About Rubber Molds

Common Types of Rubber Molds

In the manufacturing of rubber molds, some commonly used mold types include:

1. Open Molds

Open molds are the simplest and most common type of rubber molds. They consist of two flat panels, and rubber material is poured between them. Open molds are suitable for producing flat, simple-shaped, or small-sized rubber products.

2. Closed Molds

Closed molds, also known as box molds. They are composed of two or more mold shells, completely enclosing the rubber material inside the mold. Closed molds are suitable for manufacturing rubber products with complex shapes, precise dimensions, and internal cavities.

3. Rubber Injection Molds

Rubber injection molds use a process similar to plastic injection molding, injecting molten rubber material into the mold using an injection machine. This type of mold is suitable for manufacturing high-precision, complex-structured rubber products, such as seals and rubber parts.

4. Compression Molds

Compression molds involve placing rubber material in a heated mold and applying pressure to fill the mold cavity and cure the material. This type of mold is suitable for manufacturing large, sturdy rubber products with specific hardness requirements.

5. Male and Female Molds

Molds Male and female molds are a pair of molds used to manufacture rubber products with specific shapes. The male mold is the part of the mold with the desired shape, and the female mold complements the male mold. This type of mold is suitable for manufacturing rubber products with complex surfaces or unique shapes.

Rubber Mold Materials

In the manufacturing of rubber molds, some commonly used mold steel materials include:

1. S50C Steel

S50C is a common carbon structural steel with good cutting performance and mechanical properties. It is suitable for manufacturing rubber molds of general shapes and sizes.

2. S136

Steel S136, also known as 420 steel, is a stainless steel mold steel. It has excellent corrosion resistance and wear resistance, making it suitable for manufacturing rubber molds, injection molds, and die-casting molds.

3. P20 Steel

P20 is a high-quality pre-hardened mold steel with good cutting performance and mechanical properties. It is suitable for manufacturing large or complex rubber molds, especially for injection molding.

4. H13 Steel

H13 is a hot work mold steel with excellent heat resistance and wear resistance. It is suitable for manufacturing molds in high-temperature environments, such as rubber hot-pressing molds.

5. NAK80 Steel

NAK80 is a high-hardness pre-hardened mold steel, suitable for manufacturing injection molds and die-casting molds. It has excellent cutting performance and high-temperature stability.

6. 718H Steel

718H is an improved version of 718 steel with higher hardness and strength. It is suitable for manufacturing rubber molds that require high precision, strength, and heat resistance.

7. 2311 Steel

2311 is a pre-hardened mold steel with moderate hardness and good wear resistance. It is suitable for general mold manufacturing, including rubber molds.

8. 2344 Steel

2344, also known as H13 steel, is a hot work mold steel. It has excellent heat resistance and wear resistance, suitable for the manufacturing of rubber molds in high-temperature environments.

9. 2738 Steel

2738 is a high-quality machinable mold steel with high hardness and strength. It is suitable for manufacturing large rubber molds, such as rubber extrusion molds.

10. S7 Steel

S7 is a cold work mold steel with good toughness and wear resistance. It is suitable for manufacturing rubber molds with complex shapes and high precision requirements.

11. NAK55 Steel

NAK55 is a low-shrinkage pre-hardened mold steel with good dimensional stability and wear resistance. It is suitable for manufacturing high-precision rubber molds.

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