boil-freeze

[ninja man 111]

what is the huge disadvantage of boil then frezzing, will it have to rapid of a chemical change, thus making it weak

[skip0l]

chemical change cannot be accomplished through a physical process such as freezing or boiling.

[AttackMan17]

It will have too rapid of a temperature change, therefore making the head a bit weaker.

[sammyduelist]

not a chemical change really, but it will definatly make it weaker

[slinkyspine]

the rapid tempurature change changes the temper of the head making it weaker

[AusBadger]

It are physical change it changes the formation of it particles duh!
it becomes less flexible and becomes brittle

[atacklax]

Yea, just let the head sit out for a while. That should help it maintain its strength.

[DQLAX22]

put it in the fridge for like 2 hours after boiling it (to pinch it i think that is what u r taking about) then take it out and dont play with it for like a day worked fine on my razor didnt lose any stiffness

[steveissogreat]

I usually boil then let sit for a good hour or 2 at room temp, then throw it in the freezer for about half a day then just let it sit in my room for about another day or so, the loss in stiffness is hardly noticable. hardly any loss.

[lizlax22]

ok time for the mechanical engineering tech. student to have a crack at this one...

the whole boiling then freezing process doesnt CHEMICALY change anything about the material (nylon) of the head. but with that said the physical structure of the material has been compromised. with all materials that have been subject to heat, they expand as we all know. and in turn rapid cooling causes materials to contract ("but lizlax, water expands when its frozen..." ok so there's one exception -.-) anyways... when the head is made, a plastic injection molder "squirts" heated liquifided nylon into a mold (now here where it gets tricky to understand) the nylon travels though a series of little tubes within the mold that evenly distribute the material through out the head. lets say for demonstrational purposes there is a tube that goes to the scoop of the head and another tube that goes to the throat. the nylon will enter the mold at these 2 points and converge in the center or in this case the sidewalls of the head. where the nylon meets there will be what it called a weld in the product. this weld is a small (in most cases can not be seen with the naked eye) inperfection in the head or a weak spot. when you heat ur stick and then rapidly cool it you put stresses on these welds which in turn can make ur stick slightly weaker though you might not notice any obvious differences with your head. and this is why your warrenty is no good once u pinch your stick

wow... that was a long one, hope it made sence :dummy:

[FaceOffMan4]

wow you must pay lots of attention in chemestry class. well done and thats exactly right i know it too :)

[RockStar]

Lacrosse heads are made of thermoplastics which can be heated and cooled without significant effect to their properties.

Rapid cooling is no good, though.

If you boil your stick to dye it or pinch it, and then cool it slowly, you will not affect the material strength. Dying alone does not affect the strength. If you adjust the shape of the head by pinching, you change it's structural properties and it can really affect the overall stiffness of the stick.

So, proceed with caution, and note that the best way for controlled-rate cooling is to slowly add cold water to the bucket or pot you're using for the dye/pinch job.

[laxgod1790]

ok time for the mechanical engineering tech. student to have a crack at this one...

the whole boiling then freezing process doesnt CHEMICALY change anything about the material (nylon) of the head. but with that said the physical structure of the material has been compromised. with all materials that have been subject to heat, they expand as we all know. and in turn rapid cooling causes materials to contract ("but lizlax, water expands when its frozen..." ok so there's one exception -.-) anyways... when the head is made, a plastic injection molder "squirts" heated liquifided nylon into a mold (now here where it gets tricky to understand) the nylon travels though a series of little tubes within the mold that evenly distribute the material through out the head. lets say for demonstrational purposes there is a tube that goes to the scoop of the head and another tube that goes to the throat. the nylon will enter the mold at these 2 points and converge in the center or in this case the sidewalls of the head. where the nylon meets there will be what it called a weld in the product. this weld is a small (in most cases can not be seen with the naked eye) inperfection in the head or a weak spot. when you heat ur stick and then rapidly cool it you put stresses on these welds which in turn can make ur stick slightly weaker though you might not notice any obvious differences with your head. and this is why your warrenty is no good once u pinch your stick

wow... that was a long one, hope it made sence :dummy:

I made it through 2 sentences. Up until the little injection part.

[navyboy28]

Lacrosse heads are made of thermoplastics which can be heated and cooled without significant effect to their properties.

Rapid cooling is no good, though.

If you boil your stick to dye it or pinch it, and then cool it slowly, you will not affect the material strength. Dying alone does not affect the strength. If you adjust the shape of the head by pinching, you change it's structural properties and it can really affect the overall stiffness of the stick.

So, proceed with caution, and note that the best way for controlled-rate cooling is to slowly add cold water to the bucket or pot you're using for the dye/pinch job.
ignore him. the chem/tech wiz said it perfectly. i will make it easier to understand for you though. the plastic molding process has an imperfection where the 2 sides of the mold meet. rapid heating/cooling will weaken this imperfection. it may make your head more brittle but as long as you play in a controlled manner and dont flail your stick around you should be fine. not good for defensemen though.

[iTaylor_686]

what is the huge disadvantage of boil then frezzing, will it have to rapid of a chemical change, thus making it weak

Just dont put the head in the freezer when your done... Put it in the sink with cold water or rinse it off w/ a hose