CN109909163A - A kind of sorting equipment of the pin of different length - Google Patents
A kind of sorting equipment of the pin of different length Download PDFInfo
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- CN109909163A CN109909163A CN201910300403.0A CN201910300403A CN109909163A CN 109909163 A CN109909163 A CN 109909163A CN 201910300403 A CN201910300403 A CN 201910300403A CN 109909163 A CN109909163 A CN 109909163A
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Abstract
The present invention provides a kind of sorting equipment of the pin of different length, and including the sorter for sorting pin, the sorter promotes mouth, fixed disk and rotating disk to constitute by pin；The fixed disk is equipped with the infundibulate slope that a gradient is 5 ° to 10 °；The slope is located at below the rotating disk；The pin promotes mouth to be arranged on slope top of the slope edge；The pin promotes mouth and the rotating disk to set in the same plane, and the pin promotes mouth to be located in the diametrical direction of the rotating disk；It is arranged fluted on the rotating disk side, is provided with the baffle for preventing pin from gliding along the slope below the groove；The unequal hollow slots of at least two length are provided on slope described in the direction of slope；Diameter is R, length LiPin when moving to above hollow slots, when pin one end make somebody a mere figurehead above hollow slots and center of gravity also above hollow slots when, pin passes through the hollow slots, otherwise moves to above next hollow slots.
Description
Technical field
The present invention relates to a kind of sorting equipments, refer in particular to a kind of sorting equipment of the pin of different length.
Background technique
When different length pin is obscured, typically by manually being selected, it is easy to appear manual operation mistakes in the process
Accidentally, it and takes time and effort, human cost height, is also unfavorable for efficient mechanical and is turned into industry.
Summary of the invention
The technical problems to be solved by the present invention are: the pin of different length is carried out automatic sorting.
In order to solve the above-mentioned technical problem, a kind of the technical solution adopted by the present invention are as follows: sorting of the pin of different length
Device, including the sorter for sorting pin, the sorter promotes mouth, fixed disk and rotating disk to constitute by pin；It is described
Fixed disk is equipped with the infundibulate slope that a gradient is α；The slope is located at below the rotating disk；The pin promotes
Mouth is arranged on slope top of the slope edge；The pin promotes mouth and the rotating disk to set in the same plane, and described
Pin promotes mouth to be located in the diametrical direction of the rotating disk；It is arranged fluted on the rotating disk side, is set below the groove
It is equipped with the baffle for preventing pin from gliding along the slope；It is long that at least two are provided on slope described in the direction of slope
The unequal and length of degree is Ai, width be B hollow slots；Diameter is R, length LiPin move to the hollow out
When above slot, the contact length of pin lower end and the slope is Ci, work as Ci<[Li- R/tan (90 ° of-α)]/2 and 0≤(Ai+
Ci)-LiWhen≤0.5mm, pin passes through the hollow slots, otherwise, moves to above next hollow slots；Wherein, 5 °≤α≤
10 °, B > R, i are natural number.
Further, after the groove and the pin promote mouth to meet, the length of the hollow slots met with it by
Step increases.
Further, the first feeding tube that further include the first loading plate and diameter is Φ, first loading plate pass through institute
It states the first feeding tube and promotes mouth to connect with the pin；Wherein, Φ=R+ compensates width, and the value range of the compensation width is
0.2-0.8mm。
Further, first feeding pan bottom is provided with the first high-frequency vibration disk, and the first loading plate side wall is set
It is equipped with the first track, first track one end connects the first high-frequency vibration disk, and the other end and first feeding tube connect
It connects.
It further, further include the turnable weighing that processing center, rejected product disk, quantity and the hollow slots match
Disk, structure for conveying and qualified product disk；Pin falls into the corresponding weighing pan, the processing center after passing through the hollow slots
Receive the weighing pan weight signal post analysis formed the corresponding weighing pan overturning of control signal control, control it is corresponding
The structure for conveying transports pin to the rejected product disk or the corresponding qualified product disk.
Further, further include quantity and the second loading plate and the second feeding tube that the hollow slots match；Described
Two loading plates and second feeding tube junction are provided with control valve；The hollow slots are arranged in corresponding second feeding
Above disk, the outlet of second feeding tube is arranged above the corresponding weighing pan；The processing center controls the control
Valve processed.
Further, second feeding pan bottom is provided with the second high-frequency vibration disk, and the second loading plate side wall is set
It is equipped with the second track, second track one end connects the second high-frequency vibration disk, and the other end and second feeding tube connect
It connects.
It further, further include motor and blanking channel；The processing center is controlled indirectly by controlling the motor movement
Make the structure for conveying；The blanking channel is provided between the hollow slots and second loading plate.
Further, the structure for conveying is the V-type disk controlled by mechanical arm；The groove at least 2, and uniformly
It is distributed on the rotating disk edge；There are five the hollow slots, corresponding length be respectively 4.5mm, 5.0mm, 5.5mm,
7.0mm、8.0mm。
Further, the groove has 6, sorts the diameter R=3.175mm, the first feeding tube width Φ of pin
=3.675mm；The qualified product disk includes third loading plate and third feeding tube, and third feeding pan bottom is provided with third
High-frequency vibration disk, the third loading plate side wall are provided with third track, and third track one end connects the third high frequency
Vibrating disc, the other end are connect with the third feeding tube；First vibrating disc, second vibrating disc and the third shake
The vibration frequency of disk is 20Hz-30Hz；The width of first track, second track and the third track is D,
In, R < D < 2R.
The beneficial effects of the present invention are: when the groove in rotating disk promotes mouth to meet with pin, pin is pushed into recessed
In slot, and front end is fallen on slope.Due to the blocking of baffle, pin is rested on slope and is no longer glided.Rotating disk band
Pin rotation in dynamic groove makes hollow slots of the pin one by one by being arranged on slope.If (Ai+Ci)<LiWhen, pin two
End is stuck on hollow slots both ends, and pin can not pass through hollow slots；Otherwise, pin one end is maked somebody a mere figurehead above hollow slots.When pin one
When end-rack sky is above hollow slots, if Ci<[Li- R/tan (90 ° of-α)]/2, pin center of gravity is located above hollow slots, according to lever
Principle, pin are fallen into hollow slots；Otherwise, pin can not pass through hollow slots.The pin of different length is by different length
When hollow slots, eligible Ci<[Li- R/tan (90 ° of-α)]/2 and 0≤(Ai+Ci)-LiThe pin of≤0.5mm falls into corresponding engrave
It in empty slot, is otherwise transferred to above next hollow slots, and then achievees the purpose that sort pin.
Detailed description of the invention
Specific structure of the invention is described in detail with reference to the accompanying drawing
Fig. 1 is a kind of a kind of structure schematic diagram of embodiment of the sorting equipment of the pin of different length of the invention；
Fig. 2 is a kind of a kind of sorter top view of embodiment of the sorting equipment of the pin of different length of the invention；
Fig. 3 is a kind of structure top view of the first loading plate of the sorting equipment of the pin of different length of the invention；
Wherein, 1- pin promotes mouth, 2- rotating disk, 21- groove, 3- fixed disk, 31- slope, 32- baffle, 33- hollow out
Slot, the first loading plate of 4-, the first vibrating disc of 41-, the first track of 42-, the first feeding tube of 5-, 6- blanking channel, the second feeding of 7-
Disk, 8- control valve, the second feeding tube of 9-, 10- weighing pan, 11- structure for conveying, 12- processing center, 13- qualified product disk, 14- is not
Qualified product disk.
Specific embodiment
The most critical design of the present invention is: when pin is located above hollow slots, if (Ai+Ci)<LiWhen, pin both ends card
On hollow slots both ends, pin can not pass through hollow slots；Otherwise, pin one end is maked somebody a mere figurehead above hollow slots.When one end-rack of pin
When sky is above hollow slots, if Ci<[Li- R/tan (90 ° of-α)]/2, pin center of gravity is located above hollow slots, according to lever principle,
Pin is fallen into hollow slots；Otherwise, pin can not pass through hollow slots.The pin of different length passes through the hollow slots of different length
When, eligible Ci<[Li- R/tan (90 ° of-α)]/2 and 0≤(Ai+Ci)-LiThe pin of≤0.5mm falls into corresponding hollow slots,
Otherwise next hollow slots are transferred to, and then achieve the purpose that sort pin.
For the present invention will be described in detail design feasibility, in conjunction with technology contents of the invention, construction feature, realized purpose
And effect, embodiment and attached drawing is cooperated to be explained in detail.
Please refer to Fig. 1 and Fig. 2, a kind of sorting equipment of the pin of different length, including the sorting for sorting pin
Disk, the sorter promote mouth 1, fixed disk 3 and rotating disk 2 to constitute by pin；It is α's that the fixed disk 3, which is equipped with a gradient,
Infundibulate slope 31；The slope 31 is located at 2 lower section of rotating disk；The pin promotes mouth 1 to be arranged on the slope
On 31 top of the slope edge of face；The pin promotes mouth 1 and the rotating disk 2 to set in the same plane, and the pin promotes 1, mouth
In in the diametrical direction of the rotating disk 2；Fluted 21 are arranged on 2 side of rotating disk, is provided with below the groove 21 anti-
Shotpin follows closely the baffle 32 to glide along the slope 31；It is long that at least two are provided on slope 31 described in the direction of slope
The unequal and length of degree is Ai, width be B hollow slots 33；Diameter is R, length LiPin move to one described in engrave
When 33 top of empty slot, the contact length of pin lower end and the slope 31 is Ci, work as Ci<[Li- R/tan (90 ° of-α)]/2 and 0
≤(Ai+Ci)-LiWhen≤0.5mm, pin passes through the hollow slots 33, otherwise, moves to next 33 top of the hollow slots；Wherein,
5 °≤α≤10 °, B > R, i are natural number.
As can be seen from the above description, the beneficial effects of the present invention are: when the groove 21 and pin propulsion mouth 1 in rotating disk 2
When meeting, pin is pushed into groove 21, and front end is fallen on slope 31.Due to the blocking of baffle 32, pin is rested on
It no longer glides on slope 31.Rotating disk 2 drives the pin rotation in groove 21, and pin is made to pass through setting one by one in slope 31
On hollow slots 33.If (Ai+Ci)<LiWhen, pin both ends are stuck on 33 both ends of hollow slots, and pin can not pass through hollow slots 33；It is no
Then, pin one end is maked somebody a mere figurehead above hollow slots 33.When pin one end is maked somebody a mere figurehead above hollow slots 33, if Ci<[Li-R/tan
(90 ° of-α)]/2, pin center of gravity is located at 33 top of hollow slots, and according to lever principle, pin is fallen into hollow slots 33；Otherwise, it sells
Nail can not pass through hollow slots 33.When the pin of different length passes through the hollow slots 33 of different length, eligible Ci<[Li-R/tan
(90 ° of-α)]/2 and 0≤(Ai+Ci)-LiThe pin of≤0.5mm is fallen into corresponding hollow slots 33, is otherwise transferred to next engrave
33 top of empty slot, and then achieve the purpose that sort pin.Baffle 32 can be set on slope 31, also can be set and is rotating
On disk 2.
Further, after the groove 21 promotes mouth 1 to meet with the pin, the length for the hollow slots 33 met with it
Degree incrementally increases.33 length of hollow slots incrementally increases, and makes short pin will not be because of by longer 33 top of hollow slots and rotation
The shake of turntable 2 causes short pin being accidentally divided into longer pin, that is, reduces sorting mistake.
Further, the first feeding tube 5 that further include the first loading plate 4 and diameter is Φ, first loading plate 4 pass through
First feeding tube 5 promotes mouth 1 to connect with the pin；Wherein, Φ=R+ compensates width, the value model of the compensation width
It encloses for 0.2-0.8mm.By the first loading plate 4 and the first feeding tube 5, pin is facilitated to promote mouth 1 to enter sorter by pin.
Further, referring to Fig. 3,4 bottom of the first loading plate is provided with the first high-frequency vibration disk 41, described first
4 side wall of loading plate is provided with the first track 42, and described first track, 42 one end connects the first high-frequency vibration disk 41, the other end
It is connect with first feeding tube 5.Pin ajusts automatically and promotes on the first track 42 moving ahead by way of crossing and shaking,
It realizes automatically into sorter.
It further, further include that processing center 12, rejected product disk 14, quantity are turned over what the hollow slots 33 matched
Turn weighing pan 10, structure for conveying 11 and qualified product disk 13；Pin falls into the corresponding weighing after passing through the hollow slots 33
Disk 10, it is corresponding described that the weight signal post analysis that the processing center 12 receives the weighing pan 10 forms control signal control
The overturning of weighing pan 10 controls the corresponding transport pin of the structure for conveying 11 to the rejected product disk 14 or the corresponding conjunction
Lattice product disk 13.By way of weighing, the pin by sorting is examined to guarantee the standard of sorting with the presence or absence of the situation of sorting mistake
True property.It is automatically controlled by processing center 12, whether intelligent recognition sorting error situations occurs, and rejects corresponding sorting mistake
Pin.
Further, further include quantity and the second loading plate 7 and the second feeding tube 9 that the hollow slots 33 match；Institute
It states the second loading plate 7 and second feeding tube, 9 junction is provided with control valve 8；The hollow slots 33 are arranged in corresponding institute
9 top of the second loading plate is stated, the outlet of second feeding tube 9 is arranged above the corresponding weighing pan 10；The processing
Center 12 controls the control valve 8.Before pin falls into weighing pan 10 after hollow slots 33, the second loading plate 7, control are first passed through
Valve 8 and the second feeding tube 9.Processing center 12 controls a pin and leaves weighing pan 10, then controls the opening of control valve 8 and allows again
One pin is fallen into weighing pan 10 by the second feeding tube 9, so realize control across hollow slots 33 pin advantageously by
A effect weighed by weighing pan 10.
Further, 7 bottom of the second loading plate is provided with the second high-frequency vibration disk, 7 side wall of the second loading plate
It is provided with the second track, second track one end connects the second high-frequency vibration disk, the other end and second feeding tube 9
Connection.Pin is ajusted automatically and is promoted in orbit moving ahead by way of crossing and shaking, realize automatically into weighing pan 10.
It further, further include motor and blanking channel 6；The processing center 12 is indirect by controlling the motor movement
Control the structure for conveying 11；The blanking channel 6 is provided between the hollow slots 33 and second loading plate 7.Blanking
Each 33 lower space of hollow slots is separated by channel 6, prevents pin from occurring falling mistake in dropping process.Pass through motor
Control structure for conveying 11 does back and forth movement.
Further, the structure for conveying 11 is the V-type disk controlled by mechanical arm；The groove 21 at least 2, and
It is evenly distributed on 2 edge of rotating disk；There are five the hollow slots 33, corresponding length be respectively 4.5mm, 5.0mm,
5.5mm,7.0mm,8.0mm.Motor-controlled mechanical arm realizes that structure for conveying 11 precisely does back and forth movement.V-type disk, which is located at, to be claimed
Again when 10 lower section of disk, the pin fallen is caught；When moving to qualified product disk 13 or rejected product 14 top of disk, processing center 12 is controlled
V-type disk processed opening of trying to get to the heart of a matter allows pin to fall.Processing center 12 controls V-type disk and restores V-shape, and then control returns to weighing pan 10
Lower section.Multiple grooves 21 are set, enable rotating disk 2 in the same swing circle while carrying out multiple pin sortings, accelerate to divide
Pick speed.According further to common length of pin, the hollow slots 33 that 4.5mm long is arranged are used to sort the pin of 8mm long, setting
The hollow slots 33 of 5.0mm long are used to sort the pin of 9mm long, and the hollow slots 33 of setting 5.5mm long are used to sort the pin of 10mm long
Nail, the hollow slots 33 of setting 7.0mm long are used to sort the pin of 12mm long, and the hollow slots 33 of setting 8.0mm long are for sorting
The pin of 15mm long.
Further, the groove 21 has 6, sorts the diameter R=3.175mm of pin, the first feeding tube width
Φ=3.675mm；The qualified product disk 13 includes third loading plate and third feeding tube, and third feeding pan bottom is provided with
Third high-frequency vibration disk, the third loading plate side wall are provided with third track, and third track one end connects the third
High-frequency vibration disk, the other end are connect with the third feeding tube；First vibrating disc 41, second vibrating disc and described the
The vibration frequency of three vibrating discs is 20Hz-30Hz；The width of first track 42, second track and the third track
Degree is D, wherein R < D < 2R.It is 3.175mm that a sorting diameter, which is arranged, according to client's requirement, wide using the compensation of 0.5mm
The diameter width for the first feeding tube 5 that degree setting obtains is 3.675mm.6 grooves 21 are set in rotating disk 2.The qualified product
Disk 13 be set as include third loading plate and third feeding tube structure, convenient for by the pin sorted put neatly, for carry out from
Dynamic nailing feeding is ready work.
In actual production, second loading plate 7, the qualified product disk 13 and the rejected product disk 14
It selects structure, use principle loading plate identical with first loading plate 4.
In conclusion a kind of sorting equipment of the pin of different length provided by the invention, when in rotating disk groove with
When pin promotes mouth to meet, pin is pushed into groove, and front end is fallen on slope.Due to the blocking of baffle, pin stops
It stays on slope and no longer glides.Rotating disk drives the pin rotation in groove, and pin is made to pass through setting one by one on slope
Hollow slots.If (Ai+Ci)<LiWhen, pin both ends are stuck on hollow slots both ends, and pin can not pass through hollow slots；Otherwise, pin
It makes somebody a mere figurehead above hollow slots one end.When pin one end is maked somebody a mere figurehead above hollow slots, if Ci<[Li- R/tan (90 ° of-α)]/2, pin
Nail center of gravity is located above hollow slots, and according to lever principle, pin is fallen into hollow slots；Otherwise, pin can not pass through hollow slots.
When the pin of different length passes through the hollow slots of different length, eligible Ci<[Li- R/tan (90 ° of-α)]/2 and 0≤(Ai+
Ci)-LiThe pin of≤0.5mm is fallen into corresponding hollow slots, is otherwise transferred to above next hollow slots, and then reach sorting
The purpose of pin.Enter sorter sorting by the first loading plate automatic charging, title is entered by the second loading plate automatic charging
Disk carries out sorting inspection again, does nailing preparation by third loading plate automatic charging.A set of independence is corresponded to after each hollow slots
The knot comprising blanking channel, the second loading plate, the second feeding tube, control valve, weighing pan, structure for conveying and qualified product disk etc.
Structure guarantees that the pin of different length is not in aliasing again after sorter sorts；But it shares in the same control
The heart controls different control valves, weighing pan and structure for conveying.
Herein first, second ... only represents the differentiation of its title, not representing their significance level and position has what
It is different.
Herein, up, down, left, right, before and after only represents its relative position without indicating its absolute position.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure transformation made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant technical fields,
Similarly it is included within the scope of the present invention.
Claims (10)
1. a kind of sorting equipment of the pin of different length, which is characterized in that including the sorter for sorting pin, described point
It picks disk and promotes mouth, fixed disk and rotating disk to constitute by pin；The fixed disk is equipped with the infundibulate slope that a gradient is α；
The slope is located at below the rotating disk；The pin promotes mouth to be arranged on slope top of the slope edge；The pin
Nail promotes mouth and the rotating disk to set in the same plane, and pin propulsion mouth is located at the diametrical direction of the rotating disk
On；It is arranged fluted on the rotating disk side, is provided with the gear for preventing pin from gliding along the slope below the groove
Plate；It is provided with that at least two length are unequal and length is A on slope described in the direction of slopei, width be that B is engraved
Empty slot；Diameter is R, length LiPin when moving to above the hollow slots, pin lower end connects with the slope
Touching length is Ci, work as Ci<[Li- R/tan (90 ° of-α)]/2 and 0≤(Ai+Ci)-LiWhen≤0.5mm, pin passes through the hollow slots, no
Then, it moves to above next hollow slots；Wherein, 5 °≤α≤10 °, B > R, i are natural number.
2. the sorting equipment of the pin of different length as described in claim 1, which is characterized in that the groove is pushed away with the pin
After import is met, the length for the hollow slots met with it is incrementally increased.
3. the sorting equipment of the pin of different length as claimed in claim 2, which is characterized in that further include the first loading plate and straight
Diameter is the first feeding tube of Φ, and first loading plate promotes mouth to connect by first feeding tube with the pin；Wherein,
Φ=R+ compensates width, and the value range of the compensation width is 0.2-0.8mm.
4. the sorting equipment of the pin of different length as claimed in claim 3, which is characterized in that first feeding pan bottom is set
It is equipped with the first high-frequency vibration disk, the first loading plate side wall is provided with the first track, described in the connection of first track one end
First high-frequency vibration disk, the other end are connect with first feeding tube.
5. the sorting equipment of the pin of different length as claimed in claim 4, which is characterized in that further include processing center, do not conform to
Turnable weighing pan, structure for conveying and the qualified product disk that lattice product disk, quantity and the hollow slots match；Pin passes through described
The corresponding weighing pan is fallen into after hollow slots, the weight signal post analysis that the processing center receives the weighing pan forms control
Signal processed controls the corresponding weighing pan overturning, controls the corresponding structure for conveying transport pin to the rejected product disk
Or the corresponding qualified product disk.
6. the sorting equipment of the pin of different length as claimed in claim 5, which is characterized in that further include quantity and the hollow out
The second loading plate and the second feeding tube that slot matches；Second loading plate and second feeding tube junction are provided with control
Valve processed；The hollow slots are arranged above corresponding second loading plate, and the outlet of second feeding tube is arranged in correspondence
The weighing pan above；The processing center controls the control valve.
7. the sorting equipment of the pin of different length as claimed in claim 6, which is characterized in that second feeding pan bottom is set
It is equipped with the second high-frequency vibration disk, the second loading plate side wall is provided with the second track, described in the connection of second track one end
Second high-frequency vibration disk, the other end are connect with second feeding tube.
8. the sorting equipment of the pin of different length as claimed in claim 7, which is characterized in that further include that motor and blanking are logical
Road；The processing center indirectly controls the structure for conveying by controlling the motor movement；The hollow slots and described second
The blanking channel is provided between loading plate.
9. the sorting equipment of the pin of different length as claimed in claim 8, which is characterized in that the structure for conveying is to pass through machine
The V-type disk of tool arm control；The groove at least 2, and be evenly distributed on the rotating disk edge；The hollow slots have five
A, corresponding length is respectively 4.5mm, 5.0mm, 5.5mm, 7.0mm, 8.0mm.
10. the sorting equipment of the pin of different length as claimed in claim 9, which is characterized in that the groove has 6, sorting
The diameter R=3.175mm, the first feeding tube width Φ=3.675mm of pin；The qualified product disk includes third loading plate
With third feeding tube, third feeding pan bottom is provided with third high-frequency vibration disk, and the third loading plate side wall is provided with
Third track, third track one end connect the third high-frequency vibration disk, and the other end is connect with the third feeding tube；Institute
The vibration frequency for stating the first vibrating disc, second vibrating disc and the third vibrating disc is 20Hz-30Hz；First rail
The width in road, second track and the third track is D, wherein R < D < 2R.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910300403.0A CN109909163B (en) | 2019-04-15 | 2019-04-15 | Sorting device for pins with different lengths |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910300403.0A CN109909163B (en) | 2019-04-15 | 2019-04-15 | Sorting device for pins with different lengths |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109909163A true CN109909163A (en) | 2019-06-21 |
| CN109909163B CN109909163B (en) | 2022-02-18 |
Family
ID=66969890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910300403.0A Active CN109909163B (en) | 2019-04-15 | 2019-04-15 | Sorting device for pins with different lengths |
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| Country | Link |
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| CN (1) | CN109909163B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112774994A (en) * | 2020-12-24 | 2021-05-11 | 广州风神汽车有限公司 | Screening plant suitable for different length materials |
| CN115007464A (en) * | 2022-06-29 | 2022-09-06 | 中国十七冶集团有限公司 | Concrete quality screening device and concrete quality screening method |
| CN116727274A (en) * | 2023-08-15 | 2023-09-12 | 沧州坤厚塑胶科技有限公司 | Bag making machine |
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| CN112774994A (en) * | 2020-12-24 | 2021-05-11 | 广州风神汽车有限公司 | Screening plant suitable for different length materials |
| CN112774994B (en) * | 2020-12-24 | 2022-03-08 | 广州风神汽车有限公司 | Screening plant suitable for different length materials |
| CN115007464A (en) * | 2022-06-29 | 2022-09-06 | 中国十七冶集团有限公司 | Concrete quality screening device and concrete quality screening method |
| CN116727274A (en) * | 2023-08-15 | 2023-09-12 | 沧州坤厚塑胶科技有限公司 | Bag making machine |
| CN116727274B (en) * | 2023-08-15 | 2023-10-20 | 沧州坤厚塑胶科技有限公司 | Bag making machine |
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