When designing an Armchair Mould, we must check its stackability. And you also need to consider the possibility of deformation of the chair molding. When designing a plastic chair, we must consider weight and strength. You can make the bottom area strong enough by adding more ribs. But what about the legs, backrest and armrest area? Therefore, you need to calculate or analyze the force in each area. In order to make the lightweight chair strong enough, you can choose a very low MFI PP material. But in this way, you need to make the mold very strong, and you also need to ensure that injection filling is possible, because you are using MFI 4 or Max materials.

 Manual work on the parting line is also one of the reasons for uneven wall thickness. Of course, most of the reasons are the 3D design of the plastic chair and the poor polishing of the cavity and core. Therefore, when we start designing plastic chairs, we must consider the wall thickness. After some time, we need to increase the thickness of some areas to ensure that the chair is strong enough. But we must seriously consider it when needed. Due to the uneven thickness, the injection will not be balanced and the cooling time will also be uneven. This will affect the injection speed and cause shrinkage marks. If the CNC milling is too rough, you will never get a chair with uniform thickness.

In order to prevent your chair mold cavity and core from being rusted by plastic materials, you need to ensure that the steel is high chromium. If you will use some recycled material for injection, your chair mold needs to be hard chrome plated. Otherwise, you need to polish from time to time.

TAIZHOU HUANGYAN SHINE MOULD CO., LTD. is one of the leading suppliers of Chinese plastic mold in the southeast of China. SHINE MOLD focuses on the manufacture of household molds, plastic furniture moulds, automobile moulds and Basket Mould. If you have ideas about molds. You can contact us in time.