Method of forming a one piece hockey stick
View Patent ↗A method of manufacturing a one piece, composite, hockey stick in an autoclave. A mandrel is provided which has a non uniform cross section. Pre-preg flags are wrapped around the mandrel. Provision is made so that when the wrapped mandrel is inserted in a pressure application tube, a portion of the wrapped mandrel is separated from the pressure application tube by one or more spacers. Pressure is then applied to the pressure application tube which in turn applies the pressure to the spacers. The spacers then apply the pressure to the wrapped mandrel to compact the pre-preg on the wrapped mandrel. Next the spacers are removed and the pre-preg is cured. Finally, a blade is formed around the pre-preg flag.
1. A method of manufacturing an elongated composite member having a tapered section, the method comprising:
providing a mandrel having a tapered section and a non-tapered section;
wrapping the tapered and non-tapered sections of the mandrel with at least one pre-prep flag;
placing at least one spacer outboard of the pre-prep flap along the tapered section of the mandrel, the spacer creating a substantially co-planar surface with the non-tapered section of the mandrel;
compacting the pre-preg flag with a pressure application tube and the spacer;
curing the pre-preg flag to form the elongated composite member; and
separating the elongated composite member from the tube, spacer and mandrel.
2. The method of claim 1 wherein:
an amount of compaction at the non tapered section and an amount of compaction at the tapered section are independent of one another.
3. The method of claim 1 further comprising:
infusing a blade into the tapered section of the member; and
curing the blade.
4. A method of manufacturing an elongated member, the method comprising:
defining a shape of the member with a mandrel having a tapered section and a non tapered section;
wrapping the tapered and non tapered sections of the mandrel with at least one pre-prep flap;
compacting the pre-preg flag wrapped around the non tapered section of the mandrel with a pressure application tube;
compacting the pre-preg flag wrapped around the tapered section of the mandrel with at least one spacer within the pressure application tube, the spacer creating a substantially co-planar surface between the tapered and non tapered sections of the mandrel;
curing the pre-preg flag to form the elongated member; and
separating the elongated member from the tube, spacer and mandrel.
5. The method of claim 4 further comprising:
infusing a blade into the tapered section of the member; and
curing the blade.
6. The method of claim 1 wherein the tube has a substantially constant inner diameter.
7. The method of claim 1 wherein the non tapered section of the mandrel has a substantially rectangular cross-section and the at least one spacer further comprises two substantially triangular overpresses.
8. The method of claim 1 wherein the elongated composite member further comprises a shaft of a hockey stick.
9. The method of claim 4 wherein the tube has a substantially constant inner diameter.
10. The method of claim 4 wherein the non tapered section of the mandrel has a substantially rectangular cross-section and the at least one spacer further comprises two substantially triangular overpresses.
11. The method of claim 4 wherein the elongated member further comprises a shaft of a hockey stick.
12. A method of manufacturing an elongated composite member having a tapered section, the method comprising:
providing a mandrel having a first section and a second section extending from said first section, the second section having a taper relative to said first section;
wrapping the first and second sections of the mandrel with at least one pre-preg flag;
placing at least one overpress outboard of the pre-preg flag along the second section of the mandrel, the overpress creating a substantially co-planar surface with the first section of the mandrel;
compacting the pre-preg flag with a pressure application tube and the overpress;
curing the pre-preg flag to form the elongated composite member; and
separating the elongated composite member from the tube, overpress and mandrel.