Machine BedThe Scope Includes Large Machine Tool Bed Castings Such As Large Gantry Planer Body, Large Boring And Milling Machine Bed, Large Gantry Planer And Milling Machine Bed, Floor Boring Machine Bed, Large End Face Milling Machine Bed, Large Gantry Grinder Bed, And Large CNC Boring Machine Bed.
Characteristics Of Resin Sand Casting Machine Bed:
(1) Good Wear Resistance And Shock Absorption. Due To The Favorable Lubrication And Oil Storage Properties Of Graphite In Cast Iron, It Has Good Wear Resistance. Similarly, Due To The Presence Of Graphite, The Shock Absorption Of Gray Cast Iron Is Superior To That Of Steel.
(2) Good Process Performance. Due To Its High Carbon Content And Eutectic Composition, Gray Cast Iron Has A Relatively Low Melting Point, Good Flowability, And Low Shrinkage Rate, Making It Suitable For Casting Complex Or Thin-walled Castings. In Addition, Due To The Tendency Of Graphite To Form Chips During Cutting, The Machinability Of Gray Cast Iron Is Superior To That Of Steel.
The Relationship Between Hardness And Tensile Strength: There Is A Corresponding Relationship Between The Hardness And Tensile Strength Of Gray Cast Iron, And Its Empirical Formula Is:
1. When O ≥ 196N/mm ㎡, HB=RH (fly 00+0 4380b) (B1)
2. When 0 ≥ 796N/mm ㎡, The Relative Hardness (RH) Value In The HB=RH (44+O 7240c) (B2) Equation Is Mainly Determined By The Raw Material, Melting Process, Processing Technology, And Cooling Rate Of The Casting.
Advantages Of Using Resin Sand Casting Machine Bed Castings
1. Resin Sand Molds Have Good Rigidity And High Strength During The Initial Casting Stage. With The Conditions To Utilize The Graphitization Expansion During The Solidification Process Of Cast Iron, Shrinkage And Porosity Defects Can Be Effectively Eliminated, Achieving Less Riser And No Riser Casting Of Gray Cast Iron And Ductile Iron Parts.
2. Polystyrene Foam Molding Is Used In Casting Production, And The Self Hardening Sand Molding With Epoxy Resin Is Applied. When The Molten Metal Is Poured Into The Mold, The Foam Plastic Pattern Quickly Vaporizes Under The Action Of The High-temperature Molten Metal, Burns And Disappears. The Molten Metal Replaces The Position Occupied By The Original Foam Plastic, And Cools And Solidifies Into A Full Mold Casting With The Same Shape As The Pattern.
Relatively Speaking, Lost Foam Casting Has Great Advantages Over Traditional Sand Molds For Producing Single Or Small Batches Of Automotive Coverings, Machine Tool Beds, And Other Large Molds. It Not Only Saves Expensive Wood Mold Costs, But Also Is Easy To Operate, Shortens Production Cycles, Improves Production Efficiency, And Has Advantages Such As High Dimensional Accuracy, Small Machining Allowance, And Good Surface Quality.
