Everyone is used to what is required for forming the matrix and punch. In many cases, however, can do without the surround matrix — sufficient and shaped holes in sheet metal or plywood. But without the surround of the punch!..
Ship modelers from the station of young technicians of the Czechoslovak Olomouc could do without this, very hard to produce parts, using instead a framework consisting of three flat plywood plates. How it works — shown in the drawings. The top plate is cut along the contour of the deck, the second loop plane, the third line crossing the bottom and sides. All three parts are connected by studs and bead of triangular cross-section, the top is glued wooden dowel for rigidity.
The matrix is a plywood plate with a hole that follows the outline of the deck increased by the contour to the thickness of the case material, plus 0.5—1 mm.
Design of punch and die for stamping enclosures boat:
1 — frame-punch. 2 — matrix (plywood with a thickness of 10-12 mm) 3 — thermoplastic with a thickness of 1 to 1.5 mm 4 — bars mounting thermoplastic, 5 — reinforcing pad.