What are the common forms of the ejection mechanism of the connector injection mold?

2025-10-24 13:44:25

The ejection mechanism of the connector injection mold is an important part of the mold design, and its function is to smoothly push out the molded connector products from the mold cavity. The following are some common forms of ejection mechanisms: 1. Push rod ejection mechanism Structural principle: The push rod ejection mechanism is the most common 1 ejection form, which is usually composed of a push rod, a push rod fixing plate, a push plate and a reset rod. The push rod is generally installed on the core or cavity plate of the mold. When the mold opening action is completed, the ejection device of the injection molding machine pushes the push plate, and the push plate drives the push rod fixing plate to move the push rod forward, so that the product is ejected from the mold. Applicable scene: suitable for connector products of various shapes and structures, eSPECIALly for products with simple shapes and small demoulding resistance, such as small sheet connectors and cylindrical connectors, the push rod ejection mechanism can quickly and effectively complete the ejection action. Advantages: simple structure, convenient manufacturing, reliable ejection action, can provide greater ejection force, and the position and number of push rods can be flexibly arranged according to the structure and demoulding requirements of the product. Disadvantages: The contact area between the push rod and the product is relatively small. For some thin-walled, fragile or high-surface products, top marks may be generated at the ejection site, which affects the appearance quality of the product. 2. Pusher tube ejection mechanism Structure principle: push tube ejection mechanism is mainly composed of push tube, push plate, push rod fixing plate, etc. The push tube is sleeved on the core or punch. When the mold is opened, the push plate pushes the push tube, and the push tube moves along the outer wall of the core or punch to push the product out of the core. Application scenarios: Commonly used in connector products with a center hole or ring structure, such as circular connectors, connectors with shaft structures, etc. Advantages: the contact area between the push tube and the product is large, and the ejection force is uniform, which can avoid deformation or damage of the product during the ejection process, and is especially suitable for the ejection of thin-walled annular products. Disadvantages: The machining accuracy of the push tube is required to be high, and the fit gap between the push tube and the core needs to be considered in the design of the mold structure to prevent interference during the ejection process. 3. Pusher plate ejection mechanism Structure principle: push plate ejection mechanism is composed of push plate, reset rod, etc. The push plate is located at the bottom of the cavity of the mold. When the mold is opened, the ejection device of the injection molding machine pushes the push plate to move upward as a whole and push the product out of the cavity. Application scenario: suitable for some large, flat or thin-walled connector products, such as rectangular connectors, multi-pin connectors, etc. These products require a large ejection area and uniform ejection force during demoulding. Advantages: The contact area between the push plate and the product is large, and the ejection is stable, which can effectively avoid the deformation and cracking of the product during the ejection process. Especially for some products with high surface quality requirements, the push plate ejection mechanism can ensure The appearance integrity of the product. Disadvantages: The mold structure of the push plate ejection mechanism is relatively complicated, and enough space needs to be set in the mold to install the push plate and related guiding devices, which increases the cost and manufacturing difficulty of the mold. 4. Pneumatic ejection mechanism Structure principle: pneumatic ejection mechanism is the use of compressed air pressure to achieve the product of the top. Air holes are set on the surface of the cavity or core of the mold. When the mold is opened, compressed air is introduced into the air holes, so that the compressed air forms an air cushion between the product and the mold cavity, thereby blowing the product out of the mold. Applicable scenarios: suitable for some high-precision, thin-walled, easily deformable connector products, as well as products with extremely high surface quality requirements, such as miniature connectors, optical connectors, etc. Advantages: The ejection process is soft, will not cause mechanical damage to the product, and can effectively protect the accuracy and surface quality of the product. At the same time, the response speed of the pneumatic ejection mechanism is fast, which can improve the production efficiency. Disadvantages: It needs to be equipped with a special compressed air supply system, and the sealing performance of the mold is higher, otherwise it will affect the ejection effect. 5. Hydraulic ejection mechanism Structure principle: The hydraulic ejection mechanism provides power through the hydraulic system to achieve the ejection action. A hydraulic cylinder is set in the mold. When the product needs to be ejected, the hydraulic system injects high-pressure oil into the cylinder to push the piston to move, thereby driving the ejection element to ejector the product. Applicable scenarios: Suitable for large, heavy-duty or high-precision connector molds, such as automotive connector molds, aerospace connector molds, etc. Advantages: The hydraulic ejection mechanism can provide large ejection force and precise ejection control, and the ejection speed and stroke can be flexibly adjusted according to needs, which can meet the ejection requirements of different products. Disadvantages: Need to be equipped with a special hydraulic system, increase the cost of equipment and maintenance difficulties.