Hydraulic hose extrusion process common quality problems and cause analysis

Hose tube embryo extrusion process, the quality of the more common problems are: tube embryo size does not comply, the wall thickness uneven , uneven thickness, layer rupture, blistering or appear sponge layer phenomenon tube embryo adhesion and so on. Produce these causes of quality problems are more factors affecting more also, are itemized as follows:An embryo size does not meet the standard requirements , the wall of uneven thickness : core typeandmouthoptionalimproperly masticated rubber mixing and poor , resulting compound plasticizersdegree inconsistent ; core type and mouth eccentric or election with properly, uneven temperature thermal refining rubber ,Hydraulic hose fittings  plasticizing screw extruder working poor performance , are likely to cause such problems.Two embryos uneven thickness : plastic material plasticity inconsistent, uneven temperature thermal refining , feeding speed unsteadiness , extrusion speed and traction speed mismatch can cause embryo extruded tube diameter uneven thickness phenomenon.3 layer rupture : plastic material with a mixture of micelles , durum and other impurities , or produce local self- sulfur compounds , may cause layer rupture.4 blistering or appear sponge layer phenomenon: the rubber compound too muchmoisture or low molecular weight volatiles , rubber refining or feed mixed with hot air , extruder temperature is too high , causing the extruder screw wear serious lack of thrust , extruder head pressure is insufficient , etc., can cause blistering or sponge layer phenomenon .5 embryo adhesion : the cooling tube embryo is not enough, the release agent is poor, extruded tube embryo squeeze too tight, parked too long , can cause tube embryo adhesion phenomenon.