2022.11.16
Pressure lost foam casting skills
Pressure lost foam casting technology is a new casting technology combining lost foam casting technology and pressure condensation crystallization technology. It is to pour metal liquid into a pressure tank with a sand box to make the foam plastic evaporate and disappear, then quickly seal the pressure tank, and A casting method in which the gas of a certain pressure is fed into the foam machine to make the molten metal condense and crystallize under pressure. The characteristic of this casting technology is that it can significantly reduce casting defects such as shrinkage cavity, shrinkage porosity, and pores in castings, improve the density of castings, and improve the mechanical properties of castings.
Vacuum low pressure lost foam casting skills
Vacuum low-pressure lost foam casting technology is a new casting technology developed by combining negative pressure lost foam casting method and low-pressure anti-gravity casting method. The characteristics of vacuum low-pressure lost foam casting technology are: the technical advantages of low-pressure casting and vacuum lost foam casting are combined, and the filling process is completed under the air pressure that can be controlled by lost foam machinery, which greatly improves the casting filling ability of alloys; compared with die casting , small investment in equipment, low cost of castings, castings can be strengthened by heat treatment; compared with sand casting, castings have high precision, small surface roughness, high productivity, and good performance; The loss of pouring temperature is small, and the liquid alloy is fed and solidified under controllable pressure. The pouring system of alloy castings is simple and effective, with high yield and compact structure; the pouring temperature of vacuum low-pressure lost foam casting is low, which is suitable for various non-ferrous alloys .
Oscillatory lost foam casting skills
Oscillatory lost foam casting technology is to apply vibration of a certain frequency and amplitude during the lost foam casting process, so that the castings solidify under the effect of the vibration field, because the metal solution is oscillated for a certain period of time during the solidification process of the lost foam casting, and the vibration force makes the liquid The relative movement between the phase and the solid phase breaks the dendrites, increases the crystallization centers in the liquid phase, refines the final solidification structure of the casting, improves the shrinkage, and improves the mechanical properties. This technology uses the ready-made compact vibration table in lost foam casting, and through the mechanical vibration generated by the vibration motor, the molten metal is nucleated under the encouragement of power to achieve the purpose of detailed design. It is a simple operation, low cost, and approach to environmental pollution.
Semi-solid lost foam casting skills
Semi-solid lost foam casting technology is a new casting technology combining lost foam casting technology and semi-solid technology, because the feature of this process is to control the relative proportion of liquid and solid phase, also known as change control semi-solid forming. This technology can improve casting density, reduce segregation, improve dimensional accuracy and casting performance.
Lost Pattern Shell Casting Skills
Lost foam shell casting technology is a new casting method that combines investment casting technology with lost foam casting. The method is to coat several layers of refractory material on the surface of the foamed plastic made by a foaming mold with the same shape as the part. , and then pouring to obtain a new type of precision casting method for castings with higher scale precision. It has the characteristics of large appearance scale and high precision in lost foam casting, and has the advantages of crust precision and strength in investment fine casting. Compared with ordinary investment casting, it is characterized by low cost of foamed plastic molding materials, convenient surface bonding and combination, and easy gasification and disappearance, which overcomes the problem of investment deformation caused by easy softening of investment casting molding materials, and can produce more Large-scale messy castings of various alloys
Lost Foam Levitation Casting Skills
The lost foam suspension casting technology is a new and useful casting technology combined with the lost foam casting process and suspension casting. The technical process is that after the molten metal is poured into the mold, the surface of the foam plastic is vaporized, and the suspending agent mixed in the riser model (or the suspending agent is placed in a specific position of the appearance, or the suspending agent and EPS are combined to make a foam appearance) ) Phytochemical reaction with molten metal to improve the overall (or partial) structural performance of the casting.
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