For the roller press, it has two types, one is hydraulic pressure, another is mechanical pressure. Structurally speaking, there is no fundamental difference betweenhydraulic pressure briquette making machine and mechanical pressure briquette machine. The working principle is same. While, due to increased the molding pressure, the various components of the ball press must be enhanced. For thehigh pressure briquette machine, the main body will be more compact, the heat treatment of roll skin is more higher. The gear can no longer use ordinary cast steel etc. Some changes of briquette making machine are not directly reflected. For the construction of the machine, thehigh pressure roller press is equipped with hydraulic system, and forced feed system. The mechanical type briquette machine does not have these parts.