A kind of preparation process of exhaust duct
Technical field
The invention belongs to house exhaust passage technical fields, and in particular to a kind of main in machine-made exhaust duct production process
By the way of stage is poured slurry using unilateral side, realize that the gas in sufficiently discharge slurry generates pitted skin, stomata to reduce exhaust duct
Phenomena such as exhaust duct preparation process.
Background technique
Exhaust duct is widely used building element in residential building, to exclude in oil smoke and toilet in kitchen
Exhaust gas, exhaust duct be it is prefabricated, transport to behind construction site the designated position being assembled in building.
Current exhaust duct mostly uses pure manual manufacture, and there are occupied grounds greatly, to the skills involved in the labour of operator
More demanding, exhaust duct side wall the thickness uniformity is difficult the defects of control.With the development of technology, it also has instead of artificial
Touch the mechanism class die apparatus of slurry.
Such as Chinese patent application 201610900867.1 discloses a kind of mold of prefabricated exhaust passage for carrying away, including internal model and outer
Mould, internal model include inner frame and inner frame jack, and inner frame includes the core insert frame of upper inner frame and the upper inner frame of support,
Upper inner frame is C-shaped purlin shape, and upper inner frame lower end is equipped with bolster, and core insert frame is in U-shape, and four angles of inner frame are to fall outside
Angle or the angle R, inner frame inner wall are equipped with lateral reinforcing rib;External mold is in U-shape, including bed die frame and the side for being hinged on bed die frame two sides
Framed, the framed upper end in two sides passes through pull rod secure fit;Internal model is placed on the inside of external mold, and forms die cavity between the two, die cavity
Both ends deployment end frame, internal model are placed on the frame of end.
Such as Chinese patent application 201220070429.4 discloses a kind of exhaust duct casting mold again.Casting mold includes
Side plate, end plate, end plate sealing strip, mold core, sealing oilcloth, dolly chassis, rotary clamping device, quick clamping mechanism, wheel,
Axis, roller, supporting plate and supporting plate sealing strip.
In another example Chinese patent application 200910095561.3 discloses a kind of prefabricated thin-walled exhaust passage molding technique, technique
Step is die assembly, rests in curing kilns after vibrating casting molding, heats maintenance, is cooling, then demoulding natural curing.
It is above-mentioned drawback of the prior art is that, during preparing exhaust duct, two effluents of the slurry from moulding by casting chamber
Enter, then converge to bottom section, during slurry cast, is originally present in the gas in moulding by casting chamber in the drive of slurry
It catches up with down and collects, especially collect in bottom section, on the one hand, cause occur vent plug, gas obstruction phenomenon during slurry cast,
The whereabouts of slurry is influenced, slurry is not easy to be filled to each space of moulding by casting chamber, seriously affects the preparation molding of exhaust duct;
On the other hand, the gas of moulding by casting chamber is difficult to penetrate slurries is discharged upwards, cause gas be present in slurry or slurry with
The junction of mold, phenomena such as causing the stomata, pitted skin, honeycomb on exhaust duct surface, or even cause the gas leak phenomenon of exhaust duct, shadow
It rehearses with musical accompaniment the sealing performance of air flue.
In the prior art, in order to solve the problems, such as that gas is difficult to be discharged during slurry cast, a kind of mode is to molding
Mold carries out high-intensitive horizontal vibration, and the major defect of this mode is that high-intensitive vibration be easy to cause slurries to isolate
(concrete disintegration), lamination cause the non-uniform phenomenon of the Nomenclature Composition and Structure of Complexes inside slurries;In use, high-intensitive
Vibrating noise it is excessive, be also easy to lead to the deformation of mold, be unfavorable for the long-time service of mold;However, slight horizontal vibration
Mode is unobvious to the discharge effect of gas during slurry cast, therefore, high-intensitive horizontal vibration mode still exist compared with
For apparent defect.
Also a kind of mode is to improve the ratio of mud of slurries, to increase the mobility of slurries, to reduce in moulding by casting chamber
Resistance is discharged in gas, realizes the effect for improving gas discharge;Due to the thinner thickness of exhaust duct entirety, generally 15mm or so,
After the ratio of mud for improving slurries, the intensity that will lead to exhaust duct is insufficient, it is difficult to meet exhaust duct system as defined in professional standard
The requirement of the tube body vertical bearing capacity of product;Moreover, can only partially alleviate gas lock, especially after improving the ratio of muds of slurries
It is the gas in the bottom section of lower section after encountering the obstruction of internal model, or exists and be difficult to for gas to be expelled to moulding by casting chamber
Except defect, therefore still there is more obvious for the exhaust duct (the especially molding exhaust duct of bottom section) made
Stomata, pitted skin phenomena such as.
Based on this, the application provides the main rank in exhaust duct preparation process on the basis of guaranteeing exhaust duct intensity
The unilateral side Duan Caiyong is poured the preparation process of slurry, to solve the problems, such as that gas is difficult to thoroughly be discharged in moulding by casting chamber.
Summary of the invention
In view of the drawbacks of the prior art, the present invention provides a kind of preparation processes of exhaust duct, by raw in exhaust duct
Main Stage during production, will be in moulding by casting chamber during being poured slurry using the preparation process of unilateral casting slurry
Gas discharge, reduce exhaust duct generate pitted skin, stomata phenomena such as.
To achieve the goals above, it the present invention provides a kind of preparation process of exhaust duct, is formed with and arranges in a mold
The moulding by casting chamber of air flue shape adaptation, moulding by casting chamber is with top area and bottom section setting up and down and symmetrically
It is located at the first side region and second side region of bottom section two sides, wherein carry out after completing mold positioning as follows
Step:
Step S1, the rotation of mold first stage: mold is turned entirely around first direction towards first side region
It moves to lateral attitude, at this point, forming inclination angle between the bottom section and horizontal plane in moulding by casting chamber;
Step S2, the casting of slurry first stage: it is poured slurry in the top area of mold, is dispersed in the slurry of mobility
First side region and bottom section are flowed into, and gradually fills bottom section, slurry to slurry is persistently poured and is filled up completely bottom
Region;
Step S3, the rotation of mold second stage: mold is turned entirely around second direction towards second side region
It moves to horizontality, at this point, bottom section is located within horizontal plane in moulding by casting chamber;
Step S4, the casting of slurry second stage: continue casting slurry to slurry and be filled up completely moulding by casting chamber.
In above-mentioned technical proposal of the invention, after mold positioning, the rotation of mold first stage is carried out, is poured into
There is inclination angle, first side region and second side region form staggered up and down between bottom section and horizontal plane in type chamber
State, the i.e. lower end in first side region are lower than the lower end in second side region, at this point, being in after the top pouring slurry of mold
The slurry of mobility is dispersed to first side region, and flows into bottom section along first side region, since bottom section inclines
Tiltedly setting, the slurry for flowing into bottom section can first fill side completely close to first side region, then gradually to close to second
Side area is partially filled with, until being filled up completely bottom section.
Wherein, due to not being poured slurry from top in the region of second side in the casting process of slurry, so,
During first side region is poured slurry, slurry can form the side of " catching up with " gas in first side region and bottom section
Formula, by gas be extruded onto second side region until discharge moulding by casting chamber outside, in this process, be not in vent plug,
The phenomenon that gas blocks, maximumlly the gas in moulding by casting chamber was discharged.
Further, it is filled up completely in slurry to bottom section, can will be originally present in the gas of bottom section
It is emptied completely, at this point, the overturning of mold can be carried out, in the case where mold is in horizontality, continues grout material and filled out completely to slurry
Fill each space of remaining moulding by casting chamber.
Specifically, the inclination angle size between bottom section and horizontal plane in step S1 in moulding by casting chamber be 10 °~
45 °, it is preferred that the size at inclination angle is 20 ° or so, specifically such as 15 °;Certainly, the bottom section in moulding by casting chamber and level
The inclination angle size formed between face also can produce part effect of the invention, only effect is poor in other words when less than 10 °
It is longer in order to reach preparation time needed for desired effects.
Another kind specific embodiment according to the present invention, parallel between first direction and second direction or coincidence, and
First direction and second direction are arranged on the length direction of exhaust duct, wherein first direction, second direction are preferably set respectively
Set the first rotation axis and the second rotation axis on exhaust duct length direction.
Another kind specific embodiment according to the present invention in step S2, after slurry is filled up completely bottom section, continues
After casting slurry to slurry is filled up completely first side region, stop the casting of slurry;At this point, slurry fractions fill second side
Region.
In the present solution, the casting process of slurry can be it is continuous, complete largely to be poured under mold tilt state
Journey, casting process of the slurry with steady flow in casting process, in casting process, slurry is flowed from first side region
Enter bottom section, after slurry is completely filled with bottom section, be persistently poured slurry, the slurry for being present in bottom section can be squeezed
Class " piston flow " is formed into second side region, and between first side region, bottom section and second side region, the
Gas is released in a manner of " catching up with " in dual side-edge region, to substantially reduce the gas in slurry, avoids the appearance of gas lock.
Then, slurry is filled up completely first side region, and second side region is also close to being completely filled at this time.
In the present invention, the casting process of slurry, can also be using the throwing of mechanical feed bin for example, by using the mode of Manual material feeding
Material mode.
It is according to the present invention another kind specific embodiment, the present invention in slurry the ratio of mud be no more than 0.6, preferably
, the ratio of mud in the present invention is close to 0.5, and specifically such as 0.47, the exhaust duct of the sizing material forming of this ratio of mud has higher
Structural strength, it is durable.
In order to promote the flowing of slurries, another kind specific embodiment according to the present invention, the first of step S2 slurry
In the casting in stage, it is additionally provided with:
Step S21, the vibration of mold first stage: under mold tilt state, the lasting or interim vibration for carrying out mold
It is dynamic.
In the present solution, mold vibrates in an inclined state, effectively promotes and flow into the region of first side under slurry
It falls, and is deposited in region of the bottom section close to lower section, since bottom section is obliquely installed, at this point, persistently falling into bottom
The slurry in region can gradually be filled from the lower end side of bottom section to the upper end side of bottom section, thus with further real
The gas in bottom section is now expelled to second side region.
Wherein, the frequency of mold first stage vibration be preferably 120~600 times/per minute, vibration time is 1~10 point
Clock, wherein in the casting process of slurry first stage, mold can be vibrated or without vibration, it is preferred that
In the casting process of slurry first stage, mold is without vibration, the only opening mold after slurry is filled up completely bottom section
Vibration processes, at this point, the vibration time of mold is shorter, preferably 1~4 minute, specifically such as 2 minutes.
The mode of unilateral casting slurry in the present invention, can substantially reduce damage caused by mold vibration process, starch
Expect within the scope of the reasonable ratio of mud, using slight short time mode of vibration, even mode of vibration not can be realized discharge and pour into
The process of gas in type chamber, greatly reduces the spoilage of equipment, eliminates the vibrating noise of on-site, is conducive to extend equipment
Service life, it is more main, almost completely eliminate traditional handicraft and cause exhaust duct stomata, pitted skin phenomenon, especially solve
The serious problem of the exhaust duct stomata for the number of mechanisms Mold Making being currently mainly used, pitted skin phenomenon.
Further, in order to which the few portion gas for having enough time penetrating slurry not yet is more thoroughly discharged, further,
After slurry is filled up completely bottom section in step s 2, stop being poured slurry, after the vibration processes for carrying out the mold first stage, then
The secondary process for carrying out casting slurry, wherein the duration vibrated is shorter, such as 1 minute, then using temporarily reducing slurry
The mode of poring rate carry out the casting of slurry.
Another kind specific embodiment according to the present invention, while executing the rotation of step S3 mold second stage,
Execute the casting process of step S4 slurry second stage.
Another kind specific embodiment according to the present invention is additionally provided in the casting of step S4 slurry second stage:
Step S41: the vibration of mold second stage: under die horizontal state, the vibration processes of opening mold.
In the present solution, the main function of mold vibration is the whereabouts for accelerating slurry, time of vibration and frequency should not mistakes
Greatly.
The present invention have it is following the utility model has the advantages that
The present invention is using the preparation process of unilateral casting slurry, and the casting process of slurry is smooth, in moulding by casting chamber not
Phenomena such as will appear vent plug, gas obstruction, the air discharging structure uniformity of production is good, is substantially not in stomata, pitted skin phenomenon;
The ratio of mud of slurry in the present invention is high, and the air discharging structure intensity of production is high, meets row as defined in professional standard
The requirement of the tube body vertical bearing capacity of air flue product;
The casting process of slurry is vibrated using the slight short time, is not vibrated the row that gas can be realized even in the present invention
Out, the damage in exhaust duct preparation process to equipment is greatly reduced, the service life for increasing equipment is conducive to.
The present invention is described in further detail with reference to the accompanying drawing.
Detailed description of the invention
Fig. 1 is the flow diagram of exhaust duct preparation process embodiment 1 of the present invention;
Fig. 2 is the mold positioning states schematic diagram of exhaust duct preparation process embodiment 1 of the present invention;
Fig. 3 is the status diagram after the mold first stage rotation of exhaust duct preparation process embodiment 1 of the present invention;
Fig. 4 is the process status schematic diagram of the casting of the slurry first stage of exhaust duct preparation process embodiment 1 of the present invention
A;
Fig. 5 is the process status schematic diagram of the casting of the slurry first stage of exhaust duct preparation process embodiment 1 of the present invention
B;
Fig. 6 is the process status schematic diagram of the casting of the slurry first stage of exhaust duct preparation process embodiment 1 of the present invention
C;
Fig. 7 is that the process status of the casting of the completion slurry second stage of exhaust duct preparation process embodiment 1 of the present invention is shown
It is intended to;
Fig. 8 is the state after the casting complete of the completion slurry second stage of exhaust duct preparation process embodiment 1 of the present invention
Schematic diagram.
Specific embodiment
Traditional exhaust duct preparation process adopts the mode being molded with a mold in conjunction with slurry is manually touched, and manually touches slurry process and is easy to make
The even phenomenon of air flue wall unevenness in a row, and, the labour of operator more demanding to the skills involved in the labour of operator
Intensity is larger, and with the development of mechanical equipment technology, the mode that machinery prepares exhaust duct is developed, using mechanical equipment
The exhaust duct of (mold) production is also known as machine-made exhaust duct or mechanism flue, by the combination of internal model and external mold, in a mold
Formed with the moulding by casting chamber of exhaust duct shape adaptation, moulding by casting chamber have top area and bottom section setting up and down,
And it is symmetrically arranged at the first side region and second side region of bottom section two sides, wherein interconnected top area,
Bottom section, first side region and second side region Forming Mechanism exhaust duct main part.
Embodiment 1
As shown in figures 1-8, a kind of preparation process of exhaust duct, the especially preparation process of machine-made exhaust duct, it is fixed in mold
After position is completed, following steps are executed:
Step S1, the rotation of mold first stage:
Mold carries out turning to lateral attitude towards first side region 1 entirely around first direction, at this point, moulding by casting
Bottom section 22 in chamber and inclination alpha is formed between horizontal plane;
Preferably, the size at inclination angle is 10 °~45 ° between the bottom section 2 and horizontal plane in moulding by casting chamber, further
, the size at inclination angle is 20 ° or so, and the inclination angle size α in the present embodiment is 15 °, as shown in Figure 3.
Wherein, after mold rotation to lateral attitude, first side region 1 and second side region 3 form and interlock up and down
State, the i.e. lower end in first side region 1 are lower than the lower end in second side region 3;
Specifically, after mold rotation to heeling condition die angle can be carried out for example, by structures such as locking devices
The locking of position, in the casting process in later period, in the case of non-setting, the position of mold will not change.
Step S2, the casting of slurry first stage:
It is poured slurry in the top area 4 of mold, flows into first side region 1 and bottom zone in the slurry dispersion of mobility
Domain 2, and bottom section 2 is gradually filled, it is persistently poured slurry to slurry and is filled up completely bottom section 2;
In the casting process of slurry first stage, under gravity, the slurry for falling into first side region 1 can be led
It fills into bottom section 2, as shown in Figure 4;
Since bottom section 2 is obliquely installed, the slurry for flowing into bottom section 2 can be filled first completely close to first side region 1
Side;With the lasting casting process of slurry, the slurry in bottom section 2 in mobility will form the stream of similar " piston flow "
Flowing mode is gradually filled up completely bottom section 2, as seen in figs. 5-6.
Specifically, in above process, slurry is only flowed into from first side region 1, slurry first side region 1,
Only has a flow direction in bottom section 2, slurry forms the side of " catching up with " gas in first side region 1 and bottom section 2
Formula, not will cause vent plug, gas obstruction the phenomenon that, the flowing of slurry is smooth, maximumlly by moulding by casting chamber gas be discharged.
Therefore, casting slurry is carried out using aforesaid way, the ratio of mud of slurry can be significantly reduced, wherein the present embodiment
In the ratio of mud be 0.5.
Step S3, the rotation of mold second stage:
Mold carries out turning to horizontality towards second side region 3 entirely around second direction, at this point, moulding by casting
Bottom section 2 is located within horizontal plane in chamber;
In the rotation process of mold second stage, slurry is full of bottom section 2 always, i.e. gas will not be mixed into bottom again
In portion region 2.
Wherein, parallel between first direction and second direction or coincidence, and first direction and second direction are arranged at
On the length direction of exhaust duct;
Wherein, it the first direction in the present embodiment and overlaps between second direction.
Step S4, the casting of slurry second stage:
Continue casting slurry to slurry and be filled up completely moulding by casting chamber, as Figure 7-8.
It in the present embodiment, is filled up completely in slurry to bottom section 2, can will be originally present in bottom section 2
Gas is emptied completely, at this point, the overturning of mold can be carried out, in the case where mold is in horizontality, it is complete to slurry to continue grout material
Each space of full packing residue moulding by casting chamber.
In the present embodiment, after slurry is filled up completely bottom section 2, continues casting slurry to slurry and be filled up completely the first side
After border region 1 (slurry fractions fill second side region 3, at this point, second side region 3 is also close to being completely filled), stop
The casting of slurry, or continue the casting of slurry second stage, while carrying out the rotation of mold second stage.
Preferably, casting process, the casting process and slurry second-order of slurry first stage are automated for the ease of slurry
The casting process of section be it is continuous, complete under mold tilt state that most of casting process, slurry has in casting process
The casting process of steady flow, in the rotation process of mold second stage will not intermittent, casting speed close pour
Note process.
In the present embodiment, after step S4 completion, it is additionally provided with and the slurry of top area 4 is modified and whole
The processes such as the maintenance of body.
Embodiment 2
A kind of preparation process of exhaust duct, the especially preparation process of machine-made exhaust duct are held after mold positioning is completed
Row following steps:
Step S1, the rotation of mold first stage:
Mold carries out turning to lateral attitude towards first side region entirely around first direction, at this point, moulding by casting
Inclination angle is formed between bottom section and horizontal plane in chamber;
Preferably, the size that inclination angle is formed between the bottom section and horizontal plane in moulding by casting chamber is 10 °~45 °, into
One step, the size at inclination angle is 20 ° or so, and the inclination angle size of the present embodiment is 20 °.
Wherein, after mold rotation to lateral attitude, first side region and second side region form staggered up and down
State, the i.e. lower end in first side region are lower than the lower end in second side region;
Specifically, after mold rotation to heeling condition die angle can be carried out for example, by structures such as locking devices
The locking of position, in the casting process in later period, in the case of non-setting, the position of mold will not change.
Step S2, the casting of slurry first stage:
It is poured slurry in the top area of mold, flows into first side region and bottom zone in the slurry dispersion of mobility
Domain, and bottom section is gradually filled, it is persistently poured slurry to slurry and is filled up completely bottom section;
In the casting process of slurry first stage, under gravity, the slurry for falling into first side region can be led
It fills into bottom section, since bottom section is obliquely installed, the slurry for flowing into bottom section can first be filled completely close to first
The side of side area;With the lasting casting process of slurry, the slurry in bottom section in mobility will form similar " piston
The type of flow of stream ", is gradually filled up completely bottom section.
Specifically, in above process, slurry is only flowed into from first side region, and slurry is in first side region, bottom
Only has a flow direction in portion region, slurry forms the mode of " catching up with " gas in first side region and bottom section, no
The phenomenon that will cause vent plug, gas obstruction, the flowing of slurry is smooth, and maximumlly the gas in moulding by casting chamber is discharged.
Therefore, casting slurry is carried out using aforesaid way, the ratio of mud of slurry can be significantly reduced, it is preferred that this implementation
The ratio of mud in example is 0.47.
Step S21, the vibration of mold first stage:
Under mold tilt state, the lasting or interim vibration for carrying out mold,
Wherein, the vibration of mold first stage be it is slight, the short time, amplitude is lower, the lesser vibration of vibration frequency
Dynamic process, for example, the frequency that the mold first stage is vibrated in the present embodiment be 120 times/per minute, vibration time is 2 minutes.
Further, while the casting in the slurry first stage starts, start the vibration processes of mold first stage;Mould
Tool vibrates in an inclined state, effectively promotes the whereabouts for flowing into slurry in the region of first side, and be deposited in bottom section
Close to the region of lower section, since bottom section is obliquely installed, at this point, the slurry for persistently falling into bottom section can be from bottom zone
The lower end side in domain is gradually filled to the upper end side of bottom section, thus with further realizing the gas in bottom section
It is expelled to second side region.
At this point, whole process is under vibrational state, vibration accelerates the flowing of slurry, also the casting of reduction when
Between, complete heeling condition under casting process time be 5-10 minutes, in the present embodiment, under heeling condition casting process when
Between be 7 minutes.
Step S3, the rotation of mold second stage:
Mold carries out turning to horizontality towards second side region entirely around second direction, at this point, moulding by casting
Bottom section is located within horizontal plane in chamber;
In the rotation process of mold second stage, slurry is full of bottom section always, i.e. gas will not be mixed into bottom again
In portion region.
Wherein, parallel between first direction and second direction or coincidence, and first direction and second direction are arranged at
On the length direction of exhaust duct.
Preferably, it overlaps between first direction and second direction.
Step S4, the casting of slurry second stage:
Continue casting slurry to slurry and is filled up completely moulding by casting chamber.
Embodiment 3
A kind of preparation process of exhaust duct, the especially preparation process of machine-made exhaust duct, the area of the present embodiment and embodiment 1
It is not, in the casting process for executing step S4 slurry second stage, the vibration of mold second stage can also be carried out: in mould
Have under horizontality, the vibration processes of opening mold, the few part for having enough time penetrating slurry not yet is more thoroughly discharged
Gas.
In the present embodiment, the main function of mold vibration is the whereabouts for accelerating slurry, and time of vibration and frequency are smaller,
For example, in the present embodiment mold be in the time of vibration under horizontality be 2 minutes, vibration frequency be 120 times/per minute.
Although the present invention is disclosed above in the preferred embodiment, it is not intended to limit the invention the range of implementation.Any
The those of ordinary skill in field is not departing from invention scope of the invention, improves when can make a little, i.e., all according to this hair
Bright done same improvement, should be the scope of the present invention and is covered.