Plastic parts manufacturers utilize various forms of injection molding, including the following:
1. Secondary Molding Method
As mentioned, this method involves two steps: first creating a wool ring and then forming the yarn tube. While it simplifies the mold manufacturing process, the substantial plastic waste is a notable drawback.
2. One-Time Molding Method
This method can be further divided into two types:
(1) Inserting the Spindle Hole Core Method
In this approach, the yarn tube is initially injected on the molding machine, followed by post-processing to insert a spindle hole core made from bakelite or other resins. This method demands high mold processing technology and involves a complex process with numerous types of processing equipment and additional post-processing steps. Although this method results in a lack of integrity in the tube, it typically achieves a higher amplitude pass rate.
(2) Tube Integral Molding Method
This method allows for the complete injection of a molded tube in one step. Afterward, only the gate needs to be cut, along with minimal repair work. This method requires advanced mold manufacturing and injection molding technologies, along with various types of processing equipment. While it is challenging to improve the amplitude pass rate, the tube produced is integral and requires fewer processing steps.
Conclusion
In summary, plastic parts manufacturers can choose from different injection molding methods based on their production needs and efficiency goals. The secondary molding method offers simplicity, while the one-time molding method provides options for enhanced integrity and reduced processing steps. Each method has its advantages and limitations, making it essential for manufacturers to select the most suitable approach for their specific applications.
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