Extrusion Mould How to Prevent Tissue Stripe Defects

The correct design, careful processing, reasonable mold repair and timely nitriding of the extrusion die are the key measures to prevent the stripe defect.

a. The correct design of the extrusion die, reasonable layout of the shunt hole, a reasonable determination of the length of the working band, and the transition of its length change, the shape of the bridge drop, a reasonable welding angle, so that the welding point falls on the plane of the welding chamber, To ensure the rigidity and strength of the die core, deepen the depth of the welding chamber or expand the cross-sectional area of ​​the welding chamber. If necessary, use the "Sink Bridge", which is the basic measure to prevent the stripe defects.

b. The mold should be processed strictly in accordance with the requirements of the drawings. In particular, attention should be paid to improving the surface luminosity of the divergent hole and the dripping of the mold bridge to improve the flow state of the solid metal and reduce the frictional heat.

c. For the extrusion of the mold that produces the stripe of the tissue, the mold repairer should go to the site to understand the mold discharge conditions and determine the correct mold repair plan; the mold repairer personally observes the state of the profile discharging at the moment than the observation of the profile discharge head It is much better to determine the repair program.

d. Extrusion dies are nitrided in time as required to ensure a reasonable flow of solid metal.