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Asymmetric DPF die and manufacturing method thereof

A DPF, asymmetric technology, applied in the direction of electrode manufacturing, manufacturing tools, electric processing equipment, etc., can solve the problem of inability to use, similar to manufacture molds, etc., to achieve the effect of low processing cost, convenient processing, and low material cost

Pending Publication Date: 2021-09-21
JIANGSU PROVINCE YIXING NONMETALLIC CHEM MACHINERY FACTORY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the DPF honeycomb ceramic carrier with asymmetric structure, because its product is composed of two types of holes with different sizes, it is impossible to use wire cutting to manufacture corresponding molds, and the existing molds cannot meet the requirements for the manufacture of such products. Use requirements, so it is urgent to develop a new mold for the manufacture of DPF honeycomb ceramic substrates with asymmetric structure

Method used

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  • Asymmetric DPF die and manufacturing method thereof
  • Asymmetric DPF die and manufacturing method thereof
  • Asymmetric DPF die and manufacturing method thereof

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Embodiment Construction

[0024] The present application will be further described below in conjunction with specific embodiments.

[0025] The after-treatment soot particulate filter for diesel vehicles is a DPF honeycomb ceramic carrier with an asymmetric structure. The commonly used hole density models of this product are 300-9, 300-7, the model 300-9 is 300 holes / square inch, the product wall thickness is 9mil (0.229mm), the model 300-7 is 300 holes / square inch, the product wall thickness It is 7mil (0.178mm). The product is usually cylindrical, with an end face diameter in the range of 150-330mm and a length in the range of 100-400mm. The commonly used diameter specifications are 7.5” (190.5mm), 9” (228.6mm), 10.5” (266.7mm), 12” (304.8mm), 13” (330.2mm). The length ratio of the square hole side of the hole is 1.2~1.4, preferably 1.25~1.35, such as figure 1 shown.

[0026] The asymmetric DPF mold used to prepare the DPF honeycomb ceramic carrier with the above asymmetric structure, the main st...

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Abstract

The invention discloses an asymmetric DPF die and a manufacturing method thereof. The asymmetric DPF die comprises an overall die plate, two or more evenly-distributed feeding holes are formed in the back face of the overall die plate, two or more evenly-distributed discharging grooves are formed in the front face of the overall die plate, and the discharging grooves communicate with the corresponding feeding holes, wherein the two or more discharging grooves are composed of two types of tooth columns with different sizes. According to the asymmetric DPF die, groove face tooth columns are designed through the round corners, sharp corner interference is avoided, and the end face cracking defect during product firing can be effectively overcome; according to the asymmetric DPF die, split type XY electrodes are adopted for machining the groove face, the number of electrode machining devices is large, the selection range of electrode materials is wide, cost is low, machining is more convenient, efficiency is higher, the machining period is short, and machining cost is lower; and the advantages that a narrow slit is not prone to deforming during machining is achieved, the roughness of the inner wall of the groove can reach Ra1.0, so that the forming extrusion requirement is met, and good practicability is achieved.

Description

technical field [0001] The invention belongs to the technical field of non-metallic ceramic materials, and in particular relates to an asymmetric DPF (Diesel Particulate Filter, diesel particulate trap or diesel engine particulate capture regenerator) mold and manufacturing method for diesel vehicle National VI post-treatment. Background technique [0002] The post-processing soot particulate filter for diesel vehicles adopts a DPF honeycomb ceramic carrier with a symmetrical or asymmetrical structure, and the honeycomb ceramic mold is composed of many feed holes and discharge troughs connected with it. For the symmetrical DPF honeycomb ceramic carrier, in the patent application CN105773091B, the structural design and manufacturing method of the mold are recorded, which can meet the preparation and use requirements of the DPF honeycomb ceramic carrier. For the DPF honeycomb ceramic carrier with asymmetric structure, because its product is composed of two types of holes with ...

Claims

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Application Information

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IPC IPC(8): B23H1/04B23H5/04B23P15/24
CPCB23H1/04B23H5/04B23P15/243
Inventor 朱雪艳冯家迪
Owner JIANGSU PROVINCE YIXING NONMETALLIC CHEM MACHINERY FACTORY
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