I own a barbecue restaurant and we've been making sausages the past few months that we smoke. I've learned a lot the past few months, but I'm still having some issues, probably newbie issues.
I have a separate mincer and stuffer. The mincer is commercial-grade, the stuffer is a hand-crank with maybe a 2-3 liter canister, I find it suitable for our use. I use natural casings and make a variety of sausages: Texas-German sausages, Cumberland, Chorizo, etc.
Anyway...
Question 1: I have problems with the casings bursting in the stuffing process. Sometimes the casings will get stuck on the spout thing (like grip on) while the meat is still coming out and it will burst. My solution is just to move the casing toward the end of the spout so it feeds out easier and also to keep it wet with water. Does oil help? Any tips?
Question 2: Same as above except I have problems with the casings bursting when I twist them to make links. The casings I have seem sensitive, some seem more sensitive than others. Out of 30 links, at the most I'll burst 5, sometimes none. I tried making the sausage a bit more loose than full and plump since they tighten and plump up when you twist them.
Question 3: I also have issues with air pockets, I have a toothpick handy to poke the sausages with air in them. Are poked holes ok in sausage? I haven't noticed any juices leaking during the cooking process.
Question 4: Are collagen casings more durable than natural casings?
Question 5: Is it better to tie the first end when stuffing or leave it open until the end?