the requirements of the operating accessories

The materials to make operating parts shall comply with the provisions of the corresponding national standards. Press GB699, 35 steel Q235 press GB700 - A, ZL102 GB1173, HT200 GB9439. Allowed the use of performance requirements are not less than the foregoing grades of other materials.

Plastic brand choice according to the using requirement. Enhancement is recommended for the resin. Allows you to use not less than other materials reinforced resin performance requirements.

There is no casting cracks, porosity, voids, porosity, slag inclusion and other defects.

Plastic parts are not allowed to have a raw, defects such as inclusions, foaming.

Operating surface must be smooth, uniform color, plating surface crystallization meticulous, no hint, hulling, hair flower, blackened, pinhole defect, the plating surface are not allowed to have obvious yellow. Chromium plating on the surface of the polishing should be light. Sandblasting the surface chromium plated parts are not allowed to have obvious color inconsistencies. Plastic parts are not allowed to have defects such as deformation, flow mark, crack, oil pollution.

The size of the product tolerances shall comply with the terms of the product standards.

Shape tolerance requirement for metal parts, plastic parts of the form tolerance is controlled by the manufacturer.