Forming device and forming method for tubular three-dimensional braided composite product

Abstract

The invention relates to a forming device and a forming method for a tubular three-dimensional braided composite product. The forming device comprises a flexible core mold, an inward-contracting demolding device, a flexible RTM outer mold, a mold curing device and a medium circulation device, wherein the inward-contracting demolding device is arranged between the flexible RTM outer mold and the flexible core mold; the flexible curing device is arranged on the outer side of the flexible RTM outer mold; and the flexible core mold is connected with the medium circulation device. The forming device is applicable to forming of the tubular three-dimensional braided composite product; by adoption of the forming device, a curved tubular three-dimensional braided composite with various uniform interfaces and various irregular variable cross sections can be prepared; meanwhile, after preform fabric is subjected to braided molding, resin RTM impregnation and rapid curing molding can be performed continuously; and besides, the forming device has the function of quickly demolding the tubular three-dimensional braided composite product. Accordingly, the problem that a conventional metal or wood core mold is cumbersome in molding process, single in function and relatively low in production efficiency can be effectively solved.

Description

technical field

[0001] The invention relates to a matching forming device for a three-dimensional weaving machine for composite material products, in particular to a forming device and a forming method for a tubular three-dimensional weaving composite material product. Background technique

[0002] Three-dimensional braided composite material is a high-performance composite material with unique mechanical properties and uniform material characteristics. The fiber reinforced structure and its quality are the key to determine the performance of the composite material. The preformed parts of the three-dimensional braided composite material have many Outstanding features: First, the fibers in the workpiece are interwoven and the direction has the characteristics of arbitrary orientation, forming a structure similar to a homogeneous material, especially the fiber ratio in the thickness direction of the composite material is the same as that in the plane direction, effectively avoi...

Examples

Embodiment 1

[0037] The circular tubular three-dimensional braided composite product molding device of the present invention is used in conjunction with a three-dimensional braiding machine to prepare a uniform circular tubular three-dimensional braided fabric composite product. First, a certain volume of compressed air is poured into the flexible mandrel 1 to ensure that the mandrel 1 The pressure is about 3MPa. After the air pressure reaches the requirement, the inflation port of the mandrel 1 is sealed firmly, and then a retractable demoulding device 3 is installed on the outer surface of the flexible inflatable mandrel 1, and the demoulding device 3 is coated on the surface of the inflated mandrel 1, and The retractable spring belt is adjusted by the locking knob so that it is closely adhered to the surface of the flexible mandrel 1, and the flexible mandrel 1 and the retractable spring belt are integrated. After the above device is assembled, put it on the three-dimensional braiding m...

Embodiment 2

[0039] Using the square tubular three-dimensional braided composite product forming device of the present invention in conjunction with a three-dimensional braiding machine to prepare a uniform square tubular three-dimensional braided fabric composite product, first pour a certain volume of water into the flexible mandrel 1 to ensure the mandrel 1. The pressure is about 2MPa. After the water pressure meets the requirements, the water filling port of the mandrel 1 is sealed firmly, and then a retractable demoulding device 3 is installed on the outer surface of the flexible water-filled mandrel 1, and the demoulding device 3 is coated on the water-filled mandrel 1 surface, and adjust the retractable spring belt by locking the knob to make it closely adhere to the surface of the flexible mandrel 1, and form a whole with the flexible mandrel 1 and the retractable spring belt. After the above device is assembled, put it on the three-dimensional braiding machine to weave the square ...

Embodiment 3

[0041] The elliptical tubular three-dimensional braided composite product molding device of the present invention is used in conjunction with a three-dimensional braiding machine to prepare a uniform oval tubular three-dimensional braided fabric composite product. First, a certain volume of heat-conducting oil is poured into the flexible mandrel 1 to ensure that the mandrel 1 The pressure is about 2.5MPa. After the heat-conducting oil pressure reaches the requirement, seal the oil-filled port of mandrel 1 firmly, and then install a retractable demoulding device 3 on the outer surface of the flexible oil-filled mandrel 1, and the demoulding device 3 covers the oil-filled core The surface of the mold 1, and adjust the retractable spring belt through the locking knob so that it is closely attached to the surface of the flexible core mold 1, and the flexible core mold 1 and the retractable spring belt are formed as a whole. After the above device is assembled, put it on the three-...

technical field

[0001] The invention relates to a matching forming device for a three-dimensional weaving machine for composite material products, in particular to a forming device and a forming method for a tubular three-dimensional weaving composite material product. Background technique

[0002] Three-dimensional braided composite material is a high-performance composite material with unique mechanical properties and uniform material characteristics. The fiber reinforced structure and its quality are the key to determine the performance of the composite material. The preformed parts of the three-dimensional braided composite material have many Outstanding features: First, the fibers in the workpiece are interwoven and the direction has the characteristics of arbitrary orientation, forming a structure similar to a homogeneous material, especially the fiber ratio in the thickness direction of the composite material is the same as that in the plane direction, effectively avoi...

Examples

Embodiment 1

[0037] The circular tubular three-dimensional braided composite product molding device of the present invention is used in conjunction with a three-dimensional braiding machine to prepare a uniform circular tubular three-dimensional braided fabric composite product. First, a certain volume of compressed air is poured into the flexible mandrel 1 to ensure that the mandrel 1 The pressure is about 3MPa. After the air pressure reaches the requirement, the inflation port of the mandrel 1 is sealed firmly, and then a retractable demoulding device 3 is installed on the outer surface of the flexible inflatable mandrel 1, and the demoulding device 3 is coated on the surface of the inflated mandrel 1, and The retractable spring belt is adjusted by the locking knob so that it is closely adhered to the surface of the flexible mandrel 1, and the flexible mandrel 1 and the retractable spring belt are integrated. After the above device is assembled, put it on the three-dimensional braiding m...

Embodiment 2

[0039] Using the square tubular three-dimensional braided composite product forming device of the present invention in conjunction with a three-dimensional braiding machine to prepare a uniform square tubular three-dimensional braided fabric composite product, first pour a certain volume of water into the flexible mandrel 1 to ensure the mandrel 1. The pressure is about 2MPa. After the water pressure meets the requirements, the water filling port of the mandrel 1 is sealed firmly, and then a retractable demoulding device 3 is installed on the outer surface of the flexible water-filled mandrel 1, and the demoulding device 3 is coated on the water-filled mandrel 1 surface, and adjust the retractable spring belt by locking the knob to make it closely adhere to the surface of the flexible mandrel 1, and form a whole with the flexible mandrel 1 and the retractable spring belt. After the above device is assembled, put it on the three-dimensional braiding machine to weave the square ...

Embodiment 3

[0041] The elliptical tubular three-dimensional braided composite product molding device of the present invention is used in conjunction with a three-dimensional braiding machine to prepare a uniform oval tubular three-dimensional braided fabric composite product. First, a certain volume of heat-conducting oil is poured into the flexible mandrel 1 to ensure that the mandrel 1 The pressure is about 2.5MPa. After the heat-conducting oil pressure reaches the requirement, seal the oil-filled port of mandrel 1 firmly, and then install a retractable demoulding device 3 on the outer surface of the flexible oil-filled mandrel 1, and the demoulding device 3 covers the oil-filled core The surface of the mold 1, and adjust the retractable spring belt through the locking knob so that it is closely attached to the surface of the flexible core mold 1, and the flexible core mold 1 and the retractable spring belt are formed as a whole. After the above device is assembled, put it on the three-...

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