Method of protecting cylinder liner transfer openings from casting material during injection die-casting of cylinders

Claim 1

A METHOD OF DIE-CASTING A CYLINDER AROUND A CYLINDER LINER, THE LINER HAVING AT LEAST ONE OPENING THROUGH THE WALL THEREOF AND WHEREIN THE CAST CYLINDER WILL INCLUDE AT LEAST ONE PASSAGEWAY LEADING TO THE OPENING IN THE LINER, THE STEPS COMPRISING: POSITIONING A TUBULAR METAL LINER HAVING AN OPENING IN THE WALL THEREOF SNUGLY UPON A CORE PORTION OF A DIE MOLD FORM WITH A SURFACE OF THE CORE PORTION PROVIDING COMPLEMENTARY SURFACE CONTOUR CONTINUITY WITH THE INNER SURFACE OF THE LINER, ENGAGING THE INNER PERIPHERAL EDGE OF THE LINER OPENING AND EXTENDING ACROSS THE LINER OPENING; COMPLETELY FILLING THE OPENING IN SAID CYLINDER LINER WITH A PLUG OF MATERIAL WHICH IS PRESSURE RESISTANT AND WILL NOT ALLOY WITH THE MATERIAL OF THE LINER OR THE CASTING MATERIAL, THE PLUG BEING IN INTIMATE ENGAGEMENT WITH THE EDGES OF THE OPENING AND HAVING SUBSTANTIALLY THE SAME THICKNESS AND CONTOUR OF THE LINER; DISPOSING THE LINER SO A TRANSFER PASSAGE CORE PORTION OF THE MOLD FORM IS POSITIONED ALONG THE EXTERIOR SIDE OF SAID LINER SNUGLY OVERLYING AND ENGAGING SAID FILLING MATERIAL IN SAID LINER OPENING AND TERMINATES ADJACENT AT LEAST A PART OF THE PERIPHERY OF THE OPENING; DISPOSING AN EXTERIOR DIE MOLD SURROUNDING SAID LINER AND CORE PORTIONS; AND DIE-CASTING A CYLINDER SURROUNDING SAID LINER BY MEANS OF A HIGH PRESSURE INJECTION CASTING PROCESS.

Claim 2

A METHOD OF DIE-CASTING A CYLINDER AROUND A CYLINDER LINER, THE LINER HAVING AT LEAST ONE OPENING THROUGH THE WALL THEREOF AND WHEREIN THE CAST CYLINDER WILL INCLUDE AT LEAST ONE PASSAGEWAY LEADING TO THE OPENING IN THE LINER, THE STEPS COMPRISING: POSITIONING A TUBULAR METAL LINER HAVING AN OPENING IN THE WALL THEREOF SNUGLY UPON A CORE PORTION OF A DIE MOLD FORM WITH A SURFACE OF THE CORE PORTION PROVIDING COMPLEMENTARY SURFACE CONTOUR CONTINUITY WITH THE INNER SURFACE OF THE LINER, ENGAGING THE INNER PERIPHERAL EDGE OF THE LINER OPENING AND EXTENDING ACROSS THE LINER OPENING; COMPLETELY FILLING THE OPENING IN SAID CYLINDER LINER WITH A PLUG OF MATERIAL WHICH IS PRESSURE RESISTANT AND WILL NOT ALLOY WITH THE MATERIAL OF THE LINER OR THE CASTING MATERIAL, THE PLUG BEING IN INTIMATE ENGAGEMENT WITH THE EDGES OF THE OPENING AND HAVING SUBSTANTIALLY THE SAME THICKNESS AND CONTOUR OF THE LINER; DISPOSING THE LINER SO A TRANSFER PASSAGE CORE PORTION OF THE MOLD FORM IS POSITIONED ALONG THE EXTERIOR SIDE OF SAID LINER SNUGLY OVERLYING AND ENGAGING SAID FILLING MATERIAL IN SAID LINER OPENING AND TERMINATES ADJACENT AT LEAST A PART OF THE PERIPHERY OF THE OPENING; DISPOSING AN EXTERIOR DIE MOLD SURROUNDING SAID LINER AND CORE PORTIONS; AND DIE-CASTING A CYLINDER SURROUNDING SAID LINER BY MEANS OF A HIGH PRESSURE INJECTION CASTING PROCESS.