How to Arrange Cavity Layout for a Multi-Cavity Injection Mold?
The arrangement of multi-cavity products refers to the layout of multiple cavities within a single mold to improve production efficiency and utilization. The arrangement should consider factors such as product shape, mold strength, injection molding machine parameters, and the design of the gating system.
Arrangement Methods
1. Linear Arrangement
Cavities are arranged in a straight line within the mold.
Suitable for elongated or regularly shaped products.
It simplifies the design of the gating system but may result in a larger overall mold size.
2. Matrix Arrangement
Cavities are arranged in a rectangular grid pattern.
Ideal for mass production of small or medium-sized products.
Provides a compact layout with high mold utilization.
3. Circular Arrangement
Cavities are arranged in a circular or ring-shaped pattern.
It is commonly used for products with strong symmetry or where uniform pressure distribution is required.
The gating system design is more complex but achieves better flow balance.
4. Asymmetric Arrangement
Cavities are freely arranged based on mold structure or product requirements.
Suitable for uniquely shaped products or to prevent localized stress concentrations in the mold.
Arrangement Principles
1. Flow Balance
Ensure that molten plastic flows evenly in the gating system with consistent paths and resistance to avoid uneven cavity filling.
2. Mold Strength
Prevent overly dense cavity arrangements that may weaken the mold structure or lead to uneven stress distribution.
3. Injection Machine Compatibility
Ensure that the mold size and total projected cavity area match the molding machine's clamping force and injection capacity.
4. Cooling System Optimization
Arrange cavities to facilitate the design of cooling channels, ensuring uniform product cooling.
5. Product Demolding
Consider the difficulty of implementing demolding mechanisms when determining the arrangement, avoiding issues like product sticking or deformation due to poor layout design.
