Interchangeable mold blade

1 . A blade arrangement comprising:

a blade comprising a blade edge; and

a fastening element being adapted to removably fasten the blade onto a first mold half in a pocket formed by complementary recesses of the first mold half and a second mold half, wherein the pocket extends over the mold halves.

2 . The blade arrangement of claim 1 , further comprising a bed blade and a second fastening element adapted to removably fasten the bed blade onto the second mold half in the pocket formed by the complementary recesses, wherein the blade and the bed blade form complementary cutting pieces.

3 . The blade arrangement of claim 1 , wherein the fastening element comprises a screw.

4 . The blade arrangement of claim 1 , wherein the fastening element comprises at least one of a pin and a friction-fit surface.

5 . The blade arrangement of claim 1 , wherein the blade is adapted to cut material placed between the first and second mold halves.

6 . The blade arrangement of claim 1 , wherein the blade is adapted to fit substantially within the pocket.

7 . A mold arrangement comprising:

first and second mold halves having complementary recesses that form a pocket extending over the first and second mold halves when the mold is closed; and

a blade comprising a blade edge and being removably fastened onto the first mold half in the pocket formed by the complementary recesses.

8 . The mold arrangement of claim 7 , further comprising a bed blade removably fastened onto the second mold half in the pocket formed by the complementary recesses, wherein the blade and the bed blade form complementary cutting pieces.

9 . The mold arrangement of claim 7 , wherein the blade is removably fastened onto the first mold half by at least one of a screw, a pin and a friction-fit surface.

10 . The mold arrangement of claim 7 , wherein the blade is adapted to cut material placed between the first and second mold halves.

11 . The mold arrangement of claim 7 , wherein the blade fits substantially within the pocket.

12 . A method comprising:

removing a first cutting arrangement from a pocket formed by complementary recesses of first and second mold halves, the first cutting arrangement being a first one of a pinch bar arrangement and a blade arrangement, wherein the pocket extends over the first and second mold halves; and

removably fastening a second one of the pinch bar arrangement and the blade arrangement onto the mold in the pocket formed by the complementary recesses.

13 . The method of claim 12 , wherein the removably fastening comprises fastening a blade and a bed blade onto the mold in the pocket formed by the complementary recesses, the blade and the bed blade forming complementary cutting pieces.

14 . The method of claim 12 , wherein the removably fastening comprises using at least one of a screw, a pin and a friction-fit surface.

15 . The method of claim 12 , further comprising removably fastening the first one of the pinch bar arrangement and the blade arrangement in the pocket before the removing of the first cutting arrangement, wherein the removing of the first cutting arrangement comprises unfastening the first one of the pinch bar arrangement and the blade arrangement from the pocket.

16 . The method of claim 12 , wherein the removably fastening comprises fitting the blade arrangement substantially within the pocket.

17 . The method of claim 12 , wherein a width of the pinch bar arrangement is substantially the same as a width of the blade arrangement.

18 . A method comprising:

placing a material between first and second mold halves, the first and second mold halves having complementary recesses that form a pocket extending over the first and second mold halves when the mold is closed, wherein a blade comprising a blade edge fits within the pocket and is removably fastened onto the first mold half in the pocket formed by the complementary recesses; and

cutting the material placed between the first and second mold halves with the blade.

19 . The method of claim 18 , further comprising removably fastening a bed blade onto the second mold half in the pocket formed by the complementary recesses, wherein the blade and the bed blade form complementary cutting pieces.

20 . The method of claim 18 , further comprising removably fastening the blade onto the first mold half by at least one of a screw, a pin and a friction-fit surface.

21 . The method of claim 18 , wherein the cutting comprises closing the mold formed of the first and second mold halves.

22 . The method of claim 18 , wherein the material is a parison.