CN101265111A - Technique for manufacturing particles trap ceramic filtering body used for diesel engine - Google Patents
Technique for manufacturing particles trap ceramic filtering body used for diesel engine Download PDFInfo
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- CN101265111A CN101265111A CNA2008100893078A CN200810089307A CN101265111A CN 101265111 A CN101265111 A CN 101265111A CN A2008100893078 A CNA2008100893078 A CN A2008100893078A CN 200810089307 A CN200810089307 A CN 200810089307A CN 101265111 A CN101265111 A CN 101265111A
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Abstract
The invention belongs to a method for producing a ceramic piece used for gas filtration. In order to solve the problems of the prior art, the invention provides a low-cost method for producing a blank of diesel particulate filter (DPF) used for diesel engines. The method mainly comprises the following steps: A. coating films respectively on two end surfaces of a columnar blank; B. selecting film-covered through holes as selected through holes, wherein only one end surface of each through hole is selected and the film penetrates relative to a part of the selected through hole; C. grouting slurry into the penetrated parts of the films to seal the ends of the selected through holes near to the films, wherein only one end of each through hole is sealed; and D. removing the films from the end surfaces of the columnar blank. The technical proposal of the invention has no strict requirements for high machining accuracy and energy, and minimizes the production cost of DPF blanks used for diesel engines.
Description
Technical field
The invention belongs to a kind of making method of ceramic filtering body, particularly a kind of making method that is used for the ceramic filtering body of purification of diesel engine tail gas.
Background technology
Because diesel motor has good and economic, dynamic property and reliability, thereby be widely used as the power of automobile and engineering machinery, but contain a large amount of particulate (PM) in its tail gas, be about 30～80 times of petrol engine quantity discharged, become important source of pollution in the city.Can effectively reduce the widespread use that the content of pollutent in the diesel engine exhaust emission is restricting diesel motor.At present, the technology of the reduction diesel engine exhaust emission pollutent of comparative maturity is to adopt the ceramic base filtering material in porous road to produce the used for diesel engine grain catcher, and the particulate matter that diesel motor emitted is filtered.They are made up of oxide compound or carbide usually, have vesicular structure, can keep thermally-stabilised more than 700 ℃, and specific surface area is greater than 1m
2/ g, primary structure comprise ceramic honey comb, foamed ceramics and ceramic fiber blanket.Ceramic honey comb mainly contains multiple structures such as wall-flow type, foam type.From the angle of collection efficiency, the honeycomb ceramic filter body is the highest, therefore is widely used.As shown in Figure 1, the honeycomb ceramic filter body has vesicular structure, adjacent two are sealed hole 1 (or consent, the plug oral pore, closed pore, closed pore, single closed pore etc.) be in the hole that does not exist together and seal, one is sealed hole 1 import and is plugged, outlet is opened wide, it is unlimited that then its vicinity is sealed hole 1 import, outlet is plugged, the sidewall that seals the hole has a large amount of micropores, this pore structure of sealing forces diesel motor exhaust to be entered by import open seal hole 1, pass the ceramic wall that seals hole 1 and enter the unlimited hole 1 of sealing of adjacent outlet with a large amount of micropores, because the aperture of the micropore on the particle diameter ratio ceramic sidewalls of particulate is big, thus gas can be very smoothly by and particulate just is attracted to and seals on 1 wall of hole.
The cell densities of honeycomb ceramic filter body generally is about 100-300 hole/in
2The structure that wall-flow type honeycomb ceramic body band seals the hole among Fig. 1 forms implement plug-hole again after ceramic body is formed through hole after, the aperture in each duct of ceramic body in actually operating (not burning till the moulded pottery not yet put in a kiln to bake in stage) is difficult to be consistent, so ceramic body is carried out the program that plug-hole is difficult to accurately set with the mechanical coordinate location plug-hole, if but can not accurately carry out plug-hole, then can cause end product quality can not satisfy service requirements, for example cause the hole wall breakage in the plug-hole process and make product rejection, thereby want to realize mechanized operation, production unit is the scantlings of the structure in each ceramic body duct of identification accurately, and then make corresponding data processing according to the practical situation of product, send operational order accurately at last, it is very big that the program of this accurate control is implemented difficulty, cost is very high; In addition, the cross-sectional area of product is big, hole density height, and the quantity in hole is big especially, and also plug-hole technology causes huge obstacle to taking accurately for this.Existing common that ceramic body is carried out the technology of plug-hole is as follows: honeycomb ceramic body is at first wanted the plastic pug extrusion-formation of ceramic of apparatus base substrate; Through hole with two end faces of ceramic body carries out shutoff in the end with pug then; Treat to get through behind the clay drying of plugging hole the occluding body pug of end respective aperture.This process of getting through must be taken pictures to the ceramic body transverse section of the not shutoff that fixes earlier by high performance photographic camera and be gathered the coordinate data in duct, with computer software the view data of camera collection is analyzed then, form the data of each duct residing coordinate position on ceramic body, afterwards according to these data according to rule every a stifled hole, a hole, the perforate instruction is transferred to the laser apparatus that perforate is used, utilize laser that the shutoff pug in the selected duct of ceramic body end face is penetrated, finally obtain satisfactory ceramic honey comb base substrate.The cost of the existing this employed equipment of technology that ceramic body is carried out plug-hole is very high, and complicated operation causes the with high costs of the finished product.
Summary of the invention
The purpose of this invention is to provide a kind of processing method of making used for diesel engine grain catcher (DPF) ceramic filtering body cheaply.
Technical scheme of the present invention is as follows:
The manufacture craft of particles trap ceramic filtering body used for diesel engine comprises the steps: the pug for preparing is made the column base substrate, opens the through hole of some perforation base substrates on described column base substrate, and the axis of described through hole is parallel to column base substrate axis; Also comprise the steps:
A, at two end faces of column base substrate mulch films respectively;
The through hole that B, selected tunicle cover is as selected through hole, and each through hole is only chosen on an end face, penetrates the part of two the above films of end face corresponding to selected through hole;
C, piercing site injects the end that pug blocks the close film of selected through hole on described film;
Thereby D, take film off from the end face of column base substrate and described selected through hole is formed seal the hole.
Film described in the steps A is a transparent adhesive film.
Selected through hole described in the step B is meant at the same end face of column base substrate every a through hole and selected through hole, and the through hole that is spaced is through hole at interval, then be the interval through hole at the selected through hole of an end face at another end face.
The method of the described injection pug of step C has mobile pug for an end face of column base substrate that completing steps B is obtained is pressed into makes pug be injected into selected through hole end; Finish clay drying to be injected behind the described injection pug after do not have flowability, above-mentioned injection pug method is repeated in the other end of column base substrate.
Technique effect of the present invention:
The present invention utilizes the through hole of the temporary transient shutoff column of transparent film base substrate, the part operation that penetrates the corresponding film of selected through hole is simple, only need to get final product with sharp-pointed utensil thorn rupture of membranes, the size and shape that punctures the opening that forms does not need extremely to meet with the cross section of through hole, as long as formed this opening the operation of follow-up injection plug-hole pug is carried out smoothly, the requirement on machining accuracy that therefore stings rupture of membranes can be lower.Because the film on the penetrated through via holes does not need higher processing precision and machining energy, technical scheme of the present invention can not adopt expensive processing unitss such as laser apparatus, simple manual operation can reach the working accuracy that needs, so the present invention has greatly reduced the cost of making particles trap ceramic filtering body used for diesel engine.
Two end faces that adopt transparent adhesive film (for example daily scotch tape) to cover the column base substrate make and are carrying out follow-uply can will penetrating tool positioned exactly by operator's visual determination on transparent adhesive film when penetrating the film step.The adhesivity that while transparent adhesive film itself has can make it more firm with being connected of column base substrate, and the external force when guaranteeing to penetrate transparent adhesive film can not promote transparent adhesive film and cause the location inaccurate.
Adopt and to inject pug to the selected through hole end that the column green body end face penetrates successively and be convenient to pug, avoid under two end faces of base substrate inject the situation of pug simultaneously, pug taking place because to exist flowability to cause not tight with combining of through-hole wall with selected through-hole wall is combined closely and moulding.
Description of drawings
Fig. 1 is the structural representation of particles trap ceramic filtering body used for diesel engine base substrate along axis profile;
Fig. 2 grain catcher porous road column base substrate is not finished the structural representation along axis profile before the shutoff through hole.
Mark lists as follows among the figure:
1, seals the hole, 2, through hole.
Embodiment
Below in conjunction with accompanying drawing technical scheme of the present invention is described in detail.
The manufacture craft of particles trap ceramic filtering body used for diesel engine of the present invention at first need to process as shown in Figure 2 grain catcher multi-through hole column base substrate do not finish before the shutoff through hole crude green body.At first, the various inorganic major ingredient and the organic auxiliary material that are suitable for are mixed with compliant pug in proportion, utilize extruding-out process pug to be made the crude green body of the column base substrate that has multi-through hole as shown in Figure 2, the crude green body of column base substrate is generally cylindric base substrate, the density in hole is 100 orders-300 orders on the crude green body cross section of column base substrate, the crude green body of column base substrate is through after high and dry, according to the requirement for height of product, with the both ends of the surface cutting processing of the crude green body of column base substrate.The axis of the through hole 2 of the some crude green bodies that run through the column base substrate that form is parallel to the axis of the crude green body of column base substrate.
Utilize the crude green body of the above-mentioned grain catcher column base substrate that obtains further to process the particles trap ceramic filtering body used for diesel engine of ultimate demand.Concrete processing step is described as follows:
A, at two end face mulch films of the crude green body of column base substrate.
In this step, utilize scotch tape or other clear films to cover two end faces of grain catcher column base substrate crude green body.It is to be noted that scotch tape or one side are coated with the transparent film of glue, be easy to it and on the end face of the crude green body of grain catcher column base substrate, form firm covering, also do not need to utilize other modes to make transparent film firmly be covered in the end face of grain catcher column base substrate crude green body if transparent film applies glue by the glue face.After handling like this, the transparent film that firmly is covered in described crude green body end face is beneficial to follow-up technology and the injection plug-hole pug implementation of processes of penetrating.
Also can be in specific operation process earlier to an end face mulch film, the A-D step is repeated in the other end after this end face being executed the step of follow-up B-D.
The through hole 2 that B, selected tunicle cover is as selected through hole, and each through hole 2 is only chosen on an end face, penetrates the part of two the above films of end face corresponding to selected through hole.
The purpose of this step is that corresponding selected through hole 2 places form opening on the transparent film that covers on to above-mentioned end face on the basis of completing steps A, even selected through hole 2 is communicated with the space of transparent film opposite side.Here said selected through hole is selected according to following rule: an end face at column base substrate crude green body is selected through hole every the selected through hole conduct of a through hole, the through hole that is spaced is the interval through hole, selected will the interlocking of two end faces carries out, and promptly the selected through hole at an end face then is the interval through hole between the selected through hole at another end face.Make that finally the through hole (through hole with shared hole wall) of the vicinity of each chosen through hole 2 is through hole at interval on same end face.Certainly, it should be appreciated by those skilled in the art that the selected of two or more through holes also is fine at interval.
Penetrating transparent film can be sharp-pointed utensil corresponding to the instrument of selecting the throughhole portions use, and its most advanced and sophisticated size is less than the cross-sectional dimension of through hole 2.Sharp instrument only needs to apply very little power and can realize penetrating when penetrating transparent film, further optimization can be heated the tip, makes to penetrate to be more prone to.Sharp instrument penetrates transparent film and not only is to save energy, the more important thing is the size of the tip size of sharp instrument less than through hole, the absolute axle center of aligned through holes when this just allows to push sharp instrument to transparent film, allow the deviation of certain limit, the opening size that forms on transparent film can satisfy the requirement of subsequent technique at the end face cross-sectional dimension less than through hole 2, this just makes that the actually operating step is simple, can raise the efficiency.In addition, select for use transparent film to make the operator can rely on vision sharp instrument accurately to be positioned the through hole of selecting.
C, piercing site injects the end that the plug-hole pug blocks close the film of selected through hole on described transparent film, because each through hole is chosen on an end face, so each through hole has only an end by shutoff.
The purpose of this step is to pass through the end pug shutoff of the selected through hole of step B processing, the feasible used for diesel engine grain catcher base substrate that finally obtains as shown in Figure 1 of the selected rule among the integrating step B.
The configuration of the plug-hole pug that this step is used is on the basis of the crude green body composition of making porous road column column base substrate, by adding the raw material of the inorganic reduction firing temperature of part, strengthen the synthetic water consumption of pug simultaneously, make pug when plug-hole, possess good flowability, under the effect of external force, pug can flow in the opening that step B leaves on transparent film effectively.When product burns till,, make plug-hole mud to combine together simultaneously with the column base substrate because the plug-hole pug has added the raw material of partly lowering the temperature.
The implementation method that this step is concrete is as follows:
In a container that is provided with the pneumostop device, add the deployed mobile plug-hole pug that has, described plug-hole pug is basic identical with the pug of making used for diesel engine grain catcher porous road base substrate crude green body, the silicon oxide etc. that has just added part in described crude green body pug can reduce the inorganic raw material of product sintering temperature, and adding more simultaneously, the water of volume just can mix mobile well plug-hole pug.The end face of used for diesel engine grain catcher base substrate crude green body that penetrates transparent film of finishing that step B is obtained extend in the said vesse, opens the pneumostop device.On used for diesel engine grain catcher base substrate crude green body, exert pressure used for diesel engine grain catcher base substrate crude green body is further stretched in the plug-hole pug of container into.The effect of pneumostop device is to prevent that the pug in the container under pressure from overflowing.When used for diesel engine grain catcher base substrate crude green body extend in the pug behind the certain distance, stop to exert pressure to it, at this moment, under pressure, have mobile pug and enter into selected through hole, form shutoff in the end of selected through hole by the opening on the transparent film.The used for diesel engine grain catcher base substrate crude green body that forms selected through hole plug at end part is carried out drying, the pug of shutoff through hole and through-hole wall are combined closely, should form behind the shutoff through hole clay drying and go deep into the occluding body of via depth at 5-15mm.
Open the transparent film of this end behind D, the completing steps C.
E, another end face of column base substrate is repeated step from B-D, seal hole 1 thereby described selected through hole is formed.
In order to improve the plug-hole quality of product, to behind the plug-hole pug complete drying of column base substrate crude green body one end face, carry out the plug-hole operation of other end again, lifting except that also being preferably in the plug-hole clay drying of film well afterwards carried out the defective of avoiding plug-hole mud to peel off that can try one's best like this more simultaneously.
Adopt technical scheme of the present invention not need higher processing precision and machining energy, can not adopt expensive processing unitss such as laser apparatus, simple manual operation can reach the working accuracy that needs, so the present invention has greatly reduced the cost of making particles trap ceramic filtering body used for diesel engine.
Should be pointed out that the above embodiment can make those skilled in the art more fully understand the present invention, but do not limit the present invention in any way.Therefore, although this specification sheets has been described in detail the present invention with reference to drawings and embodiments,, it will be appreciated by those skilled in the art that still and can make amendment or be equal to replacement the present invention; And all do not break away from the technical scheme and the improvement thereof of spirit of the present invention and technical spirit, and it all should be encompassed in the middle of the protection domain of patent of the present invention.
Claims (4)
1, a kind of manufacture craft of particles trap ceramic filtering body used for diesel engine comprises the steps: the pug for preparing is made the column base substrate, open the through hole of some perforation base substrates on described column base substrate, the axis of described through hole is parallel to column base substrate axis; It is characterized in that also comprising the steps:
A, at two end faces of column base substrate mulch films respectively;
The through hole that B, selected tunicle cover is as selected through hole, and each through hole is only chosen on an end face, penetrates the part of two the above films of end face corresponding to selected through hole;
C, piercing site injects the end that pug blocks the close film of selected through hole on described film;
Thereby D, take film off from the end face of column base substrate and described selected through hole is formed seal the hole.
2, the manufacture craft of a kind of used for diesel engine grain catcher base substrate according to claim 1 is characterized in that film described in the steps A is a transparent adhesive film.
3, the manufacture craft of a kind of used for diesel engine grain catcher base substrate according to claim 1 and 2, it is characterized in that described in the step B that selected through hole is meant at the same end face of column base substrate every a through hole and selected through hole, the through hole that is spaced is through hole at interval, then be the interval through hole at the selected through hole of an end face at another end face.
4, the manufacture craft of a kind of used for diesel engine grain catcher base substrate according to claim 3, the method that it is characterized in that the described injection pug of step C have mobile pug for an end face of column base substrate that completing steps B is obtained is pressed into makes pug be injected into selected through hole end; Finish clay drying to be injected behind the described injection pug after do not have flowability, above-mentioned injection pug method is repeated in the other end of column base substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100893078A CN101265111A (en) | 2007-11-01 | 2008-04-11 | Technique for manufacturing particles trap ceramic filtering body used for diesel engine |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710176675.1 | 2007-11-01 | ||
| CN200710176675 | 2007-11-01 | ||
| CNA2008100893078A CN101265111A (en) | 2007-11-01 | 2008-04-11 | Technique for manufacturing particles trap ceramic filtering body used for diesel engine |
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| Publication Number | Publication Date |
|---|---|
| CN101265111A true CN101265111A (en) | 2008-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2008100893078A Pending CN101265111A (en) | 2007-11-01 | 2008-04-11 | Technique for manufacturing particles trap ceramic filtering body used for diesel engine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110483094A (en) * | 2019-07-29 | 2019-11-22 | 南京柯瑞特种陶瓷股份有限公司 | The preparation method and honeycomb ceramic filter body of gasoline engine honeycomb ceramic filter body |
| CN112047752A (en) * | 2020-09-16 | 2020-12-08 | 常州浩蔚环保科技有限公司 | Hole blocking structure of particle catcher |
-
2008
- 2008-04-11 CN CNA2008100893078A patent/CN101265111A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110483094A (en) * | 2019-07-29 | 2019-11-22 | 南京柯瑞特种陶瓷股份有限公司 | The preparation method and honeycomb ceramic filter body of gasoline engine honeycomb ceramic filter body |
| CN112047752A (en) * | 2020-09-16 | 2020-12-08 | 常州浩蔚环保科技有限公司 | Hole blocking structure of particle catcher |
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Open date: 20080917 |