-This ensures there is no gap between the stem and spray nozzlecontact each other. Such openings due to worn can gradually cause a largematerial leakage problem.-Angle of spray stem taper should be large enough to get rid of the mold, but iftoo much will increase cooling time, cost of materials, time-consuming cutting the stalkspraying out of the product. If the angle of the taper is too small can cause difficulty when removing theOpen the mold spray when stalked. So, should the minimum taper angle is 1°.
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