Abstract: A process for the manufacturing of an article made of plastic material, the article comprising an expanded foam filled core with an average density in the range 50-600 kg/m3 and a solid or semi solid outer skin with an average density above 700 kg/m3. The process comprises the steps of injecting a predetermined amount of molten thermoplastic material into the cavity of a closed mould, the thermoplastic material containing an expanding agent followed by allowing the thermoplastic material to solidify somewhat closest to the surface of the whereby a skin is formed. A first portion of the mould is then retracted while a second portion of the mould is retained in a closed position, whereby a volumetric increase of the mould cavity is achieved. The pressure in the mould hereby decreased allowing the expanding agent to expand the thermoplastic material. The molten thermoplastic material is then allowed to cool and solidify to a degree where the mould may be opened and the article is removed from the mould.

Abstract: A process for the manufacturing of non-reinforced load carriers (1) of thermoplastic material. Sheet-shaped work pieces (2) and extended bar sections (3) are manufactured by means of an extruder. The work pieces (2) and bar sections (3) are allowed to cool and post-shrink after the manufacturing. An upper and a lower deck member (11 and 12 respectively) are molded in a number of molds comprising mold halves. A first mold contains shaping cavities being a negative representation of the upper deck member (11). A second mold gives shape to a lower deck member (12). The work pieces (2) are molded against each one cavity by means of vacuum and are pressed together while still hot whereby a hollow unit is formed. Skids (3′) are molded in a similar way. The parts are allowed to cool and post-shrink whereupon they are joined with each other via a number of joining areas (10).

Abstract: A process for the manufacturing of thermoplastic products with a high creep strain resistance. The products are free from reinforcing additives. The process includes at least vacuum forming and/or blow moulding of a thermoplastic material such as a polyolefine. A number of product parts are manufactured from a number of preferably tube- or sheet-shaped work pieces. The work pieces are heated so that the thermoplastic material softens whereby they are given the desired shape by means of a mould and the influence of vacuum and/or pressure. The product parts produced are allowed to cool and post-shrink and are hereafter joined to a unit.

Abstract: Article made of thermoplastic material, which article is rigid and at least partly heat insulating. The article includes a laminate in at least parts of the article. The laminate includes a first and a second layer of solid thermoplastic material (A) and an intermediate layer of expanded thermoplastic material (B) with an average density of 50-800 kg/m3. The thermoplastic materials (A) and (B) are the same or compatible materials. The article is manufactured according to a process comprising the steps a) forming of a solid outer layer, b) manufacturing of an intermediate expanded layer and c) the appendage of functional parts such as reinforcing profiles, guiding profiles, stacking profiles, hinge parts, pockets, label holders, profiles or holes for automatic handling, locking devices or the like.