Hockey stick blade
View Patent ↗A hockey stick blade comprising an elongated fiber-reinforced polymer body having a fiber-reinforced polymer front face element and a fiber-reinforced polymer rear face element. The rear face element is spaced apart from the front face element. The blade also comprises a plurality of elongated longitudinal cavities within the body between the front face element and the rear face element. The longitudinal cavities have curved ends in transverse cross-section. The longitudinal cavities define at least one fiber-reinforced polymer structural member interconnecting the front face element and the rear face element. The at least one structural element is biconcave in transverse cross-section. The hockey stick blade has a neck, a heel and a toe. A method of bladder molding a hockey stick blade is also disclosed.
1. A method of fabricating a hockey stick blade having spaced apart rear and front face elements, the method comprising:
providing at least two inflatable bladders;
separately wrapping each of the inflatable bladders with at least one respective inner pre-preg composite element;
placing the wrapped inflatable bladders side by side and aligned with one another;
collectively wrapping the aligned wrapped inflatable bladders with an outer pre-preg composite element;
placing the collectively wrapped inflatable bladders within a mold having a general form of a hockey stick blade;
inflating the collectively wrapped inflatable bladders within the mold;
heating the mold to cure the pre-preg composite elements to define the spaced apart rear and front face elements with the outer pre-preg composite element and to define a fiber-reinforced polymer structural member interconnecting the rear and front face elements with the inner pre-preg composite element compressed between each adjacent ones of the bladders;
removing the cured hockey blade structure from the mold;
deflating the inflatable bladders and removing at least a portion of the inflatable bladders from the cured hockey stick blade structure; and
sealing openings in the hockey stick blade structure from which the inflatable bladders were removed, wherein sealing openings includes adding supplemental pre-preg composite material over each opening, inserting the hockey blade structure with the supplemental pre-preg composite material in an additional mold, and curing the supplemental pre-preg composite material.
2. The method of fabricating a hockey stick blade of claim 1 , further comprising severing the inflatable bladders at a point outside of the hockey stick blade structure.
3. The method of fabricating a hockey stick blade of claim 1 , wherein the individually wrapped inflatable bladders are placed side by side such that each individually wrapped inflatable bladder has two elongated portions extending side-by-side interconnected by a U-shaped end.
4. The method of fabricating a hockey stick blade of claim 1 , further comprising, before placing the collectively wrapped inflatable bladders within the mold, placing at least one supplemental pre-preg composite element about the collectively wrapped inflatable bladders.
5. The method of fabricating a hockey stick blade of claim 1 , wherein the general form of the hockey stick blade defined by the mold includes a blade portion and a neck portion, the collectively wrapped inflatable bladders being placed within the mold such that the bladders extend along a longitudinal length of the blade portion and curve to extend into the neck portion, each bladder being connected to a nozzle extending out of the neck portion.
6. The method of fabricating a hockey stick blade of claim 1 , wherein the general form of the hockey stick blade defined by the mold includes a blade portion and a neck portion, the collectively wrapped inflatable bladders being placed within the mold such that the bladders extend along a longitudinal length of the blade portion without extending through the neck portion, each bladder being connected to a nozzle extending out of the blade portion in proximity of the neck portion.
7. The method of fabricating a hockey stick blade of claim 1 , wherein the general form of the hockey stick blade defined by the mold includes a blade portion and a neck portion, the blade portion having a toe end opposite the neck portion, the collectively wrapped inflatable bladders being placed within the mold such that the bladders extend along a longitudinal length of the blade portion and curve to extend into the neck portion, each bladder being connected to a nozzle extending out of the toe end.
8. The method of fabricating a hockey stick blade of claim 1 , wherein the general form of the hockey stick blade defined by the mold includes a blade portion and a neck portion, the blade portion having a toe end opposite the neck portion, the collectively wrapped inflatable bladders being placed within the mold such that the bladders extend along a longitudinal length of the blade portion without extending through the neck portion, each bladder being connected to a nozzle extending out of the toe end.