CN101214529B - Non-model sand mold fast manufacturing technique - Google Patents
Non-model sand mold fast manufacturing technique Download PDFInfo
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- CN101214529B CN101214529B CN2007100330340A CN200710033034A CN101214529B CN 101214529 B CN101214529 B CN 101214529B CN 2007100330340 A CN2007100330340 A CN 2007100330340A CN 200710033034 A CN200710033034 A CN 200710033034A CN 101214529 B CN101214529 B CN 101214529B
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- Prior art keywords
- sand
- resin
- sand mold
- layer
- mold
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- 239000004576 sand Substances 0.000 title claims abstract description 102
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title abstract description 5
- 239000011347 resin Substances 0.000 claims abstract description 58
- 229920005989 resin Polymers 0.000 claims abstract description 58
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 29
- 239000000853 adhesive Substances 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 abstract 1
- 230000003472 neutralizing effect Effects 0.000 abstract 1
- 239000011230 binding agent Substances 0.000 description 15
- 238000005266 casting Methods 0.000 description 8
- 239000000243 solution Substances 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical compound C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 2
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- -1 class of phenolic aldehyde Chemical class 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002240 furans Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000009666 routine test Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
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Abstract
The invention discloses a novel sand-free type fast manufacture technique which is essentially characterized in that the invention mixes a dried sand, a resin and a firming agent uniformly into a resin sand and carries through bedded accumulating when the resin sand is still in a relax state and applies a neutralizing agent on the position besides a profile of the dried sand on each layer of paved resin sand when carrying through bedded accumulating to lead the resin sand of the position to keep the relax state; removes the relax resin sand to acquire the sand mold after the bedded accumulating is finished and the resin sand is solidified to reach a certain intensity. As the invention has already mixed the resin and the firming agent uniformly into the sand before carrying through bedded accumulating, the resin and firming agent inside the sand mold manufactured are distributed very uniformly; thereby solving various problems brought by the uneven distribution of an adhesive inside the sand mold in the prior art.
Description
Technical field
The present invention relates to non-mould moulding process, particularly the sand grains layer is become the non-model sand mold quick manufacturing process of sand mold.
Background technology
The basic skills of non-model sand mold quick manufacturing process is with the sand grains layer, and each layer sand grains relies on resin and curing agent to bond together the formation sand mold.In the prior art, the applying method of resin and curing agent mainly contains two kinds, and a kind of is on every layer of dry sand of completing, with mode sprayed resin and curing agent successively within the sand mold profile of scanning; Another kind is after earlier resin and dry sand being mixed, to spray curing agent with the mode that scans within the sand mold profile again on every layer of sand grains of completing.Because resin and (or) track while scan of curing agent (following general designation binding agent) is line strip, so skewness of binding agent, the amount of binding agent is maximum on scan line, and excessive, and the binding agent between the scan line then is that the diffusion by the binding agent on the scan line obtains.So just bring following problem: 1, the intensity between the sand mold inner scanning line a little less than, the bulk strength of sand mold is difficult to improve; 2, as improving the intensity between the sand mold inner scanning line, the binding agent consumption on the scan line will be more, and total binding agent consumption will increase; If 3 with the sand mold made as casting mold, the excessive binder on the scan line in the sand mold will cause the burning problem, reduces mould strength on the contrary, the cast back influences casting quality; If 4 increase the binding agent consumption in order to improve sand mold intensity, so when sand mold is used as casting mold, not only burning problem is more serious, and because the increase of binding agent total amount, cause the gas forming amount in casting process to strengthen, more seriously influence casting quality, and owing to the gas that is discharged is that bad air is unfavorable for environmental protection.
Summary of the invention
The purpose of this invention is to provide a kind of non-model sand mold quick manufacturing process, the problem that the sand mold internal bond agent skewness made from solution brings.
For this reason, non-model sand mold quick manufacturing process of the present invention, with the dry sand layer, and each layer sand grains bonding is formed sand mold with resin and curing agent, especially, before carrying out layer, with dry sand, resin and curing agent are uniformly mixed into resin sand, still be at resin sand and carry out layer in the loose condition (of surface), when carrying out layer, on every layer of resin sand of completing, position outside the sand mold profile applies nertralizer, make the resin sand of described position keep loose condition (of surface), treat that layer is finished and resin sand solidify reach certain intensity after, remove loose resin sand and obtain required sand mold.Because the present invention just evenly was blended in resin and curing agent in the dry sand before carrying out layer, so its inner resin of the sand mold of making and curing agent distribute very evenly, thereby solved the variety of issue that prior art sand mold internal bond agent skewness brings.
Advantage of the present invention is: the sand mold internal bond agent that 1, makes is evenly distributed, and can significantly improve the sand mold bulk strength; 2, need not to come the charity binding agent, so total binding agent consumption is reduced by the diffusion of the excessive binding agent in part; 3, owing to there is not the local excessive problem of binding agent, and under the prerequisite that does not increase the binding agent consumption, can significantly improve sand mold intensity, so the sand mold that makes can satisfy the requirement as casting mold well, can stop the big problem of burning and gas forming amount, help guaranteeing casting quality, and help environmental protection.
Description of drawings
Fig. 1 is that nertralizer applies position view on the resin sand of completing.
The specific embodiment
Implementation step of the present invention is the same substantially with existing non-model sand mold quick manufacturing process, also be the outline data that obtains each layer cross section of sand mold earlier by computer, according to lift height sand grains successively be stacked into a 3D solid by computer control non-model sand mold manufacturing equipment again.Innovative point of the present invention is, before carrying out layer, at first with dry sand, resin and curing agent are mixed into uniform resin sand, before the glue connection reaction of resin and curing agent is not also finished, just when resin sand still is in loose condition (of surface), with the non-model sand mold manufacturing equipment resin sand is carried out layer immediately, in banking process, on every layer of resin sand of completing, outside the profile of sand mold, apply nertralizer, for example on the resin sand 1 that one deck shown in Figure 1 has been completed, the zone of the ruling that knits a net between two concentric circles belongs to the zone outside the sand mold profile, just need to apply the zone of nertralizer, other white space belongs to the zone within the sand mold profile, just constitutes the zone of sand mold entity part.Applying of nertralizer can be by the outline data of computer according to each layer cross section of sand mold, and the injector head of control non-model sand mold manufacturing equipment sprays with scan mode to be finished, and track while scan can be a grid-shaped as shown in the figure.Normally, the non-model sand mold manufacturing equipment also can carry out one time compaction actions at every turn after completing one deck sand, and the present invention sprays nertralizer after being preferably in the resin sand compacting at once, and neutralization can be relatively good like this.The scanning line width of injector head should be adjusted according to the diffusion of nertralizer, guarantees that nertralizer can not be diffused in the sand mold profile.After the resin sand accumulation of all layers is finished, continue the glue connection reaction of wait resin and curing agent and all finishes or finish substantially.After resin sand curing reaches certain intensity, remove loose resin sand and just can obtain required sand mold, for example successively pile up curing with figure shown in Figure 1, and just can obtain a sand mold that has the hollow cylinder die cavity after removing loose resin sand, this sand mold as casting mold, just can be obtained the pipe of a thin wall shape toward the interior pouring molten iron of hollow cylinder die cavity.
Resin of the present invention and curing agent (curing agent claims catalyst again) can adopt and the identical type of existing non-model sand mold quick manufacturing process.For example Chang Yong resin comprises furane resins, PEPSET resin etc., and curing agent commonly used comprises p-methyl benzenesulfonic acid etc.Resin and curing agent account for the heavy ratio of sand can be determined by routine test, should reduce the consumption of resin and curing agent under the prerequisite that satisfies the sand mold requirement of strength as far as possible, for example furane resins account for sand heavy 1.5～2%, curing agent accounts for 25～40% of weight resin.Nertralizer of the present invention plays the effect that stops resin sand to solidify.The type of nertralizer is decided according to used resinous type, for example, the resin that solidifies with acid curing agent for this class of furane resins, can adopt alkaline solutions such as sodium hydroxide solution, potassium hydroxide solution as nertralizer, the weight percent concentration of solution can adopt 0.05～0.2%, the resin that solidifies with alkaline curing agent for this class of phenolic aldehyde urethane resin, can adopt acid solutions such as p-methyl benzenesulfonic acid solution, phosphoric acid solution as nertralizer, the weight percent concentration of solution can adopt 0.05～0.2%.
Claims (1)
1. non-model sand mold quick manufacturing process, with the dry sand layer, with resin and curing agent each layer sand grains bonding is formed sand mold, it is characterized in that: before carrying out layer, with dry sand, resin and curing agent are uniformly mixed into resin sand, still be at resin sand and carry out layer in the loose condition (of surface), when carrying out layer, on every layer of resin sand of completing, position outside the sand mold profile applies nertralizer, make the resin sand of described position keep loose condition (of surface), treat that layer is finished and resin sand solidify reach certain intensity after, remove loose resin sand and obtain required sand mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100330340A CN101214529B (en) | 2007-12-28 | 2007-12-28 | Non-model sand mold fast manufacturing technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100330340A CN101214529B (en) | 2007-12-28 | 2007-12-28 | Non-model sand mold fast manufacturing technique |
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| Publication Number | Publication Date |
|---|---|
| CN101214529A CN101214529A (en) | 2008-07-09 |
| CN101214529B true CN101214529B (en) | 2010-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100330340A Active CN101214529B (en) | 2007-12-28 | 2007-12-28 | Non-model sand mold fast manufacturing technique |
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| CN (1) | CN101214529B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101380662B (en) * | 2008-09-27 | 2012-04-25 | 佛山市峰华卓立制造技术有限公司 | Car engine cylinder body casting mold and manufacture method thereof |
| CN102397991B (en) * | 2011-11-25 | 2013-07-24 | 中国一拖集团有限公司 | Quick manufacturing method for die-free casting sand mold |
| US8567477B2 (en) * | 2012-02-29 | 2013-10-29 | Ford Global Technologies, Llc | Mold core for forming a molding tool |
| CN106694793B (en) * | 2015-11-17 | 2019-12-03 | 胡坦斯·阿尔伯图斯化学厂有限公司 | The application of alkaline compositions, corresponding method, mold and system |
| CN110576149A (en) * | 2019-10-18 | 2019-12-17 | 彰武县联信铸造硅砂有限公司 | Layered curing composite molding process for precoated sand |
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| CN101214529A (en) | 2008-07-09 |
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Address after: Bureau of Nanhai District of Shishan science and Technology Industrial Park A District 528225 Road, Guangdong city of Foshan province No. 8 Patentee after: GUANGDONG FENGHUA ZHUOLI TECHNOLOGY Co.,Ltd. Address before: 528225 Guangdong city of Foshan Province Wanda the town of Nanhai District, Shishan science and Technology Industrial Park A District Road No. six Patentee before: FOSHAN FENGHUA ZHUOLI MANUFACTURING TECHNOLOGY Co.,Ltd. |
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Denomination of invention: Non-model sand mold fast manufacturing technique Effective date of registration: 20170920 Granted publication date: 20100929 Pledgee: Foshan rural commercial bank Limited by Share Ltd. Pledgor: GUANGDONG FENGHUA ZHUOLI TECHNOLOGY Co.,Ltd. Registration number: 2017440000089 |
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Address after: 528216 C2-2, No. 8, Lizhong Road, Danzao logistics center, Danzao Town, Nanhai District, Foshan City, Guangdong Province (residence declaration) Patentee after: GUANGDONG FENGHUA ZHUOLI TECHNOLOGY Co.,Ltd. Address before: 528225 No.8 Kebao East Road, a district, Shishan Science and Technology Industrial Park, Nanhai District, Foshan City, Guangdong Province Patentee before: GUANGDONG FENGHUA ZHUOLI TECHNOLOGY Co.,Ltd. |
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Date of cancellation: 20230830 Granted publication date: 20100929 Pledgee: Foshan rural commercial bank Limited by Share Ltd. Pledgor: GUANGDONG FENGHUA ZHUOLI TECHNOLOGY Co.,Ltd. Registration number: 2017440000089 |
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Denomination of invention: Rapid Manufacturing Process of Mouldless Sand Mold Effective date of registration: 20230912 Granted publication date: 20100929 Pledgee: Foshan rural commercial bank Limited by Share Ltd. Pledgor: GUANGDONG FENGHUA ZHUOLI TECHNOLOGY Co.,Ltd. Registration number: Y2023980056345 |