The rationality of mold design is an important link in extending its service life. Extruded aluminum profiles generally have asymmetric cross-sections and unequal wall thicknesses. When designing molds, attention should be paid to both the arrangement of mold hole positions and the specific situation. By changing the height of the mold hole working strip, the fluidity of the metal can be improved. Below is a brief analysis of the general problems that exist in the design of plastic mold processing manufacturers

1. For profiles with varying wall thicknesses, the design method of unequal length work strips should be adopted. Ensure the uniformity of metal flow.

2. Adjusting the radius of the transition fillet and the length of the work strip appropriately can avoid stress concentration.

3. The determination of the hole size for plastic mold processing should comprehensively consider the properties of the profile and the shrinkage rate of the mold material. For 6063 aluminum alloy and commonly used mold steel 4Cr5MoSiV, the shrinkage rate of the mold hole should be set at 1.01% to 1.09% during design, which can be appropriately selected based on the size of the mold hole.

4. Determine the number of mold holes based on the elongation coefficient. The number of die holes directly affects the size of the elongation coefficient. If the extrusion ratio is too high, it will cause the extrusion force to exceed the normal value and damage the mold. If it is too small, it will cause a decrease in the mechanical properties of the extruded product. Generally, the elongation coefficient of the extrusion coefficient should be between 10 and 50.

5. Reasonably arrange the position of mold holes.