Inner frame

1. the arrangement

There are "day" shape, "eye" shape, "field" shape, low density mesh, medium density mesh, dense mesh, honeycomb shape so on. In the case of the same material frame, the density of the mesh determines the performance of the composite door.

2. materials

(1) Pine, Chinese fir, solid wood finger joint other wood internal frames;

(2) The hollow steel plate, aluminum plate stainless steel plate are mixed with the inner frame made of the wood. The performance of this inner frame is very good, up to the grade.