Laminated Sand Casting Process
Laminated sand casting is a casting process in which the surface of core box is covered with a layer of laminated sand mixed with phenolic resin during molding and core making, and heated and hardened into a shell. According to the technical requirements of different users, it strives for a perfect combination of normal temperature performance, high temperature performance, collapse, fluidity, and surface roughness of castings, and is widely used in the industries of automobile engines, diesel engines, hydraulic parts, etc.
Features of laminated sand: suitable strength performance; good fluidity, clear contour of the sand, sand core, dense organization, can produce complex sand core; sand (core) surface quality is good, surface roughness up to Ra = 6.3 ~ 12.5μm, dimensional accuracy up to CT7 ~ CT9 grade; good collapsibility, easy to clean the casting.
Scope of application: the overlay sand can be made both for casting and sand core, the type or core of overlay sand can be used with each other and with other sand types (cores); it can be used not only for metal gravity casting or low pressure casting, but also for iron overlay sand casting, and also for hot centrifugal casting; it can be used not only for the production of cast iron and non-ferrous alloy castings, but also for the production of cast steel parts.
Water glass casting process
The glass is melted and molded through the mold. Generally realize that after the mold is manufactured, the glass melt is injected into the mold or realize that the pre-made mold is stacked with broken glass in the mold, and put into the furnace together with the mold for melting, and anneal the mold with glass domain anastomosis after molding.
1、Lost wax casting method 1), the original mold made of clay 2), turning the silicone rubber negative mold and fixed with plaster 3), in the silicone rubber mold filled with wax liquid, pouring out the wax "prototype", called "wax mold" 4), cooling and remove the wax type, refinement 5) A refractory plaster embedded wax type 6), heating dewaxing, in the high-temperature resistant materials to form a prototype shape 7), the glass block filled into the mold, placed in the kiln for heating, glass block gradually melting fusion, until completely filled with cavities can be annealed, condensation molding blowing glass manufacturing process steps
(1), picking material: first about 1200-1500 mm length of iron or stainless steel tube is placed in the furnace to heat one end to the appropriate temperature, in order to stick to the glass liquid, grading this dipped in the crucible of molten glass
(2), blowing bubble: pick out the material, rolled into a glass mass in the rolling board or rolling bowl, blowing air from one end of the blowing rod on a special production table in the softened state of the glass, so that it becomes a hollow thick-walled bubble, and then either blow it into a large material bubble, or use the fluidity of the glass itself to form the bubble
(3), shaping: in the non-stop rotation and blowing, so that the material bubble constantly expanded, the operation is only the use of pliers, shears, tweezers, clamps
(4), finishing: products should be annealed in the mouth of the cut, baked mouth and other processing finishing 3: light processing process used tools: torch, anvil, tweezers, needle, scissors, pliers used in the process methods: squeeze, pull, pliers, sticky, cut, wrap, bend
Investment casting, also known as lost wax casting, includes the processes of pressing wax, repairing wax, forming trees, dipping, melting wax, casting metal liquid and post-treatment. Lost wax casting is to use wax to make the wax mold of the parts to be cast, and then the wax mold is coated with mud, which is the mud mold. After the clay mold is dried, the internal wax mold is melted in hot water. After melting the wax mold, the clay mold is taken out and baked into a ceramic mold. Once it is fired. When the clay mold is generally made, the pouring mouth is left, and then the molten metal is poured through the pouring mouth, and after cooling, the required parts are made.
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