CN101912949A - Heavy wheel cast bottom mold making core supporting disc, device and process - Google Patents
Heavy wheel cast bottom mold making core supporting disc, device and process Download PDFInfo
- Publication number
- CN101912949A CN101912949A CN 201010180629 CN201010180629A CN101912949A CN 101912949 A CN101912949 A CN 101912949A CN 201010180629 CN201010180629 CN 201010180629 CN 201010180629 A CN201010180629 A CN 201010180629A CN 101912949 A CN101912949 A CN 101912949A
- Authority
- CN
- China
- Prior art keywords
- core supporting
- supporting disc
- hole
- sandbox
- die bed
- 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.)
- Pending
Links
Images
Landscapes
- Casting Devices For Molds (AREA)
Abstract
The invention discloses a heavy wheel cast bottom mold making core supporting disc, a heavy wheel cast bottom mold making device and a heavy wheel cast bottom mold making process. The core supporting disc comprises a lifting rod body and a disc body, which are perpendicular to each other, wherein the lifting rod body is a cone with a thin top and thick bottom; the lower end of the lifting rod body is connected with the middle part of the disc body into a whole; and the upper part of the lifting rod body is provided with a transverse through hole. The device has a sand box, a bottom basin, a mold frame, a mold lifting plate and the core supporting disc, wherein a deboss matched with the disc body is formed in the middle of the inside surface of the bottom part of the bottom basin; the disc body is arranged in the deboss; and the upper part of the cylindrical surface of the sand box is provided with two opposite notches which are as high as the through hole in the upper part of the lifting rod. The device also has a wedge rod of which the length is greater than the diameter of the sand box. The process is to make a sand mold by using the core supporting disc and the mold making device. The disc, the device and the process can improve the rate of finished bottom mold considerably, meet needs of production lines and meet needs for batch and mechanical production of large-sized castings.
Description
One, technical field
The present invention relates to a kind of heavy wheel cast moulding field, particularly relate to a kind of heavy wheel cast die bed moulding core supporting disc and styling apparatus and technology.
Two, background technology
The spheroidal graphite cast-iron truck wheel that my company produces, it is one of vital part of automotive axle, its mechanical performance and serviceability have high requirement, this foundry goods single-piece weight reaches 60-90kg, maximum gauge reaches 500mm, highly reach more than the 300mm, and their dimensional tolerance of casting must guarantee below the CT9 level that this just requires us is that formative technology or pouring technology all will go research in earnest, inquire into for this foundry goods.In the past, the formative technology of this product is based on clay-bonded sand wet type hand moulding, and concrete formative method is as follows:
(1), die bed moulding
To hang down basin apperance mouth up, will hang down case and be positioned over mouth along last; The moulder with spade with molding sand shovel under casing, divide three times with the whole die bed reality of pounding with hammer flattener; Two people make a concerted effort die bed 180.Upset is lifted end basin then with joint efforts, carries out next die bed moulding.
(2), mo(u)ld top half moulding
The mo(u)ld top half moulding is carried out on semi-automatic moulding machine, because the mo(u)ld top half structure is tall and big, so adopt two-part mo(u)lding method up and down.At first drag box is positioned over the system of pounding on the moulding machine on request, sprinkles tap sand, place the cope system of pounding again, rotate the moulding machine hand wheel, apperance is fallen, two people make a concerted effort to lift upper and lower sandbox successively.At last, carry out series of process such as mould assembling, cast by technological requirement.
In the operating process of this technology, the 80kg because end basin weighs certainly can be very painstaking when lifting the under casing molding, useful slightly force unbalance, will cause the bed load type to damage, cause foundry goods to be scrapped, this just requires the operator should have certain technology also certain strength will be arranged.In addition, produce in this way, a series of shortcomings such as it is low to have a casting dimension accuracy, and surface quality is poor, and production efficiency is low, and labour intensity is big,
Along with company constantly develops, the market demand is vigorous, and the order of this product is more and more, and such hand moulding obviously can not satisfy our production demand, and the reform formative technology is extremely urgent.Though multiple advanced person's electromechanical integration, the automatic production line of computer control systems are arranged at present, as: high-pressure molding line, gas are towards mo(u)lding line, static pressure mo(u)lding line etc., these mo(u)lding lines all belong to modern formative technology, all being fit to production big in batches, that precision is high uses, but, because its technical conditions requires height, costs an arm and a leg, and a lot of enterprises are hung back.
Through we technical staff's hard effort, research and development are from having made the foundry production line of producing large-scale wheel product, and this production line uses the pneumatic shockless jolt molding machine of 148A of machine casting factory, Baoding, Hebei province production, and self-control has designed the die bed repaking mechanism.The application of this production line will improve the Casting Shop Mechanization degree effectively, increase work efficiency, and alleviate labor strength.
Yet, in the process of trial-production operation, have a problem that is difficult to get rid of perplexing our technical staff author always.Because the die bed molding belongs to and hangs the type molding, and the diameter of bed load type reaches 500mm, highly reaches 300mm, about weight 300kg, if do not take certain technical measures, die bed is basic just can't molding.Even molding reluctantly, because sand mold mainly leans on sandbox and sand mold top adhesion to support the weight of whole sand mold, and most of sand mold is arranged in end basin, and this adhesion also is not enough to the weight of a whole sand mold, and top is also as easy as rolling off a log because vibrations cause the sand mold slump.Cause bed load type yield rate low, can't satisfy the production line needs, make suchlike heavy castings can't realize the mechanization operation.
Three, summary of the invention
The objective of the invention is in order to address the above problem, a kind of heavy wheel cast die bed moulding core supporting disc and styling apparatus and technology are provided, thereby can significantly improve the yield rate of die bed, can satisfy the needs of production line, be fit to the needs that heavy castings are in enormous quantities, mechanization is produced fully.
Technical scheme of the present invention is: a kind of heavy wheel cast die bed moulding core supporting disc, and this core supporting disc contains mutually perpendicular lifting body and disk body, and described lifting body is up-thin-low-thick cone, and described lifting body lower end and disk body middle part are connected in one; The top of described lifting body is provided with transverse through hole.
The upper surface of described disk body is provided with cast channel forming piece in outer rim inside, described through hole is a rectangular through holes.
Described through hole internal upper part is equipped with the rolling sleeve mechanism.
A kind of heavy wheel cast die bed styling apparatus, contain sandbox, end basin, mould bases, lifting plate, basin of the described end is fixedly mounted in the mould bases, described lifting plate is sleeved on outside the end basin and places on the mould bases, be provided with corresponding pin-and-hole between the lower edge of described sandbox, the upper edge of mould bases and the lifting plate, be provided with the alignment pin of coupling in the pin-and-hole, in the basin of the described end core supporting disc is installed also, this core supporting disc contains mutually perpendicular lifting body and disk body, described lifting body is up-thin-low-thick cone, and described lifting body lower end and disk body middle part are connected in one; The top of described lifting body is provided with transverse through hole; Basin bottom part inner surface center, the described end is provided with the depression with described disk body coupling, and disk body is installed in this depression, and the top, the face of cylinder of described sandbox is provided with two relative breach, and the through hole on this breach and described shadoof top is in sustained height; This device also contains the tapered shaft of a length greater than the sandbox diameter.
The degree of depth of described two breach small one and large one, be the inclined-plane below two breach and be on the same inclined-plane, the angle of this inclined-plane gradient and tapered shaft is complementary.
The upper surface of described disk body is provided with cast channel forming piece in outer rim inside, described through hole is a rectangular through holes.
Described through hole internal upper part is equipped with the rolling sleeve mechanism.
A kind of heavy wheel cast die bed formative technology is characterized in that:
1., end basin is fixedly mounted in the mould bases,
2., the disk body of core supporting disc is installed in the depression of end basin,
3., that lifting plate is sleeved on end basin is outer and place on the mould bases, and sandbox is placed lifting plate top, makes the nib correspondence of the chucking lug of mould bases upper edge, lifting plate, sandbox by the alignment pin adjustment, and with the alignment pin location,
5., knockout, ram-jolt,
6., tapered shaft inserted the breach on sandbox top and passes the through hole on core supporting disc top, and wear consolidation,
7., whereabouts mould bases and end basin, stripper pin jack-up lifting plate simultaneously, lifting plate holds up sandbox, sandbox holds up tapered shaft, tapered shaft drives core supporting disc and moves upward, and takes out the die bed sand mold.
The 7. after the step with 180 ° of placements of die bed sand mold upset, take out tapered shaft, take out core supporting disc again
Beneficial effect of the present invention
1, die bed yield rate height, maintenance easy to use is simple.
Held up the bottom of sand mold by core supporting disc, and installed tapered shaft additional core supporting disc and sand mold are fixed as one, made whole sand mold more firm, can tackle the various vibrations in the course of work, compared with original hand moulding and raise the efficiency 50%.And the percent defective that makes foundry goods is reduced to present 7% by original 20%.Moulding workman's work situation has had significantly improvement, has tangible economic benefit.
2, the efficient height, can satisfy the production line needs, be fit to that heavy castings are in enormous quantities, mechanization,
Adopt this heavy wheel cast die bed moulding with core supporting disc and styling apparatus and technology, resemble the such heavy castings of truck wheel, use the method for hand moulding very general at China's foundry enterprise, the moulding mechanization degree is on the low side.The success of the development and Application of this core supporting disc technology has broken away from that the hand moulding yield rate is low for a long time, and efficient is low, and has improved product quality and efficiency to a great extent, has very big social benefit.
3, improve working environment
This device is easy to make, and uses simply, easy to maintenance, meets the national green operating environment that people-oriented, has effectively improved moulding workman's working condition and operating condition, is subjected to foundry and moulding workman's welcome deeply, very worthly applies at casting industry.
4,, can fully reduce when inserting tapered shaft the radial frictional force of core supporting disc lifting body is brought influence thereby avoid the core supporting disc lifting body to produce to move radially to the die bed quality by in the through hole of core supporting disc top, the rolling sleeve mechanism being set.
Four, description of drawings
Fig. 1 faces one of complete section structural representation for core supporting disc
Fig. 2 is the vertical view of Fig. 1 or Fig. 3
Fig. 3 faces two of complete section structural representation for core supporting disc
Fig. 4 is the local structure for amplifying schematic diagram of the I portion of Fig. 3
Fig. 5 is the side-looking structural representation of heavy wheel cast die bed styling apparatus
Fig. 6 is the opposite side TV structure schematic diagram of heavy wheel cast die bed styling apparatus
Fig. 7 faces structural representation for the lifting plate of heavy wheel cast die bed styling apparatus
Fig. 8 is the lifting plate complete section structural representation of heavy wheel cast die bed styling apparatus
Fig. 9 is the end basin complete section structural representation of heavy wheel cast die bed styling apparatus
Figure 10 is the plan structure schematic diagram of Fig. 9
Figure 11 is the sandbox structural representation of heavy wheel cast die bed styling apparatus
Five, the specific embodiment
Referring to Fig. 1-Figure 10,1. core supporting discs among the figure, 2. tapered shaft, 3. sandbox, 4. lifting plate, 5. mould bases, 6, end basin, 7. alignment pin, the wherein depression of basin bottom part at the bottom of the pin-and-hole of the chucking lug of 1-1. lifting body, 1-2. disk body, 1-3. cast channel forming piece, 1-4. through hole, 1-5. rolling sleeve mechanism, 3-1. sandbox, 3-2 breach, 3-3 breach, 4-1. lifting plate, 4-2. lifting plate mesopore, the 6-1..
Embodiment one: referring to Fig. 1, Fig. 2, a kind of heavy wheel cast die bed moulding core supporting disc among the figure, this core supporting disc contains mutually perpendicular lifting body 1-1 and disk body 1-2, and described lifting body 1-1 is up-thin-low-thick cone, and described lifting body 1-1 lower end and disk body 1-2 middle part are connected in one; The top of described lifting body 1-1 is provided with transverse through hole 1-4.The upper surface of described disk body 1-2 is provided with cast channel forming piece 1-3 in outer rim inside.
Embodiment two: referring to Fig. 3, Fig. 2, Fig. 4, a kind of heavy wheel cast die bed moulding core supporting disc, this core supporting disc contains mutually perpendicular lifting body 1-1 and disk body 1-2, described lifting body 1-1 is up-thin-low-thick cone, and described lifting body 1-1 lower end and disk body 1-2 middle part are connected in one; The top of described lifting body 1-1 is provided with transverse through hole 1-4.The upper surface of described disk body 1-2 is provided with cast channel forming piece 1-3 in outer rim inside.Rolling sleeve mechanism 1-5 is installed above the described through hole 1-4.
Embodiment three: referring to Fig. 1, Fig. 2, Fig. 5-Figure 10, a kind of heavy wheel cast die bed styling apparatus, contain sandbox, end basin, mould bases, lifting plate, basin of the described end is fixedly mounted in the mould bases, described lifting plate is sleeved on outside the end basin and places on the mould bases, the lower edge of described sandbox, be provided with corresponding pin-and-hole between the upper edge of mould bases and the lifting plate, be provided with the alignment pin of coupling in the pin-and-hole, in the basin of the described end core supporting disc is installed also, this core supporting disc contains mutually perpendicular lifting body and disk body, described lifting body is up-thin-low-thick cone, and described lifting body lower end and disk body middle part are connected in one; The top of described lifting body is provided with transverse through hole; Basin bottom part inner surface center, the described end is provided with the depression with described disk body coupling, and disk body is installed in this depression, and the top, the face of cylinder of described sandbox is provided with two relative breach, and the through hole on this breach and described shadoof top is in sustained height; This device also contains the tapered shaft of a length greater than the sandbox diameter.The degree of depth of described two breach small one and large one, be the inclined-plane below two breach and be on the same inclined-plane, the angle of this inclined-plane gradient and tapered shaft is complementary.Can guarantee that like this it is vertically upward to the active force of lifting body that tapered shaft is inserted its upper surface of back, that is to say it is that centerline direction with lifting body is identical.The upper surface of described disk body is provided with cast channel forming piece in outer rim inside, described through hole is a rectangular through holes.
Embodiment four: referring to Fig. 3, Fig. 2, Fig. 4, Fig. 5-Figure 10, a kind of heavy wheel cast die bed styling apparatus, contain sandbox, end basin, mould bases, lifting plate, basin of the described end is fixedly mounted in the mould bases, described lifting plate is sleeved on outside the end basin and places on the mould bases, the lower edge of described sandbox, be provided with corresponding pin-and-hole between the upper edge of mould bases and the lifting plate, be provided with the alignment pin of coupling in the pin-and-hole, in the basin of the described end core supporting disc is installed also, this core supporting disc contains mutually perpendicular lifting body and disk body, described lifting body is up-thin-low-thick cone, and described lifting body lower end and disk body middle part are connected in one; The top of described lifting body is provided with transverse through hole; Basin bottom part inner surface center, the described end is provided with the depression with described disk body coupling, and disk body is installed in this depression, and the top, the face of cylinder of described sandbox is provided with two relative breach, and the through hole on this breach and described shadoof top is in sustained height; This device also contains the tapered shaft of a length greater than the sandbox diameter.The degree of depth of described two breach small one and large one, be the inclined-plane below two breach and be on the same inclined-plane, the angle of this inclined-plane gradient and tapered shaft is complementary.Can guarantee that like this it is vertically upward to the active force of lifting body that tapered shaft is inserted its upper surface of back, that is to say it is that centerline direction with lifting body is identical.The upper surface of described disk body is provided with cast channel forming piece in outer rim inside, described through hole is a rectangular through holes.Described through hole internal upper part is equipped with the rolling sleeve mechanism.
Embodiment five: a kind of heavy wheel cast die bed formative technology is characterized in that:
1., end basin is fixedly mounted in the mould bases,
2., the disk body of core supporting disc is installed in the depression of end basin,
3., that lifting plate is sleeved on end basin is outer and place on the mould bases, and sandbox is placed lifting plate top, makes the nib correspondence of the chucking lug of mould bases upper edge, lifting plate, sandbox by the alignment pin adjustment, and with the alignment pin location,
5., knockout, ram-jolt,
6., tapered shaft inserted the breach on sandbox top and passes the through hole on core supporting disc top, and wear consolidation,
7., whereabouts mould bases and end basin, stripper pin jack-up lifting plate simultaneously, lifting plate holds up sandbox, sandbox holds up tapered shaft, tapered shaft drives core supporting disc and moves upward, and takes out the die bed sand mold.
The 7. after the step with 180 ° of placements of die bed sand mold upset, take out tapered shaft, take out core supporting disc again.
Claims (9)
1. heavy wheel cast die bed moulding core supporting disc, it is characterized in that: this core supporting disc contains mutually perpendicular lifting body and disk body, and described lifting body is up-thin-low-thick cone, and described lifting body lower end and disk body middle part are connected in one; The top of described lifting body is provided with transverse through hole.
2. heavy wheel cast die bed moulding core supporting disc according to claim 1 is characterized in that: the upper surface of described disk body is provided with cast channel forming piece in outer rim inside, described through hole is a rectangular through holes.
3. heavy wheel cast die bed moulding core supporting disc according to claim 2, it is characterized in that: described through hole internal upper part is equipped with the rolling sleeve mechanism.
4. heavy wheel cast die bed styling apparatus, contain sandbox, end basin, mould bases, lifting plate, basin of the described end is fixedly mounted in the mould bases, described lifting plate is sleeved on outside the end basin and places on the mould bases, the lower edge of described sandbox, be provided with corresponding pin-and-hole between the upper edge of mould bases and the lifting plate, be provided with the alignment pin of coupling in the pin-and-hole, it is characterized in that: in the basin of the described end core supporting disc is installed also, this core supporting disc contains mutually perpendicular lifting body and disk body, described lifting body is up-thin-low-thick cone, and described lifting body lower end and disk body middle part are connected in one; The top of described lifting body is provided with transverse through hole; Basin bottom part inner surface center, the described end is provided with the depression with described disk body coupling, and disk body is installed in this depression, and the top, the face of cylinder of described sandbox is provided with two relative breach, and the through hole on this breach and described shadoof top is in sustained height; This device also contains the tapered shaft of a length greater than the sandbox diameter.
5. heavy wheel cast die bed styling apparatus according to claim 4 is characterized in that: the degree of depth of described two breach small one and large one, be the inclined-plane below two breach and be on the same inclined-plane, the angle of this inclined-plane gradient and tapered shaft is complementary.
6. heavy wheel cast die bed moulding core supporting disc according to claim 4 is characterized in that: the upper surface of described disk body is provided with cast channel forming piece in outer rim inside, described through hole is a rectangular through holes.
7. heavy wheel cast die bed moulding core supporting disc according to claim 6, it is characterized in that: described through hole internal upper part is equipped with the rolling sleeve mechanism.
8. heavy wheel cast die bed formative technology is characterized in that:
1., end basin is fixedly mounted in the mould bases,
2., the disk body of core supporting disc is installed in the depression of end basin,
3., that lifting plate is sleeved on end basin is outer and place on the mould bases, and sandbox is placed lifting plate top, makes the nib correspondence of the chucking lug of mould bases upper edge, lifting plate, sandbox by the alignment pin adjustment, and with the alignment pin location,
5., knockout, ram-jolt,
6., tapered shaft inserted the breach on sandbox top and passes the through hole on core supporting disc top, and wear consolidation,
7., whereabouts mould bases and end basin, stripper pin jack-up lifting plate simultaneously, lifting plate holds up sandbox, sandbox holds up tapered shaft, tapered shaft drives core supporting disc and moves upward, and takes out the die bed sand mold.
9. heavy wheel cast die bed formative technology according to claim 8 is characterized in that: the 7. after the step with 180 ° of placements of die bed sand mold upset, take out tapered shaft, take out core supporting disc again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010180629 CN101912949A (en) | 2010-05-24 | 2010-05-24 | Heavy wheel cast bottom mold making core supporting disc, device and process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010180629 CN101912949A (en) | 2010-05-24 | 2010-05-24 | Heavy wheel cast bottom mold making core supporting disc, device and process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101912949A true CN101912949A (en) | 2010-12-15 |
Family
ID=43320668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010180629 Pending CN101912949A (en) | 2010-05-24 | 2010-05-24 | Heavy wheel cast bottom mold making core supporting disc, device and process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101912949A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4487456A (en) * | 1980-01-30 | 1984-12-11 | Swiss Aluminium Ltd. | Wheel disc cast in situ with interlocking rim |
| CN2918005Y (en) * | 2006-04-05 | 2007-07-04 | 臧日政 | Mobile microseism squeeze moulding machine |
| CN101444838A (en) * | 2008-12-19 | 2009-06-03 | 沪东重机有限公司 | Method for casting large jigger wheel with counterbalance |
| CN201283414Y (en) * | 2008-10-24 | 2009-08-05 | 山西汤荣汽车配件制造集团有限公司 | Sand jack and die lifter for mechanical molding of sand core |
| CN201446211U (en) * | 2009-06-29 | 2010-05-05 | 山东隆基机械股份有限公司 | Mold for manufacturing sand mold of heavy-duty car brake hub |
| CN201669376U (en) * | 2010-05-24 | 2010-12-15 | 河南省汤阴县华兴机械制造有限公司 | Stooling plate for heavy type wheel casting bottom model modeling and modeling device thereof |
-
2010
- 2010-05-24 CN CN 201010180629 patent/CN101912949A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4487456A (en) * | 1980-01-30 | 1984-12-11 | Swiss Aluminium Ltd. | Wheel disc cast in situ with interlocking rim |
| CN2918005Y (en) * | 2006-04-05 | 2007-07-04 | 臧日政 | Mobile microseism squeeze moulding machine |
| CN201283414Y (en) * | 2008-10-24 | 2009-08-05 | 山西汤荣汽车配件制造集团有限公司 | Sand jack and die lifter for mechanical molding of sand core |
| CN101444838A (en) * | 2008-12-19 | 2009-06-03 | 沪东重机有限公司 | Method for casting large jigger wheel with counterbalance |
| CN201446211U (en) * | 2009-06-29 | 2010-05-05 | 山东隆基机械股份有限公司 | Mold for manufacturing sand mold of heavy-duty car brake hub |
| CN201669376U (en) * | 2010-05-24 | 2010-12-15 | 河南省汤阴县华兴机械制造有限公司 | Stooling plate for heavy type wheel casting bottom model modeling and modeling device thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208879600U (en) | A kind of superhigh intensity steel automotive hub multiple station die forging mould | |
| CN203187290U (en) | Balance hoisting tool for overturning sand box | |
| CN201669376U (en) | Stooling plate for heavy type wheel casting bottom model modeling and modeling device thereof | |
| CN104907507A (en) | Moulding machine | |
| CN110963441A (en) | Lifting device for die machining | |
| CN201841240U (en) | Dead head top exhaust device of sand-prevention air hole | |
| CN101912949A (en) | Heavy wheel cast bottom mold making core supporting disc, device and process | |
| CN203578670U (en) | Ceramic regeneration pan of self-hardening sand regenerator | |
| CN203109172U (en) | Improved forming casting die for valve body castings | |
| CN205183713U (en) | Seiko casting quench sand box | |
| CN204770514U (en) | Molding machine add sand device | |
| CN203751289U (en) | Steel ball core-making casting machine | |
| CN206316342U (en) | The full-automatic sand casting moulding machine mould installion shaping plate structure of sand is penetrated up and down | |
| CN210648394U (en) | Automobile wheel hub molding machine double-compaction mechanism | |
| CN205147243U (en) | Wheel hub cold core mould | |
| CN203900401U (en) | Special pressing head of molding machine for feeding and molding brake drum on automatic molding production line | |
| CN203778710U (en) | Water tower type large sand box for casting | |
| CN201275599Y (en) | Support saddle for overturning casting sand jack | |
| CN204711121U (en) | A kind of shaking device of moulding machine | |
| CN203900400U (en) | Special pressure head for moulding machine for lower shape moulding of brake drum on automatic moulding production line | |
| CN205270775U (en) | As cast molding device of molding sand | |
| CN212917544U (en) | A plain bumper for self-hardening sand molding production line | |
| CN201751143U (en) | Drying cylinder cover molding machine | |
| CN203109177U (en) | Single simple molding machine | |
| CN214720333U (en) | Structure for preventing heightening of lower core ejecting rod of casting core box |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20101215 |