Abstract: A control panel for electronic equipment that satisfies the requirements of hermeticity, clearness of indication and operability and yet allows a cost reduction. A sheet made of a commercially available light-transmitting thermoplastic synthetic resin material is used as a substrate. Sheet recesses are formed on the sheet so that each print layer formed on the surface of the sheet is located on the inner side of the bottom of a sheet recess. The sheet recesses are filled with a synthetic resin material to form pushbuttons. A contact surface of a case cover and a contact surface of a pushbutton outer skin are kept in close contact with each other during injection molding. Therefore, there is no possibility of the resin material flowing between the contact surfaces. It is unnecessary to insert a mold member into the clearance between each pushbutton and the associated opening in the case cover. Because the clearance can be minimized, it becomes easy to achieve a size reduction and so forth.

Abstract: A method for movably connecting two members. The method includes the steps of molding a first member in a first mold portion and placing the first member within a second mold portion. The method also includes inserting molten material into the second mold portion to form a second member. The method further includes limiting contact between the first member and the material to prevent bonding between the first member and to permit relative motion between the members. The method also includes cooling the molten material into a solid form, whereby an assembly is formed from the first and the second member. The method further includes removing the members from the second mold assembly.

Abstract: A container for retaining articles includes a pliable sack and a closure attached to an opening of the sack. The closure includes a substantially flexible member having a pair of anchors and a substantially rigid member having a pair of pivotal seats. Each of the pivotal seats is adapted to receive a respective one of the anchors of the flexible member. The closure is positionable between a closed position in which the flexible member is substantially proximate to the rigid member and an opened position in which the flexible member is substantially separated from the rigid member. The closure may be configured to have a generally circular shape when in the opened position and a generally crescent shape when in the closed position. The seats may be configured to slidably receive the anchors to minimize complexity in the manufacturing process. Each of the rigid and flexible members preferably has a unitary construction to further reduce manufacturing costs.

Abstract: A headed thermoplastic tube having a closure member is formed solely from a thermoplastic extruded, stretched sleeve by positioning the sleeve over a forming mandrel with an exposed portion and heating the exposed portion. The heated exposed portion is shaped into a head in a single step by contacting the exposed portion with a closure means which is later retained on the head after initial contact. The internal cavity of the closure means, which may have threads or grooves formed in the internal cavity, is made of an incompatible material to facilitate the forming of a head in said cavity. The closure means may also have tamper evident features.

Abstract: A cover unit for a vehicle roof, which can be opened, has a cover plate, a reinforcing frame arranged therebelow, and a seal-receiving frame, injection molded around the outer periphery of the cover plate, the seal-receiving frame having an encircling groove for receiving a peripheral seal at its outer periphery. In a process for the manufacture of a such cover, an inwardly directed part of the peripheral seal directly serves as a core which forms the seal-receiving groove by which it is detachably interlocked with the seal-receiving frame.

Abstract: A method of molding a movable block for a rolling motion guide device can effectively prevent the formation of burrs in the rolling member rolling groove and accurately positioning the movable block body in a molding die.The positioning of the movable block body in width, vertical and longitudinal directions is performed at plain surfaces that are different from the rolling member rolling groove, so that damage or injury of the rolling member rolling groove can be prevented. Further, the molding material is shut off at either both end portions or both side peripheries of the rolling member rolling grooves, so that the molding material can be prevented from invading into the rolling member rolling grooves.

Abstract: An injection molding method for forming an article having a receptacle with a coating on an interior surface includes providing an injection molding tool with at least one cavity in one part and at least one core pin projecting from a second part having an outside surface. The core pin is sized to fit within the cavity with a clearance thereby defining a cavity space. The injection molding tool has an open position wherein the core pin is withdrawn from the cavity and a closed position wherein the core pin is disposed within the cavity for defining the cavity space. The method further sequentially then includes moving the injection molding tool to the open position and applying a coating of a coating material to the outside surface of the core pin. The method further includes moving the injection molding tool to the closed position.

Abstract: A molded plastic mounting part (15, 16, 23) is formed as a base for function parts in a metal supporting plate (1, 20). The mounting part, in order to be mounted on the support plate, has a bridge element (5, 17) traversing a hole (2, 21) in the metal supporting plate and has retaining elements (7a, 7b) which bear against both plate surfaces (6a, 6b) of the metal supporting plate. To guarantee that the predetermined position of the mounting part with respect to the axis of the hole is maintained in spite of the shrinkage of the plastic material, the plate surfaces of the metal supporting plate (1, 20) have recesses (4a, 4b;) adjacent the hole, which recesses are engaged by projections (11a; 24a to 24d, 25a to 25d) of the retaining elements of the mounting part.

Abstract: To provide a rotatable joint assembly in which connection is made so as to enable a click motion, a process for manufacturing such a rotatable joint assembly by molding as a unitary structure, a movable body including such a rotatable joint assembly, and a process for manufacturing such a movable body by molding as a unitary structure.

Abstract: A backlit button assembly suitable for use in an illuminated graphic display in an instrument panel of an automobile. The backlit assembly is composed of a support member and any number of molded plastic or silicone rubber buttons or keys that, together with the support member, form a keypad or switchpad. Each button of the assembly is injection molded to include a translucent portion that enables light to be transmitted from a backside of the button to a front surface of the button accessible to a person operating the button assembly. Each button is disposed at least partially within an opening formed in the support member, and has at least one integrally-formed hinge member that is directly adhered to the support member. The hinge member flexibly interconnects the button with the support member such that the button is flexibly supported within the opening in the support member.

Abstract: A method for obtaining a tight, secure connection between two relatively non-deformable members and the connection resulting therefrom. The method includes the steps of forming a recess in a first of said members, forming a second member with a portion that seats in the recess of the first member, molding a liner of thermoplastic to one of the members, which thermoplastic is deformable but not more than slightly compressible, and seating the portion of the second member in the recess of the first member with one of the members engaging the liner to displace a portion of the liner into a void space in one of the members to thus form a tightly gripping connection between the members. A composite knob and its connection to shaft made in accordance with this method are also disclosed.

Abstract: An elastomer bearing (20) and assembly method therefor. The bearing (20) includes an inner member (22) having an outer profiled surface with a maximum radial dimension, an outer member (24) having a minimum radial dimension which is smaller than said maximum radial dimension and a inner profiled surface. The outer member (24) includes first (26) and second halves (28) being inserted axially over the spherical portion (23) of inner member (22). Each halve (26, 28) including axial threaded portions (32) which are threadedly interconnected to secure halves (26, 28) together. An elastomer layer (30) is bonded to said outer profiled surface of said inner member (22) and said inner profiled surface of said outer member (24). In another aspect, the profiled surfaces are spherical surfaces. Preferably, air is vented into the threaded escapeway (33) during the bonding process. A radial gap (34) is provided to aid is air removal/venting.

Abstract: A method for applying a low friction coating to the cooperating splines of a slip joint that results in precise conformance between the intermeshing splines of the telescoping members includes the initial steps of cleaning, priming, and coating the splines of a tube shaft with a low friction material. Then, the coating on the splines is shaped to precisely conform to internal splines provided on a slip yoke of the slip joint. To accomplish this, an annular die is provided having a generally hollow and cylindrical shape, but tapering from a relatively large diameter upper end to a relatively small lower end. Thus, an inner frusto-conical surface is defined through the center of the die. A plurality of tapered splines is formed on the inner frusto-conical surface of the die that are generally shaped in a complementary fashion to the splines formed on the tube shaft. The die may be provided with a device for heating the die to a desired temperature.

Abstract: The invention relates to a method of manufacturing a roller bearing comprising a cage made from a thermoplastic polymer-containing material. By cross-linking the polymeric material its properties, such as form retention and compatibility with lubricants, are improved. A roller bearing provided with a cage made from suitably cross-linked thermoplastic polymer-containing material can be used even at temperatures above the melting point of the polymer. According to the invention a roller bearing is manufactured by forming a cage from thermoplastic polymer-containing material, providing it with rotating bodies and only then cross-linking the material. This avoids damage to an otherwise already rigid cage during the insertion of the rotating bodies.

Abstract: A self aligning die guide pin bushing incorporates inner and outer sleeves that are axially locked together, but which can shift radially relative to one another sufficiently to accommodated an eccentricity between the guide pin and the bore in which the bushing is mounted. The outer sleeve of the bushing is mounted to the bore conventionally, and is removable. After the outer sleeve is mounted, the other die is moved so as to push the guide pin through the inner sleeve, thereby forcing the inner sleeve into alignment with the guide pin. Then, an epoxy layer is injected into the spaced between sleeves to fix the inner sleeve in alignment with the guide pin.

Abstract: A method for obtaining a tight, secure connection between two relatively non-deformable members and the connection resulting therefrom. The method includes the steps of forming a recess in a first of said members, forming a second member with a portion that seats in the recess of the first member, molding a liner of thermoplastic to one of the members, which thermoplastic is deformable but not more than slightly compressible, and seating the portion of the second member in the recess of the first member with one of the members engaging the liner to displace a portion of the liner into a void space in one of the members to thus form a tightly gripping connection between the members. A composite knob and its connection to shaft made in accordance with this method are also disclosed.

Abstract: A composite button of an electrical device has a frame body (1) with a through bore that terminates at openings, and a button portion (2) with a pressing portion (3) extended through the through bore and a flange portion (4) fused to the frame body (1). A silicone resin layer (5, 24) is interposed between the frame body and the flange portion, and surrounds one of the openings. A method of manufacturing a composite button of an electrical device by molding a frame body, forming a silicone resin layer on a surface of the frame body, and simultaneously molding a button portion to a predetermined shape while fusion boding areas of the button portion contacting the frame body.

Abstract: In a method of molding a resin pulley in which a rolling bearing is integrally fitted to the inner periphery of an annular resin body simultaneously with the molding of the resin body, a dummy boss shaft closes the inner periphery and a lateral side of the metallic member. With the cavity molds closed, an annular film gate is formed, by a flange of the dummy boss shaft and a cavity mold, in the vicinity of the outer peripheral edge of an end surface of the rolling bearing. The cavity is charged with molten resin through the film gate.

Abstract: A method for outsert molding a movable plastic part on a metal plate, wherein the movability is obtained automatically through the shrinkage of the plastic. The plastic part consists of a bridge element which traverses a hole in the metal plate and is integrally connected to opposing retaining elements by a film element. The size, shape, and rigidity of the film, bridge, and retaining elements are such that the forces produced during the shrinkage process lift the retaining elements off the metal plate.

Abstract: The invention concerns a procedure for the manufacture of an assembled object intended for repeated assembling and disassembling, e.g. a tube (1) with matching cap (4), and a machine for the execution of this procedure. According to the invention the tube (1) and the cap (4) are cast in the same mould (7) end ejected simultaneously and assembled in the exact position they are to have when used. This can suitably be done by first casting the part (4), which at the boundary surface is placed outermost. When it has assumed its final shape, it serves as an independent mould when producing the other part (1). The first cast part (4) thus contributes to the securing of the core system (9, 10, 11) for the other part (1), whereby the wall thickness of this part can be made especially uniform and thin. The machine for the execution of the procedure can thus cast e.g. the assembled cap (4) and tube (1), and it can, therefore, also be adapted to perform an automatic filling, sealing and possibly stamping of the tube.

Abstract: A process is provided for injection molding a plastic material into an interfacial space between a spherical ball and a spherical cavity of a ball and socket joint assembly to form a plastic bearing which has an as-molded tapered undercut. A sacrificial ring having a preselected outer diameter and a generally triangular cross-sectional shape is selected. The sacrificial ring is placed around the ball adjacent the neck of the ball assembly. The sacrificial ring is rigidly confined between the ball, the cavity, and the mold. The plastic material is injection molded into the interfacial space and a plastic bearing having a tapered undercut which mimics the shape of the sacrificial ring is formed.

Abstract: A method of manufacturing a panel button includes providing a molding die including a transferable molding die defining a cavity, a core molding die having a runner, a sprue and a gate and a stationary molding die having a sprue. A hollow space is provided in a bottom of the cavity wherein a push button is formed. A projecting portion is inserted into the cavity and is formed on the underside of the core molding die. Two hollow coaxial spaces are connected to each other, one to form a boss, the other to form an elastic arm. A plastic sheet is introduced into the cavity and is sandwiched between the transferable molding die and the core molding die. The plastic sheet has an unbonding portion at a position where the push button is to be formed. A molten resin material is injected into the cavity through the runner, sprue and gate. The thus formed panel button includes the push button on the plastic sheet.

Abstract: A connector assembly with a connector body molded directly about a captive ball formed on a separate shaft, where the shaft and connector are attached to separate bodies which move relative to each other. This assembly retains an essentially zero clearance fit between the ball and the connector so as to prevent rattling between the parts from vibrations. This zero clearance fit is achieved at a much lower cost than comparable quality connectors due to higher diametric tolerances for the ball component. Higher diametric tolerances do not affect the final fit because the connector is molded directly about the ball.

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.

Abstract: A system for fixating a shaft in its bearing casing as well as in a wiper installation the shaft is fixated in its bearing in that the annular gap between the shaft and the bearing is filled by the injection of a plastic material rendering optimum sealing and load bearing qualities.

Abstract: A method of manufacturing a functional part of synthetic resin material in a bearing plate so as to have good bearing properties. The functional part is formed at a bearing plate by a synthetic-resin injection-molding technique (outsert molding technique) with a bridge portion extending through a hole having hole walls of the bearing plate and with integral retaining portions disposed at both plate surfaces laterally of the hole. The functional part consisting of the bridge portion and the retaining pieces is then changed by a deformation process following the injection-molding operation so that it forms a rotation or slide bearing together with the bearing plate. In the deformation process, the synthetic resin material is pressed away by a mandrel acting on an internal wall of a bore in the bridge portion to cause the synthetic material to flow towards the hole wall of the bearing plate and longitudinally towards the plate surfaces.

Abstract: A method is described for the production of a device for transmitting a signal between two end points, at least one of which is movable relative to the other, and between which a wound line which forms a coil and is contained in a substantially circular cassette is arranged. Further extending lines are connected to the line at the two end points. The cassette consists of two parts, namely a stator and a rotor which is turnable around its axis and around the stator. The two parts of the cassette are connected in secure manner to each other by injection molding, in such a way that the rotor is turnable around a common axis within the stator.

Abstract: A technical device, particularly an electromechanical deck for moving information carriers, has at least one plastics function part (25) formed on a metal plate, which part has been moulded onto the metal plate (8) by outsert-moulding and comprises at least one bridge element (28), which traverses a hole (26) in the metal plate (8), and retaining elements (30, 31), which are situated on the metal-plate surfaces (8a, 8b) and are interconnected by the bridge element (28), the movability of the function part (25) as a slidable or rotatable part being obtained automatically through shrinkage of the plastic by the following construction:a) the bridge element and the retaining elements are formed as tubular elements (28, 30, 31),b) the tubular retaining elements (30, 31) surround the edges of the hole (28) with a clearance (a) over the entire circumference,c) the bridge element (28) and the retaining elements (30, 31) are connected at the peripheral location of the hole (26) by an imperforate or perforate plastic f

Abstract: A technical device, such as an electromechanical deck for moving information carriers, includes a plastics function part molded into a deck plate by outsert-molding. The function part includes a bridge element, which traverses a hole in the deck plate, and retaining elements, which are situated at the deck plate surfaces and are interconnected by the bridge element, the plastics of said part being subject to shrinkage after injection-molding. The mobility of the function part as a rotatable or slidable part is obtained automatically despite shrinkage of the plastics part by positioning the retaining elements at each end of the bridge element so that they do not overlap, when viewed in the axial direction of the bridge, with a retaining element at the opposite end of the bridge.

Abstract: A sliding type coupling device is disclosed which includes: an inner member having a sliding contact portion; a cylindrical outer member which receives therein the sliding contact portion; and a slidable member made of synthetic resin and attached to an inner surface of the outer member. The sliding contact portion of the inner member is slidably supported by an inner circumferential surface of the slidable member. The coupling device further includes a substantially annular retainer ring disposed in engagement with a circumferential groove formed in an inner surface of the outer member. The retainer ring abuts on one axial end of the slidable member, so as to limit an axial displacement of the slidable member. The slidable member includes a gap-filing portion which intrudes into the groove and fills a gap between an inner wall of the groove and the retainer ring. Also disclosed is a method of producing such a sliding type coupling device.

Abstract: The present invention relates to a method of producing pivoted tools such as scissors, pliers, pruners, and the like. More particularly, this invention is concerned with the method of producing tools having a force applying end with formed handles, and opposed working ends disposed across a pivotable joint. In these tools, the pivotable joint comprises a pivot member formed concurrently with the handles as an integral part of one of the handles.

Abstract: An insert and method of molding the insert for use with an instrument panel or the like of a vehicle and in which the insert serves as a structural part of a cover for an air bag assembly and is provided with a door which opens upon being impacted by the inflating air bag and in which the door is formed of a flexible plastic material that is bonded in certain areas to the insert and has its plastic material interlocked with the plastic material of the insert in areas which serve as a hinge for the door.

Abstract: A gear is comprised of a central radial hub, a radial gear-toothed rim and a stress dissipating structure.

Abstract: A plurality of shapes each having a fundamental construction of a flange are vacuum formed on a continuous sheet of thermoplastic resin. When blanking each of the formed shapes out of the resin sheet into an individual flange, a spool core is placed coaxially with the formed shape placed in the blanking position. The flange just blanked out of the resin sheet is moved in the blanking direction toward the spool core, to be fit on the spool core. The shapes are formed in a double line along the resin sheet, and thereafter, the resin sheet is slit along the longitudinal direction into two sheet branches each having the formed shapes arranged in a single line. The back side surfaces of the two sheet branches are opposed to each other, and the spool core is disposed between the sheet branches and oriented in a direction perpendicular to the back side surfaces of the sheet branches. The formed shapes are blanked out of the sheet branches in opposite directions toward opposite ends of the spool core.

Abstract: An improved crank handle assembly for a shade umbrella suitable for patio or beach use, which has a bolt and a crank formed as a unitary member where the head of the bolt is insert molded into the hub of the crank in its manufacture. An annular spacer is mounted on each end of the bolt. An end of the bolt has a reduced threaded portion, which receives a washer and a nut, and the main body of the bolt forms a shoulder adjacent to the threaded portion. The washer abuts against the shoulder and one of the spacers at one end of the bolt. Tightening of the nut causes the washer to bottom out against the shoulder, and the annular spacers to abut against the umbrella pole applying a predetermined amount of compressive force to the crank handle assembly and the umbrella pole.

Abstract: A process for moulding a fastener formed from two members arranged one inside the other, in which the two members are moulded from a fluid plastic material within separate moulding cavities of the same mould with the use of a common cylindrical core so as to form the members separate from one another but facing each other axially. Subsequently, while the members are at a high enough temperature so as to ensure their high deformability, the mould is opened by the movement of respective parts forming the lower die so as to release only the first member, and the subsequent withdrawal of the core causes the insertion of the first member into a through-hole in the second member and, finally the core is withdrawn completely from the fastener. The latter is then expelled from the mould.

Abstract: An electromechanical device for moving magnetic tapes or disks has a metal load-bearing plate provided with openings and injection molded plastic control rods and shafts held in phase by injection molded plastic retention pieces connected through the openings. These retention pieces are provided with a greater clearance relative to the metal load-bearing plate than that achieved by injection molding by a deformation blow to the plastic control rods and shafts after molding.

Abstract: In two-stage injection molding of a blow-out port device including a housing of synthetic resin, which includes pairs of shaft bores provided in a coaxial arrangement in opposed wall portions of a peripheral wall to extend through the opposed wall portions, and a plurality of blades of synthetic resin which each include a pair of support shafts projectingly provided at opposite ends of a blade body disposed within the housing and rotatably fitted in the shaft bores, the following steps are used: a primary injection step for forming the housing; a secondary injection step for forming blade bodies by using shaft bores in the housing as support shaft-forming cavities; a step of permitting the blow-out port device to be left on one of opening/closing dies by utilizing protrusion fitted in recesses formed in the housing; and a step of bringing ejector pins into abutment against rear edges of the blades to push-off the blow-out port device from the opening/closing die.

Abstract: In producing a blow-out port device in a two-stage inject:on molding process by use of synthetic resin, the blow-out port device having a housing including pairs of shaft bores and pairs of circular section bosses both provided in and on opposed wall portion of a peripheral wall of the housing, and a plurality of blades each including a pair of protruding portions provided at opposite ends of each of blade bodies disposed within the housing to abut against a pair of boss and to have the same outside diameter as the boss, and a pair of support shafts projectingly provided on end faces of the protruding portions and turnably fitted in the shaft bores, the housing is forced at a primary injection step, and then, the blades are formed at a secondary injection step by use of the shaft bores in the housing as support shaft-forming cavities. Thus, it is possible to provide an air-conditioning blow-out port device having an improved appearance around a mounting portion of each blade.

Abstract: A gear is comprised of a central radial hub with a web radially extending therefrom and an independent radial gear-toothed rim, both of which are radially coupled by a stress dissipating resilient member attached thereto and being located in a plane parallel to that of said web. The resilient member is laterally supported by the adjacent web and the resilient member side walls are proximately parallel to the web side walls such that the resilient member is not located between the outer peripheral edge of the web and the inner peripheral edge of the rim. Furthermore, the present invention comprises a process by which such a stress dissipating gear is manufactured.

Abstract: A flow control valve including a movable part and a housing for accommodating the movable part may be produced by molding the components in sequential steps. Preferably, the housing is molded in a first step and the movable part is molded in an at least partially closed position in a second step in the same mold. This method enables the surface of the housing to serve as at least a portion of the mold for forming a substantially sealing portion of the movable part such that a very close tolerance between these components is achieved. The movable part is preferably a butterfly disc and the housing is preferably a butterfly valve housing.

Abstract: In a method for the injection molding of objects of at least two independent parts, which are connected nondetachably but mutually rotatably, the subsequently produced part being injected at least partially into a mold recess of the previously produced part or injected at least partially about the previously produced part, an approximately hollow, cylindrical element (1) is molded to the part produced first in the region connecting this part to a rotatable part (18) that is to be produced subsequently, which hollow, cylindrical element (1) is thereupon surrounded by a mold (10) for the subsequent part (18) and, for the production of this part (18), either the outer space of the hollow, cylindrical element (1), which is closed off by a core, or the inner space (9) of this hollow, cylindrical element (1), which is not closed off, is injected for the production of this part (18), the part produced first being deformed in the region of the hollow cylinder (1) into an undercut with rotational symmetry by the press

Abstract: A process for making an all-plastic rod end to enable an articulated linking of two members. The process includes providing first and second split bearing raceway members each of which defines one-half of an annular bearing raceway and a stem having an open ended semi-cylindrical recess. A spherical ball dimensioned to fit in the annular bearing raceway also is provided. The spherical ball is placed into the first split bearing raceway member, and the second split bearing raceway member is placed over the first split bearing raceway member to define a complete annular bearing raceway that encases the ball. The process continues by molding a plastic housing around the split bearing raceway members but spaced from the spherical ball to enable free movement of the spherical ball therein.

Abstract: A pump spray dispenser with an inner cylindrical tube (2) in the container portion (1) and a piston mounted on the handle (6) is provided with inwardly directed projections (14) about the mouth of the cylindrical tube. During the assembly process, the container parts with tubular cylinders are slipped onto upright mandrels fixed to a conveyor belt or the like. Each mandrel bends the projections towards the interior end of the cylindrical tube and when the container portion is removed from the mandrel, the projections begin recovery towards their original shapes sufficiently slowly to enable the piston to be inserted past the projections without damaging the piston. The projections then return to a still bent position in contact with the piston stem (4) to center and retain the piston assembly.

Abstract: In a chain thrower mechanism of a bicycle derailleur gear mechanism a parallelogram is formed by at least four parts. One of these parts is prefabricated by injection moulding with respective hinge portions. A second of these parts is formed with respective hinge portions by using one hinge portion of the prefabricated part as a shape-giving part for injection moulding of the other part.

Abstract: A method of integrating a valve system with a to be molded component part, such as a throttle valve assembly and a throttle body or air horn, consisting of: first, assembling or manufacturing the throttle valve assembly; second, coating or completely lining the valve assembly with a meltable core material; third, placing the lined valve assembly in place in a die of the throttle body or air horn to be molded; fourth, removing the molded throttle body with valve assembly integral therewith; and finally, heating the meltable core material between the throttle valve assembly and air horn to melt it and remove it therefrom to provide the desired clearance space between, permitting relative rotation between the two.

Abstract: A method for casting polymer threads (32) in a nut cavity (14) complementary to the threads (44) of a casting screw (42) to minimize the formation of air pockets and air bubbles in the polymer threads. The cavity (14) of the nut (12) has a diameter larger than the diameter of the casting screw (42). The threads (32) of the nut (12) are formed in a polymer (30) which is dispensed into the nut cavity (14) and which cures around the threads (44) of the casting screw (42) after the screw is inserted into the cavity of the nut. The method for casting the threads (32) includes the steps of closing the bottom of the nut cavity (14), thereafter filling the nut cavity with polymer (30), and thereafter inserting the casting screw (42) slowly down into the polymer.

Abstract: To seal against liquid leaking out around a rod which is slidably movable lengthwise axially within a chamber containing the liquid through an opening in the rear wall of the chamber, a ring of thermoplastic material is placed in the chamber around the rod and pressed against the rear wall of the chamber while applying heat to cause the thermoplastic material to flow into the opening around the rod and onto the outside of the wall so that when the heat is removed the material sets and latches itself onto the rear wall to seal off the space around the rod while still allowing the rod to slide easily.

Abstract: The plate-like valve elements (10 and 20) of the microvalve are provided with a plurality of valve seats and, respectively, corresponding valve members. The sealing surfaces of a secondary valve element (10) are respectively formed by molding to copy the sealing faces of a primary valve element (20) so that the sealing surfaces of both valve elements are completely complementary to each other. The sealing surfaces need no further processing such as machining. Despite liberal tolerances of manufacture a high precision register of the valve elements in relation to each other is ensured.

Abstract: A molding device for molding a sliding member of a slide fastener includes a first mold, a second mold movable toward or away from the first mold to close or open the molding device, at least one set of upper movable moving parts, a first upper stationary molding part detachably fixed to the first mold and a second upper stationary molding part detachably fixed to the second mold. The upper stationary molding parts are replaceable to alter the design of the holding end of a pulling tab of the slide fastener. Each set of the upper movable molding parts includes a first and a second upper movable molding part installed in the first mold, a third and a fourth upper movable molding part in the second mold.