WIRE STRAIGHTENING AND MOLDING FOR RELAYS 



881 



thoy aid in ouidino; the pi'osrossion of wire inserts through the (he and 

 in locating the ineoniing wires in the die cavities. The operation of this 

 ejection or "knock-out" consists of freeing the wires and resin blocks 

 from the die cavities and then moving the newly molded cluster hori- 

 zontally from the lower die cavit3^ When the die surface has been cleared 

 by this indexing operation, compressed air is blasted across the die to 

 remove loose molding flash which might be present. With the completion 

 of the indexing operation, the ejector pins are restored to their original 

 position by spring pressure. As a precaution, reset pins are i)i()\ided in 

 case this spring pressure should be inadequate. 



COOLING AND CULL REMOVAL 



The next operations are those of cooling the plastic to minimize warp- 

 age and removing the culL Because the larger plastic block of the single 

 wire coml) has surface irregularities on one side and is smooth on the 



Fig. 16 — Cooling and culling section of automatic die 



