Abstract: The novel solution provides a closing part comprising an electromechanical drive for a CD injection molding machine having a working stroke and a servicing stroke. The entire mold closing unit is characterized by the combination of a short-stroke crank mechanism which is operated by an electric motor and which is provided for the working stroke and of a central electromotive column-type nut drive for the servicing stroke. According to the invention, synchronous motors or asynchronous motors are used with corresponding servo boosters to realize servo axles. The central column drive is used as a control element of the closing force control, together with a force sensor for detecting the closing force, as an actual value transmitter and as a control device.

Abstract: In a co-extrusion system, a primary extruder is connected to a primary flow director to direct the solid melt from the primary extruder to the co-extrusion assembly. A secondary extruder is connected to a secondary flow director to direct the melt from the secondary extruder to the co-extrusion assembly. A co-extrusion assembly produces simultaneous co-extruded melts without any significant pressure change in the melt. Dies shape the co-extruded melts to a desired shape.

Abstract: Methods and apparatuses are provided for the manufacture of coextruded polymeric multilayer optical films. The multilayer optical films have an ordered arrangement of layers of two or more materials having particular layer thicknesses and a prescribed layer thickness gradient throughout the multilayer optical stack. The methods and apparatuses described allow improved control over individual layer thicknesses, layer thickness gradients, indices of refraction, interlayer adhesion, and surface characteristics of the optical films. The methods and apparatuses described are useful for making interference polarizers, mirrors, and colored films that are optically effective over diverse portions of the ultraviolet, visible, and infrared spectra.

Abstract: An elongate threaded rod member comprises a central portion, and two oppositely extending outer portions. The central portion is attached to the periphery of the first plate, is rotatable with respect to the first plate and is prevented from axial movement relative thereto. Each outer portion includes a threaded portion with each having the same threading pitch and density but being in opposite orientation. A threaded connector is secured to the periphery of each second plate with each threaded portion in screw-threaded relation. The threaded portions rotate within each bore an equal an opposite amount, equalizing the distances of each second mold plate from the first mold plate as the apparatus is moved between open and closed positions.

Abstract: A device for foaming around a transparent pane for a motor vehicle roof, including a top tool having a top shaping structure mounted on a top carrier, and a bottom tool having a bottom shaping structure mounted on a bottom carrier. The shaping structures act as a boundary for the area to be peripherally foamed, and the top tool and the bottom tool are made adjustable relative to one another for inserting or removing the pane and the interchangeable bottom shaping structure. The top shaping structure is also interchangeable to enable matching of the peripheral foaming device to different size and shape panes to be peripherally foamed.

Abstract: An injection-molding half-mold has a base plate (1), a nozzle-carrying plate (2), a cavity-carrying plate (3), and a hot runner (4) to which there are associated a plurality of resistive elements (6) connected externally to a power supply source via at least an electric conductor (9, 19) lead connected to an appropriate external connector.

Abstract: An optical disk exhibiting no detrimental thickness increase (edge wedge effect) that arises at the outer diameter of an optical disk substrate during an injection molding manufacturing process, and an apparatus and method for making such a disk. The optical disk of the present invention is designed for use with an optical disk player, especially where the data on the optical disk is stored air incident. This optical disk includes a disk substrate made from a molded polymeric material. The disk substrate has a first major surface, a second major surface, and an outer edge. The first major surface of the optical disk includes a data region having an intermediate portion and an outer portion. The outer portion extends to the outer edge of the optical disk. The disk substrate has a thickness defined by the distance between the first major surface and the second major surface. The optical disk also includes an information layer covering the data region.

Abstract: A vehicular lamp and injection mold and manufacturing method for lamp bodies for producing a plurality of different types of vehicular lamps while resulting in a reduced cost of manufacturing due to sharing of a common injection mold. A lamp body of a tail lamp, for example, includes a reflective surface for reflecting light from a light source bulb forward and is formed with a bulb attachment hole for mounting the light source bulb constituted by an insert-molded surface. That is, part of a reflective surface of the lamp body is formed by an insert-molded surface molded with a cavity surface of an insert constituting a part of a fixed mold of an injection mold. To change to molding a different type of lamp body, it is only necessary to change the insert.

Abstract: Injection-moulding machine for producing plastic containers, comprising an upper platen (1), a moving mould-carrying platen (2), a support bar (3) for lips constituted by two respective separable members (15a, 15b), a plurality of male members (6) applied to said upper platen (1), a cavity-carrying platen (4) in which there are provided removable means (16) adapted to delimitate the travel of said moving mould-carrying platen (2) towards the cavity-carrying platen (4), so that the moving mould-carrying platen (2) can be positioned at a pre-selectable distance with respect to the cavity-carrying platen (4). Said removable means (16) are referably constituted substantially by a number of resting cylinders, or parallelepipeds, arranged parallel with respect to each other and having the same height, the axis of which is parallel to the moving direction of the moving mould-carrying platen (2).

Abstract: A standardised modular system (100) for moulds of injection moulding machines comprises an injection assembly (1), an ejection assembly (5), a mould (2) comprising a fixed mould half (3) associated with the injection assembly and a movable mould half (4) associated with the ejection assembly (5) and movable from a mould closed position to a mould open position, male and female mould inserts (32, 42) mounted removably in special seats provided respectively in a female mould plate (30) and a male mould plate (40) of the fixed mould half and movable so as to be modularly composable and decomposable according to the item to be moulded, first adapter means (8) disposed interchangeably between the injector assembly (1) and the fixed mould half (3) so as to allow the arrangement of the injectors (16) of the injection assembly to be varied, and second adapter means (56, 66, 67, 83) disposed interchangeably between the ejection assembly (5) and the movable mould half (4) so as to allow the arrangement of the ejectors

Abstract: An injectio mold is provided which has a cavity plate, and a core plate. There are one or more insert slots in the cavity plate and the core plate. Each insert slot is capable of receiving an insert. The cavity plate and the core plate also have guide means thereon, which guide means are constructed and arranged so that, in use, an insert may be engaged with the guide means and moved along the guide means to the isnert slot.

Abstract: In a mold-closing unit a device for variably fixing the spacing between the stationary mold carrier and moveable mold carrier is provided, which device comes into operational connection with a guide element to fix a set spacing. Associated with the moveable mold carrier is a fixing device which, on actuation, fixes the moveable mold carrier in its respective position. The drive for moving the moveable mold carrier itself alters the spacing along a portion of the guide element when the fixing device is actuated and the clamping device is not operationally connected. Drive has at least two parts which are operationally connected with one another, of which one part is supported on a support element and the other part is connected to the moveable mold carrier. One of the two parts of the drive also extends in linear fashion in the closing direction during the closing movement as a linear movement means for the moveable mold carrier.

Abstract: The invention relates to an injection-moulding device for injection moulding of plastic objects, having a mould which defines a mould cavity, in which mould is provided a flow channel for the at least partially liquid plastic, which flow channel extends through a manifold and a number of nozzles connected to the manifold, wherein the flow channel contains a number of transverse separating surfaces between structural components, and at least one transverse separating surface is bridged by a sealing element in the flow channel, which sealing element is provided clampingly on the structural components.

Abstract: A support for a web forming machine which allows for vertical adjustment of a web forming belt with respect to at least one die head positioned above the web forming belt, and allows for tilting of the web forming belt. The support allows linear motion along a y-axis defined by a length of a guide shaft while preventing linear motion along a x-axis and a z-axis, e.g. the two axes perpendicular to the y-axis. Further, the support allows rotational or axial motion about the x-axis perpendicular to the y-axis but prevents rotational or axial motion about the y-axis and the z-axis.

Abstract: An object conveying device is provided that is capable of mounting an conveyed object such as a stamper, to a predetermined position while aligning it without deforming or damaging a conveyed object such as a stamper, a reference pin, and a molding die. This object conveying device includes a coil spring held to a case, an aligning bearing of which the outer ring is held to the coil, and a tray and a conveyed body adsorbing block that are held to the inner ring of the aligning bearing and that hold the stamper. The coil spring and the aligning bearing provide the tray and conveyed body adsorbing block with flexibility to positional variations.

Abstract: The machine comprises a pair of risers and a head comprising a plurality of operating roller units with rollers supported on the top and between the risers. According to the invention, the machine comprises a cover pivotally mounted by a pin with respect to the risers and over the head so to at least cover the gap on the top and on the front between the risers, in which the operating units are arranged in its closed position. Cams are functionally associated to the cover and cam trackers are functionally associated to a micro switch. The micro switch is electrically connected to the electrical power circuit of an electrical geared motor of the machine so that the micro switch electrically closes the electrical circuit only when the cover is correctly and completely closed and consequently the electrical geared motor of the machine can be turned along with the operating unit rollers only in this condition.

Abstract: A mold half-block possesses at least one mold recess defined transversely by the working face of a shell provided with heat-transfer parts that are intrinsic and both-way (both heating and cooling), the shell including a base that receives all of the heat-transfer parts and a removable insert fitted on the base and carrying the working face, the insert having no intrinsic heat-transfer parts and being thermally regulated solely by heat transfer with the base. The insert is in the form of a cap which fits over at least a head portion of the base, and the heat-transfer parts of the base are allocated to the head portion of the base having the insert fitted thereover.

Abstract: A weir assembly is disclosed in which the size and shape of the opening can be easily changed, by utilizing a sizing insert system. In one embodiment, the sizing insert comprises a mechanical iris. The position of the opening is easily adjustable by utilizing at least one positioning stage that is fastened to the sizing insert. Spring plungers are utilized for retention of the transparent weir plate within the vertical channels of a water trough. A center-finder is utilized to approximately position the opening in relation to an extrusion die.

Abstract: Each inside surface of an injection molding press is attached to a static frame and ejector frame, respectively. The static frame is attached to a removable static mold assembly and the ejector frame is attached to a removable ejector frame assembly. The static mold assembly consists of a static cavity mold housing removably attached to a back plate. The ejector frame assembly consists of an ejector cavity mold housing removably attached to an ejector back plate assembly. The system only requires a change in the static and ejector cavity mold housing when changing molds for different plastic components. The static mold assembly and ejector mold assembly is attached by a yoke in a runner bar slot in a front portion of each respective static and ejector frame.

Abstract: An injection molding machine is provided with a multi-piece machine base comprising at least two adjacently positioned components. A stationary mold carrier can be fixed to the one component of the machine base. To obtain an easy assembling which meets the demands during production, the components of the machine base can be connected underneath and in the vertical projection of the stationary mold carrier independently from each other.

Abstract: A system for molding optical attenuators that have a lens portion and a supporting portion includes a molding machine containing a mold, an extractor robot and optical inspection portion, and a controller that assesses the inspection information and send control signals to the molding machine and mold. The mold includes a cavity and a core which define a space in which the supporting portion and the attenuator are formed. The mold also includes a core pin, movably located in the core element. The core pin has a proximal end defining a surface of the lens portion and a distal end remote from the molding space. A core pin motor is coupled to the core pin, through a number of intermediate elements, so that the core pin can be moved relative to the core element to adjust a thickness of the lens portion.

Abstract: A guide block assembly is provided for retaining fiber bore forming pins and guide pin bore forming pins in precise relation to each other during the molding of a ferrule used in a multi-fiber connection. The assembly may include a top portion and a bottom portion with corresponding fiber and guide pin bore grooves formed on a surface of the top and bottom portions. When the top and bottom portions are assembled, the corresponding fiber and guide pin bore grooves form fiber and guide pin bores, respectively. The assembly may also include another portion that form additional bores with either the top or the bottom portion. A method of fabricating and aligning the guide block assembly is also disclosed.

Abstract: A clamping apparatus 30 has a driving plate 31 provided with a securing device 40 for securing tie rods 13 in a predetermined position in the axial direction, and a clamping drive device 50 for pressing a movable platen 12. The driving plate 31 is guided by guide bars 15, secured to the movable platen 12, in the axial direction. Rear parts of the guide bars 15 are secured to an adjusting plate 32 which is provided with a positioning means 60 for adjusting and holding a distance S between the driving plate 31 and the movable platen 12.

Abstract: In the method, after the pattern-bearing film is fed to the female mold, the distal end of the film is fixed under a lower portion of the female mold, and at the same time the film is retreated by a force from the film supply portion. Thus, this tightens up the film so that the slacks or wrinkles cannot be formed on the film. Therefore, the film can be fortunately spread around the parting surface of the female mold. In the apparatus, the film suppressing frame is pressed to the female mold through the sliding rod arranged in the female mold, in such a manner that the female mold embraces the frame. Thus, the pressing of the frame is performed by a simple structure, and the film is accurately positioned to the internal surface of the female mold. Also, the film suppressing frame is constituted to advance from and retreat to the female mold. Thus, this causes a space between the both molds and an outside standby position to be useless. A space around the apparatus can be effectively utilized.

Abstract: The invention relates to a rotating nozzle structure of an extruder which comprises a rotatable nozzle, a die, which rests against the extruder frame and which comprises an annular front surface on the nozzle side, and a sealing plate, which is arranged between the front surface of the die and the nozzle and pressed tightly against the sealing surface of the nozzle to seal the nozzle with respect to the die. According to the invention, the die is arranged to slide in the axial direction with respect to the extruder frame and comprises a flow channel, which is under pressure of the material to be extruded and tapers conically towards the nozzle, and that the ratio of the area (Atiiv) of the die's annular front surface to the area (Aproj) of the projection surface of the flow channel's conical section is between 0.1 and 10.

Abstract: A mold interlocking device that includes a first portion attached to a mold half that has a head with a channel and an insert therein that is received in a pocket of a receptacle of a second portion that is attached to another mold half. In one embodiment, the head comprises sidewalls each with channels that receive a replaceable insert therein. Preferred inserts include rollers, plates, plates with lubricating plugs, and plates comprised of layers. In one embodiment, each sidewall of the head has a tapered section disposed between a mounting base and a straight section and each pocket is defined by a complementarily contoured sidewall. In another embodiment, each head sidewall further includes a second tapered section adjacent the free end of the head.

Abstract: An apparatus for molding and a molding method utilizing a moveable mold platen which may hold, have affixed to, or carry a first portion of a mold or molds. A second or door platen may hold, have affixed to, or carry a second portion of a mold or molds. The door platen is placed in its closed position, and the moveable mold platen is brought up adjacent to it, so that the two portions of the mold are brought into engagement with one another. A desired molding material is injected into the mold cavity, after which the moveable platen is retracted, the door platen is opened, and the part is removed. A part to be encapsulated may be placed into the mold before the two portions of the mold are brought into engagement.

Abstract: Method and apparatus for exchanging a die holder of an extruder, which is tightly pressed from the bottom against a lower surface of an extrusion head by a press member. The pressing force of the press member is reduced to form a gap between a used die holder and the extrusion head. The used die holder and a next die holder positioned collinearly with each other are moved simultaneously and longitudinally, while slidingly contacting both of these die holders with the press member, so as to eject the used die holder from the press member and to deliver the next die holder onto the press member. The next die holder is then tightly pressed from the bottom onto the lower surface of the extrusion head by the press member.

Abstract: An injection molding apparatus comprises a cell assembly that has a tiered frame. The tiered frame is provided with lower unit storage sections and upper unit storage sections. The lower unit storage sections are provided with holders, individually, and injection molding machine units are mounted on the holders, individually. The upper unit storage sections are provided with holders, individually, and injection molding machine units are mounted on the holders, individually. Material supply pipes, temperature control piping, etc. of the injection molding machine units are arranged in a layout space on the side of a back portion of the cell assembly.

Abstract: The manufacturing apparatus of a resin molded product has a feed block that sets a layer configuration of the resin molded product obtained by molding a plurality of molten resins. The feed block includes a feed block body having a through hole, and a plurality of replacement blocks that are removably fitted into the through hole and have layer configuring passages corresponding to different layer configurations. A replacement block before change is pushed out of the through hole by a replacement block having a layer configuring passage corresponding to a layer configuration after change, thereby changing the layer configuration. This allows an easy change of a layer configuration, and in particular, prevents degradation of resin due to heat or oxidation, and reduces time for the change and a material loss even when a significant change of the layer configuration such as a change of a layer arrangement is performed.

Abstract: The inventions relates to an extrusion apparatus suited for water-containing products which heat-expand by internal boiling of water by pressure relief after passing through extrusion nozzles. The apparatus comprises a) an extruder, which at the outlet end thereof comprises a nozzle plate, b) a pressure-controlling chamber for controlling the pressure on the outlet side of the nozzle plate, said pressure-controlling chamber possibly containing a cutting-off unit, and c) a sluice unit downstream of the pressure controlling chamber. The apparatus furthermore comprises that the pressure-controlling chamber and sluice unit being releasably interconnected and at least the sluice unit being mounted movably in and out of the product stream.

Abstract: A fermented or yeast leavened dough is continuously fed to a plurality of nozzles and extruded and twisted into a plurality of continuous twisted dough ropes without substantially increasing the density of the dough. The dough is fed to the nozzles by an extruder or pump which supplies the dough at a substantially constant pressure without substantial surging of the dough. Each nozzle may produce a plurality of dough ropes which are twisted together to form a continuous twisted dough rope. By avoiding a substantial increase in dough density during extrusion and twisting, a hard, glassy texture in the baked product is avoided and a crispy, non-vitreous texture is achieved. The dough twisting apparatus includes a manifold having a plurality of dough passageways and extruder pipes which extend from the downstream ends of the dough passageways. A rotary die cup is mounted on each of the stationary extruder pipes. Each die cup contains one or more die orifices.

Abstract: A molding method and apparatus is shown which utilizes a plasticizing or injection unit in combination with a horizontal booking press having a first or moveable mold platen carrying a first portion of a mold or molds, and a second, or fixable, door platen carrying a second portion of a mold or molds. The door platen swings open and closed on a hinge, and is fixable in its closed position. When the moveable mold platen is in its′ closed position adjacent the fixed position of the door platen, a mold cavity is formed by the first and second portions of the mold or molds, and material is injected into the mold cavity.

Abstract: A device for clamping electromagnetically molds of the injection molding machine comprises a stand on which a fixed board and a guiding mechanism are mounted. A movable board is slidably mounted on the guiding mechanism to slide back and forth in relation to the fixed board. The fixed board is provided with a male mold mounted thereon. The movable board is provided with a female mold mounted thereon. The sliding motion of the movable board toward the fixed board brings about the mold opening action, the mold closing action, and the mold locking action. The movable board and the fixed board are provided with a magnetic force generating mechanism for effecting attraction or repulsion between the movable board and the fixed board. The attraction serves to effect the mold closing action and the mold locking action. The repulsion serves to effect the mold opening action.

Abstract: Proposed is a device for continuously producing seamless plastic tubes, wherein provided as a distributor element for the molten material to be fed to an annular gap is a distributor plate which is arranged within the cross-section of the mold cavity and in which the molten plastic material is passed to the peripheral surface of the distributor plate substantially radially with respect to the direction of production by way of distribution passages which branch tree-like, wherein the flow path of the molten plastic material is the same in each of the individual distribution passages between the entry opening and the peripheral surface

Abstract: A mold apparatus provides a movable mold module which includes movable tie rods which are extendable and retractable with respect to the movable mold module of the mold apparatus, such that the tie rods may initially be removed from a gap between the platens of the mold apparatus when the platens have been separated. Preferably, the tie rod assemblies are movably mounted to the movable carriage or module, which also moves the injection machine and movable platen along a base toward and away from the fixed platen and corresponding mold part. Additionally, the tie rods may be extended relative to the movable platen as the platen is moved toward the fixed platen, such that the tie rods engage a locking member on the fixed platen to lock the platens relative to one another during the molding process. The tie rods are rotatable via a rotational device mounted at the movable platen, to rotate the tie rods and lock the tie rods to the locking member at the fixed platen.

Abstract: The present invention includes an extrusion line system capable of simultaneous running and retooling. The invention utilizes a turret device having an upper surface adapted to rotate about a central point. The turret device has on its upper surface a first and second production line portion. The production line portions are positioned on the upper surface such that when the turret device is in one position the first production portion may be used with an extrusion device. When the turret device is in a second position, the second production portion may be used. This approach allows retooling of one of the production portions while the other production portion is running on the line.

Abstract: A mold base system for injection molding machines comprises two cast mold bases each with interior lugs. The lugs of each mold base removeably hold an insert. The inserts are machined to define a cavity that is the negative of the part to be molded. The inserts can be changed to suit different parts without changing the mold bases, which can stay on the injection molding machine indefinitely. Ribs connect the lugs to the mold base outside walls. Two ribs and an outside wall define a pocket that provides access to an insert. The ribs are notched to enable coolant lines to be routed without interference inside the mold base. The mold base system further comprises an ejector plate and a cap. The cap is changeable to suit different configurations of the ejector pins without changing the ejector plate.

Abstract: A homogeneous sash or fenestration unit is shown which may be made of a wide variety of materials, and holds a first and a second pane of glazing material in a parallel, spaced apart, relationship without the use of spacers or a preassembled glazing unit. A novel method and apparatus for making the sash or fenestration unit may use a double door horizontal booking press with fixed or adjustable molds.

Abstract: An extruder die head comprises an internal cylindrical mandrel and a shell, which encloses said mandrel concentrically. Between said mandrel and shell an annular channel is formed that empties into the die slit. A polymer melt is fed through a line to the annular channel. To prevent the polymer melt in the area of the start of the annular channel from penetrating into a slit that forms between the mandrel and the shell due to heat expansion, there is between both mandrel and shell a ring with such a coefficient of thermal expansion that when heated up due to the polymer melt said ring seals the slit between the shell and the mandrel.

Abstract: An extruding machine for making multi-color mesh belts includes an injection block which has a single material feeding inlet and a material feeding tube which has a plurality of equally spaced material feeding passages. Each feeding passage has a color injection opening which engages with a color injection device. The formed mesh belts may have strips of different colors. The bottom end of the feeding tube may engage with a dividing block for controlling melting degree of the injecting color material.

Abstract: A mold interlocking device that includes a first portion attached to a mold half that has a head with a channel and an insert therein that is received in a pocket of a receptacle of a second portion that is attached to another mold half. In one embodiment, the head comprises sidewalls each with channels that receive a replaceable insert therein. Preferred inserts include rollers, plates, plates with lubricating plugs, and plates comprised of layers. In one embodiment, each sidewall of the head has a tapered section disposed between a mounting base and a straight section and each pocket is defined by a complementarily contoured sidewall. In another embodiment, each head sidewall further includes a second tapered section adjacent the free end of the head.

Abstract: The invention discloses a marking device for a mould having a housing in a wall. The device includes a threaded cylindrical body and a circular head of a diameter about equal to the diameter of the housing. A face of the head opposite to the body includes structure that turns the head and a marking distinct from the structure and independent from the position of the structure. A length of the body and head are less than the length of the housing in the mould in order that the face with the marking lies flush with the internal face of the wall of the mould when the device is in the housing.

Abstract: The present invention discloses a single mold structure for fabricating multiple external network adapters. The casing of the network adapter is produced by a single mold structure having multiple surface design of an interchangeable mold core. The interchangeable mold core can be replaced by another interchangeable mold core having different surface pattern during a manufacture interval. It can save a lot of time to change the mold core while producing and shorten a lot of time for creating molds during research and development stage. Finally, it can make the product come in more efficiently and can satisfy the customer requirement.

Abstract: A molding device has a first outer mold, a second outer mold engaging with the first outer mold, a silicon mold disposed between the first outer mold and the second outer mold, a center mold, an upper ring, and a lower seat. The first outer mold has a first inner thread, a first upper flange, a first upper inner groove, a first middle flange, a first lower flange, a first bottom base, and a first lower inner groove. The second outer mold has a second inner thread, a second upper flange, a second upper inner groove, a second middle flange, a second lower flange, a second bottom base, and a second lower inner groove. The lower seat is inserted in the first lower inner groove of the first outer mold and the second lower inner groove of the second outer mold. The upper ring is inserted in the first upper inner groove of the first outer mold and the second upper inner groove of the second outer mold. The center mold passes through the upper ring and the silicon mold.

Abstract: In a modular mold assembly first and second mold frame halves used to define at least one aperture extending therethrough, the apertures cooperating to define a mold module cavity when said first and second halves are assembled. At least one mold module slidingly receivable in each of the apertures and can be locked therein securing the mold module within the mold cavity in response to the first and second halves being in engagement with one another. Upon separation of the mold halves, the modules are released and can be removed.

Abstract: A modular molding system having: an upper frame assembly configured for receiving a cavity module therein; a lower frame assembly configured for receiving a core module therein, the lower frame assembly including a two-stage master ejector system; a cavity module positioned within the upper frame assembly; and a core module positioned within the lower frame assembly, the core module including a two-stage ejector system having a plurality of ejection elements associated therewith; wherein the core and cavity modules together define a molding cavity for molding a workpiece therein, and wherein the master ejector system is operable to drive the ejection elements of the core module.

Abstract: A device for controlling the flow of plastics material, heated until flowable, through a housing, in particular a filtering device or a direction-control device for the plastics material, comprises a flow channel extending through the housing, and a plunger of circular cross-section longitudinally displaced in a bore of the housing transversely to the longitudinal direction of the flow channel. The plunger crosses the flow channel. An unslotted scraper ring is mounted outside the housing on a portion of the plunger projecting from the housing and is held by a stop so that the plunger is displaceable relative to the scraper ring. The inner diameter (d2) of the scraper ring is smaller than the diameter (d0) of the bore of the housing and also smaller than the diameter (d1) of the end of the plunger portion remote from the housing in the coldest operating state of that plunger portion.

Abstract: A casting tool for an air intake duct includes a mold and exchangeable extractable cores for the formation of a cavity. The exchangeable extractable cores are provided for the mold, by which, while retaining the mold as such, different air intake duct geometries, especially different air intake channel cross sections, can be produced. In this manner a plurality of intake duct variants can be produced at substantially constant tool costs. This permits the economical use of injection molded synthetic resin air intake ducts, since the very expensive casting tools can be provided for a sufficient number of air intake ducts.

Abstract: A mold-thickness adjustment mechanism is provided which uses intermediate toothed wheels engaging with a pair of toothed wheels on a tie-bar side. The mechanism includes a toothed wheel on an outer surface of a pressure-receiving plate and toothed wheels with a large diameter for mold-thickness adjustment provided together with a toothed wheel-driving motor on the side of the pressure-receiving plate on the central portion of an outer surface of the pressure-receiving plate. Intermediate toothed wheels are arranged between the toothed wheels with the large diameter and a pair of toothed wheels of one side of the pressure-receiving plate to engage each other. A pair of the toothed wheels is designed to rotate by rotation of the intermediate toothed wheels at the same time, whereby a diameter of the toothed wheel with the large diameter is constituted approximately equally to the breadth of the plate body of the pressure-receiving plate.