Holder for car cable

Free-form injection molding in the automotive sector

The challenge

Insufficient stock of spare parts.

Solution

Use FIM to manufacture spare parts from customer-specific material

BASF Ultramid® 30% glass-filled PA66.

Part Design

This part design was provided by a leading global automotive manufacturer based in Germany. STEP files are preferred for FIM.

60 minutes

Mold making

The next step is to convert the STEP file into a mold design. To do this, the part is rotated into a cavity in a block of material, and then the inlet opening(s) and the first vent are added.

2 hours

Print tools

As it was a large piece, the mold was divided into two parts and put together.

5 minutes

Freeform Injection Molding (FIM)

The parts were formed on a 50-ton press. The FIM molds work hand in hand with every installed basic molding system.

An aluminum mold frame was used to hold the large mold assembly in place.

1 day

Demolding

The alkaline Nexa3D solution was used to demold these parts over a period of 2.5 days.

This time can be optimized by redesigning the mould or by removing part of the mould before demoulding.

The holder above comes straight from the tool: no post-processing, no polishing. The details in the design and the functionality of the part stand out clearly.

Total time to the injection-molded part:

3 hours 5 minutes + 1 day demolding

Observations

  • The construction of the molds is a simple process.
  • The material (BASF Ultramid®) fills the molds well in the first test rounds.
  • Optimization for demoulding is always a good thing and improves the subsequent iterations.
  • Data sheets were used for mold data, settings, pressure, temperatures and more.
  • Iterating the design, changing the materials or both based on the results achieved are just some of the benefits of working with
  • Freeform Injection Molding.

Live tests for 9 weeks:

3 days after receipt of the partial draft

Result

The parts were installed in a series of high-end sports cars.

  • The part is located directly above the turbocharger in the engine area
  • Several parts were tested under real conditions for more than 9 weeks:
    • Extreme temperature conditions.
    • Humidity test.
    • UV exposure.
    • Various vibration conditions.
    • Mechanical performance tests.

The parts have passed all tests