Locating and Limiting Components in Injection Molds
In injection molds, locating and limiting components play a crucial role in ensuring accurate mold closure, smooth operation, and product quality. Through precise positioning and limiting, these components guarantee that all mold parts remain in their correct positions during the manufacturing process, thereby enabling efficient and high-quality product production.
Functions of Locating Components
Ensuring accurate mold closure: Through precise positioning, it ensures that the moving and stationary halves of the mold align accurately during closing, preventing product defects such as misalignment and dimensional inaccuracies.
Maintaining the relative positions of mold components: Locating components fix all mold components in their correct positions, preventing any displacement during operation.
Improving mold rigidity: By increasing the number of connection points, locating components enhance mold rigidity and reduce deformation during operation.
Common Locating Components
Locating pins and bushings: This is the most common locating method, where precise positioning is achieved through the cooperation of locating pins and bushings.
Locating rings: Locating rings are typically used in larger molds to ensure concentricity.
Dovetail slots: Dovetail slots have a self-locking function, ensuring positioning accuracy, and are often used for slider positioning.
Guideposts and bushings: In addition to locating, guide posts and bushings also provide guidance, ensuring smooth movement of the mold during opening and closing.
Functions of Limiting Components
Limiting mold opening and closing stroke: Prevents excessive opening or closing of the mold, protecting the mold from damage.
Ensuring the movement range of mold components: Restricts the movement range of mold components to prevent them from exceeding the design limits.
Preventing mold interference: Prevents interference between mold components during operation, avoiding mold damage or product quality degradation.
Common Limiting Components
Limit blocks: Limit blocks restrict movement by contacting other components.
Limit pins: Limit pins restrict movement by inserting into holes.
Limiting rings: Limiting rings restrict movement through their annular structure.
Springs: Springs provide a certain amount of restoring force, ensuring that mold components return to their initial positions after operation.
