The design and manufacturing cost of aluminum extrusion mold accounts for about 20% of the total production cost. It is not only one of the key technologies of the aluminum extrusion industry with many variables and rapid development which involves the material, design, manufacturing, testing, mold repair, management, and many other links, but also one of the fields with great development potential. Therefore, what measures are taken to improve the pass rate of aluminum extrusion mold? Maybe the following aspects can be a more reasonable use of those kinds of molds to improve the qualified rate of the molding machine.
1. Strict implementation of aluminum profile production process rules and regulations
The extrusion process must be carried out by the corresponding aluminum profiles strictly. The boot process aluminum rod furnace middle temperature setting in 530-550 ℃, setting outlet in 480-500 ℃, and the holding time should be enough to ensure the rod is warm and permeable (i.e., is the core and surface temperature), to avoid the increase of the elastic deformation of the mold due to the duplicity of the temperature of the aluminum rod (insufficient temperature of the heart),. Thus, the phenomenon of "wall deviation" and "different length" is aggravated, and even the extrusion die is scrapped due to plastic deformation.
2. Make sure the “Three heart unity”
The center of the extrusion cylinder, the center of the extrusion rod, and the center of the die seat must be visually concentric, and no obvious eccentricity is allowed. Otherwise, it will affect the flow rate of the product everywhere, and even affect the product molding or make the length of the extruded product between the left and right sides larger, and unable to squeeze production. For one out of more than two porous molds, the requirements are more strict.
3. Reasonable selection of support pad
Must choose the appropriate size of the double hole, cantilever large special support pad to reduce the elastic deformation of the mold, so that the extrusion products forming stable, small size change; And must be in the mold before the double hole special support pad to find spare to avoid the mold out of the oven because it takes too long to find the support pad so that the mold cooling too much and stuffy car; It is recommended that the support pad must also be heated and the general temperature should be controlled at 350 to 450℃. Especially for the opposite sex complex section and porous series, it is essential to choose a reasonable support special pad.
4. Strengthen the information feedback in the process of aluminum extrusion
(1) Information feedback of extrusion mold plug mold
There are many reasons for the plug mold, such as die processing, blocking on the empty knife, empty knife processing burr, small empty knife, the depth of the empty knife is not reasonable, and the mold design work with an unreasonable, guide plate, shunt hole design is also easy to lead to molding blocking, people with no specially trained are generally difficult to express clearly. After the corresponding mold repair personnel personally check and find the reason, the mold can be burned, repaired, and proposed change plan.
(2) Feedback on discharge molding
In addition to the extrusion die number is clearly marked in the head, but also in the head to mark head is difficult to see the overall flow situation, such as "hand over" material (indicating that the inner side of the two holes is slow and the outer side is fast in the actual extrusion process), "discharge phase" (indicating that the inner side of the two holes is fast and the outer side is slow in the actual extrusion process), “short long left-right" (indicating the left branch is long and the right branch is short, and the difference in length should be noted). Because the interruption saw to the discharge port distance of about 6 meters, the usual form of "A meters /6 meters" is that the component that is different in length is A meter for every 6 meters, this perfect and accurate expression is conducive to the correct judgment and maintenance of mold repair personnel.
(3) Size out of tolerance information feedback
When the discharging molding is normal but the size is out of tolerance, a section of the sample must be fully and correctly marked (extrusion die number, discharge direction, dimensional defect, etc.). Any one of these mismarks may lead to the wrong mold repair, therefore, great attention must be paid to providing accurate material samples including the front, middle, and tail material.
As mentioned: The above four measures roughly use aluminum extrusion mold to improve the qualified rate, reduce the cost squeeze, and decrease The Times of mold computer. Of course, according to the actual situation, the specific analysis of aluminum material out of the situation, makes a reasonable judgment. It also has a great relationship with each repair mold repair method, design and processing are also a top priority, of course, the mold has been formed, repair the tool to determine the number of times the molding machine, so the machine information feedback is very important. Of course, we also have to believe in our own judgment ability and grasp the accuracy of the material.
