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B.O.B. problem in extrusion processing The vast majority of the “ Billet on Billet “ or “ Blok on Blok, “ ( B .O.B. for short ) problems are from the welding seam lines in the hollow profiles and the ends of the profile for very wide flat dies that use a spreader plate to provide sufficient feed to
TONGUE RATIO CALCULATION IN EXTRUSION DIE DESIGNThis calculation will supply a value in the form of a ratio between the opening (or neck) ofa tongue detail to the total surface area of the tongue itself. The calculation will supply anindication as to the strength of any such tongue and the likelihoo
Die blocking due to operating factorsThe operation factors lead to the blockage of the die, and how to reduce or avoid the blockage of the die in the operation to obtain the correct specific die profile information and material head (tail) and samples as soon as possible, for the correction of quali
Die Block Caused by Relief DesignThe working belt without support is easy to deform and crack when the relief is too large. Profile in the export stage of the material head out of the working belt due to the flow speed, wall thickness, resistance and other reasons, not necessarily radial outflow, m
Die Blocked Caused by Flow DifferencesIt’s common to see in complicated profiles die and dies with long cantilever .1) The main performance is the design deviation of aluminum flow ratio, the size of the chamber, the length of the local working zone, and the obstruction of the direction of aluminum
Five factors affect the extrusion of industrial aluminum profilesAs we all know, industrial aluminum profile is a kind of alloy material with aluminum as the main component, aluminum bar after hot melting, extrusion to obtain different cross-section shape of aluminum material, but because of the dif
How to Produce the Industrial Aluminum Profile Surface Without Any Extrusion Mark?We can usually see a lot of scratches on the surface of aluminum profiles, scratches are common surface defects in the process of industrial aluminum extrusion. If the scratch is on the inside, it may be a foreign body
The Flow Characteristics of a DieHow the Aluminium flows within a die is of great importance. The flow will not be straightthrough any die because of the effects of drag / friction within the die and this will have theeffect of distorting the flow. How much distortion to the flow has a direct relati
Profile shape problemsAngle or square-ness of a profile is one of the most common defects encountered inextruded profiles. The problems are directly related to an imbalance in the flow or feed topart of the profile within the die itself. This may be from the bearings or flow relatedfactors, for exam
Welding Processing in Die CorrectionIf the velocities between the outside of the profile and the central portion are close tobeing equal and the pressure within the die is great enough then a eutectic weld between consecutive billets will be achieved. The outer friction, as already discussed, is gen
Brief introduction of deformed Aluminum alloy1.1 Classification of deformed aluminum alloyAluminum alloy root its chemical composition of the production process characteristics of different, can be divided into casting aluminum alloy and deformation aluminum alloy. Deformed aluminum alloy has high
Porthole Die Stress checking.This is a quick and simple method used to check if a given die design has sufficientstrength and the likelihood of failure of the die during the die’s life time. This system isbased on the calculation that is used by the Die-maker and has been adjusted to a tableform. Th
Why Dies Perform DifferentlyIt has long been a mystery as to why some dies turn out to be a major problem for theTechnician and the Production team. These particular dies can be to produce a relativelysimple profile but can be the cause of many discussions and possibly heated exchangesbetween Techni
WHY WEB (BRIDGE) GET CRACKED EXTRUSION DIEAfter several production runs the mandrel will begin to deflect with the resultingcracks appearing on the weakest part of the webs ( maybe noticeable more quickly ondies with a high extrusion ratio ). The cracks if left unattended will worsen and in severeca
How to improve extrusion die lifeThere are many factors that can affect industrial aluminum extrusion die life of, in addition to the extrusion die structure design and strength, mould materials, hot and cold processing and electrical processing technology, heat treatment and surface treatment techn
Detailed explanation of production steps of industrial aluminum profileTo produce aluminum extrusions, we must use aluminum extrusion production line equipment, a complete set of aluminum extrusion production line equipment a total of 6 parts: aluminum extrusion machine, billet cutting hot furnace,
Factors that should be considered in extrusion die design1 In accordance with the structure of the aluminum extrusion machine, die designers must consider aluminum products surface, the choices of the press machine, the customer product requirements, service condition , the complexity of the produ
Principles and steps of aluminum extrusion die designDetermine design cavity parametersFirst of all, designers get the section drawings, the first is to determine the machine, according to the extrusion ratio, section section of the maximum circumfluence is how much, and complexity to decide which m
Structure of Aluminum Extrusion DieAluminum extrusion die is made of H13 steel.The die can be used after nitriding.The whole die is composed of three parts: die feeder, die plate and backer. Now let’s focus on the structure of normal dies.1. Working beltThe working belt is perpendicular to the worki
Process Flow
