Patent ID: 7484953

Claim:
In a synthetic resin injection molding assembly for producing a molded product the surface of which is replicated from a cavity of said molding assembly when a resinous molding material fills a cavity space defined by a mold insert of the assembly, wherein said mold assembly comprises said mold insert and a mold base for supporting said mold insert, the improvement wherein: said mold insert is divided into an insert front piece having a cavity surface; and, an insert rear piece without a cavity surface, wherein a groove for receiving an electric heater is formed to pass through said insert front piece in the vicinity of said cavity, and said groove extending from a rear surface of said insert front piece and there-through toward said cavity surface, a rib is provided on a front surface of said insert rear piece, and when said insert front piece is coupled to said insert rear piece containing said heater in said groove, said electric heater is pushed by means of a leading portion of said rib and is steadily disposed on a deepest portion of said groove.