Abstract: An injection mold for optical discs has a stamper mounted on any one of mold surfaces defining a mold cavity, a cylindrically shaped center pressing member being inserted into and engaged with a center portion of the stamper, and a cylinder piston being placed at a center portion of the mold and movable in forward and backward directions by a fluid pressure in relation to the center pressing member so as to make the center pressing member in contact with the top of the cylinder piston whereby the stamper is detachably mounted on the mold by the center pressing member.

Abstract: An identification device for a mold for impressing identifying indicia on each product molded in the mold. A plug retaining insert includes at least one bore through a working face of the insert. A plug member is located in each bore, with the plug member comprising a plug substantially filling the bore proximate the face of the insert, and a shank extending axially into the bore from the plug. A retainer is threaded on the shank, and a spring, bearing against the retainer, seats the plug member in the bore. Indicia of various kinds are located on both the surface of the plug and the face of the insert, with the plug being rotatable to identify a selected portion of the indicia.

Abstract: A nozzle assembly for use with injection molding apparatus includes an outer sleeve having a relatively large bore extending from an open rearward end forwardly to a substantially closed forward end, and having an injection orifice therein. An inner nozzle tip is located within the sleeve, and has a radial flange and an internal extending from a rearward open end to a forward tip having a plurality of flow orifices upstream of the injection orifice. A manifold insert is located within the outer sleeve and includes a through bore in axial alignment with the bore of the nozzle tip. The manifold insert has a forward end which receives the nozzle tip and which abuts the radial flange. A coil heater is located radially between the manifold and the outer sleeve, a forward end of the coil heater seated on the radial flange. The manifold insert, nozzle tip and coil heater form a subassembly which is easily removed and reinserted vis-a-vis the outer sleeve.

Abstract: Improved disc metal mold provides an improved disc without a ring groove thereon. The improved disc metal mold has a fixed metal mold section and a movable metal mold section for forming a cavity therebetween. One of the fixed and movable metal molds has a stamper having an information signal surface on which an information signal is formed in a form of pits, wherein a fused resin is injected into the cavity to form a disc substrate having a center through hole at the center thereof. The disc metal mold includes the stamper having an center hole at a center thereof for retaining the stamper itself and a retainer for retaining the stamper to engage with the center hole of the stamper. The retainer has a slightly larger diameter at a top surface thereof than a diameter of the center hole of the stamper so that the top surface of the retainer is approximately flush with the information signal surface of the stamper by causing the top end thereof to engage with the center hole of the stamper.

Abstract: A cross-head die for applying one or more layers of coating materials to a single, longitudinally fed, filamentary member, or to a plurality of such members in spaced, side-by-side relation. Tip and die members of relatively flat, wafer-like configuration are placed in a cylindrical cavity of the body member of the apparatus with central openings in each of the tip and die members coaxially arranged and a protrusion surrounding the opening in the tip extending into the opening in the die. Flowable coating material is injected through a radial opening in the body member and flows in both directions about an annular passageway formed by cooperatively arranged grooves in the peripheries of the tip and die members. The coating material flows from the annular passageway to the die aperture through opposing, spaced, angularly arranged surfaces on the tip and die members.

Abstract: An extruder and mandrel assembly is used in a plastic pipe forming apparatus. The mandrel itself is formed from a pair of elongated tubes comprising an inner tube and an outer tube separated from the inner tube by a plastic flow path through the mandrel. The inner tube is formed by a pair of sleeves comprising an inner sleeve and an outer sleeve which is held within the mandrel by the inner sleeve. The inner sleeve is secured at its upstream end to the spider of the extruder head and the outer sleeve is secured by a releasable interlock to the inner sleeve with the releasable interlock being accessible from the downstream end of the mandrel. Therefore, the mandrel does not have to be released from the spider of the extruder head in order to remove the outer sleeve of the inner tube of the mandrel.

Abstract: In an injection blow-molding process the preform is purposely formed as a smooth walled tube closed at one end and without any thread or other cap attachment configuration about the mouth of the preform. The preform is moved to the bottle mold which completely forms the cap attachment configuration with the bottle in the blow-molding step. A processing dome is also formed from the preform in the blow-molding step to provide means to transfer the bottle to the trimmer which removes the dome. By using the smooth walled preform (without threads or any other cap fastening features), the bottle mold may utilize only a portion of the vertical height of the preform for the bottle. Bottle molds for a variety of bottle volumes and heights may employ the same preform and preform injection mold. The smooth walled preform also permits bottle molds with a variety of mouth diameters to be employed with the same preform injection mold.

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: A mold for molding or injection-molding polymer compounds, having at least one mold ancillary unit, in particular an ejector device (10), preferably an ejector pin, and/or a core pin device is distinguished by the fact that the mold ancillary device (10) has, at least over a region, a marker unit (18) in the region facing the polymer compound during the molding or injection-molding.

Abstract: A method for fabricating molded parts utilizing a plurality of mold details having respective molding surfaces defining respective contours. The method selecting a first group of the mold details and disposing the selected mold details adjacent to one another in a first predetermined spatial relationship so that the molding surfaces of the selected mold details are contiguous, to define a first molding cavity for producing a first desired molded part. A hardenable polymeric material is injected into the molding cavity and hardened to form the desired molded part. Various combinations of mold details can be assembled to produce multiple parts in a common mold frame.

Abstract: An apparatus for thermoset molding includes a first mold portion having a first rim and a second mold portion, having a second rim which substantially conforms to the first rim. The first and second mold portions form a mold cavity therebetween. An actuator mechanism is coupled to the first and second mold portions and is adapted to selectively press the first and second mold portions together. An inner seal positioned between the first and second rims and generally conforming to the first and second rims is provided to substantially seal the first and second rims when pressed together. A bridging member spans the inner seal and selectively weakens the inner seal thereby allowing air passage therepast. An injection valve is provided having a plunger which is moveable to allow resin injection or resin blow-through. Further, a mount is provided for removably attaching a clamp to a mold portion.

Abstract: To prevent an extruding material from moving in and between an extruder body and a contact surface of side guides and to provide automation of adjustment of a sheet width. A roller head extruder in which a pair of calendar rolls 8 are disposed forwardly of a material extruding opening 4 of an extruder body 1, a pair of left and right side guides 9 are disposed so that a material extruded from said extruding opening 4 is molded into a sheet form by the calendar rolls 8, wherein said side guides 9 can be automatically moved in a direction of the sheet width by a moving cylinder 19 and secured to the front surface of a flange portion 5 of the extruder body 1 by a fastening force releasable fastening means. The fastening force is added by a spring 15 and the fastening force is released by a jack 18. The fastening force urges the side guides 9 against the extruder body 1 so that no extruding material flows between the side guides 9 and the extruder body 1.

Abstract: An extrusion head includes a first housing member and second housing member each with a passageway extending therethrough, the two housing members being attached to each other such that the respective passageways are aligned. The first housing member includes structure positioned within the passageway for applying a coating material (such as PVC) to a wire as it is drawn therethrough. The second housing member includes an inlet channel adapted to be attached to a source of nylon, the inlet channel extending to a recessed groove in the end of the second housing member, which end is adjacent to the first housing member, such groove surrounding a surface configured to form a spacing between the two housing members through which spacing the nylon passes in a direction toward the wire as it is drawn therethrough.

Abstract: A screw-type extruding machine includes a housing; a driveable shaft disposed inside the housing and including a rotational moment transfer element; and at least one screw element. The screw element has two ends and defines a longitudinal groove therein for receiving the rotational moment transfer element of the shaft, the shaft thereby transferring its rotational moment to the screw element. The groove is configured such that it defines two expansion regions, each expansion region having an axial extent, the groove having side surfaces which diverge with respect to a longitudinal axis of the groove along the axial extent of each expansion region in a direction toward a corresponding one of the two ends of the screw elements, a width of the groove thereby increasing in a direction toward its two ends along each expansion region.

Abstract: A core tube or tip holder for positioning in the axial bore of the body of cross-head die apparatus through which a wire, or the like, is drawn as a layer of flowable coating material is applied thereto. The coating material is injected through a radial bore in the body which communicates with the axial bore at a position aligned with a first annular groove in the external surface of the core tube. The first annular groove extends between opposite ends partially around the core tube. A second annular groove extends fully around the core tube. The second annular groove is positioned between the first groove and the front end of the core tube. The first and second annular grooves communicate with one another via a pair of axial grooves extending between the second annular groove and the opposite ends of the first groove. The first annular groove and axial grooves are bounded on all sides by external surface portions which lie in a uniformly tapering, conical plane.

Abstract: The accumulator of an extrusion blow molding machine is constructed so that the programming cylinder and die adjustment rod have axially aligned bores to receive a die pin retaining rod. The retaining rod holds the die pin in place by means of a lower split ring that nests inside the die pin and a lock nut combined with an upper split ring associated with the programming cylinder. When the lock nut is loosened and the upper split ring is removed, the retaining rod is moved down (while the die pin is held in place) and the lower split ring is removed. The die pin is then free to slide off the retaining rod and be removed from the accumulator head.

Abstract: The present invention provides a removable marking device for a mold which includes a substantially cylindrical outer member fitted into the mold, an axially rotatable indicator fitted into the outer member and indications formed on top surfaces of the outer member and the indicator which is formed by an indication portion facing an inner surface of the mold and a screw portion extended from the indication portion, the outer member having a three-stepped bore which has an upper bore portion, a middle bore portion extending from the upper bore portion of a cross-sectional dimension larger than that of the upper bore portion and a lower bore portion extending from the middle bore portion of a cross-sectional dimension larger than that of the middle bore portion, the indicator inserted into the bore with the indication portion arranged in the upper bore portion and the screw portion arranged into the middle bore portion, a cover member inserted to the lower bore portion and clinging to the outer member, a nut th

Abstract: A guide block assembly is provided for retaining a plurality of fiber bore forming pins and at least one guide bore forming pin in precise relation to each other during molding of a multi-fiber ferrule used in a multi-fiber connector. The assembly includes an array of fiber bore blocks each with a fiber bore therethrough to retain a respective one of the fiber bore forming pins. At least one guide bore block that defines a guide bore for retaining a guide bore forming pin is assembled with the array of fiber bore blocks. Adjoining surfaces are defined between adjacent fiber bore blocks and between the guide bore blocks and the array fiber bore blocks. The use of bores more precisely retains the pins during the molding process, and the use of blocks with adjoining surfaces allows for the machining of such surfaces to precisely establish the relationships between successive fiber bore blocks and between the array of fiber bore blocks and the guide bore blocks.

Abstract: An electric mold clamping mechanism containing a pair of clamping members is activated by an electric motor. The electric motor operates a threaded piston with acme threads which in turn operate a drive plate to extend and retract the clamping members. The clamping members are used to hold a mold plate in an injection molding machine. The clamping members are pivotally attached to a drive plate mechanism and have a surface which mates with a wedge cam to force the clamping member against the mold plate. The stroke of the clamping mechanism is regulated by an amperage draw on the electric motor. A limit switch is used to terminate the end of the retracting stroke. An indicator light is used to indicate the clamping position of the device.

Abstract: An extruder projects through a bulkhead adapted to form part of a vacuum chamber, and a die is mounted on the end of the extruder within the bulkhead. The extruder projects through a gland seal which is formed in a sleeve surrounding the extruder. The seal includes a plurality of seal rings surrounding the extruder and packed in the sleeve and held in place in a preferred from by a yieldable retainer. A shaper is positioned downstream of the die and is clamped to the upstream end of the die. The shaper is mounted on tracks on a girder extending from the bulkhead clear of its periphery. The apparatus permits congruent axial movement of the extruder, die and shaper with respect to the bulkhead.

Abstract: A reconfigurable injection mold machine (10) having a fixed mold body (60, 60') and two movable mold bodies (62, 62' and 64, 64') that can be automatically repositioned with respect to each other to make different mold cavities for molding different parts. The three mold bodies (60,60', 62,62' and 64,64') each include a laminate subassembly (140,140', 142,142', 144,144') composed of a plurality of laminates (162,162', 164,164', 204,204', 234,234') and a mounting frame (146,146', 192,192', 218,218') arranged to hold and position the laminates during assembly to the mold. The mounting frame permits preassembly of the laminates on the workbench into a subassembly (140,140', 142,142', 144,144') that is then easily inserted into an opening in the mold (60,60', 62,62' and 64,64') and secured in place.

Abstract: A fixed split mold and a movable split mold are clamped with each other to define a cavity for molding an optical disk. An annular tapered unit of the fixed mold includes a flange member and a tapered member threadably engaged with the flange member and having a tapered outer peripheral surface. The movable mold includes a base member and a tapered flange member having a tapered inner peripheral surface having an inclination equivalent to that of the tapered outer peripheral surface. After the fixed mold and movable mold are clamped to align the first and second molds, the mold assembly is mounted on and secured to a molding machine. Then, the bolts and nuts are removed and the tapered member is detached. Subsequent successive closing and opening operations of the mold assembly for molding operations do not cause any unevenness of the depth of the cavity, thereby obtaining a uniform thickness in the products which are also free from birefringence.

Abstract: An apparatus for molding a connector includes a stationary body, a moving body, a first and a second blocks detachably fixed to the moving body, and a core block having at least one core. The first block has at least one hole and the second block has at least one through-hole corresponding to the first hole. When the molding apparatus is closed, the stationary body, the moving body, and the first and the second blocks cooperate to define a cavity which will be filled with a molten plastic material and a leading end of the core fits through the through-hole of the second block and into the hole of the first block.

Abstract: A parison extrusion head includes a cylindrical body, a programing rod in the body, a die pin on the end of the rod, and a die ring mounted on the end of the body by a clamp assembly having a pair of clamp arms which are connected to the body by hinges and are rotated between a closed position holding the die ring on the body an open position permitting free removal of the die ring. The clamp arms carry bolts used to move the die ring laterally and adjust the thickness of the extruded parison.

Abstract: In a disc molding die, a stationary base plate is attached to a stationary platen, and a stationary mirror-surface plate is attached to the stationary base plate. Further, a movable base plate is attached to a movable platen, and a movable mirror-surface plate is attached to the movable base plate. A stationary guide ring is attached to the stationary base plate so as to surround the stationary mirror-surface plate, while a movable guide ring is attached to the movable base plate so as to surround the movable mirror-surface plate. When the die is clamped, the movable guide ring is brought into contact with the stationary guide ring. A cavity ring is detachably attached to one of the stationary and movable mirror-surface plates such that the cavity ring projects toward the other of the stationary and movable mirror-surface plates.

Abstract: Mold clamping apparatus (30) for selectively detachably securing a lower mold plate (20) mounting a lower mold section (M) relative to the lower platen (21), lower bolster (22) and lower housing (12) of a tire curing press (10) comprising, a plurality of bores (21', 22', 12') extending through the lower platen, the lower bolster and the lower housing, a tapered bore (71) in the lower mold plate, a locking rod (31) positioned in each of the bores and extending into the tapered bore, a contractible member (40) affixed to the lower platen and extending into the tapered bore when the lower mold plate is seated on the lower platen, a jam nut (33) mounted on the locking rod movable into and out of engagement with the contractible member, and a biasing assembly 55 urging the jam nut into contact with the contractible member for locking the contractible member in the tapered bore to secure the lower mold plate to the lower platen.

Abstract: An apparatus for simultaneously casting a large volume of wax patterns in a reduced amount of time in an air-free environment. The invention utilizes a direct controlled pressure wax injection system to inject melted wax into a central portion of a multi-cavity rubber mold having an upper and lower portion, and then provides an evenly distributed clamping pressure to the mold.

Abstract: An extrusion die for foam sheet including a die body defining a manifold for conducting a split stream of heated and pressurized foamable thermoplastic melt through separate distribution channels to a die terminus. A pair of mating die lips are arranged on opposed sides of the melt and are constructed to adjustably slide toward and away from each other to vary the flow of a melt. The lips are each mounted to slide along an axis which is tilted rearwardly at an acute angle relative to an orthogonal to the sheet being formed. The mandrel is configured and adapted for quick withdrawal and replacement from an end of the die through a passageway extending through the die transverse to the direction of extrusion of a sheet.

Abstract: An apparatus for holding a stamper plate in a molding metal die is provided which comprises a cavity plate having a cavity center hole, a stamper plate press member having a flange portion larger than the stamper plate center hole, a vacuum evacuation device, a compressed air supply device, a first connecting device for connecting the cavity center hole to the vacuum evacuation device, and a second connecting device for connecting the cavity center hole to the compressed air supply device. The stamper plate is mounted by inserting the stamper plate press member within the cavity center hole and the stamper plate center hole, such that the flange portion is engaged on the upper surface of the stamper plate and a space is formed between the stamper plate press member and the cavity center hole. The vacuum evacuation device is then connected to the cavity center hole through the first connecting device, so that the stamper plate press member is sucked into the cavity center hole.

Abstract: A coextrusion die includes a plurality of thin annular disks stacked on top of each other. Each annular disk includes a plurality of openings aligned with openings in the adjacent disk, thus forming multiple streams. Plastic melt may be supplied to the die coplanarly. Stacks of annular disks may be used to form modules through which plastic melt can be axially directed.

Abstract: A die assembly fitted to the outlet of an extruder includes a die head for discharging thermoplastics melted in the extruder. The die head (7) is mounted longitudinally displaceably, transversely with respect to the polymer flow, in a rail guide of an intermediate plate (4) arranged between outlet of the extruder and die head (7) and can be removed from the intermediate plate (4) by longitudinal displacing. The die head (7) is supported on the intermediate plate (4) by sealing surfaces (8, 11), against which the die head (7) can be pressed by a screw coupling (10), the loosening of which makes possible the longitudinal displaceability of the die head (7).

Abstract: An apparatus for guiding and aligning fixed side and movable side disk cavity plates of disk injection molding dies of an injection molding device is provided with a plurality of first grooves formed on the outer surface of the fixed side disk cavity plate and a plurality of second grooves formed on the outer surface of the movable side disk cavity plate, wherein each of the first grooves and second grooves form a pair of aligned grooves parallel to the center axes of the fixed and movable side disk cavity plates. The apparatus further comprises a plurality of guide blocks fixed to one groove of a pair of aligned grooves and engaged with the other groove of the pair.

Abstract: A cassette mold holder (7) has a cassette mold insertion portion (12) into which a cassette mold (14) is inserted from above. The insertion portion (12) is inclined with respect to a vertical line (VL) by about 6.degree. when the holder (7) is attached to an injection molding machine. An insertion port (121) of the insertion portion (12) is large, and the inside surfaces (12b, 12c) adjacent to the insertion port have tapered surfaces (12d, 12e) respectively to guide the cassette mold into the insertion hollow portion. Since the insertion portion (12) is inclined, when the cassette mold (14) is inserted, one of the inside surfaces (12b) and the bottom (122) function as reference surfaces to position the cassette mold automatically. Further, the cassette mold (14) can be inserted easily along the tapered surfaces (12d, 12e).

Abstract: A selectively, rotatably adjustable riser pin for aligning a predetermined characteristic on an asymmetrical mold surface with the gate of an injection molding machine for enhanced flow dynamics of the mold material across the mold surface. The riser pin is divided into two co-linear portions which are biased towards one another such that application of a predetermined torque will allow the front riser pin portion, which carries the mold tool, to be rotated independently of the back riser pin portion.

Abstract: An extrusion head having a stationary part fixed on an extrusion installation having a plurality of extrusion cylinders supplying an extrudate formed from several components. The stationary part has extrudate flow channels each in communication with a respective extrusion cylinder and a common extrusion die. Two pivotable outer parts pivotally hinged on the stationary part are selectively swingable individually between open and closed positions by respective piston-cylinder units. The two outer parts define an extrusion orifice for the die in their closed position. A pair of locking piston-cylinders provided with hammerhead piston rods hold the respective outer parts clamped against the stationary during an extrusion. Actuator piston-cylinder units selectively swing the piston rods of the locking piston-cylinder units clear of the outer parts for opening them for cleaning extrudate channels or for an extrusion die change.

Abstract: A mold for molding an optical disk including a pair of mold halves which cooperate to form a mold cavity for forming the optical disk, an annular plate-like stamper and a stamper holding member. One of the pair of mold halves has an annular recess in a radially inner portion thereof. The stamper has a center hole and is positioned in the mold cavity. The stamper holding member is removably accommodated in the annular recess for supporting the stamper at an inner peripheral portion. The stamper holding member includes a first ring member having an annular collar portion extending radially outwardly from an axial end of the first ring member, and a second ring member removably fitted on an axial end portion of the first ring member. The stamper is positioned such that the inner peripheral portion is interposed between the annular collar portion of the first ring member and an inner portion of the second ring member.

Abstract: An extrusion die is disclosed including a first member having a surface which includes a plurality of spiral channel segments formed therein and a second member having a surface which includes a plurality of spiral channel segments formed therein. The surfaces of the first and second members are positioned with respect to each other to form a leakage gap therebetween, wherein the spiral channel segments of the first and second members are mated to form a plurality of discrete spiral channels having spiral centerlines which serpentine back and forth across the leakage gap. A spiral channel is formed by a spiral channel segment in the first member aligned with a spiral channel segment in the second member, where the depths of the respective spiral channel segments are substantially 90.degree. out of phase.

Abstract: A mold assembly for injection molding including a female mold having a first pair of opposite inside walls and a second pair of opposite inside walls disposed at four sides and defining a trapezoidal cavitys two trapezoidal locating plates respectively fastened to the first pair of opposite inside walls inside the female mold, and defining two symmetrical pairs of sliding ways within the female mold at different elevations between the trapezoidal locating plates and the second pair of opposite inside walls, and a mold set fitting the trapezoidal cavity of the mold set, the female mold consisting of a left mold half and a right mold half detachably abutted together, each mold half having two sliding tongues at different elevations and slidably fitted into the sliding ways.

Abstract: An annular co-extrusion die for extruding multi-layer tubular plastic film has inner die members stacked one upon another. The inner die members have radially outwardly extending surfaces forming radially outwardly extending helical passages between respective pairs of die members. An annular outer die member surrounds the stacked inner die members and forms a longitudinally extending annular passage therebetween for conveying plastic material from the radially outwardly extending helical passages to an annular extrusion orifice. Each inner die member forms with an adjacent die member a first feed passage extending at least partly around the inner die member radially inwardly of the helical passages, the inner die member and the adjacent die member having a circumferentially extending clearance therebetween to enable plastic material fed into the first feed passage to pass through the clearance into the helical passages.

Abstract: A center position device for a mold includes an outer housing, and an inner housing. An annular permanent magnet is fitted in the inner housing and covered by a disc secured with washers to close up flat an open lower side of the outer housing. The plural annular magnetic bands are formed in the lower side to be attracted to a mold. The outer housing has a center tubular wall for engaging a sleeve tubular bolt, and a headless tubular bolt engaging in a female threaded hole of the sleeve bolt. A correct pin is fitted in a lower center hole of the headless bolt. A wrench screws the headless bolt to move the correct pin to protrude in an injecting hole of the mold so that after the device is fitted in a threaded rod hole of an injecting machine, the injecting injecting hole of the mold is correctly aligned to the injecting hole of a threaded rod of the machine.

Abstract: An injection-molding assembly has a fixed mold plate carrying a centering ring, a fixed mold half carrying a centering ring snugly interfitted with the fixed-plate centering ring, a movable mold plate carrying a centering ring, and a movable mold half carrying a centering ring snugly interfitted with the movable-plate centering ring. One of the rings is formed of an outer ring part having a substantially circular outer periphery and a substantially circular inner periphery and of an inner ring part having a substantially circular outer periphery and a Substantially circular inner periphery. The outer periphery of one of the ring parts has a center of curvature offset radially from a center of curvature of the respective inner periphery. The annular parts can be angularly displaced and can be clamped relative to each other.

Abstract: The double tapered die mount defines a channel to support the die shoulder. No contact occurs between the die and die housing. The die shoulder is machined to be in generally congruent relationship with the channel shape of the die mount of the invention. In the prior art, the die shoulder is perpendicular to both the inner radial surface and the outer radial surface of the die mount. In the preferred embodiment, the die shoulder is tapered from the inner radial surface toward the die edge to define an inner die taper. The die shoulder also tapers from the outer radial surface to the die edge to define an outer die taper. The side walls of the channel defined by the die mount of the invention taper inwardly to be congruent with tapered surfaces of the die shoulder. The inner channel wall, i.e., the channel wall closer to the axis of rotation of the die, contacts the inner die taper. The outer channel wall, i.e., the channel wall farther from the axis of rotation of the die, contacts the outer die taper.

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: An injection molding machine equipped with an assembly for vibration processing which efficiently performs processing operations on the resin in the mold with vibration overcomes the restriction of vibration frequency due to the limited response of return springs and due to vibration transfer loss from the vibratory rods to the vibratory plate when operating at a high frequency. The injection molding machine performs both vibration and ejection without an ejector plate by making the vibratory plate serve a dual purpose and thus enable reduction in both mold size and production cost.

Abstract: A composite insulator having a core member and a housing member integrally arranged around the core member, the housing member being constructed by a trunk portion and a shed portion, has a creepable distance extending means arranged on a lower plane of the shed portion. Moreover, a segment used for producing the composite insulator has a pair of segment molds detachably connected at a partition plane having a through-hole at its center portion 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; and a partition for forming the creepage distance extending means arranged at the lower plane forming portion.

Abstract: A method for assembling a substantial barrier to the flow of liquid in a circumferentially-extending liquid conduit groove of a mold insert includes forming recesses or undercuts by undercutting the sidewalls of the liquid conduit groove, inserting a plate-like liquid dam within the liquid conduit groove, and clamping the dam in the liquid conduit groove by the use of a pair of locking screws or pins that extend through bores in the dam into engagement with inwardly-facing surfaces of the undercuts. The relationship between the inwardly-facing undercut surfaces and the locking members is preferably such that there is a progressively increasing interfering engagement of the locking members with the undercut surfaces resulting in increasing clamping pressures applied to the dam assemblies.

Abstract: This invention concerns a device used in the process of manufacturing an automobile pane 1 equipped with a polymer frame 52 placed on the edge of the pane 1. The frame 52 is extruded onto the pane 1 which can be moved by means of a suitable support in such a way that the edge of the pane travels through a recess in an extrusion head 25 and 40. The recess of the extrusion head 40 preferably includes a U-shaped jaw 41 straddling the edge of the pane. At the front extremity of the two half-jaws of the U-shaped jaw 41 there are disposed sealing ledges or shoes 42 and 43 which are movable perpendicularly to the surfaces of the pane and which, during extrusion, bear upon the surfaces of the pane. Alternatively, the extrusion head can include a fixed jaw where the sealing ledges or shoes slideably and sealingly contact the plate.

Abstract: An electric mold clamping mechanism containing a pair of clamping members is activated by an electric motor. The electric motor operates a threaded piston with acme threads which in turn operate a drive plate to extend and retract the clamping members. The clamping members are used to hold a mold plate in an injection molding machine. The clamping members are pivotally attached to a drive plate mechanism and have a surface which mates with a wedge cam to force the clamping member against the mold plate. The stroke of the clamping mechanism is regulated by an amperage draw on the electric motor. A limit switch is used to terminate the end of the retracting stroke. An indicator light is used to indicate the clamping position of the device.

Abstract: Concrete-molding machine having a ram on which an upper mold part is fastened in a releasable manner. The quick-fastening device used for this purpose comprises connecting pins which have a shank and a widened cross-piece. In order to simplify the device, the connecting pins are fastened on the upper mold part by means of their shanks. Located on the ram or on a carrying plate fixedly connected thereto is a horizontal slide with keyhole-like clearances into which the connecting pins can be inserted from beneath. Pneumatic lifting elements grip below the slide and draw it up, in the connecting position, to the cross-pieces.

Abstract: The single tapered die mount employs a radially inner surface at an angle to the axis of rotation of the die mount, die and die holder. The radially inner surface of the die mount acts on an annular shoulder of the die to support and position the die in the die holder. The die mount of the invention is located between the radially outer surface of the die and the extended lip of the die housing. In the preferred embodiment of the invention, the radially inner surface of the die mount in contact with the radially outer surface of the die shoulder has an angle of a modified Morse taper. The radially outer surface of the die shoulder is machined to a matching angle.