Glass mat diameter is generally smaller

Glass mat diameter is generally smaller than the diameter of the extruder barrel 3 ~ 5mm. b glass lubricants, chemical stability, without causing tissue defects. b often cause environmental pollution. Glass mat bore diameter of less than or equal to the diameter of the die hole. Inadequate pickling lies in aggressive various steel materials is large, it may make steel pickling surface, especially the larger and erosion of carbon steel, and therefore subject to restrictions on use.(3) removing the steel surface glass film: As the use of glass lubricant during extrusion, extrusion residual glass film on the inner and outer surfaces of carbon steel pipe with a thickness of 20 ~ 50μm, which is hard and brittle nature, detrimental to subsequent processing and use It must be removed. a prone products Carbon, when squeezed prone to intergranular corrosion of stainless steel, it is necessary to remove the carburized layer after extrusion, resulting in increased metal consumption. a has good lubricating properties, can be large extrusion ratio and increase extrusion speed, which can expand the range of products the extruder.), in order to adapt the extrusion of different materials required.(1) extrusion die lubrication: mold lubrication method commonly pressed into the glass frit glass mat, i. PH joint clearance method currently used.The disadvantage of graphite lubricant are: ` large thermal conductivity, poor insulation, mold temperature rise of large, fast-wear, long product extrusion difficult.

Compared with glass graphite lubricant, its advantages are: ` glass thermal conductivity, to prevent excessive cooling the billet surface, but also can play a protective role tooling. Applied Chemistry Law Clearing glass membrane, since the pipe surface residual glass lubricant has a high chemical stability, it needs to remove alkali solution or an acid solution. d can be kept clean when glass is used as a lubricant. In addition, you can also use glass cloth wrapped around wrapped in the billet surface and the glass cloth wound around the hot forging steel Company mandrel method.. Mechanical methods have shot, water and stretch straightening methods. 

Thickness of the glass mat generally take 4% to 8% of the length of the blank. In order to ensure continuous glass mat to soften the friction surface, the desired shape and mold hole inlet cone and the shape of the glass mat blank ends coincide.(2) extrusion cylinder and the mandrel lubrication: extruded tube and the mandrel lubrication should be used in a low softening point, the small size of the glass powder is applied to the hole and the outer surface of the slab. Clear methods include mechanical and chemical methods.Extrusion steel parts must be lubricated are: extrusion molding, extrusion mandrel tube and three parts. before pressing the glass mat is placed between the mold and the billet.e. In short, glass lubricants significant advantages