What is a method to reduce the release resistance of the ejector pin? Countermeasures through surface treatment.

Solve ejector pin troubles with surface treatment technology! Easy demolding even with soft resins that are less likely to stick.

■What is an ejector pin? Also known as a push-out pin, it is a pin incorporated into a mold to push out and remove molded products from the mold. Ejector pins are used in most injection molding molds and come in various shapes, materials, and sizes. It is important to choose the appropriate pin for demolding based on combinations of shapes such as round pins, square pins, and middle flange pins, as well as materials like SKD-61 and SKH-51. ■Methods to reduce the demolding resistance of ejector pins To reduce the demolding resistance of ejector pins, methods include mold design, pin arrangement and shape selection, and reviewing molding conditions. However, in cases of materials that tend to stick or soft resins, sticking can lead to demolding failures. In such cases, it is necessary to consider utilizing surface treatment technologies. ■Surface treatments to improve the demoldability of ejector pins Ejector pins need to protrude from the mold, so they require not only demoldability but also wear resistance and dimensional stability. Yoshida SKT's Bicoat has a proven track record of achieving smooth demolding when applied to ejector pins. For more details on Bicoat, please download the catalog and check.

basic information

In the molding process, there was a request to shorten the molding time to accommodate increased production. When attempting to demold the resin from the mold in a shorter time than usual, a problem occurred where the resin had not yet sufficiently hardened, causing the ejector pins to get stuck and unable to be removed. As a result, a coating to improve the demolding of the resin was considered. "Bycoat" has excellent release properties and allows for smooth demolding even with soft resin without sticking. It also offers good dimensional accuracy, making it suitable for coatings on items with strict dimensional tolerances like molds. Furthermore, its high hardness allows it to be used in environments with high pressure, similar to molds, successfully improving production efficiency and increasing the output of parts. *Please refer to the booklet for case studies. Feel free to contact us with any inquiries.*