A system is disclosed for additively manufacturing a composite structure. The system may include a support, and a print head connected to and moveable by the support. The print head may have an outlet configured to discharge a continuous reinforcement at least partially coated in a matrix. The system may also include at least one doser located inside the print head and configured to at least partially coat the continuous reinforcement with the matrix, a sensor located downstream of the at least one doser and configured to generate a signal indicative of an amount of matrix coating the continuous reinforcement, and a controller in communication with the sensor and the at least one doser. The controller may be configured to direct a feedforward command to the at least one doser to cause the at least one doser to advance matrix toward the continuous reinforcement during passage of the continuous reinforcement through the print head, and to selectively adjust the feedforward command based on the signal.

A polymeric sandwich structure having enhanced thermal conductivity includes a first layer formed from a first polymer matrix and including a first fiber reinforcing sheet embedded within the first polymer matrix, a second layer formed from a second polymer matrix and including a second fiber reinforcing sheet embedded within the second polymer matrix, and a third layer disposed between the first and second layers, the third layer formed from a third polymer matrix having graphene nanoplatelets interspersed therein. Each of the first and second fiber reinforcing sheets is made of reinforcing fibers and includes a respective set of staggered discontinuous perforations formed therein, wherein each respective set of staggered discontinuous perforations defines a respective first plurality of reinforcing fibers having a respective first length and a respective second plurality of reinforcing fibers having a respective second length longer than the respective first length.

A method for producing products made of composite material, comprising the following operating steps: placing between a first mould (12) and at least a second mould (23) at least one layer (1) of composite material fibre fabric and at least a first layer (16) of composite material fibres, wherein a layer (3) of non-polymerized, composite material resin, substantially free of hardener, is placed between the fabric layer (1) and the first mould (12); injecting resin and hardener between the first mould (12) and the second mould (23) to impregnate the layer (1) and the first fibre layer (16) with the injected resin and polymerizing the injected resin and the resin layer (3) with the injected hardener. This description also relates to a semi-finished item which can be used in this method and to a product made using this method and/or with this semi-finished item.

A method is disclosed for forming extrudate filament, which consist essentially of fiber, organic binder, and metal and/or ceramic. The extrudate filament can be spooled, or used to form preforms, and/or assemblages of preforms. In further methods, the extrudate filament and/or preforms can be used to fabricate fiber-reinforced metal-matrix or ceramic-matrix or metal and ceramic matrix composite parts, which consist essentially of fiber in a matrix of metal, or ceramic, or metal and ceramic, respectively.

Described herein is a panel construction, a process for preparing the same and a method of using the same as an automotive part.

A thermoplastic prepreg includes a mat, web, or fabric of fibers and hollow glass microspheres that are positioned atop the mat, web, or fabric of fibers or dispersed therein. The thermoplastic prepreg also includes a thermoplastic polymer that is fully impregnated through the mat, web, or fabric of fibers and the hollow glass microspheres so that the thermoplastic prepreg has a void content of less than 3% by volume of the thermoplastic prepreg. The thermoplastic material is polymerized monomers and oligomers in which greater than 90% by weight of the monomers or oligomers react to form the thermoplastic material.

A ribbon yarn having an upper side and a lower side, filaments and at least one binder material, the binder material binding the filaments to one another and the upper side and/or the lower side of the ribbon yarn having a pressure-sensitive adhesive. The filaments of the ribbon yarn can consist only of one material or of different materials and they can be arranged in one layer or in multiple layers. The pressure-sensitive adhesive can be applied on the upper side and/or lower side of the ribbon yarn or can be a constituent of the binder material.

A system is disclosed for additively manufacturing a composite structure. The system may include a support, and a print head connected to and moveable by the support. The print head may have an outlet configured to discharge a continuous reinforcement at least partially coated in a matrix, and a device located inside the print head and configured to at least partially coat the continuous reinforcement with the matrix. The system may also include a sensor configured to generate a signal indicative of an amount of the matrix, and a controller in communication with the sensor and the device. The controller may be configured to direct a command to the device to cause the device to advance matrix toward the continuous reinforcement during passage of the continuous reinforcement through the print head, and to selectively adjust the command based on the signal.

A thermoplastic prepreg includes a mat, web, or fabric of fibers and hollow glass microspheres that are positioned atop the mat, web, or fabric of fibers or dispersed therein. The thermoplastic prepreg also includes a thermoplastic polymer that is fully impregnated through the mat, web, or fabric of fibers and the hollow glass microspheres so that the thermoplastic prepreg has a void content of less than 3% by volume of the thermoplastic prepreg. The thermoplastic material is polymerized monomers and oligomers in which greater than 90% by weight of the monomers or oligomers react to form the thermoplastic material.

A method is disclosed for operating an additive manufacturing system. The method may include wetting a reinforcement with a thermoset matrix inside of a print head, discharging the wetted reinforcement from the print head, and moving the print head in multiple directions during discharging. The method may also include exposing the thermoset matrix wetting the reinforcement to a cure energy to initiate a chemical reaction, and directing a medium onto the wetted reinforcement to regulate a rate of the chemical reaction.