An injection molding die includes a fixed die and a movable die that move in a die opening/closing direction relatively to each other. A cavity that is formed between the fixed die and the movable die in a die clamping state includes a lateral cavity portion that extends along the die opening/closing direction and a first orthogonal direction. The injection molding die includes a demolding core and a following core that define an end portion of the lateral cavity portion across the fixed die and the movable die in a second orthogonal direction. The demolding core and the following core are configured to be movable in the second orthogonal direction while defining the end portion of the lateral cavity portion across the fixed die and the movable die in the die clamping state, and to be engaged with the fixed die with substantially no play in the second orthogonal direction.

A mold apparatus for producing a molded article by injection molding includes (a) a base plate for mounting to a platen of an injection molding machine; (b) a core plate movably coupled to the base plate and axially translatable relative to the base plate between a plate advanced position and a plate retracted position; (c) a lead screw rotatably supported by, and axially fixed relative to, the base plate; and (d) a lead nut coupled to the lead screw and rotationally fixed relative to the core plate. The lead nut is translatable in response to rotation of the lead screw between a first and a second abutment surface fixed relative to the core plate. The lead nut alternately bears against the first abutment surface for moving the core plate to the plate advanced position and the second abutment surface for moving the core plate to the plate retracted position.

A mold apparatus for producing a molded article by injection molding includes (a) a base plate for mounting to a platen of an injection molding machine; (b) a core plate movably coupled to the base plate and axially translatable relative to the base plate between a plate advanced position and a plate retracted position; (c) a lead screw rotatably supported by, and axially fixed relative to, the base plate; and (d) a lead nut coupled to the lead screw and rotationally fixed relative to the core plate. The lead nut is translatable in response to rotation of the lead screw between a first and a second abutment surface fixed relative to the core plate. The lead nut alternately bears against the first abutment surface for moving the core plate to the plate advanced position and the second abutment surface for moving the core plate to the plate retracted position.

The invention relates to a process for producing a beam guiding grid (4), comprising a molding having a grid of passageways (40) and wall areas surrounding them, from radiation-absorbing metal powder and binder, especially tungsten powder and binder. Advantageous production is achieved in that the molding is produced by injection molding, wherein the homogenized mixture, as a prepared flowable injection compound, is injected using an injection molding machine into a molding tool (7) that produces the molding, into which movable mold cores (72) were introduced prior to filing with the molding composition.

The invention relates to a process for producing a beam guiding grid (4), comprising a molding having a grid of passageways (40) and wall areas surrounding them, from radiation-absorbing metal powder and binder, especially tungsten powder and binder. Advantageous production is achieved in that the molding is produced by injection molding, wherein the homogenized mixture, as a prepared flowable injection compound, is injected using an injection molding machine into a molding tool (7) that produces the molding, into which movable mold cores (72) were introduced prior to filing with the molding composition.

A novel mold and slide apparatus system comprises at least a first mold member and a second mold member that together define an internal cavitation. A slide apparatus is mounted on the first mold member for moving an insert member into and out of an internal cavitation in the first mold member. The slide apparatus comprises a main body having a drive cylinder defining a drive-cylinder axis and a carrier cylinder defining a carrier-cylinder axis. A drive piston is disposed in sealed sliding relation in the drive cylinder for movement along the drive-cylinder axis between a start position and a fluid displacement position. a carrier piston is disposed in sealed sliding relation in the carrier cylinder for movement along the carrier-cylinder axis between a retracted position and an extended position. The insert member is connected to the carrier piston for movement therewith for engaging the internal cavitation when the carrier piston is in the extended position. A fluid communication passage interconnects the drive cylinder and the carrier cylinder in fluid communication one with the other, with the fluid communication passage filled with hydraulic fluid. Movement of the drive piston from its start position to its fluid displacement position causes, via the hydraulic fluid, the carrier piston to move from its retracted position to its extended position. Movement of the carrier piston from its extended position to its retracted position causes, via the hydraulic fluid, the drive piston to move from its fluid displacement position to its start position. An actuator is movable between a non-actuating position and an actuating position. Movement of the actuator from its non-actuating position to its actuating position causes the drive piston to move from its start position to its fluid displacement position, thereby causing the carrier piston to move from its retracted position and its extended position to correspondingly move the insert member into the internal cavitation during a molding operation. A biasing mechanism is operable to return the carrier piston to the retracted position.

A novel mold and slide apparatus system comprises at least a first mold member and a second mold member that together define an internal cavitation. A slide apparatus is mounted on the first mold member for moving an insert member into and out of an internal cavitation in the first mold member. The slide apparatus comprises a main body having a drive cylinder defining a drive-cylinder axis and a carrier cylinder defining a carrier-cylinder axis. A drive piston is disposed in sealed sliding relation in the drive cylinder for movement along the drive-cylinder axis between a start position and a fluid displacement position. a carrier piston is disposed in sealed sliding relation in the carrier cylinder for movement along the carrier-cylinder axis between a retracted position and an extended position. The insert member is connected to the carrier piston for movement therewith for engaging the internal cavitation when the carrier piston is in the extended position. A fluid communication passage interconnects the drive cylinder and the carrier cylinder in fluid communication one with the other, with the fluid communication passage filled with hydraulic fluid. Movement of the drive piston from its start position to its fluid displacement position causes, via the hydraulic fluid, the carrier piston to move from its retracted position to its extended position. Movement of the carrier piston from its extended position to its retracted position causes, via the hydraulic fluid, the drive piston to move from its fluid displacement position to its start position. An actuator is movable between a non-actuating position and an actuating position. Movement of the actuator from its non-actuating position to its actuating position causes the drive piston to move from its start position to its fluid displacement position, thereby causing the carrier piston to move from its retracted position and its extended position to correspondingly move the insert member into the internal cavitation during a molding operation. A biasing mechanism is operable to return the carrier piston to the retracted position.

The present invention provides a die assembly for molding a resin-made insert having a sleeve that is inserted into an intake port of an internal combustion engine. Each sleeve has one inlet and two outlets. The die assembly includes an inner die and an outer die. The inner die includes an inlet side part and an outlet side part. The inlet side part and the outlet side part mold an inner peripheral surface of the sleeve in an assembled state, and are removed in mutually opposite directions. By means of this assembly, a sleeve having a complicated structure and shape can be molded easily.

A mold includes: a fixed mold including a first mold plate; a movable mold including a second mold plate; and a molding cavity by combining the fixed mold and the movable mold with each other. At least one of the first and the second mold plates includes: a nest in a stepped pillar shape, the nest including a large diameter portion engaged in the insertion hole, and a small diameter portion in which a transfer surface to form an optical function surface of a molded product is formed; and an outer-diameter forming member in a stepped cylindrical shape, the outer-diameter forming member including a cylindrical portion arranged around the small diameter portion of the nest, and engaged in the insertion hole, and a flange portion in which a transfer surface to form an outer diameter portion of the molded product is formed.

A mold includes: a fixed mold including a first mold plate; a movable mold including a second mold plate; and a molding cavity by combining the fixed mold and the movable mold with each other. At least one of the first and the second mold plates includes: a nest in a stepped pillar shape, the nest including a large diameter portion engaged in the insertion hole, and a small diameter portion in which a transfer surface to form an optical function surface of a molded product is formed; and an outer-diameter forming member in a stepped cylindrical shape, the outer-diameter forming member including a cylindrical portion arranged around the small diameter portion of the nest, and engaged in the insertion hole, and a flange portion in which a transfer surface to form an outer diameter portion of the molded product is formed.