HFC pouring system capable of preparing mechanical sampling test block on line

The invention discloses an HFC pouring system capable of preparing a mechanical sampling test block on line, the HFC pouring system comprises an upper die and a lower die, the upper end face of the upper die and the upper end face of the lower die are provided with annular extrusion pouring gates, mechanical sampling test block cavities and exhaust grooves which are correspondingly arranged; the annular extrusion runner, the mechanical property sampling test block cavity and the exhaust groove are communicated with one another, the mechanical property sampling test block cavity is a circular truncated cone-shaped cavity, the minimum diameter of the mechanical property sampling test block cavity is d, and the maximum diameter D of the mechanical property sampling test block cavity is equal to k1 * d, the length L of the mechanical property sampling test block cavity is equal to k2 * d, 1.5 < = k1 < = 2, 12 < = k2 < = 15, and d is a calibration value corresponding to a target mechanical property sampling test b