PRESS MOULDING METHOD

摘要

A method of press moulding a moulding material to form a moulded part of fibre-reinforced resin matrix composite material, the method comprising the steps of:
i. providing a mould tool having a lower mould part and an upper mould part, the upper mould part having a first moulding surface for moulding a first moulded surface of the moulded part and the lower mould part having a second moulding surface for moulding a second moulded surface of the moulded part;ii. providing a multilaminar panel of moulding material comprising at least one layer of dry fibres and at least one layer of resin, the multilaminar panel having first and second opposite major surfaces;iii. locating the moulding material in the mould tool;iv. closing the mould tool to define a substantially closed mould cavity containing the moulding material, the closing step including a compression stage, in which the first moulding surface contacts the first major surface and the second moulding surface contacts the second major surface, the compression stage compressing the moulding material to cause progressive resin impregnation of the dry fibres without increasing the resin pressure to a minimum threshold value to cause excessive resin bleed out from the cavity, optionally to reduce any resin bleed out to no more than 600 grams of resin per square metre of the moulding material;v. applying pressure to the moulding material in the mould cavity to configure the moulding material in a fully moulded shape; andvi. substantially fully curing the resin to form a moulded part from the moulding material.

主权项

1. A method of press moulding a moulding material to form a moulded part of fibre-reinforced resin matrix composite material, the method comprising the steps of:
i. providing a mould tool having a lower mould part and an upper mould part, the upper mould part having a first moulding surface for moulding a first moulded surface of the moulded part and the lower mould part having a second moulding surface for moulding a second moulded surface of the moulded part; ii. providing a multilaminar panel of moulding material comprising at least one layer of dry fibres and at least one layer of resin, the multilaminar panel having first and second opposite major surfaces; iii. locating the moulding material in the mould tool; iv. closing the mould tool to define a substantially closed mould cavity containing the moulding material, the closing step including a compression stage, in which the first moulding surface contacts the first major surface and the second moulding surface contacts the second major surface, the compression stage compressing the moulding material to cause progressive resin impregnation of the dry fibres without increasing the resin pressure to a minimum threshold value to cause excessive resin bleed out from the cavity, optionally to reduce any resin bleed out to no more than 600 grams of resin per square metre of the moulding material; v. applying pressure to the moulding material in the mould cavity to configure the moulding material in a fully moulded shape; and vi. substantially fully curing the resin to form a moulded part from the moulding material.