CN105178035A - Manufacturing method of flame-retardant curtain - Google Patents

Manufacturing method of flame-retardant curtain Download PDF

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Publication number
CN105178035A
CN105178035A CN201510646364.1A CN201510646364A CN105178035A CN 105178035 A CN105178035 A CN 105178035A CN 201510646364 A CN201510646364 A CN 201510646364A CN 105178035 A CN105178035 A CN 105178035A
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flame
retardant
curtain
agitator
shaft
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CN105178035B (en
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黄国甫
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Zhejiang Yuehai Taike Coating Technology Co., Ltd
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HAINING YUEHAI TAIKE COATING TECHNOLOGY Co Ltd
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  • Curtains And Furnishings For Windows Or Doors (AREA)

Abstract

The invention relates to a manufacturing method of a flame-retardant curtain. The flame-retardant curtain comprises a curtain surface layer and a curtain inner side, wherein a flame-retardant layer is additionally arranged on the inner side of the curtain and comprises components in volume ratio as follows: 30%-40% of spinning latex 718, 30%-40% of a flame retardant, 8%-12% of titanium dioxide, 10%-25% of a foam stabilizer, 0.2%-0.8% of a crosslinking agent and 0.5%-2.5% of ammonia water. Cutting and material preparation are performed, prepared materials are poured into a coating scattering machine to be stirred, flame-retardant coating glue is formed and uniformly applied to the inner surface of the curtain after being foamed, the flame-retardant layer is formed, and the flame-retardant curtain is manufactured after the flame-retardant layer is dried. The flame-retardant curtain has good flame retardancy, is attractive, practical and has other properties.

Description

A kind of preparation method of flame-retardant curtain
Technical field
The present invention relates to a kind of preparation method of flame-retardant curtain.
Background technology
At present, curtain not only serves the effect of attractive, decorative in life staying idle at home, also possesses the practicality such as dust-proof, sunshade simultaneously.Curtain adopts full-cotton fabric, terylene cloth or linen goods etc. as fabric usually, but these fabrics all have a common feature, these fabrics are all belong to inflammable fabric, once initiation fire, the flammable properties of fabric can affect the person and the property safety of people to a certain extent, brings great harm; Although be employed already the fire retardant treatment process of lint, fiber etc., in flame retardant treatment process, still there is new technical problem.Such as: a kind of method (200810033552.7) of wool or the flame-proof treatment containing wool fabric, by first doing oxidation pre-treatment to containing wool fabric, the dyeing and finishing afterfinish method of flame treatment is made again with the fire resistant fluid containing metal oxide sols such as SNO2, improve the fire resistance of wool fabric, but the fragile lint fabric of this flame-proof treatment method, and complex process, flame retardant effect is very micro-.
Summary of the invention
Technical problem to be solved by this invention is, for the above-mentioned deficiency of prior art, proposes a kind of good flame retardation effect, the simple flame-retardant curtain of technique.
The technical scheme that the present invention solves the employing of its technical problem is, a kind of flame-retardant curtain, comprise curtain surface layer and curtain inner side, described curtain inner side has additional flame-retardant layer, and wherein said flame-retardant layer is grouped into by the one-tenth of following volume ratio: weaving latex 718:30-40%, fire retardant: 30-40%, titanium dioxide: 8-12%, foam stabilizer: 10-25%, crosslinking agent: 0.2-0.8%, ammoniacal liquor: 0.5-2.5%.
Flame-retardant curtain of the present invention is by the composition in reasonable compatibility flame-retardant layer, attractive in appearance at guarantee curtain, while durable, has fabulous flame retardant effect.
Described curtain body can select commercially available full-cotton fabric, terylene cloth or linen goods.Described organic fire-retardant is one or more in halogen system, phosphate, halogenated phosphate, a hexabromo water prose style free from parallelism, ten bromo-antimonous oxide flame-retardant systems, and described inorganic combustion inhibitor is one or more in aluminium hydroxide, magnesium hydroxide, MAP, Diammonium phosphate (DAP), ammonium chloride, boric acid.Described foam stabilizer is one or more in DDAO, alkylolamides, polyacrylamide.Described crosslinking agent can adopt conventional crosslinking agent common in prior art.The particle diameter of described titanium dioxide is 300-500 order, and ammonia concn is 40-60%.
As preferably, the flame-retardant layer in above-mentioned flame-retardant curtain is grouped into by the one-tenth of following volume ratio: weaving latex 718:35%, fire retardant: 35%, titanium dioxide: 10%, foam stabilizer: 18%, crosslinking agent: 0.5%, ammoniacal liquor: 1.5%.
Second object of the present invention is the preparation method providing a kind of flame-retardant curtain, and the method comprises the following steps:
S1, choose commercially available calico and be cut into curtain body, point curtain surface layer and curtain inner side;
S2, take the raw material of flame-retardant layer by the composition of above-mentioned volume ratio;
S3, successively the raw material of flame-retardant layer weaving latex, fire retardant, titanium dioxide, foam stabilizer, crosslinking agent, ammoniacal liquor are poured in the agitator of coating dispersion machine and stirred, until forms flame-retardant coatings glue;
S4, by flame-retardant coatings glue obtained in step S3 through uniform in foaming be coated onto curtain inner side surface form flame-retardant layer and obtain flame-retardant curtain semi-finished product, then semi-finished product are placed in baking oven and carry out twice oven dry, obtained final products flame-retardant curtain.
In the preparation method of above-mentioned flame-retardant curtain, as preferably, the mixing time described in step S3 is 30min-40min, and whipping temp is 30-50 DEG C,
In the preparation method of above-mentioned flame-retardant curtain, as preferably, the bake out temperature described in step S4 is 50-160 DEG C, each drying time 700-900min.
3rd object of the present invention is to provide a kind of coating dispersion machine preparing above-mentioned flame-retardant curtain, this coating dispersion machine comprises base, described base is provided with agitator, described agitator top has opening, described base is fixed with column, described column top is fixed with head, in described head by axial restraint and circumference rotate mode be provided with a shaft, described shaft straight down, and shaft lower end is in agitator through described opening, described head is provided with the actuating unit that shaft can be driven to rotate, described shaft bottom is fixed with dismountable agitator disk, the outer peripheral face place of described agitator disk is evenly fixed with some ends lower stirring piece downward, end upper stirring piece is upward provided with between described every two adjacent lower stirring pieces, upper stirring piece is all fixed on the outer peripheral face place of agitator disk.
The operation principle of coating dispersion machine of the present invention is as follows, agitator disk is fixed to shaft bottom, agitator is placed on base, agitator disk is made to be in agitator, to the coating stirred be needed to be poured in agitator again, drive shaft to rotate by actuating unit, shaft drives agitator disk to rotate together, agitator disk drives upper stirring piece to rotate together with lower stirring piece, and upper stirring piece and lower stirring piece stir the coating in agitator.
In above-mentioned coating dispersion machine, the angle between described upper stirring piece and the card of agitator disk is obtuse angle, and the angle between described lower stirring piece and the card of agitator disk is also obtuse angle.
Angle between upper stirring piece and the card of agitator disk is obtuse angle, the angle at such as obtuse angle is 135 °, lower angle between stirring piece and the card of agitator disk is also obtuse angle, the angle at such as obtuse angle is 135 °, this structure has good shearing peptizaiton, can increase the contact area of agitator disk and coating simultaneously, make stirring more fully evenly, save time, enhance productivity.
In above-mentioned coating dispersion machine, the tube connector that inside has passage is fixed with in the middle part of described agitator disk, the tube wall of described tube connector offers the connecting hole be connected with inner passage, above-mentioned shaft is located in described tube connector, described shaft offers the locating hole corresponding with described connecting hole, connecting hole and locating hole all have internal thread, and a bolt is threaded in connecting hole and locating hole simultaneously.
When agitator disk changed by needs, the tube connector of agitator disk is penetrated into the lower end of shaft, the locating hole that rotation agitator disk makes shaft be provided with is corresponding with the connecting hole on tube connector tube wall, be threaded in connecting hole and locating hole with a bolt simultaneously, agitator disk is fixed on shaft, the agitator disk of dismantled and assembled different model, simple to operate, versatility is fabulous.
In above-mentioned coating dispersion machine, described agitator is cylindric, described agitator top is provided with the bung described closure of openings can lived, described bung comprises bung one in semicircle shape and bung two, described bung one and bung two are provided with quick locker, offer the breach one in semicircle shape and breach two in the middle part of described bung one and bung two respectively.
When needing to stir the coating in agitator, the bung one of semicircle shape and bung two are covered the opening part at agitator respectively, by quick locker bung one and bung two be fixed together and be combined into a complete bung, the external diameter of bung is greater than the external diameter of agitator, agitator opening is made to be in closed state, guarantee that coating can not throw away from agitator, the waste of coating can be reduced, ensure that ground is clean.
In above-mentioned coating dispersion machine, described actuating unit comprises motor, drive pulley, driven pulley and belt, described motor is fixed on head, described drive pulley is fixed on the output shaft of motor, described driven pulley is fixed on shaft, and described belt is arranged between drive pulley and driven pulley.
When the power supply of motor is connected, the output shaft of motor drives driver pulley rotation, and drive pulley is rotated by belt drive driven pulley, and driven pulley drives shaft to rotate.
Compared with prior art, the present invention has the following advantages:
1, flame-retardant curtain of the present invention is by selecting specific fire retardant, and passes through the raw material of reasonable compatibility flame-retardant layer, makes flame-retardant layer work in coordination with the good flame retardation effect of generation, thus improves the anti-flammability of curtain, meets other performances such as curtain is attractive in appearance, practical simultaneously.
2, to prepare the method for flame-retardant curtain simple in the present invention, and obtained flame-retardant curtain flame retardant effect is good.
3, the present invention adopts bolt to be threaded in the locating hole on shaft and the locating hole on tube connector tube wall for the preparation of the coating dispersion machine of flame-retardant curtain simultaneously, agitator disk is fixed on shaft, the agitator disk of other models replaceable, easy accessibility, simple to operate, versatility is high.
4, the outer peripheral face place of coating dispersion machine agitator disk is evenly fixed with some lower stirring pieces, stirring piece is provided with between every two adjacent lower stirring pieces, this structure has good shearing peptizaiton, the contact area of agitator disk and coating can be increased simultaneously, stir more fully, enhance productivity.
Accompanying drawing explanation
Fig. 1 is coating dispersion machine perspective view of the present invention.
Fig. 2 is that coating dispersion machine of the present invention removes agitator back plane structural representation.
Fig. 3 is the bung perspective view of coating dispersion machine of the present invention.
In figure, 1, column; 2, base; 3, agitator; 4, bung; 5, shaft; 6, head; 7, lower stirring piece; 8, upper stirring piece; 9, bolt; 10, tube connector; 11, driven pulley; 12, belt; 13, motor; 14, drive pulley; 15, bung one; 16, quick locker; 17, bung two; 18, agitator disk.
Detailed description of the invention
Be below specific embodiments of the invention and by reference to the accompanying drawings, technical scheme of the present invention is further described, but the present invention be not limited to these embodiments.
Embodiment 1
S1, choose commercially available full-cotton fabric and be cut into curtain body, point curtain surface layer and curtain inner side;
S2, take the raw material of flame-retardant layer by the composition of following volume ratio: 718:35%, fire retardant: 32%, titanium dioxide: 9%, foam stabilizer: 22%, crosslinking agent: 0.5%, ammoniacal liquor: 1.5%; Wherein, described fire retardant is that organic fire-retardant and inorganic combustion inhibitor mix by 1:1, organic fire-retardant is halogen system TDE, three (2-chloroethyl) phosphate (TCEP), inorganic combustion inhibitor is aluminium hydroxide, boric acid, and described foam stabilizer is DDAO;
S3, successively the raw material of flame-retardant layer weaving latex, fire retardant, titanium dioxide, foam stabilizer, crosslinking agent, ammoniacal liquor are poured in the agitator of coating dispersion machine and stir 35min under the temperature conditions of 35 DEG C, until forms flame-retardant coatings glue;
S4, by flame-retardant coatings glue obtained in step S3 through uniform in foaming be coated onto curtain inner side surface form flame-retardant layer and obtain flame-retardant curtain semi-finished product, then semi-finished product are placed in baking oven to dry twice at 100 DEG C, each drying time 800min, obtained final products flame-retardant curtain.
Embodiment 2
S1, choose commercially available full-cotton fabric and be cut into curtain body, point curtain surface layer and curtain inner side;
S2, take the raw material of flame-retardant layer by the composition of following volume ratio: 718:35%, fire retardant: 35%, titanium dioxide: 10%, foam stabilizer: 18%, crosslinking agent: 0.2%, ammoniacal liquor: 1.8%; Wherein, described fire retardant is that organic fire-retardant and inorganic combustion inhibitor mix by 2:1, organic fire-retardant is TDE, three (2-chloroethyl) phosphate (TCEP), described inorganic combustion inhibitor is magnesium hydroxide, MAP, and described foam stabilizer is alkylolamides;
S3, successively the raw material of flame-retardant layer weaving latex, fire retardant, titanium dioxide, foam stabilizer, crosslinking agent, ammoniacal liquor are poured in the agitator of coating dispersion machine and stir 30min under the temperature conditions of 30 DEG C, until forms flame-retardant coatings glue;
S4, by flame-retardant coatings glue obtained in step S3 through uniform in foaming be coated onto curtain inner side surface form flame-retardant layer and obtain flame-retardant curtain semi-finished product, then semi-finished product are placed in baking oven to dry twice at 80 DEG C, each drying time 700min, obtained final products flame-retardant curtain.
Embodiment 3
S1, choose commercially available full-cotton fabric and be cut into curtain body, point curtain surface layer and curtain inner side;
S2, take the raw material of flame-retardant layer by the composition of following volume ratio: 718:38%, fire retardant: 32%, titanium dioxide: 12%, foam stabilizer: 16%, crosslinking agent: 0.7%, ammoniacal liquor: 1.3%; Wherein, described fire retardant is that organic fire-retardant and inorganic combustion inhibitor mix by 1:1, organic fire-retardant is three (2-chloroethyl) phosphate (TCEP), and described inorganic combustion inhibitor is aluminium hydroxide, magnesium hydroxide, and described foam stabilizer is DDAO;
S3, successively the raw material of flame-retardant layer weaving latex, fire retardant, titanium dioxide, foam stabilizer, crosslinking agent, ammoniacal liquor are poured in the agitator of coating dispersion machine and stir 40min under the temperature conditions of 50 DEG C, until forms flame-retardant coatings glue;
S4, by flame-retardant coatings glue obtained in step S3 through uniform in foaming be coated onto curtain inner side surface form flame-retardant layer and obtain flame-retardant curtain semi-finished product, then semi-finished product are placed in baking oven to dry twice at 160 DEG C, each drying time 900min, obtained final products flame-retardant curtain.
Flame-retardant curtain obtained in embodiment 1-3 and common curtain of the prior art are compared, result is as shown in table 1.
Table 1: flame-retardant curtain obtained in embodiment 1-3 compares with common curtain of the prior art
Curtain in comparative example is common curtain of the prior art.
In sum, curtain of the present invention not only appearance looks elegant, ABRASION RESISTANCE is good, also has good anti-flammability, and its practical value is very high, and competitiveness is commercially strong.
As shown in Figure 1 and Figure 2, the present invention, for the preparation of the coating dispersion machine of above-mentioned flame-retardant curtain, comprises base 2, base 2 is provided with agitator 3, and agitator 3 adopts stainless steel material to make, and stainless steel material has corrosion resistance, can improve the service life of agitator 3; Agitator 3 top has opening, base 2 is fixed with column 1, and column 1 and base 2 adopt bolt to fix; Column 1 top is fixed with head 6, and head 6 and column 1 adopt bolt to fix; In head 6 by axial restraint and circumference rotate mode be provided with a shaft 5, head 6 is provided with bearing, the outer ring of bearing is fixed in the perforate of head 6, shaft 5 upper end is through the inner ring of bearing, the inner ring of shaft 5 and bearing belongs to excessive cooperation, make shaft 5 can axial restraint and circumference rotate; Shaft 5 straight down, and shaft 5 lower end is in agitator 3 through opening, head 6 is provided with the actuating unit that shaft 5 can be driven to rotate, shaft 5 bottom is fixed with dismountable agitator disk 18, the agitator disk 18 of other models replaceable, easy accessibility, simple to operate; The outer peripheral face place of agitator disk 18 is evenly fixed with some ends lower stirring piece 7 downward, lower stirring piece 7 adopts the mode of welding to be fixed on the outer circumference surface place of agitator disk 18, the quantity of stirring piece 7 is specifically descended to be ten, end upper stirring piece 8 is upward provided with between every two adjacent lower stirring pieces 7, upper stirring piece 8 is all fixed on the outer peripheral face place of agitator disk 18, upper stirring piece 8 adopts the mode of welding to be fixed on the outer circumference surface place of agitator disk 18, and the quantity specifically going up stirring piece 8 is ten.
As shown in Figure 2, the angle between upper stirring piece 8 and the card of agitator disk 18 is obtuse angle, and the angle at such as obtuse angle is 135 °; Angle between lower stirring piece 7 and the card of agitator disk 18 is also obtuse angle, and the angle at such as obtuse angle is 135 °, and this structure has good shearing peptizaiton, the contact area of agitator disk 18 and coating can be increased simultaneously, make stirring more fully evenly, save time, enhance productivity.
As shown in Figure 2, be fixed with the tube connector 10 that inside has passage in the middle part of agitator disk 18, tube connector 10 is fixed on agitator disk 18 by the mode of welding; The tube wall of tube connector 10 offers the connecting hole be connected with inner passage, shaft 5 is located in tube connector 10, and shaft 5 offers the locating hole corresponding with connecting hole, and connecting hole and locating hole all have internal thread, and the size of such as internal thread is M8; A bolt 9 is threaded in connecting hole and locating hole simultaneously, and bolt 9 is the M8 bolt that market can be bought; With bolt 9, agitator disk 18 and shaft 5 are fixed together, guarantee that shaft 5 can drive agitator disk 18 to rotate together.
As shown in Figure 1, Figure 3, agitator 3 is in cylindric, and agitator 3 top is provided with the bung 4 closure of openings can lived, and the external diameter of bung 4 is greater than the external diameter of agitator 3, guarantees that agitator 3 opening can be in closed state, guarantees that coating can not throw away from agitator 3; Bung 4 comprises bung 1 in semicircle shape and bung 2 17, bung 1 and bung 2 17 are provided with quick locker 16, quick locker 16 is the adjustable quick locker that market can have been bought, such as receive and converge board NRH-5619C adjustable quick locker, bung 1 and bung 2 17 can be fixed together by quick locker 16 is combined into a complete bung 4; Offer the breach one in semicircle shape and breach two in the middle part of bung 1 and bung 2 17 respectively, the size of breach one and breach two is greater than the size of shaft 5 and breach one and breach two are provided with rubber ring, guarantees that coating can not throw away from agitator 3.
As shown in Figure 2, actuating unit comprises motor 13, drive pulley 14, driven pulley 11 and belt 12, and motor 13 is the motor that market can have been bought, such as the U400/80-220 motor of micro-special board; Drive pulley 14 and driven pulley 11 adopt forging type to process, and cost is lower; Motor 13 is fixed on head 6, and drive pulley 14 is fixed on the output shaft of motor 13, and the mode that drive pulley 14 adopts key to be connected with the output shaft of motor 13 is fixed together, and guarantees that the output shaft of motor 13 can drive drive pulley 14 to rotate together; Driven pulley 11 is fixed on shaft 5, and the mode that driven pulley 11 adopts key to be connected with shaft 5 is fixed together, and guarantees that driven pulley 11 can drive shaft 5 to rotate together; Belt 12 is arranged between drive pulley 14 and driven pulley 11, and make drive pulley 14 driven pulley 11 can be driven to rotate by belt 12, belt 12 is the V belt that market can have been bought, such as wind leopard plate Z560 V belt.
The present invention is as follows for the preparation of the operation principle of the coating dispersion machine of above-mentioned flame-retardant curtain, the tube connector 10 of agitator disk 18 is penetrated into the lower end of shaft 5, the locating hole that rotation agitator disk 18 makes shaft 5 be provided with is corresponding with the connecting hole on the tube wall of tube connector 10, be threaded in connecting hole and locating hole with bolt 9 simultaneously, agitator disk 18 is fixed to shaft 5 bottom, agitator 3 is placed on base 2, agitator disk 18 is made to be in agitator 3, to the coating stirred be needed to be poured in agitator 3 again, the bung 1 of semicircle shape and bung 2 17 are covered the opening part at agitator 3 respectively, by quick locker 16 bung 1 and bung 2 17 be fixed together and be combined into a complete bung 4, agitator 3 opening is made to be in closed state, when the power supply of motor 13 is connect, the output shaft of motor 13 drives drive pulley 14 to rotate, drive pulley 14 drives driven pulley 11 to rotate by belt 12, driven pulley 11 drives shaft 5 to rotate, shaft 5 drives agitator disk 18 to rotate together, agitator disk 18 drives upper stirring piece 8 to rotate together with lower stirring piece 7, coating in upper stirring piece 8 and lower stirring piece 7 pairs of agitators 3 stirs.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.

Claims (7)

1. a preparation method for flame-retardant curtain, is characterized in that, the method comprises the following steps:
S1, choose commercially available calico and be cut into curtain body, point curtain surface layer and curtain inner side; Have additional flame-retardant layer in curtain inner side, flame-retardant layer is grouped into by the one-tenth of following volume ratio: weaving latex 718:35%, fire retardant: 35%, titanium dioxide: 10%, foam stabilizer: 18%, crosslinking agent: 0.5%, ammoniacal liquor: 1.5%; Described fire retardant is that organic fire-retardant and inorganic combustion inhibitor mix by 1-2:1, described organic fire-retardant is one or more in halogen system, phosphate, halogenated phosphate, a hexabromo water prose style free from parallelism, ten bromo-antimonous oxide flame-retardant systems, and described inorganic combustion inhibitor is one or more in aluminium hydroxide, magnesium hydroxide, MAP, Diammonium phosphate (DAP), ammonium chloride, boric acid.
S2, take the raw material of flame-retardant layer by the composition of volume ratio described in S1;
S3, successively the raw material of flame-retardant layer weaving latex, fire retardant, titanium dioxide, foam stabilizer, strand refining agent, ammoniacal liquor are poured in the agitator of coating dispersion machine and stirred, until forms flame-retardant coatings glue;
S4, by flame-retardant coatings glue obtained in step S3 through uniform in foaming be coated onto curtain inner side surface form flame-retardant layer and obtain flame-retardant curtain semi-finished product, then semi-finished product are placed in baking oven and carry out twice oven dry, obtained final products flame-retardant curtain.
2. the preparation method of flame-retardant curtain according to claim 1, it is characterized in that, the mixing time described in step S3 is 30min-40min, and whipping temp is 30-50 DEG C, bake out temperature described in step S4 is 50-160 DEG C, each drying time 700min-900min.
3. the preparation method of flame-retardant curtain according to claim 1, it is characterized in that, coating dispersion machine in step S3 comprises base, described base is provided with agitator, described agitator top has opening, described base is fixed with column, described column top is fixed with head, in described head by axial restraint and circumference rotate mode be provided with a shaft, described shaft straight down, and shaft lower end is in agitator through described opening, described head is provided with the actuating unit that shaft can be driven to rotate, it is characterized in that, described shaft bottom is fixed with dismountable agitator disk, the outer peripheral face place of described agitator disk is evenly fixed with some ends lower stirring piece downward, end upper stirring piece is upward provided with between described every two adjacent lower stirring pieces, upper stirring piece is all fixed on the outer peripheral face place of agitator disk.
4. coating dispersion machine according to claim 3, is characterized in that, the angle between described upper stirring piece and the card of agitator disk is obtuse angle, and the angle between described lower stirring piece and the card of agitator disk is also obtuse angle.
5. coating dispersion machine according to claim 4, it is characterized in that, the tube connector that inside has passage is fixed with in the middle part of described agitator disk, the tube wall of described tube connector offers the connecting hole be connected with inner passage, above-mentioned shaft is located in described tube connector, described shaft offers the locating hole corresponding with described connecting hole, and connecting hole and locating hole all have internal thread, and a bolt is threaded in connecting hole and locating hole simultaneously.
6. coating dispersion machine according to claim 5, it is characterized in that, described agitator is cylindric, described agitator top is provided with the bung described closure of openings can lived, described bung comprises bung one in semicircle shape and bung two, described bung one and bung two are provided with quick locker, offer the breach one in semicircle shape and breach two in the middle part of described bung one and bung two respectively.
7. coating dispersion machine according to claim 6, it is characterized in that, described actuating unit comprises motor, drive pulley, driven pulley and belt, described motor is fixed on head, described drive pulley is fixed on the output shaft of motor, described driven pulley is fixed on shaft, and described belt is arranged between drive pulley and driven pulley.
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