ข่าว บริษัท เกี่ยวกับ Tooling, DFM, and Mold Engineering

A mold does much more than shape plastic. It also affects filling, cooling, cycle time, and part size. For medical parts, mold design needs to be done carefully from the beginning.

The key question is simple: can this part be molded in a stable and practical way? To answer that, you need to look at wall thickness, draft angle, gate position, parting line, venting, ejection, cooling, and material flow.

If these points are not handled well, problems will show up later in production. You may see short shots, flash, warpage, sink marks, or unstable dimensions.

A good mold should not only make parts. It should make good parts again and again, without needing very narrow machine settings. That is especially important in medical molding, where stable production matters a lot.

DFM Helps Find Problems Early

DFM means design for manufacturability. In simple words, it means checking whether the part design is easy to mold before the tool is made.

This step is very important because it helps find problems early. For example, big wall thickness changes may cause sink marks or voids. Not enough draft may make the part hard to eject. The wrong gate location may cause weld lines or weak areas. An unbalanced runner may make cavity-to-cavity quality unstable.

Some features may look fine on a drawing, but become difficult during real molding. That is why DFM is useful. It helps connect part design with actual molding conditions.

A good DFM review can reduce trial-and-error, avoid tooling changes later, and make the project move more smoothly.

Insert molding is used when metal parts or other components need to be molded together with plastic. This is common in medical products that need extra strength, conductivity, or a more stable assembly.

It can help reduce assembly steps, improve position accuracy, and lower part count. In some cases, it also makes the product stronger and more compact.

But insert molding is not easy work. The insert must be placed correctly. The molding process must stay stable. The bond between the insert and plastic also needs to be checked carefully.

Besides insert molding, some medical projects also use overmolding, micro molding, or multi-material molding. These methods are useful for soft-touch areas, sealing features, very small parts, or products with more than one material.