1. The design of the runner of the feed inlet is focused on

The feed port should be located in the thicker part of the product to ensure smooth and complete mold filling, and should be located where it does not affect the appearance and function of the product, the tie rod can be located at the edge or bottom, in the cold cavity near the gate In order to facilitate the demoulding of runners, large or flat products, it is recommended to use multi-point feeding to prevent product warpage and material shortage. Its position should be selected in the shortest place during the plastic filling process to reduce pressure loss, facilitate mold exhaust, and avoid opening the gate near the slender core, so as to prevent material flow from directly impacting the core, resulting in deformation, dislocation or bending.

The size of the gate is determined by the size, geometry, structure and plastic type of the product, and can be modified according to the mold test conditions. Through mold flow analysis or experience, it can be judged whether the product seam line caused by the gate position affects the appearance and function of the product. , which can be solved by increasing the cold material cavity. When a mold has multiple cavities, a symmetrical casting method is used for the same product.

2. Precautions for mold design

1. When developing products or trial-producing new products, some users often only pay attention to the initial research and development of products, but ignore the communication with the mold manufacturing unit. The finalized design will not be modified due to the difficulty of parts processing, so that the mold maker can prepare the design in advance to prevent inadvertent consideration in a hurry and affect the construction period.

2. According to the different requirements of physical and chemical properties, parts materials, dimensional accuracy, mechanical strength, surface finish, service life and economy, different types of molds are selected for forming, and there are strict requirements for mold materials and forming processes. High-precision molds It needs to be processed by high-precision CNC machine tools. Some parts have special requirements in the forming process. The mold should adopt advanced technologies such as gas-assisted forming, hot runner, and nitrogen bottle.

3. Generally, large-scale stamping dies should consider whether the machine tool has a blank holder, multi-station progressive die, etc. When choosing a partner, you must understand its processing capabilities, not just hardware equipment, but also management level, processing experience and Technical strength, for the same set of molds, the quotations of different manufacturers are sometimes very different. Users must start from their own needs and comprehensively measure.

4. With qualified molds, it may not be possible to produce qualified products in batches. This is mainly related to the selection of machine tools, the forming process and the technical quality of operators. There are good molds and good molding processes. Through one-stop cooperation, and try to avoid multi-cooperation.