Qingdao Tongsan Plastic Machinery Co.,Ltd 

    Professional manufacturer for plastic corrugated pipe machine since 1997         

    Whatsapp/Wechat:008613969891023      Email: sales@tongsanextruder.com

The COD pipe process: there are two production lines

Straight pipe making machine (inner pipe in COD pipes ) 

single screw extruder--- die unit--mould--vacuum and cooling tank--hauling off device --- coiling device 

feed straight pipe to spiral pipe

straight pipe putting device--- extruder(for spiral pipe)--die--mould--vacuum sizing device --- hauling off device --- final COD pipe winder

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COD pipe machine

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