Hockey blade with pin-reinforced core
View Patent ↗A construct for a hockey blade that includes a foam core. The foam core includes a first core face, a second core face, and a bottom core edge and a top core edge. Multiple pins are injected into the foam core, and one or more layers of resin preimpregnated tape are wrapped around the foam before forming a hockey blade structure in a heated mold.
1. A method of fabricating a formed hockey blade structure with a pin-reinforced foam core, comprising:
forming a foam core, the foam core comprising a first core face, a second core face, a top core edge, and a bottom core edge;
injecting a first plurality of discrete pins with a first spacing density of between 5 and 25% areal weight into a first area of the first core face, the first plurality of pins extending between the first core face and the second core face;
injecting a second plurality of discrete pins with a second spacing density less than the first spacing density into a second area of the first core face, the second plurality of pins extending between the first core face and the second core face;
wrapping the foam core with a layer of fiber tape extending along the first core face, the top core edge, the second core face, and the bottom core edge of the foam core, wherein the wrapped core has a first wrapped face, a second wrapped face, a top wrapped edge, and a bottom wrapped edge;
placing the wrapped foam core in a mold;
heating the mold;
cooling the mold; and
removing a formed hockey blade structure from the mold.
2. The method according to claim 1 , wherein the first plurality of discrete pins are regularly spaced apart from one another on the first core face.
3. The method according to claim 1 , wherein the plurality of discrete pins comprise fiber pins.
4. The method according to claim 1 , wherein the plurality of discrete pins comprise metallic pins.
5. The method according to claim 1 , wherein a selected first pin, from the plurality of discrete pins, is injected at a first angle relative to a surface normal of the first core face at a first point of injection of the first pin, and a selected second pin, from the plurality of discrete pins, is spaced-apart from the first pin, and injected at a second angle relative to a surface normal of the first core face at a second point of injection of the second pin.
6. The method according to claim 5 , wherein at least one of the first angle and the second angle is approximately equal to 0 deg.
7. The method according to claim 5 , wherein at least one of the first angle and the second angle ranges from 15 to 75 deg.
8. The method according to claim 5 , wherein the first pin is approximately parallel to the second pin when injected into the foam core.
9. The method according to claim 1 , wherein the plurality of discrete pins comprise epoxy-coated carbon fiber pins.
10. The method according to claim 1 , wherein the layer of fiber tape is a first layer, and the plurality of pins are injected through the first wrapped face, and extend through the foam core and out through the second wrapped face.
11. The method according to claim 1 , wherein the plurality of pins are injected into the foam core by an ultrasonic hammer.
12. The method according to claim 1 , further comprising:
positioning a guide foam structure proximate the first core face prior to the injecting the plurality of discrete pins, wherein the guide foam loosely retains at least a portion of the pins prior to the injecting the plurality of discrete pins into the foam core.
13. The method according to claim 1 , wherein the second plurality of discrete pins are regularly spaced apart from one another on the first core face.
14. A method of fabricating a formed hockey blade structure with a pin-reinforced foam core, comprising:
forming a foam core, the foam core comprising a first core face, a second core face, a top core edge, and a bottom core edge;
injecting a first plurality of discrete pins with a first spacing density into a first area of the first core face, the first plurality of pins extending between the first core face and the second core face;
injecting a second plurality of discrete pins with a second spacing density, less than the first spacing density, into a second area of the first core face, the second plurality of pins extending between the first core face and the second core face;
wrapping the foam core with a layer of fiber tape extending along the first core face, the top core edge, the second core face, and the bottom core edge of the foam core, wherein the wrapped core has a first wrapped face, a second wrapped face, a top wrapped edge, and a bottom wrapped edge;
placing the wrapped foam core in a mold;
heating the mold;
cooling the mold; and
removing a formed hockey blade structure from the mold.