Spray head device and sandblasting device for automobile part processing

A sandblasting device for automobile part processing, comprising:

• a sand cylinder (3),
• a feeding pipeline (4), and
• a spray head device comprising:
• a spray head body (1) and a connecting pipe (2), wherein a conical through hole (11) is penetratingly arranged in the spray head body (1), one end of the conical through hole (11) forms a discharge port (12), and the other end of the conical through hole (11) forms a feed port (13);
• a caliber of the feed port (13) is greater than that of the discharge port (12), the connecting pipe (2) is fixedly connected to the feed port (13) of the spray head body (1), the connecting pipe (2) is arranged coaxially with the conical through hole (11), and the caliber of the connecting pipe (2) is adapted to that of the feeding port (13);
• multiple spiral trunkings (14) are arranged at intervals on an inner wall of the conical through hole (11), the spiral trunkings (14) extend from one end of the feeding port (13) to one end of the discharging port (12), and two ends of the spiral trunkings (14) are arranged to be through the spray head body (1);
• and
• multiple injection pipes (15) are evenly spaced along a circumferential direction of a side wall of the connecting pipe (2), and the injection pipes (15) communicate with the connecting pipe (2);
• wherein one end of the feeding pipeline (4) is connected to the sand cylinder (3), and the other end of the feeding pipeline (4) is connected to the connecting pipe (2) of the spray head device, and microtextures (5) are provided at intervals on the inner wall of the feeding pipeline (4).