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Why Do Plastic Injection Molding Manufacturers Use Inserts?

Plastic injection molding manufacturers widely use mold inserts in the processing of injection molds, particularly in areas such as the front mold, back mold, sliders, and angled ejectors. So, why do these manufacturers choose to use inserts in injection mold processing?

The main reasons are:

  1. Material Savings: Injection molds typically use fixed-shape steel, with the amount of material required being determined by the mold’s height. If certain parts of the mold vary in height, inserts can be used to lower specific areas, reducing material waste. Additionally, common modifications can be easily addressed by replacing inserts, making future mold changes convenient and efficient.

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Improved Ventilation: Proper ventilation is a crucial factor in the injection molding process. Poor ventilation can lead to trapped air in the mold cavity, especially in deeper structures, resulting in defects such as bubbles, shrinkage, incomplete filling, or discoloration. By adding inserts in areas that require ventilation and utilizing the gaps between the inserts, ventilation can be significantly improved.

In conclusion, mold inserts in injection molding not only help reduce material waste but also enhance product quality, making them widely adopted in the industry.

DAYIN Plastic Products Co., Ltd. is a high-tech enterprise dedicated to product research, design, manufacturing, and sales services, offering one-stop manufacturing solutions. Established in 1989, the company specializes in mold making, injection molding, post-processing, and electronic assembly. In addition to OEM services, we also develop our own products for private label manufacturing. With a 50,000-square-meter production facility, 30 years of mold development experience, over 50 R&D staff, and more than 100 injection molding machines, DAYIN is a leader in the field.