Abstract: A mold for forming a container is provided with an upper die, a lower die, a first semi-cylindrically shaped collar and a second semi-cylindrically shaped collar. The upper die includes a downwardly-depending central core portion which cooperates with a concentric annular lip portion and spaced outwardly from the central core portion defining a groove therebetween sized to provide a continuous neck finish on the container. The lower die is provided with a core-receiving pocket sized to receive the central core portion of the upper die. The first and second collars are disposed in abutting relation and are provided with mating surfaces having thread grooves to form a thread region of the container neck, the first and second collars being sandwiched between the upper and lower dies in a use condition.

Abstract: A mold assembly for forming a lens blank which gives a contact lens includes an upper and a lower mold half which cooperate with each other to define a substantially fluid-tight mold cavity when the two halves are assembled together. The mold cavity is filled with a monomer liquid which is polymerized to provide the lens blank that is to be subjected to a cutting operation for forming a base and a front curved surface of the contact lens. The upper mold half includes a flexible thin-walled portion which has a downwardly convex shape and which partially defines the mold cavity. The thin-walled portion is deformable to absorb expansion or shrinkage of the monomer liquid during polymerization thereof in the mold cavity. The lower mold half includes a base portion at which the lower mold half is clamped by a chuck of a lathe during the cutting operation. A mold portion of the lower mold half has a molding surface which is provided with a recess or protrusion for holding the lens blank on the lower mold half.

Abstract: A plastic cap is provided which is capable of assuring a high sealing property and is advantageous for protection of the environment because of being readily subjectable to disposal of waste or burning treatment after using a container. The plastic cap comprises a drum part covering the mouth part of a container and sealing material and a top plate positioned on a top wall of the drum part, in which the drum part has, on the inner wall thereof, a protrusion part or wedge-shaped part to be engaged with an annular protrusion on the outer periphery of the container mouth part. A window part opens at the center part of the top wall of the cap drum port, and the outer edge of the window part and the lower part of the top plate are connected through several bridged parts.

Abstract: A method and apparatus for molding a plastic washing machine basket includes a fixed mold core formed with teardrop-shaped projections spaced about a periphery thereof, cavity sidewall members spaced about the periphery of the mold core which carry core pins having tips adapted to abut teardrop-shaped projections on the mold core and a cavity cover member spaced about an end of the mold core and abutting the cavity sidewall members so as to define a cavity between the mold core and both the cavity cover member and the sidewall members.

Abstract: A method and apparatus for transferring a pre-molded film into a cavity by the following steps. A robotically controlled arm having a loader receives flexible film. The loader by two moveable end portion and a main portion there between. The pre-molded film is transferred onto the loader. The end portions are retracted so that the loader is in a retracted position. The loader is moved to a position within a cavity. The cavity has an opening that is larger then the loader when the loader is in the retracted position. The film is transferred to the cavity by aligning the film with corresponding three-dimensional contours on the cavity. The edge portions are extended so that essentially the entire surface of the film contacts the cavity. The loader is withdrawn from the cavity by first retracting the end portions and removing the loader.

Abstract: A method of making thin walled covers employing a vacuum mold assembly comprises the steps of effecting a relative movement between a thin sheet of thermoplastic material and the vacuum mold assembly sufficient to form a peripheral seal with a surface area of the sheet and thereafter applying a vacuum to the vacuum mold to draw portions of the sheet about main body forming molding surfaces of molding horns, thin marginal edge molding surfaces of the molding horns, and inturned flange molding surfaces of the molding horns so as to form a plurality of thin walled covers, each with an exterior surface presenting a substantially dimple-free class A surface. The sheet is then separated from the vacuum mold assembly.

Abstract: A mold for a cylindrical product with an inner gear formed by injection molding is disclosed. The mold includes a plurality of sets of first and second inner slide cores each having inner molds with under-cut forming portions. The first and second inner slide cores move in a direction perpendicular to a center line of the inner cores at different velocities.

Abstract: A moving mold 100 consisting of slidable housing molds 110 and 110 and retainer molds 120 and 120 and a fixed mold 200 pairing with the moving mold 100 are used to mold a housing 20 and retainers 30a and 30b in resin at the same time. When the fixed mold 200 and the moving mold 100 are opened, the housing molds 110 and 110 are opened and a space is formed between the housing 20 and the retainers 30a and 30b to be fitted to each other. The retainers 30a and 30b are pressed against the housing 20 with the retainers 30a and 30b held in the retainer molds 120 and 120 from both the left and right sides, whereby the housing 20 and the retainers 30a and 30b are assembled.

Abstract: A moldable material is injected substantially simultaneously into a mold cavity for the outer sleeve formed between an outer sleeve mold and an outer sleeve core in an injection unit and into a mold cavity for the inner sleeve formed between an inner sleeve mold and an inner sleeve core in a clamping unit of a mold. These mold cavities are connected by at least one relatively thin runner to form at least one predetermined breaking point between the rear end of the outer sleeve and the front end of the inner sleeve of a one-part applicator molding. The invention also relates to an apparatus for producing the tampon applicator according to, but not restricted to, the process as described above.

Abstract: A panel configuration and manufacturing technique are disclosed. The panel simulates a number of shingles each having a hollow end portion. Several of these panels may be utilized to provide an exterior building covering. When installed, hollow end portions of adjacent panels overlap to provide a leak resistant, realistic appearing covering. A number of panels may be formed by positioning each of a number of regions of a web of polymeric resin between a mold and a plug. Each of the regions is molded while in a ductile state to form a corresponding one of the multi-shingle panels. An undercut portion is formed in each of the regions during molding to define an end portion of the panel. This formation includes moving the plug relative to the mold. The sheet is cut after molding to separate the panels from the web.

Abstract: A molded cap for sealing a container, and having a core-profiled internal skirt portion is injection molded within a seamless annular cavity mold, wherein segmentation of the interior core die portion bearing the internal form such as a screw thread form for the inside of the cap skirt, permits its inward withdrawal clear of the cap after completion of the injection cycle. Due to the seamless mold cavity the cap has no externally visible mold witness lines along its skirt. The molded cap contracts radially as it cools within the mold, permitting molded parts and decorative features that are on or in the skirt face to withdraw radially inwardly from the mold surfaces, such that the cap can be ejected clear from the mold without damage to fine detailed or hang-up on undercuts into the mold skirt face.

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 method of making a one-piece, rigid thermoplastics body for a discrete, releasable push-in tube coupling device of the collet type comprises initially injection moulding the body about one or more rigid cores. Each rigid core is then withdrawn axially while the moulding is still in a plastic state whereby the outer, narrower bore portions of the body expand radially. The expanded portions are then radially contracted back to their as-moulded configuration using a jaw-like tool and finally the body is allowed to cool.

Abstract: A motor vehicle dashboard has a support face. Air ducts are carried by the dashboard for taking air into the cabin of the vehicle. Each duct has a longitudinal slot which is bounded by two adjacent edges, so that the duct has a transverse cross section in the form of an open annulus. The duct has two external engagement faces on either side of the longitudinal slot, and is fixed to the support face of the dashboard by means of these engagement faces. The duct is made by moulding in a suitable deformable material such that it can be stripped from the mould by opening out the slot, after which the slot is closed up again.

Abstract: Method and apparatus for forming thick wall plastic components laminated with formable decorative film layers. A thermoformable thick wall plastic sheet in the range of 0.065 to about 0.300 inches thick over at least half its area is provided having a thermoformable decorative dry film coating on one side forming an outer surface of the laminated sheet. The sheet is peripherally supported in an open center rack, heated in one or more ovens to forming temperature and formed by a combination of compression and, preferably, vacuum forming with subsequent trimming of excess material to form a finished component with a high quality finish suitable for automotive body use. The compression and vacuum forming steps may be interchangeably performed in order and provide for high quality finish on the outer surface with shaping of reentrant wall portions on the inner side. Any suitable form of laminated sheet may be formed by the apparatus and method.

Abstract: A method for manufacturing an injection molded steering wheel pad having a cover and a pocket formed between a first projection and a second hook-spaced projection, that together hold an arm of an airbag device. The pad includes a pad body and at least one pair of holding portions extending from the pad body. The holding portions have an L-shaped first recess and the steering wheel pad has a second recess located between the pad body and the holding portion. A mold includes a pair of first and second molds.

Abstract: The inventive packaging item is e.g. a tray for packing fresh meat. It has at least on its bottom part (10) grooves (11) which open towards the inside of the packaging item. The openings of these grooves are narrower than the inside part of the grooves. If the groove opening is sufficiently narrow e.g 1mm or less, unwanted liquid oozing out of the packed meat is trapped in these grooves (11) and such separated from the meat and kept out of sight of a potential buyer.

Abstract: Catheter tube 2 has a multiple of small bead-like projections 21 formed on the inner surface. The inner surface of the tube 2 comprises projections 21 and flat areas 22. A guide wire inserted into the lumen 5 of the tube 2 contacts its inner surface only at the projections 21. The catheter tube 2 has the inner surface embossed in such a way that the guide wire can be manipulated with high efficiency even if the diameter of the tube is very small.

Abstract: A mold for integrally molding a cover and a pad on a steering wheel. The mold includes a first mold and a second mold relatively movable to the first mold. The first and second molds are separated from each other to place a metal core between the first and second molds. The first and second molds are then joined with each other to define a first cavity for molding the cover. Afterwards, the first and second molds are separated from each other to remove the metal core and the cover. A float core is located between the first and second molds. The float core cooperates with the first and second molds to define a second cavity for integrally molding the pad with the cover when the first and second molds are joined with each other. A pivoting mechanism pivots the float core to remove the steering wheel from the molds.

Abstract: A method of injection molding includes the steps of providing a source of pressurized flowable material, a source of pressurized fluid, and a mold assembly actuatable from an open position to a closed position. The mold assembly includes first and second matable mold portions that define a substantially sealed cavity, an inflatable core member positioned within the substantially sealed cavity and secured to the first mold portion, a pressurized fluid path from the source of pressurized fluid through the first mold portion to the inflatable core member, and a flowable material path from the source of pressurized flowable material into the cavity. The pressurized fluid is introduced into the inflatable core member at a first pressure to provide an inflated core member that defines a core boundary and the pressurized flowable material is injected into a space defined by the cavity and the core boundary at a pressure less than the first pressure.

Abstract: A method for molding a tamper-evident closure with tabs that extend radially inward and upward. In order to produce tabs with such a configuration, the present invention employs a tab forming element having a mold surface with an inclination corresponding to the degree to which the tabs are desired to extend radially inward and upward. After the tabs have been molded in their inclined position, they are withdrawn from the mold, temporarily altering their angle of inclination. After removal of the closure from the a first portion of the mold, the tabs are returned to the original angle of inclination through contact with a second portion of the mold.

Abstract: A method of injection molding a tie that includes an abutment wall surface having at least one tooth facing a pawl that has at least one tooth inside a locking head utilizes a core that defines at least a portion of the abutment surface tooth and at least a portion of a surface of the pawl that includes the at least one pawl tooth. The core is movable in relation to a first other mold part and is separated from a second other mold part not sooner than the first other mold part is separated from the second other mold part to thereby enable (a) the pawl to flex into a space vacated by movement of the first other mold part and (b) the abutment wall to flex into a space also vacated by movement of the first other mold part during separation of the first other mold part from the second other mold part so that the tie can be removed from the mold without significantly damaging either the at least one pawl tooth or the at least one abutment surface tooth.

Abstract: A process of molding a synthetic resin screw includes upper mold members 2 and 4, lower mold members 3 and 5, and four sets of slide cores 2a, 4a, 3a and 5a supported by the respective mold members and withdrawable in directions parallel to a parting plane between the upper mold members and the lower mold members.

Abstract: A method of injection molding a container having a body and an upper opening surrounding a neck of a container produces a container in which a diameter of the body is greater than the diameter of the neck. The method includes injecting plastic or other appropriate material into a cavity of the mold assembly and, after the container material has cooled sufficiently to retain its shape, sequentially removing portions of the mold assembly from the container.

Abstract: A male member has a cylindrical core with an internal poppet that is displaced by air pressure to open an air passage for pressurized air to an end of the poppet. The female cavity and poppet form a container bottom wall. A thermoplastic copolymer polyethylene is injected into the mold at about 470.degree. F., the mold having a surface temperature of about 100.degree.-130.degree. F. and the plastic material a temperature of about 130.degree.-160.degree. F. at the time of ejection of the container from the mold. Ribs are formed at the container rim having a depth such as to cause the container to stretch about 6% when removed from the core. The ribs outer edges are coextensive with the container side wall. A lid engaging lip is formed at the container rim edge. The process has a preferred 14 second cycle time and uses a core with no draft. The mold surface is maintained at the desired temperature by a cooling water circuit in the mold.

Abstract: A staged, sequentially separated injection molding apparatus for forming a molded container closure includes a mold base portion, a plurality of concentric, separable telescopic mold elements, and an opening therein defined by one of the base portion and the mold elements for injecting a mold material into the apparatus. The elements are configured such that they can be separated or removed from the mold, from the inner most element outward, to provide sufficient free space for the newly molded part to flex inward as the mold elements are removed. The inward flexing of the part, permits ready removal of the next outwardly most mold element, while minimizing the possibility of damage to the molded part. Each of the mold elements includes a mold face, which in conjunction with the base portion, in part defines a mold cavity. The inner and outer mold elements and the intermediate mold element include flange portions opposite of their respective mold faces.

Abstract: A core lifter system for a plastic injection mold, where one or more core blades is used to not only provide an undercut in the formed molded part, but also aid in ejecting the molded part from the mold. A blade retainer for the core blade is located in a support, with the support having a semi-circular socket shaped to engage a coupling end of the blade retainer. The blade retainer is immobily secured in the socket at a desired angle of inclination relative to the support.

Abstract: A plastic molded part having a parting line free O-ring groove formed on a tubular portion of the part is made by molding the groove utilizing cooperating inner and outer axially moveable die portions in which an inner die member is withdrawn from the tubular plastic just before the outer die member is withdrawn, with the withdrawal of the members occurring after the plastic has begun to set but before it has assumed its final cure, whereby the plastic may flex inwardly as the outer die is withdrawn and then may spring back outwardly to its proper position for final cure.

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, mold article therein. A movable, rotatable stripper ring is provided over the core, and means 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. A process for forming a threaded, molded plastic article is disclosed including molding the article in an injection mold and removing the article from the mold by rotating a rotatable and movable unscrewing means to rotate and remove the article from the mold core.

Abstract: A mold assembly includes first and second housings having generally curved surfaces inside the mold cavity. The first housing has apertures extending therethrough. The second housing may have apertures, axially aligned with the apertures of the first housing, extending partially or completely therethrough. At least one guided, flexible, elongated rod member is configured for reception in the apertures of the first and second housings, the rod members being movable in a direction non-parallel to a direction of movement of the mold assembly with respect to the rod members. The mold-assembly is particularly useful for forming a molded body having a plurality of apertures, aligned in arbitrary non-parallel directions relative to one another, extending therethrough.

Abstract: A method of manufacturing the cylindrical product includes the steps of inserting a first cylindrical mold into a hole at the center of a second cylindrical mold and engaging a toothed portion on the first cylindrical mold with a spiral groove on the second cylindrical mold to provide a lower mold. Further, an upper mold is mounted thereon to form a space for forming the cylindrical product and molten resin material is injected into the space to harden therein. The second cylindrical mold is withdrawn in a direction to allow the mold to be opened, the first cylindrical mold is axially moved to insert the toothed portion into a relief groove on a flat portion of the second cylindrical mold, the first cylindrical mold is rotated in a direction to withdraw it along the flat portion, the upper mold is rotated to extract the cylindrical product.

Abstract: An apparatus for forming a moulded article includes a stationary mould core with an external threaded surface. A female mould surrounds a portion of the mould core including the threaded surface in a mould closed condition to define a mould cavity between the mould core and the female mould. Molten plastic is injected into the mould cavity to form the moulded article. A rotatable sleeve surrounds the mould core and engages with the moulded article formed in the mould cavity. The sleeve carries a gear wheel which meshes with a pinion. A rack is associated with the pinon and is moveable linearly to impart rotation of the pinion and in turn the sleeve. A lead screw on the sleeve engages a lead screw nut to cause the sleeve to displace axially along the mould core as the sleeve rotates. Lugs on the sleeve engages the moulded article and causes it to rotate with the sleeve so that the moulded article unscrews from the mould core allowing it to be ejected from the apparatus.

Abstract: A cylindrical retainer assembly for an injection molding machine includes a cylindrical body having a diametral through channel with a curved wall for receiving a complementarily configured end of an actuator. A spacer disc having a diameter substantially equal to the diameter of the cylindrical retainer body defines an aperture which receives and centers the actuator. The retainer assembly is received within a stepped cylindrical opening in the pin plate of the injection molding machine. An alternate embodiment retainer assembly includes a peripheral flange disposed adjacent the bottom of the retainer which may be received and retained within a cylindrical opening in the pin plate having straight walls and an adjacent recessed region. Pairs of resilient biasing members may be utilized to center the actuator in the cylindrical retainer.

Abstract: In a method of injection molding a tie that includes an abutment wall surface having at least one tooth inside a locking head facing a pawl, a retractable core that defines at least a portion of the abutment surface that includes the at least one abutment surface tooth is retracted so that the tie can be removed from the mold without significantly damaging the at least one abutment surface tooth. The core is disposed for retraction in a direction inclined toward the pawl at an acute angle away from the direction of insertion of the tongue of the tie into the locking head.

Abstract: A preform injection mould includes an elongate mould core cooperating with a female mould and a neck ring in a manner to define a mould cavity therebetween. An injection nozzle in the female mould allows molten plastic to be injected into the mould cavity so that a preform moulded article may be formed. The neck ring is constituted by a pair of mating halves which can be separated laterally with respect to the longitudinal axis of the mould core. A taper sleeve surrounds the mould core beneath the neck ring. The neck ring halves are secured to diametrically opposed slides to facilitate lateral separation of the neck ring. A pair of slide taper locks contact a respective one of the slides to inhibit lateral movement of the slides and to back up the neck ring when injection mould is in a mould closed position. An annular formation is formed on the upper surface of the neck ring and is accommodated by a complementary recess formed in the bottom of the female mould.

Abstract: A staged, sequentially separated injection molding apparatus for forming a molded container closure includes a mold base portion, a plurality of concentric, separable telescopic mold elements, and an opening therein defined by one of the base portion and the mold elements for injecting a mold material into the apparatus. The elements are configured such that they can be separated or removed from the mold, from the inner most element outward, to provide sufficient free space for the newly molded part to flex inward as the mold elements are removed. The inward flexing of the part, permits ready removal of the next outwardly most mold element, while minimizing the possibility of damage to the molded part. Each of the mold elements includes a mold face, which in conjunction with the base portion, in part defines a mold cavity. The inner and outer mold elements and the intermediate mold element include flange portions opposite of their respective mold faces.

Abstract: A manufacturing method for an injection molded steering wheel pad having a cover and a pocket formed between a first projection and a second hook-shaped projection, that together hold an arm of an air bag device. The method includes use of fixed and movable mold members opposed to one another. The movable mold member moves along a predetermined moving path to selectively contact and separate from the fixed mold member. Core members are provided in one of the mold members for forming the first and second projections in the pad. To permit the removal of the molded pad core members are movable between retracted and extended positions with respect to one of the movable and fixed mold members so that the formed pad projections can be separated from the mold by varying movements of the core members, relative to each other and the mold in which they operate.

Abstract: A retainer for a seat that can be molded by a pair of metal molds and which prevents water from entering into a portion which locks a hook member. The retainer for a seat comprises: a box-shaped leg body with an opening being inserted through a mounting hole; a flange extending outwardly from a vicinity of the opening; pawl portions protruding from outer surfaces of the leg body, and the peripheral edge of the mounting hole is held between the pawl portions and the flange; and retaining bodies protruding from the inner surfaces of the leg body in the direction of approaching each other, and resillently retaining a hook member which is inserted through the opening.

Abstract: In a method of injection molding a tie that includes an abutment wall surface having at least one tooth inside a locking head facing a pawl, a first mold part defines a portion of the abutment surface that includes the at least one abutment surface tooth and a second mold part defines at least a portion of a surface of the abutment wall that is on the opposite side of the abutment wall from the portion of the abutment surface that includes the at least one abutment surface tooth. The first mold part is separated from the second mold part while retaining the abutment wall in the first mold part to separate the second mold part from the opposite side of the abutment wall to thereby enable the abutment wall to flex in a direction away from the pawl into a space vacated by separation of the second mold part from the opposite side of the abutment wall so that the tie can be removed from the mold without significantly damaging the at least one abutment surface tooth.

Abstract: A method of producing a connector with a rear holder, wherein a housing 2 and a rear holder 3 are molded separately from each other by a set of molds 31 to 34. After molding, one of the molds (33) is moved to form a space between the housing 2 and the rear holder 3, and using another (34) of the molds, the rear holder 3 is moved toward the housing 2, thereby provisionally retaining the rear holder 3 on the housing 2.

Abstract: A model for a casting mold, particularly for the casting of blade wheels for turbo-engines, includes multiple cores which can be fitted into one another. The cores have exterior rings, portions of blade duct cores and connector plates. The portions of the blade duct cores supplement one another.

Abstract: A molded article having a large undercut part is efficiently produced by a method of molding a synthetic resin with the use of an apparatus comprising an outer mold (S) and an inner mold (N) arranged so as to form a cavity (C) inside the outer mold (S), said inner mold (N) comprising a central mold segment having a part whose size is reduced toward its head and mold segments (6, 7) for forming an inner surface of a molded article which are supported so as to be able to meet and get apart from each other around the central mold segment (4) and divided into a plurality of separate segments, wherein said mold segments for forming the inner surface of the molded article are rendered movable toward the center of the apparatus by moving the central mold segment and wherein the inner mold (N) is withdrawn in the form of its size reduced as a whole from inside the molded article (21) supported in the outer mold (S).

Abstract: This invention relates to a device to compact parts with an undercut out of powder metal, including a pair of dies linearly moveable relative to one another and then phased, and an associated linearly displaceable pair of punches to produce said parts with said undercut.

Abstract: In a method of injection molding a tie that includes an abutment wall surface having at least one tooth inside a locking head facing a pawl is formed in a mold that defines a tie in which the abutment wall includes at least one bulge adjacent each of opposite ends of the abutment wall for holding the abutment wall in the respective mold parts when the mold parts are first separated, with the at least one bulge adjacent one end of the abutment wall being defined by a first mold part and the at least one bulge adjacent the opposite end of the abutment wall being defined by a second mold part. As the first and second mold parts are being separated, the bulges initially hold the abutment wall in the respective first and second mold parts and thereby stretch and reduce the thickness of the abutment wall so that the tie can be removed from the mold without significantly damaging the at least one abutment surface tooth.

Abstract: A method for stripping a resilient bellows part from an injection mold has a step of injection molding a resilient bellows part around a colinear core pin and a stripper rod, surrounded by a split cavity. The bellows part has two open ends, one of which is substantially rigid and is closed by the stripper rod passing through it. The second open end is resilient. Another step opens the split cavity to permit the bellows part to be stripped from the core pin. Yet another step expands the bellows part radially outward from the core pin. Simultaneously with expanding the bellows part, a step of pushing the substantially rigid open end of the bellows part by the stripper rod causes the resilient portion and resilient open end to be stripped off the core pin. Finally, the substantially rigid open end of the bellows part is ejected from the stripper rod.

Abstract: To reduce the need for manual work, improve productivity and reduce the fabrication cost in the method for molding a lead screw for converting a rotational movement into a linear movement, there are provided a method and a die assembly which may involve the steps of forming a plurality of holes in a wall of a tube in a spiral arrangement, preparing a metallic die assembly provided with a cavity defining a thread groove adapted to form the thread crest matching in position with an array of the holes, placing the tube in the cavity, and injecting synthetic resin material into the cavity so that the synthetic resin material may flow in two separate flows, one flowing inside the core tube, and the other flowing along the outer surface of the core tube. The thread crest is connected to the synthetic resin material filled in the core tube, and can be securely attached to the core tube. Optionally, an annular rotor may be fitted onto the base end portion of the lead screw.

Abstract: A method making an affixation member including a body for affixation to a surface of a structure and means for fastening the body to the surface. The fastening means including an interengaging fastener member which has a base secured to the body and a plurality of headed stems arranged on the base. The fastening means is formed by flowing molten material into a base mold, a destructible stem mold and a head mold. The base mold and head mold are separated, and the destructible stem mold and the molded interengaging fastener member are placed within a cavity of a body mold. An affixation member fixedly supporting the interengaging fastener member is molded in the cavity of the body mold. The body mold is separated from the molded affixation member, and the stem mold is destructibly removed from the interengaging fastener member fixedly supported on the molded affixation member.

Abstract: A method and apparatus are provided for injection-molding a unitary, relatively rigid thermoplastic device having a field of injection-molded hooks integrally formed in predetermined areas on the device during the injection-molding of the device for releasable attachment to an associated co-operative loop bearing member.

Abstract: A method of fabricating a wax casting of a golf club iron head including the steps of providing a wax injection tool having a rear cavity projection; providing a collapsible insert that is shaped to provide a desired undercut peripheral region in the rear cavity of the wax casting; installing the collapsible insert on the periphery of the rear cavity projection of the tool; injecting hot wax into the tool and allowing the wax to harden; then removing the hardened wax and insert from the injection tool; and finally removing the insert as a unitary member from the hardened wax, without requiring any form of breakage of the wax casting or the insert such as by distorting its shape.

Abstract: It is an object of the present invention to provide a linear bearing which is easy to manufacture and has sufficient mechanical strength, and its production method. A slider 1 guides a table or other movable bodies along a rail 2 and includes a thin ball plate 6 in which load ball channels 61 are formed to move balls 5 therein, and a thin mounting plate 7 adapted to secure the movable body. A molding material 8 such as resin or die cast alloy is molded to insert the ball plate 6 and the mounting plate 7 thereinto. The rail 2 is made of a metallic material 2 whose surface is hardened to a predetermined level when subjected to plastic deformation. During plastic deformation, the ball channels 23 are hardened to a predetermined level.