CN108453863A - A kind of refractory brick production vibrating forming machine - Google Patents
A kind of refractory brick production vibrating forming machine Download PDFInfo
- Publication number
- CN108453863A CN108453863A CN201810441387.2A CN201810441387A CN108453863A CN 108453863 A CN108453863 A CN 108453863A CN 201810441387 A CN201810441387 A CN 201810441387A CN 108453863 A CN108453863 A CN 108453863A
- Authority
- CN
- China
- Prior art keywords
- oil cylinder
- crane
- pressure head
- refractory brick
- crossbeam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
- B28B1/081—Vibration-absorbing means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
- B28B1/087—Producing shaped prefabricated articles from the material by vibrating or jolting by means acting on the mould ; Fixation thereof to the mould
- B28B1/0873—Producing shaped prefabricated articles from the material by vibrating or jolting by means acting on the mould ; Fixation thereof to the mould the mould being placed on vibrating or jolting supports, e.g. moulding tables
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/02—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
- B28B3/022—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form combined with vibrating or jolting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/02—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
- B28B3/04—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form with one ram per mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
- B28B1/087—Producing shaped prefabricated articles from the material by vibrating or jolting by means acting on the mould ; Fixation thereof to the mould
- B28B1/0873—Producing shaped prefabricated articles from the material by vibrating or jolting by means acting on the mould ; Fixation thereof to the mould the mould being placed on vibrating or jolting supports, e.g. moulding tables
- B28B2001/0876—Supports, e.g. tables, therefor
Abstract
The invention discloses a kind of refractory brick production vibrating forming machines,Including pedestal,Column,Crossbeam,Oil cylinder one and oil cylinder two,Base upper surface corner location is vertically-mounted column,The upper end of column is installed with crossbeam,The lower surface center of crossbeam is installed with oil cylinder one,The movable end of oil cylinder one is downward and end set has crane,The overcentre position of crane is installed with connecting plate,The upper surface of connecting plate is connected with the movable end of oil cylinder one,Pressure head is installed in the middle part lower position of crane,The configuration of the present invention is simple,It is easy to operate,Steel ball can be set between pressure head and crane,So that pressure head generates Liquid sloshing in crane,So as in forming process,The high-frequency vibration that bobbing machine generates can be cancelled,Vibration force is prevented to be transmitted on column,Be conducive to the extension of life of equipment,System under being arranged around equipment,Can blanking quickly be completed into molding adobe,Improve the efficiency of work.
Description
Technical field
The invention belongs to refractory brick production equipment technologies, and in particular to a kind of refractory brick production vibrating forming machine.
Background technology
Refractory brick abbreviation firebrick, the refractory material being fired into refractory clay or other refractory raw materials are faint yellow or with brown
Color, is mainly used for building smelting furnace, is resistant to 1580 DEG C -1770 DEG C of high temperature, and the refractory material with definite shape and size is pressed
Process of preparing come divide can be divided into be fired into bricks, unburned brick, fused cast refractories（Molten-cast brick）, refratory insulating brick；By shape and size
Standard size brick, common brick, specific bricks etc. can be divided into.The moulding process of refractory brick mainly has slip casting method, stiff-mud process, vibrating forming
Method and isostatic pressing method, vibration force, bonding agent type and quantity, grain mixture ratio, moisture wherein in vibration moulding method contain
Amount and pressure size, performance and quality to refractory product have an impact, its principle is the pug vibration force very high in frequency
Under the action of, it will be generated between each particle of pug and move and first collide, dynamic friction is instead of static friction so that each particle in pug
Interior friction is minimized, and is conducive to the flowing of particle, with the characteristic similar to fluid, thus is conducive to by closely knit and de-
Gas.
Vibrating forming machine used in existing refractory brick production is due to structure design, often so that vibrational energy
Amount passes to rack and column, and prolonged vibration can cause equipment certain damage, shorten the service life of equipment, separately
Outside, it needs first to dismantle mold, it is difficult to carry when exporting the adobe material of compaction moulding due to the deficiency of mold design
The efficiency of height work.
Invention content
In order to solve the above-mentioned technical problem the present invention, provides a kind of refractory brick production vibrating forming machine, design structure
Simply, scientific and reasonable, it is easy to use；Steel ball can be set between pressure head and crane so that pressure head generates in crane
Liquid sloshing, so that in forming process, the high-frequency vibration that bobbing machine generates can be cancelled, and vibration force is prevented to be transmitted to column
On, be conducive to the extension of life of equipment, system under being arranged around equipment, under can quickly completing molding adobe
Material, improves the efficiency of work.
The technical solution adopted in the present invention is：A kind of refractory brick production vibrating forming machine, including pedestal, column, cross
Beam, oil cylinder one and oil cylinder two, base upper surface corner location is vertically-mounted to have column, the upper end of column to be installed with crossbeam,
The lower surface center of crossbeam is installed with oil cylinder one, and the movable end of oil cylinder one is downward and end set has lifting
The overcentre position of frame, crane is installed with connecting plate, and the upper surface of connecting plate is connected with the movable end of oil cylinder one,
Pressure head is installed in the middle part lower position of crane, there are gap between pressure head and connecting plate, multiple steel are installed in gap
Ball, pressure head are clearance fit with crane, and crane is slidably located on four columns, and screw thread is pacified on the vertical direction of crossbeam
Equipped with a screw rod, limit switches are installed in the lower end of screw rod, by limit switch realize to the limit height position of crane into
Row limits；Pedestal is inner concave shape structure, and the center that inner fovea part is is equipped with fixed seat, the upper surface of fixed seat offer around
Equally distributed at least four blind hole in fixed seat center is provided with spring in blind hole, and the lower end of spring is fixedly connected on blind hole bottom
On face, the upper end of spring is installed with a locating ring, and the upper surface of locating ring is fixedly connected with platform, in the upper surface of platform
Heart position is equipped with moulding box, is provided with and can lift and be provided with below bottom plate in the lifting bottom plate that vertical direction slides in moulding box
Oil cylinder two, oil cylinder two are fixedly mounted on the lower surface position of platform, and the movable end of oil cylinder two is connected with lifting bottom plate, in platform
Lower surface be fixedly mounted there are two bobbing machine, automatic blanking device is installed in the lateral location of pedestal.
The automatic blanking device includes the mounting bracket for being fixedly mounted on base side, and mounting bracket upper surface, which is fixed, to be connected
It is connected to pusher cylinder, the flexible shaft end of pusher cylinder is equipped with scraping wings, and scraping wings can be under the action of pusher cylinder in mould
Case top position carries out transverse shifting, is located on the corresponding position of pusher cylinder in base upper surface and is equipped with blanking plate, blanking
The upper surface of plate is obliquely installed with level ground, and blanking plate tilts one end and the moulding box upper surface flush of high point.
Angle between the blanking plate and level ground is 15 °.
Two oil pipes are connected on the oil cylinder two, two oil pipes extend to chassis outer side position and the end of two oil pipes
It is respectively connected with pipe fitting.
The oil cylinder one is respectively connected with hydraulic station with oil cylinder two, is provided with to receive the control of limit switch on hydraulic station
Coremaking piece, when crane rises to the position contacted with limit switch, signal is passed to control chip by limit switch, control
The hydraulic station that chip controls are connected with oil cylinder one is stopped.
The spring is air spring.
The use process of this refractory brick production vibrating forming machine is：Mixture is poured into moulding box, starts oil cylinder one,
Oil cylinder one drives crane to move downward, and using pressure head by mixture compaction moulding, during compaction moulding, bobbing machine will
Vibration force passes to the moulding box on platform, and the mixture in moulding box can flow to each angle of moulding box under the action of vibration force
It falls, is conducive to the compactness for improving mixture, since pressure head pressing is above moulding box, vibration force is passed to pressure head by moulding box, pressure
Head Self generating oscillations due to being clearance fit between pressure head and crane, and are arranged between pressure head and the connecting plate of top
There is steel ball, pressure head itself can be made to generate small size vibrations during the work time, makes oil cylinder because pressure head vibrates to reduce
One, crossbeam and column generate the amplitude of vibration, are conducive to the stability for improving equipment；
It is compacted after the completion of work, oil cylinder one drives crane to move upwards, and stops when crane upper surface touches limit switch
It only works, in addition, the height of limit switch can be adjusted using screw rod, to be set to the rising limiting altitude of crane
It sets, the consumption of power can be efficiently reduced, save electric energy；
After crane rises, start oil cylinder two, oil cylinder two can drive lifting bottom plate to move upwards, thus by compaction moulding
Blank is exported out of moulding box, and after blank is exported completely, pusher cylinder pushes scraping wings that blank is pushed to blanking plate surface,
To complete the work of blanking.
There are gap between the pressure head and connecting plate, multiple steel balls are installed in gap, pressure head is gap with crane
Cooperation；The purpose being arranged in this way is：To offset vibration of the moulding box to pressure head by the gap between pressure head and crane, keep away
Exempt from pressure head and vibration force is passed into crane, the effective probability for reducing equipment damage, setting steel ball is for the work for pressure head
The dynamic frictional force reduced between connecting plate, and, to the active force that pressure head is downward, can also be improved under the action of oil cylinder one
Intensity.
The screw thread on the vertical direction of crossbeam is equipped with a screw rod, and the lower end of screw rod is installed limit switches, passed through
Limit switch realization is defined the limit height position of crane；The purpose being arranged in this way is：It is limited by limit switch
The height of crane can reduce the time of the work of oil cylinder one, advantageously reduce the consumption of power as far as possible.
The pedestal is inner concave shape structure, and the center that inner fovea part is is equipped with fixed seat, and the upper surface of fixed seat is opened
Equipped with being provided with spring in the equally distributed multiple blind holes in fixed seat center, blind hole；The purpose being arranged in this way is：It can make to put down
Platform and moulding box during the work time, high-frequency vibration are generated under the action of bobbing machine, multiple blind holes are arranged and in each blind hole
Upper installation spring is to increase the stability of working platform.
The upper end of the spring is installed with a locating ring, and the upper surface of locating ring is fixedly connected with platform；It sets in this way
The purpose set is：It avoids spring from being directly connected with platform, forms transition using locating ring, be more advantageous to the installation of platform.
The upper surface center of the platform is equipped with moulding box, and the lifting that can be slided in vertical direction is provided in moulding box
Bottom plate lifts and is provided with oil cylinder two below bottom plate, and oil cylinder two is fixedly mounted on the lower surface position of platform, the activity of oil cylinder two
End is connected with lifting bottom plate；The purpose being arranged in this way is：It can will be produced using oil cylinder two after mixture is compacted molding
Product are held up, and are facilitated blanking, are conducive to the raising of working efficiency.
Beneficial effects of the present invention are：It is the configuration of the present invention is simple, easy to operate, it can be arranged between pressure head and crane
Steel ball so that pressure head generates Liquid sloshing in crane, so that in forming process, the high-frequency vibration that bobbing machine generates can
It is cancelled, vibration force is prevented to be transmitted on column, be conducive to the extension of life of equipment, system under being arranged around equipment,
Can blanking quickly be completed into molding adobe, improve the efficiency of work.
Description of the drawings
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the installation diagram of the pressure head of the present invention.
It is marked in figure：1, pedestal；2, oil pipe；3, bobbing machine；4, spring；5, bottom plate is lifted；6, blanking plate；7, moulding box；8、
Column；9, oil cylinder one；10, crossbeam；11, screw rod；12, limit switch；13, crane；14, pressure head；15, scraping wings；16, pusher
Cylinder；17, platform；18, mounting bracket；19, locating ring；20, fixed seat；21, oil cylinder two；22, steel ball；23, connecting plate.
Specific implementation mode
The specific implementation mode of the present invention is described in further detail below in conjunction with attached drawing.
As shown, a kind of refractory brick production vibrating forming machine, including pedestal 1, column 8, crossbeam 10, one 9 and of oil cylinder
Oil cylinder 2 21,1 upper surface corner location of pedestal is vertically-mounted to have column 8, the upper end of column 8 to be installed with crossbeam 10, crossbeam
10 lower surface center is installed with oil cylinder 1, and the movable end of oil cylinder 1 is downward and end set has crane
13, the overcentre position of crane 13 is installed with connecting plate 23, the movable end of the upper surface and oil cylinder 1 of connecting plate 23
It is connected, pressure head 14 is installed in the middle part lower position of crane 13, there are gap, gaps between pressure head 14 and connecting plate 23
Multiple steel balls 22 are inside installed with, pressure head 14 is clearance fit with crane 13, and crane 13 is slidably located on four columns 8,
Screw thread is equipped with a screw rod 11 on the vertical direction of crossbeam 10, and the lower end of screw rod 11 installs limit switches 12, passes through limit
The realization of switch 12 is defined the limit height position of crane 13；Pedestal 1 is inner concave shape structure, the centre bit that inner fovea part is
It sets and fixed seat 20 is installed, the upper surface of fixed seat 20 is offered around equally distributed six blind holes in 20 center of fixed seat, blind hole
It is inside provided with spring 4, the lower end of spring 4 is fixedly connected on blind hole bottom surface, and the upper end of spring 4 is installed with a locating ring
19, the upper surface of locating ring 19 is fixedly connected with platform 17, and the upper surface center of platform 17 is equipped with moulding box 7, in moulding box 7
Being provided with can be in the lifting bottom plate 5 that vertical direction slides, and the lower section of lifting bottom plate 5 is provided with oil cylinder 2 21, and oil cylinder 2 21 is fixed
Mounted on the lower surface position of platform 17, the movable end of oil cylinder 2 21 is connected with lifting bottom plate 5, solid in the lower surface of platform 17
There are two bobbing machines 3 for Dingan County's dress, and automatic blanking device is equipped in the lateral location of pedestal 1.
The automatic blanking device includes the mounting bracket 18 for being fixedly mounted on 1 side of pedestal, 18 upper surface of mounting bracket
It is fixedly connected with pusher cylinder 16, the flexible shaft end of pusher cylinder 16 is equipped with scraping wings 15, and scraping wings 15 can be in pusher gas
Transverse shifting is carried out in 7 top position of moulding box under the action of cylinder 16, is located at 16 corresponding position of pusher cylinder in 1 upper surface of pedestal
On blanking plate 6 is installed, upper surface and the level ground of blanking plate 6 are obliquely installed, blanking plate 6 tilt high point one end and moulding box
7 upper surface flushes.
Angle between the blanking plate 6 and level ground is 15 °.
Two oil pipes 2 are connected on the oil cylinder 2 21, two oil pipes 2 extend to 1 outer fix of pedestal and two oil pipes 2
End be respectively connected with pipe fitting.
The oil cylinder 1 is respectively connected with hydraulic station with oil cylinder 2 21, is provided with to receive limit switch on hydraulic station
12 control chip, when crane 13 rises to the position contacted with limit switch 12, limit switch 12 passes to signal
Chip is controlled, the hydraulic station that control chip controls are connected with oil cylinder 1 is stopped.
The spring 4 is air spring.
The use process of this refractory brick production vibrating forming machine is：Mixture is poured into moulding box 7, starts oil cylinder one
9, oil cylinder 1 drives crane 13 to move downward, using pressure head 14 by mixture compaction moulding, during compaction moulding,
Vibration force is passed to the moulding box 7 on platform 17 by bobbing machine 3, and the mixture in moulding box 7 can flow under the action of vibration force
Each corner of moulding box 7 is conducive to the compactness for improving mixture, and since the pressing of pressure head 14 is above moulding box 7, moulding box 7 will shake
Power passes to pressure head 14, and 14 Self generating oscillations of pressure head due to being clearance fit between pressure head 14 and crane 13, and are pressed
It is provided with steel ball 22 between first 14 and the connecting plate 23 of top, pressure head 14 itself can be made to generate small size shake during the work time
It is dynamic, make oil cylinder 1, crossbeam 10 and column 8 generate the amplitude of vibration because pressure head 14 vibrates to reduce, is conducive to improve
The stability of equipment；
It is compacted after the completion of work, oil cylinder 1 drives crane 13 to move upwards, when 13 upper surface of crane touches limit switch
It is stopped when 12, in addition, the height of limit switch 12 can be adjusted using screw rod 11, to the rising limit to crane 13
Height is configured, and can efficiently reduce the consumption of power, saves electric energy；
After crane 13 rises, start oil cylinder 2 21, oil cylinder 2 21 can drive lifting bottom plate 5 to move upwards, to press
The export out of moulding box 7 of real molding blank, after blank is exported completely, pusher cylinder 16 pushes scraping wings 15 to push blank
To 6 surface of blanking plate, to complete the work of blanking.
Claims (6)
1. a kind of refractory brick production vibrating forming machine, it is characterised in that：Including pedestal, column, crossbeam, oil cylinder one and oil cylinder
Two, base upper surface corner location is vertically-mounted to have column, the upper end of column to be installed with crossbeam, the lower surface center of crossbeam
Position is installed with oil cylinder one, and the movable end of oil cylinder one is downward and end set has a crane, on the center of crane
Orientation, which is set, is installed with connecting plate, and the upper surface of connecting plate is connected with the movable end of oil cylinder one, under the middle part of crane
Orientation, which is set, is equipped with pressure head, there are gap between pressure head and connecting plate, is installed with multiple steel balls in gap, pressure head is with crane
Clearance fit, crane are slidably located on four columns, and screw thread is equipped with a screw rod on the vertical direction of crossbeam, screw rod
Limit switches are installed in lower end, are defined to the limit height position of crane by limit switch realization；Pedestal is indent
Type structure, the center that inner fovea part is are equipped with fixed seat, and the upper surface of fixed seat is offered uniformly to be divided around fixed seat center
At least four blind holes of cloth are provided with spring in blind hole, and the lower end of spring is fixedly connected on blind hole bottom surface, and the upper end of spring is solid
Dingan County is equipped with a locating ring, and the upper surface of locating ring is fixedly connected with platform, and the upper surface center of platform is equipped with moulding box,
It is provided with and can lift in the lifting bottom plate that vertical direction slides and be provided with oil cylinder two below bottom plate in moulding box, oil cylinder two is fixed
Mounted on the lower surface position of platform, the movable end of oil cylinder two is connected with lifting bottom plate, is fixedly mounted in the lower surface of platform
There are two bobbing machines, and automatic blanking device is equipped in the lateral location of pedestal.
2. a kind of refractory brick production vibrating forming machine according to claim 1, it is characterised in that：Automatic blanking device packet
The mounting bracket for being fixedly mounted on base side is included, mounting bracket upper surface is fixedly connected with pusher cylinder, and pusher cylinder is stretched
Contracting shaft end is equipped with scraping wings, and scraping wings can carry out transverse shifting under the action of pusher cylinder in moulding box top position,
Base upper surface, which is located on the corresponding position of pusher cylinder, is equipped with blanking plate, and the upper surface of blanking plate is tilted with level ground to be set
It sets, blanking plate tilts one end and the moulding box upper surface flush of high point.
3. a kind of refractory brick production vibrating forming machine according to claim 2, it is characterised in that：Blanking plate with flatly
Angle between face is 15 °.
4. a kind of refractory brick production vibrating forming machine according to claim 1, it is characterised in that：It is connected on oil cylinder two
Two oil pipes, two oil pipes extend to chassis outer side position and the end of two oil pipes and are respectively connected with pipe fitting.
5. a kind of refractory brick production vibrating forming machine according to claim 1, it is characterised in that：Oil cylinder one and oil cylinder two
It is respectively connected with hydraulic station, is provided with to receive the control chip of limit switch on hydraulic station.
6. a kind of refractory brick production vibrating forming machine according to claim 1, it is characterised in that：Spring is air bullet
Spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810441387.2A CN108453863A (en) | 2018-05-10 | 2018-05-10 | A kind of refractory brick production vibrating forming machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810441387.2A CN108453863A (en) | 2018-05-10 | 2018-05-10 | A kind of refractory brick production vibrating forming machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108453863A true CN108453863A (en) | 2018-08-28 |
Family
ID=63215260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810441387.2A Withdrawn CN108453863A (en) | 2018-05-10 | 2018-05-10 | A kind of refractory brick production vibrating forming machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108453863A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109262805A (en) * | 2018-11-02 | 2019-01-25 | 潍坊科技学院 | A kind of greenhouse structure soil block molding machine and its application method |
| CN109278159A (en) * | 2018-11-07 | 2019-01-29 | 山东港基建设集团有限公司 | A kind of construction brick pressure block device being easily installed |
| CN110802717A (en) * | 2019-10-21 | 2020-02-18 | 福建群峰机械有限公司 | Production process for improving building block forming efficiency |
-
2018
- 2018-05-10 CN CN201810441387.2A patent/CN108453863A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109262805A (en) * | 2018-11-02 | 2019-01-25 | 潍坊科技学院 | A kind of greenhouse structure soil block molding machine and its application method |
| CN109278159A (en) * | 2018-11-07 | 2019-01-29 | 山东港基建设集团有限公司 | A kind of construction brick pressure block device being easily installed |
| CN110802717A (en) * | 2019-10-21 | 2020-02-18 | 福建群峰机械有限公司 | Production process for improving building block forming efficiency |
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| PB01 | Publication | ||
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Application publication date: 20180828 |