摘要:
A mixture of a carrier and binder component and polymer powders is provided as a molding composition for sealing rotational molds or for reinforcing selected areas of rotationally molded parts. The carrier and binder component can be very low density polyethylene, petroleum jelly, hydrocarbon wax, hydrocarbon tackifier, or mixtures thereof, and the polymer powders are thermoplastics having a low melt index. The molding composition is applied to selected areas of the rotational mold, such as to the mating flanges of the mold halves to seal the parting line of the mold, or to areas within the mold where it is desired to have reinforced regions of greater wall thickness, such as ribs or bosses.
摘要:
The invention relates to a method and to a device used for vulcanizing or cross-linking under pressure and increased temperature shaped bodies that consist especially of rubber mixtures. The shaped body is first dipped into a bed of fine-grained pourable or free-flowing bulk material with the sections to be vulcanized. The bulk material is brought into evenly tight contact with the surfaces of the shaped body, and the bulk material is pressurized and brought to the elevated temperature at least in the region adjoining the section of the shaped body to be vulcanized.
摘要:
A method for repairing a locally damaged, dented surface of a wall, whereby the surface is provided with a relief, as well as a wall comprising a locally repaired surface, which has been repaired by using the method below. A mould comprising an impression of the relief of an undamaged part of the surface is made, the dented surface is filled with a filler, after which the impression on the mould is pressed into the filling material, as a result of which a relief corresponding with the original relief is formed in the filling material.
摘要:
Teilweise beschädigte Werkstücke aus Verbundwerkstoff werden dadurch repariert, das der Behandlungsbereich (12) mit energiereicher Strahlung bestrahlt wird, so daß sich der dort befindliche Matrixwerkstoff (26) zersetzt; der zersetzte Matrixwerkstoff (26) wird entfernt und neuer, den entfernten Matrixwerkstoff (26) ersetzender Matrixwerkstoff (26) wird in den Behandlungsbereich (12) eingebracht und ausgehörtet.
摘要:
Surface defects in a cured, molded thermoset fiberglass reinforced (FRP) part can be repaired by filling the defect or void with an excess of a thermosetting conductive repair material, applying pressure and heat sufficient to cure said material without substantial shrinkage of said material, removing the pressure, cooling and finishing said parts to the original surface contour. The repair material includes a polyurethane/acrylate, an epoxy/acrylate or an unsaturated polyester oligomer, three ethylenically unsaturated components copolymerizable with the oligomer, one of which is an acrylate and another of which has a -CO- group and a -NH z , -NH- and/or -OH group, release agents, an initiator, an accelerator, a low profile additive and filler materials, one of which is conductive.
摘要:
A method for repairing the surface of rotor blades or aircraft wings, comprising (c) a composite substrate (1); and (d) a protection layer (2) having at least one area of at least partial damage, the method comprising: (vii) removing at least part of the damaged part of the protection tape (2); (viii) optionally, reconstructing the surface of damaged composite substrate (1); (ix) optionally, applying primer (6) solution to the surface of the composite substrate; (x) optionally, applying a polymer solution, preferably in at least one organic solvent; (xi) applying heat so as to heat the surface of the composite substrate; (xii) applying a polymer filament (7) onto the surface of the composite substrate so that the polymer filament melts and covers the damaged area.
摘要:
A tire sealant composition is provided for sealing punctures in pneumatic tires, particularly in the extreme outer shoulder edge and sidewall, comprising a liquid carrier, latex in an amount between about 0.5 to about 6.0% by weight of the composition, a polysaccharide suspending agent and a particulate material with a particle size of less than 300 μm. The composition allows for passage through the tire valve without the need for removal of the valve core.
摘要:
A valve core is removed from a tire valve 3 of a wheel 2 with a tire 1 where puncture repair liquid 4 has been injected. Pressurized air filled in the tire 1 is discharged via the tire valve 3. A tube 10 is inserted through the tire valve 3 to bring the tube 10 to a liquid surface of the puncture repair liquid 4 while the pressurized air in the tire 1 is being discharged. The puncture repair liquid 4 in the tire 1 is recovered via the tube 10 using a residual pressure in the tire 1. In this manner, the puncture repair liquid can efficiently be recovered without cutting off the tire valve.
摘要:
A curing lamp apparatus mounts to a work surface with a suction cup. A base is mounted to the suction cup. A flexible neck extends from the base to the lamp head. The lamp head includes a lamp element with first and second UV light sources which emit UV light at different wavelengths. A control circuit is located in the base. A heat sink is provided on the lamp head including a conductive plate and projecting pins. A protective housing encloses the plate and pins. A timing circuit controls the light source for automatic shut off. External or internal power is provided for the control circuit.