CN1050086C - Mould holding device and method for crankshaft injection moulder - Google Patents
Mould holding device and method for crankshaft injection moulder Download PDFInfo
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- CN1050086C CN1050086C CN94119391A CN94119391A CN1050086C CN 1050086 C CN1050086 C CN 1050086C CN 94119391 A CN94119391 A CN 94119391A CN 94119391 A CN94119391 A CN 94119391A CN 1050086 C CN1050086 C CN 1050086C
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- servo motor
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Abstract
The present invention relates to a mould holding device for a crankshaft injection moulder and a mould holding method thereof. A servo motor arranged on a back stationary plate is used for driving double leading screw rods which are provided with a balancing device to drive double external crankshaft mechanisms to do the actions of unlocking a mould and locking the mould; a servo motor fixed on a movable plate is used for driving a screw cap to rotate so as to drive the leading screw rods and a push rod to do linear translation to complete the actions of advancing and withdrawing of the push rod; an electromotor on the back stationary plate is used for driving a mould regulating mechanism to realize quick automatic mould regulation through the assistance of the servo motor on the stationary plate.
Description
The present invention is relevant for a kind of clamping die device of toggle formula Jet forming machine.
General traditional Jet forming machine includes four parts such as board, sandwich mold unit, injection unit and oil pressure electric-control system substantially.Wherein sandwich mold unit A (consulting Fig. 1) mainly is by the forward and backward quiet plate A1, the A2 that are located on the board, and two couples of parallel tie-rod A3 that are packed in its place, quadripolar corners corner, the formations such as moving plate A4 that cooperation can be slided on these tie-rods A3.Should moving plate A4 with the quiet plate A2 in back between be that musical form toggle mechanism A5 connects in one group on the mat, and driven by the clamping oil hydraulic cylinder A6 of a device on the quiet plate A2 in back, make its energy forward-reverse, thereby with preceding quiet plate A1 clamping or release from, to reach the effect of open and close mould.Because the big or small thickness of various moulds is not a unanimity; therefore must adjust the position of the quiet plate A2 in back; thickness that can matched mold; to set up suitable clamp force; so generally on the quiet plate A2 in back, be provided with one group of mould adjusting mechanism in addition; it mainly is that end at this each tie-rod A3 forms trapezoidal spiro tooth part A31; spiral shell is being adorned corresponding nut gear A32 on it; on the quiet plate A2 in this back, install several rollers A21 in addition; this roller A21 just can surround a circular trace and overlap on it for an annular gear wheel A22 frame; lucky and the nut gear A32 engagement of the tooth of this annular gear wheel A22; and be installed in the hydraulic motor A7 of back on the quiet plate A2 in its one of bridle joint in bottom; when hydraulic motor A7 rotates; external tooth on the hydraulic motor A7 axle directly drives the external tooth of ring-type gear A 22, and this annular gear wheel A22 is turned, and interlock nut gear A32 makes its rotation and follows spiro tooth part A31 and move; pass the position of the quiet plate A2 in back simultaneously, to obtain the thick distance of suitable mould.In addition liftout attachment is to drive knock pin and advance or retreat by ejecting oil hydraulic cylinder A8, so that the moulding product are finished demoulding demand.
When reality is used; with interior musical form double-toggle clamping mechanism; the situation of its mold closing B1 and die sinking B2 as shown in Figure 2; the length limited that can learn connecting rod B12 is in the size of the quiet plate B15 in back; and the length of connecting rod B11 then need be considered the space that ejecting mechanism B16 is required; to avoid the generation of interference situations; so; the design that makes this toggle formula mechanism is faced the limitation in space; the characteristic of its mechanism can't be given full play of; and connecting rod holder B13; B14 must be positioned at the outer rim of moving plate B3 and the quiet plate B15 in back; so the position that connecting rod is supported is in outer rim; and moving plate stress area so will form bigger template deformation amount, with the quality of remote-effects moulding product in middle section (i.e. the zone that contacts with template).General small-sized ejaculator adopts the toggle mechanism C (consulting Fig. 3) of five-point type, and so under the restriction of identical moving plate aperture (moving plate stroke), gained mechanical force value of magnification will be little than four-point toggle mechanism D.
Known ejaculator is to use oil pressure to make drive source, right oil hydraulic system is except that the assembling maintenance is difficult for, its positioning control characteristic is also undesirable, and the formed noise of oil pressure pump, vibration and oil gas will influence the environment of work, in addition it needs install sensor additional at the quiet plate in back when making automatic mold-adjustment, and uses two fens approximatiosses or statistical notion, it is thick to adjust the mould that needs in trial and error pricing mode (try anderror), not only consuming time and establishment and computing control software are also complicated.It is very big that other ejects oil hydraulic cylinder configuration requisite space, will pin down the design of toggle mechanism and the size of the moving plate A4 of influence quiet plate A2 configuration requisite space to the back.
In sum, it is as follows to commonly use the shortcoming of clamping die device of Jet forming machine:
1, drives with hydraulic type, be difficult for mode transfer, easily pollute.
2, unbalanced, the difficult location of clamp force.
3, the limited maintenance difficult in space.
4, mould and die accuracy susceptible to, the quality stability and the precision of moulding product are not good enough.
5, oil hydraulic system is difficult for doing acceleration and deceleration control, vibrates acutely during mechanism kinematic, and element is easily impaired.
The clamping die device that the objective of the invention is to overcome the shortcoming of prior art and the toggle formula Jet forming machine of the quick mode transfer of a kind of energy is provided, mat is equipped on servo motor and the two driving screw device on the quiet plate in back, replace and commonly use the clamping oil hydraulic cylinder, servo motor and driving screw device on the moving plate of mat replace the ejecting mechanism of commonly using, electronic mode transfer motor behind the mat on the quiet plate replaces the hydraulic motor of commonly using, to realize the type of drive of full electric, the pollutions such as noise, vibration and oil gas of avoiding oil pressure pump that working environment is caused.
The objective of the invention is to reach as follows:
A kind of clamping die device of toggle formula Jet forming machine, comprise the preceding quiet plate, the quiet plate in back, moving plate, tie-rod, servo motor, outer musical form toggle mechanism, mode transfer and the liftout attachment that are located on the board, it is characterized in that: use servo motor to drive two driving screws of tool bascule, driving the unblank mould action of outer musical form toggle mechanism, but this bascule by the two sealed balance that communicates two driving screws stressed, set up balanced clamp force and absorb when forming pitch error and die sinking between two screw rods the precompressed hydraulic cylinder of impulsive force and form.
Purpose of the present invention can also following mode reach: the clamping die device of described toggle formula Jet forming machine, it is characterized in that: the ejecting mechanism on this clamping die device is to use servo motor driven, see through the transmission mechanism rotary nut, and be combined with the guiding of guide plate, guide bar, to drive driving screw and knock-pin moving linearly, finish ejecting, pushing up the action of moving back.
Technical characterictic of the present invention is as follows compared with the prior art:
The present invention
1, full electric type of drive
2, servo motor drives two driving screws of tool bascule, does the action of die sinking and locked mode to drive outer musical form toggle mechanism.
3, make full use of limited space, drive the nut rotation, move as straight line, finish ejecting and pushing up the action of moving back with drive screw and knock-pin with the servo motor that is fixed on the moving plate.
4, with the electrical motor driven mould adjusting mechanism on the quiet plate in back, see through the assistance of servo motor on the quiet plate, can reach the purpose that fast automatic mode transfer is also set up the clamp force of setting.
Prior art
1, uses the hydraulic type type of drive.
2, drive the action that interior musical form toggle mechanism is made die sinking and locked mode with oil hydraulic cylinder.
3, drive knock-pin with oil hydraulic cylinder and move as straight line, finish ejecting or pushing up the action of moving back, institute takes up space very big.
4, drive mould adjusting mechanism with the hydraulic motor of back on the quiet plate,, see through the assistance of sensor on the quiet plate, and can reach automatic mold-adjustment and set up the purpose of the clamp force of setting in two fens approximatiosses mode with trial and error pricing.
Effect of the present invention is:
1, full electric drives, quickly and accurately mode transfer, pollution-free.
2, clamp force equilibrium, easy location.
3, can effectively utilize the space, institutional arrangement is easy.
4, can effectively protect mould and die accuracy, improve the quality stability and the precision of moulding product.
5, effectively controlling organization acceleration and deceleration make action smooth-going, quiet.
Graphic simple declaration:
Fig. 1 is the three-dimensional view of known ejaculator clamping die device.
Fig. 2 opens for known ejaculator clamping die device, the schematic diagram of mode-lock status.
Fig. 3 is the schematic diagram of known ejaculator clamping die device five-point type and four-point toggle mechanism.
Fig. 4 A is the vertical view of clamping die device die opening state of the present invention.
Fig. 4 B is the vertical view of clamping die device mode-lock status of the present invention.
Fig. 5 is a clamping die device precompressed hydraulic cylinder zoomed-in view of the present invention.
Fig. 6 A is the front view of clamping die device die opening state of the present invention.
Fig. 6 B is the front view of clamping die device mode-lock status of the present invention.
Fig. 7 is the left view of clamping die device of the present invention.
Fig. 8 is the left view of clamping die device liftout attachment of the present invention.
Fig. 9 is the front view of clamping die device liftout attachment of the present invention.
Figure 10 is nut of the present invention and moving plate graph of relation.
Figure 11 is a clamping method flow diagram of the present invention.
Figure 12 is the principle schematic of toggle mechanism of the present invention.
The present invention will cooperate the graphic back that is described in more detail in:
At first see also Fig. 4 A and 4B, it is the vertical view that is respectively sandwich mold unit die sinking of the present invention and locked mode, clamping die device of the present invention mainly is that cooperating slidably, the institutes such as moving plate 6 on tie-rod 4 and slide block 5 constitute by preceding quiet plate 2, the quiet plate 3 in back and two pairs of parallel tie-rods 4 that are packed in its place, quadripolar corners corner of being located on the board 1 (shown in Fig. 6 A, 6B).The toggle mechanism 7 that between the quiet plate 3 of moving plate 6 and back is one group of outer musical form of mat connects, and by servo motor 8 drivings of a device in quiet plate 3 upper ends, back, see through driving wheel 9 on the axle center of motor, the time rule belt 10, idle pulley 11 and driven pulley 12 transmission (please consulting Fig. 7 simultaneously), make the driving screw 16 turn nuts 17 that support with bearing 13, bearing cap 14, inside and outside spacer ring 15, along driving screw 16 moving linearlies, outer musical form toggle mechanism 7 is opened to drive, the action of locked mode.The present invention can make its positioning accuracy be improved, and not have the worry of oil vapour pollution owing to utilize servo motor 8 to drive the transmission mechanism of driving screw or nut, and the assembling maintenance is also very convenient.The outer musical form toggle mechanism of four-point system is fixed in the moving plate fixed arm 22 of moving plate 6 rear sides and does not have 23,24,25,26 compositions of pivot pin of giving oil bearing by being connected in the actuating arm 18 of guiding push pedal 27, back quiet plate fixed arm 19, postbrachium 20, the forearm 21 that is fixed in quiet plate 3 front sides, back.The present invention is the load of low driving screw of begging to surrender, and the balanced clamp force of foundation, so mode that the present invention adopts two driving screws 16 to drive, right in guaranteeing to reach above-mentioned effect, must make the stress equalization of two driving screws, and the impulsive force that is difficult to avoid in the time of can absorbing pitch error amount that two 16 of driving screws may form and unblank mould, so the present invention is equiped with the precompressed hydraulic cylinder 28 that sealing communicates at nut 17 with 27 of push pedals of guiding is with as the bascule that cushions usefulness.See also Fig. 5, be precompressed hydraulic cylinder enlarged drawing of the present invention, this precompressed hydraulic cylinder 28 has the precompressed clearance C, constituted with the cover plate 32 at guiding push pedal 27 two ends by piston body 29, sealing 30, high pressure resistant liquid 31, use lock screw 33 and packing ring 34 force pressing spring 35 will guide push pedal 27 and piston body 29 fixed, nut 17 uses screws 68 to be fixed with piston body 29 and is integral, the pressure of two precompressed hydraulic cylinders 28 by two pipe joints 36, and a pipe 37 that is communicated with make balance.The present invention is through using two driving screws to drive outer musical form toggle mechanism, to reduce the load that drives with single driving screw, and for making two driving screw stress equalizations, and the impulsive force that is difficult to avoid can absorb the pitch error amount that may form between two driving screws and unblank mould the time, so seal the precompressed hydraulic cylinder 28 that communicates at nut 17 and 27 installings of guiding push pedal, and nut 17 is consolidated with piston body 29, so nut 17 is subjected to the effect of piston body 29 balances, so can reach the effect of splendid buffering shock-absorbing.
With reference to Fig. 7, mode transfer device of the present invention, be to replace the hydraulic motor of commonly using with an electro-motor, it is to be installed in the annular gear wheel 40 that the electronic mode transfer motor 38 on the quiet plate 3 in back drives with roller 39 support fixation with one, 41 rotations of linkage nut gear, make the quiet plate 3 in back do forward and backward moving, and cooperate the detecting of clamping servo motor encoder and current sensor (not shown), finish the action demand of the mode transfer of die change fast.
Moreover liftout attachment 42 of the present invention (seeing also Fig. 6 A, 6B, 8,9) is to put 7 of two toggle mechanisms, to make full use of the space of 6 of quiet plate 3 in back and moving plates, impels clamping die device length to shorten as far as possible.This liftout attachment 42 mainly includes servo motor 43, transmission mechanism 44, bearing 45,55, bearing inner sleeve 46, bearing outside 47, bearing cap 48, Bearing washer 49, screw 50, bearing locking nut 51, guide plate 52, guide bar 53, knock-pin 54 compositions such as grade, one screw 56 runs through nut 58, driven pulley 57 is screwed together in bearing inner sleeve 46, bearing outside 47 is locked in moving plate 6 with screw 59, it is driven by servo motor 43 and advises, see through the driving wheel 60 of transmission mechanism 44, time rule belt 61, driven pulley 57, element transmissions such as nut 58 and driving screw 62, by the guiding of guide plate 52 with guide bar 53, make knock-pin 54 moving linearlies, eject to finish, the action request that move back on the top.Guide plate 52 is to combine with driving screw 62 with screw 63, and is provided with a crashproof elastomer 64 in guide plate 52, and guide bar 53 ends are with screw 65 locking one baffle plate 66 and crashproof elastomers 67.
The present invention utilizes the design of outcurve four-point toggle mechanism, cooperate on the moving plate 6 and watch motor 43 rotary nuts 58, to drive driving screw 62 and knock-pin 54 straight-line modes, can make full use of the space of 6 of quiet plate 3 in back and moving plates, impel clamping die device length to shorten as far as possible.
The present invention removes the foregoing description, also following expansion can be arranged:
A, servo motor of use drive single driving screw, to drive the clamping die device of toggle mechanism.
B, two servo motors of use drive its driving screw (pitch difference) respectively, make to reach fast the clamping die device of locked mode at a slow speed.
C, mould adjusting mechanism are to use chain and gear-driven clamping die device.
The quick method for adjusting mould of clamping of the present invention, the flow process (please consulting Figure 11 simultaneously) as described below of clamp force is set in its automatic mold-adjustment and foundation:
At first, can get by formula
F＝4·δx?A’E’/1
F: clamp force
δ x: tie-rod amount of tension
E ': young's modulus
A ': tie-rod sectional area
1: the tie-rod length overall
Set clamp force F and mold thickness earlier, can converse the amount of tension δ x that needs stretching tie-rod 4, find out the matched moulds position (this arrival locked mode final position apart from nut is that toggle mechanism stretches the amount of δ m) of nut again through nut 17 and the relation curve (as shown in figure 10) of moving plate 6 both positions, mode with low pressure low speed drives nut 17 to the matched moulds position then, servo motor 8 position brakes, mode transfer motor 38 is just being changeed with before the driving mode transfer and then to public, the master mold contact, make the electric current of mode transfer motor 38 to increase severely because of reaching mechanical dead-centre position, see through the sensing of current sensor, mode transfer motor 38 cuts out, promptly finish mode transfer; If nut 17 can't arrive the matched moulds position, will be by servo motor 8 encoder perception, then servo motor 8 continues to provide low torsion, mode transfer motor 38 counter-rotatings simultaneously, be that mode transfer motor 38 is moving together with servo motor 8, during to nut 17 to the matched moulds position, mode transfer motor 38 brakes simultaneously with servo motor 8, can guarantee that nut 17 is on the matched moulds position this moment, because of it is controlled accurately by servo motor 8, but it is public, master mold may not contact (due to the error that may cause because of mode transfer motor 38 location), so make mode transfer motor 38 just change again, to eliminate public affairs, the gap of master mold is surveyed by current sensor and to be closed mode transfer motor 38 after an electric current is promoted to certain definite value suddenly, promptly finish the mode transfer action, so, (can be recorded by the contact limit switch) when toggle mechanism stretches, near amount can stretch tie-rod 4, impel and set up out required clamp force F, to finish mode transfer fast.Figure 10 is the matched moulds location diagram of nut 17 and moving plate 6, system is tried to achieve with experiment method by theoretical, experiment method is to use position sensor, detect the position of nut 17 and moving plate 6 respectively, after recorder trace, with the data input computer, and find out both and be worth in correspondence with each other, as shown in figure 10, coordinate unit is that mm wherein one represents theoretical value, o represents experiment value, the two coincide mutually, and experiment value is the tolerance of each elbow connection rod size, is controlled at the result of 0.1mm with interior gained, theoretical value is by the derivation of equation, as shown in figure 12:
A: forearm 21 length of connecting rods
B: postbrachium 20 length of connecting rods
D: actuating arm 18 length of connecting rods
E: the axial vertical range of pivot pin 24 and pivot pin 26
H: the axial vertical range of pivot pin 25 and pivot pin 26
δ x: tie-rod amount of tension (promptly moving plate 6 stretches a little distance apart from toggle mechanism)
δ m: nut 17 positions
δ: parameter
Φ: actuating arm 18 and the axial angle of driving screw
θ: the axial angle of postbrachium 20 on pivot pin 26
Φ o: forearm 21, the postbrachium 20 Φ angle in line the time
Kb: the distance of pivot pin 25 and pivot pin 26
θo＝Sin
-1(H/(A+B))
Φo＝Sin
-1((E-B?Sinθo)/D)
δ＝((A+B)
2-H
2)0.5-δx
Kb＝(δ
2+H
2)
0.5
θ＝cos
-1[(B
2+Kb
2-A
2)/(2B·Kb)]+tan
-1(H/δ)
Φ＝sin
-1((E-Bsinθ)/D)
When forearm 21, postbrachium 20 in line the time, the horizontal range that nut and O are ordered is
Bcosθo?-DcosΦo——(A)
When moving platen was return δ x amount, the horizontal range that nut and O are ordered was
Bcosθ-DcosΦ——(B)
Therefore, when the position that nut stretches with connecting rod is an initial point, then δ m subtracts (B) formula promptly for (A) formula
δm＝Bcosθo-DcosΦo-(Bcosθ-DcosΦ)
＝B(cosθo-cosθ)-D(cosΦo-cosΦ)
δm＝Bcosθo-cosθ)-D(cosΦo-cosΦ)
Each connecting rod size of above-listed input and δ x value can be tried to achieve δ m value.
Claims (2)
1, a kind of clamping die device of toggle formula Jet forming machine, comprise the preceding quiet plate, the quiet plate in back, moving plate, tie-rod, servo motor, outer musical form toggle mechanism, mode transfer and the liftout attachment that are located on the board, it is characterized in that: use servo motor to drive two driving screws of tool bascule, driving the unblank mould action of outer musical form toggle mechanism, but this bascule by the two sealed balance that communicates two driving screws stressed, set up balanced clamp force and absorb when forming pitch error and die sinking between two screw rods the precompressed hydraulic cylinder of impulsive force and form.
2, the clamping die device of toggle formula Jet forming machine as claimed in claim 1, it is characterized in that: the ejecting mechanism on this clamping die device is to use servo motor driven, see through the transmission mechanism rotary nut, and be combined with the guiding of guide plate, guide bar, to drive driving screw and knock-pin moving linearly, finish ejecting, pushing up the action of moving back.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94119391A CN1050086C (en) | 1994-12-03 | 1994-12-03 | Mould holding device and method for crankshaft injection moulder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94119391A CN1050086C (en) | 1994-12-03 | 1994-12-03 | Mould holding device and method for crankshaft injection moulder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1123735A CN1123735A (en) | 1996-06-05 |
| CN1050086C true CN1050086C (en) | 2000-03-08 |
Family
ID=5039196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94119391A Expired - Lifetime CN1050086C (en) | 1994-12-03 | 1994-12-03 | Mould holding device and method for crankshaft injection moulder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1050086C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108688108A (en) * | 2017-03-31 | 2018-10-23 | 住友重机械工业株式会社 | Injection (mo(u)lding) machine and industrial machine |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102069575B (en) * | 2009-11-20 | 2013-04-10 | 北京化工大学 | Mold adjusting and locking device of plastic injection molding machine |
| CN101913236B (en) * | 2010-08-05 | 2013-04-24 | 华南理工大学 | Control system and method of opening-closing die motor and push-out motor of fully-electric injection molding machine |
| CN103895149B (en) * | 2012-12-31 | 2016-08-24 | 成纶企业股份有限公司 | The plastic object forming method more than injection locomotive wall size |
| DE102015109840B3 (en) * | 2015-06-19 | 2016-07-21 | Netstal-Maschinen Ag | Toggle clamping unit for an injection molding machine |
| CN110238367B (en) * | 2019-06-05 | 2024-04-19 | 宁波海天金属成型设备有限公司 | Embedded mode regulating intermediate wheel structure of encoder |
| CN113997535B (en) * | 2021-10-29 | 2024-07-09 | 广东力劲塑机智造股份有限公司 | Method for adjusting mold and aligning bonding surface of mold of injection molding machine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4938682A (en) * | 1987-11-20 | 1990-07-03 | Fanuc Ltd | Toggle type mold clamping apparatus in an injection molding machine |
| US5052908A (en) * | 1988-08-29 | 1991-10-01 | Fanuc Ltd. | Toggle type mold clamping apparatus in an electrically-operated injection molding machine |
-
1994
- 1994-12-03 CN CN94119391A patent/CN1050086C/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4938682A (en) * | 1987-11-20 | 1990-07-03 | Fanuc Ltd | Toggle type mold clamping apparatus in an injection molding machine |
| US5052908A (en) * | 1988-08-29 | 1991-10-01 | Fanuc Ltd. | Toggle type mold clamping apparatus in an electrically-operated injection molding machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108688108A (en) * | 2017-03-31 | 2018-10-23 | 住友重机械工业株式会社 | Injection (mo(u)lding) machine and industrial machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1123735A (en) | 1996-06-05 |
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Expiration termination date: 20141203 Granted publication date: 20000308 |