The preparation of the shoe machine equipment before the mold production: take the medium raft, the molding main heel, the upper, and the molding insole for each use.

The height of the back of the shoe last is half shoe last: according to the height of the die and the machining allowance, it is the height of the blank of the die. And the size of the back of the shoe last is taken as a half shoe last.

The height of the half-shoes varies depending on the type of the rear-end pre-former.

Attaching the insole to the half last includes the thickness of the insole when the back is formed on the last, so the thickness of the insole must also be increased on the mold. The length of the formed insole is taken according to the height dimension of the half-shoe, and then it is pasted or nailed to the chassis of the half-shoe, and the necessary finishing is performed to make the two integrated.

Determine the position of the main heel on the half-shoe. Put the main heel on the back of the half-shoe, and draw the contour line of the position. This is the thickening dimension of the rear part during the pre-forming, that is, the main heel. thickness of. Since the thickness of the main heel is a tapered state, it is advantageous to draw the contour line. The half-shoes of the shoe machine equipment are in the shape of a stencil. Because the back sill and the main heel material have a certain elasticity, the shape after the preforming will have a certain amount of deformation, that is, the back sill is larger than the size of the shoe last, so that the back gang The shape after molding is basically the same as that of the shoe last, and the die should be made thinner to compensate for this deformation. The method of making up the amount of deformation is to shrink the upper and lower ends of the half-shoe main heel position, so that the arc of the rear arc becomes smaller; at the position of the two sides of the main heel, from the rear arc to the main Shrink with each side of the end, making the half-shoes gradually smaller and thinner. When shrinking according to the amount of shrinkage, the overall shape of the half-shoes is to be gradual rather than sudden. The amount of shrinkage of the shoe machine equipment is empirical data, which can be appropriately adjusted according to the materials of the main and rear gangs.

Trimming and affixing the half-shoes to the stencil type: according to the shape of the stencil base, electric heating or cooling holes, trimming and subsidizing on the half-shoes, making it a complete stencil shape, with due consideration for cast aluminum The amount of shrinkage of the piece. After being polished and waxed on the outer surface, it is a wood mold.

Casting mold: Casting aluminum molds according to the wood mold. The aluminum die blank after casting shall not have shrinkage of the outer surface and defects of the sand hole, and shall be tempered to eliminate the internal stress.

Machining Die: The order of machining the die is to sand the blank, draw the vertical center line of the die and the horizontal line of the base, machine the plane of the base, draw electric heating holes or cooling holes on the plane of the base, and machine the mounting holes, sanding and polishing. Die surface, print shoe code number and product number. The molding die is designed and manufactured, and the molding die is mostly a rubber material compression molding vulcanization molding process, and the process of manufacturing the molding die is a process of designing a vulcanization mold and a vulcanization molding.