Method and apparatus for manufacturing composite material
AssigneesHyundai Motor Company, Kia Corporation, Unist (Ulsan National Institute of Science and Technology)
InventorsSang Won Lim, Sang Jae Yoon, Young Bin Park, Woo Seok Ji, Soo Chang Kang, Seong Woo Im
Life of this patent
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Abstract
A method of manufacturing a composite material through a wet compression molding (WCM) process is disclosed. The internal pressure of a mold is controlled so that productivity may be improved due to process automation through application of a resin using a robot. Quality of the composite material may be improved due to minimization of deformation of a foam core through control of the internal pressure of the mold.
Claims16
A method of manufacturing a composite material, the method comprising:
- applying, using a resin injector, a resin to an upper surface of a preform having at least one fiber and foam;
- executing, using a press, compression molding of the preform having the resin applied thereto by lowering an upper slide of a mold and raising a lower slide of a mold;
- determining, using a pressure sensor, whether or not an internal pressure of the mold exceeds a predetermined pressure value;
- and
- controlling the internal pressure of the mold by reducing a raising speed of the lower slide in real-time upon determining that the internal pressure of the mold exceeds the predetermined pressure value,
- wherein compressive strength of the foam is in a range of 10 bar to 100 bar.
A method of manufacturing a composite material, the method comprising:
- applying, using a resin injector, a resin to an upper surface of a preform having at least one fiber and foam;
- executing, using a press, compression molding of the preform having the resin applied thereto by lowering an upper slide of a mold and raising a lower slide of a mold;
- determining, using a pressure sensor, whether or not an internal pressure of the mold exceeds a predetermined pressure value;
- and
- controlling the internal pressure of the mold by reducing a raising speed of the lower slide in real-time upon determining that the internal pressure of the mold exceeds the predetermined pressure value,
- wherein executing the compression molding of the composite material further comprises:
- raising the lower slide at a speed in a range of 50 millimeters per second (mm/s) to 100 mm/s when a gap between the upper slide and the lower slide is in a range of 5 millimeters (mm) to 10 mm, and raising the lower slide at a speed in a range of 0.5 mm/s to 1.0 mm/s when the gap between the upper slide and the lower slide is in a range of 2 mm to 5 mm;
- and
- executing the compression molding of the preform.
A method of manufacturing a composite material, the method comprising:
- applying, using a resin injector, a resin to an upper surface of a preform having at least one fiber and foam;
- executing, using a press, compression molding of the preform having the resin applied thereto by lowering an upper slide of a mold and raising a lower slide of a mold;
- determining, using a pressure sensor, whether or not an internal pressure of the mold exceeds a predetermined pressure value;
- and
- controlling the internal pressure of the mold by reducing a raising speed of the lower slide in real-time upon determining that the internal pressure of the mold exceeds the predetermined pressure value,
- wherein controlling the internal pressure of the mold by reducing the raising speed of the lower slide further comprises:
- reducing the internal pressure of the mold by adjusting the raising speed of the lower slide to 0.01 mm/s to 0.50 mm/s.
Dependencies are inferred from the claim text.