摘要:
A method of manufacturing a fiber reinforced composite material lid for an utility vault including mixing an unsaturated polyester thermosetting matrix in to a resin paste, compounding the resin paste into a fiber reinforced composite material, maturing the compounded fiber reinforced composite material, cutting the matured compound into a charge pattern, molding the charge pattern in a mold cavity of a heated mold under low pressure to form the lid and cooling and machining the lid. The mold includes a cavity die and a core die having a shear angle for interfacing the core die within the cavity die and a steam pot for heating the cavity die and the core die, wherein the lid is molded between the cavity die and the core die and removed from the mold by a lid ejection mechanism.
摘要:
The present invention concerns a method for processing and detoxification of a material, especially a thermoplastic material, and for removal of contaminants or impurities from this material, wherein the material is heated under vacuum in at least one receiving tank, mixed and possibly comminuted, and wherein a rinsing medium is introduced into the receiving tank beneath the material level, conducted through at least a partial region of the material, and the rinsing medium enriched or saturated with contaminants is brought out from the receiving tank once more. According to the invention, the quantity of rinsing medium introduced into the receiving tank is less than 0.1 liter per hour per kilogram of material or material throughput per hour, while at the same time the vacuum in the receiving tank is kept constantly below 100 mbar.
摘要:
A method for manufacturing a plastic fuel tank including: a) inserting a plastic parison including two distinct parts into an open two-cavity mold; b) inserting a core, bearing at least part of a reinforcing element configured to create a link between the two parison parts, inside the parison; c) pressing the parison firmly against the mold cavities, for example by blowing through the core and/or creating suction behind the cavities; d) fixing the part of the reinforcing element to at least one of the parison parts using the core; e) withdrawing the core; f) closing the mold, bringing its two cavities together to grip the two parison parts around their periphery to weld them together; g) injecting a pressurized fluid into the mold and/or creating a vacuum behind the mold cavities to press the parison firmly against the mold cavities; and h) opening the mold and extracting the tank.
摘要:
A resin joined body includes a first portion formed of a thermoplastic resin containing fibers, and a second portion formed of a thermosetting resin cured material containing fibers. The thermosetting resin cured material has a melting temperature lower than a melting temperature of the thermoplastic resin. The first portion is joined to the second portion by welding the thermoplastic resin to the thermosetting resin cured material.
摘要:
An insulated drinking vessel, e.g., a tumbler, and method of making the same is disclosed. The vessel basically comprises a pre-molded inner vessel formed of a plastic material having a sidewall is disposed within a pre-molded outer vessel formed of a plastic material having a sidewall to form a subassembly having an insulating air space between the sidewalls. A ring of plastic material is molded in-situ on top portions of the inner and outer vessels of the subassembly to cause portions of the plastic material of the inner and outer vessels to melt and intermingle with the plastic material of the ring to form a non-superficial homogenous joint. The ring forms the rim or lip of the insulated drinking vessel.
摘要:
An apparatus for producing an improved friction-fused welded joint is provided for use with overlapping thermoplastic strap portions. In an embodiment, the gripper is caused to swing back and force with a sufficiently large stroke and with a sufficiently fast stroke to cause sufficient reciprocation to rapidly heat the thermoplastic so that the two straps are welded together while reducing the depth of the area that is melted compared to traditional methods. Also, in an embodiment, a method is provided for stopping the relative motion of the two portions of straps with the portions of the plastic straps oriented in the same aligned relative positions at the end of the welding operation as at the beginning is disclosed.
摘要:
The technical problem to be solved is to change the thickness of the colored resin layer of the preform gradually in the upward or downward direction, by utilizing a tendency of gradual decrease in the thickness of the colored resin layer caused by the flow of the main resin inside the preform mold when the main resin and the colored resin are injected into the mold. This involves adjusting the injection pattern including the time of starting and ending the supply of the main resin and the colored resin, and pressure or velocity profiles, reducing the thickness of the colored resin layer gradually upstream or downstream, injection-molding the preform in which a color-gradated portion associated with the thickness of the colored resin layer has been formed, and biaxially drawing and blow molding this preform into a bottle having a color-gradated portion.
摘要:
A column or other elongate molded part is molded using an elongate tubular mold having a closed end, an open end and a flexible sidewall. After the column or other molded part is formed, it is extracted from the mold by pulling the column or other molded part axially through the open end of the mold. The inner surface of the mold may comprise a recessed or protruding form to mold a protruding or sunken relief on or in an exterior surface of the molded part. The column may be extracted using an expandable plug that is inserted into the interior of the column or other molded part through the open end of the mold. The expandable plug is expanded to engage and seal against an inner surface of the elongate molded part. A pressurized gas is introduced into the interior of the elongate molded part through the plug to expand the mold before pulling the column through the open end of the mold.
摘要:
The present invention is a method for strengthening a vertical column, such as piles under piers and docks and for columns in bridges and buildings. A coiled FRP laminate is provided and wrapped in a helical fashion around the column, with the laminate overlapping itself. An epoxy resin coating is applied between the overlapping portions. The epoxy resin will then cure to form a substantially water tight shell. A plurality of spacers may be fixed to the column and adapted to hold the laminate a set distance away from the column. A plurality of sealing means is provided to seal the space between the shell and the column. A filler material may be pressurized to fill the space, penetrate cracks in the column, and displace water. Also, a plurality of rigid strengthening rods may be added between the column and the shell to further strengthen the column.
摘要:
An apparatus and a method for a continuous manufacture of an expanded composite honeycomb block are provided. Resin impregnated fibers are deposited on a conformable thin membrane that moves over a heated bed with a corrugated surface. A vacuum is applied between the conformable thin membrane and the heated bed to conform the resin impregnated fibers to the shape of the corrugated surface of the heated bed. A stacker is lowered to contact the corrugated resin impregnated fibers on top nodes of the corrugated surface of the heated bed. The corrugated resin impregnated fibers are heat cured. The stacker is raised to lift the heat cured corrugated resin impregnated fibers after the corrugated resin impregnated fibers release from the conformable thin membrane. The above steps are repeated until the stacker stacks layers of the corrugated resin impregnated fibers to a desired thickness to manufacture the expanded composite honeycomb block.