circulates to improve cooling and reduce molding cycle time. The cooling fluid conduit has three curved portions which extend around the curved inner surface. Two of the curved portions extend in one plane and the other curved portion of the cooling fluid conduit extends in a second parallel plane.

Abstract: A mold for molding disk substrata is capable of changing a set position of a stamper plate on a mold cavity. A pair of mirror plates are respectively for forming the surface of a disc cavity or for back stay of stamper plate. The set position of mounting the stamper plate is capable of being performed due to changing selectively the set position of the mirror plate. An inner stamper holder and stamper plate are held on the mirror plate by vacuum force to admit setting operations to ease.

Abstract: This invention provides a plastic molding method, a mold, and a molded article. According to this invention, the supply flow rate of a coolant, e.g., cooling water, to a mold is maintained to shorten the molding cycle and to improve the productivity in continuous molding. The temperature distribution and pressure distribution in the mold are measured, thereby realizing determination as to whether a molded article is defective or not in the molding and cooling processes. The temperatures at respective required portions of the molded article removed from the mold are monitored, so that determination as to whether a molded article is defective or not can be performed, thereby improving the productivity. Countermeasures are taken not to deform the molded article. A thermoplastic resin injected from a hot runner into a cavity is heated at a gate discharge portion by a shearing heat upon injection. Countermeasures are taken to suppress temperature increase caused by this heat.

Abstract: An injection molding apparatus for a preform is disclosed, having an injection molding station (14) and a cooling and ejection station (16). In the injection molding station (14), neck cavity molds (60), injection core molds (50) and an injection cavity mold (42) are clamped and preforms (1) are injection molded. Thereafter, the injection cavity mold (42) is separated at a relatively high temperature. The preforms (1) are transferred to the cooling and ejection station (16) while being cooled by the injection core molds (50) and neck cavity molds (60). While the next preforms (1) are being injection molded in the injection molding station (14), in the cooling and ejection station (16) cooling of the preforms (1) continues. After cooling the preforms (1) to a temperature suitable for release, the injection core molds (50) are separated only through a stroke sufficient to allow a space to open between core pins (52) of the injection core molds 50 and the inner surface of the preforms (1).

Abstract: A quick change system for standard mold bases in a molding machine includes an adapter frame mounted on the face of each platen of the press, each adapter frame having a U-shaped guide channel, and a support plate for supporting a mold base half for slideably engaging the channel. A coolant hookup manifold including first connectors is mounted on the adapter frame, and a second coolant hookup manifold including second connectors is mounted on the support plate. The first and second connectors are configured to automatically sealingly engage as the support plate and mold slide into engagement with the adapter frame.

Abstract: An arrangement for molding a front or back polystyrene mold half which is used, with a second complementary back or front mold half, for subsequent molding of a soft contact lens such as a hydrogel soft contact lens. Each mold half defines a convex curved surface and a concave curved surface spaced therefrom, with one of the surfaces defining an optical quality curved surface for the soft contact lens. A heated molding machine introduces molten polystyrene through a hot runner system to a plurality of mold cavities, each of which defines an optical quality curved surface and also a second noncritical surface. The optical quality surface of the mold cavity is positioned further away from the heated hot runner side of the mold than the second surface, which allows faster cooling of the optical quality surface of the mold cavity. Each mold cavity has a first insert on the optical quality side of the mold cavity and a second insert on the second side.

Abstract: Disclosed are mold halves useful in molding a contact lens by polymerization of a polymerizable composition disposed between the mold halves. The mold halves are of rigid thermoplastic, preferably polystyrene, transparent to ultraviolet light.

Abstract: Method for tempering a molding tool intended for production of products of natural or synthetic polymers, which molding tool includes one or more molding parts (3, 4) made of sintered metal with communicating pores obtained by pressing at a high pressure and sintering at a high temperature of a powdered material, in which molding part or parts (3, 4) a molding cavity (9) has then been made, whereby preferably the outer envelope surface of the molding tool is tight. The method comprises tightly connecting one or more channels, capillary tubes (6, 8) or the like through the tight outer envelope surface to the mould material of the molding tool situated inside, which material contains a large number of small communicating pores and feeding a gas having a suitable state and a suitable temperature through the channels thereby causing a rapid tempering of the molding tool to a desired extent.

Abstract: A parison injection molding apparatus injection molds parisons, transfers them to cooling stations and then ejection stations. While at the injection molding station, cooling stations and during transfer therebetween up to the time they are ejected, the parisons are continuously cooled.

Abstract: A parison injection blow molding apparatus injection molds parisons, transfers them to cooling stations then to orient-stretch blow stations and thereafter ejection stations. While at the injection molding station, cooling stations and during transfer therebetween prior to being placed at the blow stations, the parisons are continuously cooled. The parisons are transferred to each station by an axially and laterally indexing platen.

Abstract: In an injection mold having a cavity formed between opposing faces of a fixed mold and a movable mold for defining a shape of a product, and cooling channels formed in the fixed mold and the movable mold, respectively, for cooling resins injected into the cavity, cooling channels of the movable mold are formed at positions at least opposite to those where cooling channels of the fixed mold are not formed, thereby obtaining an injection mold capable of securing uniformity of optical properties of the obtained molded article, such as birefringence and causing no deterioration of mechanical properties of the molded article such as a deflection even when a cooling time is shortened in order to increase cycle of the injection molding.

Abstract: A multilayered insulated mold structure for forming textured articles is disclosed. An insulation layer is deposited on the mold core and a multilayered skin layer is deposited on the insulation layer. The skin is formed of a plurality of sublayers, including a corrosion-resistant phosphorous-rich nickel region on the insulation layer acting as an etchant stop, and an non-corrosion resistant, or etchable, phosphorous-poor nickel region on the corrosion-resistant layer. The upper layer is uniformly textured by selective etching down to a depth terminating at the interface between the layers, but the insulation layer is protected. A method of molding uniformly textured articles is also disclosed, as is a method of making a mold suitable for producing uniformly textured articles and a method for making such a mold surface having bulk imperfections.

Abstract: Method for tempering a moulding tool intended for production of products of natural or synthetic polymers, which moulding tool includes one or more moulding parts made of sintered metal with communicating pores obtained by pressing at a high pressure and sintering at a high temperature of a powdered material, in which moulding part or parts a moulding cavity has then been made, whereby preferably the outer envelope surface of the moulding tool is tight. The method comprises tightly connecting one or more channels, capillary tubes or the like through the tight outer envelop surface to the mould material of the moulding tool situated inside, which material contains a large number of small communicating pores and feeding a gas having a suitable state and a suitable temperature through the channels thereby causing a rapid tempering of the moulding tool to a desired extent.

Abstract: Injection molds suitable for use in injection molding, structural foam molding, low-pressure injection molding, and gas-assisted injection molding of plastic articles are described. The injection molds contain a thin metal layer contoured on its outer surface to the shape of the article to be molded, a rigid thermoset plastic material cast upon the inner surface of the metal layer and supporting the metal layer, and heat transfer elements cast within the plastic material and located adjacent to the metal layer to transfer heat for the metal layer and the plastic material. Preferably the thin metal layer is nickel, the plastic material is epoxy, and the heat transfer elements are metal chips and heat transfer tubing. The injection molds of the present invention can be prepared at considerable cost and time savings relative to conventional injection molds.

Abstract: In injection molding, a mold forms a wall member, which defines a cavity, by bringing together two mold halves. The cavity wall is formed by a specially machined cavity plate having built-in support columns, fins and ejector pins columns. The plate forms a passageway and in-out flow chambers on the opposite side from the cavity surface which completely surrounds the cavity where coolant or heating circulating carrier flows at high rates. The resulting flow of coolant/heating carrier at high rates can be controlled by special positioning of the flow chambers and creates added turbulence. The built-in support columns, fins and ejector pins also dramatically increase the area of contact of the flow carrier with the cavity plate. The design incorporates built-in support columns and fins which make possible a thinner cavity surface plate by adding strength and structural support to the cavity area.

Abstract: An injection-molding metal mold used for injection-molding a body having a precision portion which is formed at high precision includes a molding cavity in which a precision molding portion for molding the precision portion is set to have a heat conductivity higher than that of general molding portions for molding other portions of the body and shortens the time required by a molding cycle to mold a body having a precision portion. Also, an injection-molding metal mold used for injection-molding a body having a precision portion which is formed at high precision includes a molding cavity constituted by a molding member in which a precision molding portion is formed to mold the precision portion and general molding portions for molding other portions. Also provided is an ejector pin, disposed adjacent to the molding member to partially constitute the cavity; for ejecting a molded body; and a cooling unit for cooling the molding member through the ejector pin.

Abstract: The state in which a mold is filled with molten resin is held constant at all times by holding constant the temperature of the mold at the start of injection of the resin, thus suppressing a fluctuation in the weight and dimensions of the molded articles. Cooling channel are arranged around a cavity of an injection mold filled with a heated molten resin. Use is made of a response model of a variation in mold temperature in the injection mold. The variation in mold temperature, coolant temperature and temperature of the filling molten resin in a molding cycle are measured, and a parameter (time constant) of the response model is decided using these measured values.

Abstract: A machine for overmolding an equipment of an underwater cable includes a heated mold. The mold has a fixed half-mold with two side injection molding inlets and a mobile half-mold on a machine frame. These are coupled to a high-pressure injection molding press through an overmolding material distribution chamber and to the ends of the mold cavity. The machine finds an application in overmolding joint boxes and repeater housings.

Abstract: Apparatus includes a female mold and a mold core cooperating with the female mold to form a mold cavity therebetween in the mold closed position for the formation of a threaded, molded article therein. A movable, rotatable stripper ring is provided over the core, and a rack and pinion are provided to rotate the stripper ring from a rearward to a forward position and thereby remove the threaded article from the mold core by rotating same.