A method and apparatus for the formation of double-walled containers with the structure of two integrally connected and adjacent containers extending in the same direction with an air gap between them, stretch-blow moulded as single bodies out of thermoplastic material, and suitable for mass-production. A thermoplastic tubular blank is formed and then heat-conditioned. The heat-conditioned tubular blank is then mechanically stretched longitudinally and blow-formed outwards by gas pressure to conformingly and stretchingly assume the tubular blank to the shape of a first dual-container shaped mould cavity set in order to form a stretch-blow moulded first container integrally connected to a second container, with both containers extending in opposite directions. Next, additional heat-conditioning is applied to further heat-condition as necessary the stretch-blow moulded second container and if deemed an advantage, at least part of the first container. Then at least one profiled inversion piston and a second dual-container shaped mould cavity set are provided along with one or more wall stability devices applied to at least part of the wall surface(s) of either or both of the two integrally connected stretch-blow moulded containers, such that the second container side wall(s) may be inverted at least partially inside-out, while at the same time the second container bottom wall at least substantially does not invert, in order for the second container to become a substantially mirror-image inverted second container extending in the same direction as the first container, and an air gap is formed between the first container and second container.

A multilayer strip intended to be wound on a form to manufacture a part in composite material, includes superposed fibrous layers, at least one of these layers being pre-impregnated, the superposed fibrous layers including a first layer including a first material on a first side of the width of the strip and a second material, differing from the first material, on a second side of the width of the strip opposite the first side, and a second layer superposed on the first layer and including the first material on the first side and the second material on the second side, with overlapping of a material of the second layer over a different material of the first layer.

A method and assembly for forming a multi-shot panel for a vehicle including the steps of providing a mold and forming therein a main body of the panel from a first rigid material, the step of forming the main body further including forming a multi-sided recess. The rigid material is transferred to a second reconfiguration of the mold for forming thereupon at least one second softer material. The panel is then transferred to a third reconfiguration of the mold for forming the heat deflecting shield. Alternative, a two shot injection molded panel can be removed from the mold and a previously formed heat deflecting shield can be attached along edges of the main body defining the multi-sided recess. In either variant, locking features are designed into the interface geometry between the heat deflecting shield and rigid main body.

The invention relates to a blow molding tool for a blow molding machine for producing plastic containers in an extrusion or stretch blow-molding process. The blow molding tool comprises two blow mold halves, each of which comprises at least one molding body in which at least one mold cavity is disposed, and a baseplate that receives said molding body. An insulation block consisting of a thermally insulating material is arranged between the molding body and the baseplate and, optionally, further components of the blow mold halves.

A method of layerwise solid freeform fabrication is disclosed. The method comprises, for each of at least a few of the layers, dispensing and hardening at least a first modeling material and a second modeling material to form a core region and one or more envelope regions at least partially surrounding the core region. In some embodiments, the ratio between the elastic moduli of adjacent regions, when hardened, is from about 1 to about 20.

The invention relates to a method and a device for manufacturing a pipe shell from an insulating material by means of which the cycle times can be further reduced while the quality of the pipe shell is simultaneously improved, by at least one web (29) of the insulating material which is provided with a binding agent being wound around a core (19) by means of at least two opposing belts (12, 13) which wrap around the core (19) partially. The method steps are characterized in that the at least one wound-up web (32) of insulating material is removed in a radial direction of the core (19) which is, however, not opposite to the direction in which the at least one web (29) of insulating material was fed by the one belt (12), especially by the wound-up web (32) being discharged through the same belt (12).

A method of manufacturing a vacuum heat insulator includes preparing a hollow body that has heat resistance equal to or higher than a level to withstand a flame of 781° C. for 20 minutes and that has a hollow portion in the hollow body, introducing, into the hollow portion of the hollow body, an inorganic foaming agent that has the heat resistance and foaming the foaming agent to form a foam having open cells, or introducing an inorganic foam having the heat resistance and open cells, and then solidifying the foam, and evacuating the hollow portion after the foam is solidified or during the solidification of the foam.

A method for producing a heat-shrinkable product is provided. First, a polymer composition containing a polymer, a crosslinking agent and a micro-encapsulated foaming agent uniformly dispensed therein is melt mixed. The foaming agent has a peak activation temperature which is higher than a temperature of the melt mixing. Next, the polymer composition is injection molded into a molded product. This carried out at the peak activation temperature to activate the foaming agent. Then, the molded product is crosslinked within the mold.

The invention relates to an extrusion process for the production of expandable vinyl aromatic polymer granulate comprising mixing first and second additives with first and second polymer components, respectively, in dedicated mixers.

A mold which can improve an appearance of a molded body is provided. A mold includes a cavity, the mold being capable of subjecting a resin sheet under reduced pressure suction via a plurality of reduced pressure suction holes thereby shaping the resin sheet to follow a shape of an inner surface of the cavity; wherein: the inner surface includes a base surface and a plurality of island-like concave portions provided in the base surface; and a concave portion reduced pressure suction hole index defined by an in-concave reduced pressure suction hole ratio divided by a concave portion area ratio is 0.5 or lower.