Process and system for fabricating a reinforcing preform
First Claim
1. A process for fabricating a multidirectional fibrous reinforcement for use in producing a part made of a composite material, said process comprising the steps of:
- providing a deposition finger for use in a deposition step to deposit at least one reinforcing thread in at least two successive layers on a support surface wherein said deposition finger comprises a presser head that is shaped to exert pressure on said reinforcing thread, said deposition finger extending from a deposition head and being movable relative to said deposition head;
providing a binder in association with said reinforcing thread so as to adhere said reinforcing thread to said support surface wherein said binder also provides a bond between said successive layers and wherein said binder is deposited on said support surface ahead of the reinforcing thread while the reinforcing thread is being deposited; and
using said deposition finger to press said reinforcing thread against the support surface during said depositing step in a manner that exerts a pressure substantially perpendicular to said support surface at the point where the thread is deposited.
1 Assignment
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Accused Products
Abstract
Process and system for fabricating a multidirectional fibrous reinforcement designed to be a porous preform for producing a part made of a composite material. Reinforcing thread is deposited in successive layers on a support surface. A binder is provided in association with the reinforcing thread so as to adhere the reinforcing thread to the support surface and the successive layers of thread. The reinforcing thread is pressed against the support surface in a manner that exerts a pressure substantially perpendicular to the support surface at the point where the thread is deposited. The binder may be pre-applied to the support surface or it can be applied simultaneously with the reinforcement thread.
30 Citations
19 Claims
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1. A process for fabricating a multidirectional fibrous reinforcement for use in producing a part made of a composite material, said process comprising the steps of:
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providing a deposition finger for use in a deposition step to deposit at least one reinforcing thread in at least two successive layers on a support surface wherein said deposition finger comprises a presser head that is shaped to exert pressure on said reinforcing thread, said deposition finger extending from a deposition head and being movable relative to said deposition head; providing a binder in association with said reinforcing thread so as to adhere said reinforcing thread to said support surface wherein said binder also provides a bond between said successive layers and wherein said binder is deposited on said support surface ahead of the reinforcing thread while the reinforcing thread is being deposited; and using said deposition finger to press said reinforcing thread against the support surface during said depositing step in a manner that exerts a pressure substantially perpendicular to said support surface at the point where the thread is deposited. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A process for fabricating a multidirectional fibrous reinforcement for use in producing a part made of a composite material, said process comprising the steps of:
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providing a deposition finger for use in a deposition step to deposit at least one reinforcing thread in at least two successive layers on a support surface wherein said deposition finger comprises a presser head that is shaped to exert pressure on said reinforcing thread, said deposition finger extending from a deposition head and being movable relative to said deposition head; providing a binder in association with said reinforcing thread so as to adhere said reinforcing thread to said support surface wherein said binder also provides a bond between said successive layers, said binder comprising a thermoplastic powder and wherein the area where the reinforcing thread is to be deposited is heated and wherein said thermoplastic powder is co-deposited onto said support surface with said reinforcing thread. - View Dependent Claims (19)
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Specification