摘要:
Le procédé consiste à soumettre à une agitation forcée les gaz injectés durant le cycle de moulage (gaz de soufflage, de réfrigération et/ou de traitement). Le dispositif fait appel à une tuyère de soufflage 1 équipée d'un ventilateur 5 à son extrémité. Le procédé et le dispositif permettent notamment la production de réservoirs à carburant en polyétylène présentant une imperméabilité améliorée.
摘要:
There is disclosed apparatus for rotationally casting a plastic liner (80) for a pressure vessel having a metal access fitting (54) molded therein. The apparatus includes a rotational casting arm (l0) having a mold supporting surface (38, 42) and adapted to be rotated about orthogonal axes (X, Y). A hollow mold (46) having a mold cavity surface (73) conforming to the outside surface of the liner to be molded is removably attached to the mold supporting suface together with a metal access fitting. The metal access fitting has a longitudinal axis aligned with one of the orthogonal axes and has at least a first surface portion (58) extending into the mold cavity. The first surface portion and the surface of the mold cavity are coated with plastic upon mold rotation to form the plastic liner.
摘要:
Provided is a waterproof sheet such that an adhesive layer is formed on a substrate rubber layer and characterized by the substrate rubber layer comprising a silicone rubber having a JIS-A hardness of 15-90, a tensile strength of at least 3 MPa, an elongation of 100-800%, and a crescent tear strength of at least 3 kN/m. The waterproof sheet can be used without a long-term decrease in material properties, and is waterproof in the long-term. In particular, the present invention can be a waterproof sheet able to withstand long-term use by means of stipulating the material properties of the substrate rubber. By means of a method for applying waterproofing to an outdoor tank, it is possible to reliably waterproof the bottom side of the outdoor tank by means of a simple application method.
摘要:
An article manufactured in a mould and which comprises a structural composite of plastics layers, the article having a wall defining an internal space for holding contents therein; wherein, the wall is formed from at least two layers of plastics materials; wherein a first of said layers comprises a thermoplastics material and at least a second layer comprises a thermosetting resin and a fibrous layer.
摘要:
A method of molding a large returnable container (40) includes a heat treatment step that includes subjecting a thick preform (10) formed of a polyester resin, or a primary blow-molded article (20) obtained by subjecting the preform to primary blow molding, to intermediate blow molding with heating to obtain an intermediate molded article (30) from which a strain that has occurred during blow molding has been removed, and a final blow molding step that includes subjecting the intermediate molded article that has shrunk to final blow molding with heating to obtain a large returnable container. The heat treatment step includes disposing the preform or the primary blow-molded article in a heat treatment mold (204), and pressurizing the preform or the primary blow-molded article by introducing high-pressure air into the preform or the primary blow-molded article so that a shoulder (22) and a body (24) obtained by blow molding close contact to a cavity surface (204A) of the heat treatment mold, and are subjected to a heat treatment, the shoulder (22) being heated at a low temperature as compared with the body (24).
摘要:
A method of manufacturing a custom sized plastic tote lighter in weight than heretofore known custom sized plastic totes is provided. The method comprises separating first and second injection molded totes into upper and lower portions by cutting the first and second injection molded totes. A sleeve or middle portion of plastic material is secured to the upper and lower portions of the first and second injection molded totes to create a custom sized plastic tote of a desired height. The sleeve may be made from different materials and may be made of multiple pieces.
摘要:
The invention relates to a thermal energy accumulator (10, 50, 70, 80, 90) that comprises a large-volume storage tank (12) for storing a storage medium (18) and that is arranged in the ground during use, wherein the storage tank (12) comprises an inner tank (14) and an outer tank (16). The inner tank (14) is made of a temperature-resistant thermoplastic plastic, and the outer tank (16) is made of a pressure-resistant thermoplastic plastic. A thermally insulating material is arranged in an intermediate space (20) between the inner tank (14) and the outer tank (16).