Design Of Investment Casting Mold For Brother Sewing Machine Hook Case

Situation of Brother Sewing Machine Hook Cases

First: The sharp part of the product is easy to be cold, and the water is not enough
Second: The problem of making internal step abrasive tools (the customer requires to make internal steps)
Third: the uniform shrinkage of the product as a whole

The purpose of the blue overall core pulling is to effectively ensure that the four cores on the outer steps are effectively taken out.

The middle cylinder is directly the surface of the bottom of the product

The thickness of this cylinder is the key core for the effective extraction of the four movable cores of the step

It is also the first step to get the wax

The second layer: effectively locate the core, so that the surface area of the four movable cores of the steps reaches a horizontal line

The third layer: control the positioning of the four cores, so that the effective position of the core is always where it should be

When all the cores are taken out, take off the bottom plate, the bottom plate and the yellow cavity are the demoulding device

There are two demoulding devices in the shape of a half-moon at both ends of the circle. This design effectively makes the product cool evenly after the molten steel is cooled, ensuring a higher dimensional tolerance of the product

Another point is that the half-moon nozzle on one side is facing the sharp part of the product. When pouring molten steel, it can quickly make the molten steel reach here at the first time, avoiding the phenomenon of cold shut and insufficient pouring.

The fixed plate of the second layer and the blue ring are together, the second layer is assembled first, the position of the ring ensures that the four movable cores are on the same level

After the second layer is installed, assemble four movable cores. After assembling, use positioning to keep the positions of the four cores unchanged to ensure the product structure

Then combine with the third layer of product structure position layer for the next wax injection