摘要:
This disclosure relates to a mould (10) for casting concrete or other cementitious components, the mould having a mould surface (13) and electric heating means (15) embodied in the mould adjacent the surface to heat the surface and thereby a component being cast in the mould to accelerate curing of the component, and means for applying vibration with a chamber enclosing the vibration applying device to minimize transmission of noise.
摘要:
A method of making a transportable brick panel consisting of the following steps: a) Setting out a mould (10) on which a brick panel is to be formed, the mould including a substantially flat bottom surface; b) Laying a soft deformable membrane (11) over the said surface, the membrane being such as to form a seal around the face edges of bricks placed on it to prevent fine cementitious particles in mortar placed between the bricks from contaminating the faces of the bricks and such as to inhibit movement of bricks placed on it; c) Arranging courses of brickwork (13) in the mould on the membrane; individual bricks (13) being substantially evenly spaced apart for the reception of fluid mortar in the spaces between them; d) Arranging reinforcing bars (14) to pass through aligned holes in columns of bricks so as to structurally extend through to the top and bottom course or layer of bricks; e) Pouring fluid mortar to fill spaces between individual bricks and penetrate holes in the bricks and allowing it to set; f) Lifting the brick panel so formed from the mould (10).
摘要:
In a method for manufacturing foam concrete elements, a mixture appropriate for casting is prepared, comprising substantially a granular material, particularly silicates, water, ciment and foam, the material being poured in a mold, and thereafter the blank is withdrawn from the mold when it has acquired a sufficient resistance and it is finally allowed to harden. In order to readily and rapidly manufacture constant density bricks, before filling the mold, a temperature riser and setting accelerator agent is added to the mixture, this agent heating the final mixture in the mold by an electric field at a high frequency and a homogenous temperature comprised between 40 and 80 C. The heating in the mold of the final mixture is effected so rapidly that the expansion of the mixture due to the heating is finished before the setting of the ciment. The element is withdrawn from the mold after a heating comprised between 20 to 120s.
摘要:
The present invention provides a dispersant composition for hydraulic compositions for centrifugal molding, which contains (A) a dispersant for hydraulic powders composed of an aromatic ring-containing high-molecular compound; and (B) one or more compounds selected from specific compounds represented by the general formulas (B1) to (B4).
摘要:
A die for moulding a core by a PIM process, the core (201) having at least one internal feature (8), the die comprising; a first die part (110) defining a first portion of an outer surface of the core; a second die part (111) defining a second portion of the outer surface of the core (201); and an internal feature forming element (113,114; 222) for defining the surface of an internal feature of the core; wherein the internal feature forming element incorporates a temperature control circuit (118,119,120,121).
摘要:
A method and a component piece made from materials of natural and/or mineral stone residues, binders and additives and/or vegetable residues and/or animal residues and/or industrial residues that can be used in several applications in the construction sector, such as, for example, in the manufacturing of kitchen countertops, wall coverings, thermally insulated and/or soundproof panels, etc. During the method the mold is heated which improves the quality of the final piece obtained.
摘要:
The invention relates to a method for manufacturing a composite bipolar plate from a composition comprising at least one flake graphite and at least one thermoplastic polymer. Said method comprises the following consecutive steps: (a) dry sieving of the composition by means of a sieve for which the mesh diameters are less than or equal to 1000 μm, (b) dry blending of the sieved composition, (c) deposition of the blended composition in a mould, said mould preferably being preheated, (d) moulding by thermocompression of the blended composition with induction heating of the mould, and (e) removal from the mould of the thermocompressed composition leading to the obtaining of the composite bipolar plate. The invention also relates to a composite bipolar plate manufactured by said method, the use of this composite bipolar plate and a fuel cell comprising such a composite bipolar plate.