SEIATSU Components
 
Automatic pattern change stations enable complete pattern sets to be exchanged within the cycle time. A lifting table lifts the previously used pattern set off the turntable, or lowers the new set into position. Driven rollerways take the pattern sets to and from the station.


The pattern set consists of the pattern plate carrier and exchangeable pattern plates. The pattern plate carriers are supplied with a ring of apertures to allow the compacting air to escape. If required, the pattern plate carriers can be equipped with heating elements.

Each pattern plate has a code number under which all the parameters for the mould manufacture are stored.


Dosing Device
The dosing device is pivot mounted and supported on a load cell, which stops the sand feed as soon as a pre-programmed weight has reached to the sand container. The sand is released via pivoted flaps on the outlet of the sand container, so that the sand is evenly distributed in the mould. Underneath the pivoted flaps, a spray device is provided to apply the separating medium to the pattern.

The sand dosing device can be equipped additionally with a fine sand slinger.

The SEIATSU Valve
The SEIATSU valve is a hydraulically controlled plate valve, which opens up a of large cross section aperture in a fraction of a second, and it also generates a powerful air current for compacting the moulding sand. The time of opening and the opening stroke of the valve plates can be individually adjusted in order to achieve optimum conditions for the compacting of the mould.
 



The Hydraulics
The provision of a central hydraulic station is fundamental for hws moulding lines. Preferably these hydraulic stations are accommodated in a separate basement. This allows all the oil in the hydraulic circuits to be constantly monitored, cleaned and held at the operating temperature.

The hydraulic valves are mounted on distribution blocks in such a way that they can be dismantled without disconnecting piping. The operation sequences are in the main controlled by means of proportional and servo valves from Rexroth. Hydraulic cylinders are made in-house.


The Electronics
hws Moulding lines of the new generation are equipped with decentralised electronic controls. These consist of a switchgear cabinet with the central automation unit and a series of manually controlled panels, conveniently arranged in the vicinity of the equipment to which they belong. The manual control panels are of the Siemens Coros operator panel type, and facilitate both monitoring and correction of the line functions. The connection between Automation equipment and the Operator Panel is either in the form of a 2-wire BUS cable or via light waves.