Crucible molding machine

Abstract

The invention provides a crucible molding machine, relating to a press machine using a press head. The crucible molding machine is provided with a vacuum pump, a hydraulic cylinder, a control system, a trolley walking oil cylinder, an internal mold lifting frame, an internal mold oil cylinder, a movable bracket, an eccentric shaft, an upper press head, an upper press head lifting frame, a frame, an internal mold, an external mold, a vibrating platform and a stand; the trolley walking oil cylinder is arranged at the bottom of the internal mold lifting frame; the internal mold lifting frame andthe internal mold oil cylinder are arranged at the bottom of the internal mold; the internal mold oil cylinder is arranged on the movable bracket; the movable bracket is connected with the internal mold lifting frame; the eccentric shaft is arranged on the vibrating platform; the upper press head lifting frame is arranged at the upper part of the upper press head; a vibration source is connected with the eccentric shaft; the middle part of the external mold is connected with the vibrating platform; the internal mold is connected with the external mold by a lock; the vibrating platform is arranged on a rubber spring of the stand; and the upper press head is connected with the external mold by rotating teeth. The crucible molding machine provided by the invention can be manually or automatically controlled so that good overall performance of the crucible is achieved. The density of the product is 1.73 g / cm<3>, the density difference of the parts is less than 0.03 g / cm<3> and the standard rate reaches more than 95%.

Description

technical field [0001] The invention relates to a press machine using a pressure head, in particular to a crucible forming machine. Background technique [0002] Artificial graphite crucible has the characteristics of high temperature resistance, oxidation resistance, and low ash content. It is widely used in high-purity metal smelting. It can be used not only as a heating element, but also as a container, and has less pollution to metals. [0003] The existing graphite crucible production mainly adopts the processing method of mechanical turning, and the processing process is: select the graphite electrode, and process and cut it on a common lathe. For example, to process a graphite crucible with a diameter of 500mm×800mm, you can first take a section of graphite electrode with a diameter of 530mm×900mm, process its outer diameter to 500mm on a lathe, and then machine the inner hole from one end with a wall thickness of 50mm and a depth of about 750mm. 50mm; then flatten t...

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