How To Choose Three Test Fixture Board

Test fixture plate is made of what materials, test fixture plate is generally used for the production of epoxy resin, synthetic stone and plexiglass and other materials, then the three materials of the test fixture what are the main features? For different test fixtures, how to choose different plates?

Selection of Plexiglass

General for the test fixtures probe holes larger than 1 mm, this kind of fixtures main plate mainly use plexiglass, because the price of plexiglass is low, at the same time the material is relatively soft, when drilling expansion and contraction of the probe, the needle casing and the hole can be combined tightly, the plexiglass plate of the test fixtures is transparent, once the problem is easy to check. But ordinary plexiglass in the drilling of holes is prone to melting and broken drill bit, characterized by drilling holes smaller than 0.8 mm in diameter.

Selection of durostone panels

The main feature of synthetic stone is the ability to maintain its physical properties in an environment of gradually rising temperatures, allowing it to achieve high standards of results and no deformation in the wave soldering process.

The high-temperature nanocomposites (composite stones) do not separate from the layers when exposed to the harsh environment of 350°C for a short period of time and a constant operating temperature of 260°C. The composite stones can improve the performance of PCBAs in wave soldering processes, and can be used in a variety of applications. Synthesized stone can improve the quality of PCBA in the wave soldering process, to avoid the golden finger or contact holes because of human contact and contamination.

Due to the characteristics of the synthetic stone, it is mainly used in insulation test fixtures, wave soldering, reflow soldering, tooling fixtures, over-oven trays, over-tin oven fixtures and other PCB and electronics industries.

Selection of Epoxy Resin board

General for drilling aperture less than 1 mm are used when the epoxy resin plate, plexiglass temperature deformation than the epoxy resin plate, if the test density is very high need to use epoxy resin plate. Epoxy resin plate drilling is not easy to break the drill bit and its toughness and rigidity are good, epoxy resin plate no expansion and contraction, so if the drilling aperture is not accurate will cause the probe casing and the hole is very loose between the shake. Epoxy resin plate is not transparent if the jigs and fixtures problems are more difficult to check.