Exhaust structure of nuclear fuel processing mold

Abstract

The invention discloses an exhaust structure of a nuclear fuel processing mold. The exhaust structure of the nuclear fuel processing mold comprises a mold body, a mold hole is formed in the top surface of the mold body, a cover sleeve covers and is fixed to a top port of the mold hole, a round hole is formed in the top surface of the cover sleeve, the round hole communicates with the interior of the mold hole, a storage groove is formed in the inner wall of the port of the round hole, a rubber sheet is arranged in the storage groove, a fixing shaft is fixedly connected to the inner wall of the rubber sheet and the inner wall of the storage groove, a reset spring is fixedly connected to the inner side of the end, adjacent to the fixing shaft, of the rubber sheet, the other end of the reset spring is fixed to the bottom of the inner wall of the storage groove, the rubber sheet is perpendicular to the storage groove, and the end part of the rubber sheet is fixed in the port of the round hole. The end faces of the rubber sheets are attached to the surface of a lower punch to seal the gaps, meanwhile, the rubber sheets are made of flexible materials, the gaps can be exposed between the adjacent end faces when the internal pressure reaches a certain degree, and redundant air can be exhausted conveniently in the nuclear fuel mold processing process.

Description

technical field [0001] The invention relates to the technical field of molds, in particular to an exhaust structure of a nuclear fuel processing mold. Background technique [0002] The production principle of tablet-like nuclear fuel is to use a female mold with a hole in the middle to add powdered raw materials into the female mold, insert the upper and lower punches into the female mold at the same time, and complete the extrusion of the powder in the female mold. According to the shape and size of the upper and lower sides of the nuclear fuel, the upper and lower punches can be made into shapes opposite to those of the nuclear fuel. Currently, the nuclear fuel processing molds on the market still have various deficiencies and cannot meet the needs of production and life. ; [0003] For example, in the current process of nuclear fuel mold processing, the excess air is discharged to the outside of the mold through the gap between the lower punch and the die, but the size o...

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Problems solved by technology

[0002] The production principle of tablet-like nuclear fuel is to use a female mold with a hole in the middle to add powdered raw materials into the female mold, insert the upper and lower punches into the female mold at the same time, and complete the extrusion of the powder in the female mold. According to the shape and size of the upper and lower sides of the nuclear fuel, the upper and lower punches can be made into shapes opposite to those of the nuclear fuel. Currently, the nuclear fuel processing molds on the market still have various deficiencies and cannot meet the needs of production and life. ;

[0003] For example, in the current process of nuclear fuel mold processing, the excess air is discharged to the outside of the mold through the gap between the lower punch and the die, but the size of the gap is difficult to grasp. If the gap is too large, the powder will overflow to the outside of the mold through the lower punch to make the nuclear fuel pieces The weight is inaccurate, and it is easy to damage the mold and cause losses. If the gap is too small, the air cannot be discharged from the nuclear fuel sheet and the compaction cannot be carried out. For this reason, we propose an exhaust structure for the nuclear fuel processing mold.

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