Design for Manufacturability
- Quality Manufacturing Starts with Good Design
- Avoid 50% Injection Molding Defects
- Decrease 30% Tooling Rework
- Contract Manufacturer Engineering Service
- Reduce 20% Production Cost
What Desigh for Manufacturability Can Tell You
1. General Description
2. Parting Lines
Examines the location of the parting line (where the two halves of the mold meet).
Parting lines are usually located on the edges of the molded parts. However some lines may located around the middle of the part due to geometry structure.3. Gate Locations
Evaluates the optimal locations for gates (inlets for injecting molten plastic into the mold cavity).
The injection molding gate in the DFM report isn't the only option. You can inform us if it affects cosmetics or functionality. The gate type determines the way to produce and even the mass production cost.
4. Lifters and Sliders
Assesses the need for and placement of lifters (movable mold components) and sliders (side-action components).
Lifter and silder are injection mold components to create undercuts.
5. Ejector Pin Marks
Analyzes the placement of ejector pins used to remove the molded part from the mold.
The ejector marks can not be removed due to the process of injection molding.
6. Rib and Wall thickness
Checks for uniform wall and rib thicknesses to prevent warping or other defects.
The thickness of the ribs should be about 60% of the wall thickness, avoid uneven wall thickness, avoid thin wall area as much as possible.7. Draft Angle
Evaluates draft angles (tapers) to ensure injection molded part easy release from mold cavity.
Sometimes it will slightly change the design of the original product.
8. Problems & Solutions
9. Surface Finish Requirements
Specifications for the desired surface finish, which can have multiple finishes on a single part. Also define if there is any engraving or raised areas.
Normally we suggest determine texture or polish surface before machining the molds as the draft may not machined again as specified texture.
Mold Flow Analysis is a simulation process used to predict how molten plastic will fill a mold, helping us identify potential issues such as warpage, sink marks, short shots, weld lines, air traps, and uneven wall thickness before production begins. A well-prepared DFM report helps identify and prevent a range of potential defects before the mold is built.
Our DFM report covers key design checks such as wall thickness, draft angles, undercuts, and sharp corners. It also includes suggestions for gate and ejector pin locations, mold structure recommendations, and—if needed—mold flow simulation results. We highlight possible risks and offer design improvements to enhance manufacturability, part quality, and cost-efficiency.
Yes, we don’t just point out potential issues—we provide actionable design suggestions to help you resolve them. Our team will work with you to refine your part for smoother production and better performance.
DFM helps you avoid costly rework by ensuring your part is mold-ready from the start. By addressing potential design issues early—like parting line conflicts, unnecessary undercuts, or complex geometry—we can simplify the mold design, shorten tooling time, and reduce manufacturing complexity. This leads to lower overall mold cost and faster turnaround.
Jiangzhi Contact Manufacturer Capabilities
- Custom Automation Solutions
- Medium/High Volume Production
- Finished Retail Packaging
