CN104368768A - Hydraulic system, vertical parting molding machine and control method - Google Patents
Hydraulic system, vertical parting molding machine and control method Download PDFInfo
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- CN104368768A CN104368768A CN201410608863.7A CN201410608863A CN104368768A CN 104368768 A CN104368768 A CN 104368768A CN 201410608863 A CN201410608863 A CN 201410608863A CN 104368768 A CN104368768 A CN 104368768A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
- B22C15/28—Compacting by different means acting simultaneously or successively, e.g. preliminary blowing and finally pressing
- B22C15/30—Compacting by different means acting simultaneously or successively, e.g. preliminary blowing and finally pressing by both pressing and jarring devices
- B22C15/34—Compacting by different means acting simultaneously or successively, e.g. preliminary blowing and finally pressing by both pressing and jarring devices involving pneumatic or hydraulic mechanisms only
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Abstract
The invention relates to a hydraulic system which comprises an oil tank, a first oil cylinder, a second oil cylinder, a one-way oil pump, a control valve group and a middle body, wherein the oil tank contains hydraulic oil; the one-way oil pump is communicated with the oil tank through an inlet, and communicated with the first oil cylinder and the second oil cylinder through an outlet; an inlet of the control valve group is communicated with an outlet of the one-way oil pump, an outlet of the control valve group is communicated with the first oil cylinder and the second oil cylinder; an inlet of the middle body is communicated with an outlet of the control valve group, and an outlet of the middle body is communicated with the first oil cylinder and the second oil cylinder; the one-way oil pump is used for transmitting the hydraulic oil to the first oil cylinder and/or the second oil cylinder through the control valve group and the middle body, so that the first oil cylinder and/or the second oil cylinder can relatively move. According to the hydraulic system, the structure is simple, focused control is realized, the installed power can be reduced, and the demand of energy conservation and cost reduction can be met.
Description
Technical field
The present invention relates to forming metal castings field, particularly a kind of hydraulic system, vertical parting molding machine and control method.
Background technology
Forming metal castings is after producing corresponding sand mo(u)ld by moulding machine, by gained after cast, cooling.Sand mo(u)ld is that the mould be contained in positive plate and counter plate is passed through extruding molding sand gained in airtight cavity.Market has the moulding machine of various structures form, wherein have one the earliest by Denmark DISA Developed, domestic machine-building manufacturer starts the vertical-parting box-less shoot squeeze automatic moulding machine of imitation subsequently.The moulding machine of this form include the base apparatus console mode casing support of this machine, airtight moulding chamber system, can the pressure plate system of parallel walking, reversible counter system, the Major Systems such as cylinder system, hydraulic system, electric system composition that structure equidirectional is contrary.
Moulding machine on present domestic market is substantially by two kinds of form low speed types and high-speed type.The appearance of two kinds of types all makes the production of sand mo(u)ld achieve mechanization and automation, but all there is shortcoming: low speed type: zero covering can not be accomplished by the restriction procedure connection place of hydraulic system and cylinder system, and production efficiency is restricted greatly.High-speed type: although solve the problem of procedure connection, must increase a set of hydraulic system, control to be increased to two pumps by single pump of low speed type and control, not only installed power increases, and hydraulic system complexity strengthens, and cost of manufacture also increases thereupon.
Summary of the invention
The object of the present invention is to provide a kind of hydraulic system, vertical parting molding machine and control method, to improve the efficiency of low speed type, the power reducing high-speed type and cost.
The invention provides a kind of hydraulic system, comprising:
Fuel tank, it holds hydraulic oil;
First oil cylinder and the second oil cylinder;
Unidirectional oil pump, it is communicated with described fuel tank by entrance, is communicated with described first oil cylinder by outlet with the second oil cylinder;
Control valve group, the outlet of its entrance and described unidirectional oil pump, its outlet is communicated with the second oil cylinder with described first oil cylinder;
Intermediate, the entrance of this intermediate and the outlet of described control valve group, the outlet of this intermediate is communicated with the second oil cylinder with described first oil cylinder;
Hydraulic oil is passed to the first oil cylinder and/or the second oil cylinder from described fuel tank through described control valve group and described intermediate by described unidirectional oil pump, to make described first oil cylinder and/or the second oil cylinder can relative movement.
Further, described intermediate comprises main body, is formed with first passage, second channel and third channel in this main body; The entrance of described first passage, second channel and third channel respectively with the outlet of described control valve group; The outlet of described first passage is communicated with the first oil pocket A of described first oil cylinder and the first oil pocket A ' of described second oil cylinder respectively; The outlet of described second channel is communicated with the second oil pocket B of described first oil cylinder; The outlet of described third channel is communicated with the second oil pocket B ' of the second oil cylinder;
When described unidirectional oil pump is to described first oil pocket A fuel feeding, described first oil cylinder moves to first direction, and when to described second oil pocket B fuel feeding, described first oil cylinder moves to the second direction contrary with this first direction;
When described unidirectional oil pump is to when to described first oil pocket A ' fuel feeding, described second oil cylinder moves to first direction, and when to described second oil pocket B ' fuel feeding, described second oil cylinder moves to the second direction contrary with this first direction;
And the first direction of described first oil cylinder is contrary with the first direction of the second oil cylinder.
Further, described control valve group comprises the first control valve, the second control valve;
First entrance of described first control valve and the second control valve is all communicated to described unidirectional oily delivery side of pump; Second entrance of described first control valve and the second control valve is all communicated to described fuel tank;
First outlet of described first control valve is communicated with the entrance of described second channel, and described second control valve first outlet is communicated with the entrance of described third channel; Second outlet of described first control valve and the second control valve is all communicated to the entrance of described first passage.
Further, described control valve group also comprises the 3rd control valve, and the second outlet of described first control valve and the second control valve is all communicated to the entrance of described first passage through described 3rd control valve.
Further, described first oil cylinder also comprises the 3rd oil pocket C; Described intermediate also comprises the four-way be formed in described main body, the outlet of described four-way is communicated with described 3rd oil pocket C, the entrance of described four-way and the second outlet of described first control valve, the first entrance of described 3rd control valve is communicated on the oil circuit of the entrance of described four-way and the second outlet of described first control valve;
Described second oil cylinder also comprises the 3rd oil pocket C '; Described intermediate also comprises the Five-channel be formed in described main body, the outlet of described Five-channel is communicated with described 3rd oil pocket C ', the entrance of described Five-channel and the second outlet of described second control valve, the second entrance of described 3rd control valve is communicated on the oil circuit of the entrance of described Five-channel and the second outlet of described first control valve;
When described unidirectional oil pump is to described first oil pocket A and the 3rd oil pocket C fuel feeding, described first oil cylinder moves to first direction, and when to described second oil pocket B fuel feeding, described first oil cylinder moves to the second direction contrary with this first direction;
When described unidirectional oil pump is to when supplying fuel feeding to described first oil pocket A ' and the 3rd oil pocket C ', described second oil cylinder moves to first direction, and when to described second oil pocket B ' fuel feeding, described second oil cylinder moves to the second direction contrary with this first direction.
Further, also comprise the 4th control valve, the entrance of described 4th control valve is communicated with described first oil pocket A ' with described first oil pocket A respectively; The outlet of described 4th control valve is communicated with described fuel tank.
Further, also comprise controller, this controller is all connected with described first to fourth control valve, unidirectional oil pump; Also comprise the first sensor for detecting the pressure in the first oil pocket A and the second pressure sensor for detecting the pressure in the first oil pocket A ', described controller is also connected with described first pressure sensor and the second pressure sensor.
The present invention also proposes a kind of vertical parting molding machine, it is characterized in that, comprise pressure plate assembly, counter assembly, moulding room, penetrate sand system and above-mentioned hydraulic system, wherein, described pressure plate assembly comprises the pressure plate be fixedly connected with described first cylinder body; Described counter assembly comprises the counter be fixedly connected with described second cylinder body.
The present invention also proposes a kind of control method of above-mentioned vertical parting molding machine simultaneously, it is characterized in that, comprising:
1) penetrate sand step: when accent after pressure plate assembly is by moulding room close, counter assembly by moulding room before after accent enclosed shape forming cavity, loose molding sand is injected moulding indoor by penetrating sand system by compressed air;
2) pressing steps: first described unidirectional oil pump is in fuel feeding pressure release state, by described pressure sensor release signal to controller, controller controls the first control valve, the second control valve and the 3rd control valve, to make described unidirectional oil pump oil-filled to described oil pocket A, C, A1, C1, described fuel tank is returned by the first control valve, the second control valve and the 3rd control valve in oil pocket B and B1, now described positive and negative pressing plate move toward one another, becomes sand mo(u)ld by described molding sand Bidirectional-squeezing; After described pressure sensor pressure reaches preset pressure, the first control valve, the second control valve and the 3rd control valve quit work, and extruding terminates;
3) counter molding step: described unidirectional oil pump is in fuel feeding for pressure condition, and controller controls the second control valve makes unidirectional oil pump oil-filled to oil pocket B1, and the oil of C1 is got back in fuel tank through the second control valve simultaneously; Control the 4th control valve and make oil pocket A1 draining, the first control valve and the 3rd control valve quit work simultaneously; Therefore, counter part departs to left movement and sand mo(u)ld;
4) sand mold goes out chamber, mould assembly: unidirectional oil pump is in fuel feeding for pressure condition, controller controls the first control valve makes unidirectional oil pump oil-filled to oil pocket C, make the oil of B get back in fuel tank through the first control valve simultaneously, now drive oil pocket A by the 4th control valve from fuel tank repairing;
When rear sand mold is close to front sand mold, controller makes the first control valve transposition, and reduces the opening degree of this first control valve, and make the steady mould assembly of front and back sand mold, after mould assembly, after terminal delivered to by sand mold, the first control valve quits work;
5) pressure plate return: unidirectional oil pump is in fuel feeding for pressure condition, by controller, the second control valve and the 3rd control valve is quit work; Make that unidirectional oil pump is oil-filled to oil pocket B by the first control valve, oil pocket A by the 4th control valve oil return, oil pocket C by the first control valve to described fuel tank draining, therefore straight panel retreats; After straight panel is return and put in place, the first control valve and the 4th control valve quit work;
6) also return is turned under counter: unidirectional oil pump is in fuel feeding for pressure condition, by controller, the first control valve and the 3rd control valve is quit work; Make that unidirectional oil pump is oil-filled to oil pocket C1 by the second control valve, A1 supplements fluid by the 4th control valve from fuel tank, B1 by the second control valve to fuel tank draining; Turn under counter and return after, all control valves are all closed, counter stop motion.
Intermediate connector is upgraded by the present invention, and control valve group is directly installed on intermediate connector, makes that control valve is less, structure is more simple, controls more concentrated; In addition, achieve the positive and negative presser motion that could be realized by the two-way discharge capacity governor impeller that two costs are very high all not limit by the other side's run duration section, change a cheap one direction pump into control to realize, reduce installed power, meet demand that is energy-conservation and that reduce costs.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of a specific embodiment of hydraulic system of the present invention.
Fig. 2 is the schematic diagram of a specific embodiment of vertical parting molding machine of the present invention.
Detailed description of the invention
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Fig. 1 shows the schematic diagram of a specific embodiment of hydraulic system of the present invention.
The hydraulic system of the present embodiment, comprising:
Fuel tank 1, it holds hydraulic oil;
First oil cylinder 2 and the second oil cylinder 3;
Unidirectional oil pump 4, it is communicated with described fuel tank 1 by entrance, is communicated with described first oil cylinder 2 by outlet with the second oil cylinder 3;
Control valve group, the outlet of its entrance and described unidirectional oil pump 4, its outlet is communicated with the second oil cylinder 3 with described first oil cylinder 2;
Intermediate 5, the entrance of this intermediate 5 and the outlet of described control valve group, the outlet of this intermediate 5 is communicated with the second oil cylinder 3 with described first oil cylinder 2;
Hydraulic oil is passed to the first oil cylinder 2 and/or the second oil cylinder 3 from described fuel tank 1 through described control valve group and described intermediate 5 by described unidirectional oil pump 4, to make described first oil cylinder 2 and/or the second oil cylinder 3 can relative movement.
Described intermediate 5 comprises main body, is formed with first passage 5-1, second channel 5-2 and third channel 5-3 in this main body; The entrance of described first passage 5-1, second channel 5-2 and third channel 5-3 respectively with the outlet of described control valve group; The outlet of described first passage 5-1 is communicated with the first oil pocket A of described first oil cylinder 2 and the first oil pocket A ' of described second oil cylinder 3 respectively; The outlet of described second channel 5-2 is communicated with the second oil pocket B of described first oil cylinder 2; The outlet of described third channel 5-3 is communicated with the second oil pocket B ' of the second oil cylinder 3;
When described unidirectional oil pump 4 is to described first oil pocket A fuel feeding, described first oil cylinder 2 moves to first direction, and when to described second oil pocket B fuel feeding, described first oil cylinder 2 moves to the second direction contrary with this first direction;
When described unidirectional oil pump 4 is to when to described first oil pocket A ' fuel feeding, described second oil cylinder 3 moves to first direction, and when to described second oil pocket B ' fuel feeding, described second oil cylinder 3 moves to the second direction contrary with this first direction;
And the first direction of described first oil cylinder 2 is contrary with the first direction of the second oil cylinder 3.
Specifically, described control valve group comprises the first control valve E, the second control valve F;
First entrance of described first control valve E and the second control valve F is all communicated to the outlet of described unidirectional oil pump 4; Second entrance of described first control valve E and the second control valve F is all communicated to described fuel tank 1;
First outlet of described first control valve E is communicated with the entrance of described second channel 5-2, and described second control valve F first outlet is communicated with the entrance of described third channel 5-3; Second outlet of described first control valve E and the second control valve F is all communicated to the entrance of described first passage 5-1.In the present embodiment, for the ease of operation, the first control valve E and the second control valve F is three-dimensional cross valve.
In addition, described control valve group also comprises the 3rd control valve J, and second outlet of described first control valve E and the second control valve F is all communicated to the entrance of described first passage 5-1 through described 3rd control valve J.
Described first oil cylinder 2 also comprises the 3rd oil pocket C; Described intermediate 5 also comprises the four-way 5-4 be formed in described main body, the outlet of described four-way 5-4 is communicated with described 3rd oil pocket C, the entrance of described four-way 5-4 and second outlet of described first control valve E, first entrance of described 3rd control valve J is communicated on the oil circuit of the entrance of described four-way 5-4 and second outlet of described first control valve E;
Described second oil cylinder 3 also comprises the 3rd oil pocket C '; Described intermediate 5 also comprises the Five-channel 5-5 be formed in described main body, the outlet of described Five-channel 5-5 is communicated with described 3rd oil pocket C ', the entrance of described Five-channel 5-5 and second outlet of described second control valve F, second entrance of described 3rd control valve J is communicated on the oil circuit of the entrance of described Five-channel 5-5 and second outlet of described first control valve E;
When described unidirectional oil pump 4 is to described first oil pocket A and the 3rd oil pocket C fuel feeding, described first oil cylinder 2 moves to first direction, and when to described second oil pocket B fuel feeding, described first oil cylinder 2 moves to the second direction contrary with this first direction;
When described unidirectional oil pump 4 is to when supplying fuel feeding to described first oil pocket A ' and the 3rd oil pocket C ', described second oil cylinder 3 moves to first direction, and when to described second oil pocket B ' fuel feeding, described second oil cylinder 3 moves to the second direction contrary with this first direction.
Also comprise the 4th control valve H, the entrance of described 4th control valve H is communicated with described first oil pocket A ' with described first oil pocket A respectively; The outlet of described 4th control valve H is communicated with described fuel tank 1.
Also comprise controller P, this controller P is all connected with described first to fourth control valve H, unidirectional oil pump 4; Also comprise the first sensor O1 for detecting the pressure in the first oil pocket A and the second pressure sensor O2 for detecting the pressure in the first oil pocket A ', described controller P is also connected with described first pressure sensor O1 and the second pressure sensor O2.
Figure 2 shows that the specific embodiment of a kind of vertical parting molding machine of the present invention, it comprises pressure plate assembly, counter assembly, moulding room 3 ', penetrates sand system 4 ' and above-mentioned hydraulic system, wherein, described pressure plate assembly comprises the pressure plate 1 ' be fixedly connected with described first cylinder body; Described counter assembly comprises the counter 2 ' be fixedly connected with described second cylinder body.
Below in conjunction with the structure of the present embodiment, the control method of the vertical parting molding machine of the present embodiment is simply described, comprising:
1) penetrate sand step: when accent after pressure plate assembly is by moulding room 3 ' close, counter assembly by front for moulding room 3 ' accent enclosed shape forming cavity after, loose molding sand is injected in moulding room 3 ' by penetrating sand system 4 ' by compressed air;
2) pressing steps: first described unidirectional oil pump 4 is in fuel feeding pressure release state, by described pressure sensor release signal to controller P, controller P controls the first control valve E, the second control valve F and the 3rd control valve J, to make described unidirectional oil pump 4 oil-filled to described oil pocket A, C, A1, C1, described fuel tank 1 is returned by the first control valve E, the second control valve F and the 3rd control valve J in oil pocket B and B1, now described positive and negative pressing plate 2 ' move toward one another, becomes sand mo(u)ld by described molding sand Bidirectional-squeezing; After described pressure sensor pressure reaches preset pressure, the first control valve E, the second control valve F and the 3rd control valve J quit work, and extruding terminates;
3) counter molding step: described unidirectional oil pump 4 is in fuel feeding for pressure condition, and controller P controls the second control valve F makes unidirectional oil pump 4 oil-filled to oil pocket B1, and the oil of C1 is got back in fuel tank 1 through the second control valve F simultaneously; Control the 4th control valve H and make oil pocket A1 draining, the first control valve E and the 3rd control valve J quits work simultaneously; Therefore, counter 2 ' part departs to left movement and sand mo(u)ld;
4) sand mold goes out chamber, mould assembly: unidirectional oil pump 4 is in fuel feeding for pressure condition, controller P controls the first control valve E makes unidirectional oil pump 4 oil-filled to oil pocket C, make the oil of B get back in fuel tank 1 through the first control valve E simultaneously, now drive oil pocket A by the 4th control valve H from fuel tank 1 repairing;
When rear sand mold is close to front sand mold, controller P makes the first control valve E replace, and reduces the opening degree of this first control valve E, makes the steady mould assembly of front and back sand mold, and after mould assembly, after terminal delivered to by sand mold, the first control valve E quits work;
5) pressure plate return: unidirectional oil pump 4 is in fuel feeding for pressure condition, by controller P, the second control valve F and the 3rd control valve J is quit work; Make that unidirectional oil pump 4 is oil-filled to oil pocket B by the first control valve E, oil pocket A by the 4th control valve H oil return, oil pocket C by the first control valve E to described fuel tank 1 draining, therefore straight panel retreats; After straight panel is return and put in place, the first control valve E and the 4th control valve H quits work;
6) also return is turned under counter: unidirectional oil pump 4 is in fuel feeding for pressure condition, by controller P, the first control valve E and the 3rd control valve J is quit work; Make that unidirectional oil pump 4 is oil-filled to oil pocket C1 by the second control valve F, A1 supplements fluid by the 4th control valve H from fuel tank 1, B1 by the second control valve F to fuel tank 1 draining; Turn under counter 2 ' and return after, all control valves are all closed, counter 2 ' stop motion.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; Although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or carry out equivalent replacement to portion of techniques feature; And not departing from the spirit of technical solution of the present invention, it all should be encompassed in the middle of the technical scheme scope of request of the present invention protection.
Claims (9)
1. a hydraulic system, is characterized in that, comprising:
Fuel tank, it holds hydraulic oil;
First oil cylinder and the second oil cylinder;
Unidirectional oil pump, it is communicated with described fuel tank by entrance, is communicated with described first oil cylinder by outlet with the second oil cylinder;
Control valve group, the outlet of its entrance and described unidirectional oil pump, its outlet is communicated with the second oil cylinder with described first oil cylinder;
Intermediate, the entrance of this intermediate and the outlet of described control valve group, the outlet of this intermediate is communicated with the second oil cylinder with described first oil cylinder;
Hydraulic oil is passed to the first oil cylinder and/or the second oil cylinder from described fuel tank through described control valve group and described intermediate by described unidirectional oil pump, to make described first oil cylinder and/or the second oil cylinder can relative movement.
2. hydraulic system as claimed in claim 1, it is characterized in that, described intermediate comprises main body, is formed with first passage, second channel and third channel in this main body; The entrance of described first passage, second channel and third channel respectively with the outlet of described control valve group; The outlet of described first passage is communicated with the first oil pocket A of described first oil cylinder and the first oil pocket A ' of described second oil cylinder respectively; The outlet of described second channel is communicated with the second oil pocket B of described first oil cylinder; The outlet of described third channel is communicated with the second oil pocket B ' of the second oil cylinder;
When described unidirectional oil pump is to described first oil pocket A fuel feeding, described first oil cylinder moves to first direction, and when to described second oil pocket B fuel feeding, described first oil cylinder moves to the second direction contrary with this first direction;
When described unidirectional oil pump is to when to described first oil pocket A ' fuel feeding, described second oil cylinder moves to first direction, and when to described second oil pocket B ' fuel feeding, described second oil cylinder moves to the second direction contrary with this first direction;
And the first direction of described first oil cylinder is contrary with the first direction of the second oil cylinder.
3. hydraulic system as claimed in claim 2, it is characterized in that, described control valve group comprises the first control valve, the second control valve;
First entrance of described first control valve and the second control valve is all communicated to described unidirectional oily delivery side of pump; Second entrance of described first control valve and the second control valve is all communicated to described fuel tank;
First outlet of described first control valve is communicated with the entrance of described second channel, and described second control valve first outlet is communicated with the entrance of described third channel; Second outlet of described first control valve and the second control valve is all communicated to the entrance of described first passage.
4. hydraulic system as claimed in claim 3, it is characterized in that, described control valve group also comprises the 3rd control valve, and the second outlet of described first control valve and the second control valve is all communicated to the entrance of described first passage through described 3rd control valve.
5. hydraulic system as claimed in claim 4, it is characterized in that, described first oil cylinder also comprises the 3rd oil pocket C; Described intermediate also comprises the four-way be formed in described main body, the outlet of described four-way is communicated with described 3rd oil pocket C, the entrance of described four-way and the second outlet of described first control valve, the first entrance of described 3rd control valve is communicated on the oil circuit of the entrance of described four-way and the second outlet of described first control valve;
Described second oil cylinder also comprises the 3rd oil pocket C '; Described intermediate also comprises the Five-channel be formed in described main body, the outlet of described Five-channel is communicated with described 3rd oil pocket C ', the entrance of described Five-channel and the second outlet of described second control valve, the second entrance of described 3rd control valve is communicated on the oil circuit of the entrance of described Five-channel and the second outlet of described first control valve;
When described unidirectional oil pump is to described first oil pocket A and the 3rd oil pocket C fuel feeding, described first oil cylinder moves to first direction, and when to described second oil pocket B fuel feeding, described first oil cylinder moves to the second direction contrary with this first direction;
When described unidirectional oil pump is to when supplying fuel feeding to described first oil pocket A ' and the 3rd oil pocket C ', described second oil cylinder moves to first direction, and when to described second oil pocket B ' fuel feeding, described second oil cylinder moves to the second direction contrary with this first direction.
6. hydraulic system as claimed in claim 5, it is characterized in that: also comprise the 4th control valve, the entrance of described 4th control valve is communicated with described first oil pocket A ' with described first oil pocket A respectively; The outlet of described 4th control valve is communicated with described fuel tank.
7. hydraulic system as claimed in claim 6, it is characterized in that: also comprise controller, this controller is all connected with described first to fourth control valve, unidirectional oil pump; Also comprise the first sensor for detecting the pressure in the first oil pocket A and the second pressure sensor for detecting the pressure in the first oil pocket A ', described controller is also connected with described first pressure sensor and the second pressure sensor.
8. a vertical parting molding machine, it is characterized in that, comprise pressure plate assembly, counter assembly, moulding room, penetrate sand system and the hydraulic system as described in claim 1 ~ 7, wherein, described pressure plate assembly comprises the pressure plate be fixedly connected with described first cylinder body; Described counter assembly comprises the counter be fixedly connected with described second cylinder body.
9. a control method for vertical parting molding machine as claimed in claim 8, is characterized in that, comprising:
1) penetrate sand step: when accent after pressure plate assembly is by moulding room close, counter assembly by moulding room before after accent enclosed shape forming cavity, loose molding sand is injected moulding indoor by penetrating sand system by compressed air;
2) pressing steps: first described unidirectional oil pump is in fuel feeding pressure release state, by described pressure sensor release signal to controller, controller controls the first control valve, the second control valve and the 3rd control valve, to make described unidirectional oil pump oil-filled to described oil pocket A, C, A1, C1, described fuel tank is returned by the first control valve, the second control valve and the 3rd control valve in oil pocket B and B1, now described positive and negative pressing plate move toward one another, becomes sand mo(u)ld by described molding sand Bidirectional-squeezing; After described pressure sensor pressure reaches preset pressure, the first control valve, the second control valve and the 3rd control valve quit work, and extruding terminates;
3) counter molding step: described unidirectional oil pump is in fuel feeding for pressure condition, and controller controls the second control valve makes unidirectional oil pump oil-filled to oil pocket B1, and the oil of C1 is got back in fuel tank through the second control valve simultaneously; Control the 4th control valve and make oil pocket A1 draining, the first control valve and the 3rd control valve quit work simultaneously; Therefore, counter part departs to left movement and sand mo(u)ld;
4) sand mold goes out chamber, mould assembly: unidirectional oil pump is in fuel feeding for pressure condition, controller controls the first control valve makes unidirectional oil pump oil-filled to oil pocket C, make the oil of B get back in fuel tank through the first control valve simultaneously, now drive oil pocket A by the 4th control valve from fuel tank repairing;
When rear sand mold is close to front sand mold, controller makes the first control valve transposition, and reduces the opening degree of this first control valve, and make the steady mould assembly of front and back sand mold, after mould assembly, after terminal delivered to by sand mold, the first control valve quits work;
5) pressure plate return: unidirectional oil pump is in fuel feeding for pressure condition, by controller, the second control valve and the 3rd control valve is quit work; Make that unidirectional oil pump is oil-filled to oil pocket B by the first control valve, oil pocket A by the 4th control valve oil return, oil pocket C by the first control valve to described fuel tank draining, therefore straight panel retreats; After straight panel is return and put in place, the first control valve and the 4th control valve quit work;
6) also return is turned under counter: unidirectional oil pump is in fuel feeding for pressure condition, by controller, the first control valve and the 3rd control valve is quit work; Make that unidirectional oil pump is oil-filled to oil pocket C1 by the second control valve, A1 supplements fluid by the 4th control valve from fuel tank, B1 by the second control valve to fuel tank draining; Turn under counter and return after, all control valves are all closed, counter stop motion.
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| CN201410608863.7A CN104368768B (en) | 2014-11-04 | 2014-11-04 | A kind of hydraulic system, vertical parting molding machine and control method |
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| CN201410608863.7A CN104368768B (en) | 2014-11-04 | 2014-11-04 | A kind of hydraulic system, vertical parting molding machine and control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112088056A (en) * | 2018-05-07 | 2020-12-15 | 新东工业株式会社 | Wet sand mold modeling sensor and method for evaluating wet sand mold modeling performance |
| CN112720947A (en) * | 2021-01-16 | 2021-04-30 | 东莞市智动科技有限公司 | Oil cylinder mold splitting device system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112088056A (en) * | 2018-05-07 | 2020-12-15 | 新东工业株式会社 | Wet sand mold modeling sensor and method for evaluating wet sand mold modeling performance |
| CN112720947A (en) * | 2021-01-16 | 2021-04-30 | 东莞市智动科技有限公司 | Oil cylinder mold splitting device system |
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| CN104368768B (en) | 2018-07-13 |
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