Manufacturing technology of conveyor belt

The manufacture of steel wire rope core conveyor belt mainly includes the preparation of rubber compound, film calendering and compounding, hanging steel wire rope, adding tension, cold pressing forming of belt blank, vulcanization and other main processes.

Preparation of rubber compound. Plastering/mixing should be carried out before use (synthetic rubber generally does not need plasticizing), that is, the processing process of mixing raw rubber and additives evenly. The purpose is to reduce viscosity and improve plasticity to meet the technological requirements of the following processing procedures. Plastic/mixing can be carried out in two ways: open mill or internal mixer.

After rough refining and refining, the rubber compound is made into a film with a certain thickness by a calender, and then the core rubber film and the covering film are combined to form. Hang the wire rope on the spindle frame, pass through the tension station, conduct positioning carding, be clamped by the cold-pressed flat plate and clamping plate, and apply a certain tension to the wire rope. The upper and lower sides of the tensioned steel wire rope are covered with composite films, which are pressed into a whole by a cold-pressed flat plate, and then heated and pressurized by a flat plate vulcanizer to vulcanize in turn, thus obtaining the finished product. Taking the canvas core conveyor belt as an example, the manufacturing of fiber core conveyor belt mainly includes the main processes of rubber preparation, tape calendering, edge rubber extrusion, conveyor belt molding and vulcanization.

Preparation of rubber compound is the same as that of steel wire rope conveyor belt.

Tape calendering refers to the process of compounding the plastic/mixed rubber compound on canvas fabric by calendering machine after rubbing or pasting. It consists of dipping and drying of canvas, rough refining and refining of rubber compound, rubbing (pasting) of canvas, cooling and curling of canvas.

Edge glue extrusion. Using a rubber extruder, the rubber compound is extruded into rubber strips with required sections. The molding process is generally divided into two steps. First, the belt core is molded, and then it is integrated with the upper and lower covering adhesive and the edge tape adhesive.

Vulcanization generally has two ways. The flat vulcanizer is used to vulcanize in turn in stages, which is intermittent vulcanization; The drum vulcanizer is used for intermittent vulcanization, which is continuous vulcanization.