the mold of the knight / 国际象棋马模具

This is a mold designed to recycle 3D printing waste (PLA) into chess knights. It can process 40g of plastic at a time. While PETG can be used to print the mold, its lifespan as a mold is limited. For long-term use, it is recommended to print the mold using high-temperature resistant carbon fiber reinforced materials (such as PET-CF, PA-CF, PPA-CF). I have tested PPA-CF material, and it is very suitable for use as an injection mold, allowing for long-term use without thermal deformation. However, it is expensive.

Tools required: oven, 3M respirator, silicone baking tray, 4-inch G-clamps (3), M4 25mm screw (1, as a demolding ejector pin), flat screwdriver, hammer.

Process:

1. Place 40g of PLA in an oven and heat at 210°C for about 15 minutes.
2. Secure the mold with G-clamps.
3. Pour the melted plastic into the mold, insert the piston, and press down firmly on the piston (for about 30 seconds). (The plastic must be melted to a slightly viscous state for easy molding; otherwise, the melted plastic cannot fully fill the mold.)
4. After about 20 minutes, use a flat screwdriver to open the mold and use the M4 screw as an ejector pin to demold.
5. Remove burrs and sand the bottom with sandpaper.

这是一个回收3D打印废料（PLA）制作国际象棋马的模具。它一次可以回收40g塑料。可以使用PETG打印模具，但PETG作为模具使用的寿命有限。如果想长时间使用模具，建议使用耐高温的碳纤维增强材料（如PET-CF，PA-CF，PPA-CF等）打印，我测试过PPA-CF材料，它非常适合作为注塑模具，可以长期使用而不产生热变形，但是价格贵。

需要的工具：烤箱，3M防毒面罩，硅胶烤盘，4英寸G型夹（3个），M4 25mm螺丝（1个，作为脱模顶针），平起子，锤子。

制作流程：

1，把40克PLA，放入烤箱，210℃加热约15分钟。

2，把模具用G型夹锁紧。

3，把熔化的塑料放入模具，插入活塞，并用力踩下活塞（约30秒）。（塑料一定要充分熔化到有点粘稠的状态，这样易于成型，否则熔化的塑料不能充分填满模具。）

4，约20分钟后，用平起子打开模具，并用M4螺丝作为顶针脱模。

5，去除毛边，用砂纸打磨底部。