摘要:
The invention provides a novel thermoplastic molding process useful in the manufacture of hollow, deformable thermoplastic articles such as hollow doll heads. In the process of the instant invention, a parison is formed at a first injection station and is transferred to a blow mold station. At the blow mold station, the parison is transformed into a hollow, deformable thermoplastic article through application of a vacuum and gas injection. Articles made by the process of the instant invention have a highly realistic appearance and texture.
摘要:
For simply and surely manufacturing a double wall corrugated pipe, there is provided a method for manufacturing a double wall corrugated pipe having a slot part 3 on one end, a socket part 2b on the other end, an external wall 6 of a continuous irregular shape, and an inner wall 7 of a tubular shape by subjecting a thermoplastic resin to extrusion molding, comprising at least: a first cutting step in which a double-wall continuous tubular body 1a to be extrusion molded in a state of which the socket part 2b (2a) and the slot part are being coupled together is cut off at an external wall part X corresponding to the end portion of the socket part 2b and at an external wall part Y corresponding to the end of the slot part 3; and a second cutting step in which a cutting unit is inserted to a predetermined position from a socket part 2a side opening to an internal cavity portion 9 of the double wall single tubular body 1b obtained in the first cutting step, and the inner wall 7 is cut off in a circumferential direction while a cutter Cz protruded from the cutting unit U is brought into contact with an inner wall part Z from which the socket part 2a is started.
摘要:
A blow molded article is disclosed. The blow molded article includes a body defining a cavity, and a wall integrally-formed with the body and defining at least in part, an enclosure. A method of making a blow molded article is also disclosed. The method comprises supplying a preform to a mold having a first cavity and a second cavity, the first cavity having a pin, closing the mold, supplying a fluid to the closed mold, expanding a first portion and a second portion of the preform around the pin, and contacting the first portion and the second portion to provide the enclosure.
摘要:
A process for producing a blow molded article, in which a parison is disposed between an outer face-forming mold section having an air bleeding hole and a bottom face-forming mold section and adjacent said bottom face-forming mold section. A resin film is disposed between the parison and the outer face-forming mold section. Then the outer face-forming mold section and bottom face-forming mold section are closed. Then air is blown into the parison to inflate the parison to form the end product and simultaneously to mold the resin film and the end product in an integral relationship with each other.
摘要:
A parison is blow molded to form a sealed aseptic bottle for subsequent opening and filling. The pressure of the gas in the interior of the bottle when sealed is sub-atmospheric to prevent distortion of the bottle.
摘要:
In a blow molding process in which a parison is blown with a blowing gas containing a reactive gas component capable of reacting with the inner walls of the parison, the blowing gas is removed from the resulting blown article with a purging gas and stored for reuse. The mixture of blowing and purging gases in a reserve tank or other suitable means is adjusted to a certain level of pressure and reactive gas concentration and then recycled as the blowing gas in a subsequent blow molding step. The resulting blown articles from this process have improved properties, e.g. improved impermeability against non-polar solvents when fluorine is the reactive gas.
摘要:
Machine system for continuous formation of molecularly oriented plastic bottles by blowing heat-conditioned parisons comprising a modular unit including a parison forming section for simultaneously forming a plurality, preferably four, of parisons in injection molds, each mold having a neck ring assembly; a blowing or bottle forming section for simultaneously blowing the same number of bottles in blow molds as there are parisons in the parison forming section, and an invert arm assembly having a plurality of arms constructed and arranged between said parison forming section and bottle forming section so that the extreme end of each invert arm will retain the neck ring assembly of the injection mold, and in a first position the arms and neck rings are in operable association with the parison injection molds and in a second position are in operable association with the blow molds. In the method of operation, the arms of the invert arm assembly retain the neck rings of the parison forming molds, the parisons are simultaneously molded, the invert arm and neck ring assembly inverted, i.e., rotated 180 degrees, depositing the formed parisons and neck rings in operable association with an open blow mold. After blow mold closing, the neck rings are opened and the invert arms carrying the neck rings are again inverted, i.e., rotated 180 degrees in the opposite direction, to the first invert movement, and the cycle begins again. The machine system provides for rapid manufacture of bottles, is compact, and makes efficient use of machine components.