A molding apparatus includes: a die provided with a die recessed portion; a core being relatively movable toward a first side and a second side in an axial direction of the die, and forming a flow passage for molten resin between the core and the die; a slider housed in the die recessed portion, having a gap in the die radial direction between the slider and the die recessed portion, the slider being slidable in the die axial direction; and a wall portion forming part of an inner wall in the die radial direction of the die recessed portion, positioned to oppose the core, and extending in such a way that a thickness of the wall portion gradually decreases heading from the first side toward the second side; wherein the wall portion is elastically flexible outward in the die radial direction in a case in which the wall portion is pushed by the molten resin.

A vertical additive processing system for use with a blow molding machine having a flow head from which a plastic parison is delivered to a mold and producing an article. The system has a servo-controlled accumulation technology (SCAT) unit including (a) an accumulator collecting plastic material when retracted and delivering plastic material when extended, and (b) an actuator directing the accumulator to retract and extend. The system further has a tooling unit including a bushing body adapted to engage the flow head, a distribution ring, a bushing cap, a central aperture defining a main parison flow path, and a distribution channel delivering additional plastic material received from the accumulator to the main parison flow path. The system still further has a material duct connecting the two units through which plastic material delivered by the SCAT unit is transported to and received by the tooling unit.

An extrusion blow molding method includes detecting an exit velocity of a tube exiting a head during a blow molding cycle for forming the tube. A melt accumulator receives part of the melt conveyed by an extruder or discharges melt in addition to the melt conveyed by the extruder in dependence on the detected exit velocity. The melt accumulator discharges melt if the detected exit velocity is less than a target value for the exit velocity and receives melt if the detected exit velocity is greater than the target value for the exit velocity.

A manufacturing method for a blow-molded panel and a blow molding equipment are provided. The blow-molded panel is a double-layer structure or a multilayer structure and is formed by means of blow molding, wherein respective layers thereof can be made of different materials so that the blow-molded panel has relative good performance.

A nozzle tool system for extrusion blow molding has an intermediate module and at least first and second nozzle outlet units, each forming an adjustable nozzle outlet gap between a mandrel extending axially and a deformable sleeve. The units can be connected with the intermediate module as replacements for one another, and have a first outlet diameter and a larger second outlet diameter different from one another. At least one setting drive for reversible deformation of the sleeve is arranged on the intermediate module and can be connected with the deformable sleeve by way of a releasable coupling arrangement. The first nozzle outlet unit delimits a first setting path of the setting drive, using at least one inner mechanical stop, and the second nozzle outlet unit delimits a second setting path of the setting drive, greater than the first setting path, using at least one inner mechanical stop.

A manufacturing method for a blow-molded panel and a blow molding equipment are provided. The blow-molded panel is a double-layer structure or a multilayer structure and is formed by blow molding, wherein respective layers thereof can be made of different materials so that the blow-molded panel has relatively good performance.

The invention relates to an extrusion head and a method with which the thickness distribution of hollow bodies, for example, can be further improved. The extrusion head consists of at least one mandrel (1) and one nozzle (2), which have a rigid geometry and therefore cannot be varied or can also be deformed flexibly in some areas and form a flow channel (3), wherein the positions of the mandrel (1) and the nozzle (2) can be varied relative to one another, so that the geometry of a discharge gap (s) of the flow channel (3) can be varied while a melt is being discharged, wherein each head part has at least one head section with a uniform cross-sectional area in a discharge area (A) of the extrusion head, and wherein at least one head part has at least two head sections (B) and (C), each of which has a predominantly uniform cross-sectional area within the head section (B), (C), which are spaced axially apart from one another and which have mutually different cross-sectional areas.

A process for manufacturing a plastic hollow body including extruding a molten plastic parison through a die. At least one longitudinal cut is made in the parison. The parison is introduced into a mold comprising two cavities. The hollow body is molded by conforming the parison to the mold cavities. The die includes a passage for the molten plastic which gradually modifies the shape of the parison so that it is substantially flattened on exiting.

Provided herein is a blown film material comprising base polymer and an active agent that acts on, interacts or reacts with a selected material. The active agent may be a desiccant material capable of absorbing moisture. The resulting blown film material will have useful applications. Also provided herein are related methods of manufacture.

Amendments to the abstract were made herewith to correct minor informalities with the parent application. A clean copy of the abstract is included herewith on a clean sheet. Even in light of the amendments no new matter is being added and all amendments are fully supported by the specification as filed.