What issues to pay attention to when designing high-precision plastic molds
There are many issues that need to be paid attention to when designing high-precision plastic molds, because high-precision plastic molds have higher requirements for design and higher complexity than general molds. Before confirming the commencement of work, it is necessary to ensure that all processes have been determined to avoid problems during the processing. The following are some issues to pay attention to when designing high-precision plastic molds:
1. Precision injection mold design engineers should conduct feasibility analysis on the plastic product drawings provided by customers, determine the mold structure, and strictly regulate the product design process. This is the most important step in the design process and needs to be completed carefully to save time on subsequent work.
2. Analyze the product development diagram based on the precision injection mold design and prepare various materials required. By preparing materials based on the product development diagram, efficiency and accuracy can be improved, errors can be reduced, and design work can be completed quickly.
3. Determine the opening direction and parting line position of high-precision plastic molds. At the beginning of the design of each plastic product, it is necessary to determine the mold opening direction and parting line to minimize the core slider mechanism and minimize the impact of parting lines on the appearance. When designing, the reinforcement ribs, notches, protrusions, and other structures of the product should be aligned with the direction of the mold opening to avoid pulling the core, reduce seams, and extend the molding time.
4. After determining the direction of the mold opening, select an appropriate parting line to avoid the occurrence of reverse stitching and improve the appearance and performance of the mold.
5. Adjust the draft angle of the mold to avoid damage such as white edges, deformation, and breakage at the top of the product. When designing deep cavity structure products, the slope of the outer surface should be greater than that of the inner surface to ensure that the mold core does not move, obtain uniform product wall thickness, and ensure material strength and product opening time.
6. Different plastics have different wall thickness ranges, generally 0.54 millimeters. When the wall thickness exceeds 4 millimeters, it can cause problems such as long cooling time and shrinkage, and it is necessary to consider changing the product structure. Uneven wall thickness can lead to surface shrinkage, porosity, and fusion lines. Reasonable use of reinforcing ribs can increase the stiffness of the product and reduce deformation. When designing high-precision plastic molds, attention should be paid to the above issues to ensure the accuracy and efficiency of the design, in order to meet the requirements of high-precision plastic molds.