Special Design Solutions
On customer request, HWS realises all types of modules required for the moulding system insofar as technically and physically possible. In general, HWS works closely with the customer to find optimum solutions for the respective application case.
Emptying concepts for core and green sand separation
HWS has already installed a range of emptying concepts for core and green sand separation for a number of manufacturers of automotive cast parts on moulding systems. With these systems, as much green sand as possible is fed back to the sand treatment system prior to emptying the cast part at the separation unit. When the cast parts are removed, only the core sand and residual green sand are present at the separation unit.
Fine sand slinger
The fine sand slinger reduces errors in the cast part surface, which arise due to lumps in the mould sand and lead to increased cleaning work. The coarse sand is ground by a roller brush and uniformly applied to the model surface, refined with the remaining sand. The fine sand slinger can be integrated in the sand hopper of the moulding machine or arranged upstream of the moulding machine as a separate unit.
Advantages of the fine sand slinger:
- Faultless filling of tight model pockets
- Precise contours reproduced with complex model sections
- Significant improvement in the surface structure
- Improved compaction effect
In order to attain up to 100mm overpressing of the cope part mould, HWS utilises sand milling. This mills the sand with rotating blade heads along the mould flask. The unit can be directly integrated in new moulding systems or retrofitted to existing systems.
Automatic core setting device
To guarantee cycle time and precision when inserting cores, HWS constructs automatic core setting devices. The cores are manually or automatically inserted in an insertion gauge or assembled and subsequently picked up by a grabber gauge and placed in the mould flask. During insertion, both the mould flask and the core setting device are precisely centred, to insert the core exactly in the mould.