CN102266913A - Vacuum casting box - Google Patents
Vacuum casting box Download PDFInfo
- Publication number
- CN102266913A CN102266913A CN201110216300XA CN201110216300A CN102266913A CN 102266913 A CN102266913 A CN 102266913A CN 201110216300X A CN201110216300X A CN 201110216300XA CN 201110216300 A CN201110216300 A CN 201110216300A CN 102266913 A CN102266913 A CN 102266913A
- Authority
- CN
- China
- Prior art keywords
- sandbox
- vacuum
- mould
- vavuum pump
- circuit
- 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.)
- Pending
Links
Images
Landscapes
- Control Of Fluid Pressure (AREA)
Abstract
The invention discloses a vacuum casting box, which comprises a sand box and a mould, wherein vacuum cavities are formed in the sand box and the mould; ventilating holes are formed in the inner wall of the sand box and in the rim and the middle of the mould; the ventilating holes are communicated with the corresponding vacuum cavities; vacuumizing openings are formed on the sand box and the mould; a check valve is arranged in the vacuumizing opening of the sand box; a vacuum pump is arranged on the outer wall of the sand box; and the vacuum pump of the sand box is connected with the vacuumizing opening of the sand box in a sealing manner. The vacuum casting box has a simple structure and low cost, is convenient to maintain, can be configured flexibly and can guarantee negative pressure required by each sand box and is applicable to vacuum casting.
Description
Technical field
The present invention relates to casting field, particularly relate to a kind of vacuum pressing and casting case.
Background technology
Characteristics such as before the present invention proposed, vacuum pressing and casting had the easy molding of moulding, and casting accuracy height, mold materials require low and the life-span is long, and the mobile property of molten metal is good, but have following shortcoming:
1, because general vacuum system has only a vavuum pump, so the vacuum pressing and casting case on all production lines all will be connected with this vavuum pump by pipeline, and general production line is all bigger, therefore the pipeline of required layout is very many and complicated on production line, like this, improve cost, and safeguarded very inconvenience;
2, because the vacuum pressing and casting case on the production line all provides negative pressure by a vavuum pump, so the power of vavuum pump is bigger, simultaneously, the pipeline of the required layout of all vacuum pressing and casting casees is very many, negative pressure line loss on the pipeline is bigger like this, further improved the power of vavuum pump, in addition, pipeline the crack can occur after using a period of time, cause leaking negative pressure, like this, for guaranteeing in the vacuum pressing and casting case enough negative pressure are arranged, need further improve the power of vavuum pump, in sum, employed vavuum pump is very big in the vacuum system, has improved cost, and noise is big;
3, in a single day vacuum system is after use a period of time, and the crack can appear in pipeline, like this, can not guarantee the negative pressure that each vacuum pressing and casting case is required on the one hand, and is complicated because pipeline is many on the other hand, so the crack occurs, safeguards very inconvenience.
Summary of the invention
The objective of the invention is provides a kind of cost low in order to overcome the deficiency of above-mentioned background technology, and noise is little, easy to maintenance and can guarantee the vacuum pressing and casting case of the required negative pressure of each vacuum pressing and casting case.
In order to realize above purpose, a kind of vacuum pressing and casting case provided by the invention, comprise: sandbox and mould, be equipped with vacuum chamber in sandbox and the mould, the inwall of described sandbox and the edge of mould and middle part are provided with air-vent, this air-vent communicates with each self-corresponding vacuum chamber, be equipped with a vacuum orifice on described sandbox and the mould, wherein, also be provided with check valve in the vacuum orifice of sandbox, described sandbox outer wall is provided with vavuum pump, and the vavuum pump of this sandbox and the vacuum orifice of described sandbox are tightly connected.
In the such scheme, be provided with pressure sensor in the vacuum chamber of described sandbox, the sandbox outer wall is provided with controller, this controller links to each other with the vavuum pump of pressure sensor and sandbox respectively, this pressure sensor is a vacuum detected pressures sensor, be used to detect the vacuum in the sandbox vacuum chamber, when the vacuum in the sandbox vacuum chamber less than when setting value, controller control vavuum pump work (vacuumizing), when the vacuum in the sandbox vacuum chamber reached setting value, controller control vavuum pump quit work, like this, guarantee the vacuum in the sandbox vacuum chamber on the one hand, saved the energy on the other hand.
In the such scheme, the outer wall of described mould is provided with vavuum pump, and the vavuum pump of this mould and the vacuum orifice of mould are tightly connected, and the vavuum pump on this mould outer wall is used to extract the interior air of vacuum chamber of mould, to form negative pressure, also be used for simultaneously in the vacuum chamber of mould, blowing air.
In the such scheme, the position that described sandbox inwall is positioned at the air-vent of sandbox is provided with first screen pack, like this, can prevent effectively that sand from entering in the vacuum chamber of sandbox.
In the such scheme, be provided with second screen pack in the vacuum orifice of described sandbox, like this, prevent that further sand from entering the vacuum orifice of sandbox, the prevention sand enters, damages vavuum pump.
The present invention is compared with the prior art, show that fully its superiority is: on the one hand, powerful vavuum pump is decomposed into a plurality of low power vavuum pumps directly provides negative pressure for each sandbox, reduced the quantity of the pipeline that is connected between vavuum pump and the sandbox, reduced cost, safeguard more convenient, flexible configuration; On the other hand, a plurality of low power vavuum pumps directly and each sandbox be tightly connected, reduced the use amount of pipeline, and then reduced the negative pressure line loss amount on the pipeline, easy to maintenance, also reduced the power of vavuum pump, thereby reduced cost and noise; On the one hand, on sandbox, add pressure sensor and controller again, both guaranteed the negative pressure that sandbox is required, saved the energy again, thereby reduced cost; At last, first screen pack that adds and second screen pack have prevented that effectively sand from entering the vacuum chamber and the vacuum orifice of sandbox, protected vavuum pump effectively.
Description of drawings
Fig. 1 is the structural representation of sandbox of the present invention;
Fig. 2 is the structural representation of mould of the present invention;
Fig. 3 is the theory diagram of controller of the present invention.
Among the figure, sandbox 1, mould 2, the vacuum chamber 3a of sandbox, the vacuum chamber 3b of mould, the air-vent 4a of sandbox, the air-vent 4b of mould, the vacuum orifice 5a of sandbox, the vacuum orifice 5b of mould, check valve 6, the vavuum pump 7a of sandbox, the vavuum pump 7b of mould, pressure sensor 8, controller 9, the first screen packs 10, second screen pack 11, sand 12.
The specific embodiment
The present invention is described in further detail below in conjunction with drawings and Examples, but this embodiment should not be construed as limitation of the present invention.
As shown in Figure 1, present embodiment provides a kind of vacuum pressing and casting case, comprise: sandbox 1 and mould 2, be equipped with vacuum chamber in sandbox 1 and the mould 2, the edge and the middle part of the inwall of described sandbox 1 and mould 2 are provided with air-vent, this air-vent communicates with each self-corresponding vacuum chamber, be equipped with a vacuum orifice on described sandbox 1 and the mould 2, wherein, also be provided with check valve 6 in the vacuum orifice 5a of sandbox, the position of the vacuum orifice 5a correspondence of described sandbox 1 outer wall cope is provided with the vavuum pump 7a of sandbox, and the direct vacuum orifice 5a with described sandbox of the vavuum pump 7a of this sandbox is tightly connected.The described power that is used for the vavuum pump 7a of sandbox can be chosen according to actual needs, and its installation site also can be designed according to actual condition, can certainly not be installed on the sandbox 1, and at this moment, the vavuum pump 7a of this sandbox is tightly connected with corresponding vacuum orifice by pipeline.
Be provided with pressure sensor 8 in the vacuum chamber 3a of above-mentioned sandbox, sandbox 1 outer wall is provided with controller 9, this controller 9 links to each other with the vavuum pump 7a of pressure sensor 8 and sandbox respectively, this pressure sensor 8 is a vacuum detected pressures sensor, be used to detect the interior vacuum of vacuum chamber 3a of sandbox, when the vacuum in the vacuum chamber 3a of sandbox less than when setting value, the vavuum pump 7a work (vacuumizing) of controller 9 control sandboxes, when the vacuum in the vacuum chamber 3a of sandbox reaches setting value, the vavuum pump 7a of controller 9 control sandboxes quits work, like this, guarantee the interior vacuum of vacuum chamber 3a of sandbox on the one hand, saved the energy on the other hand.The quantity of described pressure sensor 8 and installation site all can be designed according to actual needs, and the installation site of described controller 9 also according to the actual condition design, can certainly be installed the controller 9 on each sandbox 1 concentratedly on a control panel, is convenient to operation.
The position of the vacuum orifice 5b correspondence of mould is provided with the vavuum pump 7b of mould on above-mentioned mould 2 outer walls, the vavuum pump 7b of this mould vacuum orifice 5b direct and mould is tightly connected, the vavuum pump 7b of this mould is used to extract the interior air of vacuum chamber 3b of mould, to form negative pressure, also be used for simultaneously in the vacuum chamber 3b of mould, blowing air.The described power that is used for the vavuum pump 7b of mould can be chosen according to actual needs, and its installation site also can be designed according to actual condition, can certainly not be installed on the mould 2, and at this moment, the vavuum pump 7b of this mould is tightly connected with corresponding vacuum orifice by pipeline.
The position that above-mentioned sandbox 1 inwall is positioned at the air-vent 4a of sandbox is provided with first screen pack 10, like this, can prevent effectively that sand 12 from entering in the vacuum chamber 3a of sandbox.Be provided with second screen pack 11 in the vacuum orifice 5a of described sandbox, like this, prevent that further sand 12 from entering the vacuum orifice 5a of sandbox, the prevention sand enters, damages vavuum pump 7.The quantity and the installation site of described first screen pack 10 and second screen pack 11 all can be designed according to actual needs.
Described controller 9 comprises A/D converter, the set-point circuit, comparison circuit, the Error processing circuit, PID regulating circuit and vavuum pump drive circuit, wherein the set-point circuit is used for given vacuum chamber setting negative pressure value, A/D converter is used to connect described pressure sensor 8, and the analogue data that pressure sensor 8 is exported is converted to numerical data, the operation principle of described controller 9 is: the negative pressure value that comparison circuit is set the data value and the set-point circuit of the pressure sensor 8 of input compares, result relatively exports to the Error processing circuit and carries out the data processing, the Error processing circuit is exported to the PID regulating circuit with result (being to need to increase negative pressure or keep-up pressure), (because of vavuum pump itself is exactly a motor to the PID regulating circuit with the concrete numerical value that specifically need increase negative pressure or stop, so the signal of PID regulating circuit output just can carry out speed governing to motor, and the pressure that reaches real-time maintenance vacuum chamber is consistent with the setting negative pressure value, guarantee castability) to the vavuum pump drive circuit, by vavuum pump drive circuit control vavuum pump action (start vavuum pump when increasing negative pressure, stop vavuum pump when keep-uping pressure).
The course of work of the present invention is as follows:
1, the much the same plastic sheeting of top surface area size of getting a size and described mould 2 is put on the mould 2, and it is thick that this plastic sheeting is generally 0.02～0.05mm, has the good thermoplastic percentage elongation;
2, plastic sheeting is heated to soft state, the vavuum pump 7b of mould starts working then, and suction acts on softening plastic sheeting by the air-vent 4b of mould, and this film and mould 2 are closely pasted;
3, the vavuum pump 7b of mould works on, and sandbox 1 is placed on around the mould 2, and is positioned at above the above-mentioned plastic sheeting;
4, in sandbox 1, be full of the dry sand of adhesive-free, and make sand obtain maximal density formation mo(u)ld top half by vibrations equipment;
5, be covered with layer of plastic film (need not be heated softening) again at the top of above-mentioned mo(u)ld top half, and pouring basin linked to each other with sprue by manual;
6, the vavuum pump 7a of sandbox starts working, sandbox 1 is vacuumized, under the effect of atmospheric pressure, described mo(u)ld top half pressed more consolidation form casting mold, the vavuum pump 7b reverse operation of mould then, in the vacuum chamber 3b of mould, inflate, make to paste the bottom surface that is adsorbed on described mo(u)ld top half at the plastic sheeting of mould 2 upper surfaces, then mo(u)ld top half and mould 2 are separated molding;
7, the production mo(u)ld bottom half that uses the same method, this mo(u)ld bottom half only need be before overlay film be wipeed sand off and get final product, then with mo(u)ld top half and mo(u)ld bottom half mould assembly, prepare to pour into a mould;
8, must guarantee the interior vacuum of vacuum chamber 3a of sandbox in the casting process, after the foundry goods cooling, remove vacuum, sand directly falls with foundry goods, and sand cooling back retrieval system recycles.
In the step 6,7 and 8 of said process, pressure sensor 8 is in running order always, when the vacuum in the vacuum chamber 3a of sandbox less than when setting value, the vavuum pump 7a work (vacuumizing) of controller 9 control sandboxes, when the vacuum in the vacuum chamber 3a of sandbox reached setting value, the vavuum pump 7a of controller 9 control sandboxes quit work, like this, guarantee the interior vacuum of vacuum chamber 3a of sandbox on the one hand, saved the energy on the other hand.
Claims (6)
1. vacuum pressing and casting case, comprise: sandbox and mould, be equipped with vacuum chamber in sandbox and the mould, the inwall of described sandbox and the edge of mould and middle part are provided with air-vent, and this air-vent communicates with each self-corresponding vacuum chamber, be equipped with a vacuum orifice on described sandbox and the mould, wherein, also be provided with check valve in the vacuum orifice of sandbox, it is characterized in that, described sandbox outer wall is provided with vavuum pump, and the vavuum pump of this sandbox and the vacuum orifice of described sandbox are tightly connected.
2. a kind of vacuum pressing and casting case as claimed in claim 1 is characterized in that: be provided with pressure sensor in the vacuum chamber of described sandbox, the sandbox outer wall is provided with controller, and this controller links to each other with the vavuum pump of pressure sensor and sandbox respectively.
3. a kind of vacuum pressing and casting case as claimed in claim 1, it is characterized in that: the outer wall of described mould is provided with vavuum pump, and the vavuum pump of this mould and the vacuum orifice of mould are tightly connected.
4. a kind of vacuum pressing and casting case as claimed in claim 1 or 2 is characterized in that: the position that described sandbox inwall is positioned at the air-vent of sandbox is provided with first screen pack.
5. a kind of vacuum pressing and casting case as claimed in claim 1 or 2 is characterized in that: be provided with second screen pack in the vacuum orifice of described sandbox.
6. a kind of vacuum pressing and casting case as claimed in claim 2 is characterized in that: described controller comprises A/D converter, set-point circuit, comparison circuit, Error processing circuit, PID regulating circuit and vavuum pump drive circuit:
Set-point circuit: be used for given vacuum chamber and set negative pressure value, be connected with described comparison circuit input;
A/D converter: be used to connect described pressure sensor, and the analogue data of pressure sensor 8 outputs is converted to numerical data, its output is connected with described comparison circuit input;
Comparison circuit: the negative pressure value that data value and the set-point circuit of the pressure sensor of input are set compares, and result relatively exports to the Error processing circuit and carries out the data processing;
Error processing circuit: result is exported to the PID regulating circuit;
PID regulating circuit: give the vavuum pump drive circuit with the concrete numerical value that specifically need increase negative pressure or stop;
Vavuum pump drive circuit: control vavuum pump action.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110216300XA CN102266913A (en) | 2011-07-29 | 2011-07-29 | Vacuum casting box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110216300XA CN102266913A (en) | 2011-07-29 | 2011-07-29 | Vacuum casting box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102266913A true CN102266913A (en) | 2011-12-07 |
Family
ID=45049479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110216300XA Pending CN102266913A (en) | 2011-07-29 | 2011-07-29 | Vacuum casting box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102266913A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104525857A (en) * | 2014-12-15 | 2015-04-22 | 滁州金诺实业有限公司 | Upper box structure for refrigerator inner liner mold on the basis of V-process casting |
| 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 |
| CN108620543A (en) * | 2018-07-06 | 2018-10-09 | 湖州吉弘机械有限公司 | A kind of casting Foundry quartz sand case |
| CN113680966A (en) * | 2021-09-03 | 2021-11-23 | 洛阳市钢峰工程机械制造有限公司 | Casting method of sheet-shaped part |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1089372A (en) * | 1993-07-14 | 1994-07-13 | 核工业理化工程研究院 | Material mass flow controller |
| CN2316069Y (en) * | 1997-12-03 | 1999-04-28 | 辽宁工学院 | Top-pulling type vanishing mould foundry moulding box |
| CN101093166A (en) * | 2007-08-10 | 2007-12-26 | 北京航空航天大学 | Device for controlling average wavelength of light source in broad spectrum based on monitoring detector |
| CN201455197U (en) * | 2009-07-17 | 2010-05-12 | 泊头市青峰机械有限公司 | Sand box for vacuum lost foam large-sized complex casting |
| CN101722298A (en) * | 2009-11-12 | 2010-06-09 | 薛立华 | Vacuum sealed molding casting method production process for front bridge and rear bridge of automobile |
| CN101954460A (en) * | 2010-11-12 | 2011-01-26 | 侯松发 | Special movable air chamber sand box of negative pressure molding process |
-
2011
- 2011-07-29 CN CN201110216300XA patent/CN102266913A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1089372A (en) * | 1993-07-14 | 1994-07-13 | 核工业理化工程研究院 | Material mass flow controller |
| CN2316069Y (en) * | 1997-12-03 | 1999-04-28 | 辽宁工学院 | Top-pulling type vanishing mould foundry moulding box |
| CN101093166A (en) * | 2007-08-10 | 2007-12-26 | 北京航空航天大学 | Device for controlling average wavelength of light source in broad spectrum based on monitoring detector |
| CN201455197U (en) * | 2009-07-17 | 2010-05-12 | 泊头市青峰机械有限公司 | Sand box for vacuum lost foam large-sized complex casting |
| CN101722298A (en) * | 2009-11-12 | 2010-06-09 | 薛立华 | Vacuum sealed molding casting method production process for front bridge and rear bridge of automobile |
| CN101954460A (en) * | 2010-11-12 | 2011-01-26 | 侯松发 | Special movable air chamber sand box of negative pressure molding process |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104525857A (en) * | 2014-12-15 | 2015-04-22 | 滁州金诺实业有限公司 | Upper box structure for refrigerator inner liner mold on the basis of V-process casting |
| CN104525857B (en) * | 2014-12-15 | 2016-07-13 | 滁州金诺实业有限公司 | Inner container of icebox mould box structure is cast based on V method |
| 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 |
| CN108620543A (en) * | 2018-07-06 | 2018-10-09 | 湖州吉弘机械有限公司 | A kind of casting Foundry quartz sand case |
| CN113680966A (en) * | 2021-09-03 | 2021-11-23 | 洛阳市钢峰工程机械制造有限公司 | Casting method of sheet-shaped part |
| CN113680966B (en) * | 2021-09-03 | 2022-12-16 | 洛阳市钢峰工程机械制造有限公司 | Casting method of sheet-shaped part |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102266913A (en) | Vacuum casting box | |
| CN103658525B (en) | A kind of V method mould casting electronic appliance mold strand | |
| CN205967308U (en) | Lost pattern casting special shape mo(u)lding box disappears with six air chambers | |
| CN201613331U (en) | Small V-process production line | |
| CN1701874A (en) | Vacuum negative pressure casting process of foam die casting piece | |
| CN203495140U (en) | Negative-pressure casting system of coated sand mould | |
| CN205236978U (en) | Bottom bleeder vacuum disappearance sand case | |
| CN101623745B (en) | Process method of in-series pouring multiple lost moulds in one box | |
| CN203371004U (en) | Anti-deformation slag inclusion casting device | |
| CN103878312A (en) | Novel casting and pouring system for conical support casting of wind driven generator | |
| CN202278173U (en) | Case for vacuum casting | |
| CN205056985U (en) | Evacuated die -casting process aided forming system | |
| CN114603088B (en) | Modeling process for efficiently producing flywheel plate of engine | |
| CN102689412A (en) | Mould runner structure and rubber mould with same | |
| CN205818313U (en) | A kind of automobile die automatic blanking device | |
| CN102689409A (en) | Mould runner structure and rubber mould with same | |
| CN109047682B (en) | Foundry casting die assembly | |
| CN206356554U (en) | It is mechanically fixed the die casting of seat | |
| CN203155943U (en) | Water-cooled casting molding device utilizing evanescent mode | |
| CN203426367U (en) | V-process cast foundry sand recovery device | |
| CN103100689B (en) | A kind of mould structure of the core elder generation demoulding its top feed of lampshade | |
| CN104690227A (en) | Evanescent mould casting process capable of preventing deformation | |
| CN202572864U (en) | Mould runner structure and rubber mould with the same | |
| CN207564848U (en) | A kind of workbench for mould machine processing | |
| CN214188327U (en) | Environment-friendly lunch box injection molding precision temperature control device and environment-friendly lunch box injection molding machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20111207 |