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WHEN AND WHY TO USE NINGBO ROTIE ?

Casting Resource:

When you need to meet stringent project deadlines, To test for form, fit, and function – eliminate design flaws and other costly problems before production,
When you need parts while ramping-up to full production, To simulate your cast parts before paying for expensive hard tooling,
When you require high quality castings in quantities from 1 to 5,000 pieces per year.

 

Precision Machining:

When you need castings post-machined to high tolerances,
When you need parts fully machined from stock, 10 CNC Vertical Mills and 5th Axis machines,
Founded in 2010, we happily celebrated our 10th Anniversary last year and look forward to working with you for another 10 years.


WHAT IS POST TENSIONING ?

Post-tensioning is a method of reinforcing (strengthening) concrete or other materials with high-strength steel strands or bars, typically referred to as tendons. Post-tensioning applications include office and apartment buildings, parking structures, slabs-on-ground, bridges, sports stadiums, rock and soil anchors, and water-tanks. In many cases, posttensioning allows construction that would otherwise be impossible due to either site constraints or architectural requirements.


Although post-tensioning systems require specialized knowledge and expertise to fabricate, assemble and install, the concept is easy to explain. Imagine a series of wooden blocks with holes drilled through them, into which a rubber band is threaded. If one holds the ends of the rubber band, the blocks will sag. Post-tensioning can be demonstrated by placing wing nuts on either end of the rubber band and winding the rubber band so that the blocks are pushed tightly together. If one holds the wing nuts after winding, the blocks will remain straight. The tightened rubber band is comparable to a post-tensioning tendon that has been stretched by hydraulic jacks and is held in place by wedge-type anchoring devices.