JPS6164327A - Three-roll lump molding machine - Google Patents

Abstract

PURPOSE:To obtain a powder or lump having high compressive strength, by applying dividing compression molding to a rod shaped block by one of secondary compression molding lump forming rolls, which are provided in opposed relation to one of primary compression molding lump forming rolls, to form an individual briquette. CONSTITUTION:Two primary compression molding lump forming rolls 13, 14 are arranged so that the axes thereof are mutually parallel and the peripheral surfaces 13a, 14a thereof are opposed to each other and the rotary directions thereof are made opposite as shown by arrows. Recessed peripheral grooves 13b, 14b are formed to the entire peripheral surfaces 13a, 14a of both rolls at the corresponding positions of the peripheral surfaces 13a, 14a of both of them and both rolls 13, 14 are rotated while a powder A is pushed in between the peripheral surfaces 13a, 14a and confined in the mutually corresponding recessed peripheral grooves 13b, 14b to be compressed therein. By this method, a rod shaped block A1 having a shape according to the cross-sectional area of the recessed peripheral grooves 13b, 14b is continuously molded and processed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in a roll agglomeration machine known as a molding machine for granulating and molding various powders into desired shapes.

(Prior art) Pharmaceuticals, food products, chemicals such as seasonings, food industry, ceramic industry such as bricks, tiles, gypsum, and cement, mining industry such as coal and ore, or steel manufacturing, M steel, and box refining. etc. 4J
In a wide range of industrial fields, including the raw material manufacturing industry, such as IU recycling and granulation of blast furnace raw materials, etc.
Needless to say, the means of granulating and molding various raw material powders into briquettes having a desired shape is a well-known technique, and the molding methods include transfer molding, extrusion molding, compression molding, and even crushing molding. It is also known that various molding machines are used for each child stage. The roll agglomeration machine to which the present invention is applied is one type of compression molding machine, and has the structure illustrated in FIGS. 7 and 8. That is, in FIG. 7, 1.2 is a pair of forming rolls for agglomeration, and both rolls 1.
．． 2 has the same diameter, same size, and same structure, and both have bearings on the machine frame 3! 1.4, the rolls 2 are arranged opposite to each other so as to be rotatable in opposite directions, and the bearing part 4 of one roll 2 is a movable bearing part,
The pressure cylinder 5 is capable of crimping the circumferential surface of the roll. On the circumferential surface of both rolls 1.2, groups of concave pockets 6.6 for trapping and compression molding the raw material powder are arranged at corresponding positions along the entire length thereof. When arranging the concave grooves 6, since the pockets 6 have a consumable structure that causes wear and deformation, they are not formed directly on the roll circumferential surface, but as shown in FIGS. In addition, groups of 7 segments formed in the shape of several tenths of the circumference are removably attached to the surface layer of the roll circumferential surface, and concave pockets 6 are formed in each segment 7 to enable partial replacement. At this time, as shown in Fig. 8 1~■, the image forming roll 1.2
If a concave pocket 6.6 of the same shape is formed on each peripheral surface of the segment 7 through the segment 7, the shape of the pocket will be different from that shown in FIG. In the case of the concave pocket t-6a shown in Figure H, a pillow type briquette 8a is obtained, and in the case of the concave pocket 6b shown in Figure H, a lens type briquette l-8b is obtained, and the concave shape shown in Figure H is obtained. In the case of the pocket 6c, a desired briquette shape is formed according to the shape of the concave pocket 6 so that an almond-type briquette 8c is obtained. At this time, if the concave pocket 6 is formed only on one side of the pair of forming rolls 1.2, and the region has a flat circumferential surface, as shown in an example in FIG. When the serrated concave pocket 6d is formed in the segment 7, if the pocket surface is a straight surface, a prism type briquette 8d is obtained, and if the pocket surface is a curved surface, a semicylindrical prism type briquette is obtained. 8e is obtained.

Above the pair of forming rolls 1.2, there is provided a powder guide 9 that closes the entrance space of both rolls 1.2, and inside the guide 9 there is a pre-pressurized feed of powder using, for example, a screw shaft. A device 10 is provided and a supply port 11 of the guide 9 is provided.
The raw material powder is continuously supplied from the pre-pressure feeding device I.
By feeding the powder preliminarily pressurized by O between the circumferential surfaces of both rolls 1.2, the 4';) body is formed as shown in FIG.
As shown in ~■, the briquettes are trapped in the pocket space, compressed and solidified, and granulated into the desired briquette shape, and these briquettes are discharged from the discharge chute 12 disposed below both rolls 1.2. Become.

(Problems to be Solved by the Invention) The 20-hole ingot making machine using the two forming rolls described above has the following problems due to its structure.

That is, the rolls are provided with segments with concave pockets on the surface layer of the circumferential surface, and the raw material powder pushed between the circumferential surfaces from above by the transfer of both rolls is compression-molded within the pockets, so that the powder only fills the volume of the concave pockets 6. cannot be compressed, so if the amount of powder pushed in is excessive, the powder will overflow between the circumferential surfaces.
Moreover, if it is insufficient, compression molding will be hindered, and it will be difficult to properly adjust the amount of push-in, which will impede smooth and stable operation. In addition, the concave pockets 6 must be processed individually, and the segments 7 must be machined for partial replacement.
Since the number of segments is as large as possible on the circumference, it takes a lot of effort and time to manufacture, process, and assemble the entire segment, and the cost of one set of segments is usually the cost of the loom itself. This makes it extremely expensive. In addition, during ingot making, it is necessary to accurately match the pocket positions of both rolls, and it is necessary to install a synchronization mechanism in the thrust direction and circumferential direction of the rolls, making the structure multi-i:1 and concave. Because there are 6 pockets,
The degree of sealing between the powder guide 9 and the roll surface is poor, and there is a possibility that the pushing pressure may partially escape.

Furthermore, in the case of two rolls, the compression rate is determined by the initially set distance between the centers of both rolls, and in order to increase the compression rate even further, compression is performed using two more rolls with the same distance between pockets. However, at this point, the front and rear agglomerates (the briquettes 8 shown in Fig. 8) would be different from each other, unless the powder produced by the roll gap was connected in a chain by a web formed by compression molding into a belt shape. This method is difficult to carry out because there is a risk that the pre-made lumps will not fit well into the pockets of the next roll and will be pulled out counterproductively, and also in cases where the same pressing force is not generated on the entire surface of the concave pocket 6. , there are problems such as the possibility that similar results will occur.

(Means for Solving the Problems) In order to solve the problems in the above-mentioned 20-hole agglomeration machine, the present invention eliminates the compression molding of powder using concave pockets, and provides a concave circle on at least one peripheral surface. two 1's forming b
The powder is compression-molded into a rod-shaped block by an agglomeration roll for secondary compression molding, and this rod-shaped block is formed by an agglomeration roll for secondary compression molding, which is placed opposite to one of the agglomeration rolls for primary compression molding. The briquettes are divided and compression molded into individual briquettes using one of the briquettes, and specifically, as a roll agglomeration machine, the briquettes are arranged so that their circumferential surfaces face each other so that they can freely rotate in opposite directions. (Two agglomeration rolls for primary compression molding for forming rod-shaped blocks each having a concave circumferential groove formed on one circumferential surface, and one of the agglomeration rolls for primary compression molding having a concave circumferential groove. An agglomeration roll for secondary compression molding, in which a lump roll and its circumferential surface are opposed to each other so as to be rotatable in opposite directions, and whose circumferential surface has an uneven toothed surface for dividing and compressing the rod-shaped block into individual briquettes. According to the technique i/object means of the present invention, as shown in FIGS. 4 and 5, two primary compression molding agglomeration rolls 13.
14, with their axes parallel to each other on their circumferential surfaces 13a, 14
a facing each other and with their rotating directions opposite as shown by the arrows, and forming concave circumferential grooves 13b and 14b extending over the entire circumferential surface at corresponding positions on the circumferential surfaces 13a and 14a of both. By rotating both rolls 13 and 14 and pushing the powder ^ between their circumferential surfaces 13a and 14a, the body ^ is rotated around four corresponding times. Fi13b, 14b
confine and compress the concave circle 1rlS13b, 14
A bar-shaped protrusion A1 having a shape according to the cross-sectional shape of b is continuously formed by molding.
Depending on the width of A, one or more rod-shaped blocks A can be formed as desired, such as the two shown in the example, and it is also possible to form a plurality of rod-shaped blocks A at the same time. Alternatively, the concave circumferential groove 13b or 14b may be formed only on one of the ingot rolls 13 or 14, and the other may have only the flat circumferential surface 14a or 13a forming the circumferential surface.
A rod-shaped block AI having a cross-sectional shape surrounded by the concave circle 13b or 14b and the circumferential surface 14a or a part of the circumferential surface of 13a can be similarly compression-molded. Furthermore, in the present invention, one of the agglomeration rolls for primary compression molding, the agglomeration roll 14 in the illustrated example, is arranged so that its axes are parallel to each other, with their circumferential surfaces 14a and L5a facing each other, and in the direction of the arrow. As shown, an agglomeration roll 15 for secondary compression molding with its rotation direction opposite is arranged, and on the circumferential surface 15a of the agglomeration roll 15,
A concave circle in the ingot roll 14? At a position corresponding to m14b, convex portions 15b having a tailored cross-sectional shape having a height that fits into the concave circumferential groove 14b are arranged in a row at regular intervals, and convex portions L5b,
By forming an uneven ridged surface 15d with troughs 15C between the rollers 15b, as the rolls 14.15 rotate, the grooves 14I of the circumferential surfaces 14a and 15a of both the rolls 14.15 and 15a are formed. A rod-shaped tube o sent between
As shown in Fig. 4.5, the briquette 1 is divided into two parts by the individual protrusions 15b, and is subjected to secondary compression molding by the protrusions 15b and the valleys 15C to form a concave circumferential groove. 14b, the convex part 15b1 and the valley part 15c,
The briquette is given a shape according to its cross-sectional shape and is sent out from the rolls 14 and 15. In FIG. 5, the "" part indicates the part where the rod-shaped block A1 formed by the concave circumferential grooves 13b and 14b is further compressed secondarily by the toothed surface 15a of the agglomeration roll 15. The three agglomeration rolls 13.14°1
5, unlike the compression molding effect of the conventional concave pocket 6, the primary compression molding agglomeration roll 13.14
The two-stage compression molding process and the individual briquette dividing action by the secondary compression molding agglomeration roll 15 and the primary compression molding agglomeration roll 14 can be achieved extremely efficiently, stably and reliably, and also have excellent crushing strength. J'5) A body or a lump can be obtained. Furthermore, since there are no concave pockets 6 in the segment configuration, the concave circumferential grooves 13b, t4b and the concave and convex undulating surface L5d in each roll 13.111.15 have no concave pockets 6.
It is extremely easy to manufacture, allows for a significant reduction in segment costs through extensive testing of machining techniques, and synchronization of roll rotation is also important (this eliminates this problem, simplifying the structure). The diameter ratio of the constituent rolls can be arbitrarily selected, and the circumferential speed of each roll can also be controlled arbitrarily, and the compression density and compression directionality of the powder can be adjusted or imparted by the difference in circumferential speed. The purpose of solving the problems in the 20-rule agglomeration code can be easily achieved.

(Example) A specific example of a 30-liter ingot making machine according to the technical means of the present invention will be described with reference to FIGS. 1 to 6.

Figure 1 shows the main parts of the entire agglomeration machine, and in this embodiment, the fourth
．． Concave circumferential grooves 13b are formed on both of the primary compression molding agglomeration rolls 13 and 14, which have the same protrusion as illustrated in FIG.

14b is shown, the two agglomeration rolls 13 and 14 are located on the machine frame 3, and their axes are located on the same center line X-χ, and the roll 13 is located above , the rolls 14 are arranged parallel to each other as lower peripheral surfaces 13a, 1
4a are disposed facing each other, and both rolls 13 and 14 are provided so as to be rotatable in opposite directions as shown in FIGS. 2 and 4.5. Circumferential surfaces 13a of both rolls 13 and 14
, 14a, as shown in the second figure, concave circumferential grooves 13b and 14b (in this embodiment, there are two grooves each) each having a substantially trapezoidal cross-sectional shape (this shape is arbitrary) are located at the pro-center position. It is formed. Both rolls 13, 14 each have a bearing 4.
・It is rotatably mounted on the shaft by 1, and -force ingot 11-
The bearing part 1 of the roll 1 is made flexible toward the bearing part 4 of the other agglomeration roll 13 by the pressurizing cylinder 5.
[ ], This is similar to the conventional roll agglomeration machine, and the opposing circumferential surfaces 13a, 14 of both D-rules 13.14;
In the population example, the fly body guide 9 is provided in a closed shape, and the kite 9 is provided with a screw shaft or the like. It is similar to the conventional roll agglomeration machine that the pressurized feed iX device 10 is installed and the powder supply port 11 is provided at the top. In the embodiment, the secondary compression molding agglomeration roll is located on the lower peripheral side of the primary compression molding agglomeration roll 14 and has its axis located on the center line Y orthogonal to the center line XX. 15 are arranged in parallel so that their circumferential surfaces 15a face the circumferential surface 14a of the agglomeration roll 14, and the agglomeration rolls 15 are mounted on an axis so as to be rotatable in opposite directions to the agglomeration rolls 14 by another bearing part 4. The peripheral surface 1 of this secondary compression molding agglomeration roll 15 is supported and provided on the machine frame 3.
As shown in FIGS. 2 and 4.5, at the position corresponding to the concave circumferential groove 14b of the agglomeration roll 14 at 5a, the cross section is approximately serrated (the cross-sectional shape is arbitrary), and Convex portions 15b having a height that fits into the four circumferential grooves 14b are arranged at regular intervals in the circumferential direction, and a valley portion 15c forming a substantially flat surface (the shape is arbitrary) is formed between the convex portions 15b and 15b. This forms a concavo-convex tooth-shaped surface 15d. each concave circumferential groove 13b in the primary compression molding agglomeration roll 13.14;
14b, when forming the uneven toothed surface 15d on the agglomeration roll 15 for secondary compression molding, these are all worn out,
Li which easily causes deformation and damage! Since it is an i-wear structure, as illustrated in FIG. 2, it is divided into a plurality of pieces and the roll peripheral surface 13 is
It is appropriate to form a segment 17 which is partially replaceably mounted on the surface layer of each of a, 14a and 15a.

FIGS. 6I to 6 show a combination example of the agglomeration rolls 13 and 14 for primary compression molding and a structural example of the powder kite 9 in the present invention, as shown in FIG. 61. , both peripheral surfaces 13a of the agglomeration rolls 13.14.

When forming the concave circumferential grooves 13b and 14b in the agglomeration roll 14a, in addition to the combination of the two-groove facing type in which both the concave circumferential grooves 13b and 14b face each other directly, as shown in FIG. The circumferential surface 14a of the other agglomeration roll 14 is directly opposed to the concave circumferential groove 13b, and the circumferential surface 13a of one agglomeration roll 13 is directly opposed to the concave circle 1t14b of the agglomeration roll 14. It is also possible to perform 1M tying with both grooves intersecting, and furthermore, as shown in FIG. A concave circumferential groove 14b is formed on the circumferential surface 14a of the ingot roll 14, and a concave circle Fj14b is formed.
Against the circumferential surface 13. ] is also possible. That is, the ingot roll 1 for primary compression molding of the present invention
3゜l11 is a concave circumferential groove 1 on at least one roll 14.
4I] to (I-) is the minimum requirement, combined with the ease of groove machining, grooved rolls or 1XI
Only 111 combinations of various types are possible, such as a combination of rolls with j and rolls without l+' /:l I 3 b and the circumferential surface 14a, or the concave circumferential groove 14b and the circumferential surface 13a can be freely selected. Also, this ingot roll 13.14
When feeding the powder between the rolls 1, 3 and 1 of the present invention, it is necessary to strictly block and close the opposite peripheral surface of the rolls 13, 14 by the lower end of the powder guide 9. 14 has only concave circumferential grooves 13b, 1-4b and four circumferential grooves t4b, and its simple structure allows the lower end of the powder guide 9 to be connected to the roll 13.14, as illustrated in FIGS. Both measuring walls facing the circumferential surface! lea, 9a and 13, l
It has a cylindrical housing shape with both end walls 9b, 9b facing the axial end surface of -1, and rolls 13.
4 circumferential surfaces 13a, 14a and 4 circumferences/l'513b, 1
The end wall 9b is formed with an end 18 that follows the uneven shape of the end wall 9b.
, 9b is formed with an end 19 at the lower end thereof, which closes the inlet gap between the two rolls 13 and 14, so that the inlet space of both the rolls 13 and 14 can be blocked and closed off from the outside world. This makes it easy to reliably prevent powder from being reported to outside parties.

According to the embodiment, in FIG. 1, the raw material powder is supplied from the supply port 11, and the powder is pre-loaded by the pre-pressure feeding device)0. In a pressurized state, the ingot roll 13 for primary forming
．． By force-feeding the powder A between the opposing circumferential surfaces 13a and 14a of the agglomeration rolls 13.14 and 14a, the powder A is transferred to the recesses I71li' formed on the circumferential surfaces L3a and 14a of the agglomeration rolls 13.14, as previously explained with reference to FIG. +'i I 311 , 1 II b
11. Compression molded with encapsulation. Te (;C
While continuously forming 1' as L1 Tsuku^l, 1
Facing between the opposing circumferential surfaces 14a and 15a of the agglomeration roll X4 for depressurization key molding and the agglomeration roll 15 for secondary pressure ♀1h molding, 14
°-Fall cock ^1 is the unevenness of the ingot roll 15, HB;
, , by the shaped surface 15d and the four circumferences 1111 and 14b, 'ζ
When the briquettes are subjected to secondary compression molding, as shown in FIG. will be done.

At this time, the shape of the briquette Az is, for example, a trapezoidal briquette 20, depending on the cross-sectional shape of the four circumferential grooves 14b and the cross-sectional shape of the convex portions 15b and valleys L5c on the uneven toothed surface 15d, as shown in FIG. It is possible to later form the briquettes into any desired shape, such as semicylindrical briquettes 21, 22, or triangular briquettes, and of course shapes other than those shown in the drawings are also possible. +iii 2 by recording lump rolls 14 and 15
During the next pressure H'6 forming process, the part divided by the hollow convex part 15b on the uneven toothed surface 15d is partially overcompressed compared to the central part formed by the trough part 15c, as shown in FIG. Even if a rib-shaped continuous part 23 is formed, it is easily damaged due to cracking, and does not prevent division.

(Effects of the Invention) According to the 30-l agglomeration means of the present invention, the raw material powder is formed in the concavities extending over the entire circumferential surface formed on either or both of the agglomeration rolls 13 and 14 for primary compression molding. I'74/11'113
b, 14b, or the concave circumferential groove 13b and the circumferential surface 14a, and the concave circumferential groove 14b and the circumferential surface 13a to form a bar-shaped block 1, and then this bar-shaped block A
1 is subjected to secondary compression molding and divided into individual briquettes (A2) between the agglomeration roll 14 and the concave-convex mountain-like surface 15d of the secondary compression molding roll 15, so that two-stage compression is performed. By molding, it is possible to reliably and easily obtain powder or lumps with high crushing strength, and it is possible to improve the compressibility.

In particular, in the present invention, unlike the segment structure type in the prior art in which concave pockets 6 are arranged in a row, the mold surface has a concave circumferential groove 13b.

14b and uneven mountain-like surface 15d, the segment structure can be significantly reduced, and a structure without segments can also be used. By significantly simplifying the segment processing man-hours, the ingot roll cost and the entire equipment can be reduced. Reduce the initial cost and running cost of 5.
It is possible. Furthermore, since the concave bogeno 1-6 is completely unnecessary, the conventional structure for maintaining a group of 2r-1-ru is also unnecessary. By making it possible to arbitrarily control the temperature and giving a circumferential speed difference, it is possible to improve the pressure Flii richness and provide m contraction directionality by 11J. That is, in order to improve moldability, the i-LL method 1. (For example, change the indentation pressure of the powder or 1. Forming row) Only a limited narrow selection can be made, such as increasing or decreasing the number of revolutions, but the 3 of the present invention
According to the 01 system, changing the gap between the primary compression molding rolls 1: I! I] Adjustment, roll circumferential speed light adjustment -9T
This allows for wider selection and control, and easier roll structure than before, under pressure and crushing. 1h rate is increased, and granulation or agglomeration with better formability is efficiently produced. As a granulation or agglomeration machine for raw material powder in various productions, including material 14 with a 1 minute (21 It is possible to go.

[Brief explanation of the drawing]

Fig. 1 is an overall front view of an embodiment of the agglomeration roll according to the present invention, Fig. 2 is a perspective view of the main part of the agglomeration roll, Fig. 3 is a perspective view of an example of the form of the formed briquette, and Fig. 11 is a perspective view of the agglomeration roll. JT by roll,
(iii) A longitudinal sectional front view of the processing and forming state, Fig. 5 is a cross-sectional plan view of the same, Fig. 61''l is an explanatory view of the same roll combination and powder kite embodiment, Fig. 7 is a conventional 20-l agglomeration machine. A front view of one example, and FIG. 8 is an explanatory view of each example of the same forming roll and companion product frikesot. 3-Machine frame, 4-Bearing portion, 9-Powder guide, 13° 14-
- Primary compression molding ingot roll, L3a, 14a - peripheral surface,
13b, 14b - one concave circle l: +l, 15 - ingot roll for secondary compression molding, L5a - peripheral surface, 15b - convex part, 15
cm valley, 15d-uneven toothed surface, Δ-powder 8, - rod-shaped pro, ri, 82--]
4 Σ

Claims (1)

[Claims] 1. An agglomeration machine for compression molding powder into briquettes of a desired shape, the circumferential surfaces of which are opposed to each other so as to be rotatable in opposite directions, and at least one of the circumferential surfaces has a concave circumferential groove. Two of the agglomeration rolls for primary compression molding for rod-shaped block forming having formed therein are opposed to the agglomeration roll having a concave circumferential groove among the agglomeration rolls for primary compression molding, and the peripheral surfaces thereof are opposite to each other. and one of agglomeration rolls for secondary compression molding which are arranged opposite each other so as to be rotatable in the direction and whose peripheral surface has an uneven toothed surface for dividing and compressing the rod-shaped block into individual briquettes. 3-roll ingot making machine.