Design tips for MIM component manufacturing
For product planning
- Parting line
The line mark at the mould parting interface is unavoidable.
In µ-MIM products, it is suppressed to a level that cannot be visually distinguished, however, we design the mould so that the parting line will not locate at the area that the surface roughness is crucial.
- Gate mark
It is also unavoidable for the material injection port as a gate mark. We design the gate size and location to avoid the problems such as affecting the part function, productivity as well as quality stability.
- Ejector pin mark
When the component is removed from the mould, the component is pushed out with pins, and the traces of the pins are generated.
We design the mould so that the ejection pin marks do not affect the component.
- Draft angle
It is the inclination to remove the component from the mould.
Generally, around 1 degree is required however, we can propose a design that minimises the angle.
- Undercut design
It is a design that moulded parts cannot be removed from the mould.
We will respond by using a slide system in a mould and / or 3D-μMIM® technology.
- Sharp corner design
Adding a curve or chamfer plane at the corner leads to stable quality. We propose a minimal design as needed.
- Runner type
There are two types of mould runners.
Our feedstock yield is 100%, therefore, we propose the runner system design depending on the production volume and mould budget.
Sprue, Runner Injection cycle time Adequate production quantity Cold runner Yes Long ≤ 100,000 pcs/month Hot runner No Short ≥ 100,000 pcs/month