What is the structure of the double sand frame plywood sanding machine
The double sand frame plywood sanding machine, as the core equipment for board processing, directly determines the processing accuracy and efficiency through its structural design. This model usually adopts a two roll and one pad layout, and achieves double-sided synchronous sanding of the board through the collaborative operation of the upper and lower double sand frames. It is suitable for fixed thickness processing of materials such as plywood, particleboard, and medium density board.
Core structure analysis
Front sand rack system
The front sand frame adopts an adjustable steel roller design, with a roller body diameter usually ≥ 200mm, and the surface is hardened to improve wear resistance. The steel roller is pressure regulated through a hydraulic system, coupled with a sand belt tensioning device to ensure a tight fit between the sand belt and the plate. The single-sided sanding amount can reach 0.1-0.5mm.
Rear sand frame combination mechanism
The rear sand frame consists of rubber rollers and polishing pads. The rubber rollers are made of elastic synthetic rubber with a 30 ° rebound memory function, and the sand belt running speed can be adjusted within a range of 12-25m/min. The polishing pad is controlled by a cylinder to lift and lower, used to eliminate sand marks in the previous process, with a surface roughness Ra ≤ 3.2 μ m.
Feeding and dust removal system
The feeding end is equipped with a variable frequency speed control motor, with a speed range of 4-16m/min, supporting stable transportation of different materials of boards. The dust removal system is designed with a flow rate of 12000m ³/h and uses negative pressure suction ports to remove dust, ensuring a clean processing environment.
Technical advantages
This model adopts PLC centralized control, supports network communication with the upper level computer, and the fault self diagnosis function can quickly locate problems. The overall mineral casting structure enhances the rigidity of the equipment, and the dynamic balance treatment ensures smooth operation of the sanding roller, extending the service life of the sanding belt by more than 30%.
