CN203437599U - Vacuum negative-pressure sand box assembly - Google Patents
Vacuum negative-pressure sand box assembly Download PDFInfo
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- CN203437599U CN203437599U CN201320391433.5U CN201320391433U CN203437599U CN 203437599 U CN203437599 U CN 203437599U CN 201320391433 U CN201320391433 U CN 201320391433U CN 203437599 U CN203437599 U CN 203437599U
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Abstract
The utility model belongs to the field of sand casting, and in particular relates to a vacuum negative-pressure sand box assembly. The vacuum negative-pressure sand box assembly comprises a sand box unit, a pressure extracting unit and a pressure regulating unit, wherein the pressure extracting unit is used for extracting the inner cavity pressure of the sand box unit, and the pressure regulating unit is used for regulating the extracted pressure of the inner cavity of the sand box unit. Based on the pressure regulating function of the pressure regulating unit for the inner cavity of the sand box unit, the adjustability of the inner cavity pressure of the sand box unit in the pressure extracting process is ensured, and finally the timely pressure regulation for the extracted pressure of the sand box unit is realized. The components can be used in the high pressure working environment such as lost foam and can also be fully used on the occasion that the pressure in the sand box unit must be regulated in time for some special needs. The vacuum negative-pressure sand box assembly has the advantages of simple structure, relatively wider range of application and stablility and reliability in working.
Description
Technical field
The utility model belongs to sand casting field, is specifically related to a kind of vacuum negative-pressure flask assembly.
Background technology
Vacuum negative-pressure flask, for being applied to particularly one of main parts in the forging type such as evaporative pattern of vacuum moulding field, its Main Function is and holds and support sand mold.Existing vacuum negative-pressure flask, mainly comprises being box-like housing and being arranged at for detaching the air of housing inner chamber air, detaching mouth on box body; During use, rely on film that its housing top oral area paving covers with and inner walls enclose closed environment, then by air, detach mouthful external vavuum pump etc. to detach its inner chamber air, the object that finally plays consolidation sand mold and form firm die cavity.Existing vacuum negative-pressure flask, the name that its structure is the application of Fujian Chen Hui Hardware Products Co., Ltd. application people is called " a kind of negative-pressure flask " (application number: record to some extent in utility model patent 200920139498.4): comprise box-packed housing, at its housing wall, reinforcement is set, housing bottom face place is furnished with and is suction pressure vacuum transverse tube and the suction pressure vacuum transverse tube vertical tube that comb teeth-shaped arranges, each is inhaled and presses vacuum tube to be communicated with its inner chamber place by being arranged at the filter screen at housing bottom face place, it is inhaled and presses vacuum tube to inhale the outside pressure part of inhaling of pressure head connection by being positioned at the outer spy of its bottom.Said structure no doubt can be realized its vacuum and take out pressure object, yet, the defect of its existence is still apparent: on the one hand, inefficiency, said structure in use, only relies on the one-sided pressure performance of taking out of housing, is often difficult to realize fast the fastening closely knit object of its sand mold, its sandbox is larger, and it is taken out and presses the defect of efficiency deficiency just obvious; On the other hand, existing sandbox often focuses in its sandbox, whether air can be detached timely and effectively, thereby guarantee that its inner chamber forms rapidly vacuum environment to facilitate effective execution of subsequent handling, and do not focus on the adjustability that it takes out pressure pressure completely, when it is applied to some and need carries out the occasion of in good time pressure regulation to sandbox internal pressure, said structure just cannot meet that it is actual required.For said circumstances, how to provide a kind of simple in structure and can realize the sandbox assembly that carries out in good time pressure regulation for suction pressure in sandbox, be that those skilled in the art compel technical barrier to be solved.
Summary of the invention
The purpose of this utility model is to provide a kind of vacuum negative-pressure flask assembly simple in structure, can realize the in good time pressure regulation for suction pressure in sandbox, and its working stability is reliable.
For achieving the above object, the utility model has adopted following technical scheme: a kind of vacuum negative-pressure flask assembly, comprise sandbox unit and take out pressure unit for what extract sandbox unit chamber pressure, described sandbox assembly also comprises for regulating the pressure regulation unit of sandbox unit inner chamber suction pressure size.
Major advantage of the present utility model is: the voltage regulation function based on pressure regulation unit for sandbox unit inner chamber, thus guarantee that sandbox unit is in the adjustability of taking out the chamber pressure while pressing operation, the final in good time pressure regulation realizing for suction pressure in sandbox unit; Above-mentioned parts not but still can use the high pressure working environments such as evaporative pattern, more can be competent at some special requirement and the occasion that must carry out in good time pressure regulation to sandbox unit internal pressure completely, and it is simple in structure, and range of application is wider and working stability is reliable.
Accompanying drawing explanation
Fig. 1 is the front cavity structure schematic diagram of overlay film sand mold upper plate of the present utility model;
Fig. 2 is the I part partial enlarged drawing of Fig. 1;
Fig. 3 is that the upper and lower plates of overlay film sand mold of the present utility model coordinates schematic diagram;
Fig. 4 is sandbox cell operation status architecture schematic diagram;
Fig. 5 is the positive cross-sectional schematic of Fig. 4;
Fig. 6 is workflow diagram of the present utility model;
Fig. 7 is pressure regulation cell operation schematic diagram.
The specific embodiment
An assembly, comprises sandbox unit 10 and presses unit 20 for extracting taking out of sandbox unit 10 chamber pressures, described sandbox assembly also comprises for regulating the pressure regulation unit 30 of sandbox unit 10 inner chamber suction pressure sizes.Its concrete structure can be with reference to as shown in Fig. 4-7, the utility model is by arranging pressure regulation unit 30, the pressure regulation unit 30 of voltage regulation function based on to(for) sandbox unit inner chamber, thereby guarantee the adjustability of the chamber pressure of sandbox unit 10 when taking out pressure operation, the final in good time pressure regulation realizing for sandbox unit 10 interior suction pressures; Above-mentioned parts are not but still can be applicable to the working environment that the high pressures such as lost foam casting are taken out pressure (can reach 5 to 6 atmospheric pressures), the occasion that more can be competent at some special requirement completely and must carry out in good time pressure regulation to sandbox unit 10 internal pressures, it is simple in structure, and range of application is wider and working stability is reliable.
For convenience of reader understanding aforementioned " occasion that must carry out in good time pressure regulation to sandbox unit 10 internal pressures because of special requirement ", this sentences way of example it is made the following instructions:
Embodiment: at present, traditional precoated sand mold casting for small productions such as microballoons, main employing buried husky pouring type; First which need make for the overlay film sand mold as product die cavity (being also core), be the densely covered semicircular cavities a of upper and lower opposed platy structure and one lateral plates, the upper and lower plates matched moulds of overlay film sand mold encloses and forms a plurality of spherical die cavities, between each semicircular cavities a, arrange connection each other for connecting the molten steel runner c of main running channel b, as Figure 1-3, again the overlay film sand mold list group after its matched moulds is imbedded in common external form sand afterwards; During cast, by molten steel, enter main running channel b, via molten steel runner c, flow in each spherical die cavity successively again, its common external form sand corresponding assurance is poured into a mould and insulation operation for the auxiliary sizing of its core, finally utilize the high accuracy of the die cavity of core own and the insulation styling of common external form sand, thereby reach its high quality of finished demand; Yet, high warm nature due to pour steel itself, when actual production is poured into a mould, the inevitable high temperature melt phenomenon existing on the part contacting with molten steel of core of being made by resin, the sharp aroma of its generation and flame are along its molten steel runner ascension, thereby at its place, sprue gate, generate excitant pernicious gas and the high temperature flare with strong sharp aroma, not only operating personnel's healthy generation is greatly damaged, also surrounding environment is had a negative impact; Simultaneously, fine and closely woven property and complexity due to core inner chamber place molten steel runner, in casting process, often cause its cast waste gas from core, not discharge completely and timely, be easy to produce air bound phenomenon, in addition, fine and closely woven the arranging of its molten steel runner also had influence on the mobility of molten steel itself greatly, thereby cause molten steel fully not fill die cavity, cause waste product to produce in a large number, affect its rate that manufactures a finished product; Secondly, existing precoated sand moulding enterprise is for guaranteeing its yield rate, the direct pouring operation modes of single core assembly mould that adopt more, not only labour intensity is large, also causes the reduction of its finished product efficiency, must constantly guarantee in addition the temperature uniformity of molten steel in stove, to meet a plurality of casting mold demands, this just must heat always, causes electric furnace constant temperature time long, and the consumption of electric energy is very big; Finally, because existing placingJi Shu is, rely on the mobility of molten steel self to guarantee that it is full of each inner chamber place of core, cause its duration of pouring long, the production cycle is long, thereby has affected greatly the economic benefit of enterprise.In view of the foregoing, applicant, after design research and development, by making semiclosed and even totally-enclosed sandbox, realizes the vacuum pumping of 10 inside, sandbox unit, thereby solves aforementioned variety of issue, and guarantee its actual operating efficiency in cast.
In fact, when vacuum pumping is carried out in 10 inside, sandbox unit, due to it, take out and press object to be only to realize to effectively the detaching of its inner chamber high-temp waste gas and flame, thereby take out pressure with consolidation and form die cavity for the high pressure of the grains of sand with evaporative pattern itself, be essentially different; And for the sandbox unit 10 under different volumes and operating environment, its needed suction pressure also all floats and cannot lump together, its sandbox unit 10 internal pressure sizes more should be accordingly according to the situation; The speed of evacuation is excessive, and the interior vacuum in sandbox unit 10 is excessive, causes the high velocity flow of its inner molten steel, causes molten steel cooling too early, affects on the contrary its effective casting performance; And once the speed of evacuation is too small, cast waste gas and thermal-flame that pouring molten steel produces cannot be taken away in time, after its waste gas and flame ascension, certainly will scald and burn the film B that is positioned at sandbox unit 10 oral areas, as shown in Figure 6, thereby the air-tightness of its casing be damaged.The utility model adopts above-mentioned pressure regulation unit 30, thereby rely on pressure control unit 30 for the regulating action of airflow pipeline D internal pressure, guarantee that 10 inside, sandbox unit are all the time within the scope of optimum pressure value, guaranteed that sandbox unit 10 air pressure inside both can normally realize effectively detaching of waste gas and flame, and don't the mobility of destruction molten steel itself, and then promote its operating efficiency and finished product rate.
As further preferred version of the present utility model, as shown in Fig. 6-7, described pressure regulation unit 30 is in sandbox unit 10 and take out on the one section of airflow pipeline D pressing between unit 20.
When reality is used, its pressure regulation unit 30 profiles can be with reference to shown in Fig. 6-7, pressure regulation unit 30 comprises for being communicated with to take out presses the outlet side 31 of unit 20 and the first inlet end 32 that is communicated with sandbox unit 10, take out on pressure unit 20 and be also provided with for being communicated with the second inlet end 33 of extraneous air, on described the second inlet end 33, be provided with the control valve 33a that regulates its air inflow.Now, its pressure regulation unit 30 forms similar three-way converging valve columnar structure, and two ends air inlet and give vent to anger in one end, by its air end also i.e. air-flow compensate function of the second inlet end 33, realizes the pressure limiting effect to its first inlet end 32.Specific works is: open and take out while pressing unit 20, as control valve, 33a closes, and the second inlet end 33 is closed, and the first inlet end 32 is realized its maximum suction pressure, and the full pressure in sandbox unit 10 is taken out pressure; Turn control valve 33a, the second inlet end 33 starts to connect gradually extraneous air, now takes out and presses bleeding of unit 20 to come from extraneous air and sandbox unit 10 inner chamber air sums, and sandbox unit 10 chamber pressures start reduction by full pressure gradually; As control valve, 33a opens completely, and the second inlet end 33 is realized maximum extraneous air and entered, and the suction pressure of the first inlet end 32 is corresponding is reduced to minimum suction pressure, and pressure is taken out with minimum suction pressure in sandbox unit 10.
As further preferred version of the present utility model: take out and press unit 20 for vavuum pump, described pressure regulation unit 30 profiles are the airtight cylindric of hollow, its outlet side 31 is relative with the second inlet end 33 is opened in place, both ends, and its first inlet end 32 runs through and is opened on its post jamb.In addition, for guaranteeing the reliably monitoring for pressure regulation unit 30, pressure regulation unit 30 also comprises for showing its internal pressure Pressure gauge 34, thereby completely realize controllable voltage regulating object of the present utility model, its Pressure gauge 34 can be arranged on its post jamb, also can be arranged at other positions, just repeat no longer one by one herein.
Further, sandbox unit 10 comprises the box-like housing 11 of rectangle, housing 11 each lateral wall places are the affixed pressure pipe road 12 of taking out of corresponding attaching all, the described pressure pipe road 12 of respectively taking out is communicated with housing 10 inner chambers and is furnished with the screen pack 13 for the isolated grains of sand between the two, sandbox unit 10 also comprises for being communicated with to plug into take out presses the vacuum of unit 20 and sandbox unit 10 inner chambers to take out pressure side 14, respectively takes out pressure pipe road 12 and via housing 11 lateral walls, postpones and be intersected in vacuum and take out pressure side 14 places; Vacuum is taken out the wherein side lateral wall place that pressure side 14 is arranged at housing 10, and concrete structure is as shown in Fig. 4-5.Aforementionedly said, the utility model is different from the large pressure consolidation of the one side shell wall of evaporative pattern and takes out pressure, the pressure mode of taking out in Fig. 6 is more focused on the extraction completely for sandbox unit 10 inner chamber thermal-flames and irritative gas, by five faces unique on sandbox unit 10, enclose and take out cooperatively interacting of design and pressure regulation unit 30, thereby guarantee effectively detaching of sandbox unit 10 internal high temperature flames and gas, both avoided the large pressure of one side to take out pressing the too fast and too early cooling condition of the molten steel flow speed cause, be unlikely to again to take out to press because of too small pressure the burn phenomenon of film B of thermal-flame and gas ascension occurs, its reliable and stable work.
For ease of explanation, in conjunction with diagram, by the utility model, the workflow in conjunction with previous embodiment is set forth as follows herein:
(1), casting
Before a, casting, discharge the sandbox unit 10 that core A and the husky E of external form are housed with suspension hook, in sandbox unit, 10 upper end oral areas are spread plastic sheeting B, and on film B, repave one deck for the protection of the husky C of press mold of film B.
B, will between sandbox unit 10, vavuum pump, pressure regulation unit 30 and water tank with strainer F, by airflow pipeline D, connect successively, start vavuum pump, by the control valve on pressure regulation unit 30, regulate the pressure of airflow pipeline D.(note: now pressure control intensity is unsuitable excessive or too small, excessive air stream rapidly can too early cooling molten steel; Too small suction can not reach the object of the flame of effectively bleeding not, and concrete numerical value is determined according to actual conditions, and the general larger numerical value of foundry goods is larger; Arrow points shown in Fig. 4-7 is seen in the path that detaches of its waste gas and flame.）
When C, casting, molten steel injects the core A inner chamber that is positioned at sandbox unit 10 via sprue gate, under the traction of sandbox unit 10 internal negative pressures, and molten steel Fast Filling sandbox; Simultaneously, core A touches molten steel and the high-temp waste gas that produces and flame see through the external form intergranular gap that rustles and along the vacuum that is positioned at sandbox unit 10 side-walls, takes out pressure side 14 and take away, its high-temp waste gas and flame, successively by pressure regulation unit 30 and water tank with strainer F, are discharged after purifying via water tank with strainer F multistage.
(2), annealing naturally
The sandbox unit 10 that preorder has been cast, indoor placement is carried out waste heat for 24 hours and is naturally annealed.
(3), husky processing
To external form, husky E reclaims, to recycle, cost-saving.
Claims (7)
1. a vacuum negative-pressure flask assembly, comprise sandbox unit (10) and press unit (20) for extracting taking out of sandbox unit (10) chamber pressure, it is characterized in that: described sandbox assembly also comprises for regulating the pressure regulation unit (30) of sandbox unit (10) inner chamber suction pressure size.
2. sandbox assembly according to claim 1, is characterized in that: described pressure regulation unit (30) is positioned at sandbox unit (10) and takes out on one section of airflow pipeline of pressing between unit (20).
3. sandbox assembly according to claim 1 and 2, it is characterized in that: described pressure regulation unit (30) comprises for being communicated with to take out presses the outlet side (31) of unit (20) and the first inlet end (32) that is communicated with sandbox unit (10), take out on pressure unit (20) and be also provided with for being communicated with second inlet end (33) of extraneous air, on described the second inlet end (33), be provided with the control valve (33a) that regulates its air inflow.
4. sandbox assembly according to claim 3, it is characterized in that: take out and press unit (20) for vavuum pump, described pressure regulation unit (30) profile is the airtight cylindric of hollow, its outlet side (31) is relative with the second inlet end (33) is opened in place, both ends, and its first inlet end (32) runs through and is opened on its post jamb.
5. sandbox assembly according to claim 4, is characterized in that: pressure regulation unit (30) also comprise for showing its internal pressure Pressure gauge (34).
6. sandbox assembly according to claim 1 and 2, it is characterized in that: sandbox unit (10) comprise the box-like housing of rectangle (11), each lateral wall place of housing (11) is the affixed pressure pipe road (12) of taking out of corresponding attaching all, the described pressure pipe road (12) of respectively taking out is communicated with housing (10) inner chamber and is furnished with the screen pack (13) for the isolated grains of sand between the two, sandbox unit (10) also comprises for being communicated with to plug into take out presses the vacuum of unit (20) and sandbox unit (10) inner chamber to take out pressure side (14), respectively taking out pressure pipe road (12) postpones via housing (11) lateral wall and is intersected in vacuum and take out pressure side (14) and locate.
7. sandbox assembly according to claim 6, is characterized in that: vacuum is taken out the wherein side lateral wall place that pressure side (14) is arranged at housing (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320391433.5U CN203437599U (en) | 2013-07-03 | 2013-07-03 | Vacuum negative-pressure sand box assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320391433.5U CN203437599U (en) | 2013-07-03 | 2013-07-03 | Vacuum negative-pressure sand box assembly |
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| CN203437599U true CN203437599U (en) | 2014-02-19 |
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| CN201320391433.5U Expired - Lifetime CN203437599U (en) | 2013-07-03 | 2013-07-03 | Vacuum negative-pressure sand box assembly |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105929864A (en) * | 2016-05-31 | 2016-09-07 | 共享装备股份有限公司 | Large-sized complex casting expendable pattern casting process vacuum degree automatic adjustment system and method |
| CN109202025A (en) * | 2018-11-13 | 2019-01-15 | 黄山中发耐磨材料有限公司 | Arenaceous shell core pattern casting method |
| CN109226696A (en) * | 2018-11-13 | 2019-01-18 | 黄山中发耐磨材料有限公司 | Arenaceous shell core pattern pouring box |
-
2013
- 2013-07-03 CN CN201320391433.5U patent/CN203437599U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105929864A (en) * | 2016-05-31 | 2016-09-07 | 共享装备股份有限公司 | Large-sized complex casting expendable pattern casting process vacuum degree automatic adjustment system and method |
| CN109202025A (en) * | 2018-11-13 | 2019-01-15 | 黄山中发耐磨材料有限公司 | Arenaceous shell core pattern casting method |
| CN109226696A (en) * | 2018-11-13 | 2019-01-18 | 黄山中发耐磨材料有限公司 | Arenaceous shell core pattern pouring box |
| CN109202025B (en) * | 2018-11-13 | 2021-08-06 | 黄山中发耐磨材料有限公司 | Sand shell core type pouring method |
| CN109226696B (en) * | 2018-11-13 | 2024-04-12 | 黄山中发耐磨材料科技股份有限公司 | Sand shell core type pouring box |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: HUANGSHAN ZHONGFA WEAR RESISTANT MATERIAL CO., LTD Free format text: FORMER OWNER: HUANGSHAN TAIXIN WEAR RESISTANT MATERIAL CO., LTD. Effective date: 20150902 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150902 Address after: 245700 Mount Huangshan Industrial Park, Anhui, Huangshan City Patentee after: HUANGSHAN ZHONGFA WEAR RESISTANT MATERIAL CO.,LTD. Address before: 245700 Industrial Park, Mount Huangshan District, Anhui, Huangshan City Patentee before: HUANGSHAN TAIXIN WEAR RESISTANT MATERIAL Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 245700 Mount Huangshan Industrial Park in Huangshan City, Anhui Patentee after: Huangshan Zhongfa wear resistant material technology Co.,Ltd. Address before: 245700 Mount Huangshan Industrial Park in Huangshan City, Anhui Patentee before: HUANGSHAN ZHONGFA WEAR RESISTANT MATERIAL CO.,LTD. |
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| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140219 |
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| CX01 | Expiry of patent term |