Take what measures to make aluminum extrusion die to improve the qualification rate of the machine
The design and manufacturing cost of aluminum extrusion die accounts for about 20% of the total production cost. It is one of the key technologies for the aluminum profile extrusion industry with many variables and rapid development. It involves materials, design, manufacture, inspection, mold repair and management. And many other areas are also one of the areas with great potential for development.
Therefore, the following aspects can be used to more reasonably use such molds to improve the mold machine qualification rate.
1. Strictly enforce the aluminum production process rules and regulations
Must be in strict accordance with the corresponding aluminum profile extrusion process, the middle of the aluminum rod furnace temperature is set at 530-550 °C during the boot process, the outlet section temperature is set at 480-500 °C, the holding time should be sufficient to ensure that the aluminum rod is warm enough Through the heart (that is, the heart and the surface are warm enough), to avoid the elastic deformation of the mold due to the uneven temperature of the aluminum rod (insufficient temperature of the heart part), thereby exacerbating the phenomena of “partial wall” and “different length” Occurs, even plastic deformation of the extrusion die and scrapped.
2, to ensure "three hearts together"
The center of the squeeze tube, the center of the squeeze rod and the center of the die holder must be concentric visually, and no obvious eccentricity is allowed. Otherwise, the flow velocity of the product may be affected, and even the formation of the product or the length of the extruded product may be different. Large and unable to squeeze production. For more than one porous mold, the requirements are more stringent.
3, a reasonable choice of support pad
Must choose the appropriate size of the double-hole, large cantilever special support pads, in order to reduce the elastic deformation of the lower die, so that the extruded product shape stability, small changes in size; and must be in the mold before the double hole dedicated support pad to find spare ,In order to avoid the mold out of the oven because of looking for the support pad takes too long to make the mold cooling too much and boring car; recommended support pad must also be heated General temperature control at 350 to 450 °C can be. Especially for complex cross-sections and porous series, we must choose a reasonable support special mat.
4, to strengthen the aluminum extrusion process information feedback
(1) Information feedback for extrusion die plugs
There are many reasons for plug mold, such as mold processing, blocking in the empty knife, empty knife processing burr, small empty knife, the impact of unreasonable depth of the knife, etc., as well as mold design work with unreasonable, deflector, diverter hole Unreasonable designs can easily lead to blockages. Those who have not been specially trained are generally difficult to express clearly. It is best to find out the reasons after the corresponding moderators have personally checked the model before they can model, modify the model, and propose changes.
(2) Feeding molding feedback
In addition to having a clear die head with an extrusion die number, it is also necessary to identify on the material head the overall direction of flow that is difficult for the material head to see, such as “cross-feeding” (indicating that the two holes are inside the actual extrusion process. Slow outboard side is caused by rapid outside), "discharge from the material" (indicating that the inside and outside of the two holes are slower in the actual extrusion process), "left long and right short" means that the left branch is long and the right branch is short, and the difference between the lengths should be stated. The quantity, because the distance from the interrupted saw to the discharge port is about 6 meters, so usually the form of “A meter/6 meter” means that the difference between the length and the length is A meter for each 6 meters, so perfect and accurate expression is beneficial to repair. The correct judgment and maintenance of the model personnel.
(3) Information feedback of oversize
In the case of a normal out-of-feed molding but a poor size, a sample must be taken to complete the correct identification (extrusion mold number, discharge direction, size defects, etc.). Any one of the identification errors may result in Fix the wrong mold, so it must be highly noted. Providing accurate samples preferably includes (front and mid-tail).
In conclusion, the above four measures are generally adopted to use the aluminum extrusion die to improve the qualification rate of the upper machine, reduce the extrusion cost, and reduce the number of die-up machines. Of course, according to the actual situation, the aluminum profiles should be analyzed specifically. To make reasonable judgments, this also has a great relationship with each repairman's repair method, design and processing is also a top priority, of course, the mold has been formed, the molder's knife method determines the number of machines on the mold, so on Machine information feedback is very important, of course, have to believe in their own judgment ability, grasp the accuracy of the material, believe that their own ability, how much the stage to solve the problem! ! !
