1、 Basic requirements for die casting die design.


1) The die structure should adapt to the forming characteristics of die-casting alloy materials. When designing the die, it is one of the key measures to obtain high quality die castings to fully understand the forming characteristics of the die casting materials used and try to meet the requirements.


2) The mold structure shall match with the forming equipment.


The die-casting die must be installed on the corresponding die-casting machine for production. Whether the forming equipment is reasonably selected directly affects the quality of the die structure design. Therefore, when designing the die, it is necessary to have a comprehensive understanding of the relevant technical parameters of the selected die-casting machine to meet the matching relationship between them.


3) Adopt standardized parts, shorten design and manufacturing cycle and reduce cost


The manufacturing of mold structure parts and formed parts belongs to single piece or small batch production, which involves many processes, so the cycle is long. The use of standardized parts can effectively reduce the design and manufacturing workload, shorten the production preparation time and reduce the mold manufacturing cost.


4) Reasonable structure optimization, reliable quality and convenient operation


When designing the die-casting die, try to optimize the die structure reasonably, ensure reliable quality and convenient operation. Especially for those complex formed parts, in addition to correctly determining its shape, size and quality requirements, we should also comprehensively consider the adaptability, feasibility and economy of the processing method.


5) Be good at using technical data and reasonably select empirical design data

Die casting die design is a complex and meticulous work. From the analysis of the overall scheme to the completion of all technical design, it often needs to be gradually improved through the process of calculation, drawing, modification and so on. Therefore, it is necessary to be good at mastering and using various technical data and design manuals, reasonably select the existing experience design data, and creatively design, so as to speed up the design progress and improve the design quality. During the design process, the problems considered and the calculation process shall be fully recorded for inspection, verification, modification and arrangement. Due to the wide variety of die castings, the structural characteristics and requirements of dies are also different. The design process of die casting dies will vary according to the technical proficiency and habits of designers.

3、 Runner


1. On the premise of ensuring the forming quality, all molds shall try to shorten the channel stroke and reduce the cross-sectional area as much as possible. The cold material hole is 1.5 times the channel diameter. All channels are required to have cold material holes, such as the lower part of the pump nozzle, the end of the channel, the lower part of the fine nozzle rubber inlet, etc.


2. All fine nozzle molds, mold runner and nozzle hook must be polished. Ensure that the glue inlet is smooth, reduce the injection pressure and no residue is left on the product.


3. The flow passage section of the large die shall be made into a circle or an upper and lower ellipse, that is, the height dimension shall be 0.5-1.0 larger than the width dimension, and the front and rear shall be aligned. There shall be no dislocation during polishing. Under special circumstances, the single side flow passage shall be trapezoidal.


4. The feeding port and water inlet shall not be at the obvious appearance. The strength of the glue inlet point of the electroplating product shall be ensured. The contact between the glue inlet point of the large water port and the product shall be a knife edge surface with the smallest cross-sectional area, so as to ensure that no residue is left on the product after removal.


5. The thimble or crochet position of the submerged rubber inlet shall be at a certain distance from the rubber inlet of the parting surface, about 1.5 times the diameter of the flow channel, so as to ensure the toughness of the submerged rubber inlet. The submerged gate must be polished.


6. The glue inlet point of the large water inlet of the gear die is at the bottom of the tooth surface Φ 1.0 milling cutter aligns the cusp of one of the teeth, milling depth 0.5-0.6, width 1.2, depth 1.5, AB plate insert. When the through-hole is inserted and processed together, if the through-hole is not inserted, the centring rod shall be used repeatedly to ensure the concentricity accuracy. When inserting the rear die cylinder needle into the front die, a drill nozzle smaller than the machining hole diameter shall be used for roughening, so as to facilitate the discharge machining of copper.