CN107243605A - Penetrate sand device and penetrate the method that sand device makes film covered sand core using this - Google Patents
Penetrate sand device and penetrate the method that sand device makes film covered sand core using this Download PDFInfo
- Publication number
- CN107243605A CN107243605A CN201710407179.6A CN201710407179A CN107243605A CN 107243605 A CN107243605 A CN 107243605A CN 201710407179 A CN201710407179 A CN 201710407179A CN 107243605 A CN107243605 A CN 107243605A
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- Prior art keywords
- sand
- hole
- joint
- plate
- penetrate
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
- B22C15/23—Compacting by gas pressure or vacuum
Abstract
The invention discloses a kind of method penetrated sand device and make film covered sand core, this sand device of penetrating includes blowing plate, flexible pipe and penetrates sand joint, blowing plate has the installation portion for being used for being attached on shell core machine, and blowing plate and being provided with is used for the recess being connected with the sand export of shell core machine and the first hole connected with recess；One end of flexible pipe is connected to the first hole, and sand joint is penetrated in other end connection；Sand joint is penetrated with the second hole being connected with flexible pipe and the sandblasting hole connected with the second hole, sandblasting hole is used to be aligned with the sand hole that enters being placed in the core mold on ground；Penetrating sand device is used to transport the air pressure and precoated sand on shell core machine into core mold.Present invention utilization blows plate, flexible pipe and penetrates sand joint, air pressure and precoated sand on shell core machine by this is penetrated into sand device transported directly to and be placed in the core mold on ground, eliminate the work for carrying heavy core mold, fast and easy completes the making of film covered sand core, so as to reduce the labor intensity of workman, production efficiency is improved.
Description
Technical field
The present invention relates to film covered sand core field shaping technique, especially, it is related to one kind and penetrates sand device and penetrate sand using this
The method that device makes film covered sand core.
Background technology
Existing film covered sand core is made by adding sand station and penetrating the unified penetrating sand machine of sand station, and this penetrating sand machine is generally wrapped
Including rack, frame top is provided with storage sand storehouse, and the bottom in storage sand storehouse is sand export, is located in frame below storage sand storehouse and is provided with
Working position for placing core mold., it is necessary to which mould is transported to the working position of penetrating sand machine by operator during manufacture film covered sand core
On, after blast terminates, then it is transported to modulus on ground.Because many hand-coated core molds are all bulky metal patterns
Tool, mould causes very much mobile difficulty again, and making film covered sand core using this penetrating sand machine causes labor strength very big, production effect
Rate is low.
The content of the invention
Sand device is penetrated the invention provides a kind of and using this method for penetrating sand device making film covered sand core, to solve to move
Dynamic heaviness mould difficulty causes the technical problem that labor strength is big, efficiency is low.
The technical solution adopted by the present invention is as follows：
On the one hand, the present invention provides one kind and penetrates sand device, including blows plate, flexible pipe and penetrate sand joint, and blowing plate has for pacifying
The installation portion on shell core machine is filled to, plate is blown and is provided with the recess for being used for being connected with the sand export of shell core machine and is connected with recess
The first hole；One end of flexible pipe is connected to the first hole, and sand joint is penetrated in other end connection；Penetrating sand joint has the be connected with flexible pipe
Two holes and the sandblasting hole connected with the second hole, sandblasting hole are used to be aligned with the sand hole that enters being placed in the core mold on ground；
Penetrating sand device is used to transport the air pressure and precoated sand on shell core machine into core mold.
Alternatively, blow plate top surface be located at recess periphery place be also arranged with mounting groove, mounting groove be provided be used for seal
Blow the sealing ring in gap between plate and shell core machine.
Further, the first hole is in being horizontally disposed with, and installation position is in the bottom surface for blowing plate.The side for blowing plate is communicated with first
Screw is fixed in the screw in hole, one end of flexible pipe by hollow connector, and hollow connector has the screw rod to be locked in screw.
Further, the other end of flexible pipe is fixedly connected on by hollow connector penetrates sand joint, wherein, hollow connector has
Screw rod, the inwall in the second hole is correspondingly provided with the screw thread coordinated with screw rod.
Further, the transitional pore being additionally provided with sand joint between the second hole and sandblasting hole, the diameter of transitional pore are penetrated
Less than the diameter in the second hole, and in the intersection formation supporting table in transitional pore and the second hole；Buffering is installed with supporting table
There is the gap passed through for precoated sand under gas pressure between the inwall in plate, buffer board and the second hole.Buffer board includes and the
The circular body in gap, and the projection that autonomous agent is further protruded out are formed between the inwall in two holes, projection is interior with the second hole
Wall is interference fitted.
Alternatively, the bottom surface for penetrating sand joint is arranged with groove positioned at sandblasting hole periphery, is provided with groove for sealing
Penetrate the sealing ring in gap between sand joint and core mold.
On the other hand, present invention also offers a kind of using the above-mentioned method that sand device makes film covered sand core of penetrating, including
Following steps：The correspondence position of shell core machine plate will be blown is installed on, recess is located at below the sand export of shell core machine；By the one of flexible pipe
End, which is connected to, blows plate, and sand joint is penetrated in other end connection；Start shell core machine, be displaced downwardly to the sand storage bin of shell core machine and be pressed in the top for blowing plate
The recess on plate is blown in face, sand export alignment；The alignment of sand joint will be penetrated and be placed on ground entering in the core mold at preset distance
Sand hole；The Sand jet valve door of shell core machine is opened, air pressure and precoated sand on shell core machine is entered by blowing plate, flexible pipe and penetrating sand joint
Enter in core mold.
Further, the top surface for blowing plate is provided with positioned at sand export and the peripheral sealing ring of recess；It is pressed under sand storage bin
When blowing the top surface of plate, sealing ring, which is clamped in, to be blown between plate and sand storage bin, and sand export and recess formation are sealed to prevent
Sand leakage.
The present invention's penetrates sand device and the method for making film covered sand core, using blowing plate, flexible pipe and penetrating sand joint, by shell core machine
On air pressure and precoated sand sand device penetrated by this transport directly to and be placed in the core mold on ground, eliminate the heavy sand of carrying
The work of core mold, fast and easy completes the making of film covered sand core, so as to reduce the labor intensity of workman, improves production efficiency.
And this sand apparatus structure of penetrating is simple, convenient disassembly.
In addition to objects, features and advantages described above, the present invention also has other objects, features and advantages.
Below with reference to accompanying drawings, the present invention is further detailed explanation.
Brief description of the drawings
The accompanying drawing for constituting the part of the application is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its illustrate to be used to explain the present invention, do not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the structural representation penetrated when sand device makes film covered sand core using shell core machine of the preferred embodiment of the present invention；
Fig. 2 is the partial schematic diagram for blowing plate of the preferred embodiment of the present invention；
Fig. 3 is the top view for penetrating sand joint of the preferred embodiment of the present invention；
Fig. 4 is the sectional view along line A-A in Fig. 3；
Fig. 5 is the structural representation of buffer board in Fig. 3；
Fig. 6 is the flow chart of the method for the making film covered sand core of the preferred embodiment of the present invention.
Drawing reference numeral explanation：
1st, shell core machine；10th, sand storage bin；101st, sand export；11st, installing plate；2nd, core mold；20th, sand hole is entered；3rd, plate is blown；
30th, installation portion；31st, recess；32nd, the first hole；33rd, screw；34th, mounting groove；4th, flexible pipe；5th, hollow connector；6th, sand joint is penetrated；
60th, the second hole；61st, sandblasting hole；62nd, transitional pore；63rd, supporting table；64th, buffer board；640th, main body；641st, projection；65th, gap；
66th, groove；7th, sealing ring.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
Reference picture 1, the preferred embodiments of the present invention penetrate sand device there is provided one kind, for by the air pressure on shell core machine 1 and
Precoated sand is transported into the core mold 2 being placed on ground.There is sand storage bin 10 and immediately below sand storage bin 10 on shell core machine 1
The installing plate 11 of left and right two.Core mold 2 is placed in ground, and it is apart from the preset distance of shell core machine 1.
Penetrating sand device includes blowing plate 3, flexible pipe 4, two hollow connectors 5 and penetrating sand joint 6.Wherein, such as institute in Fig. 1 and Fig. 2
Show, blowing the bottom surface of plate 3 has the installation portion 30 for being used for being attached on the installing plate 11 of shell core machine 1, and the top surface for blowing plate 3 is recessed downwards
Have the recess 31 being connected for the sand export 101 with sand storage bin 10, from recess 31 further it is horizontal-extending have connected with recess 31
The first hole 32, be further extended with from the first hole 32 through the screw 33 of the side of plate 3 is blown, screw 33 is connected with the first hole 32,
And the inwall of screw 33 is provided with screw thread.The top surface for blowing plate 3 is also arranged with mounting groove 34, mounting groove 34 at the periphery of recess 31
It is provided with and blows sealing ring 7 between plate 3 and shell core machine 1 for sealing.
Reference picture 3 and Fig. 4, penetrate sand joint 6 with the second hole 60 being connected with flexible pipe 4 and the spray connected with the second hole 60
Sand hole 61, sandblasting hole 61 is used to be aligned with the sand hole 20 that enters in core mold 2.Specifically, the second hole 60, which is arranged at, penetrates sand joint 6
Upper end and through the upper surface of sand joint 6 is penetrated, the inwall in the second hole 60, which is provided with the screw thread coordinated with hollow connector 5, (does not scheme
Show).Sandblasting hole 61 is arranged at the lower end for penetrating sand joint 6 and runs through the lower surface for penetrating sand joint 6.Second hole 60 and sandblasting hole 61 it
Between be also associated with transitional pore 62, the diameter of transitional pore 62 is less than the diameter in the second hole 60, and in the hole 60 of transitional pore 62 and second
Intersection formation supporting table 63.It is installed with supporting table 63 between buffer board 64, the inwall in the hole 60 of buffer board 64 and second
With the gap 65 passed through for precoated sand under gas pressure.
As shown in Figure 5, buffer board 64 includes forming the circular body 640 in gap 65 between the inwall in the second hole 60,
And four projections 641 that the outer rim of autonomous agent 640 is further protruded out, the inwall interference fit in each hole 60 of projection 641 and second.
Sand joint 6 is penetrated in this preferred embodiment, by increasing buffer board 64, sand grains can be from gap when having air pressure in the second hole 60
65 project by and then from sandblasting hole 61；When there is no air pressure in the second hole 60, sand grains can by the block of buffer board 64 without
Spilt from sandblasting hole 61.Thus after coremaking completes closing shell core machine 1, flexible pipe 4 and penetrate in sand joint 6 that remaining sand grains will not
Spill, in coremaking next time, these remaining sand grains can be injected in core mold 2 under gas pressure, so as to avoid sand
Grain is scattered waste.Set in addition, the bottom surface for penetrating sand joint 6 is also arranged with the groove 66 positioned at the periphery of sandblasting hole 61, groove 66
Have for sealing the sealing ring (not shown) penetrated between sand joint 6 and core mold 2.
In the present embodiment, flexible pipe 4 is rubber hose, and its two ends is fixed on to blow plate 3 and penetrate sand by hollow connector 5 respectively to be connect
First 6.Hollow connector 5 uses rubber hose connection, and it includes hollow head and the hollow screw rod extended from head.Head
For filling in flexible pipe 4, screw rod is used for and blows the locking cooperation of the screw 33 on plate 3, or with penetrating the second hole 60 on sand joint 6
The screw thread of inwall coordinates.This attachment structure is simple, easy disassembly and reuse.
The present invention's penetrates sand device blowing plate 3, flexible pipe 4, hollow connector 5 and penetrate sand joint 6 by simple structure, by shell core
Air pressure and precoated sand on machine 1, which are penetrated sand device by this and transported directly to, to be placed in the core mold 2 on ground, eliminates carrying stupid
The work of heavy sand core mold 2, fast and easy completes the making of film covered sand core, so as to reduce the labor intensity of workman, improves production
Efficiency.And penetrate sand apparatus structure simple, the convenient disassembly, shell core machine 1 or difference available for connection different model of the present invention
Core mold 2.Blow plate 3 and penetrate the sealing ring that is set on sand joint 6, sealing can be formed at corresponding docking location,
Prevent sand leakage.Penetrating increases the design of buffer board 64 on sand joint 6 so that penetrate in sand joint 6 that sand grains smoothly enters when there is air pressure
Sandblasting hole 61, without air pressure when will not sand leakage.
Reference picture 6, the present invention is comprised the following steps using the above-mentioned method that sand device makes film covered sand core of penetrating：
Step S100, will blow plate 3 and is installed on the correspondence position of shell core machine 1, recess 31 is located at the sand export of shell core machine 1
101 lower sections；
Step S200, one end of flexible pipe 4 is connected to and blows plate 3, and sand joint 6 is penetrated in other end connection；
Step S300, starts shell core machine 1, is displaced downwardly to the sand storage bin 10 of shell core machine 1 and is pressed in the top surface for blowing plate 3, sand export
The recess 31 on plate 3 is blown in 101 alignments；
Step S400, will penetrate the alignment of sand joint 6 and is placed on ground in the core mold 2 at preset distance and enter sand hole 20；
Step S500, opens the Sand jet valve door of shell core machine 1, makes air pressure and precoated sand on shell core machine 1 by blowing plate 3, soft
Pipe 4 and penetrate sand joint 6 enter core mold 2 in.
Specifically, reference picture 1, this preferred embodiment using shell core machine 1 and it is above-mentioned penetrate sand device toward be placed on ground make a reservation for
Core mold 2 at distance penetrates sand to make film covered sand core, and wherein core mold 2 is no more than flexible pipe 4 apart from the distance of shell core machine 1
Scope reached by length.The method for making film covered sand core comprises the following steps：
Plate 3 will be blown to be removably installed on the installing plate 11 of left and right two of shell core machine 1, and the recess 31 that will be blown on plate 3
It is directed at the sand export 101 of the bottom of sand storage bin 10 of shell core machine 1.
Then a hollow connector 5 is installed on and blown on plate 3, made the screw rod on hollow connector 5 and blow the screw 33 on plate 3
Locking, then the one end of flexible pipe 4 is filled in on the head of hollow connector 5 be allowed to be connected with flexible pipe 4, and will consolidation jail therebetween with iron wire
Gu.
The other end of flexible pipe 4 connects another hollow connector 5 in the same way, and by the screw rod of this hollow connector 5
It is locked in and penetrates in the second hole 60 on sand joint 6.
Start shell core machine 1, its sand storage bin 10 is moved down until being pressed in the top surface for blowing plate 3, and plate 3 is blown in the alignment of sand export 101
On recess 31.Wherein, it is provided with due to blowing the top surface of plate 3 positioned at sand export 101 and the peripheral sealing ring 7 of recess 31, storage
When the top surface for blowing plate 3 is pressed under sand hopper 10, sealing ring 7 is clamped between the bottom surface of the top surface for blowing plate 3 and sand storage bin 10, and right
Sand export 101 and the formation sealing of recess 31 are to prevent leak-stopping sand.
Then the alignment of sand joint 6 will be penetrated and be placed on ground in the core mold 2 at preset distance and enter sand hole 20.
The Sand jet valve door of shell core machine 1 is opened, makes air pressure and precoated sand on shell core machine 1 by blowing plate 3, flexible pipe 4 and penetrating
Sand joint 6 enters in core mold 2, so as to complete coremaking.
The method of the making film covered sand core of the present invention, ground is placed in by core mold 2, using blowing plate 3, flexible pipe 4, hollow connect
First 5 and penetrate sand joint 6 air pressure and precoated sand on shell core machine 1 are penetrated into sand device by this and directly transport core mold on ground
In 2, the work for carrying heavy core mold 2 is eliminated, fast and easy completes the making of film covered sand core, reduces the work of workman
Intensity, improves production efficiency.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (10)
1. one kind penetrates sand device, it is characterised in that including blowing plate (3), flexible pipe (4) and penetrating sand joint (6), described to blow plate (3) tool
Have for being attached to installation portion (30) on shell core machine (1), it is described blow plate (3) and be provided be used to go out with the shell core machine (1)
The recess (31) of sand mouthful (101) linking and the first hole (32) connected with the recess (31)；One end of the flexible pipe (4)
It is connected to first hole (32), sand joint (6) is penetrated described in other end connection；The sand joint (6) of penetrating has and the flexible pipe
(4) the second hole (60) of connection and the sandblasting hole (61) that connect with second hole (60), the sandblasting hole (61) for
It is placed in the core mold on ground (2) and enters sand hole (20) alignment；The sand device of penetrating is used for the air pressure on shell core machine (1)
Transported with precoated sand into core mold (2).
2. according to claim 1 penetrate sand device, it is characterised in that the top surface for blowing plate (3) is located at the recess
(31) periphery place is also arranged with mounting groove (34), is provided with the mounting groove (34) for blowing plate (3) and shell core described in sealing
The sealing ring (7) in gap between machine (1).
3. according to claim 1 penetrate sand device, it is characterised in that first hole (32) is in horizontally disposed, the peace
Dress portion (30) is located at the bottom surface for blowing plate (3).
4. according to claim 3 penetrate sand device, it is characterised in that the side for blowing plate (3) is communicated with described
The screw (33), the sky are fixed in the screw (33) in one hole (32), one end of the flexible pipe (4) by hollow connector (5)
Heart joint (5) has the screw rod to be locked in the screw (33).
5. according to claim 1 penetrate sand device, it is characterised in that the other end of the flexible pipe (4) passes through hollow connector
(5) be fixedly connected on it is described penetrate sand joint (6), wherein, the hollow connector (5) has a screw rod, second hole (60) it is interior
Wall is correspondingly provided with the screw thread coordinated with the screw rod.
6. according to claim 1 penetrate sand device, it is characterised in that described penetrate is additionally provided with sand joint (6) positioned at described
Transitional pore (62) between second hole (60) and the sandblasting hole (61), the diameter of the transitional pore (62) is less than second hole
(60) diameter, and in the transitional pore (62) and the intersection of second hole (60) formation supporting table (63)；The support
Buffer board (64) is installed with platform (63), is had between the buffer board (64) and the inwall in second hole (60) for covering
The gap (65) that film sand passes through under gas pressure.
7. according to claim 6 penetrate sand device, it is characterised in that the buffer board (64) includes and second hole
(60) circular body (640) of the gap (65) is formed between inwall, and further protruded out from the main body (640)
Projection (641), the inwall of the projection (641) and second hole (60) is interference fitted.
8. according to claim 1 penetrate sand device, it is characterised in that the bottom surface for penetrating sand joint (6), which is arranged with, to be located at
It is provided with the groove (66) of the sandblasting hole (61) periphery, the groove (66) and described penetrates sand joint (6) and sand for sealing
The sealing ring in gap between core mold (2).
9. a kind of any described method for penetrating sand device making film covered sand core in usage right requirement 1 to 8, it is characterised in that
Comprise the following steps：
The correspondence position that plate (3) is installed on the shell core machine (1) is blown by described, the recess (31) is located at the shell core machine
(1) below sand export (101)；
By one end of the flexible pipe (4) be connected to it is described blow plate (3), penetrate sand joint (6) described in other end connection；
Start the shell core machine (1), make the sand storage bin (10) of the shell core machine (1) be displaced downwardly to be pressed in the top surface for blowing plate (3),
The recess (31) on plate (3) is blown described in sand export (101) alignment；
Penetrate sand joint (6) alignment by described and be placed on ground in the core mold at preset distance (2) and enter sand hole (20)；
The Sand jet valve door of the shell core machine (1) is opened, air pressure and precoated sand on the shell core machine (1) is blown plate by described
(3), the flexible pipe (4) and the sand joint (6) of penetrating enter in the core mold (2).
10. the method according to claim 9 for making film covered sand core, it is characterised in that the top surface for blowing plate (3) is set
There is the sealing ring (7) positioned at the sand export (101) and the recess (31) periphery；It is pressed under the sand storage bin (10) described
When blowing the top surface of plate (3), the sealing ring (7) be clamped in it is described blow between plate (3) and the sand storage bin (10), and to described
Sand export (101) and the recess (31) formation sealing are to prevent leak-stopping sand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710407179.6A CN107243605B (en) | 2017-06-02 | 2017-06-02 | Penetrate sand device and using this method for penetrating sand device production film covered sand core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710407179.6A CN107243605B (en) | 2017-06-02 | 2017-06-02 | Penetrate sand device and using this method for penetrating sand device production film covered sand core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107243605A true CN107243605A (en) | 2017-10-13 |
| CN107243605B CN107243605B (en) | 2019-03-22 |
Family
ID=60018193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710407179.6A Active CN107243605B (en) | 2017-06-02 | 2017-06-02 | Penetrate sand device and using this method for penetrating sand device production film covered sand core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107243605B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB470844A (en) * | 1935-11-21 | 1937-08-23 | Victor Storie | Improvements in or relating to foundry moulding and the like |
| DE1953818A1 (en) * | 1969-10-25 | 1971-05-06 | Georg Roeth | Sand injection device for sand foundry mould |
| DE2110270A1 (en) * | 1970-04-14 | 1971-10-28 | H. J. Welling - Technische und industrielle Beratung GmbH, 4150 Krefeld | Foundry blow moulding machine |
| GB1341983A (en) * | 1972-01-17 | 1973-12-25 | British Leyland Austin Morris | Production of foundry cores |
| JPS644862B2 (en) * | 1983-03-14 | 1989-01-27 | Mitsubishi Jukogyo Kk | |
| JPH066224B2 (en) * | 1989-07-18 | 1994-01-26 | 株式会社浪速製作所 | Peeping nozzle for heating mold |
| CN103846397A (en) * | 2012-11-30 | 2014-06-11 | 山西方盛液压机电设备有限公司 | Sand adding station and sand shooting station unified fully-automatic core shooter |
| CN204052814U (en) * | 2014-07-07 | 2014-12-31 | 魏洪校 | High sealing penetrates Sha Zui |
| CN204262296U (en) * | 2014-12-08 | 2015-04-15 | 广西玉柴机器股份有限公司 | Miniaturely penetrate sand machine |
-
2017
- 2017-06-02 CN CN201710407179.6A patent/CN107243605B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB470844A (en) * | 1935-11-21 | 1937-08-23 | Victor Storie | Improvements in or relating to foundry moulding and the like |
| DE1953818A1 (en) * | 1969-10-25 | 1971-05-06 | Georg Roeth | Sand injection device for sand foundry mould |
| DE2110270A1 (en) * | 1970-04-14 | 1971-10-28 | H. J. Welling - Technische und industrielle Beratung GmbH, 4150 Krefeld | Foundry blow moulding machine |
| GB1341983A (en) * | 1972-01-17 | 1973-12-25 | British Leyland Austin Morris | Production of foundry cores |
| JPS644862B2 (en) * | 1983-03-14 | 1989-01-27 | Mitsubishi Jukogyo Kk | |
| JPH066224B2 (en) * | 1989-07-18 | 1994-01-26 | 株式会社浪速製作所 | Peeping nozzle for heating mold |
| CN103846397A (en) * | 2012-11-30 | 2014-06-11 | 山西方盛液压机电设备有限公司 | Sand adding station and sand shooting station unified fully-automatic core shooter |
| CN204052814U (en) * | 2014-07-07 | 2014-12-31 | 魏洪校 | High sealing penetrates Sha Zui |
| CN204262296U (en) * | 2014-12-08 | 2015-04-15 | 广西玉柴机器股份有限公司 | Miniaturely penetrate sand machine |
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| Publication number | Publication date |
|---|---|
| CN107243605B (en) | 2019-03-22 |
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