What structural issues should be considered in the design of plastic molds?
1. Parting surface: that is, the contact surface layer where the mold cavity and the mold base cooperate with each other when the mold is closed. The choice of its location and method is affected by the appearance and shape of the product, wall thickness, molding method, post-production process, mold type and structure, mold exit method and molding machine structure.
2. Structural components: that is, guide rail sliders, inclined guide columns, straight top blocks, etc. complex mold. The design of structural parts is very important, it is related to the service life of the mold, production cycle, cost and product quality. Therefore, the key structure of complex molds puts forward higher requirements on the comprehensive ability of designers, and strives to pursue better, simpler, more durable and more economical designs.
3. Mold accuracy: avoid sticking, accurate positioning, positioning pins, circlips, etc. The system is related to product appearance quality, mold quality and service life. According to different mold designs, choose different accurate positioning methods. The key to grade manipulation is production and processing. The positioning of the mandrel is mainly considered by the designer, and a more effective and easy-to-adjust positioning method is designed.
4. Pouring system: The safe feeding channel from the injection molding machine nozzle to the middle of the die, including the main channel, the separation channel, the glue inlet and the cold cavity. In particular, the selection of the glue feeding position should be conducive to filling the mold with molten plastic under the condition of excellent fluidity. When the mold is discharged, the solid runners and the cold glue feeding attached to the product are easily removed from the mold. Squirt and eliminate.
5. The shrinkage rate of plastic and various factors that endanger the dimensional accuracy of the product, such as mold manufacturing and installation deviation, mold damage, etc. In addition, when designing the compression mold and injection mold, the matching of the processing technology and the main structural parameters of the molding machine should also be considered. Aided design technology has been widely used in plastic mold design. In addition, in the design process of plastic molds, the standard parts of the mold should also be considered, so that the whole set of molds can achieve better results, and then the plastic molds can be smoothly processed in the injection mold processing stage.
Post time: Apr-15-2022