Mold structure

An improved mold structure, comprising:

• a first mold base, a second mold base and two controllers, the first mold base and the second mold base are operably aligned, when the first mold base and the second mold base are in an aligned state, a mold cavity is jointly framed, and the improved mold structure further comprises a first gas passage, a second gas passage, a first mold core and a second mold core;
• the first mold base is provided with a runner, one end of the runner is connected to a material tube, and the other end thereof is connected to the mold cavity;
• one side of the first mold core is a part of the mold cavity, a first vent pipeline is provided inside the first mold core, and comprises at least one first main pipeline and a plurality of first auxiliary pipelines, the first main pipeline is connected to the first gas passage, each of the first auxiliary pipelines is arranged at intervals, both ends of each of the first auxiliary pipelines are respectively connected to the first main pipeline and the mold cavity, the first mold core is made of porous material, and the porous material makes the first mold core full of plural pores;
• one side of the second mold core is a part of the mold cavity, a second vent pipeline is provided inside the second mold core, and comprises at least one second main pipeline and a plurality of second auxiliary pipelines, the second main pipeline is connected to the second gas passage, each of the second auxiliary pipelines is arranged at intervals, both ends of each of the second auxiliary pipelines are respectively connected to the second main pipeline and the mold cavity, the second mold core is made of porous material, and the porous material makes the second mold core full of plural pores;
• and
• the two controllers are respectively connected to the first gas passage and the second gas passage, so as to control gas to enter the mold cavity from the first gas passage and the second gas passage through the first vent pipeline and the second vent pipeline, or to control the gas in the mold cavity to be discharged through the first gas passage and the second gas passage from the first vent pipeline and the second vent pipeline such that an area with the first mold core in the mold cavity and an area with the second mold core in the mold cavity respectively reach a predetermined pressure value, and when a raw material of the material tube enters the mold cavity, the two controllers are used to synchronously adjust intake or exhaust to change the pressure value in the mold cavity, thereby controlling a flow direction of the raw material.