摘要:
A system in which gravitation and inertial effects on platen verticality and sagging are compensated by an anti-tilt actuator (68, 70). A hydraulic actuator (68, 70) secured beneath the platen is either set to offset only gravitationally-related sagging of the mold half (60, 62) by providing a compensating upward force (relative to a stable clamp base 80), or otherwise its upward force can be dynamically adjusted also to compensate for swaying or tilting of the mold-platen assembly caused by stroke cylinder (98) operation and related inertia/momentum effects. Preferably, a level sensor (94) measures and communicates a degree of horizontalness/verticality of the platen (48, 50) to a machine controller (88) which, in turn, generates a control signal (87) to cause variation in cylinder pressure in the anti-tilt actuator (68, 70), thereby achieving substantially continuous alignment between the mold halves (60, 62) and reduced component wear.
摘要:
Described herein is a mold. The mold includes a first mold half and a second mold half. A molding cavity is definable between the first mold half and the second mold half within which a molded article is moldable. The mold also includes a core configured to form a seal on the molded article. The first mold half and the second mold half are configured to remain in a mold closed configuration with molding and stripping of the molded article.
摘要:
Disclosed is a mold carrier having: a first external surface and a second external surface being located opposite the first external surface, arranged to mount, in use, respective mold halves; a main hot runner channel; first and second hot runner nozzles in a back-to-back configuration, the first and second hot runner nozzles having bases and connected to the main hot runner channel to receive, in use, molten plastic therefrom, the first and second hot runner nozzles each having a substantially planar sealing surface configured to provide an interface, in use, to a substantially planar interface surface in the respective mold halves; and springs operatively mounted between the nozzle bases and nozzles to spring-load the nozzles against the mold halves for improved sealing sprue bushings being received in the mold halves; and mold locating rings being received by the first external surface and the second external surface, the mold locating rings being configured to locate and position the mold halves relative to the first and second hot runner nozzles and of the sprue bushings, and the mold locating rings aligning and locating with a selected one of the mold halves so that the first and second hot runner nozzles may touch the sprue bushings.
摘要:
Discloses is: (i) a molding-system lock, (ii) a molding system having a molding-system lock, and/or (iii) a method of a molding-system lock, amongst other things.
摘要:
A linkage assembly for a multiple level stack mold molding machine having a fixed platen, a movable platen, a plurality of carriage assemblies. The linkage assembly includes an arm on each carriage assembly pivotally connected to a central pivot point on one of the carriage assemblies. An arm also extends between the fixed platen and an end of one of the arms on a carriage assembly. Another arm extends between the movable platen and an end of another of the arms on another of the carriage assemblies. A pair of arms extend between each adjacent carriage assembly, each one of the pair of arms extends from an end of an arm of one carriage assembly to a central pivot point on an adjacent carriage assembly. Each arm of the pair of arms is shaped to extend around a periphery portion of a mold opening to enable full access to the core and cavity plates.
摘要:
Embodiments of the present invention teach a molding apparatus for producing a molded article from a molding material. The molding apparatus comprises an inner core (108) and an outer core (110) for defining a portion of a molding cavity (106) for defining the molded article: the inner core (108) including a compensator (120), the compensator (120) being configured to: retract to a retracted position responsive to the pressure of the molding material being injected into the molding cavity (106); and extend to an extended position responsive to the shrinkage during solidification of the molding material in the molding cavity.
摘要:
A check valve for a screw is provided. The check valve includes a retainer tip, operable to be attached to a distal end of a screw shaft, the retainer tip defining at least one melt channel. A first ring is coaxially mounted to and rotationally-coupled with the retainer tip. A second ring is coaxially and slidably mounted to the retainer tip, and is operable to rotate relative to the retainer tip. The second ring is operable to reversibly move between an open position which permits melt to flow through the check valve and a closed position which prevents backflow of the melt.
摘要:
A molded article transfer device (150, 250) is described herein that is associated, in use, with an injection mold (100, 200). The molded article transfer device (150, 250) includes a transfer structure (151, 251) that defines, amongst other things, a first aperture (154A) that is structured to receive a first molded article (102A) from a first mold stack (106A, 206A) of the injection mold (100). The transfer structure (151, 251) also defines a first branch channel (156A) and a first trunk channel (158A) through which the first molded article (102A) is passable. The first branch channel (156A) connects the first aperture (154A) with the first trunk channel (158A) for passing, in use, the first molded article (102A) thereto, whereafter it passes through the first trunk channel (158A) towards an exit (164A) thereof.
摘要:
A platen (50) for a molding machine includes an intermediate support structure (20) between two planar walls (16, 18) having ribs (40) arranged at a non-normal angle β to a first wall (18). The ribs (40) couple forces from the first wall (18) to the second wall (16) in such a way that bending of the second wall (16) is resisted. This adds to the rigidity of the second wall (16) and hence the platen (50), adding to flatness of the arrangement. Gussets (42) may be provided extending between the ribs (40) and the intermediate support structure (20). This has the effect of surrounding and supporting an injection bore (14) and further adding to the coupling of forces to the edge portions of the second wall (16) to resist forces acting to bend the wall.
摘要:
A injection unit (10) of an injection system, including a shooting pot (12) having a shooting pot head (13) at one end, defining a melt chamber (14) therein; a melt inlet channel (16) for laterally bringing melt into the melt chamber (14); a plunger (26) arranged in the melt chamber (14), the plunger (26) being linearly moveable from a retracted position into an extended position, so as to force melt accumulated in the melt chamber (14) through a melt outlet channel (20) arranged in said shooting pot head (13) into an injection mold; an annular melt passage (28) provided between the melt chamber (14) and the plunger (26), for allowing the melt to flow from the melt inlet channel (16) to an outlet end (18) of the melt chamber (14); and a melt distribution channel (30) for distributing the melt from the melt inlet channel (16) to the annular melt passage (28). An important aspect of the invention is that the melt distribution channel (30) be distal from the melt inlet channel (16) so as to ensure even distribution of the melt to the annular melt passage (28).