Plate type screen changer compared to column type screen changer: continuous screen changing, channel sealing, and scheme comparison logic
1、 Both plate and column screen changers can be equipped with structures that support continuous production.
The combination of single board dual station and energy storage hydraulic station can achieve rapid screen replacement; Single column circular dual station also has a similar continuous configuration. 'Single board ≠ single workstation, does not mean that the machine must be shut down for network replacement '.
Double board dual station and dual column dual station models mostly adopt a dual channel design, with dual networks working synchronously and alternately switching. By relying on the connection of flow channels, the continuous passage of molten metal is ensured during the screen changing period.
To determine whether there is continuous screen changing capability, it is necessary to confirm the number of online workstations during normal production, how the screen changing process channels are switched, and how the new filter station is put into use. Continuous network switching is a joint implementation of the entire structure, and the pressure fluctuations, flow changes, and product quality impacts caused by switching still need to be evaluated in conjunction with on-site operating conditions.
2、 Flow channels and seals depend on the specific product design
When comparing plate and column screen changers, we cannot only look at the major categories, but also focus on the product flow channel and sealing structure.
The single board model adopts a straight channel+flexible pressure activated seal; The single column circular model has a rigid seal; The dual board dual station adopts a split structure and is equipped with material feeding and exhaust functions.
Consider as needed when selecting:
High viscosity materials: Check the melt viscosity at working temperature and evaluate the flow capacity
Frequent color change production: focus on the difficulty of cleaning up internal residual materials
Stay sensitive materials: Assessing dead corners in flow channels and material retention risks
The scheme review requires checking the flow path direction, retention risk, ease of disassembly and cleaning, as well as the tolerance of the seal under operating temperature and pressure.
3、 Scheme comparison requires a unified comparison premise
To compare the schemes of plate and column screen changers, it is necessary to first unify the following basic conditions:
Materials and operating conditions: material type, working temperature, melt viscosity, rated output and adjustable range
Filtration indicators: filter accuracy, effective filtration area, allowable pressure difference
Production requirements: Is it allowed for a brief shutdown during network replacement, and is there an acceptable range of pressure and flow fluctuations
Installation space: equipment placement, carrier movement distance, reserved space for network replacement and maintenance
Network replacement operation: estimated frequency of network replacement, manual/hydraulic drive, on-site supporting power
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