8die casting

1、DIE CASTINGSand casting is suitable for large components and for metals that melt at high temperatures.Sand casting 什么情况下使用砂型铸造什么情况下使用砂型铸造For low melting temperature metalsDIE CASTING Examples:door handles 门把手门把手； transmission cases 齿轮箱，传动箱齿轮箱，传动箱；Carburetor 汽化器汽化器, 化油器化油器.home appliances (e.g rice

2、cookers, stoves, fridges)Vocabulary词汇词汇die casting 压力铸造，造压模铸造压力铸造，造压模铸造Die 模，压铸模模，压铸模 die castings 压铸件压铸件 casting die 铸造模铸造模die-casting mould 压铸模压铸模die cavity 模腔模腔 mold cavity 型腔型腔parting line 分型面，分型面，分模线分模线Ladle 浇包浇包shot/injection 压射压射 The act of injecting shot chamber 注射室注射室 injection piston/plung

3、er 压射冲头压射冲头die casting machine 压铸机压铸机 die casting furnace 保温炉保温炉 holding furnace 保温炉保温炉alloy 合金合金 Magnesium 镁镁 low pressure (die) casting 低压铸造低压铸造 hot chamber die casting 热室压铸热室压铸, 热箱压铸热箱压铸 hot-chamber die casting machine 热室压铸机热室压铸机 cold-chamber die casting 冷压铸造冷压铸造 cold chamber die-casting machine

4、冷室压铸机冷室压铸机 shot sleeve 压铸储筒压铸储筒Vocabulary-词汇词汇Die-casting 压铸压铸 Die casting is a manufacturing process in which molten metal is injected, under pressure, into a hardened steel die or also called mold. Die-casting 压铸压铸 Die casting molds are expensive, and require significant lead time to fabricate. On

5、ce the tooling is paid for, die casting is a very inexpensive aluminum part manufacturing process (many times thousands of parts each day, sometimes only a few hundred). What is casting 铸造铸造?Casting is a process of pouring molten (liquid) metal into a mold to form a part. What is forging 锻造锻造? forgi

6、ng is shaped the metal by press from the hammer 锻锤锻锤 or press machine 压床压床. How is metal casting done? Metal casting can be done through sand casting ,investment casting , pressure die casting methods What are the materials for die casting mold? die casting mold is made from steel (hard material), t

7、ool steel, carbone steel.CNC：数控机床 EDM machine tool: 电火花机床 Which machining processes are used to fabricate the die casting mold? Dies are usually made from two blocks of steel 钢板钢板, each containing part of the cavity腔腔. Why Dies are made from two blocks of steel ?What is meant by two mold casting? Th

8、ere are two molds that you put together to make the casting, so the part is easier to get out of the mold. The two blocks of dies are locked together while the casting is being made. Two blocks of steel, one-half of the die (next to the ejector nozzle) is stationary (the fixed die half), the other h

9、alf moves on a carriage (the ejector die half), to permit removal of castings. The two methods are hot chamber 热室压铸热室压铸 or cold chamber 冷压铸造冷压铸造How many methods are used for die casting?what difference?The fundamental difference in die casting machines is the method used to inject molten metal into

10、a die. The two methods are hot chamber 热室压铸热室压铸 or cold chamber 冷压铸造冷压铸造 (what difference?)Cold chamber machine - A type of die casting machine in which the metal injection mechanism is not submerged (在水中的在水中的) in molten metal. Hot chamber machine - Die casting machines which have the plunger 活塞活塞,

11、gooseneck (metal pressure chamber) immersed in molten metal in the holding furnace. Submerged: To place under water Immersed: To cover completely in a liquid; submerge. What are the materials for Hot chamber machines? What are the materials for Cold chamber machines? Hot chamber machines are used pr

12、imarily for zinc锌锌, copper 铜铜, magnesium 镁镁, lead 铅铅and other low melting point alloys that do not readily (容易容易) attack and erode metal pots, cylinders and plungers. Cold chamber machines are used for alloys such as aluminum and other alloys with high melting points. DIE CAVITY The impression （印模）i

13、n a die into which pattern material is forced. Cavity - impressions in a die in which the casting is formed.LADLE - 杓子杓子, 長柄杓長柄杓 long spoon with a deep bowl for serving liquids. used for transporting and pouring molten metal.EJECTOR PINS 推杆- A pin is used to force the casting out of the die cavity.

14、Injection/Shot 压射压射- The processes of forcing molten metal into a die. Parting line 分型面分型面 - The line along which a die is separated. Surface where the die halves meet. Plunger 压射冲头压射冲头- Ram or piston which forces molten metal into a die. Cold chamber Die casting processCold chamber machines are use

15、d when the casting alloy cannot be used in hot-chamber machines; these alloys include aluminum, magnesium （镁）镁）, , copper（铜）（铜）, and zinc alloys（锌）（锌）Cold chamber Die casting processThis machine works by melting the material, first, in a separate furnace. Cold chamber Die casting processThen a preci

16、se amount of molten metal is transported to the cold-chamber machine where it is fed into an unheated shot chamber (or injection cylinder). The mould is closed and sealed （密封的）（密封的）. The plunger is in the upper position 柱塞在上面的位置柱塞在上面的位置The molten metal is poured 浇注浇注 into a cold chamber, or cylindri

17、cal sleeve, manually by a hand ladle or by an automatic ladle. Then the plunger seals the cold chamber port （关闭）and forces (push) metal into the locked die at high pressures. The product is removed from the mould by moving side ejectors. The cold chamber die casting process is similar to the hot cha

18、mber process, until the die is melted and platened into machine and melted metal is forced under high pressure into the die. The primary differences in cold chamber process are that the molten metal is ladled automatically or by hand from holding furnace and deposited into a shot sleeve which is col

19、d. Once the metal is deposited into the shot sleeve, a piston under very high pressure forced the metal into the die casting die. The cold chamber process is used to produce product using zinc aluminum, aluminum magnesium and brace alloy Video cold chamber die casting Hot chamber Die casting process

20、The injection mechanism of a hot chamber machine is immersed in the molten metal bath of a metal holding furnace. The furnace is attached（连接连接）to the machine by a metal feed system called a gooseneck. Metal feed system：送料系统送料系统Gooseneck： something in a thin curved form (like the neck of a goose)。White goose 鹅 As the injection cylinder plunger rises, a port in the injection cylinder opens, allowing molten metal to fill the cylinder. die is closedcylinder is filled with molten metalport is opensAs the plunger moves downward it seals the port and forces (pushes) molten metal through the goose