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How to repair the defective parts of the shell core machine?

Author:球盟会铸造Visits:362 Time:2023-02-10

The shell core machine is a kind of equipment that uses the hot core box technology to make the coated sand shell core. Its working process is completed at the same time as sand filling and compaction, and it is immediately hardened in the hot core box, reducing labor intensity, flexible, portable and easy to master. With electric heating, the temperature can be automatically controlled, and the workplace is easy to keep clean, creating conditions for the mechanization and automation of the core making process. The production cycle of sand cores for casting is only 10 to tens of seconds. The size and surface of the core manufactured by the core shooter are smooth. Now shell and core machines are widely used in the casting machinery industry.


How to repair the defects of shell core machine?


The production of shell and core machine has its own characteristics, that is, due to the different shapes of shell and core, the requirements of some elements in the shell and core production operation have been adjusted accordingly; The operator has a high level of sand production and crusting technology.


Due to the influence of many factors in operation and the function of domestic shell and core machine. The shell cores produced often have uneven sand hanging on the inside. Some mackerel shells are too thin, and the appearance (especially the shuttle angle) is incomplete and serious, which makes the shell core batch invalid, the shell warehouse data cost is high, and the recovery work is chaotic. Therefore, how to repair the defective shell core and use it in production is a necessary measure to improve the economic benefits of enterprises.


Defect repair principle of shell and core machine: the defect repair process of shell and core machine adopts the curing principle of phenolic resin sand: phenolic resin and hexamethylenetetramine are linear tree structure, also known as urotropine. The molecular formula is (CH) n.) Co-heating, and then a group in a CH: hexamethylenetetramine can connect linear molecules to form a network structure. At the same time, nitrogen is released. Then it further forms the body molecular structure. This will make the resin become a hard solid and will not soften even if the temperature rises, so that it can meet the needs of casting production.


Some problems will inevitably occur during the use of the shell and core machine. When problems occur, it is necessary to apply the right medicine to the case and find corresponding solutions. It must not be carried out blindly, otherwise it will cause secondary damage to the shell and core machine.

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