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High Thermal Stability EVA Film for Vacuum Process Casting Auxiliary Materials - Non-Toxic and Improves Surface Finish

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High Thermal Stability EVA Film for Vacuum Process Casting Auxiliary Materials - Non-Toxic and Improves Surface Finish

Brand Name : TOVAC

Place of Origin : Shandong, China

Thermalstability : High thermal stability

Compatibility : Suitable for various casting alloys

Usagemethod : Mixed with base materials during casting

Origin : Manufactured according to industry standards

Application : Vacuum casting process

Safety : Non-toxic and environmentally friendly

Temperatureresistance : High

Productname : Vacuum Process Casting Auxiliary Materials

Shelflife : 12 months under recommended storage conditions

Storageconditions : Cool, dry place away from direct sunlight

Materialtype : Auxiliary materials

Performanceenhancement : Improves casting surface finish and reduces defects

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In V-process (Vacuum Molding) casting, the V-process film is the core consumable and is often referred to as the “soul” of the V-process. It not only replicates the mold geometry but also plays a critical role in sealing the dry sand and forming the mold cavity.

1. Main Material: EVA as the Mainstream

EVA Film:

Advantages:

High elongation for easy forming

Low elastic recovery to prevent shrinkage after forming

Low gas generation to reduce casting porosity defects

Environmentally friendly

Characteristics:

Sensitive to heating temperature, allowing precise control during the forming process

2. Film Thickness and Classification

The selection of film thickness is critical depending on the complexity and size of the casting. The typical thickness range is 0.05 mm to 0.30 mm.

Film Type

Thickness Range (mm)

Typical Applications

Ultra-Thin

≤ 0.10

Fine-surface flat castings, low-carbon steel castings (e.g., locomotive frames)

Thin

0.10 – 0.20

Medium castings with relatively simple surfaces (e.g., pump housings, bathtubs, boiler plates)

Thick

0.20 – 0.30

Large castings with complex geometries (e.g., gearbox housings, counterweights)

Extra-Thick

≥ 0.30

Extra-large, deep-structure castings (e.g., large machine tool beds)

Note: Thicker films increase material consumption and gas evolution. Therefore, whenever possible, use the thinnest film that still ensures proper mold forming.


Product Tags:

High thermal stability EVA Film

      

Non-toxic Vacuum Process Casting Auxiliary Materials

      

Improves surface finish V-Process Film

      
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