摘要:
A method of feeding a composite molten resin capable of easily forming amulti-kind-multi-layer preform. An apparatus for feeding the composite molten resin has a nozzle portion which includes an outer discharge port in which an outermost annular flow path through which a main layer-forming molten resin flows, meets an outer annular flow path through which a sub-layer-forming molten resin flows inside of the outermost annular flow path; and an inner discharge port in which a shell layer-forming molten resin annularly flowing inside of the outer conflux path, meets the core layer-forming molten resin flowing inside the shell layer; the outer discharge port and the inner discharge port being arranged in this order from the downstream toward the upstream in a direction in which the molten resins flow; wherein provision is made of a shaft-like opening/closing valve for opening and closing the inner discharge port, and a gear pump for intermittently discharging the sub-layer-forming molten resin.
摘要:
A process for the manufacturing and filling of plastic containers, said process comprising the steps of: a. positioning a preform (1) with relation to a mold assembly of two or more components (20, 21, 22), said preform generally being fabricated from a plastic and being provided with a longitudinal axis (17); b. stretching said preform along its longitudinal axis (17); c. injecting a fluid (29) into the interior volume (6) of the preform (1), said fluid (29) being under such pressure as to cause the preform (1) to plastically deform until achieving the desired size and shape; and d. releasing said container from the mold assembly (20, 21, 22) and sealing the container.
摘要:
A technical problem of this invention is to control the behavior of an intermediate layer in the preform bottom at high productivity and in a high degree of accuracy in the injection molding of a preform having a second-resin layer laminated with main-resin layers. A principal means of this invention to solve this technical problem is a process for injection molding a preform in a test tube shape having an intermediate layer of a second-resin layer laminated with main-resin layers. This process comprises the steps of: supplying a main resin from an outer flow channel and an inner flow channel to a joined flow channel at a predetermined supply velocity for a predetermined period of time; supplying a second resin from a middle flow channel to the joined flow channel simultaneously with the main resin at a predetermined supply velocity for a certain period of time within the predetermined period of time; and sliding a shut-off pin to bring the pin forefront to a predetermined position near an outlet of the inner flow channel, which is open to the joined flow channel, previously before the second resin is supplied, or during a period of time starting after a predetermined time from the start of the second resin supply and ending with the termination of the supply, so that the velocity of main resin supply from the inner flow channel to the joined flow channel is reduced to a predetermined level by adjusting the degree of aperture for the outlet.
摘要:
A mold device for forming a plastic container from a preform. The preform includes at least one exterior feature formed thereon. The mold device comprises a mold defining a mold cavity, and a central exterior rod being movable within the mold cavity. The central exterior rod includes a locating feature formed therewith that is engagable with the at least one exterior feature of the preform for maintaining a central orientation of the preform within the mold cavity during forming.
摘要:
The present invention relates to a preform (1), and resultant container (10), having at least a first layer (2) and a second layer (3) which forms an outer layer, relative to the first layer (2). The inner layer (2) comprises a pearlescent agent, while the outer layer (3) comprises a colorant, such that the resultant container (10) has a high gloss finish, is easy to manufacture, and does not result in colorant leaching into the contained fluid.