Abstract: A recess of a thermoplastic resin container is formed by urging a part of a thermoplastic resin sheet into a cavity of a mold after heating the part of the thermoplastic resin sheet, so that a bottom portion and side walls of the recess are formed, wherein a bottom of the cavity has a convex shape area protruding in a depth direction away from the base portion formed on another part of the thermoplastic resin on the mold.

Abstract: A take-off apparatus for plastic blown sheet that is collapsed has a deflecting roller rotatably mounted for transporting the blown sheet and an air turning bar for receiving the blown sheet from the deflecting bar along a transport plane defined therebetween. The blown sheet passes around a peripheral portion of the air turning bar thereby defining a support arc region of the at least one air turning bar about which the blown sheet is supported. The air turning bar has air outlet openings disposed in the support arc region through which compressed air is ejected to support the blown sheet. The air turning bar has an arc-shaped axis defining a plane of curvature which is oriented such that the peripheral portion presents a concave surface in which the air outlet openings are disposed and which opposes the blown sheet.

Abstract: An apparatus for use in installing a liner in a conduit as part of a repair procedure, including a sealing inlet port for passage of the tubular liner into an enclosed zone where an increased pressure is maintained to move the tubular liner into the conduit and to evert it as it moves along the conduit. A clamp holds one end of the liner to the outlet side of an everter box. The sealing inlet port includes a pair of lips to press against the opposite sides of a flattened liner. Support members may be used to keep the lips from being forced back out toward the outside of the pressurized everter box, and to control friction between the lips and the liner.

Abstract: An apparatus for injection molding or forming of work pieces, including closed profile work pieces, is provided that is less expensive and requires less space than known press apparatus. The apparatus locks a molding tool assembled from two or more tool pieces to define the shape of a molded or formed product using a frame, and one or more presses. The frame defines an interior space extending from a first end of the frame to an opposed second end of the frame for receiving a molding tool. The presses are placed within the frame and act in concert with the frame to apply pressure to a molding tool. The interior space is large enough to receive an assembled molding tool into the interior space of the frame, while not permitting removal of the tool pieces from the product within the interior space.

Abstract: To make holes in ceramic green sheets that are needed to create feedthroughs, it is proposed to make the holes by using a gas that is under a higher pressure than atmospheric pressure and that is expelled in a pulsed manner from a pressure vessel and thereby acts on a principal surface of a ceramic green sheet, at at least one location at which a hole is to be made, in such a way that material is shot out of the ceramic green sheet at that location. This eliminates the disadvantages associated with the use of punches to punch holes.

Abstract: A new plastic tandem extrusion sizer mold and its manufacture method. The mold includes an inlet plate, middle plates and an outlet plate which are connected with each other in series by columniform pin, and then side baffles are added to mount on a base with the aid of bolts. In the manufacture method, a rectangular inlet plate, middle plates and outlet plate, which constitute a cavity of different shape, are placed upright and connected together in sequence and in series. Compared with the conventional sizer mold, the present sizer mold gets over the limitations of cavity parting, machining deep holes, cutting gas slots, trivial design and complex manufacture process, and has a shortened design period and simplified technological process, and can be manufactured rapidly.

Abstract: A porous structure is provided between a forming member and an underlying support structure so as to facilitate the drainage of liquid through the porous member when a web is supported on the porous member and columnar streams of liquid are directed at the web to form apertures in the web. The porous structure can include a plurality of spaced-apart, wire-like elements, a metal screen, thermoplastic netting, mesh, webbing, and the like. An improved apertured web made with the improved process employing such a porous structure has little or no lining or marking and has relatively few, if any, poorly formed apertures.

Abstract: An apparatus for calibrating hollow chamber sheet extruded lines out of thermoplastic resin includes a vacuum housing and a planar intake area at a first end of the vacuum housing. The planar intake area is configured to receive the extruded line. Support rollers within the vacuum housing are configured to support the extruded line. The extruded line exits the vacuum housing through a planar outlet area located at a second end of the vacuum housing opposite the first end.

Abstract: A lamination process for orienting and conforming a film or sheet material to a substrate surface having a surface feature such that the film or sheet material reflects the surface feature includes interposing an adhesive between the film or sheet material and the substrate surface and opposing the film or sheet material and the substrate surface; providing at least two manifolds, where each manifold provides a plurality of flow streams of a pressurized liquid, each flow stream being oriented to effectuate a clear but minimally overlapped resulting flow stream from each manifold; and directing the resulting flow streams onto the film or sheet material to coincide at a contact nip line with at a force effective to conform the film or sheet material to the surface feature of the substrate surface. The resulting flow streams are maintained for sufficient time to adhere the film or sheet material to the substrate.

Abstract: A continuous process and apparatus for producing oriented plastic tube comprising the steps of extrusion, temperature conditioning, diametrical expansion and cooling, characterized by the step of inducing axial draw of the tube between first and second haul-off means located upstream of the expansion step.

Abstract: A device for improving the possibilities of process control in blown film manufacture is described. In blown film manufacture, the plastic material is extruded in the form of a tube from a slot die and is pulled off while maintaining an internal pressure in the tube as it cools during chemical formation of the film material. According to the invention, the film tube is flushed on all sides in this cooling area with an air stream that has been conditioned in terms of temperature and air purity, and this flushing air stream, in turn, is shielded against outside influence by a partition surrounding the area. Preferably, the flushing air stream is divided into a number of partial air streams.

Abstract: Provided is a resin guiding device for an inflation molding apparatus, which guides a molten resin extruded and blown into a tubular resin from an inflation molding die, to a pair of take-up rolls, wherein said resin guiding device comprises a pair of guiding members placed between said inflation molding die and said pair of take-up rolls, and said guiding members respectively have curved contact faces which are in contact with the tubular resin where said curved contact faces are mutually outward curved, and each of said curved contact faces has a shape corresponding to a rein shape so as to fold the tubular resin into a flat shape.

Abstract: A sheet of thermoformable plastic material is positioned by air pressure adjacent a planar surface of a heating plate to heat and at least soften the sheet. The softened sheet is draped over a mold by the force of air pressure to form a molded part upon cooling. Registration pins engaging the sheet maintain the sheet in registration with the mold to insure correct positioning of any indicia on the sheet with corresponding elements of the mold. A plurality of sheets may be fused to one another during heating of the sheets.

Abstract: Apparatus for producing plastic film by extrusion includes a plastic extrusion machine having an extrusion screw, a motor for turning the screw, a die connected to the screw barrel outlet, a manifold having an opening receiving the die, a blower delivering cooling air to the manifold, and an infared emitter and detector for monitoring phase transition of the molten plastic material into solidified plastic film in adjusting operation of the apparatus to maintain plastic material phase transition occurrence in a preselected position downstream of the die by either adjusting speed of the blower or adjusting speed of the motor or both.

Abstract: A pressure containment device enables the installation of an everting liner without requiring a shipping container that can be pressurized. A pressure housing provides an inlet for receiving the liner and an outlet for installing the liner into the borehole. First and second movable belts have first and second sealing surfaces, respectively, for receiving the liner at the inlet of the pressure housing, and first and second interior surfaces for urging the first and second sealing surfaces against the liner when the pressure housing is pressurized. First rollers support the first and second movable belts within the pressure housing.

Abstract: Take-off equipment for tubular sheets are provided for plastic film produced by an extruder with a stationary blowing head. Collapsing boards collapse the tubular sheet with expanded circular cross section, and stationary conveying equipment transports the collapsed tubular sheet to stationary wind-up equipment. A reversing system with at least one deflecting roller and at least one turning bar is pivotably supported between the collapsing boards and the stationary conveying equipment. The reversing system includes at least two turntables which are at a distance from one another vertically corresponding to the at least one deflecting roller and the at least one turning bar. The turntables lie with their centers in a central vertical axis of the equipment and can be driven in a reversing manner each over a planet wheel to different turning angles. The planet wheels are constructed in each case as open planetary gears with the associated turntable having a sun wheel.

Abstract: According to the invention thin sheets of foil are stiffened in a particular way by means of vault-structuring. The vault-structuring occurs either by self-organizing or following a self-organized design with a spade-shaped or drop-shaped pattern.

Abstract: An apparatus and method for forming a sheet of material into an article, such as a flower pot cover, is provided. The apparatus includes a female die and a male die. A sheet of material is positioned between the male die and the female die. The male and female dies are shaped such that at least a portion of the male die is receivable in the opening of the female die to form the article. The apparatus further includes means for supplying a stream of air between the female die and the formed article to release the formed article from the female die and means for holding the formed article against the male die as the male die and the female die are positioned from a forming position to a discharge position whereby the formed article is removed from the female die.

Abstract: A method for blow down hydroforming sheet material includes hydraulically inflating a seal intermediate a pair of wall members and disposed between a platen and a table in circumscribing relationship with a cavity formed in the platen to seal the cavity and injecting gas into the cavity to urge conformance of the sheet material with a mold placed upon the table.

Abstract: The inventive method serves for producing open containers from a flat sheeting (4) consisting of a foam material or containing at least one layer of such a material, by drawing the sheeting with the help of a female (2) and a male tool (1) and by expanding the foam material with the help of a pressure reduction. The action sequence of one cycle of the inventive method is e.g.

Abstract: An external stabilizer employed in a plastic film blowing apparatus stacks of swing arm members that create an iris aperture for the extruded film bubble. A tubular die, fed with a supply of molten thermoplastic polymer, extrudes a tube of the molten polymer and injects air into the extruded tube to inflate the tube into a bubble. The wall of the tube expands into a film of a desired thickness; and the tube is drawn vertically upward and collapsed and flattened. The external stabilizer has a frame surrounding the extruded tube above the die. A plurality of swing arms arranged on said frame define the iris aperture. Each of the swing arms is an elongated extrusion of a light-weight material having one end mounted pivotally on the frame and a free end. The swing arm has a mushroom-shaped profile that is rounded on a side that faces the extruded tube. Wear resistant material is disposed on the front surface.