Dry ice forming die

Abstract

The invention discloses a dry ice forming die. The dry ice forming die comprises a lower die cylinder; the lower die cylinder is of a vertical through structure so that an up-down through die cavity is formed in the internal space of the lower die cylinder; the dry ice forming die further comprises an upper die cylinder; the upper die cylinder is a vertical through structure so that an up-down through air chamber is formed in the internal space of the upper die cylinder; the four sides of the bottom end of the upper die cylinder are hermetically butted with the four sides of the top end of thelower die cylinder; the inner and outer surfaces of the sidewall of the upper die cylinder are penetrated to form a through hole; an air filter screen is embedded into the through hole; the sidewallof the upper die cylinder is provided with a feeding opening above the air filter screen; the dry ice forming die further comprises a top plate used for covering the air chamber from the upper direction; and the center of the top plate is provided with a mobile shaft penetrating hole. The length of the lower die cylinder is effectively reduced, so the manufacturing cost of the die is greatly lowered. Besides, the upper die cylinder is provided with the air filter screen for exhausting air, so snow-like CO2 can be effectively prevented from escaping, the consumption of CO2 is reduced, the yieldis increased, and the structure of the lower die cylinder can be simplified by intensively exhausting air by utilizing the upper die cylinder.

Description

technical field [0001] The invention relates to a mold, in particular to a dry ice forming mold. Background technique [0002] The basic principle of dry ice production is to spray liquid carbon dioxide into the mold cavity, and the carbon dioxide accumulates in the mold cavity in the form of snowflakes, and then, use the upper and lower hydraulic cylinders to compact the snowflake-like carbon dioxide in the mold cavity to finally produce Dry ice in a block structure. The mold cavity needs to withstand a lot of pressure during the production process, which requires the thickness of the mold cavity wall to be made larger, and a large amount of liquid / solid carbon dioxide will be transformed into a gaseous state during the dry ice production process, and the inside of the mold cavity The surface needs to be provided with many exhaust grooves for exhaust, and the carbon dioxide gas rises upward in the air, so the mold cavity needs to have a sufficient length to ensure the exha...

AI Technical Summary

Problems solved by technology

The mold cavity needs to withstand a lot of pressure during the production process, which requires the thickness of the mold cavity wall to be made larger, and a large amount of liquid / solid carbon dioxide will be transformed into a gaseous state during the dry ice production process, and the inside of the mold cavity The surface needs to be provided with many exhaust grooves for exhaust, and the carbon dioxide gas rises upward in the air, so the mold cavity needs to have a sufficient length to ensure the exhaust effect, which will greatly increase the weight and volume of the mold cavity, and increase Cavity production cost

In addition, the exhaust groove is now a long groove set on the inner surface of the mold cavity, with a width of 0.2mm. The width of the exhaust groove is relatively large, and part of the snowflake-like carbon dioxide will be taken away while exhausting, which increases the consumption of carbon dioxide. volume, low yield of dry ice

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