Michael Leibfritz Engineering Office
Your Specialist for Undercuts

L-Core The original

We design and manufacture custom sinkers tailored to your specific requirements. With over 35 years of experience in sinkers, we are a reliable and knowledgeable partner. From the initial idea to the finished solution, we guide you through every step of the project and offer customized solutions that are perfectly suited to your application.

We manufacture recessed cores ranging from Ø 6 mm to Ø 400 mm. The maximum possible circumferential undercut is 23%.

The smallest diameter achieved to date was Ø5.8 mm.
The largest diameter achieved to date was Ø380 mm.

The largest sprue core produced to date had a contour diameter of 260 mm for a plastic part length of 850 mm. The total length of this sprue core was 1,030 mm. It was installed in a vertically closing mold.

Advantages over Screw-Out Tools

Smaller and More Cost-Effective Injection Molding Tools
Shorter cycle times
Simpler Tool Design
Easier Tool Assembly
More Options for Designing the Threaded End
A clearance groove at the end of the thread is possible
Simpler and More Effective Cooling

We offer various types of coatings .

This extends the service life.

Guaranteed Service Life

in cycles

uncoated500.000

500.000

coated1.000.000

1.000.000

Guaranteed Service Life

in cycles

uncoated500.000

500.000

coated1.000.000

1.000.000

For medical components, coated injection cores can be operated even without grease or oil.

We also manufacture expandable cores,
please feel free to contact us about this.

Kontakt

Michael Leibfritz
Engineering Office
Spessartstraße 7
72336 Balingen
Germany

+49 7433 37707

+49 170 1894333

+86 135 1084 2014