Extrusion mold adjustment procedure

Shanghai extrusion mold adjustment

Operation process workers try to master the extruder of the process they are operating.

To properly master the characteristics of the screw extruder, the control of heating and cooling, the characteristics of the car dashboard, fiber optic cable fiber optic cable traction machine control die shell structure and installation, etc., so as to facilitate proper mastery of the extrusion production process specifications, the appropriate operation of the process of machinery and equipment.

Adjustment of the general operation steps are as follows:

(1) Before starting the machine, check whether the temperature control is sensitive, whether the instrument panel in the car is invalid, whether the cooling water circuit is smooth. Generally use a thermometer, through the refrigeration cooling circulating water and other methods of detection.

(2) according to the safety of extrusion machine safety regulations will be extruder screw extruder, barrel and die head for heating, to be the temperature rose to the set temperature, and shall be insulated again heat insulation for a very long time before you can start, to promote the temperature of each part of the machine and equipment to maintain a long period of time.

(3) Before starting the machine, we must tighten the connecting screws and ground screws of each part of the die head with heat. Before the raw material is extruded, the worker should not stand in front of the die opening to prevent the ground screw or dowel from cracking and causing accidents.

(4) When extruding slowly, the screw extruder ratio should be slowed down and then speeded up gradually to prevent damage to parts due to running load.

(5) start, the first put a small amount of raw materials, and keep adding material balanced, adding material to pay close attention to the torque and other kinds of table value, to be raw materials from the die head die mouth extrusion and hauling on the hauling belt machinery and equipment, can gradually increase the amount of material until all the normal extrusion.

(6) slowly hauling belt, shaping die and die head need to have a certain interval to facilitate the hauling belt. Will open the waterway (note that water can not be drenched in the die head, otherwise it will lead to die head into the material confusion and lead to cut material or blocking the mold), the mold complex inner wall is small and a die of two-cavity aluminum alloy profiles need to be shaped die cover open; in clear extrusion of raw materials melting all normal, based on the hauling belt has been set up to haul the raw material to the fiber optic cable cable hauling machine. Reduce the interval between the shaping table and the die head, cover the cover plate, operate the vacuum pump, to be extruded when the rate of traction belt speed is basically balanced, observe the aluminum alloy profiles to all normal extrusion, and then the shaping table and the die head interval shrink to the rationalized value.

(7) If you find the billet in the shaping die safety channel end of the poop is not formed or the internal tendons adhere to the surface of the aluminum alloy profile cavity, can be used in the shaping die channel end of the billet poop is not shaped parts or the internal tendons of the part of the poke a number of small round holes, so that the small inner wall and the gas through the whole line of the car, the billet into the shaping die was open, easy to cause the negative working pressure to promote the die billet die die sticking to the die wall of the shaping die.

(8) in case of blocking the mold (not plugged), should be immediately shaped table back or increase the speed of the traction belt, or in addition to the implementation of the above two programs, and then adjusted according to the production process to return to normal production and processing. If it has been plugged to implement the above program is ineffective, the shaping table should be backed up immediately, and along the shaping die shovel broken raw materials, shut down the shaping die of water vapor, reduce the speed of the traction belt, the aluminum alloy profiles from the shaping die slowly pulled out. If there is a part of aluminum alloy profile broken in the shaping die, it is necessary to dismantle the shaping die, and the stock items will be solved thoroughly clean and tidy.

(9) Shut down the equipment generally first to put standby material will be machine production and processing material extrusion exhaust, then standby and take advantage of the heat to dismantle the die head to clean the mold processing.