1491 results about "Pultrusion" patented technology

A blend of a macrocyclic polyester oligomer and a polymerization catalyst as a one component ready-to-use material with a long shelf life enables production of parts from macrocyclic polyester oligomers without the modification of existing equipment, thereby reducing time and cost of manufacture while expanding the application of macrocyclic polyester oligomers. In this blend material, the macrocyclic polyester oligomer remains intact in solid state at ambient conditions. Upon melting, the blend material initially forms low viscosity fluid, and then rapidly polymerizes to form high molecular weight polyesters which subsequently solidify to form crystalline polymers. In the case of certain macrocyclic polyester oligomers, for example, poly(1,4-butylene terephthalate), demolding can take place at the polymerization temperature, e.g., at about 180° C. to 200° C., because the resulting polyester polymer solidifies fairly rapidly at that temperature without cooling. In one aspect, the invention generally features a blend material that includes a macrocyclic polyester oligomer, a polymerization catalyst, and optionally, a filler. In another aspect, the invention generally features a process for preparing a blend material. In yet another aspect, the invention features processes such as rotational molding, resin film infusion, pultrusion, resin transfer molding, filament winding, making and using powder-coated or hot melt prepreg, compression molding, and roll wrapping, which use the blend material.

The invention relates to reinforced composite vehicle load floors of the sandwich-type having a cellular core. In a method for making a load floor of the invention, a stack is formed that is made up of: a load-bearing upper skin made of a reinforced thermoplastics material; an upper skeletal frame structure of reinforcing slats each of which is made of a reinforced thermoplastic composite or pultrusion; a cellular core made of a thermoplastic material; a lower skeletal frame structure of reinforcing slats each of which is also made of a reinforced thermoplastic composite or pultrusion; and a bottom skin made of a reinforced thermoplastic material. Each of the frame structures of reinforcing slats has a surface area that is smaller than the surface area of each of the skins. The frame structures of reinforcing slats are positioned symmetrically about a plane formed by the cellular core against the skins.

This invention relates to an aluminum conductor composite core reinforced cable and method of manufacture. The composite core comprises a plurality of longitudinally extending fibers embedded in a resin matrix. The composite core comprises the following characteristics: tensile strength ranging from about 250 to about 350 Ksi; a tensile modulus of elasticity ranging from about 12 to about 16 Msi; and a coefficient of thermal expansion less than or equal to about 6×10⁻⁶ cm/cm·° C. The composite core is further manufactured according to a two die pultrusion system, the system comprising tooling designed in accordance with the processing speed, selection of composite core fibers and resin and desired physical characteristics of the end composite core.

A thermoplastic pultrusion die system for pultruding a thermoplastic composite includes a first pultrusion die member with a curved, concave top surface; a second pultrusion die member with a curved, convex bottom surface; a curved die cavity gap formed between the a curved, concave top surface of the first pultrusion die member and the curved, convex bottom surface of the second pultrusion die member; a die cavity gap adjustment mechanism that imparts movement to at least one of the first pultrusion die member and the second pultrusion die member to vary the die cavity gap from closed to a specified location to open at a specified location; a pultrusion gripper mechanism having one or more grippers in series, and a computer numerical control (CNC) computer system controlling the die cavity gap adjustment mechanism.

This invention relates to an aluminum conductor composite core reinforced cable (ACCC) and method of manufacture. An ACCC cable has a composite core surrounded by at least one layer of aluminum conductor. The composite core comprises a plurality of fibers from at least one fiber type in one or more matrix materials. The composite core can have a maximum operating temperature capability above 100° C. or within the range of about -45° C. to about 230° C., at least 50% fiber to resin volume fraction, a tensile strength in the range of about 160 Ksi to about 370 Ksi, a modulus of elasticity in the range of about 7 Msi to about 37 Msi and a coefficient of thermal expansion in the range of about -0.7x10<-6 >m/m/° C. to about 6x10<-6 >m/m° C. According to the invention, a B-stage forming process may be used to form the composite core at improved speeds over pultrusion processes wherein the speeds ranges from about 9 ft/min to about 60 ft/min.

A method of preparing a reinforcing structure for use in manufacture a pultruded part where the reinforcing structure is pulled through a pultrusion die in a continuous longitudinal pull direction. The method includes arranging a plurality of first reinforcing fibers in a transverse direction and attaching a permeable transport web of staple fibers to the first reinforcing fibers such that the portion of the first reinforcing fibers oriented in the direction transverse comprises at least 40% of a volume of materials comprising the reinforcing structure.

A system and method are disclosed for producing a continuous filament reinforced thermoplastic profile having consistent cross section. A continuous reinforcing filament is pre-wetted with a first thermoplastic resin and introduced into a die, where it is contacted with a second thermoplastic resin extruded from an extruder at melt state. The temperature of the die is carefully controlled so that the pre-wetted filament and first resin do not cure or solidify until after they have contacted and mixed with the second thermoplastic resin. The mixture temperature is then controlled to make a substantially solidified profile pre-shape. A capping layer comprising a third thermoplastic resin is then co-extruded onto the outer surface of the pre-shape. A multistage die for bringing together the filament and thermoplastic resins and for maintaining appropriate temperatures at each stage of the profile-forming process is also disclosed.

The invention relates to a high-transverse-strength pultrusion structural sheet material and a manufacturing method thereof. The manufacturing method comprises that: alkali-free glass fiber roving, knitting felt and composite felt are drawn out from a creel and a felt shaft, and successively pass a yarn-guiding rack, a gum dipping tank, a pre-forming die apparatus; and glass fiber yarn and glass fiber felt subjected to infiltration and pre-forming enter a structural sheet material pultrusion die heated to a preset temperature, and sheet materials subjected to solidification forming are subjected to traction by a traction mechanism, fixed-length cutting and the like for being processed into a structural sheet material product with relatively large size and with a same shape as the die shape. The product is relatively high in transverse strength, light and high in strength, and can be subjected to secondary processing such as cutting, boring and the like. Additionally, concave-convex bayonets are arranged at the two sides of the sheet material, and the sheet material is widely applicable to buildings such as large-area building templates, wall plates, roof boards, furniture plates, decorative plates and the like, and also is applicable to other industries such as energy field and transportation field.

A detailed embodiment of the invention described herein includes a method and apparatus for pultrusion of a plastic member having a non-wood (e.g., bamboo) reinforced core. The apparatus includes an input and series of die assemblies for taking bamboo tape and embedding it in an appropriately shaped composite member. The die assembly may include a finger die, an encapsulation die, a forming die, and a chilling die. A pultrusion unit maintains production at an efficient and desired rate by use of pressure sensitive clamps to pull the product forward through the prior die units. A colorizer unit and embossing unit allow particular appearances to be produced in the end product. Alternative embodiments are also shown including the processing of bamboo into tape and ribbon forms usable by a pultrusion machine.

The invention relates to a fiber reinforced and modified method of a polyurethane foam plastic. The formula of raw materials added into raw materials of the polyurethane foam plastic is: 80-90 portions of polyether polyol 1; 10-20 portions of polyether polyol 2; 0.01-0.03 portions of catalyst; 0.5-2 portions of hard foam silicon oil; 0.2-0.5 portions of foaming agent; 5-20 portions of flame retardant; 0.1-0.2 portions of antioxidant; 115-150 portions of isocyanate; 230-300 portions of reinforcing materials. compression molding forming is that: each component in the formula after mixed evenly is fast sprayed on the surface of reinforcing fiber, which is dipped uniformly and then put into the die for curing molding under room temperature; pulling and extruding molding is carried out through a pulling and extruding device; each component in the formula after mixed evenly is fast sprayed on the surface of the reinforcing fiber running with certain speed, which is dipped uniformly and then put into a die cavity for foaming, curing and molding.

A method and apparatus for forming a profile that contains at least one layer of continuous fibers and at least one layer of discontinuous fibers. Said method allowing the selective control of features to achieve a profile that has increased transverse strength and flexural modulus. The layer of continuous fibers may be formed from one or more continuous fiber reinforced ribbons (“CFRT”) (12) that contain fibers embedded within a thermoplastic polymer matrix, whereby a void fraction and in turn is minimized and flexural modulus is optimized Further, the ribbon (s) are consolidated so that the continuous fibers remain fixed in alignment in a substantially longitudinal direction (e.g., the direction of pultrusion). In addition to enhancing the tensile properties of the profile, the use of such ribbons also allows an improved handability when placing them into the desired position within the pultrusion die. The discontinuous fibers are also embedded within a thermoplastic matrix, in such a way as to assist in bonding of the layers to achieve the desired strength. At least a portion of the fibers are oriented in the transverse direction to provide increased transverse strength.

Pultruded composites of longitudinally oriented reinforcing fibers in a matrix of a thermoplastic resin are shaped in-line during the pultrusion process to provide a variety of non-linear or variable cross-section articles.

The invention relates to a high temperature resistant epoxy resin composition for rapid pultrusion and a preparation method thereof. The epoxy resin composition consists of 100 parts by mass of epoxy resin, 30-50 parts by mass of amine curing agent, 0.5-5.0 parts by mass of latent curing agent, 0.5-5.0 parts by mass of small epoxy group It is composed of molecular compound and 0.5-5.0 parts by mass of inorganic filler. The mixed epoxy resin of glycidyl ether epoxy resin and glycidyl amine resin or glycidyl ester epoxy resin is used as the resin matrix of the pultruded product, so that the pultruded product has high strength and high toughness impact resistance, and has Excellent high temperature resistance. Using a latent curing agent together with a mixed amine curing agent can make the pultruded product have a lower curing temperature and be cured quickly within a certain period of time, shortening the curing time, thereby improving the pultrusion speed and production efficiency.

A rotor blade component for a wind turbine rotor blade may generally include an assembly of pre-formed pultruded products. Each pultruded product may include an interior pultruded portion formed from a first fiber-reinforced composite including a first plurality of fibers surrounded by a thermoset resin material and an exterior pultruded portion encapsulating the interior pultruded portion. The exterior pultruded portion may be formed from a second fiber-reinforced composite including a second plurality of fibers surrounded by a thermoplastic resin material.

In a pultrusion device for producing continuous length sections prepared from thermoplastic resins reinforced with long fibers, the vertical angle (.alpha.) of an upstream conical surface of a conical portion, which constitutes a shaping nozzle perforated through the downstream end wall of the device ranges from 15 to 35 degrees and the shaping nozzle has a land portion having a length of 1 to 5 mm in the downstream area subsequent to the upstream conical surface. According to this pultrusion device for producing continuous length sections prepared from thermoplastic resins reinforced with long fibers, the long fibers never undergo any breakage nor fluffing during the opening treatment and this accordingly leads to the substantial reduction of pill-formation. As a result, the opening-impregnation device of the present invention provided at least with the downstream end wall carrying the shaping nozzle (including the land portion) can stably and continuously be operated over a long period of time, without any trouble such as those encountered in the conventional devices.

Clear polyurethane fiber reinforced composites are produced by a pultrusion process with a polyurethane-forming system that includes: (a) a clear, aliphatic polyisocyanate having a viscosity at 25° C. of no more than 1000 centipoise, (b) a colorless polyol component comprising an amine-initiated polyol having a molecular weight of from about 150 to about 400 and an OH functionality greater than or equal to 3, and (c) a catalyst. These fiber-reinforced composites are characterized by both excellent weathering characteristics and excellent physical properties.

The invention relates to a reinforced fiber composite sleeper for supporting railway tracks. The reinforced fiber composite sleeper is one made from reinforced fiber materials, fiber felts or weaving cloth through resin impregnation, formed by the pultrusion of a forming die for designing the shape of the section and solidified in the forming die. The invention overcomes the defects of the known techniques, has ideal strength and elasticity and good insulating property compared with the common concrete sleeper and the anticorrosive wooden sleeper, and ensures the safe running of the trains. In addition, with the good elasticity, the reinforced fiber composite sleeper greatly enhances the whole elasticity of the track structure and reduces the influence on roadbeds from the vibration of the trains and the environmental pollution from the noise of the trains during running; with the good insulating property, the reinforced fiber composite sleeper has no influence on the track circuits so as to ensure the safe running of the trains. The invention has the advantages of simple manufacturing, easy forming and short production period, and is capable of realizing the mechanical and continuous production. Besides, the length of the reinforced fiber composite sleeper can be cut and processed according to the determined length requirements, and the waste sleepers can be treated and recycled easily.

A method for forming a pultruded part includes collating reinforcing fibers by providing a first layer of reinforcing rovings extending in the longitudinal pultrusion direction, applying onto the first layer an intermediate layer of reinforcing fibers at least some of which include at least portions thereof which extend in the transverse direction and covering the intermediate layer with a second layer of rovings extending in the longitudinal direction. Alternatively the transverse fiber layer is formed on the inside surface of a hollow part. To the collated fibers is applied a urethane resin so as to permeate through the layers and the materials are passed through a die to form a thermo-set cross-linked poly-urethane. The transverse layer or layers are relatively thin having a weight less than or equal to 0.5 ounces per square foot and more preferably as low as 0.25 ounces or 0.1 ounces.

The present invention relates to a pultrusion process for making glass fibre reinforced plastics tube and its special-purpose die equipment. Said process includes the steps of soaking yarn, felt-yarncombination, preforming, solidfying and forming and tube-discharging and coaling. Its special-purpose die equipment includes a die cavity whose internal diameter is equal to the external diameter of formed glass fibre reinforced plastic tube, the periphery of said die cavity is equipped with heating device, a die core whose external diameter is equal to the internal diameter of formed glass fibrereinforced plastic tube is cover-mounted in the interior of die cavity, the centre of said die core is hoelow, and its interior is equipped with heating device. Said invention adopts common heating method in exterior and interior of said die cavity, so that the interior and exterior of glass fibre reinforced plastic tube are solidified well, and its surface is smooth.