The CAC (Compressed Air Chiller) is a compressed air cooling unit that cools the inside of the product on blow molding machines. Instead of the normal blowing air fed into the product during blowing, it delivers compressed air chilled to −35 °C.
Why cool from the inside?
Cooling is the longest and most critical part of the solidification process. The mold draws heat only from the outer surface of the product; this means stress in the material and a long cooling time in the mold. With CAC, heat is also removed from the inner surface of the product. Material stress is reduced and the cooling time shortens.
Operating principle
The internal cooling system has been developed to draw intensive heat from inside the blown product. The units are produced in 5 standard sizes; the process air is 120 – 540 Nm³/h and the compressed air outlet temperature is −35 °C.
Product-specific blow pins direct the chilled air to the critical areas of the product and ensure efficient exchange of the air. The blowing valve block controls the blowing process and can be made to suit any type of blowing process.
Manufacturer data
- Depending on the product, the production increase can reach up to 40%; in the canister, bottle and technical part examples in the brochure, values between 18% and 27% are given.
- Thanks to the constant cooling process, quality fluctuations are reduced.
- The manufacturer gives the payback of the investment as between 1 month and 1 year.
Use
It runs fully automatically and is easily integrated into the production process. It is suitable for almost all blow molding machines. Energy and maintenance costs are low; the system is CFC-free. For a more compact, lower-investment solution, see the BMB Blow Mould Booster page.
