From the personal collection of Steve Redick:
These old photographs were taken during a 5-alarm fire at 1531 Michigan Avenue on April 7, 1971. The images capture a dramatic moment in Chicago's firefighting history, showing vintage Chicago Fire Department snorkels and equipment responding to the blaze.
Photographer unknown
These photos are a rare glimpse into the past, offering a visual record of how firefighters once operated. The use of snorkel apparatus was common in the 1970s, especially for high-rise buildings or large industrial fires. While the photographer remains unidentified, the images speak volumes about the dedication and bravery of the Chicago Fire Department during that time. Whether you're a history buff, a photography enthusiast, or just curious about the past, these photos are a fascinating look back at a pivotal moment in the city’s emergency response history.
Metal Injection Molding Service
Metal Injection Molding (MIM) service is a new metal processing technology that combines metal powder with a binder to form a mixture that is injected and molded into a green compact. The MIM service process includes the following steps:
- Preparation of metal powder: The required metal powder is mixed with a binder such as a thermoplastic or thermosetting plastic by ball milling or other methods to form a homogeneous mixture.
- Injection molding: The mixture is placed in an injection molding machine, heated to melting, and injected into a mold to form a green compact of the desired shape.
- Sintering: The green compact is subjected to high-temperature sintering to remove the binder and densify the metal powder.
- Finishing: The sintered compact is finished to obtain the required dimensions and accuracy of the product.
The MIM service process is characterized by high precision, high efficiency, and ability to process complex shapes, and is widely used in the electronics, machinery, automotive, and aerospace industries.
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