Fastening and sealing of manifolds

Two basic conditions should be met when manifolds are fastened  

Manifolds are fastened in the mould by tightening the mould plates, or by being directly bolted on. 

In practice, hybrid systems are increasingly frequently encountered, where the manifold is simultaneously bolted on and clamped down, which reduces the risk of seal failure. Much attention is given to ensuring that manifolds with external heating can withstand leakage. Manifolds with screw-in nozzles have been developed for this reason. 

The contact area of the pressure discs with the mould clamping plate has been rednced (by recessing) to decrease heat losses, and very large snrface pressures are transferred through them (see Chapter 4.2.1.5). 

1) locate nozzles in mould plate and check whether their height is identical (above the plane of the plate) to a tolerance of 0.01 mm  

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