Plastic hot runner mold design and manufacturing
author: Universe plastic
2024-06-04
Hot runner mold
Hot runner mold is a type of mold that is very suitable for mass manufacturing of plastic parts. By equipping the mold with a heating system, the molten plastic can remain flowing in a liquid state in the runner, thereby improving production efficiency and the surface quality of plastic products.
Design core
The core of designing a hot runner mold is its unique hot runner system, which includes: hot runner controller, hot runner mandrel, hot runner throat and hot runner needle valve. With the cooperation of these components, it is possible to ensure that the molten plastic can flow and fill smoothly after entering the runner from the feed port of the mold.
Other design content
1. Design the feed port: Determine the position of the feed port according to the structure and production requirements of the plastic parts. For complex plastic parts, CAE can be used to simulate the flow of molten plastic in the mold cavity to determine the optimal feed inlet position.
2. Select the nozzle head: The type of nozzle head depends on the plastic part material, product characteristics and manufacturing cost. For example, for materials that are easy to draw, you can choose a nozzle head with a torpedo core.
3. Number of mold cavities: Based on the production volume of plastic parts and the capacity of the injection molding machine, determine the number of cavities to be designed for the mold.
4. Number of hot nozzles: The number of hot nozzles is determined based on the position of the feed port and the number of mold cavities.
5. Hot nozzle size: Determine the radial size of the hot nozzle based on the weight of the plastic part and the number of hot nozzles.
6. Mold base structural size: The final structural size of the mold base is determined according to the cavity layout size and fixed template size.
7. Hot runner fixed plate: Design the fixed plate based on the manifold plate, and arrange the power cord lead trough on the plate. At the same time, design sufficient cooling water loops near the hot runner manifold plate, hot nozzle, and nozzle head.
Design considerations
1. Selection of heating system: Hot runner system can be divided into internal heating system, external heating system and system combining the two.
2. Temperature control: Temperature control is a very important link in hot runner design. It is necessary to choose the appropriate temperature sensor installation location to ensure accurate temperature control.
3. Material selection: According to the type of polymer being processed, appropriate materials and coatings are selected to prevent corrosion and wear of the material.
4. Service level: Service level is also a factor that needs to be considered when choosing a hot runner manufacturer, including the system's delivery speed and rapid response capabilities.
Manufacturing steps
1. Material selection: According to the designed mold material, select high-quality materials for preparation and processing.
2. CNC processing: All parts of the designed mold are processed through CNC machine tools and EDM equipment.
3. Assembling the mold: In addition to the normal assembly of mold parts, the heating elements, cooling water channels, nozzles, manifolds and other components in the hot runner system also need to be accurately integrated into the mold to ensure the uniformity of the plastic in the runner system. Flow and cool.
4. Mold trial and optimization: Install the assembled mold on the corresponding injection molding machine equipment during design. After testing various systems of the mold,
5. Carry out injection molding production and process and optimize unqualified modules until delivery requirements are met.
6. After-sales maintenance: perform anti-rust treatment on all parts of the mold and lubricate the moving parts to ensure the performance of the mold.
Professional service provider
The design and manufacturing of plastic hot runner molds is a highly specialized and technology-intensive process, which strictly requires designers and manufacturers to have deep professional knowledge and skills.
Universe Plastic is a professional team in hot runner mold design and manufacturing, and can provide a variety of excellent and cost-effective solutions. We have provided hot runner mold manufacturing services to customers in more than 30 countries, you can contact us at any time. As technology advances and market demand changes, our manufacturing technology and after-sales services will continue to develop and improve.
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