JPS59212849A - Manufacture of toner - Google Patents

Abstract

PURPOSE:To manufacture a toner which maintains image density for a long period by sphering and classifying the powdered toner. CONSTITUTION:A toner sphering device 9 which performs the process of sphering toner is connected between the toner discharge part 7 of a powdering device 5 and the intake 8 of a cyclone separator 1. Thus, a looped circulating process is formed from the discharge part 7 to the intake 8, and a sharp angled part of toner powder caused by the device 5 is rounded by the toner sphering device 9; and only the sphered toner powder is sent to the separator 1 and sent out of the system through a fine-powder outlet 2, so that the sphering of finished products is accelerated extremely.

Description

DETAILED DESCRIPTION OF THE INVENTION A. The invention relates to a jliQ production method for toners 1 to 4 for use in a multi-function machine, and in particular to a method for making toner into spherical toner particles in a conventional toner machine. Add culm and draw (j4: R of maturity
: (Good retention performance;', 1: This relates to a method for manufacturing l・s=-. Conventionally, 1・s used in copying machines.
When manufacturing a mold, a mold release agent is added to carbon, dye, resin, etc., and then the powder is added. d Mix in a kneading machine, cool and solidify, and then pulverize, classify fine powder toner below a certain level of precision, and further perform surface treatment or add additives to this toner as necessary. 1. So powder is obtained as a product.

However, as mentioned above, when using solid toner.

It is known that, when viewed microscopically, a powdered toner obtained by pulverization generally has sharp, angular protrusions on its outer surface. It is known that when a copying machine is used for an IQ period, the image density generally decreases due to η-marking, but one reason for this phenomenon is the angles formed on the outer surface of the toner powder as described above. It has recently become clear that this is due to the occurrence of this disease.

Therefore, the present invention consists of the two steps of pulverizing and classifying toner powder in the conventional method. The purpose of this project is to provide a toner production method that can efficiently produce spherical donor powder by rationally connecting these processes, as well as providing 2Ji processes for spherical donor powder. The process of classifying the toner and the one culm that crushes the toner constitute a loop-shaped circulating system, and the crushed constant o; After the pulverization step (1), 1.su~ is converted to a spherical specific gravity of 2.1. Insert the culm, 1
・This method provides 14 manufacturing methods, characterized by the fact that it is made into spheres after being crushed, and then classified.

Next, with reference to the accompanying drawings, the present invention will be explained in concrete form, and will be explained by referring to an example, thereby providing an understanding of the present invention.

Second, FIGS. 1 and 2 show the crushing tools that can be used directly (, ',, '', ", 1. An example of a manufacturing device having a classification device and a toner spheronizing device is shown. Figure 4 and Figure 5 Gj, respectively 3rd
Figure 6 shows the air bleed device in close-up view 9, and Figure 7 shows an example of the spherical forming device. 8(a) and (b) are side sectional views showing an example of the airflow swirling device attached to the I-S spheronizing device, and FIG. (a) and (b) are side views each illustrating a horizontal toner spheroidizing device.

In Fig. 1 and Fig. 2, ゛(, ■ is a cyclone separator, which is a type of classification device, and it has a cyclone separator on the side thereof. It has a coarse powder discharge section 4 connected thereto.

1. The conveying pipe 3 is connected to the inlet 6 of the crushing device 5 provided below the cyclone separator 1, and the crushing device 5 receives the raw material crushed by the crushing device 5. 1. For taking out, use the discharge section 7 or 6.

In the conventional toner manufacturing apparatus, this toner discharge section 7 is directly connected to the cyclone separator IQ) l-su-intake 118 of the toner section in a loop shape,
ζ The crushed toner powder is Zykuji! separator 1
However, in the present invention, only the toner particles having a certain particle size or more are taken out of the system from the fine powder outlet 2 without being spherical. A toner spheroidizing device 9 is connected between the discharge section 7 and the toner intake 118 of the zigzag 1 and the inseparator 1, which controls the J and L shape forming process.

The toner spheroidization device 9 is connected only between the toner discharge section 7 and the toner intake port 8 as described above, and the coarse powder discharge section 4 of the cyclone separator 1 and the crushing device 5. Coarse powder inflow: between r1<6, that is, 9J at the middle of the conveyor pipe 3
llno? In the meantime, one use is crushed, in this case seven times spherical and rounded. The end of the toner that hits the corner is discharged from the separator 1,
1. The effect of the spheroidizing device 9 is significantly reduced.

Like this fish box 1 figure and the toner raccoon 1 apparatus shown in figure 2, the crushing device F? 1~su- crushed in 5.
Su-()l' +, from L1 part 7 to cyclone separator 10) Without returning to l-su-intake 1-18, in the middle of the pipe 1-trough, loop the 1-su-spheroidizing device 9. The corner of the toner powder having a corner is formed to form a process that circulates in the form of 1. Only the 1-ner powder that has been rounded in the spheroidizing device 9 and thus spheroidized is sent to the cyclone separator 1, from which it is sent to the fine powder outlet 2.
Since the product is taken out of the system through this process, the spheroidization of the product taken out is significantly promoted.

By the way, is it a toner spheroidizing device? 1″9 I・ner supply ``111
and the inside 7 of the toner pulverizing device 5 are connected by a conveying pipe 10, and the toner forming device 1]
The toner discharge port 1] 12 of the cyclone separator 1 is connected to the toner intake port 8 of the cyclone separator 1 by an I feed pipe 13. A supply pipe 14 for supply is connected.

Therefore, from this supply pipe 14, the cyclone separator I is introduced into the bone canal 3! The 1-s-coarse powder that has flowed in due to the use flows into the cyclone separator 1 from 1 to 1 inlet 1.1+8, rotates inside the cyclone separator 1 on a 1M airflow with It collides with the side wall of
4 through the conveying pipe 3 and the coarse powder flow part 6'(, J''J
1. After being finely pulverized in the crusher 5, it enters the crusher 5 and is then finely crushed in the crusher 5.
(After being subjected to the spheronizing action described in detail,
+I'+1112, the toner flows through the circular feed pipe 13, and flows into the like 1-1 separator 1 again from the toner intake 1-18. The powder of Koushi (1'lIQ cycle 1-Junseparl/-1) which flowed into the 1st part is finely ground in the grinding device 5, and is also crushed in the 1-piece forming device 9. Its corners are rounded and l, 'ij, 1F11 is small 20, so the centrifugal force is small and the centrifugal force is small. It is something that can be taken out of the system.

Supply pipe 1 of the above 1. S-phase 1' supplying force 2')
4G, 1, Pumping': ", 3 YL (L 2 connection) is also possible TeiP): 4+, as shown in Figures 1 and 2, Zaik I: I-1! Parameter By connecting to the conveying pipe 13, which is most exposed to negative pressure of 1, the flow of 1 and 15) in the supply pipe 14 is also increased.
), there is no clogging in the supply pipe 14.

The classification device used in the present invention is not limited to the cyclone separator as described in 1-1, but also the centrifugal separator.
, a filter, or other well-known devices can be used, and a well-known crushing device 5 can also be used.

Next, the structure and operation of the toner spheroidizing device 9 will be described in detail. Figure 3 4J, 1/S-Spheronization device H
This shows an example of the internal structure of °'+°9, in which case 1
・S-Spheronizing device 9 is approximately circular ↑C1 outside ↑C115
Outer kite tube 1 coaxial with the outside ↑, ↑115 in the inner center
6, this outer guide F cylinder 16 has a structure in which the lower end is closed and one end is open.
, tr 16's "-01) 1 open l" part 17 with quality side guide ↑, ? It is coaxial with j16, and its F, lI::+ is inserted through the gap 19 through the inner kite '11t118 which communicates with the above-mentioned 1 to 11 old-112, and this inner guide One end of F"5T118 is open, and the inner space 18d of the inner guy +;f;?r+8
and the internal space 16.1 of the outer kite i'3116 are
Above inner guide ↑8j18 1ζ & iM 1i11-'
The first part 20 communicates with the other.

] Notes (outside of the separate kite tube 18 (into the separate guide tube 16); - Input: Negative pressure inside the inner kite ft?i 18, inner and outer kite 'i', ?118, 16 It is set according to various conditions such as dimensions, and is made variable as necessary.

Further, a toner supply “Jl,” connected to the first general feed pipe 10,
l L; l, one is placed in the outer Tif+15 and communicates with the space 15.1 inside the outer cylinder 15, and this outer cylinder 15 has a ni, outside↑l
′? Space within 115 15. , a plurality of air nozzles 21 protruding inward are attached.

, the second air nozzle 21 is shown in Figures 4 and 5.
'Old 1' 11 The old 1 is tilted downward towards the 7 and the fat lid L
, compressed air injected from the air nozzle 21, or external f3i
15, and the toner powder flowing into the outside Tii'+15 from 1 to 1 supply 1-111, the swirling oki・li
This is to give l+.

i outside ↑+l The lower end of 15 has a cross section g of 61 towards the T horn as shown in Figure 3! It is desirable that the Taper surface 22, which is smaller than y, be formed in the shape of its own base circle 1 (r-shape).

From the air nozzle 21, a downward air flow yC1 is always emitted in the circumferential direction (as shown by the arrow 23), and the toner powder that has flowed in from the toner supply port 11 rides on this swirling flow and swirls at a high speed to the outside. The inner surface of the cylinder 15 and 14.i collide,
As the toner particles fit together, the sharp corners on the powder surface are worn away and rounded, and the powder as a whole becomes spherical, descending along the inner surface of the outer cylinder 15, and eventually forming the tabular surface 22. By turning along the inner surface, its turning diameter is narrowed, and the outer fIi'+15 lower Iγ;i"6
It collides with the outer guide ↑1tr 16, reverses to a swirling flow of +-lid, and ascends l- while turning around the outer guide ↑1tr 16. 1 of the above nosle 21 to force this 1-rising current to lJ+
- Generation of swirling airflow by force] 1: A nozzle in the horizontal direction may be added.

- force, space inside the inner guide cylinder 18 j8. ．． 1) 11
As noted, Xi 1:1 separator 1 and Xi! jl
The outer guide ↑51 is connected to the sliding toner discharge 1-: ] 12 and is in the 11 pressure state.
Of 16 (No. 11 space 16, 1 and both guides ↑31+
119 between 6.18 and 18 is also exposed to negative pressure, and the toner powder that has come along the outer guide l, 19, as shown by the arrow 24, and the space 16.1 in the outer guide section 16 and the inner (rule chi 1'↑C11
Pass through 18a between 9F in 8 to 1.S-(]1 exit kl 1
2) General feed pipe 13 and 1.S-intake ll3)
After that, it flows into the cyclone separator 1 7, of which a certain number of particles, the following 15), are 1? Sunko J1 So1
1 is discharged from the old 12 to the outside of the system.

1゛ki (7) J: UGko, Uchii (111 Kai f”Ti
The negative pressure in the space 188 is applied to the space I5□ in the space 188 via If you connect this directly to the space 15. with a strong force, this air flow will be generated by the air nostle 21, and the end of the air will be sucked into the space 18a. (L, good, 1 to 4 in space 15.) The turning point at the end of the rotation, and therefore the number J, is because the spherical function is no longer performed, and the /:) is slightly Due to the fluid resistance 111i passing through the gap 19 narrowed to νj, the outer kite 'il? i L
It is necessary to limit the degree of negative pressure that flows into the 11 part 17 between the 1 end of the 6, and it is necessary to adjust the strength of the fluid resistance in such a gap 19 to an appropriate V (one work is required, Therefore, it is necessary to appropriately determine the length ρ in the vertical direction of the L gap 19 and the thickness d thereof.

Note that the number of air nozzles 21 mentioned in 1-1 can be two in the circumferential direction as shown in FIG. 5, or one can be provided in the circumferential direction as shown in FIG. , further space 158
In order to strengthen the swirling flow inside, a large number of air nozzles 21.1 may be arranged along the outer cylinder 15 as shown in FIG.

B11, air nozzle 21 or 2 as shown in the figure.
When the flow rate of air from 1□ increases, the amount of air i+f flowing into spaces 16., .18.
When this occurs, the degree of negative pressure applied to the inseverator 1 is weakened, and its classification function is An air venting device 25 is interposed in the air release device 25.
It is desirable to maintain the negative pressure inside 3. In Fig. 6, a 1.
A state in which an air pumping device 25 is connected to j''9 is shown.

” (As a uV mechanism for actively raising the toner powder that has reached the part 26, the mechanism shown in FIG. 8 (2) and (b) is also considered, and the mechanism shown in FIG. 8 (a) is motor 2
A vane 29 is mounted on the outer periphery of a vertical shaft 28 rotated by
spirally wound (by rotating the shaft 28 in the direction of the arrow 3o by the motor 27, a swirling airflow in the 1-direction is generated at the center of the outer cylinder 15 by the spiral blade 29) 1 :I try to make it happen 4).

In addition, t) shown in the same figure (1)) is the bottom part 2 of the outer cylinder 15.
Rotated around the vertical axis by B-ta 27 to fi-
4'Plu, 1 propeller; Attach 31, and this propeller 3
By the rotation of 1, an ascending air flow is generated.

'False - All of the toner spheronizing devices mentioned above are of the vertical type in which the outside ↑θi15 stands directly to the east, but the spheronizing devices that can be used in the present invention are of the AM type and 14
1. ! It is not specified, but outside ↑ as shown in Figure 9.
C132 is arranged horizontally, and 7-ri 33 is placed in the center.
It rotatably supports a shaft 34 that is rotated by a shaft 34, and this shaft 34 is made of pins, blades, etc. The toner powder flowing from the outer cylinder 32 from the toner supply port 11 to the discharge port 12 is collided with the rotating collision element 35 to make it spherical. As shown in FIG. 9(b), the outer cylinder 3
A baffle plate 36 is provided at a suitable place inside the powder to provide resistance to the flow of the powder,
7) l! j'i (Y/ It is also possible to extend the distance between Il and Il by 1 to increase the chance of f+i collision with the collision element 35 and to reduce the effect of sphericity!14.)

As described above, the present invention operates in a closed loop through the steps of classifying I-ner and pulverizing I-ner.
lIi constitutes the remaining thread, 1'5) crushed i;? i4'Al~1-ner without taking it out of the system! In the judgment method, 1.
9. Insert the step of converting into spherical He, pulverize 1 to 3, make them spherical, and then classify them.
Since this is a toner manufacturing method that has a characteristic of It is possible to produce a toner that can reduce the image density between 1 and 11 times.

[Brief explanation of the drawing]

11th 1 and 2 show toner manufacturing 77 according to the present invention.
7. A front view showing an example of a toner manufacturing apparatus having a grinding device, a classifier and an I. Lee spheronizing device which can be used directly for carrying out the process. Iz and side view, Figure 3 is 1
Note 1-J--The side view of the LE type retrofitting, FIGS. 4 and 5 are
Figure 7 is a side view showing an example of a spheroidizing device connected to a air extraction device; Figures 1 and 2) and (b) respectively show an example of a side UJ
r side view, 1st) Figures (, J) and (b) 4; l, respectively, are side views of the horizontal 1. i: i”v explanation) 1...+J-iku 1J inseparator (classifying device) 5.
...4'5) Crushing 1°I'...l'J shape device 1
5... Sleepover 18... Inner guide tube 1
6...Outer guide cylinder 19...Gap. Applicant Sanda Kogyo Co., Ltd. Agent Patent Attorney Takeyu Honjo No. 1 I Figure 2 Figure 3 Figure 4/18 21 ? :5F, :Q ]8 1) 3 Figure 6 5 , J Figure 7 213 ＼ノ

Claims (1)

[Claims] 1. Circulate in a closed loop through the process of classifying the toner and the culm that crushes the toner! In the toner manufacturing method, the pulverized fine toner having a particle size below a certain particle size is not taken out of the system, and after the pulverization step 1. 1. A manufacturing method characterized in that the toner is 1'5) crushed, spheroidized, and then classified.