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Hot chamber die casting

Hot chamber die casting is one of the two main techniques in the manufacturing process of die casting.This section will primarily discuss the specific details of the hot chamber process and contrast the differences between hot chamber die branch of die casting manufacture.

Hot chamber process
A similar characteristic of either die casting process is the use of high pressure to force molten metal through a mold called a die.Many of the superior qualities of castings manufactured by die casting,(such as great surface detail ),can be attributed to the use of pressure to ensure the flow of metal through the die.In hot chamber die casting manufacture the supply of molten metal is attached to the die casting machine and is an integral part of the casting apparatus for this manufacturing operation.

The shot cylinder provides the power for the injection stroke.It is located above the supply of molten metal.the plunger rod goes from the shot cylinder down to the plunger,which is in contact with the molten material.At the start of a casting cycle the plunger is at the top of a chamber (the hot-chamber ).Intake ports allow this chamber to fill with liquid metal.

As the cycle begins the power cylinder forces the plunger downward .The plunger travels past the ports cutting off the flow of liquid metal to the hot chamber .Now there should be the correct amount of molten material in the chamber for the “shot” that will be used to fill the mold and produce the casting .

At this point the plunger travels further downward forcing the molten metal into the die .The pressure exerted on the liquid metal to fill the die in hot chamber die casting manufacture usually varies from about 700psi to 5000psi (5MPa to 35MPa ).The pressure is held long enough for the casting to solidify.

In preparation for the next cycle of casting manufacture the plunger travels back upward in the hot chamber exposing the intake ports again and allowing the chamber to refill with molten material.

For more extensive details on the setup of the mold ,the die casting process ,or the properties and consideration of manufacturing by die casting see die casting for the basics of the process.

Hot chamber die casting has the advantage of a very high rate of productivity .During industrial manufacture by this process one of the disadvantages is that the setup requires that critical parts of the mechanical apparatus,(such as the plunger),must be continuously submersed in molten material.Continuous submersion in a high enough temperature material will cause thermal related damage to these components rendering them inoperative.For this reason usually only lower melting point alloys of lead,tin,and zinc are used to manufacture castings with the hot chamber die casting process.

Answer 1

热室压铸
热室压铸是在压铸生产过程中的主要技术。本节将主要讨论具体细节的热室压铸生产工艺与热室压铸分支之间的差异。
热室的过程
无论是压铸工艺相似的特点是高压力迫使熔融金属通过模具称为模具的使用。许多通过压铸生产铸件的高质量，（如大的表面细节），可以归因于压力，通过模具使金属流动中使用。热室压铸生产供应金属熔附于压铸机是制造操作的铸造设备的一个组成部分。
镜头筒注射行程提供动力。它位于熔metal.the柱塞杆的供应从枪筒下柱塞，这与熔融物接触。在铸造循环柱塞在室的顶部开始（热室）摄入。端口允许本室充满液态金属。
当周期开始的动力缸推动活塞向下。柱塞在港口切断金属液流动的热室。现在应该在室正确的熔融材料金额为“镜头”，将用于填充模具生产的铸件。
在这一点上，柱塞旅行进一步向下迫使熔融金属模具。压力施加在金属液填充模具热室压铸制造通常从700psi到5000psi（5MPa～35MPa）。压力保持足够长的铸件凝固。
在铸造生产的柱塞向上穿越回热室露出进气口又使腔室填充有熔融物的下一个周期的制备。
对于更广泛的细节在模具的安装，压铸工艺，或性能的压铸模具制造考虑看到的基本过程铸造。
热室压铸具有很高的生产率优势。工业生产过程的一个缺点是：在安装需要的关键部分的机械装置，（如柱塞），必须不断浸入熔融的材料。在足够高的温度，将这些材料连续淹水元器件绘制它们失效导致热损伤有关。由于这个原因，通常只有低熔点铅，锡点合金，锌用于制造与热室压铸过程铸件。追问

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