CN103496126A - Secondary mold locking device of plastic injection molding machine - Google Patents
Secondary mold locking device of plastic injection molding machine Download PDFInfo
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- CN103496126A CN103496126A CN201310458782.9A CN201310458782A CN103496126A CN 103496126 A CN103496126 A CN 103496126A CN 201310458782 A CN201310458782 A CN 201310458782A CN 103496126 A CN103496126 A CN 103496126A
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- Prior art keywords
- locking
- mold locking
- piston
- locked mode
- rotor housing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/64—Mould opening, closing or clamping devices
- B29C45/68—Mould opening, closing or clamping devices hydro-mechanical
- B29C45/681—Mould opening, closing or clamping devices hydro-mechanical using a toggle mechanism as mould clamping device
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a secondary mold locking device of a plastic injection molding machine. The secondary mold locking device of the plastic injection molding machine comprises a rear mold plate arranged on a rear mold. The secondary mold locking device of the plastic injection molding machine is characterized in that the rear part of the rear mold plate is provided with a toggle rod linkage device; the toggle rod linkage device is provided with a secondary mold locking oil cylinder; the secondary mold locking oil cylinder comprises a mold locking oil cylinder rear cover, a mold locking rear cylinder body, a mold locking cylinder body seat, a mold locking front cylinder body and a mold locking oil cylinder front cover which are connected sequentially; the mold locking rear cylinder body is internally provided with a mold locking piston; the mold locking piston is provided with a piston rod for penetrating through the mold locking cylinder body seat, the mold locking front cylinder body and the mold locking oil cylinder front cover; the mold locking oil cylinder front cover and the piston rod are respectively connected with the toggle rod linkage device. The secondary mold locking device of the plastic injection molding machine, which is provided by the invention, not only can achieve secondary mold locking, but also can reduce the burden of a proportion regulating valve and an oil pump, is low in energy consumption, and meanwhile has the advantages of being beneficial to air exhaust of mold, capable of regulating the mold locking force flexibly, and accelerating the injection and mold filling.
Description
Technical field
The present invention relates to the manufacture field of injection-moulding plastic equipment, is a kind ofly to realize that the clamping mechanism of plastic-injection moulding machine carries out the secondary clamping apparatus of the plastic-injection moulding machine of secondary locked mode specifically.
Background technology
The clamping mechanism of current plastic-injection moulding machine mainly divides two kinds of mechanical type and fluid pressure types; wherein the mechanical lock mold mechanism adopts the hinge connecting rod to push up the matched moulds that the mode of pressing rear mold realizes the front and back mould, and hydraulic mold locking mechanism adopts the hydraulic jack top to press the mode of rear mold to realize the matched moulds of front and back mould.Yet above-mentioned two kinds of clamping mechanisms all have significant deficiency.The mechanical lock mold mechanism is the cooperation transmission that utilizes hinge and connecting rod, and rear pattern plate is pressed on the matched moulds position by top.Front and back, the flex point place mould that drives hinge arrival connecting rod when rear mold could be locked.Although ensured the clamp force of front and back moulds by the high degree of rigidity of frame for movement; but the size of its clamp force has extremely strong mutability; can not realize the secondary locked mode in whole matched moulds process; can not regulate at any time clamp force; exhaust when so the mechanical lock mold mechanism both had been unfavorable for product molding, the goods that can not become moldeed depth chamber goods, thin-gage goods and packing to have relatively high expectations.And hydraulic mold locking mechanism utilizes hydraulic jack to promote rear pattern plate, mould matched moulds before and after making, and ensure fitting tightly of in injection and feed supplement process front and back mould under the persistent pressure of hydraulic jack.By the control of oil pressure in hydraulic jack, the secondary mould closing of mould before and after can realizing, and can in the matched moulds process, regulate at any time clamp force.So hydraulic mold locking mechanism both had been beneficial to the exhaust of product molding, the goods that also can become moldeed depth chamber goods, thin-gage goods and packing to have relatively high expectations.Yet hydraulic mold locking mechanism is in whole matched moulds and locked mode process, the oil pressure in hydraulic jack constantly changes, and except the work load of the ratio adjusting valve that has strengthened injection (mo(u)lding) machine and oil pump, also can waste a large amount of hydraulic energies.Therefore, the clamping mechanism of existing plastic-injection moulding machine still awaits further improvement.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of and not only can realize the secondary locked mode, but also can reduce the secondary clamping apparatus of the burden of ratio adjusting valve and oil pump and the little plastic-injection moulding machine of energy consumption.
Another object of the present invention is to overcome the deficiencies in the prior art, but a kind of secondary clamping apparatus that is beneficial to die venting flexible modulation clamp force and accelerates the plastic-injection moulding machine of injection filling mould speed is provided.
Goal of the invention of the present invention is achieved in that a kind of secondary clamping apparatus of plastic-injection moulding machine, comprise the rear pattern plate be arranged on rear mold, it is characterized in that: the rear portion of described rear pattern plate is provided with the toggle link linkage, the toggle link linkage is provided with the secondary Mode-locking oil cylinder, the secondary Mode-locking oil cylinder comprises the Mode-locking oil cylinder bonnet connected successively, the locked mode rear-bank rotor housing, the locked mode cylinder block, locked mode front-bank rotor housing and Mode-locking oil cylinder protecgulum, be provided with locking piston in the locked mode rear-bank rotor housing, locking piston is provided with and runs through the locked mode cylinder block, the piston rod of locked mode front-bank rotor housing and Mode-locking oil cylinder protecgulum, the Mode-locking oil cylinder protecgulum is connected with the toggle link linkage respectively with piston rod.
Described toggle link linkage comprises that end is movably articulated in the connecting rod on rear pattern plate, drive link and the drive rod be movably hinged with the other end of the relative rear pattern plate of connecting rod respectively, the end of drive link is movably articulated in a fixed head be fixed on the Mode-locking oil cylinder protecgulum, and drive rod is fixedly connected with piston rod.
Described piston rod is socketed with limiting piston near on an end of locking piston, and limiting piston runs through the locked mode cylinder block and puts in the locked mode front-bank rotor housing, and is matchedly connected with the sidewall of locked mode front-bank rotor housing, and can come and go along sidewall mobile.
Be provided with the stroke adjustment cover be socketed on the limiting piston lateral surface in described locked mode front-bank rotor housing.
In described locked mode rear-bank rotor housing, the rear end of locking piston is communicated with oil pump and fuel tank respectively through direction valve D, throttle valve A and direction valve C.
In described locked mode rear-bank rotor housing, the front end of locking piston is communicated with oil pump and fuel tank respectively through direction valve C.
In described locked mode front-bank rotor housing, the front end of limiting piston is communicated with oil pump and fuel tank respectively through direction valve B.
Described direction valve D is communicated with throttle valve A, injection oil circuit device and the energy storage equipment that is arranged on oil pump respectively.
Described injection oil circuit device comprises direction valve A and the choke valve connected successively, and direction valve A and direction valve D are communicated with.
Described energy storage equipment comprises check valve, pressure-reducing valve and the accumulator connected successively, and check valve is connected on oil pump, and accumulator is communicated with direction valve D.
Compared with prior art, its advantage is in the present invention:
1, in the secondary clamping apparatus of plastic-injection moulding machine of the present invention; the at first oil-feed of limiting piston front end, make limiting piston move toward the locking piston direction, and drive stroke adjustment cover together moves; stop when the stroke adjustment cover touches with locked mode cylinder body seated connection, and keep the state of sealing pocketed oil.By in the oiling supercharging of locked mode rear-bank rotor housing inner carrier rear end, make rear pattern plate and front template produce mould assembling action, when arriving the setting gap stayed between the template of front and back, stop, injection device moves simultaneously and carries out injection.Due between the template of front and back still in open mode, die cavity is cavity, melt flow resistance in die cavity is less, and the gas in die cavity can be discharged in time by gap, so this structure can effectively reduce the injection resistance and reduce the power demand of injection.And in the time need to realizing the complete closure of mould, the front end release of limiting piston, oil pressure in the locked mode rear-bank rotor housing is provided by accumulator, continue to promote piston-advance, the drive rod that piston rod drives the toggle link linkage outwards ejects, make connecting rod and drive link in line, realize the locking of toggle link linkage.The toggle link linkage can provide larger locked mode rigidity, makes clamp force in stable state, ensures that two sections injections of injection device, three sections injections and pressurize action can carry out smoothly.
2, in the secondary clamping apparatus of plastic-injection moulding machine of the present invention, the unnecessary hydraulic energy that utilizes accumulator to produce in goods cooling and shaping process is stored, and accumulator can be the hydraulic energy that provides a large amount of when secondary locked mode process and injection mechanism carry out biphasic injection, three injections and pressurize, significantly accelerate injection speed, reduced the oil pump energy consumption.In addition, the hydraulic energy that can add accumulator during due to the injection mechanism injection, in the injection occasion of the large flow of needs, large pressure, the above-mentioned hydraulic energy added can improve surface quality and the packing of goods, is beneficial to the moulding of massive article, dark chamber goods and thin-gage goods.
3, in the secondary clamping apparatus of plastic-injection moulding machine of the present invention; fluid pressure type and mechanical secondary clamping mechanism have been adopted; the die cavity internal gas pressure is reduced, and secondary clamp force participation injection, and the hydraulic energy in the accumulator after the secondary locked mode can improve original injection speed.Therefore the clamp force needed in actual production is less, the manufacturing cost of having saved clamping mechanism.In addition, the secondary clamping mechanism can effectively avoid needing the thin-walled of high speed injection or massive article to damage mold insert in die cavity to the impact stress of whole clamping apparatus, has extended machine service life.
4, in the secondary clamping apparatus of plastic-injection moulding machine of the present invention, because upper and lower mould not yet closes up, therefore melt belongs to low pressure molding in the process that is full of die cavity.And when pressurize and feed supplement by the accumulator fuel feeding, oil pump itself can not participate in pressurize and feed supplement process, therefore can save the hydraulic energy of bulk article moulding.
The accompanying drawing explanation
Accompanying drawing 1 is the structural representation of most preferred embodiment of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
Shown in 1, the secondary clamping apparatus of plastic-injection moulding machine of the present invention mainly comprises rear pattern plate 1, secondary Mode-locking oil cylinder 2 and the toggle link linkage 3 be arranged on rear mold with reference to the accompanying drawings.Wherein, toggle link linkage 3 is connected to rear pattern plate 1 rear portion, and secondary Mode-locking oil cylinder 2 is connected on toggle link linkage 3.In the present invention, secondary Mode-locking oil cylinder 2 comprises Mode-locking oil cylinder bonnet 21, locked mode rear-bank rotor housing 22, locked mode cylinder block 23, locked mode front-bank rotor housing 24 and the Mode-locking oil cylinder protecgulum 25 connected successively.Be provided with locking piston 26 in locked mode rear-bank rotor housing 22; locking piston 26 is provided with piston rod 27; piston rod 27 runs through locked mode cylinder block 23, locked mode front-bank rotor housing 24 and Mode-locking oil cylinder protecgulum 25 and extend out to outside secondary Mode-locking oil cylinder 2, and Mode-locking oil cylinder protecgulum 25 is connected with toggle link linkage 3 respectively with piston rod 27.3 of toggle link linkages mainly comprise connecting rod 31, drive link 32 and drive rod 33.Wherein the end of connecting rod 31 is movably articulated on rear pattern plate 1, and drive link 32 and drive rod 33 respectively the other end of rear pattern plate 1 relative to connecting rod 31 be movably hinged.The end of drive link 32 is provided with fixed head 34, and fixed head 34 is fixed together with Mode-locking oil cylinder protecgulum 25, and the end of drive link 32 is movably hinged with fixed head 34, and drive rod 33 is fixedly connected with piston rod 27.In said structure, piston rod 27 drives drive rod 33 and outwards presses on top under the driving of locking piston 26, and drive link 32 and connecting rod 31 are depressed in line outside, realizes the locking after the mould closure.Be socketed with limiting piston 28 on piston rod 27; limiting piston 28 is arranged at the end place near locking piston 26; and limiting piston 28 runs through locked mode cylinder block 23 and puts in locked mode front-bank rotor housing 24; and be matchedly connected with the sidewall of locked mode front-bank rotor housing 24, limiting piston 28 can come and go along the sidewall of locked mode front-bank rotor housing 24 mobile.Form another hydraulic system between limiting piston 28 and locked mode front-bank rotor housing 24, this hydraulic system can limit locking piston 26 at the stroke that matched moulds pushes for the first time forward, before and after making, between mould, stays fixing gap.And, in the die sinking process, this hydraulic system also can be added in mould opening force, make opening of mould more smooth and easy.In addition, be provided with one stroke regulating sleeve 29 in locked mode front-bank rotor housing 24, stroke adjustment cover 29 is socketed on limiting piston 28 lateral surfaces.The end face of the trip regulating sleeve 29 can be connected with the end face of locked mode cylinder block 23 and the back side of limiting piston 28 respectively, and its effect is by adjusting the position of stroke adjustment cover 29, realizes controlling the shift motion of limiting piston 28 in locked mode front-bank rotor housing 24.In locked mode rear-bank rotor housing 22, the rear end of locking piston 26 is communicated with oil pump 51 and fuel tank 52 respectively through direction valve D41, throttle valve A 45 and direction valve C42, and in locked mode rear-bank rotor housing 22, the front end of locking piston 26 is communicated with oil pump 51 and fuel tank 52 respectively through direction valve C42.The front and back end of locking piston 26 is communicated with oil pump 51 and fuel tank 52 respectively, makes to form and can promote the hydraulic system that locking piston 26 is made back and forth movement between locking piston 26 and locked mode rear-bank rotor housing 22, realizes the back and forth movement of locking piston 26 when die sinking or matched moulds.And in locked mode front-bank rotor housing 24, the front end of limiting piston 28 is communicated with oil pump 51 and fuel tank 52 respectively through direction valve B43; because limiting piston 28 rear portions can promote by locking piston 26; therefore only need to guarantee supercharging or the pressure release action of limiting piston 28 front ends, can realize limiting the movement travel of locking piston 26.In addition, direction valve D41 is communicated with throttle valve A 45, injection oil circuit device and the energy storage equipment that is arranged on oil pump 51 respectively, when the injection of the large flow of needs, large pressure, the hydraulic energy of energy storage equipment can add in the injection oil circuit through direction valve D41, increase the injection pressure of injection oil circuit, make injection speed faster.And injection oil circuit device of the present invention comprises direction valve A61 and the choke valve 62 connected successively, direction valve A61 and direction valve D41 are communicated with.Direction valve A61 can ensure that the hydraulic energy of energy storage equipment can not reflux, and choke valve 62 can be regulated the flow under injection pressure.In addition, energy storage equipment of the present invention comprises check valve 71, pressure-reducing valve 72 and the accumulator 73 connected successively, and check valve 71 is connected on oil pump 51, and accumulator 73 is communicated with direction valve D41.The unnecessary hydraulic energy that above-mentioned energy storage equipment can produce clamping apparatus when the matched moulds for the first time is stored up, and the locked mode rear-bank rotor housing 22 when this hydraulic energy is exported to matched moulds for the second time, accelerates the reaction speed of locked mode for the second time.Simultaneously, the hydraulic energy of storage can also export the injection oil circuit to by direction valve D41, increases the actual output pressure of injection oil circuit.
Above-mentioned specific embodiment is only the effect of the present invention specific embodiment preferably, and the identical or structure that is equal to of all secondary clamping apparatus with plastic-injection moulding machine of the present invention, all in protection scope of the present invention.
Claims (10)
1. the secondary clamping apparatus of a plastic-injection moulding machine, comprise the rear pattern plate (1) be arranged on rear mold, it is characterized in that: the rear portion of described rear pattern plate (1) is provided with toggle link linkage (3), toggle link linkage (3) is provided with secondary Mode-locking oil cylinder (2), secondary Mode-locking oil cylinder (2) comprises the Mode-locking oil cylinder bonnet (21) connected successively, locked mode rear-bank rotor housing (22), locked mode cylinder block (23), locked mode front-bank rotor housing (24) and Mode-locking oil cylinder protecgulum (25), be provided with locking piston (26) in locked mode rear-bank rotor housing (22), locking piston (26) is provided with and runs through locked mode cylinder block (23), the piston rod (27) of locked mode front-bank rotor housing (24) and Mode-locking oil cylinder protecgulum (25), Mode-locking oil cylinder protecgulum (25) is connected with toggle link linkage (3) respectively with piston rod (27).
2. the secondary clamping apparatus of plastic-injection moulding machine according to claim 1, it is characterized in that: described toggle link linkage (3) comprises that end is movably articulated in the connecting rod (31) on rear pattern plate (1), drive link (32) and the drive rod (33) be movably hinged with the other end of the relative rear pattern plate of connecting rod (31) (1) respectively, the end of drive link (32) is movably articulated in a fixed head (34) be fixed on Mode-locking oil cylinder protecgulum (25), and drive rod (33) is fixedly connected with piston rod (27).
3. the secondary clamping apparatus of plastic-injection moulding machine according to claim 1; it is characterized in that: described piston rod (27) is socketed with limiting piston (28) near on an end of locking piston (26); limiting piston (28) runs through locked mode cylinder block (23) and puts in locked mode front-bank rotor housing (24); be matchedly connected with the sidewall of locked mode front-bank rotor housing (24), and can come and go along sidewall mobile.
4. the secondary clamping apparatus of plastic-injection moulding machine according to claim 1, is characterized in that: be provided with the stroke adjustment cover (29) be socketed on limiting piston (28) lateral surface in described locked mode front-bank rotor housing (24).
5. the secondary clamping apparatus of plastic-injection moulding machine according to claim 1, it is characterized in that: in described locked mode rear-bank rotor housing (22), the rear end of locking piston (26) is through direction valve D(41), throttle valve A (45) and direction valve C(42) with oil pump (51) and fuel tank (52), be communicated with respectively.
6. the secondary clamping apparatus of plastic-injection moulding machine according to claim 1, it is characterized in that: in described locked mode rear-bank rotor housing (22), the front end of locking piston (26) is through direction valve C(42) with oil pump (51) and fuel tank (52), be communicated with respectively.
7. the secondary clamping apparatus of plastic-injection moulding machine according to claim 1, it is characterized in that: in described locked mode front-bank rotor housing (24), the front end of limiting piston (28) is through direction valve B(43) with oil pump (51) and fuel tank (52), be communicated with respectively.
8. according to the secondary clamping apparatus of claim 5 or the described plastic-injection moulding machine of claim 6, it is characterized in that: described direction valve D(41) with throttle valve A (45), injection oil circuit device and the energy storage equipment that is arranged on oil pump (51), be communicated with respectively.
9. the secondary clamping apparatus of plastic-injection moulding machine according to claim 8, it is characterized in that: described injection oil circuit device comprises the direction valve A(61 connected successively) and choke valve (62), direction valve A(61) and direction valve D(41) connection.
10. the secondary clamping apparatus of plastic-injection moulding machine according to claim 8, it is characterized in that: described energy storage equipment comprises check valve (71), pressure-reducing valve (72) and the accumulator (73) connected successively, it is upper that check valve (71) is connected to oil pump (51), accumulator (73) and direction valve D(41) be communicated with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310458782.9A CN103496126A (en) | 2013-10-06 | 2013-10-06 | Secondary mold locking device of plastic injection molding machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310458782.9A CN103496126A (en) | 2013-10-06 | 2013-10-06 | Secondary mold locking device of plastic injection molding machine |
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| CN103496126A true CN103496126A (en) | 2014-01-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310458782.9A Pending CN103496126A (en) | 2013-10-06 | 2013-10-06 | Secondary mold locking device of plastic injection molding machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106142483A (en) * | 2015-04-22 | 2016-11-23 | 江苏天源试验设备有限公司 | A kind of precise injection machine |
| CN111873337A (en) * | 2020-08-21 | 2020-11-03 | 广东威亚精密机械股份有限公司 | Injection system and full-hydraulic injection molding machine |
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| JPH05169503A (en) * | 1991-12-24 | 1993-07-09 | Sumitomo Jukikai Plast Mach Kk | Mold clamping device |
| CN2637154Y (en) * | 2002-12-23 | 2004-09-01 | 龚秉周 | Filling pressing two step shaping machine mould combining structure |
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| CN103128941A (en) * | 2013-03-05 | 2013-06-05 | 北京化工大学常州先进材料研究院 | Mechanical-hydraulic type double-movable-plate secondary mould closing structure of precise injection molding machine |
| CN203496245U (en) * | 2013-10-06 | 2014-03-26 | 黄时来 | Secondary mould locking device of plastic injection molding machine |
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2013
- 2013-10-06 CN CN201310458782.9A patent/CN103496126A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05169503A (en) * | 1991-12-24 | 1993-07-09 | Sumitomo Jukikai Plast Mach Kk | Mold clamping device |
| CN2637154Y (en) * | 2002-12-23 | 2004-09-01 | 龚秉周 | Filling pressing two step shaping machine mould combining structure |
| JP2007076142A (en) * | 2005-09-14 | 2007-03-29 | Toshiba Mach Co Ltd | Mold clamping device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106142483A (en) * | 2015-04-22 | 2016-11-23 | 江苏天源试验设备有限公司 | A kind of precise injection machine |
| CN106142483B (en) * | 2015-04-22 | 2024-02-23 | 江苏天源试验设备有限公司 | Precise injection molding machine |
| CN111873337A (en) * | 2020-08-21 | 2020-11-03 | 广东威亚精密机械股份有限公司 | Injection system and full-hydraulic injection molding machine |
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Application publication date: 20140108 |