Mould parts or products are in industrial production, with a variety of presses and special tools mounted on the press, by the pressure to the desired shape of the metal material, this special tool referred to as metal molds.

Life and mold metal mold design, mold steel selection, heat treatment, surface treatment, machining, grinding, wire cutting process, stamping equipment, materials and processes stamping, die lubrication, maintenance levels and poor and many other factors. Various factors which caused the failure of the mold, the mold structure is unfair, improper selection of about 25%, about 45% of improper heat treatment, process about 10% of the subject; equipment problems, lubricants and other factors account for about 20% of the topic. Metal stamping parts to pay attention to maintenance after installation, to prevent rust erosion in daily use to light off light on, to prevent hard off hard to open, causing damage to the following is the first volume of how to prevent damage to metal stampings.:

1, with the metal parts of the models, specifications and performance should be consistent with existing national scale and related to the establishment, and with the choice of steel doors match.

2, the width of more than one meter of sash windows, or install double-glazed windows and doors, should set the double pulley, or choose to move pulley.

3, friction stay hinges shall be made of aluminum alloy, stainless steel should be used.

4, with the fastening screws mounting hardware necessary features metal liner, liner thickness should be at least greater than twice the distance of the fasteners teeth. Shall not be fastened on the plastic profiles, nor the use of non-metallic liner.

5, gold should be the final installation hardware accessories, door and window locks, handles, etc. should be in the window frame and then assembled into the doors to ensure accurate location, switching and flexible.

6, after the installation of metal stampings to pay attention to maintenance, to prevent rust erosion. In everyday use to light off light on, to prevent hard off hard to open, causing damage. No noise, there is now a nylon wheel, which not only sliding up and no noise, and smoother, lighter, shorter service life than all of these pulleys. Make the (door) window properly. Smooth operation, it is necessary to (door ) window to choose a high-quality pulley. poor pulley surface, relatively rough work. no smooth sliding up and not flexible, small and light.