Gypsum mold is a traditional ceramic grouting mold. Due to its low heat resistance, large surface porosity, easy blockage and low flexural strength, it is not used regularly for high pressure grouting. Therefore, a hot press grouting mold has recently been invented. The structure is novel and the design is reasonable. The Si3N4-BN ceramic material is used as the main body of the mold, and a porous protective layer formed of aluminum cement durable material is adhered on the outer periphery thereof, and a varnish resin seal is applied on the outer periphery and the bottom surface of the protective layer. The layer is constructed by being placed in a pressure-resistant container having a gas jet port.
The hot press grouting mold comprises a left mold, a right mold and a mold core, and the left mold and the right mold form a mold body, and the mold core is located in the mold body, which is a hollow cylinder, and the outer wall is provided with a hollow annular protrusion and an annular convex shape. The lower surface is provided with a plurality of feeding ports, and a plurality of control members corresponding to the annular protrusions are rotatably connected inside the core.
The control part of the hot press grouting mold comprises a hollow rotating column and a circular baffle. The upper and lower ends of the rotating column are all open, and the input port between the side wall of the rotating column and the side wall of the core is adjacent to the two rotations. The column is also an input port, and the diameter of the outer circumference of the baffle is the same as the diameter of the outer circumference of the annular protrusion, and the baffle is provided with a feeding port. It can solve the problem that when the green body is manufactured by using the convex core, the cavity is formed in the lower portion of the convex portion due to the shrinkage of the slurry, thereby causing the problem that the grain on the through hole of the blank is not perfect.