Combined injection head

The utility model provides a combined type injection head, which relates to the injection field of die-casting machines, and comprises a plunger head, a fixed pipe, a sleeve, a connecting pipe, a mounting pipe and a push rod connecting piece, one side of the plunger head and the fixed pipe are integrally formed, the sleeve is sleeved on the fixed pipe, one side of the fixed pipe is detachably provided with the connecting pipe, and the connecting pipe is detachably provided with the push rod connecting piece. The connecting pipe and the fixing pipe are connected and then limit and fix the sleeve, a mounting pipe is detachably mounted on one side of the connecting pipe, one side of the mounting pipe is fixedly connected with the push rod connecting piece, and a lubricating oil cavity is formed in the mounting pipe; according to the combined type injection head, a traditional integrated injection head is arranged to be a combined type, when the injection head works, the sleeve is in contact with the inner wall o