Injection molding is an extremely versatile process for producing a wide range of simple or complex plastic parts - economically and with a good finish. Injection molding's efficiency varies by the number of parts you plan to produce
3DM Design specializes in plastic injection mold tool and zinc diecast tool design
We understand that designing products that can be molded and mass manufactured is critical in the design process.
115 Plastic Injection Mould Tooling and Zinc Pressure Diecast tooling have been designed by 3DM Design Tool Designers in the last four years alone
These have included:
Complex partline tooling.
Aluminium short run module tooling for cost effective solutions.
Sliding cores for undercut features of parts.
Hydraulic actuated rams for internal screw thread features in parts.
Thin walled container tooling
Hot-Tip with multi point Manifold tooling.
Angled Lifters and sprung ejectors for undercut features
Blow mold tooling
Metal part insert tooling
Parts from 2 grams to 350 grams
Plastic Injection Molding Notes
You can arrange multiple pieces in one mold by connecting them with small bars ~0.1", however the sub-components must not have widely varying volumes. When the design does not allow for additional structures to improve strength, consider using a stronger material, such as glass fiber filled plastic. Consider specifying a fire retardant material when necessary. Contoured parts warp less than flat parts.
If desired specify the following:
Where to place the gate - the location where plastic is injected - a small rough spot will appear at this location.
Where to place the parting line - the location where the two mold halves meet - a thin line will appear at this location.
What surface finish to use - polished, matte, textured.
Plastic Part Design Guidelines
Use uniform wall thicknesses throughout the part. This will minimize sinking, warping, residual stresses, and improve mold fill and cycle times.
Use generous radius at all corners. The inside corner radius should be a minimum of one material thickness.
Use the least thickness compliant with the process, material, or product design requirements. Using the least wall thickness for the process ensures rapid cooling, short cycle times, and minimum shot weight. All these result in the least possible part cost.
Design parts to facilitate easy withdrawal from the mold by providing draft (taper) in the direction of mold opening or closing.
Use ribs or gussets to improve part stiffness in bending. This avoids the use of thick section to achieve the same, thereby saving on part weight, material costs, and cycle time costs.
