Neuman USA has been in the impact-extrusion business for over 35 years. Neuman USA knows impact extrusion. We have created many of the techniques used in this manufacturing process.
Impact extrusion consists of three primary approaches: Reverse Impact, Forward Impact and Combination Impact.
![](https://neumanusa.com/wp-content/uploads/2020/12/reverse_impact.png)
Reverse Impact
A lubricated slug is placed in the die cavity and struck with the punch, forcing the metal to flow out of the die and around the punch.
![](https://neumanusa.com/wp-content/uploads/2020/12/forward_impact.png)
Forward Impact
Metal is forced through the orifice of a die by the action of a punch, causing the metal to flow in the direction of punch travel. The punch fits the walls of the die so closely that no metal escapes backwards.
![](https://neumanusa.com/wp-content/uploads/2020/12/combination_impact.png)
Combination Impact
Combines forward and reverse metal flow and is used to produce complex shapes. A lower punch may also be incorporated with an upper punch so the metal is forced upward into the punch until the cavity is filled.