compression rubber molding
Compression Molding is the most fundamental method for molding rubber. A cut-to-weight quantity of uncured rubber is placed into the open cavities of an open mold. The mold is closed as far as possible and placed into a heated hydraulic press. Pressure from the press causes the uncured rubber to form into the shape of each cavity, as heat from the hydraulic press vulcanizes the product.
advantages of compression molding
- Less compound waste
- Excellent choice for bulky and high durometer parts
- Good for low production runs
disadvantages of compression molding
- Product flash is thick
- Labour-intensive finishing
- Raw rubber must be prepared for each cavity
- Compression time is general longer
- Inserts may be distorted
