CN104527002A - Mold opening and closing method for mold closing device of two-plate type injection molding machine - Google Patents
Mold opening and closing method for mold closing device of two-plate type injection molding machine Download PDFInfo
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- CN104527002A CN104527002A CN201410827703.1A CN201410827703A CN104527002A CN 104527002 A CN104527002 A CN 104527002A CN 201410827703 A CN201410827703 A CN 201410827703A CN 104527002 A CN104527002 A CN 104527002A
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- pull bar
- nut
- plate
- bull gear
- injection machine
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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
Abstract
The invention discloses a mold opening and closing method for a mold closing device of a two-plate type injection molding machine. The mold closing device comprises a fixed mold plate (1), a movable mold plate (2), pull rods (3) and a mold moving oil cylinder (4), wherein the fixed mold plate (1) is arranged at one ends of the pull rods (3), and the other ends of the pull rods (3) are sleeved by the movable mold plate (2); the mold closing device of the injection molding machine further comprises front screw nuts (5), rear screw nuts (6), a large gear ring (7) and a power mechanism for driving the large gear ring (7) to rotate, the front screw nuts (5) are in one-to-one correspondence with the pull rods (3), external threads matched with the rear screw nuts are arranged on the pull rods (3), the rear screw nuts (6) are also in one-to-one correspondence with the pull rods (3) and fixedly connected on the movable mold plate (2), the outer edges of the front screw nuts (5) are set to be like gears, the large gear ring (7) is meshed with each front screw nut (5), and the large gear ring drives the front screw nuts to rotate under the drive of the power mechanism. According to the mold opening and closing method disclosed by the invention, a mold locking oil cylinder is not required, and energy consumption in mold locking is reduced by self-locking of the mechanism.
Description
Technical field
The present invention relates to injection machine field, specifically a kind of folding modeling method of two-plate injection machine matched molds apparatus.
Background technology
The mould-matching structure of existing two-plate injection machine, mainly contains hydraulic direct locking-type and combined type two kinds.Wherein, hydraulic direct locking-type workflow is mainly: first moved by rapid mould-moving oil cylinder pushing moving platen, then by band-type brake structure, pull bar is locked, again by Mode-locking oil cylinder by mold-locked, this hydraulic direct locking-type has automatic mold-adjustment function, but the hydraulic system relative complex required for it, reliability is poor, the size that takes up room compares three-plate type injection machine also not obvious especially advantage, especially time larger for clamp force, need four very large oil cylinders, power is large, and during locked mode and pressurize be need to consume larger energy.Typical combined type, then mainly driving moving platen movement fast by being fixed on Quick cylinder in quiet template, mould being closed, particularly, be relative fixing by positioning and locking device between moving platen with pull bar, then pull pull bar by mold-locked by Mode-locking oil cylinder.In combined type, mode transfer structure is generally divided into following two kinds: one, in Mode-locking oil cylinder, pass through fine adjustment draw rod positions, makes pull bar tooth top agree with the tooth root position entering lock nut, locate and then lock pull bar; Two, regulate into lock nut location by actuating units such as motors, make pull bar agree with the position entering lock nut, locate and then lock pull bar.In these two kinds of mode transfer structures, four pull bars or enter lock nut and all need to increase independent power set, oil piping system complicates simultaneously, adds sizable cost, is not too applicable to middle-size and small-size two-plate injection machine.
Summary of the invention
In view of this, the invention provides a kind of folding modeling method of two-plate injection machine matched molds apparatus, to solve the technical problem that hydraulic system is complicated, energy consumption is high that prior art exists, propose the low mould-locking structure of energy consumption to solve the problems of the technologies described above.
Technical solution of the present invention is, a kind of folding modeling method of two-plate injection machine matched molds apparatus of following structure is provided, based on two-plate injection machine matched molds apparatus, described two-plate injection machine matched molds apparatus comprises solid plate, moving die plate, pull bar and mould shifting oil cylinder, described solid plate is arranged on one end of pull bar, described moving die plate is sheathed on the other end of pull bar, and the piston end of described mould shifting oil cylinder is connected with moving die plate to drive it to move;
The actuating unit that described injection machine matched molds apparatus also comprises front nut, back nut, bull gear and drives bull gear to rotate, described front nut and pull bar one_to_one corresponding are also fixed on the solid plate side of pull bar, described pull bar is provided with the external screw thread coordinated with back nut, described back nut is also fixedly connected on moving die plate with pull bar one_to_one corresponding, be combined on pull bar, the outer rim of front nut is arranged to gear-like, described bull gear engages with each front nut respectively, nut rotation before bull gear drives under the driving of actuating unit;
Described folding modeling method comprises the following steps:
Matched moulds process: mould shifting oil cylinder pulls moving die plate to move to oil cylinder stroke to solid plate direction to complete only, actuating unit is started working, drive bull gear rotates, nut rotation before bull gear rotates and drives, front nut drives pull bar to rotate, and pull bar rotates and makes pull rod screw and back nut screw-threaded engagement, and back nut is moved axially at pull bar, until complete matched moulds, pull bar deformation is to clamp force required value;
Die sinking process: after part cooling, actuating unit drives bull gear reversion, nut rotation before bull gear drives, front nut drives pull bar to rotate, pull bar rotates and pull bar and back nut is disengaged from engagement status, and when turning to complete disengaged condition, mould shifting oil cylinder is started working, promotion moving die plate moves to mould shifting oil cylinder stroke and only completes to the direction that front template is contrary, die sinking completes.
Adopt above structure, the present invention compared with prior art, have the following advantages: adopt the present invention, during folding mould, shifting formwork can be carried out to moving die plate by mould shifting oil cylinder, and drive bull gear to rotate by driving mechanism, through the amplification of bull gear moment, before driving, nut and pull bar rotate together, because back nut is fixed on moving die plate, himself cannot rotate, therefore be translated into the rectilinear motion on pull bar, thus realize locked mode, the auto-lock function of screw thread is utilized to realize locked mode, without the need to multiple Mode-locking oil cylinder, hydraulic system is simple, by the energy consumption utilizing the self-locking between mechanism to reduce locked mode.
As preferably, in matched moulds process, actuating unit is started working and is referred to, hydraulic motor drives pinion to rotate forward to drive bull gear to rotate; In die sinking process, actuating unit drives bull gear reversion to refer to, hydraulic motor drives pinion reversion to drive bull gear to rotate.
As preferably, in die sinking process, complete disengaged condition refers to, the position of locating slot detected by displacement transducer, thus judges that engagement is thrown off, and now, displacement transducer will feed back signal to controller, and controller sends the signal of cutting-off liquid pressure motor oil circuit.
As preferably, external screw thread on described pull bar is two parts screw thread distributed that is centrosymmetric in pull bar circumference, it is unthreaded sections between two parts screw thread, unthreaded sections is annular polished rod structure, the diameter of annular polished rod structure is less than bottom diameter, and described back nut is provided with the respective threaded matched with two parts screw thread on pull bar.Adopt this structure, when needing locked mode, provide clamp force by the engagement force produced during screw-threaded engagement, when needs rapid mould-moving, owing to being partial thread formation, can departing between back nut with pull bar and engage, can rapid mould-moving motion smoothly by mould shifting oil cylinder.
As preferably, pull bar between front nut and solid plate is arranged with spring, solid plate is provided with the spring cavity of putting spring, pull bar is provided with a shaft shoulder near solid plate end, the shaft shoulder offers cannelure, be equipped with T-shaped block in described cannelure, one end of spring is fixed on T-shaped block, and the other end withstands on solid plate.The spring coefficient of stiffiness is comparatively large, can produce larger spring force, makes pull bar produce distortion, and when avoiding engaging, the screw thread of pull bar and back nut screw thread produce and interfere next time.
As preferably, pull bar and front nut are equipped with keyway, for key is connected between pull bar with front nut.Connected by key, can realize smoothly driving pull bar to rotate by front nut.
As preferably, offer locating slot at pull rod shaft unthreaded sections upwards, described back nut is provided with the displacement transducer put for detection and location slot.By the position of displacement transducer detection and location groove, thus judge whether back nut engages with pull bar, to send folding mould signal, make mould shifting oil cylinder action.
Accompanying drawing explanation
Fig. 1 is the axis side view of two-plate injection machine matched molds apparatus;
Fig. 2 is the front view of two-plate injection machine matched molds apparatus;
Fig. 3 is the right view of Fig. 2;
Fig. 4 is the left view of Fig. 2;
Fig. 5 is the structural representation of pull bar;
Fig. 6 is the right view of Fig. 5.
As shown in the figure, 1, solid plate, 2, moving die plate, 3, pull bar, 4, mould shifting oil cylinder, 5, front nut, 6, back nut, 7, bull gear, 8, spring, 9, spring cavity, 10, the shaft shoulder, 11, cannelure, 12, T-shaped block, 13, locating slot, 14, displacement transducer, 15, key, 16, controller, 17, keyway.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the invention will be further described, but the present invention is not restricted to these embodiments.
The present invention contain any make on marrow of the present invention and scope substitute, amendment, equivalent method and scheme.To have the present invention to make the public and understand thoroughly, in the following preferred embodiment of the present invention, describe concrete details in detail, and do not have the description of these details also can understand the present invention completely for a person skilled in the art.In addition, the needs in order to illustrate in the accompanying drawing of the present invention, completely accurately do not draw according to actual ratio, are explained at this.
As shown in figures 1 to 6, the folding modeling method of a kind of two-plate injection machine matched molds apparatus involved in the present invention, based on two-plate injection machine matched molds apparatus, described two-plate injection machine matched molds apparatus comprises solid plate 1, moving die plate 2, pull bar 3 and mould shifting oil cylinder 4, described solid plate 1 is arranged on one end of pull bar 3, described moving die plate 2 is sheathed on the other end of pull bar 3, and the piston end of described mould shifting oil cylinder 4 is connected to drive it to move with moving die plate 2;
Described injection machine matched molds apparatus also comprises front nut 5, back nut 6, bull gear 7 and the actuating unit driving bull gear 7 to rotate, described front nut 5 is with pull bar 3 one_to_one corresponding and be fixed on the solid plate side of pull bar 3, described pull bar 3 is provided with the external screw thread coordinated with back nut 6, described back nut 6 is also fixedly connected on moving die plate 2 with pull bar 3 one_to_one corresponding, be combined on pull bar 3, the outer rim of front nut 5 is arranged to gear-like, described bull gear 7 engages with each front nut 5 respectively, before bull gear 7 drives under the driving of actuating unit, nut 5 rotates,
Described folding modeling method, comprises the following steps:
Matched moulds process: mould shifting oil cylinder pulls moving die plate to move to oil cylinder stroke to solid plate direction to complete only, actuating unit is started working, drive bull gear rotates, nut rotation before bull gear rotates and drives, front nut drives pull bar to rotate, and pull bar rotates and makes pull rod screw and back nut screw-threaded engagement, and back nut is moved axially at pull bar, until complete matched moulds, pull bar deformation is to clamp force required value.In this process, locked mode relies on the auto-lock function of the screw thread between pull bar and back nut to realize completely, and mould assembling action completes;
Die sinking process: after part cooling, actuating unit drives bull gear reversion, nut rotation before bull gear drives, front nut drives pull bar to rotate, pull bar rotates and pull bar and back nut is disengaged from engagement status, and when turning to complete disengaged condition, mould shifting oil cylinder is started working, promotion moving die plate moves to mould shifting oil cylinder stroke and only completes to the direction that front template is contrary, die sinking completes.
In matched moulds process, actuating unit is started working and is referred to, hydraulic motor drives pinion to rotate forward to drive bull gear to rotate; In die sinking process, actuating unit drives bull gear reversion to refer to, hydraulic motor drives pinion reversion to drive bull gear to rotate.
In die sinking process, complete disengaged condition refers to, the position of locating slot detected by displacement transducer, thus judge that engagement is thrown off, now, displacement transducer will feed back signal to controller, and controller sends the signal (even if actuating unit break-off) of cutting-off liquid pressure motor oil circuit.
Such scheme is further limited: pull bar is fixed on solid plate by described front nut.The quantity of pull bar 3 is consistent with prior art, is four.The installation of described bull gear can realize in the following manner: namely on solid plate 1, install a disk, described bull gear 7 is arranged on disk outer rim, is provided with steel ball therebetween, and bull gear 7 and disk are rotatably connected, just as the structure of bearing; Also by arranging multiple bearing post according to circumferential arrangement on solid plate, described bull gear is sheathed on bearing post, and bearing post both also can allow its smooth rotation to its location.Though the structure of above embodiment is not illustrated in the drawings, those of ordinary skill in the art all can understand and implement according to foregoing description.
The pinion that described actuating unit is hydraulic motor and engages with bull gear, hydraulic motor work drives pinion, pinion drives bull gear to rotate to drive front nut rotation, thus pull bar is rotated, back nut is fixed because being moved template, therefore will the rectilinear motion on pull bar be converted into, to realize matched moulds.
External screw thread on described pull bar 3 is two parts screw thread distributed that is centrosymmetric in pull bar 3 circumference, it is unthreaded sections between two parts screw thread, unthreaded sections is annular polished rod structure, the diameter of annular polished rod structure is less than bottom diameter, and described back nut 6 is provided with the respective threaded matched with two parts screw thread on pull bar 3.Based on said structure, when needing locked mode, clamp force is provided by the engagement force produced during screw-threaded engagement, when needs rapid mould-moving, owing to being partial thread formation, can depart between back nut with pull bar and engage (namely the screw thread of back nut is facing to the annular polished rod structure of pull bar), can be moved by rapid mould-moving smoothly by mould shifting oil cylinder.The monolateral angle of wherein a part of screw thread 50 °-60 ° in two parts screw thread of pull bar, unthreaded sections is annular polished rod structure, and monolateral annular angle is 120 °-130 °; Described back nut also makes partial threads shape, the angle of thread 50 °-60 °, and unthreaded sections angle is 120 °-130 °.
Pull bar 3 between front nut 5 and solid plate 1 is arranged with spring 8, solid plate 1 is provided with the spring cavity 9 of putting spring 8, pull bar 3 is provided with a shaft shoulder 10 near solid plate 1 end, the shaft shoulder 10 offers cannelure 11, T-shaped block 12 is equipped with in described cannelure 11, one end of spring 8 is fixed on T-shaped block 12, and the other end withstands on solid plate 1.Before actuating unit driving when nut, front nut drives pull bar to rotate, due to the design of T-shaped block, spring can rotate thereupon, and after self-locking terminates, during die sinking, the effect of spring can prevent harmful rotation of pull bar, therefore adopts the spring that the coefficient of stiffiness is larger, produces larger spring force, make pull bar produce distortion, when avoiding engaging, the screw thread of pull bar and back nut screw thread produce and interfere next time.
Pull bar 3 and front nut 5 are equipped with keyway 17, are connected for key 15 between pull bar 3 with front nut 5.Connected by key, can realize smoothly driving pull bar to rotate by front nut.In order to increase moment of torsion, keyway can offer into spline, and key is chosen as spline.
Offer locating slot 13 at pull bar 3 unthreaded sections axially, described back nut 6 is provided with the displacement transducer 14 for detection and location groove 13 position.The chord length of locating slot is 10-20mm, the degree of depth is the position of 5-8mm by displacement transducer detection and location groove, thus judges whether back nut engages with pull bar, to send folding mould signal, by Signal transmissions to controller, control mould shifting oil cylinder by controller and act accordingly.
Pull rod screw and back nut thread surface all adopt intensive treatment, and to improve its intensity, hardness and wearability, meanwhile, pull bar and nut use the different material of hardness as steel and bronze.In order to increasing friction force, improve self-locking property, lead angle gets 15-20 °.
Below only just preferred embodiment of the present invention is described, but can not be interpreted as it is limitations on claims.The present invention is not only confined to above embodiment, and its concrete structure allows to change.In a word, all various changes done in the protection domain of independent claims of the present invention are all in protection scope of the present invention.
Claims (7)
1. the folding modeling method of a two-plate injection machine matched molds apparatus, based on two-plate injection machine matched molds apparatus, described two-plate injection machine matched molds apparatus comprises solid plate (1), moving die plate (2), pull bar (3) and mould shifting oil cylinder (4), described solid plate (1) is arranged on one end of pull bar (3), described moving die plate (2) is sheathed on the other end of pull bar (3), and the piston end of described mould shifting oil cylinder (4) is connected to drive it to move with moving die plate (2); It is characterized in that:
Described injection machine matched molds apparatus also comprises front nut (5), back nut (6), bull gear (7) and the actuating unit driving bull gear (7) to rotate, described front nut (5) and pull bar (3) one_to_one corresponding are also fixed on the solid plate side of pull bar (3), described pull bar (3) is provided with the external screw thread coordinated with back nut (6), described back nut (6) is also fixedly connected on moving die plate (2) with pull bar (3) one_to_one corresponding, be combined on pull bar (3), the outer rim of front nut (5) is arranged to gear-like, described bull gear (7) engages with each front nut (5) respectively, before bull gear (7) drives under the driving of actuating unit, nut (5) rotates,
Described folding modeling method comprises the following steps:
Matched moulds process: mould shifting oil cylinder pulls moving die plate to move to oil cylinder stroke to solid plate direction to complete only, actuating unit is started working, drive bull gear rotates, nut rotation before bull gear rotates and drives, front nut drives pull bar to rotate, and pull bar rotates and makes pull rod screw and back nut screw-threaded engagement, and back nut is moved axially at pull bar, until complete matched moulds, pull bar deformation is to clamp force required value;
Die sinking process: after part cooling, actuating unit drives bull gear reversion, nut rotation before bull gear drives, front nut drives pull bar to rotate, pull bar rotates and pull bar and back nut is disengaged from engagement status, and when turning to complete disengaged condition, mould shifting oil cylinder is started working, promotion moving die plate moves to mould shifting oil cylinder stroke and only completes to the direction that front template is contrary, die sinking completes.
2. the folding modeling method of two-plate injection machine matched molds apparatus according to claim 1, it is characterized in that: in matched moulds process, actuating unit is started working and is referred to, hydraulic motor drives pinion to rotate forward to drive bull gear to rotate; In die sinking process, actuating unit drives bull gear reversion to refer to, hydraulic motor drives pinion reversion to drive bull gear to rotate.
3. the folding modeling method of two-plate injection machine matched molds apparatus according to claim 2, it is characterized in that: in die sinking process, complete disengaged condition refers to, the position of locating slot is detected by displacement transducer, thus judge that engagement is thrown off, now, displacement transducer will feed back signal to controller, and controller sends the signal of cutting-off liquid pressure motor oil circuit.
4. the folding modeling method of two-plate injection machine matched molds apparatus according to claim 1, it is characterized in that: the external screw thread on described pull bar (3) is two parts screw thread distributed that is centrosymmetric in pull bar (3) circumference, it is unthreaded sections between two parts screw thread, unthreaded sections is annular polished rod structure, the diameter of annular polished rod structure is less than bottom diameter, and described back nut (6) is provided with the respective threaded that two parts screw thread upper with pull bar (3) matches.
5. the folding modeling method of the two-plate injection machine matched molds apparatus according to claim 1 or 4, it is characterized in that: the pull bar (3) between front nut (5) and solid plate (1) is arranged with spring (8), solid plate (1) is provided with the spring cavity (9) of putting spring (8), pull bar (3) is upper is provided with a shaft shoulder (10) near solid plate (1) end, the shaft shoulder (10) offers cannelure (11), T-shaped block (12) is equipped with in described cannelure (11), one end of spring (8) is fixed on T-shaped block (12), the other end withstands on solid plate (1).
6. the folding modeling method of two-plate injection machine matched molds apparatus according to claim 4, it is characterized in that: on pull bar (3) and front nut (5), be equipped with keyway, for key is connected between pull bar (3) with front nut (5).
7. the folding modeling method of two-plate injection machine matched molds apparatus according to claim 4, it is characterized in that: offer locating slot (13) at pull bar (3) unthreaded sections axially, described back nut (6) is provided with the displacement transducer (14) for detection and location groove (13) position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410827703.1A CN104527002B (en) | 2014-12-26 | 2014-12-26 | The open mold method of two-plate injection machine matched molds apparatus |
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| CN201410827703.1A CN104527002B (en) | 2014-12-26 | 2014-12-26 | The open mold method of two-plate injection machine matched molds apparatus |
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| CN104527002A true CN104527002A (en) | 2015-04-22 |
| CN104527002B CN104527002B (en) | 2018-01-30 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107877810A (en) * | 2017-11-16 | 2018-04-06 | 江门市汇力精密机械有限公司 | A kind of injection machine mode transfer structure |
| CN113246420A (en) * | 2020-09-09 | 2021-08-13 | 伊之密精密机械（苏州）有限公司 | Clamping force control method and injection molding machine |
| CN113787686A (en) * | 2021-07-28 | 2021-12-14 | 海天塑机集团有限公司 | Mold opening method and system for two-plate injection molding machine of spring mold |
| CN115042396A (en) * | 2022-03-14 | 2022-09-13 | 安徽瑞塑精工科技有限公司 | Mold opening and closing mechanism of band-type-brake-free two-plate injection molding machine |
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| CN101774238A (en) * | 2009-12-10 | 2010-07-14 | 中山全立发机械有限公司 | Double-template mould-clamping mechanism |
| CN102837404A (en) * | 2012-09-06 | 2012-12-26 | 泰瑞机器制造(中国)有限公司 | Mould-assembling mechanism for injection molding machine and balancing and adjusting method for mould-assembling force thereof |
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| CN2832494Y (en) * | 2005-07-11 | 2006-11-01 | 亿利达机器(深圳)有限公司 | Contracting brake type mode locking structure for plastic jetting-moulding machine |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107877810A (en) * | 2017-11-16 | 2018-04-06 | 江门市汇力精密机械有限公司 | A kind of injection machine mode transfer structure |
| CN113246420A (en) * | 2020-09-09 | 2021-08-13 | 伊之密精密机械（苏州）有限公司 | Clamping force control method and injection molding machine |
| CN113246420B (en) * | 2020-09-09 | 2022-04-08 | 伊之密精密机械（苏州）有限公司 | Clamping force control method and injection molding machine |
| CN113787686A (en) * | 2021-07-28 | 2021-12-14 | 海天塑机集团有限公司 | Mold opening method and system for two-plate injection molding machine of spring mold |
| CN115042396A (en) * | 2022-03-14 | 2022-09-13 | 安徽瑞塑精工科技有限公司 | Mold opening and closing mechanism of band-type-brake-free two-plate injection molding machine |
| CN115042396B (en) * | 2022-03-14 | 2024-02-27 | 安徽瑞塑精工科技有限公司 | Switch die mechanism of band-type brake-free two-plate injection molding machine |
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| CN104527002B (en) | 2018-01-30 |
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Inventor after: Rao Binqi Inventor after: Zhou Hongwei Inventor after: Yao Lixian Inventor after: He Ying Inventor after: Pan Hongwei Inventor after: OUYANG HUABING Inventor before: Rao Binqi Inventor before: Zhou Hongwei Inventor before: Pan Hongwei Inventor before: OUYANG HUABING |
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Effective date of registration: 20180110 Address after: 310018, No. 245, Wen Ze North Road, Xiasha street, Hangzhou economic and Technological Development Zone, Hangzhou, Zhejiang Applicant after: TEDERIC Machinery Co.,Ltd. Address before: 315470 Zhejiang Province, Yuyao City Simen Town Guangming Road No. 126 Applicant before: Rao Binqi |