The sand core positioning structure adopted on the cylinder block lower core fixture is also diverse in production practice. Many factories provide the lower core fixture with accuracy and reliability as much as possible. Positioning blocks (or fast limit) are set around the “overall sand core” to prevent the displacement and deviation of the cylinder blocksand core after the lower core fixture leaves the core assembly platform. This has a certain positive effect on the lower core clamp with compressed air as the power source.
As for the cylinder block sand casting sand core positioning block on the lower core clamp, ZHY casting believes that the most important thing is to determine the height position of the cylinder block sand casting sand core in the mold cavity, especially the limit block, which should be an indispensable structure of the lower core clamp.
The production practice shows that there is no lower core fixture with such a structure. After the whole set of cylinder block is lowered into the mold cavity, the sand core of cylinder block sand casting is often difficult to be in place. Tools are still needed to beat the sand core of cylinder block sand casting and check it with sample plate, which increases the complexity of the process. Therefore, on the lower core clamp, the height limit block of the complete set of cylinder block sand casting sand core of the cylinder block, that is, the positioning block controlling the height size of the complete set of cylinder blocksand core in the mold cavity, is an important process structure of the positioning structure of the cylinder block sand casting sand core of the lower core clamp, which must be paid special attention to by the relevant process personnel and mold tooling designers.