Improved safety, productivity and labor effort should be the goal of your organization. Let’s explore the principle of hanedashi and how it can help make your operations more effective and efficient. 

Overview: What is hanedashi? 

Hanedashi is a Japanese word meaning automatic ejection. It is a manufacturing principle that relies on the automatic discharge or ejection of a finished part. In a more traditional setup, the operator would:

  • Pick up a new component or part
  • Walk to the machine  
  • Set down the new part he was carrying 
  • Pull out the completed part and set it down 
  • Pick up the new part and load it in the machine 
  • Pick up the completed part again
  • Move it to the new step in the process

Utilizing hanedashi, the operator would pick up a new part, walk up to an empty machine, immediately load the new part because the finished part has been automatically ejected, pick up the ejected completed part, and move to the next step or machine. The machine automatically returns to its initial position, ready for the loading of the next part.

When several hanedashi-designed machines are placed in sequence, they form a chaku chaku line, meaning “load-load.” Because of the automatic ejection functionality, the operator can run multiple machines with less waste, less effort and in a safer manner. Below is a graphic comparing a standard line with a chaku chaku line using hanedashi.

Chaku chaku with hanedashi

An industry example of hanedashi

One of the largest auto battery manufacturers in the world traditionally used a single operator to load, run, and unload their machines. This was a costly, time-consuming, and often unsafe process. After visiting a sister plant in Japan, the plant manager decided to copy his Japanese counterpart and install a chaku chaku line using hanedashi automatic ejectors.

Productivity increased significantly because an operator could now simultaneously run four machines. Safety improved because the operator no longer had to reach into the machine to pull out a finished part or maneuver around to load it. 

Frequently Asked Questions (FAQ) about hanedashi

1. How does hanedashi work? 

Hanedashi is a device that automatically ejects a finished part at the end of the processing cycle. 

2. Can hanedashi be used with multiple machines?

Yes. A chaku chaku line is a series of machines operating with hanedashi ejection devices. This enables the operator to run multiple machines in a more efficient and safe manner because there is less manual handling of parts. 

3. What is the literal meaning of hanedashi? 

Hanedashi, a Japanese word, translates to automatic ejection, which describes the function of a hanedashi device.

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