-- the application of respect of horn net mould to die manufacturer, horn net mould is a difficult problem probably. Because the structure is concentrated,this is, the surface with first-rate at the same time requirement is bright and clean degree, when noting model so plastic a gift is OK and great land drawing of patterns. Normally, as a result of position of the alveolus of thousands of, union and petty reinforcement, mould cannot polishing. Cause, needs surface is bright and clean degree need through report treatment is finished. If need to undertake typical 4u-6u Rmax surface is machined, such ability can assure to be when drawing of patterns, avoid plastic a sticking to mould. To so careful surface treatment is completed in discharge treatment process, electrode must use the black lead that has even microstructure and small particle size. Because mould antrum is the mirror of electrode, and final plastic it is model the mirror of antrum, accordingly to obtain best plastic, choose best black lead very necessary. Horn net mould has the aperture of thousands of and petty anything resembling a tendon or vein respectively, craft demand is extremely accordingly high. Make the discharge treatment of the mould from electrode, need high strenth and careful grain black lead, the particle size of black lead is in on average 1-5 micron. Black lead grade is very much, the physical property that because this chooses right black lead,needs to understand black lead above all reachs these physical attribute the influence to the process is being machined in report, impact that makes to black lead electrode. Those who choose proper black lead order and degree to cannot pass manual polish is small-sized and careful model the surface that antrum needs to finish place to need by right of electric treatment is bright and clean degree, the choice because of grade of this black lead must can satisfy afore-mentioned requirements. Usually, exceed thin black lead to be able to be competent. The content reason that when choosing proper black lead, needs to understand black lead is simple. Of the property of black lead and characteristic black lead classification it is a basis with particle size. Average size is less than the grain that exceeds thin black lead 5 micron. In exceeding fine grade black lead, physical attribute and microstructure also have very big difference. Normally, the black lead ability of high strenth, small particle size and even microstructure accomplishs the mould of clarity of expensive measure precision, careful place, what can note model to give fast face quality is plastic. Even microstructure is made in electrode or report machines a process in, each function with respect to black lead, the most important is even microstructure, hole and particle distributing equably. The black lead of high quality has even microstructure, the structure between every black lead is consistent, and classics year keep consistent. And in-house and random law is scattered have the performance that cannot expect with the black lead that has the appearance that accumulate a group. The result that can expect is very necessary, especially the mould of longer to need production time and cost, for example, to dimension, public errand the demand perhaps needs report higher to machine the surface (chemistry of and rather than or manual polish) mould. Hardness and intensity make to electrode for have two main factors: Shore hardness limits (70-80) and bending strength (> 13, 000 Psi) . The material that is in afore-mentioned hardness limits is OK good and orderly margin is made in the coping of the aperture of thousands of. Be more than the material of 80 to Shore hardness for, the feed of machine treatment and rotate speed want some lower. Hardness of material of little grain graphite is too big, in machine treatment process classics regular meeting is in brim place to burst apart, go against electrode to make so. It is big to grinding for cutting tool, make cutting tool wears away easily, such meetings affect the consistency of aperture diameter. The high wear rate of cutting tool and collapse horn will raise finished cost. Too soft black lead can bring an issue likewise, they will be clingy the chamfer discharging bits of cutting tool, make machine treatment speed slows, perhaps bring about dust to jam aperture, oppress hole wall produces drawing stamp then. If the bending strength of graphite material is more than 13, 000psi, so this material becomes the muscle that exceeds fine exceeding operational depth in treatment can avoid to rupture when electrode. As a result of the craft with these electrode meticulous requirements, because this electrode needs to be made for long, and come from the angle of cost look, electrode amount is jumped over lesser economical. Exceed fine grade black lead with what provide at horn wire mould electrode and plastic a finished product. Electrode machines the electrode loss in the process to not allow to ignore in report, because high loss means electrode need often nap in order to finish careful place. Additional, can bring about from inside fallen grain is taken off to fall into discharge clearance on electrode model antrum occurrence stain lengthened report handling time. Too big electrode is drossy the meeting in dropping discharge clearance brings about a machine tool to carry from adaptive control the space that the knife comes and increases electrode and mould, or rise carry knife frequency will clear in discharge clearance big grain. In this kind of application, because cannot pour oil, accordingly ought to will drossy reduce as far as possible. In discharge process, melt the metal is cast to be shot by explosion, this brim loss electrode. Low intensity and the black lead that have inattentive microstructure cannot keep out this kind to bump and make big grain ceaseless also in falling into clearance. And the black lead that has even microstructure and small particle size can reduce this kind of loss. Electrode loss is accordingly accurate to producing tolerancepublic errand model antrum also is indispensible. Electrode contrail treatment can help strong oil clear discharge clearance raises the surface to machine quality. Muscle material of graphite of the requirement when electrode undertakes orbit is machined must have high strength, when such ability can avoid muscle material to be machined in electrode contrail, appear rupture; This also can affect the quality that machines to the surface, in aperture and muscle interior is weighed particularly should, hand-in-hand and the influence is plastic drawing of patterns. Use material of high quality graphite to undertake model the careful place of antrum and exterior treatment can make plastic break away from smoothly from the mould, increase productivity and profit thereby. The enlarge of electrode of high quality black lead pursues. The black lead of enlarge graph new grade of electrode of high quality black lead improves treatment to increase level of thin black lead of unfavorable balance of trade as new material as a result, the member that report machines a person discovers the result gets ameliorative. What be worth to be carried here is a kind of special black lead grade, EDM-4, its advantage is as follows: Average size is less than ◆ grain 4 micron, can be engaged in fine face is machined and loss is small. Bending strength raises ◆ to be more than 15, 000 Psi, be helpful for muscle treatment. ◆ finishs the ideal hardness range that electrode makes easily. It is very important that these attributes have careful treatment to electrode. Lead to maintain good metallic cutting at the same time, these property that hold electrode are very principal also. The black lead that makes appliance has these physical quality can reduce electrode loss (amount to 10% ) improve the appearance bright and clean degree (amount to 5% ) . Bending strength increases this grade black lead of 15% petty to making muscle first-rate choice also is for electrode. Result: Taller to the requirement application domain, if horn wire mould is provided, the physical nature that understands different grade when choosing black lead grade is right the effect of treatment antrum is very main. Choose best black lead to be able to produce a high quality model antrum. Model the mirror that the exterior treatment of antrum is electrode microstructure, the order and degree with accordingly best choice is very significant. When model antrum is finished and production gives the first plastic hind, as a result of model of antrum inhomogenous the problem of sticking to mould that create is meant model antrum needs do poorly done work over again or adjust. Although choose the cost of high grade black lead taller, but be in make and the valence watch that function of advanced course black lead brings in electric treatment process is commendable. When Selecting A Graphite Grade For Demanding Applications Such As Speaker Molds, understanding How The Physical Property Values Affect The Finished Cavities Is Important. Selecting The Best Graphite For The Job Will Produce A Quality Cavity.
The black lead that knows you use? It is very important that the choice of black lead is finished to what work every. Must know the characteristic of different brand and grade black lead and physical property. According to grade different, can divide roughly it is 4 kinds. Be in these 4 kinds only in, ability achieves the result that you expect. When choosing black lead, need is careful. You need to know to produce business and character its formerly. The black lead of same brand produces change possibly also as the elapse of time, cause the consequence that cannot predict possibly. Use high quality black lead to be able to reduce manufacturing cost truly. In fact, black lead electrode held very small one share only in cost of whole pattern production. Best black lead is fought as a result of its wear away capability is high, need to use fewer electrode to be able to machine your satisfaction only so model antrum. Loss is small, also mean in successive discharge process, fewer black lead produces in clearance lieutenant general drossy. Additional, the common black lead with high quality coarser than small structure black lead is more active in discharge treatment process effective. In the meantime, model the precision of antrum also rose. Use to electrode of another black lead continuously from electrode of a black lead in, we can foreknow the process of finish machining. CNC Milling
CNC Machining