In the processing of thread molds at Dongguan plastic manufacturing factories, threads are generally categorized into internal and external threads. These threads commonly appear as standard or rectangular threads in injection-molded products. Depending on the application, factories can flexibly choose the appropriate thread type. For instance, in high-strength applications, sawtooth threads are ideal, while multi-start round threads are favored in everyday items like bottles and caps due to their ability to achieve a tight fit in a short time.
For injection-molded products, Dongguan plastic manufacturing factories adopt the following strategies:
- Processing Technology
- For plastic products with lower precision requirements, the factory uses a forced thread removal structure (non-rotational). This mold structure is simple and involves first retracting the core rod from the silicone rubber thread core, allowing the thread core enough space to contract before the product is forcibly ejected. However, it’s important to note that the silicone rubber thread core’s lifespan is relatively short, making this method more suitable for small-batch production.
- For plastic products requiring automatic thread removal, a non-forced thread removal structure (rotational) is used, which can be implemented in various ways.
- Design Strategies
- Before designing a thread mold, it is essential to clarify the specific requirements of the product, including key details such as the outer diameter of the thread, pitch, thread length, as well as thread specifications, direction, and number of starts. These factors will significantly influence the mold design process.
- During the design process, the basic mold structure must be considered, including components such as the mold base, positioning pins, guide pillars, and plates to ensure the mold’s strength and stability. The core cavity design should closely align with the product’s size and shape, taking into account moldability, venting performance, and cooling efficiency, all to ensure the final product’s quality and performance.
DAYIN Plastic Products Co., Ltd. specializes in home appliance mold manufacturing and offers OEM/ODM services. As a comprehensive solution provider integrating R&D and manufacturing, DAYIN’s self-developed products include robotic vacuum cleaners, plastic tableware, and electronic dartboards. With 30 years of mold development experience, over 50 R&D personnel, and more than 100 injection molding machines, we are committed to delivering high-quality manufacturing services and creating value for our customers.