The Thimble Is a Member Of The Injection Mold

  •    Top needles are critical for making parts. They are an integral part of the ejector system (such as the ejector sleeve) in the injection mold, which determines the final result of the product during the injection molding process.

      Injection molding is a manufacturing process that involves injecting molten plastic into a metal mold to take the shape of the mold. Therefore, ejector injection molding involves removing the finished part from the mold.

      There are many kinds of ejector pins used in product manufacturing, such as straight ejector pins and shoulder ejector pins. Below are the most common types you'll find best suited for the process.

      hard thimble

    These thimbles are heat-treated to ensure consistent hardness across the diameter of the thimble. Through hard pins can withstand operating temperatures up to 200°C and are best suited for plastic ejection systems in molds.

      case hardened thimble

    Also known as Nitride H13 pins, they are harder than straight-through hard pins and are suitable for die casting ejector systems in molds. Case hardened pins are nitrided to 65 – 70 HRC and can withstand temperatures above 200°C.

      black thimble

    Since Nitride H13 thimbles cannot be used at operating temperatures above 600°C, the manufacturer developed these thimbles. Black thimbles are painted with a black finish, are self-lubricating, and withstand high temperatures up to 1000°C. It is an expensive ejector pin for metal ejection systems in automotive molds.

    Taizhou Huangyan Jinhong Plastic Mould Parts Co., Ltd. is a manufacturer of injection plastic mold from China. The enterprise specializes in the production and sales of plastic compression springs, positioning components, guide bush and other products. The company can provide special products.