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introduction：Plastic injection molds are basically divided into static molds and dynamic molds。 The one with gate cover on one side of the injection head of the injection molding machine is a static die，Static molds usually have gate covers、Backup plate、Template composition，Simple mold（Especially die without core）You can also not use the board，Just use a thicker template。Gate covers are generally standard parts，Except for special reasons，Cancellation not recommended。The use of gate covers is conducive to mold installation、Easy to replace，No need to polish yourself。Some special mold gate sleeves can be drilled out or cut with taper line。Part of the die must be static when the die is removed，We need to add a dead die ejector。The structure of a moving die is generally a moving die
2015-02-03 Reading quantity 2796
introduction： compre sion moldingCompression forming flash moldOverflow mold plsitive moldExtrusion die split moldSplit die cavitytype-control Master die coreDie core Male die tapertaper leather cloakImitation leather shiverornamentation flow markRill mark welding markSolder mark post scre
2015-02-03 Reading quantity 2827
introduction：Basic introduction The reducer is an independent closed transmission device between the prime mover and the working machine，Used to reduce speed and increase torque，To meet the needs of the job，In some cases also used to speed up，speeder。 The selection of the reducer should be based on the selection conditions of the working machine，Technical parameter，The performance of the engine，Economic and other factors，Compare different types、Variety reducer dimensions，Transmission efficiency，Carrying capacity，Quality，Price etc，Select the most suitable reducer。 The reducer is a relatively precise machine，The purpose of using it is to reduce the speed，Increase torque。 Edit the basic structure of this paragraph
2015-02-03 Reading quantity 2823
introduction：air permeability test Air permeability test austenitic steel Wastin Steel brinell hardness Bunnell hardness brinell hardness test Brinell hardness test charpy impact test Charpy impact test conical cup test Conical cup test cup flow test Cup model flow test dart drop impact
2015-02-03 Reading quantity 2926
introduction： POM polyformaldehyde Chemical and physical properties POMIt is a tough and elastic material，It has good creep resistance even at low temperatures、Geometric stability and impact resistance。POMThere are both homopolymer materials and copolymer materials。The homopolymer material has good tensile strength、Fatigue strength，But not easy to process。Copolymer materials have good thermal stability、Chemically stable and easy to process。Whether homopolymer material or copolymer material，Are crystalline materials and do not absorb moisture easily。 POMThe high degree of crystallization results in it having quite
2015-02-03 Reading quantity 2886
introduction：Domestic reducer industry manufacturers also coexist in various forms，Such as foreign-funded enterprises、Sino-foreign joint venture、State-owned enterprise、Joint-stock enterprises and individual enterprises，The scale has reached billions of yuan of annual output value，As small as a few million dollars。Foreign companies account for about a quarter of those sales。 In the manufacturing of reducer，At present, the number of domestic manufacturers is large，Such as Chongqing gearbox Co., LTD，Hangzhou forward gear box Co., LTD，Nanjing high precision gear Co., LTD，Xi an Heavy Machinery Research Institute，Luoyang heavy gear box Co., LTD，Jingzhou whale transmission machinery Co., Ltd. and other domestic mainstream brands，countries
2015-02-03 Reading quantity 2803
introduction：A detachable connection consisting of two elastic rings fitted with internal and external cones squeezed between the shaft and the hole（See picture[The structure of elastic ring connection]）。The cone Angle of the elastic ring is generally12.5°～17°。Tighten the nut to tighten the inner and outer rings，shaft、Radial pressure is generated between the hole and the ring，When working, torque and axial force are transmitted by the accompanying friction。Elastic rings are generally used、Made of high carbon or chromium steel，Required surface finish and good fit。When the centering accuracy of the connection is required to be very high，Use the whole ring。High bearing capacity of elastic ring connection,No source of stress concentration，Good concentration，Easy to assemble and disassemble,Theres enough tightness，Over duty
2015-02-03 Reading quantity 2808
introduction：Background information Chinas largest steel mill——Anshan Iron and Steel Company in Liaoning province，To optimize the plant“Overall equipment efficiency”（OEE），A series of upgrades have been introduced。As a fully integrated plant for the production of flat plates and long strips of steel，Angangs upgrades include the construction of a single-channel steel plate casting facility、A four-way billet continuous casting facility、An ingot refining furnace、In addition, three existing basic oxygen furnaces with a production capacity of 90 tons in Anshan No. 1 Rolling Mill are also available（BOF）The vacuum exhaust system。 The new sheet steel casting facility has a designed annual production capacity of one million tons，And billet casting
2015-02-03 Reading quantity 2800
introduction： General injection mold design procedure Preparation before design The designer of the mold should design the mold according to the design specification，The mold design task is usually proposed by the plastic product production department，The task book includes the following contents： (1)Approved formal plastic drawing，And indicate the plastic brand used、Transparency etc，If the plastic part drawing is based on the sample mapping，It would be better to attach a sample，Because the sample is more graphic and intuitive than the drawing，It can also give the mold designer a lot of valuable information，Such as the gate location used in the sample、Ejector position、Parting surface, etc。 (2)Plastic parts specification
2015-02-03 Reading quantity 2904
introduction：Welding is done by heating、pressurization，Or both，A processing process and connection method that produces an interatomic bond between two workpieces。Welding is widely used，Can be used for both metals，It can also be used for non-metals。 Development history of welding technology Welding technology emerged with the application of metals，The ancient welding method is mainly cast welding、Brazing and forging。A bronze spear made in the Shang Dynasty of China，Its a cast welding of iron and copper，The surface copper and iron fusion line is winding，Fit well。During the Spring and Autumn period and the Warring States period, there were many coeldragons on the bronze seat of Jianguu in the tomb of Marquis Yi of Zeng，It is brazed in sections。analytically，Make use of
2015-02-03 Reading quantity 2828
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