JP3102902B2 - Collision type supersonic jet crusher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an impingement type supersonic jet pulverizer using a high-pressure gas as a jet stream, and more particularly to an impingement type supersonic jet pulverization for pulverizing an object to be crushed into coarse particles. About the machine.

Conventionally, for example, in a dry-type electrophotographic copying machine, a toner in which a resin or the like is finely powdered is used as a developer.

[0003] Such a toner is also known as dry toner for electrostatic image, which is a resin, a dye, a pigment and melting and kneading with heat roll mill, cooled, coarsely crushed by using a jaw crusher or the like, the It is formed in such a manner that the coarsely pulverized material is finely pulverized by a supersonic jet pulverizer.

FIG. 11 shows an example of a supersonic jet pulverizer for pulverizing an object to be pulverized such as a resin into toner particles. Japanese Patent Application Laid-Open No. 58-143853 discloses a crusher in which the main parts of the crusher shown in FIG.
Publication, Japanese Utility Model 51-100574, JP-A No. 2-6
8155 JP, there is JP-A 1-254266 JP.

[0005] In FIG. 11, a material to be ground Ta such as a resin that has been coarsely ground is charged from a raw material charging side indicated by reference numeral 1, and is guided into a classification process chamber 3 through a passage 2. The finely pulverized material Ta that has exited the classification process chamber 3 travels through the passage 4 to the jet jet flow path 5.

On the other hand, high-pressure air is jetted from the nozzle 6 through the compressed air flow path, and a supersonic jet flow is generated in the jet injection flow path 5 by air. A collision plate 7 is provided facing the nozzle 6 in the flow direction of the jet flow.

The material to be ground coming out of the passage 4 is guided to a jet stream, rides on the jet stream, and has a high speed (ultra high speed).
While colliding with the collision plate 7, and further secondary collision with the side surface 8.

The crushed object Ta, which is coarse particles, collides with the collision plate 7 at a supersonic speed and then secondary collisions with the collision plate 8,
Pulverized into fine particles.

That is, the material to be crushed becomes fine powder like toner to be used for development, and the fine powder Tp passes through the passage 10 from the crushing chamber 9 and together with the material to be crushed Ta in the passage 2 to form a classification process chamber. Sent to 3.

[0010] Of the crushed material Ta and the fine powder Tp sent to the classifying process chamber 3, the latter fine powder is recovered as a product in the direction of the arrow, and the former crushed material Ta passes through the passage 4 again into the jet flow path. 5 and is crushed by the collision plate 7.

As described above, the material to be pulverized is pulverized. Since the pulverization is performed by colliding the material to be crushed against the collision plate, this type of supersonic jet crusher is used in the collision type. It is called a supersonic jet crusher.

The pulverization of the object to be pulverized by such a jet pulverizer is performed by collision between particles sucked into the jet stream or by collision with a collision plate.

According to the manufacturing process described above, the fine powder is 1
It is classified and sorted to a size of less than 00 μm and used for use. In this case, the feed amount is adjusted to meet the required quality such as toner particle size, yield value, (collected toner amount / input amount) and the like. It is known that the (supply amount), the pulverizing air pressure, the pulverizing air flow rate, the shape of the collision plate, the shape of the secondary collision plate, and the like most affect the quality.

The impingement plate has the best pulverizability when it is a flat type impingement plate arranged in a direction orthogonal to the direction of the jet flow. Here, the pulverizability refers to a processing time for obtaining a toner having a constant particle size distribution.

[0015]

[SUMMARY OF THE INVENTION However, there is a desire to create a low-cost toner for the purpose of the current high efficiency grinding, to create such a toner by the above pulverizer, pulverizing capacity 11 in In the relationship between the jet nozzle 6 and the connection method of the jet jet flow path 5, a collision wave is generated due to a step (joint) and the acceleration inside the jet jet flow path is reduced, so that the collision energy at the collision plate 7 is reduced. Therefore, there is a problem that the processing capacity of the crusher is not utilized to the maximum.

It is known that the pulverizing ability can be improved by adjusting the conditions of the classifying process chamber 3, the air pressure at the jet jet nozzle 6, and the distance of the collision plate 7 in FIG.

However, since the supply port 5a of the jet injection channel 5 leading to the pulverizing chamber is narrow, the object to be pulverized
May accumulate and cause clogging, and capacity may not be utilized to the fullest.

[0018] For further narrow supply port 5 a of jet flow path for guiding the grinding chamber, grinding object is a small amount passing through, micronized proceeds due to excessive grinding, the yield reduction of the product in question.

[0019]

In order to solve the above problems, a collision type supersonic jet crusher according to the present invention comprises a jet nozzle for jetting a jet jet into a crushing chamber, and a jet for supplying an object to be crushed to the jet jet. In a collision type supersonic jet pulverizer having a jet flow path and a collision plate provided at a position facing the jet nozzle, the jet nozzle and the jet jet flow path are integrated.

Preferably, the jet flow path is formed of a metal material and the surface thereof is subjected to a lining treatment.

Preferably, the jet nozzle is provided with an attachment, and the jet jet discharged from the jet nozzle is freely adjusted by the attachment.

[0022]

The above collision type supersonic jet crusher is provided with a jet nozzle for jetting a jet jet into a crushing chamber, a jet jet flow path for supplying an object to be crushed to the jet jet, and a collision provided at a position facing the jet nozzle. In the collision type supersonic jet crusher comprising a plate and the jet nozzle, the jet nozzle and the jet jet flow path are integrated, so that the generation of a shock wave by the jet jet in the jet jet flow path is suppressed ,
Supply port for supplying the material to be crushed provided in the jet flow path
Has a long axis that is almost the same as the flow direction of the jet jet
The elliptical shape allows for a wide supply area
You.

Since the jet jet flow path is formed of a metal material and has a lining treatment on the surface, the strength, corrosion resistance and wear resistance of the flow path through which the jet jet flow passes are improved.

The jet nozzle is provided with an attachment, and the jet jet discharged from the jet nozzle is freely adjusted by the attachment, so that the collision energy of the jet jet to the collision plate can be set as desired. .

[0025]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic explanatory view showing a main part of a collision type supersonic jet crusher according to the present invention, and FIG. 2 is a perspective view showing an integral component of a jet nozzle and a jet jet flow path mounted on the crusher of FIG. FIG. 3 is a front view thereof.

The material to be crushed Ta passes through the passage 4 and is supplied to the supply port 5a.
The flow further proceeds to the jet injection channel 5. This jet jet channel 5
Is connected to the integrated jet ejection nozzle 6, the acceleration is increased by the jet airflow. Passage 5
No shock wave is generated in b, and the object to be crushed further increases its speed and collides violently with the opposing shock plate 7, so that the crushing ability increases.

The material of the integrated jet flow path is made of SUS44 which is excellent in machining accuracy, strength, corrosion resistance and wear resistance.
A base material having a surface of titanium carbide lining based on 0-C was used.

[0028] Example 1 polyester resin 15 parts by weight, a mixture of phthalocyanine pigment 5 parts by weight (softening point 80 ° C.) was molten kneaded with hot roll mill to a resin consisting of 85 parts by weight styrene-acrylic resin After cooling, coarsely pulverized with a jaw crusher was finely pulverized using a pulverizer having an air pressure of 6.5 kg / cm ² and an air flow rate of 10 m ³ / min using an integrated jet jet nozzle and jet jet flow path. However, in order to obtain a fine powder having a volume average particle size of 11.0 μm, a material to be ground at 68 kg / Hr per hour could be supplied. In addition, a Coulter counter was used as a particle size distribution measuring device.

[0029] Example 2 polyester resin 75 parts by weight, a mixture of phthalocyanine pigment 5 parts by weight (℃ softening point 69) and molten and kneaded in hot roll mill to a resin consisting of 15 parts by weight styrene-acrylic resin After cooling, coarsely pulverized with a jaw crusher was finely pulverized by using a pulverizer having an air pressure of 6.0 kg / cm ² and an air flow rate of 10 m ³ / min using an integrated jet jet nozzle and jet jet flow path. However, in order to obtain a fine powder having a volume average particle diameter of 12.0 μm, a material to be ground at a rate of 95 kg / Hr per hour could be supplied.

COMPARATIVE EXAMPLE 1 The same material to be pulverized as in Example 1 and fine pulverization with a pulverizer of the same type using a nozzle having a jet jet nozzle and a jet jet channel connected to each other showed fine powder having a volume average particle diameter of 11.0 μm. 60 kg of material to be ground per hour could be supplied in order to obtain the same.

COMPARATIVE EXAMPLE 2 The same material to be pulverized as in Example 2 and fine pulverization using the same type of pulverizer and a nozzle connected to a jet jetting nozzle and a jet jetting flow path resulted in fine powder having a volume average particle diameter of 12 μm. 85 kg of material to be crushed could be supplied to obtain. A summary of the results in Examples 1 and 2 and Comparative Examples 1 and 2 is as shown in Table 1.

[0032]

[Table 1]

FIG. 4 is a perspective view showing an example of an ejection nozzle provided in the crusher, FIG. 5 is a front view thereof, FIG. 6 is a perspective view of an attachment engaged with the ejection nozzle shown in FIGS. FIG. 7 is a front view, and FIG. 8 is an explanatory diagram showing the ejection nozzle diameter of the ejection nozzle shown in FIG.

The ejection nozzle 6 has a sectional area of 50 to 20 depending on the material to be crushed by attaching a special attachment shown in FIG.
The jet air whose flow rate has been increased by expanding the cross-sectional area of the narrowing portion 6b of the jet nozzle can fly through the jet jet flow path 5 at a high speed and collide with the collision plate 7, A significant increase in crushing capacity is achieved.

The diameter of the narrowing portion 6b of the ejection nozzle in FIG. 8 is conventionally set to 1 / 2.8 of the diameter of the outlet of the injection channel, but when this value is set to 100%, it is within the range of 100% to 200%. It is most preferable to select a value within the range of 120% to 150%. The expansion of the cross-sectional area of the diameter of the ejection nozzle increases the air flow rate, increases the energy that collides with the collision plate, and reduces the crushing ability to 20% to 50%. %.

EXAMPLE 3 A phthalocyanine pigment 5 was added to a resin comprising 15 parts by weight of a polyester resin and 85 parts by weight of a styrene acrylic resin.
A mixture of parts by weight (softening point: 80 ° C.) was melt-kneaded by a hot roll mill, cooled, coarsely ground by a jaw crusher, the cross-sectional area of the jet nozzle was increased to 130%, and the air flow rate was increased to 6. Attachment of 13 m ³ / min at 5 kg / cm ² was attached and pulverized to obtain a fine powder having a volume average particle diameter of 12 μm.
kg of material to be ground could be supplied. The crusher used had a maximum air consumption of 10 m ³ / min.

Embodiment 4 Using the same toner material as in Embodiment 1, the cross-sectional area of the jet nozzle was increased to 140%, and the air flow rate was increased to 6.5 kg.
Attachment of 14 m ³ / min / cm ² was attached and pulverized, and 70 kg per hour could be supplied to obtain fine powder having a volume average particle diameter of 12 μm.

Example 5 Using the same toner material as in Example 1, the cross-sectional area of the jet nozzle was increased to 150% and the air flow rate was increased to 6.5 kg /.
Attachment of 15 m ³ / min in cm ² was attached and pulverized. As a result, 76 kg of material to be ground per hour could be supplied to obtain fine powder having a volume average particle diameter of 12 μm.

Example 6 A phthalocyanine pigment 5 was added to a resin composed of 75 parts by weight of a polyester resin and 15 parts by weight of a styrene acrylic resin.
A mixture of parts by weight (softening point: 69 ° C.) was melt-kneaded by a hot roll mill, cooled, coarsely ground by a jaw crusher, the cross-sectional area of a jet nozzle was increased to 120%, and the air flow rate was increased to 6. Attachment of 6 m ³ / min at 0 kg / cm ² was attached and finely pulverized to obtain a fine powder having a volume average particle diameter of 10 μm.
g of the material to be ground could be supplied. The crusher used had a maximum consumption air flow rate of 5 m ³ / min.

Example 7 The same toner material as in Example 6 was used, the cross-sectional area of the jet nozzle was increased to 140%, and the air flow rate was increased to 6.0 kg.
Attachment of 7 m ³ / min / cm ² was attached and finely pulverized, and 37 kg per hour could be supplied to obtain fine powder having a volume average particle diameter of 10 μm.

Example 8 Using the same toner material as in Example 6, the cross-sectional area of the jet nozzle was increased to 200%, and the air flow rate was increased to a pressure of 6.0 kg /.
Attachment of 10 m ³ / min in cm ² was attached and pulverized, and 45 kg per hour could be supplied in order to obtain fine powder having a volume average particle diameter of 10 μm.

Comparative Example 3 The same toner material as in Example 3 was used, the cross-sectional area of the jet nozzle was 100% of the current state, and the air flow rate was 6.4.
When the powder was finely pulverized with a pulverizer of 10 m ³ / min at kg / cm ² to obtain a fine powder having a volume average particle diameter of 12 μm,
50 kg of material to be ground per hour could be supplied.

Comparative Example 4 The same toner material as in Example 6 was used, and the cross-sectional area of the jet nozzle was 100% of the current area, and the air flow rate was 6.5.
When finely pulverized with a pulverizer of 5 m ³ / min at 4 kg / cm ^2, it was necessary to obtain a fine powder having a volume average particle size of 10 μm.
25 kg of material to be ground per hour could be supplied. Table 2 shows a summary of the results in Examples 3 to 8 and Comparative Examples 3 and 4.

[0044]

[Table 2] (Note) In Examples 3, 4, and 5, the processing capacity of Comparative Example 3 was set to 1. In Examples 6, 7, and 8, the processing capacity of Comparative Example 4 was set to 1.

FIG. 9 is a perspective view showing an example of a jet flow path provided in the crusher, and FIG. 10 is a front view thereof.

In FIGS. 9 and 10, the jet flow path is characterized in that the upper part thereof has an ellipse such that the supply port 5a has a long axis in the flow direction, and the jet injection flow path 5b
And has a wider cross-sectional area than a perfect circular shape. In FIG. 9, 5c is an inlet, and 5d is an outlet.

Example 9 A mixture of 15 parts by weight of a polyester resin and 85 parts by weight of a styrene acrylic resin mixed with 5 parts by weight of a phthalocyanine pigment (softening point: 80 ° C.) was melt-kneaded by a hot roll mill. After cooling, coarsely pulverized with a jaw crusher was finely pulverized using a pulverizer with an air pressure of 6.5 kg / cm ² and an air flow rate of 10 m ³ / min, with the supply port of the jet ejection path expanded to 150%. However, in order to obtain fine powder having a volume average particle size of 11.0 μm, 60 kg of material to be ground per hour could be supplied, and no clogging occurred. At this time, the content of the ultrafine powder of 5 μm or less was 55.25 in number percent. In addition, a Coulter counter TA-II was used as a particle size distribution measuring device.

Example 10 The same toner material as in Example 9 was used, and the supply port of the jet injection channel was expanded to 130%, and then finely pulverized to obtain fine powder having a volume average particle diameter of 11.0 μm. 1
An object to be crushed was supplied at a rate of 59 kg / Hr per hour, and no clogging occurred. At this time, the content of ultrafine powder of 5 μm or less was 57.58 in number percent.

COMPARATIVE EXAMPLE 5 When the powder was pulverized under the same conditions as in Example 9 with the jet jet flow path and the supply port being 100% circular in shape, 59 kg / Hr material was supplied in order to obtain 11 μm fine powder. 5μ
The following ultrafine powder content was 60.00 in number percentage, but clogging occurred in the passage after 60 minutes, making it impossible to continue pulverization. Table 3 summarizes the results of Examples 9 and 10 and Comparative Example 5 described above.

[0050]

[Table 3]

[0051]

As described above, the collision type supersonic jet pulverizer of the present invention comprises a jet nozzle for jetting a jet jet into a pulverizing chamber, a jet jet flow path for supplying an object to be pulverized to the jet jet, and the jet nozzle. In the collision type supersonic jet crusher provided with a collision plate provided at a position opposed to the jet nozzle, the jet nozzle and the jet flow path are integrated, so that the generation of a shock wave due to the jet flow in the jet flow path is suppressed. Therefore, the acceleration of the jet jet is increased, and the crushing ability is improved.

Since the jet flow path is formed of a metal material and the surface is lined, the strength, corrosion resistance and wear resistance of the flow path through which the jet flow passes are improved, and the durability against the high-speed jet flow is improved. Is improved.

The jet nozzle is provided with an attachment, and the jet jet discharged from the jet nozzle is freely adjusted by the attachment, so that the collision energy of the jet jet with respect to the collision plate can be set as desired. The desired pulverized material can be easily manufactured.

Further, since the supply port provided in the jet flow path for supplying the material to be ground has an elliptical shape having a long axis substantially in the same direction as the flow direction of the jet flow, the area of the supply port should be widened. It is possible to supply the material to be crushed to the crushing chamber without clogging.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view showing a main part of a collision type supersonic jet crusher according to the present invention.

FIG. 2 is a perspective view showing an integral component of a jet nozzle and a jet jet flow channel mounted on the crusher of FIG.

FIG. 3 is a front view of the integrated component shown in FIG. 2;

FIG. 4 is a perspective view showing an example of a jet nozzle provided in the crusher.

FIG. 5 is a front view of the ejection nozzle shown in FIG.

FIG. 6 is a perspective view of an attachment engaged with the ejection nozzle shown in FIGS. 4 and 5;

FIG. 7 is a front view of the attachment shown in FIG. 6;

FIG. 8 is an explanatory diagram showing the ejection nozzle diameter of the ejection nozzle shown in FIG.

FIG. 9 is a perspective view showing an example of a jet flow path provided in the crusher.

FIG. 10 is a front view of the jet flow channel shown in FIG. 9;

FIG. 11 is a schematic explanatory view showing an example of a conventionally used supersonic jet crusher.

[Explanation of Symbols] 5 Jet jet flow path 5a Supply port 5b Passage 5c Exit 5d Inlet 6 Spout nozzle 6a Spout nozzle attachment section 6b Spout nozzle narrowing section 7 Collision plate 9 Crushing chamber Ta Pulverized object

Continuation of the front page (72) Inventor Hiroyuki Yoshikawa 1-3-6 Nakamagome, Ota-ku, Tokyo Inside Ricoh Co., Ltd. (56) References JP-A-61-171551 (JP, A) JP-A-56-61226 (JP, A) JP-A 1-148740 (JP, U) JP-A 58-178358 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B02C 19/06 B02C 19 / 00

Claims (3)

(57) [Claims] A collision type supersonic speed comprising a jet nozzle for jetting a jet jet into a pulverizing chamber, a jet jet flow path for supplying an object to be pulverized to the jet jet, and an impingement plate provided at a position facing the jet nozzle. In a jet crusher,
Ri Na integrated the the jet nozzle and the jet flow path,
For supplying the material to be crushed provided in the jet jet flow path.
The supply port extends along the major axis in the direction
A collision type supersonic jet crusher characterized by having an elliptical shape . 2. The collision type supersonic jet pulverizer according to claim 1, wherein the jet jet flow path is formed of a metal material, and the surface thereof is lined. 3. The jet nozzle is provided with an attachment, and the jet jet discharged from the jet nozzle is freely adjusted by the attachment.
Or a collision type supersonic jet crusher according to 2 above.