Slide movement example using an angle pin and locking with a heel block

Slide movement example using a standard cylinder to actuate the heel block

Slide movement example of a hydraulic locking core pull cylinder

Compare to the traditonal slide assemblies, a hydraulic locking core pulls cylinder has the followeing advantages:
hydraulic locking core pulls cylinder advantage 1-Accommodate Smaller Mold Bases.
As usual if use the traditional method way to pull the slide core when the mould has small mould base,then the mould designer always have to fit all traditional componets in a small mould base.Usually ,the mosre commonly used way is putting horn or angle pins(see Figure 1)to pull the core slide,and there usually a heel bolcks used behind slide core to hold the inejction pressure which not only occupy the mould space but also back off the platen movement.if not using hydraulic locking core pulls cylinder but typical traditional slide way just a waste of mould space and added the cost.
An alternative method is to use a hydraulic locking core pulls cylinder ,it uses a seperated rings that presses into an internal groove inside of the cylinder assembly .it closed when the oil come inside from one port and when it reachs the end,the slide locking part will start working and lock the piston at one postion,and when the inejction is finished,the other oil port start letting the oil in.and it is unlocked .Thus,if using a hydraulic locking core pulls cylinder, the injection pressure from the cavity acts to the seperated ring,locking the slide without needing a heel block.so all these will get a smaller mould base size which resolves mould designs、reduce materail cost and of course overall cost.
hydraulic locking core pulls cylinder advantage 2-lessen material shrinkage.
Another important advantage for using hydraulic locking core pulls cylinder advantage is that the opening movement operates independently and the piston can be retracted before the mould opens,which means it can reduce injection cycle time.hydraulic locking core pulls cylinder .
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