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High precision plastic mold products have high requirements for design, and the complexity of mold design is higher than that of general molds. Therefore, all processes must be determined before starting work to avoid problems during processing. So, what should be paid attention to when designing high-precision plastic molds? Let's explore it together next.
Precision plastic mold products design engineers analyze the feasibility of the plastic product drawings provided by customers, determine the mold structure, and strictly define the product design process. This is the most important step. Pay attention to details and complete it meticulously, which can save a lot of time for the next step.
Analyze the product unfolding diagram according to the design of the precision injection molding product, and prepare various materials required for the design of the high-precision injection mold. Material preparation based on the product unfolding diagram can improve the efficiency and accuracy of material preparation, reduce errors, and facilitate rapid completion of the design work.
Determine the mold opening direction and parting line position of the high-precision plastic mold products; each plastic product needs to determine its mold opening direction and parting line before design begins, to maximize the reduction of core sliding block mechanisms and minimize the impact of parting lines on appearance. After determining the mold opening direction of the high-precision plastic mold, try to make the reinforcing ribs, bosses, protrusions, and other structural designs consistent with the mold opening direction to avoid tearing and reduce seams, and to extend molding time.
After determining the mold opening direction of the high-precision plastic mold, select an appropriate parting line to avoid the occurrence of inverted phenomena in the mold opening direction and improve the appearance and performance of the mold.
Adjust the demoulding slope of the high-precision plastic mold properly to avoid damage to the product such as white edges, deformation, and fracture. In the design of products with deep cavity structures, the outer surface slope should be greater than the inner surface slope to ensure that the mold cores do not move, and to obtain uniform product wall thickness, while ensuring material strength and product opening time.
Each different plastic has a certain range of wall thickness, generally 0.54mm. When the wall thickness exceeds 4mm, it will cause problems such as long cooling time and shrinkage, so the product structure should be considered for adjustment. Uneven wall thickness will cause surface shrinkage, air holes, and weld lines. In addition, reasonable use of reinforcement can increase product stiffness and reduce deformation.
These are the issues that need to be paid attention to when designing high-precision plastic mold products. Designing and processing high-precision molds is a highly technical engineering task, so be sure to seek a professional precision injection molding manufacturer.
