The forming barrel is the main part of the rod technology of the Sawdust briquette machine. The processing specifications of different carbon products are determined by the forming barrel of different sizes. Generally speaking, the selection of forming barrel specifications of sawdust briquette machine is based on the size of the finished product box, the forming barrel now has three types of specifications:
1. 四方形模具（方形）；模具桶由高质量钢制成，高45厘米，宽10厘米；这种模具桶加工的成品为方形规格，方形规格的成品易于放入箱中，其包装稳定性极佳，唯一的不足是空箱的占用率较高，包装成本较高。
2. 六角形的桶；成型桶由特殊高质量钢材制成，高50厘米，宽15厘米；使用这种形状桶的木炭机加工的成品为六角规格；六角形木炭的成品因其独特的多角优势，包装空间小，包装稳定性强，边缘多。角落的工艺美感也受到大多数木炭用户的追捧。
3. Circumferential forming barrel; the forming barrel is also made of high-quality steel, 48CM high and 12cm circumferential diameter; sawdust briquette machine with this type of molding barrel processed by the finished carbon products for circular specifications, circular specifications of the finished carbon products of the packing space occupied very small, but its packing stability is very poor, the use of this type of carbon products. Customers of molding barrels should pay attention to the shock-proof measures after the finished products are packed, so as to avoid the friction caused by gravity extrusion.