Abstract: A bucket-shaped container having a rim opening smaller than the diameter of the side wall thereof is injected molded from thermoplastic material using a die set including a molding core which collapses to allow axial removal of the molded container from the mold. The molding core comprises a plurality of individual, wedge-shaped outer core sections which collectively form a continuous molding surface and are slideably mounted on a tapered inner core to allow axial sliding movement of the outer core section relative to the inner core. The sliding movement of the outer core sections on the inner core is provided by a plurality of keylocks which are fixedly secured in corresponding axial keyways in the inner core and which slideably engage corresponding axial keyways in the outer core sections.

Abstract: A mold for making a bucket having a pivoted handle. The mold has cooperating mold parts defining cavities for molding a bucket and slotted bail retention means. The mold parts are movable only linearly to release the molded product.

Abstract: An injection mold utilizes a collapsible core portion which includes a core portion and a mold cavity portion. A core base is provided as part of the core portion. A first mold ring is positioned about the core base and longitudinally movable to define a first annular parting line between the core base and first mold ring. The first mold ring carries outer core members and controls their longitudinal positioning along the core base while permitting them to move radially inwardly and outwardly between molding and collapsed positions. A second mold ring is carried on the core and includes stripper ring means, the second mold ring being longitudinally movable to define a second annular parting line with the first mold ring. The second mold ring also forms a third, annular parting line with the mold cavity portion. Means are provided for relatively moving the core base, mold cavity portion, and first and second mold rings in a longitudinal direction relative to each other and the mold cavity portion.

Abstract: In order to mold a plurality of articles (20--20) which are disposed in a line, a molding arrangement in an apparatus (60) includes a plurality of cavities (109--109) which are spaced equidistantly from an infeed sprue (131). A primary network of a distribution system (50) through which an injection molding material is flowed from the infeed sprue to cavity gates (151--151) is disposed substantially along a vertical plane (150). Afterwards the injection molding material which has been flowed from the primary network and along a secondary network into the cavities is solidified. Then the primary network is exposed by causing wedge blocks (79--79) to be disengaged from each other and from an adjacent stationary platen (62) and cavity plate (90) by movement of each block in a direction transverse to the plane.

Abstract: A mold for forming a plastic cap and removing a cap from such a mold. The mold comprises 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 single-piece, injection molded rack for holding test tubes or similar articles and a mold for producing the same. In a preferred three-tiered form, the intermediate tier is a lattice defined by the intersection of two superposed sets of parallel bars. These two sets of bars are formed by two pairs of correspondingly channeled slides that cooperatively engage to form a portion of the mold cavity corresponding to the lattice. The channels in each set of slides are aligned with the path of movement of the slides to permit their sliding, uniaxial movement relative to the molded bars. To further enable this sliding movement between mold segments and the molded rack, the connecting supports between the top tier and the intermediate tier are provided on the sides of the rack, while the connecting supports between the intermediate tier and the bottom tier are provided on the front and rear of the rack.

Abstract: A multipart mold assembly for removably receiving a casing unit and positioning the casing so as to form, in combination with at least one of the mold parts, a cavity having the shape of an element to be formed in the mold and bonded to the casing. One mold part has a surface defining part of the shape of said cavity, and a casing skirt support surface forms another part of the cavity. A flash barrier is formed along a part of the skirt casing when a clamping ring formed from a plurality of individual clamping ring elements engages the surface of said casing skirt and urges it into fluid-tight relation with the casing support surface.

Abstract: A mold assembly for producing a plastic container having internal compartments separated by partitions. A male mold is slidably moveable into a female mold and includes a plurality of upstanding cores to form the container with injectors provided to force plastic melt between the molds and between the cores. A plurality of side locking members are reciprocably mounted in the cores and when extended contact adjacent cores limiting relative motion therebetween. The locking members form holes in the partitions formed between the cores. The locking members are withdrawn only after the plastic melt is cooled.

Abstract: A container mold comprising a mold cavity portion and a mold core portion with the cavity and core portions being relatively moveable between a closed and an open position. By this invention, means are provided for molding a recess-defining flange in the container.

Abstract: Novel and improved means for retaining an indicia forming member on a tire mold. The structure for accomplishing this involves a latch mechanism which is operable both to selectively latch the indicia forming member to the mold and to assist in the ready removal of the member from the tire mold.

Abstract: A collapsible mold core having plural can actuated members surrounding a conical central core member, the members surrounding the central core member having slidable pins connecting adjacent members and molding apparatus including the core.

Abstract: A method and apparatus for forming belt sleeves having grooves provided in either or both of the inner and outer surfaces thereof. The manufacture includes the provision of a preform laminate on an inner mold and the forcible urging of a constrictable outer mold radially against the laminate at elevated temperatures so as to effect curing of the rubber of the laminate in accurate conformity to the grooved configuration of the inner and outer molds. The entire assembly is carried on a central support post. Pressure plates are provided for urging the constrictable outer mold radially inwardly as the result of threaded advance of nuts on the central post. The grooves in the mold surfaces may selectively be arranged to extend parallel or circumferentially of the central axis of the post as desired to form either longitudinally or transversely extending ribs, grooves, etc., in the formed sleeve belt.

Abstract: An injection molding mold including a collet-like mold member for shaping undercut portions of the molded article.

Abstract: A mold defining a mold cavity for manufacture of an article, the mold comprising a plurality of mold side wall members, each of the side wall members including opposite end portions and including an inwardly facing surface comprising a mold surface for forming at least a portion of a side wall of the molded article. The side wall members are moveable from a closed position wherein the side wall members cooperate with said first and second end wall members to define a mold cavity conforming to at least a portion of the desired exterior dimensions of the article, and an open position in which each of the side wall members is displaced laterally outwardly of its closed position and away from the end wall members to a location in spaced relation from the end wall members.

Abstract: A method for molding elongated workpieces wherein the mold is comprised of three vertically oriented quadrants and a fourth quadrant pivotally mounted relative to the three quadrants between a mold open position and a generally vertically oriented mold closed position. A workpiece is loaded into the mold by positioning end plates on the workpiece and locating the combination on the fourth quadrant by positioning of the end plates on locating pins projecting from a frame member or tilt beam associated with the fourth quadrant. Slide assemblies are then moved into workpiece engaging positions on each end of the workpiece to accurately locate the workpiece relative to the fourth quadrant. The fourth quadrant with the workpiece locked thereon is then moved into a mold closed position for molding.

Abstract: The following specification describes a stop boss formed on the handle of a pail by means of a pair of slides located behind a skirt wall of the pail with the handle passing through a slot in the skirt wall, which is closed by a flange wall formed by the slides. The slides are movably carried in guides by a ring member and are received in a recess of another ring member which conventionally forms the annular pail wall. The guides enable the slides to move laterally toward each other in response to downward movement of the carrying ring member, to define the cavities for forming the stop boss and the flange wall closing the skirt wall slot. On completion of the mold cycle and upward movement of the ring member carrying the slides, the guides move the slides laterally apart to release the stop boss and the flange wall. The slides are then moved from between the skirt and pail walls to enable the pail to be released from the mold.

Abstract: A molding method and apparatus in which an insert part is supported in a mold cavity by a pin. The pin is withdrawn when the resin pressure in the mold exceeds a predetermined value.

Abstract: This invention concerns a metal mold for the manufacture of a vulcanized reinforced hose by the compression and vulcanization of an unvulcanized hose in the cavity of the metal mold. This metal mold comprises a movable piece, a stationary piece, and a pair of inner pieces disposed between the movable piece and the stationary piece. The movable piece, the stationary piece, and the pair of inner pieces are severally provided at the inner sides thereof with depressions corresponding to the four equal parts into which the inner surface of the cavity of the metal mold is radially divided so that when the metal mold is closed, the pair of inner pieces are synchronously moved with the movable piece and the stationary piece in the direction of compressing the unvulcanized hose.

Abstract: A machine for crimping tire bead rings in which an inner die member has grooves for holding the bead rings in the area of the bead splices and an upper die member engages the outer surface of the bead rings in that area. The die members are compressed with sufficient force for a sufficient period of time so that the strands of the bead rings are held together by the insulating material around the strands in the area of the bead splices. The side portions of the grooves control the spreading of the bead rings and may be flared to compress and then release the bead rings. The grooves of the inner die member may have movable inserts for ejecting the bead rings. The upper die member may also include grooves in mating engagement with the grooves of the inner die member for enclosing the outer portions of the bead rings at the splice area and provide for release of the bead rings after crimping.

Abstract: Provided is a method and apparatus for molding and winding in a continuous operation a string of molded items. The molded items of the string or chain are molded in spaced relationship to one another and are connected by molded scrap connectors. The string of molded items is then advanced until only a trailing connector of the last molded item extends into the mold cavity. Upon subsequent molding operation, therefore, the subsequent molded item is molded integral with the existing string of molded items. The continuous string of molded items is kept under constant tension and wound periodically into a coil. The molding, advancing, tensioning and winding operations are all integrated and synchronized in order to provide a wound package which greatly facilitates its use in an automatic assembly operation.

Abstract: A detabber apparatus is disclosed for use with a blow molding machine for removing a tab forming at an end of a blow molded object. The detabber apparatus features a jaw mounted on a movable support of a carriage for movement between a first operative tab engaged position and a second remote tab stripped position. Power operating means is drivingly connected to the movable support of the carriage for moving the jaw between said first and second positions. The jaw movement is provided along a generally straight line path defined by a cam and cam follower means operatively mounted in the carriage. The carriage incorporates isolated lubrication passageways for the carriage cam and cam follower means in remote isolated relation to the object to be molded.

Abstract: A bucket shaped container having a rim opening smaller than the diameter of the sidewall thereof is injection molded from thermoplastic material using a die set including a molding core which collapses to allow axial removal of the molded container from the mold. The molding core comprises a plurality of individual, wedge shaped outer core sections which collectively form a continuous molding surface and are slidably mounted on a tapered inner core to allow axial sliding movement of the outer core sections relative to the inner core. Each of the outer core sections is also mounted for radial sliding movement on a mounting plate which circumscribes the molding core and is mounted for reciprocating axial movement relative to the inner core. Reciprocation of the mounting plate produces simultaneous axial and radial movement of the outer core sections throughout their entire lengths between an expanded molding position and a collapsed container releasing position.

Abstract: In a metal mold for molding a hollow product having inwardly tapered side wall with a stationary die plate for forming a bottom portion of the product, a core, and a cavity plate surrounding the core, the core has a truncated pyramid shape and first and second slide cores are provided between the core and the cavity plate. The core and slide cores are constructed such that at the time of opening the mold both slide cores are moved inwardly in an interlocked relation with retractive movement of the core thus leaving one end of the molded product for enabling removal thereof.

Abstract: A means and method are provided for straightening and locking an elongated cantilevered mold core into molding alignment before injecting a molding composition into a cavity for a deep, thin-walled container. In a preferred embodiment a core locking cam means is rotatably retained in the base of a mold. A stationary complementary cam reacting means is located in the free end of the core. The core is locked by telescoping the cam means into the reacting means and rotating the cam means to bring it into locking engagement with the core end.

Abstract: A method and apparatus for making a self-coiling sheet. The apparatus includes a work station at which a relatively short section of a sheet of flexible material, e.g., crystalline polyethylene terephthalate, is folded upon the remainder of the sheet. The sheet is then advanced onto the carrier plate which, in turn, is mounted for movement toward and away from a gap defined by a pair of superposed pressure-applying rollers. The carrier plate is adapted to deposit the sheet between the rollers such that the folded section of the sheet is located in engagement with one of the rollers and the underlying portion of the sheet is in engagement with the other roller. The rollers are rotated in the same direction so as to drive the folded section of the sheet toward the carrier plate while simultaneously driving the remainder of the sheet in the opposite direction. This action results in the sheet being ejected from the gap of the rollers as a multi-layered generally cylindrical coil having a permanent set.

Abstract: A mold assembly is described for molding smooth-bottomed battery cases in which the necessary compression locking of the free ends of the elongated cantilever mounted cores is achieved by providing transverse locking pins which are carried within, and actuated to extend from, the interior of the cores themselves. Since no locking pins extend from the cavity, the interior surface of the base wall of the battery case is formed relatively smooth and flat.

Abstract: This disclosure relates to a hydraulically operated mechanism which releases precast concrete products, such as precast septic tanks, burial vaults, steps, and like precast concrete products from the mold in which they are cast, the mold including a base, an inner mold core and an outer surrounding mold shell, and the release mechanism being carried by the base and including at least one movable portion which defines a part of the mold cavity, a rod secured to the mold cavity portion, cam means for imparting motion to the rod which in turn moves the mold cavity portion whereby a precast product is moved and thus released from the associated mold cavity, and means for rotating the cam means to impart the motion to the rod with the latter being preferably, though not necessarily, hydraulically actuated.

Abstract: Disclosed herein is a radially parted mold comprising a plurality of mold segments each having cavities that taken together define the shape of a propeller with a tapered hub when the mold segments are joined together along their parting surfaces. The parting surfaces include parting lines which run along the edge of the propeller blade. The edge of the propeller blade is the centerline of the blade (1/2 the thickness of the blade). There are the same number of mold segments as there are blades on the propeller and each mold segment has a first cavity defining the rear face of an adjacent propeller blade, a second cavity defining the rear face of an adjacent propeller blade, and a third cavity defining a portion of the propeller hub.

Abstract: A die casting unit employing plural die members and core members which are used in closed position for die casting shaped articles of unusual configuration and particularly articles which are comprised of two or more subcomponents arranged or joined in interconnected assembly, an example of such shaped article being the slider body and pull chain used on slide fasteners. Movement of at least the die members during the molding cycle is effected by rotation of a ring member carrying structure which cooperates with structure on the die members to slide the die members between their open and closed positions.

Abstract: Articulated mold for the manufacture of molded objects having opposed undercut parts comprises two dies whose parting surface passes between the opposed undercut parts of the molded object. In each die there are provided shells composed of segments which can be displaced by pushers in order to open the mold and eject the molded object.

Abstract: The disclosed invention consists of a composite mold for consolidating and conforming particulate solids into a compressed, shape-retaining mass. The mold comprises a matched pair of generally half sections, or assemblies thereof, provided with obliquely directed aligning keys whereby one half-section of the mold can recede from adjoining contact with the other in a generally oblique direction to extend the die cavity in two dimensions and thereby freely release the molded product intact, and then return to its initial position adjoining its counterpart half section for the next molding cycle. The mold construction of this invention is of particular utility in the molding of particulate inorganic magnetizable materials in the manufacture of permanent magnets of precise dimensions.

Abstract: An apparatus for molding and stretching at high speed an attachment device integrally composed of a synthetic resin and comprising a head, a cross-bar and a filament integrally connecting the head and the cross-bar to each other is disclosed. The apparatus is comprised of a fixed frame, two movable frame portions, four mold members, two cam rod members, and a cam shaft. The two movable frame members are movably connected to the fixed frame. The four mold members are positioned on the two movable frame members, the mold members being movable relative to one another. The two cam rod members are secured to the fixed frame, and the cam shaft member is mounted on one of the mold members. When the movable frame members are moved relative to the fixed frame, they cause the cam shaft to move along one of the cam rod members, thus causing two of the mold members to be pulled away from the remaining two mold members, thereby stretching the filament connecting portion of the attachment device.

Abstract: A mold apparatus is provided having a stationary injection mold block and a movable compression mold block. A female mold member is formed in the injection mold block whereas the compression mold block contains a movable male mold member so that when the injection and compression mold blocks are placed in an operative position, a mold cavity is defined by and between the female and male mold members. Means are provided to feed a shot of thermoplastic resin into the mold cavity and, at a predetermined time in the mold cycle, move the male mold member into co-acting, mating relationship within the female mold member so that the thermoplastic part obtained is produced by concurrently employing both injection and compression molding principles.

Abstract: Tool apparatus is provided for flaring the end portion of thermoplastic pipes and tubes, and includes a flaring head having a forming recess adapted to receive the pipe end portion and a cam edge portion adjacent to the recess for engaging the pipe end portion in a forming action. Mandrel means are threadedly connected with the flaring head for movement of the head toward the mandrel means about which the pipe being formed is clamped. The forming recess is defined by a frusto-conical surface inclined to the axis of the head in cooperation with an oppositely inclined surface, and the cam edge portion is defined between the frusto-conical surface and a side wall portion of the head. The diameter of the apex of the circular V intersection of the recess-defining surfaces is preferably equal to the outside diameter of the pipe.

Abstract: An apparatus for producing durable and precise wooden heads of golf clubs, in which method the air in the woody tissue of wooden head materials is firstly removed completely in vacuum, the wooden head materials are then impregnated with a synthetic resin liquid, and they are subjected to compression molding. In the compression molding, the mold pressure is exerted in the direction toward the central portions of the wooden head materials so as to give even and smooth compression effect.

Abstract: A flexible printing plate is separated from the inner surface of a curved matrix after formation of the plate in a mold by first moving the ends of the plate inwardly away from the matrix, while maintaining the center of the plate in stationary contact with the matrix, and then moving the center of the plate inwardly away from the matrix, while maintaining the ends of the plate away from the matrix. The matrix is held in an outer mold half, and the printing plate is formed in a mating inner mold half having a center section with sloping side surfaces that converge toward the outer mold half, a first end section having a side surface contiguous to one sloping side surface of the center section, and a second end section having a side surface contiguous to the other sloping side surface of the center section.

Abstract: A system for preventing a mandrel located inside a mold from deflecting during the initial stage of the injection of thermoplastic material into the volume defined by the mandrel and mold is provided. A reciprocating centering member is coupled to a supply of thermoplastic material and is coaxially positioned with respect to the free end of the mandrel. During the initial stage of injection, the force generated by the injection pressure will urge the centering member into a recess defined by the mandrel. The centering member defines a fluid flow channel permitting the thermoplastic to be injected via the channel into the volume defined by the mandrel and mold. When substantial injection has occurred, the mold back pressure and a spring bias will move the centering member out of engagement with the mandrel.

Abstract: A press for the vulcanization of tires comprising a horizontal cross-member which is mounted in a cantilever fashion at one of its ends on a support having a vertical axis, and which is able to both pivot about and to slide along the vertical axis of said support. In order to control both the pivoting and sliding movements of the horizontal cross-member, there is provided a single control means associated with guide means comprising a cam follower member and a groove forming a cam having two end portions which extend vertically and which are one another offset vertically and angularly in relation to axis of support, and an intermediate portion progressively connecting the two end portions of the groove.

Abstract: A tapered mould consisting essentially of a rigid outer frame formed of a set of radially arranged longitudinally extending guide members and a set of axially spaced encircling rings, and a gapped frustoconical tubular casing of resilient sheet material having a set of longitudinal stiffening members arranged thereon for sliding engagement with the respective guide members. The gap in the wall of the tubular casing, extending along a longitudinal line on the periphery of the casing, is opened and closed automatically as the tubular casing inserted in the outer frame is moved axially in opposite directions. Labor - consuming bolt - clamping and releasing operation is completely eliminated and the mould operation can be mechanized with ease, as desired. Packing means interposed between a pair of stiffening members arranged on the opposite sides of the gap further ensures leak - proof gap closing.

Abstract: A mold base supporting mold cavity plates for movement between open and closed positions and having an ejector mechanism movable between ejecting and retracting positions relative to one of the mold cavity plates includes an ejector retraction mechanism for moving the ejector mechanism to its retracted position relative to the one mold cavity plate before the cavity plates reach a predetermined position during the mold closing cycle and for releasably retaining the ejector mechanism in its retracted position until the mold base opens to a predetermined position.

Abstract: The specification and drawings disclose an apparatus for permitting molding of components such as turbine blade assemblies and the like without the use of complex multipart molds. The disclosed apparatus comprises first and second mold halves carried by cooperating platens for relative movement toward and away from one another along a path. A connecting assembly is provided for attaching the first mold half to its respective platen in a manner which permits it to have free movement in directions perpendicular to the path and rotary movement about an axis parallel to the path. Additionally, a control assembly is provided to cause the first mold half to undergo predetermined transverse and rotary movement during movement along the path toward and away from the second mold half.

Abstract: This disclosure relates to a retread mold assembly which includes a base and a plurality of matrix segments which are movable relative to the base and in the closed position thereof define a generally annular cavity, spring-biased guide means normally urge the matrix segments away from the base, and pin means are provided and secured to the base for quick-disconnect coupling and uncoupling of the matrix segments to the base.

Abstract: A core is provided, useful in the manufacture of closure caps, each closure cap having a top, dependent skirt and securing means, comprising intermittent or interrupted threads or hold-down lugs.

Abstract: This disclosure relates to a retread mold defined by a pair of relatively movable platens, means for imparting relative motion to the platens between spaced open and closed positions thereof, a matrix carried by each platen, biasing means between each platen and its associated matrix for biasingly urging the matrices and platens to a position of spaced relationship from each other in the open position of the platens, and the spaced relationship being reducible in opposition to the force of the biasing means upon movement of the platens to the closed position thereof.

Abstract: A pair of matched metal dies one of which moves against the other to form a mold to contain, and to apply pressure to a part and to pinch off excess material on the part. The lower die has a recess with all the sides of the recess canted outward in two steps. The upper die when inserted contacts the lower canted sides of the lower die.

Abstract: Labor-consuming bolting operation as required with conventional forms of the gapped or split type has been ingeniously expelled by the provision of a form structure comprised essentially of a rigid tubular frame, a resilient gapped tubular casing arranged therein as a form in which concrete is to be placed, and camming means arranged on the inside of the rigid frame and on the outside of the resilient casing and cooperable to act upon the resilient tubular casing radially and circumferentially thereof with axial movement of such resilient casing relative to the rigid frame so as to close the gap in the resilient casing while holding the latter in coaxial relation to the rigid frame, any loss of moisture content of concrete during centrifugal forming operation can be effectively prevented by arranging an appropriate packing element on the resilient casing along the gap therein.

Abstract: Method and Apparatus for subjecting material to extreme compression, for instance in the making of artificial diamonds. The material is enclosed within a cluster of anvils. When pressure pads converge to bear upon the clustered anvils so that they slide against each other and the cluster contracts, the material within is compressed. The reaction of each anvil with its pressure pad is directed generally towards the material to be compressed but lies out-of-parallel with the interfaces of sliding movement of that anvil with its neighbours. The pad-anvil reaction can thus be resolved into components urging each anvil into contact with its neighbours, and thus supporting the anvil against fracture due to the high compression it undergoes along the pad-specimen axis.