Extruder Specifications
Screw diameter, length-to-diameter ratio, and driving power determine the production capacity and the range of matching mold extrusion output.
Extrusion Output Range
Maximum/Stable Output (kg/hr) - The "applicable extrusion output" of the mold must fall within this range.
Connecting Flange
Outlet flange dimensions and positioning method (center height/bolt hole positions) are the key to physical compatibility and must be completely consistent; otherwise, installation will not be possible.
Product Specifications
Planned sheet width and thicknessThe mold's width and thickness range must cover your requirements.
Material type
Is the main material PP, PC, or others? This determines the mold runner and structural design. For example, PC has different flow properties than PP.
Product structure
Single-layer, multi-layer co-extrusion, hollow rib shape (mouth, field, rice, etc.). This determines whether to select a single-layer die or a multi-layer die with a co-extrusion distributor.
Production line control
The type of existing control system (PLC brand, interface) affects whether new auxiliary machines (traction, cutting) can be successfully integrated and synchronously controlled.
1. Mold Selection
Select based on material and structure: Clarify whether to produce PP or PC sheets, as the mold designs for the two materials are different. If you need to produce composite boards of PC and UV layers to improve weather resistance, you need to select a multi-layer composite mold with a co-extrusion distributor.
Focus on adjustability: Prioritize molds equipped with fine adjustment of upper and lower die lips and independent adjustment of lip air volume. This facilitates rapid adjustment of board thickness and shape, which is particularly important for adapting to fluctuations in used main machines.
Consider maintenance services: Ask suppliers if they provide repair and modification services for old molds, which may be more cost-effective than purchasing new molds.
2. Auxiliary Equipment Configuration
Auxiliary equipment must be synchronously linked with the mold and main machine speed. The basic configuration includes:
Shaping and Cooling Device: Hollow sheets usually require a vacuum shaping table and large-scale forced cooling equipment to ensure dimensional stability and product quality.
Traction Machine: It needs to have large and stable traction force, and its speed must be precisely adjustable to control the final dimensions of the sheet.
Cutting Machine and Stacking Rack: The cutting machine requires high precision and reliability. The stacking rack should be equipped with a protective layer to prevent scratches on the sheet surface.