CN201229502Y - Curing agent control instrument having double end metering pump - Google Patents
Curing agent control instrument having double end metering pump Download PDFInfo
- Publication number
- CN201229502Y CN201229502Y CNU200820127374XU CN200820127374U CN201229502Y CN 201229502 Y CN201229502 Y CN 201229502Y CN U200820127374X U CNU200820127374X U CN U200820127374XU CN 200820127374 U CN200820127374 U CN 200820127374U CN 201229502 Y CN201229502 Y CN 201229502Y
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- China
- Prior art keywords
- hardening agent
- volume pump
- double end
- pump
- control system
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- 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.)
- Expired - Lifetime
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- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model relates to a controller of hardener of a multihead metering pump, which comprises a pipe line, a control system, at least two hardener tanks and a metering pump which is respectively connected with the hardener tanks, a metering pump speed-adjusting gear which is electrically connected with the metering pump is connected with a control system, the output ends of the metering pump are all communicated with an input port of a mixing pipe line, an output port of the mixing pipeline is connected with a hardener adding port of a sand muller, the metering pump is the multihead metering pump, and the signal input end of the control system is connected with a sand temperature detecting device. The controller of hardener of the multihead metering pump can effectively reduce the impulse of liquid of the pipeline and has low manufacturing cost.
Description
Technical field
The utility model relates to the casting and molding apparatus field, a kind of specifically hardening agent proportioning controller with double end volume pump.
Background technology
At present, in for example using self-hardening furan resin sand moulding, coremaking casting process, for keeping certain curing rate, summer, acid number hardening agent during spring and autumn is used was used high acid value hardening agent (A type) winter with hanging down acid number hardening agent (Type B) usually.With the different frequent hardening agent of changing of season and temperature, often utilize the hardening agent controller to adjust the addition that in puddle mixer, adds A type and two kinds of hardening agent of Type B automatically, for fear of in process of production to obtain the hardening agent of different acid numbers.Liquid in hardening agent controller pipeline is owing to be subjected to the influence of factors such as discharge pump; in pipeline, form certain pulse through regular meeting; influence is carried and normal production; therefore need in pipeline, carry delivery side of pump that impact damper is set usually and reduce the pipeline pulse, make fluid flow stable.
The present impact damper that uses is that the bottom in its closed shell is provided with recessed to pipeline connection port and rubber-like diaphragm, when the liquid in the pipeline is in the pulse crest, fluid pressure rises, make the distortion of diaphragm generation elastic force, to the fovea superior song, thereby can be so that corresponding the reducing of fluid pressure in the pipeline, flow tends to be steady, simultaneously, the diaphragm of distortion just can be in being enclosed in housing, the air that is positioned at diaphragm top is exerted pressure, the volume of air just is compressed, gas pressure intensity increases, and along with liquid pulse in the pipeline changes to trough from crest, fluid pressure reduces gradually, and the acting force difference of air pressure and hydraulic pressure will make diaphragm be returned to original state, thereby plays the effect that slows down liquid pulse in the pipeline.But there is following shortcoming in the hardening agent controller that utilizes the sort buffer device to slow down fluid pressure: 1. this hardening agent controller must be installed impact damper at the downstream of rear pump pipeline in order to slow down fluid pressure, increased the number of components of equipment so undoubtedly, also just increased the physical damage rate of parts to a certain extent, increased the maintenance and the turnover rate of equipment, the maintenance cost of equipment is increased; 2. and the sort buffer device structure of using very complicated, to fit tightly between the edge of diaphragm and the inner walls, seal fully, otherwise can't realize buffer action, its difficulty of processing is big, the production cost height, the price that is to say the sort buffer device is very expensive, makes the equipment cost of integrally curing agent controller significantly increase.
The utility model content
For this reason, technical problem to be solved in the utility model is to provide a kind of and can effectively slows down pipeline liquid pulse, the hardening agent controller with double end volume pump that production cost is low.
For solving the problems of the technologies described above, the utility model is achieved through the following technical solutions:
A kind of comprise pipeline, control system, at least two hardening agent jars and respectively with the tank connected volume pump of described hardening agent, the volume pump arrangements for speed regulation that are electrically connected with described volume pump link to each other with described control system, described metering delivery side of pump all is communicated with the input port of a mixing duct, the delivery outlet of described mixing duct adds inlet with the hardening agent of puddle mixer and is connected, and described volume pump is the double end volume pump; The signal input part of described control system links to each other with sand temperature pick-up unit.
Above-mentioned hardening agent controller with double end volume pump, described sand temperature pick-up unit comprises the sand temperature sensor, described sand temperature sensor links to each other with described control system by temperature detecting unit.
Above-mentioned hardening agent controller with double end volume pump, the signal input part of described control system also is connected with pump detecting unit, Level Detection unit and puddle mixer detecting unit, the signal output part of described control system describedly has the hardening agent controller of double end volume pump and the interlocked control unit of described puddle mixer synchronous operation links to each other with being used to control, and the output terminal of described interlocked control unit links to each other with the puddle mixer control system with described volume pump arrangements for speed regulation.
Above-mentioned hardening agent controller with double end volume pump, described mixing duct is connected with the pressure gas input channel.
Above-mentioned hardening agent controller with double end volume pump, described volume pump arrangements for speed regulation are frequency converter.
Above-mentioned hardening agent controller with double end volume pump also comprises the filtrator that is arranged between described hardening agent jar and the described volume pump.
Above-mentioned hardening agent controller with double end volume pump, described double end volume pump is the double end diaphragm metering pump.
Above-mentioned hardening agent controller with double end volume pump also comprises the flow detector that is connected with described control system, and described flow detector is arranged in the described mixing duct.
Above-mentioned hardening agent controller with double end volume pump, described flow detector is a flowmeter.
Above-mentioned hardening agent controller with double end volume pump, described control system is connected with upper managing computer by repeater.
Technique scheme of the present utility model has the following advantages compared to existing technology: the hardening agent controller with double end volume pump that 1. the utility model provides, adopt the double end volume pump, utilize two pump head that the delivery rate of hardening agent liquid is compensated mutually, slow down the output pulse of liquid, make the output liquid stability of flow, thereby replaced the impact damper that traditional handicraft is used always fully, also just fundamentally thoroughly overcome prior art and used impact damper to slow down all deficiencies and the defective that liquid pulse brings; 2. the hardening agent controller that the utility model provides with double end volume pump, because the double end volume pump that is adopted is the existing equipment of using always, very extensive, common, and need not to be provided with again miscellaneous part, can effectively slow down liquid pulse, this just makes the equipment cost of whole hardening agent controller significantly reduce; 3. the hardening agent controller that the utility model provides with double end volume pump, because the double end volume pump that is adopted is an equipment that use always, technology maturation, utilize two pump head that the delivery rate of hardening agent liquid is compensated mutually, can slow down the hardening agent liquid pulse in the pipeline effectively, make the flow of liquid steady, stablize, pipeline and the miscellaneous part that is arranged on the pipeline are played a protective role, guarantee the serviceable life of pipeline and miscellaneous part; 4. the hardening agent controller that the utility model provides with double end volume pump, thereby connecting the pressure gas input channel in the delivery outlet position of mixing duct makes the delivery outlet of mixing duct feed pressurized air, to increase the fluid pressure of hardening agent, make mulling more even, thereby realize adjusting the hardening agent fluid pressure.
Description of drawings
For the easier quilt of content of the present utility model is clearly understood, according to specific embodiment of the utility model also in conjunction with the accompanying drawings, the utility model is described in further detail, wherein below
Fig. 1 is a process flow diagram of the present utility model;
Fig. 2 is a principle process synoptic diagram of the present utility model;
Fig. 3 is the synoptic diagram of double end volume pump in the utility model.
Reference numeral is expressed as among the figure: 1-hardening agent jar, 2-stop valve, 3-Y type filter, 4-double end volume pump, 41-liquid inlet, 42-liquid outlet, 5-mixer, 6-liquid level gauge, 7-intelligent flow meter, 8-air-operated solenoid valve, 9-sand temperature sensor
Embodiment
As shown in Figure 1, the hardening agent controller with double end volume pump of the present utility model comprises pipeline, control system, two hardening agent jars 1, stop valve 2, filtrator, double end volume pump 4 and liquid level gauges 6.
Described hardening agent jar 1 is used to hold hardening agent, and two described hardening agent jars 1 are equipped with A hardening agent (high acid value hardening agent) and B hardening agent (low acid number hardening agent) respectively.Described stop valve 2 connects the hardening agent delivery outlet of described hardening agent jar 1, is used to control the ON/OFF of hardening agent liquid, is convenient to overhaul of the equipments.Described filtrator is connected with the output terminal of described stop valve 2, is used for filtering the impurity of hardening agent, guarantees the quality of hardening agent, and described in the present embodiment filtrator is a y-type filter 3.
Described double end volume pump 4 is connected with the output terminal of described y-type filter 3, and two described double end volume pumps 4 are quantitatively exported two kinds of hardening agent of A, B respectively, and in the present embodiment, described double end volume pump 4 is the double end diaphragm metering pump.Described double end diaphragm metering pump is a usual means of the prior art, and its basic structure can owing to be not invention main points of the present utility model, therefore repeat no more referring to the bull pump among the Chinese patent literature CN200952460Y.Described double end volume pump 4 utilizes two pump head that the delivery rate of hardening agent liquid is compensated mutually, slows down the output pulse of liquid, makes output liquid be continuity and stability of flow substantially.Described double end volume pump 4 comprises by motor, reducer casing, eccentric bushing, the actuating unit of bearing and impeller-hub composition with Baltimore groove, two ends at described impeller-hub are equipped with barrier film, and described actuating unit drives its operate as normal for described double end volume pump 4 provides power.Described double end volume pump 4 has two identical pump chambers, and each described pump chamber has included pump head, upper check valve, following non-return valve and check ball.
Details are as follows for the concrete principle of work of described double end volume pump 4: drive described eccentric bushing and described bearing is made circle swing in the described Baltimore groove of described impeller-hub by the output shaft of described motor, make described impeller-hub do reciprocal alternating movement in the pump housing; When described impeller-hub is pushed to opposite side pump chamber (hereinafter referred to as the Y side) by a side pump chamber (hereinafter referred to as the X side), as shown in Figure 3, under the thrust of described barrier film, the described pump head cavity that is positioned at Y side pump chamber will produce normal pressure, make the described non-return valve down sealing of Y side, flow backwards with prevention hardening agent liquid, and described upper check valve is opened under the effect of this normal pressure, the hardening agent in the described pump chamber is discharged from liquid outlet 42; Meanwhile, under the pulling force effect of described barrier film, the described pump head cavity that is positioned at X side pump chamber will produce negative pressure, and the described non-return valve down of X side is opened, suck the hardening agent liquid that filters through described y-type filter 3 by liquid inlet 41, and only add valve closure on X side described.The described liquid outlet 42 common liquid that connect 5, two described pump head outputs of a mixer of two described pump chambers mix in described mixer 5, and then make hardening agent flow direction downstream pipeline again.And the like, the every to-and-fro movement of described impeller-hub once, described barrier film just can make the interior described pump head cavity of the described pump chamber of X, Y side produce malleation or negative pressure, so that two described pump head alternations of X, Y side, the output certain amount of fluid, owing to the delivery rate of two described pump heads to hardening agent liquid carries out alternately compensating mutually, and in described mixer 5, mix, flow to the downstream pipeline again, make and need not to be provided with under the situation of miscellaneous parts such as impact damper, can slow down the output pulse of liquid, make the delivery rate of hardening agent liquid keep stable.
Each described double end volume pump 4 also further is connected with the volume pump arrangements for speed regulation, the described volume pump arrangements for speed regulation that are electrically connected with described double end volume pump 4 link to each other with described control system, and described control system is by described volume pump arrangements for speed regulation connection and control described double end volume pump 4.Described volume pump arrangements for speed regulation are used for control, adjust described double end volume pump 4, thereby regulate the output quantity of hardening agent liquid, described in the present embodiment volume pump arrangements for speed regulation are frequency converter, and described frequency converter is used to control, adjust the frequency of described double end volume pump 4.Certainly, in other embodiments, described volume pump arrangements for speed regulation also can be direct current modulator etc.In addition, on each described hardening agent jar 1, be equipped with liquid level gauge 6, be used to show the hardening agent liquid level in the described hardening agent jar 1, avoid because the interior hardening agent of described hardening agent jar 1 is very few even use up the generation that causes the antiquated sand type.
Please again referring to shown in Figure 1, the output terminal of two described double end volume pumps 4 connects mixing duct by threeway, and the hardening agent that described mixing duct connects puddle mixer adds inlet.Described mixing duct is provided with flow detector, and described in the present embodiment flow detector is a flowmeter, is intelligent flow meter 7 furtherly, and described intelligent flow meter 7 is used to measure the total flow of A, two kinds of hardening agent of B.The output terminal of described intelligent flow meter 7 is connected with solenoid valve, described in the present embodiment solenoid valve is an air-operated solenoid valve 8, described air-operated solenoid valve 8 is positioned at the delivery outlet position of described mixing duct, make described mixing duct be communicated with the pressure gas input channel, be used for adding inlet position feeding pressurized air to the described hardening agent of described puddle mixer, to increase the fluid pressure of hardening agent, make mulling more even, the on/off of described air-operated solenoid valve 8 is controlled by described control system, thereby realizes the adjusting to the hardening agent fluid pressure.Described hardening agent controller also comprises the sand temperature sensor 9 that is used to measure the sand temperature.
Described control system is connected with upper managing computer by repeater, sends/receive various signals, the communication between realization and the described upper managing computer.Described repeater is a kind of device that connects network line, is used for two-way forwarding physical signalling between two network nodes.Described upper managing computer is that a kind of people of making can directly send the computing machine of controlling order and then the described hardening agent controller operation of management control, can show on its screen that various signals change, and generally adopt PC (Personal Computer, personal computer).Described control system also is connected with touch-screen, carries out control operation with the handled easily personnel.Described control system comprises the PLC control module, and the temperature detecting unit, pump detecting unit, Level Detection unit and the puddle mixer detecting unit that link to each other with the signal input part of described PLC control module, and the interlocked control unit that links to each other with the signal output part of described PLC control module.Described temperature detecting unit is connected with described sand temperature sensor 9, thereby obtains temperature signal; Whether described pump detecting unit connects the described double end volume pump 4 of control, be used to monitor described double end volume pump 4 and move normally; Described Level Detection unit connects the described liquid level gauge 6 of control, is used to monitor the liquid level level in the described hardening agent jar 1; Whether described puddle mixer detecting unit is connected with described puddle mixer, be used to monitor described puddle mixer and move normally.Described interlocked control unit is used to control described hardening agent controller and described puddle mixer synchronous operation, and described interlocked control unit can be relay or other circuit arrangements.The output terminal of described interlocked control unit and described A pump frequency conversion device, B pump frequency conversion device links to each other with the puddle mixer control system, and then the startup by described A volume pump of described Frequency Converter Control and B volume pump/stop, control the startup of described puddle mixer/stop by described puddle mixer control system, above-mentioned control can be adopted and cut off motor circuit or other control modes, make that described hardening agent controller and described puddle mixer can synchronous operations and report to the police, in time fix a breakdown with alert and plant maintenance personnel, thereby assurance production safety, reduce the sand mold rejection rate, guarantee production efficiency.
As shown in Figure 2, details are as follows for the principle process of the utility model hardening agent controller: detect the sand temperature by described sand temperature sensor, send temperature signal to described temperature detecting unit, and then send described PLC control module to; Described PLC control module carries out processing data information to it, and itself and predefined process curve figure analyzed comparison, determine two kinds of hardening agent of A, B addition separately, send control signal by described PLC control module to A, B pump frequency conversion device again, the frequency of control A volume pump and B volume pump, thereby realized adjustment, reached the best proportioning of hardening agent, guaranteed to solidify quality the hardening agent output quantity.Monitor A respectively by described pump detecting unit and described puddle mixer detecting unit, whether two volume pumps of B and described puddle mixer move normally, and whether be lower than warning value by the liquid level level in the described hardening agent jar of described Level Detection unit monitors 1, in case find described A, two volume pumps of B, described puddle mixer operation exception, when perhaps described liquid level gauge shows that the hardening agent liquid in the described hardening agent jar is very few and is lower than warning value, the said pump detecting unit, Level Detection unit or puddle mixer detecting unit just in time send to abnormal signal described PLC control module, send control signal by described PLC control module to described interlocked control unit, send control signal to described frequency converter and described puddle mixer control system respectively by described interlocked control unit again, make described hardening agent controller and described puddle mixer out of service and report to the police.
Details are as follows for the concrete course of work of the described hardening agent controller that the utility model provides:
1, at first, add A hardening agent and B hardening agent respectively in two described hardening agent jars 1, press the power knob of described hardening agent controller then, its power light will light, otherwise device fails.
2, by the operation touch-screen, select curing rate according to concrete job requirement.
3, by the described touch-screen of operation, select equipment running status, manual operation.
4, by the described touch-screen of operation, two volume pumps of A, B are started working, if occur unusually, then devices illustrated breaks down, and answers emergency stop, cuts off the electricity supply, and checks fault.
5, in the course of the work, can adjust the curing rate gear arbitrarily.
6, end-of-job, the closing device power supply is shut down described hardening agent controller.
Obviously, the foregoing description only is for example clearly is described, and is not the qualification to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all embodiments.And conspicuous variation of being extended out thus or change still are among the protection domain of the utility model creation.
Claims (10)
1. hardening agent controller with double end volume pump, it is characterized in that: comprise pipeline, control system, at least two hardening agent jars and respectively with the tank connected volume pump of described hardening agent, the volume pump arrangements for speed regulation that are electrically connected with described volume pump link to each other with described control system, described metering delivery side of pump all is communicated with the input port of a mixing duct, the delivery outlet of described mixing duct adds inlet with the hardening agent of puddle mixer and is connected, and described volume pump is the double end volume pump; The signal input part of described control system links to each other with sand temperature pick-up unit.
2. according to the described hardening agent controller with double end volume pump of claim 1, it is characterized in that: described sand temperature pick-up unit comprises the sand temperature sensor, and described sand temperature sensor links to each other with described control system by temperature detecting unit.
3. according to claim 1 or 2 described hardening agent controllers with double end volume pump, it is characterized in that: the signal input part of described control system also is connected with pump detecting unit, Level Detection unit and puddle mixer detecting unit, the signal output part of described control system describedly has the hardening agent controller of double end volume pump and the interlocked control unit of described puddle mixer synchronous operation links to each other with being used to control, and the output terminal of described interlocked control unit links to each other with the puddle mixer control system with described volume pump arrangements for speed regulation.
4. according to claim 1 or 2 described hardening agent controllers with double end volume pump, it is characterized in that: described mixing duct is connected with the pressure gas input channel.
5. according to claim 1 or 2 described hardening agent controllers with double end volume pump, it is characterized in that: described volume pump arrangements for speed regulation are frequency converter.
6. according to claim 1 or 2 described hardening agent controllers, it is characterized in that: also comprise the filtrator that is arranged between described hardening agent jar and the described volume pump with double end volume pump.
7. according to claim 1 or 2 described hardening agent controllers with double end volume pump, it is characterized in that: described double end volume pump is the double end diaphragm metering pump.
8. according to the described hardening agent controller with double end volume pump of claim 1, it is characterized in that: also comprise the flow detector that is connected with described control system, described flow detector is arranged in the described mixing duct.
9. the described according to Claim 8 hardening agent controller with double end volume pump is characterized in that: described flow detector is a flowmeter.
10. according to claim 1 or 2 described hardening agent controllers with double end volume pump, it is characterized in that: described control system is connected with upper managing computer by repeater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820127374XU CN201229502Y (en) | 2007-12-29 | 2008-07-28 | Curing agent control instrument having double end metering pump |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200720310875 | 2007-12-29 | ||
| CN200720310875.7 | 2007-12-29 | ||
| CNU200820127374XU CN201229502Y (en) | 2007-12-29 | 2008-07-28 | Curing agent control instrument having double end metering pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201229502Y true CN201229502Y (en) | 2009-04-29 |
Family
ID=40596798
Family Applications (5)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201273769U Expired - Lifetime CN201226108Y (en) | 2007-12-29 | 2008-07-28 | Automatic control instrument for firming agent |
| CNU2008201273788U Expired - Lifetime CN201226107Y (en) | 2007-12-29 | 2008-07-28 | Automatic control device for firming agent |
| CNU200820127374XU Expired - Lifetime CN201229502Y (en) | 2007-12-29 | 2008-07-28 | Curing agent control instrument having double end metering pump |
| CNU2008201273754U Expired - Lifetime CN201223921Y (en) | 2007-12-29 | 2008-07-28 | Curing agent control instrument with buffer |
| CNU2008201324281U Expired - Lifetime CN201259637Y (en) | 2007-12-29 | 2008-08-13 | Caking agent-curing agent mixture ratio control instrument for casting |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201273769U Expired - Lifetime CN201226108Y (en) | 2007-12-29 | 2008-07-28 | Automatic control instrument for firming agent |
| CNU2008201273788U Expired - Lifetime CN201226107Y (en) | 2007-12-29 | 2008-07-28 | Automatic control device for firming agent |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201273754U Expired - Lifetime CN201223921Y (en) | 2007-12-29 | 2008-07-28 | Curing agent control instrument with buffer |
| CNU2008201324281U Expired - Lifetime CN201259637Y (en) | 2007-12-29 | 2008-08-13 | Caking agent-curing agent mixture ratio control instrument for casting |
Country Status (1)
| Country | Link |
|---|---|
| CN (5) | CN201226108Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101722273B (en) * | 2009-11-12 | 2011-04-13 | 无锡锡南铸造机械有限公司 | Foundry sand charging device |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103785792B (en) * | 2014-03-07 | 2015-09-16 | 孙晓宇 | A kind of continuous clay sand mixing machine |
| CN106311971A (en) * | 2015-06-30 | 2017-01-11 | 共享装备有限公司 | Liquid material control system of sand mixer |
| CN106270376A (en) * | 2016-09-27 | 2017-01-04 | 苏州欣苏诚铸造机械有限公司 | Liquid material intelligence control system for mulling moulding |
| CN107214295A (en) * | 2017-06-19 | 2017-09-29 | 宝得粉末注射成形（常熟）有限公司 | Self-hardening sand mixing device |
| CN108907068B (en) * | 2018-06-29 | 2021-07-06 | 宁夏共享化工有限公司 | High-temperature curing agent for phenolic resin in field of cast 3D inkjet printing |
| CN111069526A (en) * | 2019-12-05 | 2020-04-28 | 江苏吉鑫风能科技股份有限公司 | Energy-saving consumption-reducing automatic resin quantifying method and system |
| CN114812765B (en) * | 2022-04-13 | 2024-12-06 | 共享智能铸造产业创新中心有限公司 | Liquid material cumulative measurement and discharge judgment method and mobile sand mixing system |
-
2008
- 2008-07-28 CN CNU2008201273769U patent/CN201226108Y/en not_active Expired - Lifetime
- 2008-07-28 CN CNU2008201273788U patent/CN201226107Y/en not_active Expired - Lifetime
- 2008-07-28 CN CNU200820127374XU patent/CN201229502Y/en not_active Expired - Lifetime
- 2008-07-28 CN CNU2008201273754U patent/CN201223921Y/en not_active Expired - Lifetime
- 2008-08-13 CN CNU2008201324281U patent/CN201259637Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101722273B (en) * | 2009-11-12 | 2011-04-13 | 无锡锡南铸造机械有限公司 | Foundry sand charging device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN201223921Y (en) | 2009-04-22 |
| CN201259637Y (en) | 2009-06-17 |
| CN201226108Y (en) | 2009-04-22 |
| CN201226107Y (en) | 2009-04-22 |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090429 |