Abstract:
The invention relates to a device for injecting material in a plastic state into a moulding cavity. The inventive device comprises a distributor (11) for said material in a plastic state and an injection nozzle (10) which is connected to the distributor (11) by a detachable connection means (31) and has a front surface (78) which is formed in such a way that it can become integral with the moulding cavity (2). In order to enable the front surface (78) to be positioned in such a way as to permit said integral connection when the nozzle (10) is assembled and re-assembled after dismounting, indexing means (49, 54, 57, 59, 90, 95, 99) are provided for the angular position of said front surface (78) in relation to the distributor, along with locking means (31, 85) fixing said front surface (78) in relation to the distributor (11) in a relative angular position which is imposed by the indexing means (49, 54, 57, 59, 90, 95, 99).
Abstract:
Bei einer Spritzgussdüse, insbesondere Heißkanaldüse (7), zur Anordnung in einem Spritzgießwerkzeug (11), das in Abhängigkeit von der Konfiguration eine größere Anzahl von Platten aufweist und an seiner festen Werkzeugseite (I) zumindest eine Rück- bzw. Werkzeugaufspannplatte (4) sowie eine Verteilerplatte (5) und an seiner beweglichen, trennbaren Formseite (II) zumindest eine Kavitätenplatte (2) besitzt, an deren Formnest (3) eine Düsenspitze (8) zum Einsatz kommt, wobei die Heißkanaldüse (7) an ihrem von der Düsenspitze (8) entfernten, hinteren Ende ein mit einem Gehäusebund (11) versehenes, hohlkörperförmiges Flanschgehäuse (18) besitzt, das ein Materialrohr (20) mit einem in der Düsenspitze (8) mündenden Strömungskanal (9) für eine Materialschmelze aufnimmt, sowie mit Anschlüssen für eine Heizung (16) und/oder Kühlung und für Temperaturmessfühler (17) versehen ist, ist das Materialrohr (20) an seinem hinteren Ende über einen begrenzten Längenabschnitt (21) seiner Außenmantelfläche einstückig mit dem Flanschgehäuse (18) an dessen Innenmantelfläche verbunden.
Abstract:
Eine Spritzgießvorrichtung (10) hat wenigstens einen Verteiler (20) und wenigstens eine Spritzgießdüse (30), wobei jede Düse (30) mit einem Halteelement (40) an dem Verteiler (20) festlegbar ist. Um eine schnelle Montage und eine dauerhafte Abdichtung aller Düsen an dem Verteiler zu ermöglichen, weist das Halteelement (40) wenigstens ein Zentrier- und/oder Fixierelement (50) auf, das längsverschieblich gelagert ist und in endmontierter Stellung mit dem Verteiler (20) derart in Eingriff bringbar ist, daß dieser und die Düse (30) zueinander lagefixiert sind. Das Halteelement (40) hat wenigstens eine Ausnehmung (41) zur Aufnahme der Düse (30) und wenigstens eine weitere Ausnehmung (42) zur Aufnahme des Fixierelements (50), wobei letzteres in der weiteren Ausnehmung (42) längsverschieblich gelagert ist. Bevorzugt ist das Fixierelement (50) ein Befestigungselement für das Halteelement (40), insbesondere ein Teil einer Schraubverbindung (14).
Abstract:
A seal (44) is provided between a nozzle (20) and a manifold (12). The seal (44) provides a melt channel between an outlet (18) of manifold (12) and a nozzle channel (22). The seal (44) has higher thermal expansion coefficient than both the nozzle (20) and the manifold (12) to provide an improved seal between the manifold (12) and the nozzle (20) when the injection molding apparatus is at an operating temperature.
Abstract:
An apparatus and process for injecting molten plastic material includes a nozzle assembly (10) through which plastic material flows and including a nozzle body (12) with a heater (24) affixed thereto. A mold cavity plate (36) is positioned adjacent the nozzle body (12) and is separable from the nozzle body (12) so that separation of the mold cavity plate (36) from the nozzle body (12) exposes the nozzle body (12) and permits removal of the nozzle body and the heater (24).
Abstract:
Multiple nozzle injection molding apparatus wherein each heated nozzle (10) is screwed into a socket (48) in a mounting base (50) secured in place adjacent a melt distribution manifold (10). Each heated nozzle (10) extends through an opening (60) in the manifold plate (24) and has a nut-like engageable portion (76) extending forwardly of the cavity plate (26). This allows each of the heated nozzles (10) to be easily removed for cleaning or replacement without removing the manifold plate (24).
Abstract:
A nozzle retention arrangement is provided for an injection molding manifold system, such as a hot runner manifold system. The nozzle retention arrangement couples an injection nozzle to a distribution manifold in a manner that locates the nozzle in its final operating position and applies an initial assembly load to retain the nozzle in position on the manifold to facilitate installation of a manifold system into a manifold plate. The nozzle retention arrangement may provide a compliant load application feature to limit sealing surface pressure between the nozzle and the manifold to prevent surface damage between the components, while also accommodating thermal expansion of the heated components during operation of the system. The nozzle retention arrangement may also provide a load control feature to prevent the machining quality of the nozzle bore in the manifold plate from determining the sealing load between the nozzle and the manifold.
Abstract:
A mold-tool system (100) of a runner system (150), the mold-tool system (100) comprising: a manifold extension (102) being configured to couple with a manifold assembly (152) of the runner system (150); and a biasing assembly (106) extending from the manifold extension (102), the biasing assembly (106) being configured to arrange, in use, sealing contact between the manifold extension (102) and a nozzle assembly (156).
Abstract:
A hot runner unit capable of easily attaching and detaching a hot runner part of various types of hot runner metal molds, wherein at least a heater and a hot runner nozzle are assembled integrally through a holding block, whereby the hot runner part can be attached and detached as a unit from the hot runner metal mold and, thus the hot runner part can be assembled easily to the hot runner metal mold and provide flexibility to various types of the hot runner metal molds so as to enable production at low cost by mass-production.
Abstract:
A nozzle retention arrangement is provided for an injection molding manifold system, such as a hot runner manifold system. The nozzle retention arrangement couples an injection nozzle to a distribution manifold in a manner that locates the nozzle in its final operating position and applies an initial assembly load to retain the nozzle in position on the manifold to facilitate installation of a manifold system into a manifold plate. The nozzle retention arrangement may provide a compliant load application feature to limit sealing surface pressure between the nozzle and the manifold to prevent surface damage between the components, while also accommodating thermal expansion of the heated components during operation of the system. The nozzle retention arrangement may also provide a load control feature to prevent the machining quality of the nozzle bore in the manifold plate from determining the sealing load between the nozzle and the manifold.