Research status of melt conveyor in Squeeze Casting

In the early application of squeeze casting technology, the transportation of molten metal is basically manual transportation and mold filling. The workers have high labor intensity and low production efficiency. The high temperature molten metal in the process of mold filling is easy to oxidize, which affects the properties of castings. At the same time, in the process of squeeze casting, the pressure of punch will extrude the excess molten metal out of the mold cavity. If the amount of molten liquid filled is too much, it will cause splashing, which will cause safety hazards. With the development of industrial level, automatic conveying systems such as manipulator conveying system, electromagnetic pump molten liquid conveying system, electromagnetic pump molten liquid conveying system and air pressure molten liquid conveying system have been gradually used.

According to the theory of production system design, the production logistics of squeeze casting equipment can be described by the production logistics system, which is composed of melt conveying system, mold filling system, picking system and other subsystems, corresponding to the process of material transfer such as melt conveying, injection and picking. With the development of automation technology, the development of take-off system at home and abroad has been very mature. Various types of take-off devices and control systems emerge in endlessly. However, there is still considerable room for the development of melt conveying system and mold filling system, especially for the special process requirements of large-scale parts squeeze casting, and the requirements of melt conveying system for castings Quality and production efficiency have great influence on efficiency.

A new method of squeeze casting logistics simulation using Flexsim, which is a simulation software in the field of logistics, is proposed. The method of simulation of indirect squeeze casting process is also proposed, and the general indirect squeeze casting process is simulated. In the simulation, it is found that the production logistics system in the squeeze casting equipment operates normally, but the utilization rate of various auxiliary devices such as the filling hand and the pick-up hand is very low, which not only has reference value for the further optimization of the equipment, but also can provide a reference for the production logistics simulation of the large-scale parts composite squeeze casting system. In this paper, it is very important to develop a melt conveying system which can meet the technological requirements for the compound squeeze casting method of large-scale parts. The establishment of the system model for the logistics simulation of the production logistics system can optimize the design and shorten the equipment development cycle.