plastic mold

Dean

21 Oct, 2012 01:48 AM

on the mold its called ejector pins and/or ejector sleeves.

on the part its called witness lines, marks

download gif image and view animation in your browser

1. Step 1:

   standard ejector pin
   

   

2. Step 2:

   stepped ejector pin
   

   

3. Step 3:

   ejector sleeve
   

   

4. Step 4:

   ejector pin in sleeve
   

   

5. Step 5:

   blade ejector pin
   

   

6. Step 6:

   core pin
   

   

7. Step 7:

   ejection process showing why witness marks appear
   

   

8. Step 8:

   ejecting part