CN104117409A - Vertical mill - Google Patents
Vertical mill Download PDFInfo
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- CN104117409A CN104117409A CN201410381233.0A CN201410381233A CN104117409A CN 104117409 A CN104117409 A CN 104117409A CN 201410381233 A CN201410381233 A CN 201410381233A CN 104117409 A CN104117409 A CN 104117409A
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- support
- bearing
- grinding roller
- separation block
- hinged
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- 238000000926 separation method Methods 0.000 claims abstract description 69
- 238000003801 milling Methods 0.000 claims abstract description 14
- 238000000227 grinding Methods 0.000 claims description 74
- 239000000463 material Substances 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 description 21
- 238000009434 installation Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 235000013312 flour Nutrition 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Crushing And Grinding (AREA)
Abstract
The embodiment of the invention discloses a vertical mill. Milling rollers in the vertical mill are arranged on separation seats through milling roller shafts, wherein one ends of the separation seats are detachably hinged on a bracket, and the other ends of the separation seats are fixed on the bracket. Compared with a manner of directly fixing the milling rollers on the bracket by using a plurality of large bolts or fixing the milling rollers on the bracket by using milling roller seats in the prior art, in the embodiment of the invention, the manner of fixing the milling rollers on the bracket by hinging one ends of the separation seats and fixing the other ends of the separation seats on the bracket through pin shafts or bolts is adopted, so that the fixing of the milling rollers is finished by adopting small fixing parts even if aiming at a large vertical mill, and thus, the difficulty of disassembling and assembling the milling rollers can be reduced.
Description
Technical field
The present invention relates to field of mechanical technique, more particularly, relate to vertical grinder.
Background technology
Vertical grinder is a kind of disintegrating apparatus that can be used in small, broken bits, ultrafine grinding and grinding, is widely used in the pulverizing of the various solid materials of the industries such as cement, building materials, mine, electric power, metallurgy, chemical industry.
Refer to the of the prior art a kind of vertical grinder shown in Fig. 1, this grinding machine comprise upper casing 1 ', lower casing 2 ', transmission main shaft 3 ', support 4 ' and grinding roller 7 ', wherein, transmission main shaft 3 ' be loaded on upper casing 1 ' top board, support 4 ' be arranged on transmission main shaft 3 ' one end, support 4 ' above have meets the installing hole of grinding roller 7 ' pass through, grinding roller seat 6 ' be arranged in this installing hole; Grinding roller 7 ' by its roll shaft and grinding roller seat 6 ' be connected or be directly fixed on grinding roller seat 6 ' on; Upper casing 1 ' be connected with lower casing 2, upper casing 1 ' top have charging aperture 11 ', upper casing 1 ' top or upper casing 1 ' sidewall setting can meet the access hole 10 of grinding roller seat 6 ' and grinding roller 7 ' pass through '; Lower casing 2 ' bottom have discharging opening 9 ', lower casing 2 ' internal face be provided with mill 8 ', this mill 8 ' annular flour milling be taper, grinding roller 7 ' roll surface and mill 8 ' flour milling between form clearance-type material milling surfaces.
In the vertical grinder of said structure, the fixing general employing shaft of grinding roller of grinding roller and coordinating of support or the direct cylinder of grinding roller seat or circular cone, slightly larger grinding machine adopts movably cover for seat also to fix with many screws, this is for some small-sized roller mills, its grinding roller and its axle are all less, therefore can also be for convenience detach, but for medium-and-large-sized roller mill, installation and removal are wasted time and energy, increase the too much mounting or dismounting time, with expended too much man power and material, and increase workman's labour intensity, and be there is no interchangeability for the shortcoming of this fixed form that adopts mobile cover for seat, this replacing to wearing and tearing or after damaging can cause puzzlement, in addition, the reliability of these mounting means is not high, because heaviness too likely causes Rig up error, this will easily damage shaft of grinding roller and corresponding support, can cause like this time of more repairings and left alone without help work and more expense occurs.
Therefore, how to reduce the difficulty of grinding roller installation and removal, become those skilled in the art's technical problem urgently to be resolved hurrily.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of vertical grinder, reduce to realize that the labour intensity of grinding roller installation and removal is large, the time is long and expense is high and improve the objects such as interchangeability.
For achieving the above object, the invention provides following technical scheme:
A kind of vertical grinder, comprises casing, support, grinding roller and mill, and wherein, described mill is arranged on the inwall of described casing, has and meet the breach that described grinding roller passes through on described support, forms institute's clearance-type material milling surfaces between described grinding roller and described mill; Also comprise separation block, described grinding roller is arranged on described separation block by shaft of grinding roller, and described separation block one end is detachably hinged on described support, and the other end adopts bearing pin or is bolted on described support.
Preferably, in above-mentioned vertical grinder, the periphery that is positioned at described breach on described support is provided with to the bearing ear of the axial or oblique extension of described support, and described separation block one end is detachably hinged on described bearing ear, and the other end is fixed or is hinged on by bearing pin on described bearing ear.
Preferably, in above-mentioned vertical grinder, described bearing ear is two pairs, and is arranged symmetrically in the side of described breach.
Preferably, in above-mentioned vertical grinder, described bearing ear is at least one.
Preferably, in above-mentioned vertical grinder, the corresponding position of the hinged one end of described separation block and described bearing ear is provided with the first through hole, and described separation block is provided with the second through hole with the corresponding position of the described bearing ear other end, and described the first through hole and described the second through hole are once through bearing pin.
Preferably, in above-mentioned vertical grinder, described bearing ear is at least two, and the first through hole of separation block and each bearing ear and the position of the second through hole arrange separately bearing pin, respectively with single bearing pin through the through hole on single bearing ear and corresponding separation block.
Preferably, in above-mentioned vertical grinder, one end that penetrates described the first through hole and the second through hole of described bearing pin is provided with nut or screw.
Preferably, in above-mentioned vertical grinder, the periphery that is positioned at described breach on described support is provided with to the bearing ear of the axial or oblique extension of described support, and described separation block one end is detachably hinged on described bearing ear, and the other end is bolted on described support.
Preferably, in above-mentioned vertical grinder, also comprise transmission main shaft, described transmission main shaft is arranged on described upper casing or described lower casing or described upper and lower casing, and described support is fixed on transmission main shaft and is positioned at the cavity of described casing.
A kind of vertical grinder, comprise drive unit, mill, casing, support, grinding roller, bearing and oil cylinder, described drive unit is connected with described mill, described bearing is fixed on the outside of described casing, on described support, have and meet the breach that described shaft of grinding roller passes through, described mid-stent end is hinged on described bearing, also comprise separation block, described grinding roller is arranged on described separation block by shaft of grinding roller, described separation block is hinged on described support by dismountable bearing pin, one end that described support does not arrange separation block is hinged on one end of oil cylinder, the other end of described oil cylinder is on the ground hinged.
Preferably, in above-mentioned vertical grinder, the periphery that is positioned at described breach on described support is provided with to the bearing ear of the axial or oblique extension of described support, and the dismountable bearing pin in described separation block one end is hinged on described bearing ear, and the other end is fixed on described bearing ear by bearing pin.
Preferably, in above-mentioned vertical grinder, on the sidewall of described upper casing, be provided with access hole, described grinding roller etc. can pass described access hole.
From technique scheme, can find out, grinding roller described in vertical grinder in the embodiment of the present invention is arranged on described separation block by shaft of grinding roller, described separation block one end is detachably hinged on described support, and the other end adopts bearing pin or is bolted on described support.With the multiple king-bolts of employing of the prior art, grinding roller is directly fixed on support or is fixed on compared with the fixed form on support by shaft of grinding roller, owing to adopting hinged one end, separation block one end in the embodiment of the present invention by bearing pin or being bolted on support, even for large-scale vertical grinder, all can adopt less fixture to complete the fixing of grinding roller, and heavy grinding roller needn't or be dismantled on grinding machine in mill, therefore the dismounting of grinding roller and the time of installation and difficulty all have reduction.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The structural representation of a kind of vertical grinder that Fig. 1 provides for prior art;
The structural representation of a kind of vertical grinder that Fig. 2 provides for the embodiment of the present invention;
The structural representation of the second vertical grinder that Fig. 3 provides for the embodiment of the present invention;
The partial structurtes schematic diagram of the third vertical grinder that Fig. 4 provides for the embodiment of the present invention;
The structural representation of the 4th kind of vertical grinder that Fig. 5 provides for the embodiment of the present invention;
The partial structurtes schematic diagram of the 5th kind of vertical grinder that Fig. 6 provides for the embodiment of the present invention;
The partial schematic diagram of a kind of mounting structure of the separation block of the grinding roller that Fig. 7 provides for the embodiment of the present invention;
Fig. 8 is separation block and the installation of bearing ear and the partial schematic diagram of structure in Fig. 7;
The partial schematic diagram of the similar alternative arrangements of the separation block of the grinding roller that Fig. 9 provides for the embodiment of the present invention;
Figure 10 is separation block and the installation of bearing ear and the partial schematic diagram of structure in Fig. 9;
The partial schematic diagram of the third mounting structure of the separation block of the grinding roller that Figure 11 provides for the embodiment of the present invention;
Figure 12 is separation block and the installation of bearing ear and the partial schematic diagram of structure in Figure 11.
In Fig. 1 to Figure 12:
1 ' be upper casing, 2 ' be lower casing, 3 ' be transmission main shaft, 4 ' be support, 5 ' be drive unit, 6 ' be grinding roller seat, 7 ' be grinding roller, 8 ' be mill, 9 ' be feed opening, 10 ' be access hole, 11 ' for charging aperture;
1 is that upper casing, 2 is that lower casing, 3 is that transmission main shaft, 4 is that support, 5 is that mill, 6 is that separation block, 7 is that grinding roller, 8 is that roll shaft, 10 is that access hole, 11 is that bearing pin, 12 is that nut, 13 is that bearing pin, 14 is that nut, 15 is that bolt, 16 is that screw, 17 is that bearing ear, 18 is that oil cylinder, 19 is that bearing, 20 is that screw, 21 is that pressing plate, 22 is that drive unit, 23 is material inlet.
Detailed description of the invention
For this reason, core of the present invention is open a kind of vertical grinder, to realize the object that reduces grinding roller installation and removal difficulty.Below, with reference to accompanying drawing, embodiment is described.In addition the summary of the invention that the embodiment shown in, does not record claim plays any restriction effect.The solution of the invention that in addition,, the full content of the represented formation of embodiment is not limited to record as claim is necessary.
As shown in figure Fig. 2, Fig. 3, Fig. 4 and Fig. 5, this vertical grinder comprises casing, support 4, grinding roller 7 and mill 5, and wherein, mill 5 is arranged on the inwall of casing, on support 4, have and meet the breach that grinding roller 7 passes through, between grinding roller 7 and mill 5, form clearance-type material milling surfaces; Also comprise separation block 6, grinding roller 7 is arranged on separation block 6 by roll shaft 8 and through breach, the separation block 6 dismountable bearing pins in one end are hinged on support 4, and the other end is by bearing pin or be bolted on support 4.
It should be noted that, the casing in the present invention comprises upper casing 1 and lower casing 2, and upper casing 1 is dismountable to be arranged on lower casing 2.Wherein, drive support to rotate by transmission main shaft, this transmission main shaft can be arranged on upper casing 2, or on lower casing 2, the two ends of transmission main shaft 3 can also be arranged among upper casing 1 and lower casing 2, and material inlet 23 is arranged on upper casing 1.
In Fig. 2 and Fig. 4, transmission main shaft 3 is arranged on upper casing 1, and the transmission main shaft 3 in Fig. 3 and Fig. 5 is arranged on lower casing 2.Transmission main shaft 3 in the embodiment of the present invention can do axial movement compared with transmission main shaft of the prior art.
In vertical grinder in the embodiment of the present invention, grinding roller 7 is arranged on separation block 6 and through breach by roll shaft 8, and separation block 6 one end are detachably hinged on support 4, and the other end is fixed on support 4.With the cylinder of employing shaft of grinding roller of the prior art one end or circular cone, grinding roller 7 is directly fixed on support 4 or by many bolts, grinding roller seat is fixed on compared with the fixed form on support 4, owing to adopting separation block 6 hinged one end, one end to be fixed on support 4 by bearing pin 11 or bolt 15 in the embodiment of the present invention, even for large-scale vertical grinder, all can adopt the easier and less fixture of this dismounting to complete the fixing of grinding roller 7, therefore the dismounting of grinding roller 7 from machine and the difficulty of installation all have reduction.
In embodiments of the present invention, separation block 6 with the fixed form of grinding roller 7 is, joins with it and is incorporated in end and nut 14 or screw 16 or pressing plate 21 are set are fixed at the cylinder of roll shaft 8 one end of grinding roller 7 or circular cone.
In an embodiment of the present invention, as shown in Fig. 7 to Figure 12, the periphery that is positioned at breach on support 4 is provided with to the bearing ear 17 of the axial or oblique extension of support 4, separation block 6 one end are detachably hinged on bearing ear 17 by bearing pin 13, and the other end is fixed on bearing ear 17 by bearing pin 11 or bolt 15.
Above-mentioned bearing ear 17 is one or two, and in the time being one, bearing ear 17 is distributed in a side of breach, or this bearing ear 17 all surrounds the edge of breach, forms U-shaped structure; In the time being two, be arranged symmetrically in the both sides of breach.
Wherein, realizing hinged form has, and the hinged one end of separation block 6 and bearing ear 17 is provided with a through hole, and the position of bearing ear 17 correspondences is provided with a hole, and two holes are once through bearing pin 13.
In order to ensure the stability in this equipment use procedure, one end that penetrates two holes of bearing pin 13 is provided with nut 12.
Wherein, this bearing pin 13 provides a fixing point for this separation block 6, and for better fixing, this separation block 6 also provides other metastable fixing point by other bearing pins or bolt 15 are set for this separation block 6.In separation block 6 shown in Fig. 7 and Fig. 9, by bearing pin 11, this separation block 6 is fixed on bearing ear 17, thereby for this separation block 6 provides two fixing points, these two fixing points are that bearing pin 13 and bearing pin 11 have been realized the fixing of separation block 6 and support 4.In Figure 10 and Figure 11, adopt 2 shorter bearing pins 13 to locate with bearing ear 17, then adopted a longer bearing pin 11 hinged with bearing ear 17.Its bearing pin 11 also can change two shorter bearing pins into and carry out hinged, adopt 4 shorter bearing pins to be fixed and to locate, also can only adopt single bearing pin 11 and bearing pin 13, while adopting single bearing pin 11 and bearing pin 13, its bearing pin can be long, also can be shorter, with simplified structure, Fig. 8 be the local schematic top plan view of Fig. 7.
Wherein, separation block shown in separation block shown in Fig. 9 to Figure 12 and Fig. 7 and Fig. 8 and difference are, on separation block shown in Fig. 9 to Figure 12, there is the loading end of inclination, arranging of tilting can make the requirement of support 4 lower, for example, the position that support arranges breach ensures that without incline structure is set roll shaft tilts along specific angle.
In another embodiment of the present invention, as shown in FIG. 11 and 12, the periphery that is positioned at breach on support 4 is provided with the axially extended bearing ear 17 to support 4, and separation block 6 one end are detachably hinged on bearing ear 17 by bearing pin 13, and the other end is fixed on support 4 by bolt 15.Wherein, hinged fixed form can be with reference to above-described embodiment; In fixed form by bolt 15, in the position of separation block 6 and support 4 correspondences, through hole is set, by the bolt 15 through this through hole, completes the fixing of separation block 6.
In another embodiment of the present invention, as shown in Figure 6, vertical grinder comprises drive unit 22, mill 5, upper casing 1, lower casing 2, support 4, grinding roller 7, bearing 19 and oil cylinder 18, drive unit 22 is connected with mill 5, bearing 19 is fixed on upper casing 1 outside, on support 4, have a breach, support 4 middle ends are hinged on bearing 19; Also comprise separation block 6, grinding roller 7 is arranged on separation block 6 by roll shaft 8, and separation block 6 one end are hinged on support 4 by dismountable bearing pin, and the other end is fixed on support 4, one end that support 4 does not arrange separation block is hinged on one end of oil cylinder 18, and the other end of oil cylinder 18 is on the ground hinged.
Also comprise transmission main shaft 3, transmission main shaft 3 is arranged on upper casing 1 or lower casing 2, and support 4 is fixed on transmission main shaft 3 and is positioned at the cavity that upper casing 1 and lower casing 2 surround.In vertical grinder as shown in Figure 2, transmission main shaft 3 is arranged on upper casing 1, and in vertical grinder as shown in Figure 3, transmission main shaft 3 is arranged on lower casing 2.In these two technical schemes, grinding roller 7 not only can also revolve round the sun under the effect of transmission main shaft 3 in rotation.
In another embodiment of the present invention, as shown in Figure 6, comprise drive unit 22, bearing 19 and oil cylinder 18, drive unit 22 fixes with mill 5, bearing 19 is fixed on upper casing 1 outside, support 4 middle ends are hinged on bearing 19, and one end that support 4 does not arrange separation block 6 is hinged on the one end in stiff end or the telescopic end of oil cylinder 18, and the other end of oil cylinder 18 is on the ground hinged.In embodiments of the present invention, this mill 5 can rotate under the effect of drive unit 22, and 7 corresponding of grinding rollers carry out from then do not revolve round the sun.On support 4, be positioned at the axially extended bearing ear 17 of the oriented support 4 of peripheral device of breach, separation block 6 is by bearing pin 11 and the detachably hinged bearing ear 17 on support 4 of bearing pin 13.The Main Differences of the present embodiment and previous embodiment is the mill rotation of the present embodiment, and grinding roller only can rotation.
Wherein, in above-mentioned vertical grinder, in order to be convenient for changing and to safeguard grinding roller 7, be provided with access hole 10 on the sidewall of upper casing 1, grinding roller can pass access hole 10.
The structure of the Vertical Mill of Fig. 1 can be implemented technical scheme of the present invention equally.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiment, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (9)
1. a vertical grinder, comprises casing, support, grinding roller and mill, and wherein, described mill is arranged on the inwall of described casing, has and meet the breach that described grinding roller passes through on described support, between described grinding roller and described mill, forms clearance-type material milling surfaces; It is characterized in that, also comprise separation block, described grinding roller is arranged on described separation block by shaft of grinding roller, and described separation block one end is hinged on described support by dismountable bearing pin, and the other end is fixed on described support.
2. vertical grinder as claimed in claim 1, it is characterized in that, the periphery that is positioned at described breach on described support is provided with to the bearing ear of the axial or oblique extension of described support, the dismountable bearing pin in described separation block one end is hinged on described bearing ear, and the other end is fixed on described bearing ear by bearing pin.
3. vertical grinder as claimed in claim 2, is characterized in that, described bearing ear is one or more, and is arranged in the side of described breach.
4. vertical grinder as claimed in claim 3, it is characterized in that, the corresponding position of the hinged one end of described separation block and described bearing ear is provided with the first through hole, described separation block is provided with the second through hole with the corresponding position of the described bearing ear other end, and described the first through hole and described the second through hole are once through bearing pin.
5. vertical grinder as claimed in claim 4, is characterized in that, one end that penetrates described the first through hole and the second through hole of described bearing pin is provided with nut.
6. vertical grinder as claimed in claim 1, it is characterized in that, the periphery that is positioned at described breach on described support is provided with to the bearing ear of the axial or oblique extension of described support, described separation block one end is detachably hinged on described bearing ear, and the other end is bolted on described support.
7. a vertical grinder, comprise drive unit, mill, casing, support, grinding roller, bearing and oil cylinder, described drive unit is connected with described mill, described bearing is fixed on the outside of described casing, on described support, have and meet the breach that described shaft of grinding roller passes through, described mid-stent end is hinged on described bearing, it is characterized in that, also comprise separation block, described grinding roller is arranged on described separation block by shaft of grinding roller, described separation block is hinged on described support by dismountable bearing pin, one end that described support does not arrange separation block is hinged on one end of oil cylinder, the other end of described oil cylinder is on the ground hinged.
8. vertical grinder as claimed in claim 7, it is characterized in that, the periphery that is positioned at described breach on described support is provided with to the bearing ear of the axial or oblique extension of described support, the dismountable bearing pin in described separation block one end is hinged on described bearing ear, and the other end is fixed on described bearing ear by bearing pin.
9. want the vertical grinder as described in 8 as right, it is characterized in that, on the sidewall of described casing, be provided with access hole, described grinding roller can pass described access hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410381233.0A CN104117409B (en) | 2014-08-05 | 2014-08-05 | Vertical grinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410381233.0A CN104117409B (en) | 2014-08-05 | 2014-08-05 | Vertical grinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104117409A true CN104117409A (en) | 2014-10-29 |
| CN104117409B CN104117409B (en) | 2018-11-27 |
Family
ID=51763176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410381233.0A Active CN104117409B (en) | 2014-08-05 | 2014-08-05 | Vertical grinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104117409B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2194214Y (en) * | 1994-01-19 | 1995-04-12 | 郝志刚 | roller mill |
| CN1792460A (en) * | 2005-12-30 | 2006-06-28 | 郝天成 | Vertical mill |
| CN200963595Y (en) * | 2006-10-31 | 2007-10-24 | 夏纪勇 | Roller mill |
| KR20110119908A (en) * | 2010-04-28 | 2011-11-03 | 김재훈 | Metal Chip Crusher |
| JP2013078707A (en) * | 2011-10-03 | 2013-05-02 | Mitsutaka Tamura | Roll mill |
| CN103537344A (en) * | 2013-11-05 | 2014-01-29 | 长沙深湘通用机器有限公司 | Roll mill |
-
2014
- 2014-08-05 CN CN201410381233.0A patent/CN104117409B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2194214Y (en) * | 1994-01-19 | 1995-04-12 | 郝志刚 | roller mill |
| CN1792460A (en) * | 2005-12-30 | 2006-06-28 | 郝天成 | Vertical mill |
| CN200963595Y (en) * | 2006-10-31 | 2007-10-24 | 夏纪勇 | Roller mill |
| KR20110119908A (en) * | 2010-04-28 | 2011-11-03 | 김재훈 | Metal Chip Crusher |
| JP2013078707A (en) * | 2011-10-03 | 2013-05-02 | Mitsutaka Tamura | Roll mill |
| CN103537344A (en) * | 2013-11-05 | 2014-01-29 | 长沙深湘通用机器有限公司 | Roll mill |
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| Publication number | Publication date |
|---|---|
| CN104117409B (en) | 2018-11-27 |
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