Product Introduction:

1. There is a problem with the angle fit between the mold and the valve needle, or the gate is not made large enough - the spark position is not deep enough, which means that the valve needle and the mold do not fit well, resulting in the needle not reaching the bottom;

2. If the template is thick, the needle will also be short, so naturally it cannot reach the bottom;

3. Due to issues with the fitting of the valve needle and valve sleeve, as well as valve needle pulling, the movement may not be smooth, resulting in issues;

4. There is a problem with the sealing element of the hot nozzle cylinder, which causes air leakage and prevents the needle from reaching the bottom;

5. The air pressure is too low, causing the needle to not reach the bottom;

6. Insufficient temperature at the front end of the hot nozzle, caused by cold glue;

7. If the holding time is too long and the glue gets cold, the needle will not reach the bottom naturally;