Preparation method of ultralarge high-pore-density honeycomb ceramic mold
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A technology of ultra-large size and honeycomb ceramics, which is applied in the field of making molds for ceramic production, and can solve problems such as not being able to meet needs
Inactive Publication Date: 2013-01-09
李少荣
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Problems solved by technology
Therefore, the traditional process of making honeycomb ceramic molds can no longer meet the needs of large-scale and high-pore-density honeycomb ceramic carriers for diesel vehicles.
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Embodiment 1
[0027] The manufactured product diameter is ?350mm, the grid wall thickness is 0.18mm, the hole density is 300 mesh, and the extrusion pressure is greater than 15Mpa honeycomb ceramic mold.
[0028] (1) Two pieces of circular SKD11 mold steel are selected, processed by lathe and grinder respectively, into a mold blank with a thickness of ?480mm and a thickness of 20mm, and a blank of a mud deflector with a thickness of ?480mm and 18mm.
[0029] (2) Overlay the above two blanks together, tap two points on the diameter line of the blank 5mm away from the edge of the blank, and then use a screw to fix the two blanks together.
[0030] (3) Fix the two fixed blanks on the precision drilling machine according to the upward direction of the mud guide plate, take the center of the blank circle as the positioning point, and follow the mold design plan (product diameter 350mm, 300 mesh, grid wall thickness 0.18 mm, product shrinkage rate 7%), program the drilling machine for the first d...
Embodiment 2
[0039] Manufacture ?450mm, cell wall thickness 0.22mm, hole density 200 mesh, extrusion pressure greater than 15Mpa honeycomb ceramic mold.
[0040] (1) Select two round SKD61 mold steels, and process them into a mold blank with a thickness of 600mm and a thickness of 22mm and a blank of a mud guide plate with a thickness of ?
[0041] (2) Overlay the above two blanks together, tap two points on the diameter line of the blank 5mm away from the edge of the blank, and then use a screw to fix the two blanks together.
[0042] (3) Fix the two fixed blanks on the precision drilling machine according to the upward direction of the mud guide plate, take the center of the blank circle as the positioning point, and follow the mold design plan (product diameter 450mm, 200 mesh, grid wall thickness 0.22 mm, product shrinkage rate 5%), program the drilling machine for the first drilling: drilling range: within a circle with a diameter of 500mm in the center of the blank, hole arrangement:...
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Abstract
The invention relates to a preparation method of a ultralarge high-pore-density honeycomb ceramic mold, which is characterized in that a mud guide porous plate is added in front of a traditional honeycomb ceramic mold to thicken the large high-pore-density honeycomb mold and to realize a purpose for enhancing the mold; and meanwhile, a mud guide hole on the front section of the mold is divided into two parts to be manufactured, the depth of the mud guide hole on the front end of the mold is greatly reduced, the difficulty for machining a small blind hole is reduced, the danger that a drill bit is broken in the machining process of a deep small blind hole is reduced, and the manufacturing efficiency of the mold can be greatly improved; and meanwhile the verticality of the mud guide hole on the front section of the mold can be improved, so that more precision for positioning the mud guide hole of the mold and the center of a cutting groove on the rear end can be realized, and the quality of the mold is improved. Due to adopting the preparation method, the thin-wall ultralarge honeycomb ceramic mold with pore density being less than or equal to 600 meshes, wall thickness being more than or equal to 0.1mm, maximal diameter being less than or equal to 500mm and the forming pressure being more than 15MPa can be manufactured.
Description
technical field [0001] The invention relates to the field of manufacturing molds for production of special ceramics, in particular to a method for preparing super-large-sized high-pore-density honeycomb ceramic molds. Background technique [0002] With the continuous improvement of the environmental protection level of motor vehicles, the National III and National IV emission regulations for diesel engines have also been promulgated in major cities in my country in recent years. At present, there are mainly two schemes for aftertreatment of diesel vehicle exhaust (such as figure 1 , figure 2 shown). In these two schemes, the DPF particle capture system needs to use the wall-flow honeycomb ceramic filter body, and the SCR system needs to use the catalyst carrier. Since diesel engines generally have high horsepower and high displacement, the honeycomb used Ceramics are also of large size. The diameter of general products is between 150-450mm, and the hole density is betwee...
Claims
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