Injection molding device and method

Injection molding device (1) comprising

• a. at least one injection mold (2, 3) with a first mold half (4) and a second mold half (5) during operation being displaceable with respect to each other in a first direction (z) between a closed position and an open position;
• b. the first mold half (4) and the second mold half (5) forming in the closed position at least one cavity (7) there between suitable to receive melted plastic material;
• c. the at least one cavity (7) comprising a first cavity section (9) and a second cavity section (10) interconnected to the first cavity section (9) by at least one constriction (11, 24, 25);
• d. an injection nozzle (13) opening into the first cavity section (9) in the closed position for injection of melted plastic material (21) into the first cavity section (9) and travels from there via the at least one constriction (11, 24, 25) into the second cavity section (10);
• e. wherein a first sensor arrangement (15) is arranged in a cavity wall (8) of to the first cavity section (9) and a second sensor arrangement (16) is arranged in a cavity wall (8) of the second cavity section (10).