CN1186145C - Casting box reversal type technique in vanish mould casting - Google Patents
Casting box reversal type technique in vanish mould casting Download PDFInfo
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- CN1186145C CN1186145C CNB031108466A CN03110846A CN1186145C CN 1186145 C CN1186145 C CN 1186145C CN B031108466 A CNB031108466 A CN B031108466A CN 03110846 A CN03110846 A CN 03110846A CN 1186145 C CN1186145 C CN 1186145C
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- casing box
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Abstract
The present invention discloses a lost mold casting box turnover moulding process, which relates to the moulding process of lost mold casting. The moulding process of the lost mold casting comprises the following steps: a model is placed on a flat plate of which the area is bigger than the projected area of the model, and the position of the upper surface at the time of casting is downward; a casing box frame of which the exterior size is smaller than the area of the flat plate is placed on the flat plate, the casing box frame can completely contain the model, and the flat plate and the casing box frame are tightly fastened together by adopting a public known method; dry sand is filled in a container formed by the casing box frame and the flat plate to be vibrated; a layer of cover plate additionally covers the upper surface of the casing box frame, and the cover plate is tightly fastened and connected with the casing box frame by adopting a public known mode; the flat plate, the casing box frame and the cover plate which are integrally connected are hoisted and are turned over by 180 DEG; the flat plate is disassembled; another casing box frame is additionally placed on the casing box frame, dry sand is added and filled in the casing box frame which is placed backwards after a pouring feeding system is connected, and vibration is carried out; a sprue cup is placed, and casting is to be carried out.
Description
Technical field: the invention belongs to a kind of foundry engieering, relate to the lost foam casting formative technology.
Background technology: the lost foam casting technology is because of having the casting quality of production height, operation is simple, the expensive advantage such as low of efficient at home and abroad is used widely in recent years, Chinese patent discloses " a kind of lost-foam casting method and equipment (CN1188698A; open day 1998.07.29) ", this lost-foam casting method and special equipment, mainly on the basis of common lost-foam casting method and equipment, improve, be characterized in sandbox, placing the foaming model, insert quartz sand, behind the molding sand consolidation, at sandbox top plastic covering film, and vacuumize terminal conduit in the sandbox positioned inside, solidify fully until foundry goods.
Disclose a kind of polystyrene foaming type lost foam casting process and used sandbox among " polystyrene foaming type lost foam casting process and used sandbox " (CN1100977A, open day 1995.09.30), processing step is to annotate dry sand to the sandbox bottom; Put into disappearance mould model; Dry sand and vibration on the notes; Add a cover cover plate and put cup; Pouring molten iron; The cast back just can be opened moulding plate removal molding sand and take out foundry goods from sandbox after 15-20 minute.Sandbox comprises casing, and case lid is at the bottom of the case; Be made up of the switching mechanism of a underframe, two or polylith base plate and base plate at the bottom of the case, can be placed on the ground of workshop by the spring lower margin, lower box is established grizzly bar on the two side.
The technical matters that extensively adopts from above content and present most producer sum up present lost foam casting institute usually the formative technology process of employing be summarized as follows:
1, the sandbox bottom adds the dry sand of suitable thickness and shakes consolidation as bed load;
2, the bubbles model that will apply coating is positioned on the bed load and connects pouring and riser systems;
3, in sandbox, fill it up with dry sand and impose vibrations, make dry sand fill up each position of model and surround model fully;
4, add a cover at the sandbox top plastic sheeting, to place cup etc. to be cast.
Adopt the limitation of above step to be: when the model part surface caves inward part and its posed positions must be at lower surface the time, fully back-up sand of the sunk part on this plane can produce sand washing or crush defective during cast.The most popular method that addresses this problem is that moulding is filled self-hardening sand at described sunk part before, but problem is not solved at all, and this is because when described sunk part was big, the volume and weight of self-hardening sand piece was very big, make the model difficult, and cause model deformation easily.Simultaneously between model and the self-hardening sand piece be connected and fixation problem also can't solve.Because self-hardening sand generally is difficult to reclaim, make cost up in addition, dry sand is seriously polluted.
Above problem makes the range of application of lost foam casting be subjected to limiting greatly, and a lot of founder authors think " lost foam casting is only applicable to the foundry goods below 500 kilograms ".
Summary of the invention: the objective of the invention is: a kind of a kind of lost foam casting sandbox turnover moulding technology that makes the effective back-up sand in model bottom surface in the lost foam casting process and can prevent model deformation is provided.
For achieving the above object, the present invention adopts a kind of sandbox upset technology to realize the lost foam casting modeling process, and its step is as follows:
1, model is positioned on the flat board of an area greater than the model projection area, the upper surface position when making its cast is downward;
2, it is little but can hold the upset frame of model fully than platen area to place overall dimensions on flat board, guarantees mold thickness greater than 50 millimeters, and makes and adopt known method to tighten together between flat board and upset frame;
3, in upset frame and dull and stereotyped formed container, fill up dry sand and impose vibrations;
4, add the lid layer cover plate at the upset frame upper surface, and it is adopted between known manner and upset frame be fastened together;
5, lifting is connected in flat board, upset frame and the cover plate of one and overturns 180 °;
6, fasteningly unclamp and take off flat board being connected between flat board and upset frame;
7, on upset frame, place another upset frame again, connect in the upset frame of placing backward behind the pouring and riser systems and fill it up with dry sand and apply vibrations;
8, it is to be cast to place cup etc.
Enforcement by above step, back-up sand when the model bottom surface in the time of can making cast under not influencing the other parts prerequisite is turned to upper surface, guaranteed should the surface fully effectively back-up sand, when being arranged, the sunk part situation need not dose self-hardening sand, even sunk part is very big, adopt this method can solve the back-up sand problem equally, so just enlarged the range of application of lost foam casting greatly, saved at the cost that uses on the self-hardening sand.In addition, model adds sand after being positioned over good dull and stereotyped the going up of a rigidity at first, and model is generally not yielding.
Description of drawings: Fig. 1 represents the situation of above-mentioned steps 1; Fig. 2 represents the situation of above-mentioned steps 2; Fig. 3 represents the situation of above-mentioned steps 3; Fig. 4 represents the situation of above-mentioned steps 4; Fig. 5 represents the situation of above-mentioned steps 6; Fig. 6 represents the situation of above-mentioned steps 7, and the specification digest accompanying drawing also adopts Fig. 6.
The specific embodiment: the present invention is further specified below in conjunction with accompanying drawing.When produce with figure in during the foundry goods of structure similar of model 2, adopt process program of the present invention just to can solve lower surface sunk part back-up sand problem.
1, as shown in Figure 1, be positioned on dull and stereotyped 1 making model 2 good and coating coating, the position that need to solve back-up sand this moment is in upper surface;
2, place a upset frame 4 on dull and stereotyped 1, need guarantee mold thickness greater than 50 millimeters in the said process, upset frame 4 are connected with base plate 1 usefulness bolt and nut 3 tighten together;
3, as shown in Figure 2, fill up dry sand 7 and impose vibrations in upset frame 4 and dull and stereotyped 1 formed container, the position that need to solve back-up sand this moment is easy to fill dry sand;
4, adding one deck cover plate 5 at sandbox 4 upper surfaces also is fastened together with bolt and nut 6, do not leak when guaranteeing under negative pressure cast, place before this upset frame 4 at these upset frame 4 peripheries and cover plate 5 contact surfaces and add the sealing gasket that one deck foamed plastics or rubber are made;
5, as shown in Figure 3, Figure 4, flat board 1, upset frame 4 and cover plate 5 that lifting is connected in one overturn 180 ° subsequently;
6, as shown in Figure 5, unclamp and take off dull and stereotyped 1 behind the bolt and nut 6;
7, adding a upset frame 8 on the upset frame 4 again and after connecting pouring and riser systems 10 on the model 2, filling it up with dry sand 7 in the upset frame 8 backward, is to guarantee the sandbox sealing, adds the sealing gasket that one deck foamed plastics or rubber are made at upset frame 4 and upset frame 8 contact surfaces;
8, it is to be cast to place cup etc.
Certainly, the present invention not only is limited to above-mentioned concrete step fully, at part foundry goods or process conditions can be suitable adjustment, for example: on upset frame 4, upset frame 8, base plate 1, cover plate 5, all can be welded with hanger, the sandbox of being convenient to overturn operation; Maybe can adopt overturn sandbox operation of the repaking mechanism of using in the conventional cast technology.
Moreover, described bolt and nut connects available such as any known easy-to-dismount fastening forms such as mechanical pressing plates; When model 2 and base plate 1 contact surface were not a plane, the body of described base plate 1 can be made should the surface corresponding approximate with model 2, at this moment the shape correspondingly-shaped driving fit of upset frame 4 and base plate 1.
Claims (4)
1, a kind of lost foam casting sandbox turnover moulding technology, its step comprises: place model, back-up sand, vibrations, connection pouring and riser systems, place cup, it is characterized in that concrete operating procedure is as follows:
A, model (2) is positioned on the flat board (1) of an area greater than the model projection area, the upper surface position when making its cast is downward;
B, go up in dull and stereotyped (1) that to place overall dimensions little but can hold the upset frame (4) of model fully than platen area, guarantee mold thickness, and make that the employing known method tightens together between flat board (1) and upset frame (4) greater than 50 millimeters;
C, in upset frame (4) and dull and stereotyped (1) formed container, fill up dry sand (7) and impose vibrations;
D, add lid layer cover plate (5), and it is adopted between known manner and upset frame (4) be fastened together at upset frame (4) upper surface;
E, lifting are connected in flat board (1), upset frame (4) and the cover plate (5) of one and overturn 180 °; F, take off flat board (1);
G, on upset frame (4), place another upset frame (8) again, connect in the upset frame of placing backward behind the pouring and riser systems (10) (8) and fill it up with dry sand (7) and apply vibrations;
H, placement cup etc. are to be cast.
2, lost foam casting sandbox turnover moulding technology according to claim 1 is characterized in that: all be welded with hanger at upset frame (4), upset frame (8), dull and stereotyped (1), cover plate on (5).
3, lost foam casting sandbox turnover moulding technology according to claim 1 is characterized in that: add the sealing gasket that one deck foamed plastics or rubber are made at upset frame (4) and upset frame (8) contact surface and upset frame (4) periphery and cover plate (5) contact surface.
4, lost foam casting sandbox turnover moulding technology according to claim 2 is characterized in that: add the sealing gasket that one deck foamed plastics or rubber are made at upset frame (4) and upset frame (8) contact surface and upset frame (4) periphery and cover plate (5) contact surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031108466A CN1186145C (en) | 2003-01-10 | 2003-01-10 | Casting box reversal type technique in vanish mould casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031108466A CN1186145C (en) | 2003-01-10 | 2003-01-10 | Casting box reversal type technique in vanish mould casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1446648A CN1446648A (en) | 2003-10-08 |
| CN1186145C true CN1186145C (en) | 2005-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031108466A Expired - Fee Related CN1186145C (en) | 2003-01-10 | 2003-01-10 | Casting box reversal type technique in vanish mould casting |
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| CN (1) | CN1186145C (en) |
Families Citing this family (19)
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|---|---|---|---|---|
| CN100446893C (en) * | 2003-12-15 | 2008-12-31 | 李自明 | Lost foam foundry method for engine cylinder |
| CN101844204B (en) * | 2010-05-10 | 2012-07-25 | 泊头市青峰机械有限公司 | Extrusion and vibration molding method for dried sand negative-pressure lost foam casting |
| CN103100672A (en) * | 2011-11-10 | 2013-05-15 | 天津市立鑫晟精细铸造有限公司 | Lost foam casting flat plate member model coating process |
| CN103212668A (en) * | 2012-01-18 | 2013-07-24 | 浙江派尼尔机电有限公司 | Method for manufacturing outboard engine cylinder |
| CN102825214B (en) * | 2012-08-30 | 2014-07-30 | 贵州安吉航空精密铸造有限责任公司 | Method for manufacturing mold casing of flanging pouring cup in investment casting process |
| CN103028708A (en) * | 2013-01-08 | 2013-04-10 | 河南省四达仙龙实业有限公司 | Tightening structure of box cover and box body of sand box |
| CN105665636B (en) * | 2016-02-01 | 2017-12-01 | 唐山东方华盛优耐高科股份有限公司 | A kind of production technology of simple casting |
| CN109550891B (en) * | 2017-09-25 | 2024-06-21 | 南京德惠新材料科技有限公司 | Lathe bed lost foam and method for casting lathe bed by using same |
| CN109550893B (en) * | 2017-09-25 | 2024-06-21 | 南京德惠新材料科技有限公司 | Base lost foam and method for casting base |
| CN109550890B (en) * | 2017-09-25 | 2024-06-28 | 南京龙宁机床装备有限公司 | Sliding seat lost foam and method for casting sliding seat by using same |
| CN109550896B (en) * | 2017-09-25 | 2024-06-28 | 南京龙宁机床装备有限公司 | Beam connecting plate lost foam and method for casting beam connecting plate by using same |
| CN108213358B (en) * | 2018-01-12 | 2021-04-20 | 山东能源重装集团乾泰精密机械有限公司 | Lost foam casting sand box for integrally casting middle groove and process |
| CN110918886B (en) * | 2018-09-20 | 2021-07-20 | 山东亿和机械装备有限公司 | Method for molding lost foam through die-splitting combined molding |
| CN109175269B (en) * | 2018-10-25 | 2020-11-13 | 芜湖泓鹄材料技术有限公司 | Large casting molding sand box structure |
| CN109175245B (en) * | 2018-10-25 | 2020-11-17 | 芜湖泓鹄材料技术有限公司 | Casting process of automobile body mould casting |
| CN110064731A (en) * | 2019-04-25 | 2019-07-30 | 河南广瑞汽车部件股份有限公司 | The vertical line casting device and casting technique of spring block after a kind of heavy truck |
| CN113351826B (en) * | 2021-05-31 | 2022-12-06 | 浙江协力机械工具有限公司 | Method for manufacturing integrally cast saw bow |
| CN113369440A (en) * | 2021-06-04 | 2021-09-10 | 河南省金太阳精密铸业股份有限公司 | Full mold casting production process by matching loose sand and resin sand |
| CN113245510A (en) * | 2021-06-09 | 2021-08-13 | 江苏润曼机械设备有限公司 | Lost foam vacuum negative compaction type casting device |
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2003
- 2003-01-10 CN CNB031108466A patent/CN1186145C/en not_active Expired - Fee Related
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| CN1446648A (en) | 2003-10-08 |
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