Cast Iron Plunger head/ Cast Iron Plunger tip

Instructions for use and notes of the plunger tip

1. The sprue bushing and the shot sleeve should be correctly axially fit witheach other; otherwise they will result in the unilateral tensioned damage and unilateral wearing of the plunger tip;

2. Preheat the plungertip beforeusing, because it can eliminate the gap between the shot sleeve and sprue bushing, so as to avoid the strainof the plunger tip. Shot several modes slowly on the plungertip when opening the machine. it can also make the gap betweeniniection and solution cup idealized.

3. The mechanical properties of the plungertip willlost at high temperature, and the water cycle cooling can be used as much as possible to extend the service life of the plunger tip.

4. Although the graphite in nodular castiron presents pellets which have oillubrication function, the spherical graphite is extremely small. The suggestion is that theusers should use low molecular weight lubricating oil to extend the service life of the plunger tip.

5. The user should roughly determine the tolerance coefficient of the plunger according to the sizes of the plunger, cooling conditions and the shot sleeve conditions. The tolerance coefficient isusually selected form 0.10% to 0.17% to calculate the tolerance of the plunger.