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Dry formed automotive three-way catalytic converter sealing gasket and preparation method thereof

A catalytic converter, dry forming technology, applied in mechanical equipment, engine components, machines/engines, etc., can solve the problems of uneven vermiculite dispersion and high production costs, and achieve improved density and tightening force, good structure and uniformity. sexual effect

Inactive Publication Date: 2012-05-23
LUYANG ENERGY SAVING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current production of ceramic sealing gaskets has the disadvantages of uneven dispersion of vermiculite and high production costs when it is produced by wet papermaking process
For this reason, it is necessary to develop a new formula product and a new process route to solve the uniformity of vermiculite dispersion and solve the problem of high production cost

Method used

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  • Dry formed automotive three-way catalytic converter sealing gasket and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The ratio of raw materials is as follows: 80 parts of aluminum silicate fiber, 40 parts of unexpanded vermiculite produced in Xinjiang, 25 parts of sodium bentonite solution with a concentration of 30%, 30 parts of acrylic acid copolymer emulsion, and 100 parts of water. Add to the dough mixer for dough kneading, the kneading time is about 10 minutes, and the fiber length is 2-5 mm. After being trapped in this state for 30 minutes, the dough is then extruded and formed with a traditional food industry dough machine. The size is 1200×600mm. Finally realize the present invention. Product performance index of the present invention is as follows:

[0045] It should refer to the performance of this product:

[0046] (1) Pad thickness: 1mm

[0047] (2) General pad surface density: 1050g / m 2

[0048] High-density pad surface density: 6200g / m 2 (Installation density = gasket weight / clearance)

[0049] (3) Compressive strength: >0.1N / mm 2

[0050] (4) Expansion perfor...

Embodiment 2

[0057] The ratio of raw materials is as follows: 50 parts of aluminum silicate fiber, 30 parts of unexpanded vermiculite produced in Xinjiang, 20 parts of sodium bentonite solution with a concentration of 30%, 35 parts of acrylic acid copolymer emulsion and 80 parts of water. Join the dough mixer for kneading, the kneading time is about 10 minutes, and the fiber length is 2-5mm. After being trapped in this state for 30 minutes, the dough is then extruded and formed with a traditional food industry dough machine. The size is 1200×600mm. Finally realize the present invention. Product performance index of the present invention is as follows:

[0058] (1) Pad thickness: 4mm

[0059] (2) General pad surface density: 2865g / m 2

[0060] High-density pad surface density: 8400g / m 2 (Installation density = gasket weight / clearance)

[0061] (3) Compressive strength: >0.1N / mm 2

[0062] (4) Expansion performance:

[0063] One cycle: 0.344N / mm 2 Load, at 22℃-750℃±10℃

[0064] ...

Embodiment 3

[0069] A three-way catalytic converter sealing liner, its raw material composition ratio is: 100 parts of aluminum silicate fiber, 5 parts of unexpanded vermiculite produced in Xinjiang, 30 parts of sodium bentonite solution with a concentration of 30%, and 25 parts of acrylic acid copolymer emulsion , 120 parts of water. Join the dough mixer for kneading, the kneading time is about 10 minutes, and the fiber length is 2-5mm. After being trapped in this state for 30 minutes, the dough is then extruded and formed with a traditional food industry dough machine. The size is 1200×600mm. Finally realize the present invention. Product performance index of the present invention is as follows:

[0070] (1) Pad thickness: 7mm

[0071] (2) General pad surface density: 4695g / m 2

[0072] High-density pad surface density: 12400g / m 2 (Installation density = gasket weight / clearance)

[0073] (3) Compressive strength: >0.1N / mm 2

[0074] (4) Expansion performance:

[0075] One cyc...

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Abstract

The invention relates to a dry formed automotive three-way catalytic converter sealing gasket. The sealing gasket is characterized by consisting of the following raw materials in part by weight: 50 to 100 parts of ceramic fibers, 5 to 40 parts of unexpanded vermiculite, 20 to 30 parts of sodium-based bentonite solution at the concentration of 30 percent, 25 to 35 parts of flexible acrylic copolymer emulsion, and 80 to 120 parts of water. By introducing sodium-based bentonite serving as a plasticizer and referring to the dough kneading and extruding technology of the food industry, the conventional wet papermaking production technology for the automotive three-way catalytic converter sealing gasket is eliminated, and a dry dough extruding technology serving as an innovation is adopted. Better structural uniformity of the sealing gasket is ensured, and the density and the fastening strength of the sealing gasket are improved.

Description

technical field [0001] The invention belongs to the technical field of ceramic fiber materials, and in particular relates to a sealing liner for a three-way catalytic converter of an automobile formed by a dry method and a preparation method thereof. Background technique [0002] The growing problem of air pollution in cities is largely caused by cars. Auto to TSP, SO 2 , CO, NO x , Pb average share rates were 15%, 3%, 81%, 41%, 80%. According to statistics, every 1,000 vehicles emit about 3,000kg of CO, about 400kg of HC, and about 400kg of NO x About 150kg. On average, about 70 kg of pollutants are produced for every 1 ton of gasoline burned. The world's automobiles emit about 220 million tons of CO every year, accounting for more than 1 / 3 of global emissions. The car is a mobile source, and the harmful substances it emits are distributed in the airflow near the ground, and its concentration is directly proportional to the total emission of the car. The highest conc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/28C08L33/00C08K3/34C08K7/10C08K3/36
CPCY02T10/22Y02A50/20Y02T10/12
Inventor 岳耀辉刘超徐营张善才
Owner LUYANG ENERGY SAVING MATERIALS CO LTD