CN104493088A - Local lost foam casting technology - Google Patents
Local lost foam casting technology Download PDFInfo
- Publication number
- CN104493088A CN104493088A CN201410698474.8A CN201410698474A CN104493088A CN 104493088 A CN104493088 A CN 104493088A CN 201410698474 A CN201410698474 A CN 201410698474A CN 104493088 A CN104493088 A CN 104493088A
- Authority
- CN
- China
- Prior art keywords
- lost foam
- loose piece
- evaporative pattern
- foam casting
- local
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
- B22C9/046—Use of patterns which are eliminated by the liquid metal in the mould
Abstract
The invention relates to a local lost foam casting technology. The local lost foam casting technology is characterized in that a part of parts of a casting are processed to form lost foam mobilizable blocks, in molding, the lost foam mobilizable blocks are assembled to a mold main body, the assembly is fixed, and a sand filling modeling process is carried out. The local lost foam casting technology utilizes the lost foam mobilizable blocks, simplifies a model making process, is free of consideration of possibility of taking the lost foam mobilizable blocks out of the sand mold, reduces casting processes and improves production efficiency.
Description
Technical field
The present invention relates to a kind of local lost foam casting process, belong to cast molding technology field.
Background technology
In the prior art, the foundry goods that ordinary sand casting production structure is complex-shaped, the position being difficult to molding often needs to make when manufacturing apperance and can be separated with apperance body and loose piece combine by certain way, and loose piece will be able to take out smoothly from sand mold; Or employing multiple mould, or adopt multiple core, casting mold that sand mold is assembled into needs.Make Foundry Production become complicated, difficult, frock, Mold Making cost are high, many during moulder.
Summary of the invention
The object of this invention is to provide a kind of local lost foam casting process, simplified model makes, and reduces casting process, enhances productivity.
Local of the present invention lost foam casting process, makes evaporative pattern loose piece by the partial portion of foundry goods, evaporative pattern loose piece and apperance body is assembled together, fixes rear filling moulding during moulding.
Evaporative pattern loose piece is made at position foundry goods being difficult to molding.
The assembling mode of apperance body and evaporative pattern loose piece is dovetail type, locating pin type, rotary.
Evaporative pattern loose piece is polystyrene foam material.Evaporative pattern burning by the heat effect of molten metal when pouring into a mould, gasifying.
After moulding, evaporative pattern loose piece need not take out from sand mold.
Evaporative pattern loose piece is disposable, all will lay new loose piece before each moulding.Apperance body is reusable, the same with common apperance.
This technique is used for self-hardening sand molding.
Evaporative pattern loose piece is made at the position that foundry goods is difficult to molding by local of the present invention lost foam casting process, evaporative pattern loose piece and apperance body is assembled together, fixes rear filling moulding during moulding.Apperance body refers to the apperance main part outside removing evaporative pattern loose piece; apperance body and evaporative pattern loose piece be with the modes such as alignment pin, dovetail chute be assembled together filling moulding molding time; apperance body part is separated with sand mold; evaporative pattern loose piece part is stayed in sand mold; can take out and just take out, bad taking-up is not just taken out.During the sand mold cast of making, the evaporative pattern loose piece do not taken out runs into molten metal burning, gasification.Evaporative pattern loose piece and apperance body assemble the same with apperance body assembly method with the loose piece of common band lug pattern.
Compared with prior art, the present invention has following beneficial effect:
Local of the present invention lost foam casting process utilizes evaporative pattern loose piece, simplifies modelling, more need not consider that can evaporative pattern loose piece take out from sand mold, reduces casting process, improves production efficiency.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described further.
Embodiment 1
The present embodiment is the gear case body casting technique of gear motor, and foundry goods circular flange part is made evaporative pattern loose piece, and evaporative pattern loose piece is polystyrene foamed material.
During moulding, evaporative pattern loose piece and apperance body are assembled together, fix rear filling moulding.During moulding, this loose piece need not take out from sand mold, during cast iron liquid, and the evaporative pattern loose piece of polystyrene foam material and iron liquid catalytic combustion, gasification, the cavity of formation after the gasification of iron liquid filling loose piece.
The assembling mode of apperance body and evaporative pattern loose piece is dovetail type, locating pin type or rotary.
Evaporative pattern loose piece is disposable, and each casting all will lay once same evaporative pattern loose piece.Apperance body is reusable, the same with common apperance.
Simplify apperance to make and molding operation.As pressed conventional casting methods, this foundry goods moulding need adopt three-cavity moulding or make profile core, and need to make profile core box, moulding cost is higher.
Claims (6)
1. a local lost foam casting process, is characterized in that, the partial portion of foundry goods is made evaporative pattern loose piece, evaporative pattern loose piece and apperance body are assembled together, fix rear filling moulding during moulding.
2. local according to claim 1 lost foam casting process, is characterized in that, the assembling mode of apperance body and evaporative pattern loose piece is dovetail type, locating pin type or rotary.
3. local according to claim 1 lost foam casting process, is characterized in that, evaporative pattern loose piece is polystyrene foam material.
4. local according to claim 1 lost foam casting process, is characterized in that, after moulding, evaporative pattern loose piece need not take out from sand mold.
5. local according to claim 1 lost foam casting process, is characterized in that, evaporative pattern loose piece is disposable, all will lay new loose piece before each moulding.
6. local according to claim 1 lost foam casting process, is characterized in that, this technique is used for self-hardening sand molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410698474.8A CN104493088A (en) | 2014-11-26 | 2014-11-26 | Local lost foam casting technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410698474.8A CN104493088A (en) | 2014-11-26 | 2014-11-26 | Local lost foam casting technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104493088A true CN104493088A (en) | 2015-04-08 |
Family
ID=52934588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410698474.8A Withdrawn CN104493088A (en) | 2014-11-26 | 2014-11-26 | Local lost foam casting technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104493088A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111054888A (en) * | 2019-12-30 | 2020-04-24 | 山东汇金股份有限公司 | Method for casting bracket by using local lost foam |
-
2014
- 2014-11-26 CN CN201410698474.8A patent/CN104493088A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111054888A (en) * | 2019-12-30 | 2020-04-24 | 山东汇金股份有限公司 | Method for casting bracket by using local lost foam |
| CN111054888B (en) * | 2019-12-30 | 2021-07-06 | 山东汇金股份有限公司 | Method for casting bracket by using local lost foam |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20150408 |