The machines to make the bumpers are like very big machines. I dont know if your kayak was machine molded, if so, it would be a reall incredible machine

How they work is a mold (big metal block that splits in half and have cavitys in them, my molds are about 2X2X2) The machine closes the mold, injects plastic at about 20,000 psi through a 3/16th hole, then through the gates to each cavity which are about 4,000th wide. Really incredible machines, the newer ones can clamp up to 2500 tons (the ones that make bumper) and you can put your finger in the mold and it will detect it before it smashes your finger (its called mold protect) <img src="/forums/images/graemlins/notooth.gif" alt="" /> The biggest mold ever makes the hood one a john deere tracker. When you look at something plastic, look at the mold and how it is made, look at the mold lines and try to figure out what the mold looks like, the ones with inner threads are amazing molds. Look inside your truck, you will be amazed on how much is actually made by these machines.


this mold clamps at 1650 tons

K back to the subject. Not 7.5 ounces in weight, but amount. It has a 7.5 ounce barrel (where it melts) from there is goes into the mold. snorkels are too big (~20 ounces). We need somthing that we can make in the thousands. Dont we have tail light protection?

k them coming this is awsome.
kevan

oh yeah guys, i can make stuff it out of a soft rubber too.
injection mold info