CN110064738B - Double-box sand mold for casting aluminum alloy parts - Google Patents
Double-box sand mold for casting aluminum alloy parts Download PDFInfo
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- CN110064738B CN110064738B CN201910391919.0A CN201910391919A CN110064738B CN 110064738 B CN110064738 B CN 110064738B CN 201910391919 A CN201910391919 A CN 201910391919A CN 110064738 B CN110064738 B CN 110064738B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C21/00—Flasks; Accessories therefor
- B22C21/08—Clamping equipment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C21/00—Flasks; Accessories therefor
- B22C21/10—Guiding equipment
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Abstract
The invention belongs to the technical field of metal casting and processing, and particularly relates to a double-box sand mold for casting aluminum alloy parts. The sand box comprises a cope box and a drag box, wherein the cope box and the drag box are fixed through bolts, the outer wall of the sand box is provided with pin holes, the outer sides of the pin holes are provided with baffle plates, the right sides of the baffle plates are provided with clamping grooves for fixing the baffle plates, and strong magnet lantern rings are arranged in the screw holes; a cushion tube is arranged in the strong magnet lantern ring, and a corrugated spring is sleeved in a gap between the outer side of the cushion tube and the screw hole; the upper section and the lower section of the screw rod of the bolt are provided with external threads matched with the internal threads in the screw hole, the surface of the middle section of the screw rod is free of threads, and the middle section of the screw rod is provided with two necking necks with gradually reduced diameters; a limiting pin is arranged in the pin hole, and a U-shaped groove is arranged at the front end of the limiting pin; the sand mold has the advantages of high structural strength, strong fastening effect, relatively better anti-seismic and heat-resistant anti-deformation effects, no locking of the screw rod in the casting process, and convenience in demolding.
Description
Technical Field
The invention belongs to the technical field of metal casting and processing, and particularly relates to a double-box sand mold for casting aluminum alloy parts.
Background
The casting is a method of casting liquid metal into a casting cavity which is adaptive to the shape of a part, and obtaining the part or a blank after the liquid metal is cooled and solidified; is one of the most common processing methods for metal parts with complex structures. The casting mold used for casting is mainly made of sand, metal and ceramic; the sand mold has the advantages of convenient processing, easy demolding and low cost, so the sand mold is the most important casting mold material.
According to different morphological characteristics, common casting sand molds comprise different types such as a two-box sand mold, a three-box sand mold, a pit sand mold, a core assembly sand mold and the like, the two-box sand mold is the simplest sand mold structure and can be suitable for part casting of most structures, and the joint surface of an upper sand box and a lower sand box is the parting surface of a part mold; such a cast sand mould is very easy to lift.
The mould needs to be assembled and fixed in the sand casting process, the stable assembly of the sand mould determines the precision of the processing mould, and if the structure of the sand mould cannot be assembled correctly, stably and firmly, the mould may be deformed or have structural defects due to the deviation caused by the actions of self weight, scouring or vibration of molten metal and the like. In addition, the sand filling is shocked in the preparation process of the sand mold, so that the raw sand is compact, and the defects of the cast parts can be caused due to loose combination of the raw sand. The vibration in the sand tightening process can influence the bonding strength of the sand mold; conventional molding fixing device includes bolt and buckle etc. and the fastening of bolt is better, and is shock-resistant, still can remain stable in the tight sand in-process of experience jarring effect, but because can release a large amount of heats in the casting process sand mould, the heat can lead to taking place to warp between bolt and the screw, finally leads to the bolt lock to disassemble for the sand mould and cause the difficulty with the drawing of patterns of part base. The heat-resistant anti-deformation effect of the buckle is good, and the problem of locking is not easy to occur; but the stability of buckle fastening effect is relatively poor, appears becoming flexible easily in vibration environment to influence the compact effect of sand mould and the machining precision of casting parts.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to design a double-box sand mold for casting aluminum alloy parts, which has high structural strength and strong fastening effect; the sand mould is better in shock resistance and heat resistance and deformation prevention effect, the screw rod cannot be locked in the casting process, and the demoulding is more convenient.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a double-box sand mold for casting aluminum alloy parts comprises a cope flask and a drag flask, wherein the cope flask and the drag flask are fixed through bolts, screw holes which penetrate through the upper part and the lower part are formed in the side walls of the cope flask and the drag flask, and internal threads are formed in the upper half part of the cope flask and the lower half part of the drag flask in the screw holes; the lower half part of the upper sand box and the upper half part of the lower sand box are provided with unthreaded through holes, and the inner diameter of the unthreaded through hole section is larger than that of the threaded section; the outer walls of the through hole sections in the upper sand box and the lower sand box are provided with pin holes, the outer sides of the pin holes are provided with baffle plates which can rotate along the outer walls of the sand moulds, the cross sections of the baffle plates are in a 7 shape, the front ends of the baffle plates are provided with clamping parts which vertically extend inwards, the right sides of the baffle plates are provided with clamping grooves for fixing the baffle plates, and the openings of the clamping grooves are upward;
a strong magnet lantern ring is arranged in the through hole section of the screw hole; the strong magnet lantern ring is respectively composed of a semi-annular N pole and an S pole; a cushion pipe is arranged in the strong magnet lantern ring and is formed by splicing a left part and a right part which are symmetrical along the axis; the upper end and the lower end of the cushion pipe are provided with outward bending parts; the surface of the cushion pipe is provided with pin holes corresponding to the outer walls of the upper sand box and the lower sand box; a corrugated spring is sleeved in a gap between the outer side of the cushion pipe and the screw hole;
the upper section and the lower section of the screw rod of the bolt are provided with external threads matched with the internal threads in the screw hole, the surface of the middle section of the screw rod is not provided with threads, and the middle section of the screw rod is provided with two necking necks with gradually reduced diameters; the necking necks are respectively positioned at the corresponding positions of the pin holes in the upper sand box and the lower sand box after the screw rod is installed;
set up the spacer pin in the pinhole, the spacer pin front end sets up U type groove, and the edge of U type groove front end sets up and receives the shape assorted chamfer of necking down.
Wherein, the top of bolt is equipped with the nut, and the bottom is stipulated through the nut, and the nut quantity that the bottom is connected is two, is located the inboard nut top and is equipped with the cushion washer, and wherein, the nut below also sets up the cushion washer.
The double-nut connection can generate a self-locking effect, so that the nut is prevented from loosening due to self-rotation on the bolt; the gasket can absorb the effort of screw rod axis direction, promotes the antidetonation effect of sand mould.
During this sand mould assembly, with cope flask and drag flask equipment, then screw in inserting the screw with the bolt, observe the position of receipts necking down in the bolt through the pinhole on cope flask and the drag flask, treat when flexible neck is in pinhole department, insert the pinhole with the spacer pin, the chucking bolt, then rotate pinhole department with the baffle again for the joint portion of baffle front end inserts the joint inslot, and at this moment, the baffle supports tight spacer pin. And finally, locking the bottom of the bolt through double nuts.
When the sand mold is used, raw sand is filled into the sand box and is compacted through kneading, extruding, vibrating and other modes; then casting molten metal into the cavity; after the part is cooled and formed, the nut below the bolt is detached, then the baffle is rotated to be opened, the limiting pin is pulled out, and finally the bolt is screwed out.
Preferably, the limiting pin is inserted into the pin hole to be tightly clamped with the bolt, and the baffle plate rotates into the clamping groove to be locked; the tail end of the limiting pin just abuts against the baffle. The limiting pin is mainly used for fixing the bolt, so that the problem that the bolt is loosened by self-rotation and displaced along an axis in the vibration process is solved; the middle section of the screw can be prevented from being deformed in the direction vertical to the axis due to heating, so that the screw is difficult to take out.
Preferably, the strong magnet collar is made of alnico permanent magnets with high curie temperature; the strong magnet lantern ring is sleeved outside the cushion pipe and fixedly connected with the cushion pipe through the elastic buffer piece, and the outer diameter of the strong magnet lantern ring is smaller than that of the corrugated spring.
The effect of bolster is that the cushion pipe deformation is prevented to cause the influence to the structural integrity of strong magnet lantern ring, and the external diameter of strong magnet lantern ring is less relatively, also can avoid it by the extrusion and the atress damage.
Preferably, the number of the strong magnet lantern rings in the screw hole is multiple and is uniformly distributed along the axial direction of the cushion pipe.
The strong magnet lantern ring is mainly used for forming a magnetic field, and the influence of vibration on the connection effect between the screw and the cushion pipe in the use process of the sand mold is reduced in a magnetic adsorption mode; the arrangement of the strong magnet lantern ring has a good offsetting effect on low-amplitude high-frequency vibration; the connection strength between the middle section of the screw rod and the screw hole can be enhanced.
Preferably, the corrugated spring can be formed by laminating and combining a plurality of annular corrugated spring sheets or an integrated corrugated spring subjected to 3D printing.
The corrugated spring has the effects that when the molten metal is cooled and releases heat to cause expansion of raw sand, deformation effects caused by structures such as gaskets are effectively absorbed, the influence on the structure of the screw rod is avoided, and the screw rod is prevented from being bent; is beneficial to demoulding after the part is formed.
Preferably, the bolt and the spacing pin are made of high speed steel with a low coefficient of thermal expansion.
The bolts and the limiting pins are made of high-speed steel materials, so that the stability of structural strength and properties can be kept to the maximum extent after heat is absorbed, the structural stability of the sand mold is maintained, and the defect rate of molded parts is reduced.
Preferably, the nut of the bolt is a standard hexagon nut, and an inner hexagon groove is further arranged at the top of the nut.
The nut is provided with an outer hexagonal structure and an inner hexagonal structure respectively, so that different tools can be used in the screwing process.
The invention has the following beneficial effects:
the sand mold can be suitable for casting aluminum alloy parts, and has the advantages of better structural stability, better heat resistance and outstanding earthquake resistance; therefore, the yield of part processing can be greatly improved, and the defect rate is reduced.
The upper sand box and the lower sand box of the sand mold are fixed by special screws, the upper end and the lower end of each screw are tightly combined with the screw holes through threads, the middle sections are deformed and locked in order to avoid thermal expansion and are not connected by the threads but are tightly contacted through unthreaded through rods, expandable gaskets are specially arranged in the screw holes in order to improve the strength of contact action of the through rod sections, and corrugated springs are further arranged in the gaskets and the screw holes to absorb acting force in the vibration and thermal expansion processes. In addition, a strong magnet lantern ring is arranged outside the gasket, and the impact effect in the vibration process is further counteracted through a magnetic field. Thereby avoiding sand box dislocation caused by impact in the sand filling, sand tightening and other processes of the sand mold and influencing the yield of parts.
In order to prevent the influence of the high temperature and heat of the molten aluminum alloy on the magnetism of the strong magnet, the invention also particularly selects the alnico permanent magnet with high Curie temperature.
The middle section of screw rod has set up special spacer pin, and the lateral force that the screw rod received can be born to the fibre round pin, prevents that the screw rod from receiving the extrusion and bending for the screw rod structure is more stable, is convenient for carry out sand box dismouting and part drawing of patterns.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of a double-flask sand mold in the present embodiment;
FIG. 2 is an exploded view of the bolt, spacer tube and limit pin arrangement of the present embodiment;
FIG. 3 is a schematic structural view of the drag flask and its dam plate and catching groove in this embodiment;
FIG. 4 is a magnetic field profile of the strong magnet collar and its surroundings in this embodiment;
labeled as: 1. a cope flask; 2. a drag flask; 3. a bolt; 4. a spacing pin; 5. a baffle plate; 6. a clamping groove; 30. a nut; 31. a screw; 32. necking down; 33. a nut; 41. a U-shaped groove; 51. a clamping part; 100. a pin hole; 101. a cushion pipe; 102. a wave spring; 103. a ferromagnetic lantern ring.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "top", "bottom", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; the connection can be mechanical connection or circuit connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.
A double-box sand mold for casting aluminum alloy parts comprises an upper sand box 1 and a lower sand box 2, wherein the upper sand box 1 and the lower sand box 2 are fixed through bolts 3, screw holes which penetrate through the upper part and the lower part are formed in the side walls of the upper sand box 1 and the lower sand box 2, and internal threads are formed in the upper half part of the upper sand box 1 and the lower half part of the lower sand box 2 in the screw holes; the lower half part of the upper sand box 1 and the upper half part of the lower sand box 2 are provided with unthreaded through holes, and the inner diameter of the unthreaded through hole section is larger than that of the threaded section; as shown in fig. 3, the outer walls of the through hole sections in the cope flask 1 and the drag flask 2 are provided with pin holes 100, the outside of the pin holes 100 is provided with a baffle plate 5 which can rotate along the outer wall of the sand mold, the cross section of the baffle plate 5 is 7-shaped, the front end is provided with a clamping part 51 which extends vertically and inwards, the right side of the baffle plate 5 is provided with a clamping groove 6 for fixing the baffle plate 5, and the opening of the clamping groove 6 is upward;
as shown in fig. 2 and 4, a strong magnet lantern ring 103 is arranged in the through hole section of the screw hole; the ferromagnetic lantern ring 103 is composed of a semi-annular N pole and a semi-annular S pole respectively; a cushion pipe 101 is arranged in the strong magnet lantern ring 103, and the cushion pipe 101 is formed by splicing a left part and a right part which are symmetrical along the axis; the upper end and the lower end of the cushion pipe 101 are provided with outward bending parts; the surface of the cushion pipe 101 is provided with a pin hole 100 corresponding to the outer walls of the cope flask 1 and the drag flask 2; a corrugated spring 102 is sleeved in a gap between the outer side of the cushion pipe 101 and the screw hole;
the upper section and the lower section of a screw rod 31 of the bolt 3 are provided with external threads matched with the internal threads in the screw hole, the surface of the middle section of the screw rod 31 is free of threads, and the middle section of the screw rod 31 is provided with two contracting necks 32 with gradually reduced diameters; the necking necks 32 are respectively positioned at the positions corresponding to the pin holes 100 in the cope flask 1 and the drag flask 2 after the screw rods 31 are installed;
the pin hole 100 is internally provided with a limit pin 4, the front end of the limit pin 4 is provided with a U-shaped groove 41, and the edge of the front end of the U-shaped groove 41 is provided with a chamfer matched with the shape of the necking down 32.
The top end of the bolt 3 is provided with a nut 30, the bottom end is regulated by a nut 33, the number of the nuts 33 connected with the bottom end is two, a buffer washer is arranged above the nut 33 positioned on the inner side, and the buffer washer is also arranged below the nut 30.
The double nuts 33 can generate self-locking effect in connection, so that the nut 33 is prevented from loosening due to self-rotation on the bolt; the gasket can absorb the acting force in the axial direction of the screw rod 31, and the anti-seismic effect of the sand mold is improved.
During this sand mould assembly, assemble cope flask 1 and drag flask 2, then screw in inserting the screw with bolt 3, the position of shrink neck 32 in bolt 3 is observed through pinhole 100 on cope flask 1 and the drag flask 2, treat that flexible neck 32 is in pinhole 100 department, insert spacer pin 4 in pinhole 100, chucking bolt 3, then rotate baffle 5 to pinhole 100 department again for the joint portion 51 of baffle 5 front end inserts in joint groove 6, at this moment, baffle 5 supports tight spacer pin 4. And finally, locking the bottom of the bolt 3 through a double nut 33.
When the sand mold is used, raw sand is filled into the sand box and is compacted through kneading, extruding, vibrating and other modes; then casting molten metal into the cavity; after the part is cooled and formed, the nut 33 below the bolt 3 is detached, then the baffle 5 is rotated and opened, the limiting pin 4 is pulled out, and finally the bolt 3 is screwed out.
The limiting pin 4 is inserted into the pin hole 100 to be tightly clamped with the bolt 3, and the baffle 5 rotates into the clamping groove 6 to be locked; the tail end of the limit pin 4 just abuts against the baffle 5. The limiting pin 4 is mainly used for fixing the bolt 3, so that the problem that the bolt 3 is self-rotated and loosened in the vibration process and moves along the axis is solved; the deformation of the middle section of the screw 31 perpendicular to the axial direction due to heat can be avoided, and the screw 31 is difficult to take out.
The strong magnet collar 103 is made of an alnico permanent magnet having a high curie temperature; as shown in fig. 2 and 4, the strong magnet collar 103 is sleeved outside the cushion tube 101, and is fixedly connected to the cushion tube through the elastic buffer, and the outer diameter of the strong magnet collar 103 is smaller than the outer diameter of the ripple spring 102.
The buffer piece has the function of preventing the cushion pipe 101 from deforming to influence the structural integrity of the strong magnet lantern ring 103, and the outer diameter of the strong magnet lantern ring 103 is relatively small, so that the strong magnet lantern ring can be prevented from being extruded to be damaged by force.
The number of the strong magnet lantern rings 103 in the screw hole is multiple and is evenly distributed along the axial direction of the cushion pipe 101.
The strong magnet lantern ring 103 is mainly used for forming a magnetic field, and the influence of the vibration effect on the connection effect between the screw 31 and the cushion pipe 101 in the sand mold use process is reduced in a magnetic adsorption mode; the arrangement of the strong magnet lantern ring 103 has a good offsetting effect on low-amplitude high-frequency vibration; the connection strength between the middle section of the screw rod 31 and the screw hole can be enhanced.
The corrugated spring 102 can be formed by laminating and combining a plurality of annular corrugated spring sheets or an integrated corrugated spring 102 subjected to 3D printing.
The corrugated spring 102 is used for effectively absorbing deformation caused by structures such as the gasket 101 and the like when raw sand expands due to heat release of molten metal during cooling, so that the structure of the screw 31 is prevented from being influenced, and the screw 31 is prevented from being bent; is beneficial to demoulding after the part is formed.
The bolt 3 and the stopper pin 4 are made of high-speed steel having a low thermal expansion coefficient.
The bolts 3 and the limiting pins 4 are made of high-speed steel materials, so that the stability of structural strength and properties can be kept to the maximum extent after heat is absorbed, the structural stability of the sand mold is maintained, and the defect rate of molded parts is reduced.
The nut 30 of the bolt 3 is a standard hexagonal nut, and the top of the nut 30 is also provided with an inner hexagonal groove.
The nut 30 is provided with an outer hexagonal structure and an inner hexagonal structure, respectively, so that different tools can be used during the screwing process.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a double-box sand mould for aluminium alloy parts casting, includes cope flask and drag flask, and cope flask and drag flask pass through the bolt fastening, its characterized in that: screw holes which penetrate through the upper sand box and the lower sand box from top to bottom are formed in the side walls of the upper sand box and the lower sand box, and internal threads are formed in the upper half part of the upper sand box and the lower half part of the lower sand box in the screw holes; the lower half part of the upper sand box and the upper half part of the lower sand box are non-threaded through holes, and the inner diameter of the non-threaded through hole section is larger than that of the threaded section; the outer walls of the through hole sections in the upper sand box and the lower sand box are provided with pin holes, the outer sides of the pin holes are provided with baffle plates which can rotate along the outer walls of the sand moulds, the cross sections of the baffle plates are in a 7 shape, the front ends of the baffle plates are provided with clamping parts which vertically extend inwards, the right sides of the baffle plates are provided with clamping grooves for fixing the baffle plates, and the openings of the clamping grooves are upward;
a strong magnet lantern ring is arranged in the through hole section of the screw hole; the strong magnet lantern ring is respectively composed of a semi-annular N pole and an S pole; a cushion pipe is arranged in the strong magnet lantern ring and is formed by splicing a left part and a right part which are symmetrical along the axis; the upper end and the lower end of the cushion pipe are provided with outward bending parts; the surface of the cushion pipe is provided with pin holes corresponding to the outer walls of the upper sand box and the lower sand box; a corrugated spring is sleeved in a gap between the outer side of the cushion pipe and the screw hole;
the upper section and the lower section of the screw rod of the bolt are provided with external threads matched with the internal threads in the screw hole, the surface of the middle section of the screw rod is free of threads, and the middle section of the screw rod is provided with two necking necks with gradually reduced diameters; the necking necks are respectively positioned at the corresponding positions of the pin holes in the upper sand box and the lower sand box after the screw rod is installed;
set up the spacer pin in the pinhole, the spacer pin front end sets up U type groove, and the edge of U type groove front end sets up and receives the shape assorted chamfer of necking down.
2. The double-box sand mold for casting the aluminum alloy parts according to claim 1, which is characterized in that: the top of bolt is equipped with the nut, and the bottom is fixed through the nut, the nut quantity that the bottom is connected is two, is located inboard nut top and is equipped with the cushion washer, and wherein, the nut below also sets up the cushion washer.
3. The double-box sand mold for casting the aluminum alloy parts according to claim 1, which is characterized in that: the limiting pin is inserted into the pin hole to be tightly clamped with the bolt, and after the baffle rotates into the clamping groove to be locked, the tail end of the limiting pin just abuts against the baffle.
4. The double-box sand mold for casting the aluminum alloy parts according to claim 1, which is characterized in that: the strong magnet lantern ring is prepared from an alnico permanent magnet with a high Curie temperature; the strong magnet lantern ring is sleeved outside the cushion pipe and fixedly connected with the cushion pipe through the elastic buffer piece, and the outer diameter of the strong magnet lantern ring is smaller than that of the corrugated spring.
5. The double-box sand mold for casting the aluminum alloy parts according to claim 1, which is characterized in that: the number of strong magnet lantern rings in the screw is a plurality of, along the bushing axial evenly distributed.
6. The double-box sand mold for casting the aluminum alloy parts according to claim 1, which is characterized in that: the corrugated spring can be formed by laminating and combining a plurality of annular corrugated spring pieces or an integrated corrugated spring printed by 3D.
7. The double-box sand mold for casting the aluminum alloy parts according to claim 1, which is characterized in that: the bolt and the limiting pin are made of high-speed steel with low thermal expansion coefficient.
8. The double-box sand mold for casting the aluminum alloy parts according to claim 1, which is characterized in that: the nut of bolt is standard hexagon nut, and the nut top still sets up interior hexagonal groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910391919.0A CN110064738B (en) | 2019-05-13 | 2019-05-13 | Double-box sand mold for casting aluminum alloy parts |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910391919.0A CN110064738B (en) | 2019-05-13 | 2019-05-13 | Double-box sand mold for casting aluminum alloy parts |
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| CN110064738A CN110064738A (en) | 2019-07-30 |
| CN110064738B true CN110064738B (en) | 2020-12-22 |
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| CN114210923A (en) * | 2021-12-07 | 2022-03-22 | 青岛连山铸造有限公司 | Novel coupler mold integrating coupler body and coupler knuckle and using method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD229352A1 (en) * | 1984-12-04 | 1985-11-06 | Bauakademie Ddr | SCREW CONNECTION FOR SCARVES TRIMS |
| JPS62234642A (en) * | 1986-04-03 | 1987-10-14 | Komatsu Ltd | Mold clamping jig for pattern flask |
| US7150310B2 (en) * | 2004-08-31 | 2006-12-19 | Hunter Automated Machinery Corporation | Automated clamping mechanism and mold flask incorporating same |
| CN203725720U (en) * | 2013-12-30 | 2014-07-23 | 十堰市泰祥实业有限公司 | Special locking device for iron mold sand coating molding |
| CN204321116U (en) * | 2014-05-26 | 2015-05-13 | 哈尔滨电机厂有限责任公司 | Casting sand box locking device |
| CN205551415U (en) * | 2016-02-19 | 2016-09-07 | 昆山精铝精密铸造有限公司 | Foundry sand box |
| CN106694823A (en) * | 2017-02-28 | 2017-05-24 | 佛山市恒学科技服务有限公司 | Precoated sand casting sand type compressing device |
| CN107626900A (en) * | 2017-08-22 | 2018-01-26 | 湖州市下昂多联铸造有限公司 | A kind of casting box fixing device of molding sand compression apparatus |
| CN107932697A (en) * | 2017-12-15 | 2018-04-20 | 周兆弟 | A kind of die bolt |
| CN207900182U (en) * | 2017-12-29 | 2018-09-25 | 江阴新长机械配件有限公司 | A kind of sandbox being provided with the double pressure head clamp assemblies of die joint flange |
| CN208825492U (en) * | 2018-10-14 | 2019-05-07 | 周口师范学院 | A kind of sandbox convenient for positioning with fixing |
| CN109226695A (en) * | 2018-11-19 | 2019-01-18 | 江苏中科纽克生态科技有限公司 | A kind of moulding machine sandbox import connection sealing structure |
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