CN103962502A - Method for negative pressure casting of cylinder body and foamed plastic mould - Google Patents
Method for negative pressure casting of cylinder body and foamed plastic mould Download PDFInfo
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- CN103962502A CN103962502A CN201310031729.0A CN201310031729A CN103962502A CN 103962502 A CN103962502 A CN 103962502A CN 201310031729 A CN201310031729 A CN 201310031729A CN 103962502 A CN103962502 A CN 103962502A
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- sandbox
- mould
- screw nail
- connecting screw
- cylinder block
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Abstract
The invention relates to a method for negative pressure casting of a cylinder body and a foamed plastic mould. A mould of a cylinder body casting is an integrated mould made of ordinary foamed plastics, the mould is formed in a solid manner after being placed in a metal plate sand box and being filled with foundry sand, the mould is free of being pulled and taken out and becomes a disposable solid mould, melted high-temperature metal liquid is poured into the foamed plastic mould of the sand box from a sprue by a general casting method, the high-temperature metal liquid makes the foamed plastic mould melt, combust, and disappear to form a vacuum negative pressure cavity, and the metal liquid is filled in the negative pressure cavity formed by the plastic mould under the weight of the metal liquid itself and outside atmospheric pressure to form the cylinder body casting. The method has the advantages of simple casting process, low labor intensity, high casting quality, low rejection rate, high production efficiency and low production cost.
Description
Technical field
The present invention relates to the cylinder block of engine, especially relate to the cylinder block of casting high-power engine, belong to engine cylinder body casting field.
Background technology
Casting industry is the casting industry of machine metal parts especially; mostly to adopt the isobaric casting method casting of evacuated mould; with timber or other materials, manufacture in advance wooden model or metal pattern or an other materials mold identical with foundry goods material object; founding becomes evacuated mould; then adopt traditional isobaric casting method; high temperature fluent metal is poured into a mould in evacuated mould, cast out the metal casting of this part.Isobaric casting method is that the atmospheric pressure of evacuated mould equates with external atmospheric pressure, and high temperature fluent metal enters in evacuated mould in himself gravity current downflow.
At present, the cylinder block of high-power engine is mostly to adopt traditional evacuated mould equipressure method to cast out cylinder block castings, then the machined cylinder block that meets designing requirement that becomes.
Because the volume and weight of high-power engine cylinder block is larger, its weight is about hundreds of kilograms, complex structure, adopt traditional evacuated mould equipressure method casting to have a lot of shortcoming and defect, complex process, founding labour intensity is large, need to reserve maching dimension surplus, production efficiency is low and cost is high, percent defective is high, high to workman's skills involved in the labour requirement, etc., become old, large, the difficult problem of casting industry, need badly and improved and solve.
Summary of the invention
Object of the present invention, be to provide a kind of negative-pressure casting method and foamed plastics mould with foamed plastics mould negative pressure casting high-power engine cylinder block, solve the casting technique complexity that the casting of high-power engine cylinder block exists, founding labour intensity is large, of poor quality, percent defective is high, and production efficiency is low, the technical problem that cost is high.
Principle of the present invention is, the entity foamed plastics mould identical with cylinder block material object is in casting process, the high temperature (approximately 1200 ℃) that is poured into the high temperature fluent metal of cylinder block castings melts, burns and disappears, form negative pressure of vacuum die cavity, liquid metal is filled full negative pressure of vacuum die cavity under self gravitation and external atmospheric pressure, forming cylinder block castings, is negative-pressure casting method.Foamed plastics mould is disposable use, can not reuse again.The material of foamed plastics mould is general foamed plastics, approximately 150 ℃ of its fusion temperatures, and approximately 300 ℃ of ignition temperatures, wide material sources, lightweight, cheap, processing and manufacturing is easy.General casting method is just utilized the gravity of liquid metal own, the cavity filling mould that flows, and the atmospheric pressure of evacuated mould equates with external atmospheric pressure, is isobaric casting method.
The molding material that isobaric casting method is used is the mold of reusable wooden model or metal pattern or other materials manufacture, and its casting method contrasts as follows with using excellent, the shortcoming of foamed plastics mould negative pressure casting cylinder block method:
(continuous upper table)
From above contrast, can obviously find out, the present invention is entity mould and negative-pressure casting method, than general casting method evacuated mould and isobaric casting method, has outstanding substantive distinguishing features and significant progressive.
Technical scheme of the present invention is: the negative-pressure casting method and the foamed plastics mould that comprise cylinder block.With regular-type foam plastic material, the foamed plastics mould identical with structure with shape cylinder block castings that make is positioned over the moulding plate of being made by metallic plate, sandbox left plate, sandbox right plate, in the spliced sandbox that after sandbox header board and sandbox, plate is spliced into, fill full conventional cast molding sand, global formation, become disposable entity mold, do not need withdrawing pattern to take out, then cover sandbox upper cover plate, and with connecting angle iron and connecting screw nail, spliced sandbox is fastenedly connected respectively, then will melt, the required high temperature metal liquid of cast block foundry goods is poured into a mould into the foamed plastics of sandbox in-molded with general casting method from sandbox cast gate, after to be cooled solidifying, open sandbox and take out the sand removal of finished product cylinder block castings.
Or what regular-type foam plastics were made is positioned in the fixed rigid flask of general casting use with cylinder identical foamed plastics mould in kind, fill full conventional cast molding sand, global formation, then the high temperature metal liquid having melted, cast block is required is poured into a mould into the foamed plastics of sandbox in-moldedly with general casting method from sandbox cast gate, after to be cooled solidifying, from sandbox, taken out cylinder block castings sand removal.
The advantage of spliced sandbox is to be divided into single plate manufacture by sandbox volume is large, that weight is large, during use, be spliced into rigid flask, manufacture simple, easy to use, after the moulding of Mold for Plastics filling molding sand, can take if desired spliced sandbox certain part plate wherein apart and check whether molding sand is full of, tamps.After cast, can take then sand removal apart by single plate, after use, can take collection apart by single plate, have advantages of that manufacture is simple, it is flexible to use, convenient and saving production site.
The volume of fixed rigid flask is large, and weight is large, but does not need splicing while using, and is applicable to site area large and produce in enormous quantities.
It is simple that the present invention has casting technique, and labour intensity is little, and casting quality is high, and percent defective is few, production efficiency height and the low advantage of production cost.
Accompanying drawing explanation
Fig. 1 is that the master of the spliced sandbox of the present invention looks cross-sectional schematic;
Fig. 2 is the top view of Fig. 1;
Fig. 3 is the top view of the spliced sandbox casing of Fig. 1.
In figure:
1. connecting angle iron A 2. connecting screws are followed closely A 3. foamed plastics moulds
4. sandbox left plate 5. connecting angle iron B 6. connecting screws are followed closely B
7. moulding plate 8. connecting screw nail C 9. connecting screws are followed closely D
10. sandbox upper cover plate 11. rising head A 12. cylinder barrels
13. sandbox cast gate 14. rising head B 15. sandbox right plates
16. connecting angle iron C 17. connecting screw nail E 18. connecting screw nail F
19. connecting screw nail G 20. connecting angle iron D 21. connecting screw nail H
22. casting sand 23. connecting angle iron E 24. connecting screw nail I
25. connecting screw nail K 26. connecting screw nail L 27. connecting angle iron F
28. connecting screw nail M 29. connecting screw nail N 30. connecting angle iron G
31. connecting screw nail J 32. connecting angle iron H 33. connecting screw nail P
Plate 36. connecting screw nail R after 34. connecting screw nail Q 35. sandboxes
37. connecting screw nail X 38. connecting angle iron K 39. sandbox header boards
40. connecting screw nail Y 41. connecting angle iron L 42. connecting screw nail Z
The specific embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
The present invention includes negative-pressure casting method and the foamed plastics mould of engine cylinder body.
The mold of cylinder block castings is monoblock type foam mould of plastics 3, and with regular-type foam plastic material, the foamed plastics mould 3 identical with structure with shape cylinder block castings that make is positioned over the moulding plate 7 of being made by metallic plate, sandbox left plate 4, sandbox right plate 15, in the spliced sandbox that after sandbox header board 39 and sandbox, plate 35 is spliced into, fill full conventional cast molding sand, global formation, becomes disposable entity mold, does not need withdrawing pattern to take out, and then covers sandbox upper cover plate 10, and uses respectively connecting angle iron A1, connecting angle iron B5, connecting angle iron C16, connecting angle iron D20, connecting angle iron E23, connecting angle iron F27 and connecting screw nail A2, connecting screw nail D9, connecting screw nail B6, connecting screw nail C8, connecting screw nail E17, connecting screw nail F18, connecting screw nail G19, connecting screw nail H21, connecting screw nail I24, connecting screw nail K25, connecting screw nail L26, connecting screw nail M28 is fastenedly connected spliced sandbox, then will melt, the required high temperature metal liquid of cast block foundry goods is poured into a mould the interior moulding of foam mould 3 into sandbox with general casting method from sandbox cast gate 13, opens sandbox and take out the sand removal of finished product cylinder block castings after to be cooled solidifying.
After the sandbox left plate 4 of spliced sandbox, sandbox, plate 35, sandbox right plate 15 and sandbox header board 39 are fastenedly connected with connecting angle iron G30, connecting angle iron K38, connecting angle iron L41, connecting angle iron H32 and connecting screw nail N29, connecting screw nail J31, connecting screw nail R36, connecting screw nail X37, connecting screw nail Y40, connecting screw nail Z42, connecting screw nail P33, connecting screw nail Q34 respectively.
Rising head A11 and rising head B14 are general casting process rising heads.
Cylinder barrel 12 is cylinder barrels of the present embodiment high-power engine six cylinder cylinder blocks.
Or that regular-type foam plastics are made, identical with cylinder material object foamed plastics mould 3 is positioned in the fixed rigid flask of general casting use, fill full conventional cast molding sand, global formation, then the high temperature metal liquid having melted, cast block is required is poured into a mould to the interior moulding of foam mould 3 into sandbox with general casting method from sandbox cast gate, after to be cooled solidifying, from sandbox, take out cylinder block castings sand removal.
Claims (3)
1. the method for negative pressure casting cylinder block and foamed plastics mould, comprise and it is characterized in that negative-pressure casting method and the foamed plastics mould of cylinder block: the mold of cylinder block castings is made with regular-type foam plastic material, the foamed plastics mould (3) identical with structure with the shape of cylinder block castings is positioned over the moulding plate (7) of being made by metallic plate, sandbox left plate (4), sandbox right plate (15), in the spliced sandbox that after sandbox header board (39) and sandbox, plate (35) is spliced into, fill full conventional cast molding sand, global formation, become disposable entity mold, do not need withdrawing pattern to take out, then cover sandbox upper cover plate (10), and use respectively connecting angle iron A (1), connecting angle iron B (5), connecting angle iron C (16), connecting angle iron D (20), connecting angle iron E (23), connecting angle iron F (27) and connecting screw nail A (2), connecting screw nail D (9), connecting screw nail B (6), connecting screw nail C (8), connecting screw nail E (17), connecting screw nail F (18), connecting screw nail G (19), connecting screw nail H (21), connecting screw nail I (24), connecting screw nail K (25), connecting screw nail L (26), connecting screw nail M (28) is fastenedly connected spliced sandbox, then will melt, the required high temperature metal liquid of cast block foundry goods is poured into a mould the interior moulding of foamed plastics mould (3) into sandbox with general casting method from sandbox cast gate (13), opens sandbox and take out the sand removal of finished product cylinder block castings after to be cooled solidifying.
2. the method for negative pressure casting cylinder block and foamed plastics mould, it is characterized in that: that regular-type foam plastics are made, identical with cylinder material object foamed plastics mould (3) is positioned in the fixed rigid flask of general casting use, fill full conventional cast molding sand, global formation, then the high temperature metal liquid having melted, cast block is required is poured into a mould to the interior moulding of foamed plastics mould (3) into sandbox with general casting method from sandbox cast gate, after to be cooled solidifying, from sandbox, take out cylinder block castings sand removal.
3. the method for negative pressure casting cylinder block according to claim 1 and foamed plastics mould, it is characterized in that: the shape of foamed plastics mould (3) is identical with shape and the structure of the cylinder block of negative pressure casting with structure, be disposable monoblock type entity mold, do not need withdrawing pattern to take out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310031729.0A CN103962502A (en) | 2013-01-28 | 2013-01-28 | Method for negative pressure casting of cylinder body and foamed plastic mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310031729.0A CN103962502A (en) | 2013-01-28 | 2013-01-28 | Method for negative pressure casting of cylinder body and foamed plastic mould |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103962502A true CN103962502A (en) | 2014-08-06 |
Family
ID=51232776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310031729.0A Pending CN103962502A (en) | 2013-01-28 | 2013-01-28 | Method for negative pressure casting of cylinder body and foamed plastic mould |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103962502A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105215293A (en) * | 2015-10-23 | 2016-01-06 | 临沂大学 | A kind of bent angle shape sandbox foundary weight mechanism with auto-lock function |
-
2013
- 2013-01-28 CN CN201310031729.0A patent/CN103962502A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105215293A (en) * | 2015-10-23 | 2016-01-06 | 临沂大学 | A kind of bent angle shape sandbox foundary weight mechanism with auto-lock function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| DD01 | Delivery of document by public notice |
Addressee: Chongqing Sanchai Engine Manufacture Co., Ltd. Document name: Notification of before Expiration of Request of Examination as to Substance |
|
| DD01 | Delivery of document by public notice |
Addressee: Chongqing Sanchai Engine Manufacture Co., Ltd. Document name: Notification that Application Deemed to be Withdrawn |
|
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140806 |