CN102756465A - Method and device for controlling moving speed of injection mold in injection molding machine - Google Patents
Method and device for controlling moving speed of injection mold in injection molding machine Download PDFInfo
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- CN102756465A CN102756465A CN2012101229733A CN201210122973A CN102756465A CN 102756465 A CN102756465 A CN 102756465A CN 2012101229733 A CN2012101229733 A CN 2012101229733A CN 201210122973 A CN201210122973 A CN 201210122973A CN 102756465 A CN102756465 A CN 102756465A
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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
- B29C45/76—Measuring, controlling or regulating
- B29C45/766—Measuring, controlling or regulating the setting or resetting of moulding conditions, e.g. before starting a cycle
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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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76003—Measured parameter
- B29C2945/7611—Velocity
- B29C2945/76113—Velocity linear movement
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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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76003—Measured parameter
- B29C2945/7613—Weight
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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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76177—Location of measurement
- B29C2945/76224—Closure or clamping unit
- B29C2945/76227—Closure or clamping unit mould platen
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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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76177—Location of measurement
- B29C2945/76224—Closure or clamping unit
- B29C2945/7623—Closure or clamping unit clamping or closing drive means
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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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76344—Phase or stage of measurement
- B29C2945/76387—Mould closing
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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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76595—Velocity
- B29C2945/76598—Velocity linear movement
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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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76655—Location of control
- B29C2945/76702—Closure or clamping device
- B29C2945/76705—Closure or clamping device mould platen
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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
- B29C45/66—Mould opening, closing or clamping devices mechanical
- B29C45/661—Mould opening, closing or clamping devices mechanical using a toggle mechanism for mould clamping
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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 provides a method and device for controlling the moving speed of an injection mold in an injection molding machine. Moving speeds of a crosshead is set according to the positions of the crosshead forming a toggle mechanism of a mold moving mechanism of the injection molding machine. The speed of a movable platen at the respective crosshead position is determined on the basis of the preset speeds and a speed increase of the toggle mechanism. The movable platen is moved in accordance with the preset crosshead speeds in a section containing crosshead positions so that speed of the movable platen does not exceed the predetermined maximum value. The movable platen is moved in accordance with the upper limit speed in a section containing crosshead positions so that the speed of the movable platen exceeds the upper limit speed.
Description
Technical field
The present invention relates to the control method and the device of the mould opening and closing speed of injection (mo(u)lding) machine.
Background technology
But Type of Toggle Clamping Units is advanced through the front and back of crosshead and is advanced in the flexible dynamic pressure plate front and back that make of toggle link.But the translational speed of dynamic pressure plate utilizes elbow type mechanism to amplify, even therefore crosshead is moved with certain speed, but dynamic pressure plate also quicken, and, convert deceleration (for example, with reference to TOHKEMY 2004-155063 communique) in the position of regulation.This from quickening to the dislocation of slowing down, but on dynamic pressure plate, produce the impact of machinery and become the reason of vibration or noise.
But the deceleration of the disclosed technology of TOHKEMY 2004-155063 communique when stopping with position corresponding mode control dynamic pressure plate with crosshead; But suppressed impact by the characteristic generation of above-mentioned dynamic pressure plate; But any countermeasure is not taked in the impact of being quickened, being slowed down and produce by movable platen when crosshead is moved with certain speed.
On the other hand; But but the disclosed technology of TOHKEMY 2010-111021 communique is considered the characteristic of dynamic pressure plate and is determined to make the acceleration of dynamic pressure plate when its stop position quickens effectively; But identical, but do not take any countermeasure by the dynamic pressure plate impact that produces of quickening, slow down when crosshead moved with certain speed with the disclosed technology of TOHKEMY 2004-155063 communique.
In addition, in the disclosed technology of japanese kokai publication sho 63-112136 communique, but disclose the position and the speed of setting dynamic pressure plate, but control the technology that moves of crosshead with the mode that the dynamic pressure plate that moves becomes position and the speed of this setting.But the disclosed technology of the document is controlled with the mode that the speed of dynamic pressure plate is always setting value, thus, but can prevent that dynamic pressure plate is from quickening sharply to switch to deceleration.But, in this technology, but, therefore not producing through setting on the position of impact owing to the mode that always becomes setting value with dynamic pressure plate speed is controlled, crosshead speed is limited, and existence can't be given full play to the problem of mechanical performance originally and so on.
In having the clamping of elbow type mechanism, even in the occasion that crosshead is moved with certain speed, but this crosshead is bent and stretched the elbow type mechanism that lets the dynamic pressure plate front and back advance, and through the speed enlarger of toggle link, but dynamic pressure plate quickens or slows down.And, if carry out sharp from quickening then can to produce impact to the switching of slowing down.Therefore, reduced the translational speed of crosshead without exception in the past, thus, but but the speed of dynamic pressure plate is descended and the acceleration of inhibition dynamic pressure plate, thus suppress to impact.But, speed decline is existed cause mould to open and close the time, and then the time of molding cycle integral body is elongated, the problem of productivity decline and so on.
Summary of the invention
Therefore; The object of the present invention is to provide in the injection (mo(u)lding) machine that utilizes elbow type mechanism that but dynamic pressure plate is opened and closed, but can not control the control method and the device of mould opening and closing speed of injection (mo(u)lding) machine of the crosshead of elbow type mechanism from the mode of quickening to switch to sharp deceleration with the speed of dynamic pressure plate.
With regard to first mode of the control method of the mould opening and closing speed of injection (mo(u)lding) machine of the present invention; This injection (mo(u)lding) machine has through being advanced in the crosshead front and back makes toggle link flexible; But thereby carry out the clamping of the mould on-off action of dynamic pressure plate, the control method of the mould opening and closing speed of this injection (mo(u)lding) machine comprises the steps: to set the step of crosshead speed with the position corresponding mode of above-mentioned crosshead; But obtain the step of speed of the above-mentioned dynamic pressure plate of each crosshead position based on the speed magnifying power of the crosshead speed of above-mentioned setting and above-mentioned toggle link; But but obtain the step of the above-mentioned dynamic pressure plate speed of obtaining above the interval of the crosshead position of predefined dynamic pressure plate speed; In the above-mentioned interval of obtaining, but based on above-mentioned speed magnifying power and above-mentioned predefined dynamic pressure plate speed but but the step that dynamic pressure plate speed becomes the crosshead speed of above-mentioned predefined dynamic pressure plate speed is obtained in each crosshead position; And in the above-mentioned interval of obtaining; But carry out the mould on-off action of above-mentioned dynamic pressure plate according to the crosshead speed of above-mentioned each crosshead position of obtaining, but on the crosshead position beyond the above-mentioned interval, carry out the step of the mould on-off action of above-mentioned dynamic pressure plate according to the crosshead speed of above-mentioned setting.
With regard to second mode of the control method of the mould opening and closing speed of injection (mo(u)lding) machine of the present invention; This injection (mo(u)lding) machine has through being advanced in the crosshead front and back makes toggle link flexible; But thereby carry out the clamping of the mould on-off action of dynamic pressure plate, the control method of the mould opening and closing speed of this injection (mo(u)lding) machine comprises the steps: to set accordingly with the position of above-mentioned crosshead the speed of crosshead; But but obtain the above-mentioned dynamic pressure plate of each crosshead position and the total momentum of metal pattern according to the quality of the speed magnifying power of the crosshead speed of above-mentioned setting, above-mentioned toggle link, above-mentioned dynamic pressure plate and the quality of metal pattern; But but the total momentum of obtaining above-mentioned dynamic pressure plate of obtaining and metal pattern surpasses the interval of the total momentum of predefined dynamic pressure plate and metal pattern; In the above-mentioned interval of obtaining, but but the total momentum of but above-mentioned dynamic pressure plate and metal pattern being obtained in each crosshead position according to the quality of above-mentioned speed magnifying power, above-mentioned predefined total momentum dynamic pressure plate and metal pattern is the crosshead speed of the total momentum of above-mentioned predefined dynamic pressure plate and metal pattern; In the above-mentioned interval of obtaining, but carry out the mould on-off action of above-mentioned dynamic pressure plate, but the mould on-off action of above-mentioned dynamic pressure plate is carried out in the crosshead position beyond in above-mentioned interval according to the crosshead speed of above-mentioned setting according to the crosshead speed of each crosshead position.
With regard to first mode of the control device of the mould opening and closing speed of injection (mo(u)lding) machine of the present invention; This injection (mo(u)lding) machine has through being advanced in the crosshead front and back makes toggle link flexible; But thereby carrying out the clamping of the mould on-off action of dynamic pressure plate, this control device possesses: set the configuration part of crosshead speed accordingly with the position of above-mentioned crosshead; But but obtain the dynamic pressure plate speed operational part of speed of the above-mentioned dynamic pressure plate of each crosshead position according to the speed magnifying power of the crosshead speed of above-mentioned setting and above-mentioned toggle link; But but obtain the interval arithmetic portion of the above-mentioned dynamic pressure plate speed of obtaining above the interval of the crosshead position of predefined dynamic pressure plate speed; In the above-mentioned interval of obtaining, but but but the crosshead speed operational part that dynamic pressure plate speed becomes the crosshead speed of above-mentioned predefined dynamic pressure plate speed is obtained in each crosshead position according to above-mentioned speed magnifying power and above-mentioned predefined dynamic pressure plate speed.And; In the above-mentioned interval of obtaining; But carry out the mould on-off action of above-mentioned dynamic pressure plate according to the crosshead speed of above-mentioned each crosshead position, but the mould on-off action of above-mentioned dynamic pressure plate is carried out in the crosshead position beyond in above-mentioned interval according to the crosshead speed of above-mentioned setting.
With regard to first mode of the control device of the mould opening and closing speed of injection (mo(u)lding) machine of the present invention; This injection (mo(u)lding) machine has through being advanced in the crosshead front and back makes toggle link flexible; But thereby carry out the clamping of the mould on-off action of dynamic pressure plate; The control device of the mould opening and closing speed of this injection (mo(u)lding) machine is characterised in that to possess:
To set the configuration part of crosshead speed with the position corresponding mode of above-mentioned crosshead; But but obtain the dynamic pressure plate speed operational part of speed of the above-mentioned dynamic pressure plate of each crosshead position based on the speed magnifying power of the crosshead speed of above-mentioned setting and above-mentioned toggle link; But but obtain the interval arithmetic portion of the above-mentioned dynamic pressure plate speed of obtaining above the interval of the crosshead position of predefined dynamic pressure plate speed; And in the above-mentioned interval of obtaining; But based on the dynamic pressure plate speed of above-mentioned speed magnifying power and above-mentioned setting but but the crosshead speed operational part that dynamic pressure plate speed becomes the crosshead speed of above-mentioned predefined dynamic pressure plate speed is obtained in each crosshead position; In the above-mentioned interval of obtaining; But carry out the mould on-off action of above-mentioned dynamic pressure plate according to the crosshead speed of above-mentioned each crosshead position, but on the crosshead position beyond the above-mentioned interval, carry out the mould on-off action of above-mentioned dynamic pressure plate according to the crosshead speed of above-mentioned setting.
With regard to second mode of the control device of the mould opening and closing speed of injection (mo(u)lding) machine of the present invention; This injection (mo(u)lding) machine has through being advanced in the crosshead front and back makes toggle link flexible; But thereby carrying out the clamping of the mould on-off action of dynamic pressure plate, this control device possesses: set the configuration part of the speed of crosshead accordingly with the position of above-mentioned crosshead; But but obtain the total momentum operational part of total momentum of above-mentioned dynamic pressure plate and the metal pattern of each crosshead position according to the quality of the speed magnifying power dynamic pressure plate quality of above-mentioned crosshead speed, above-mentioned toggle link and metal pattern; But but obtain the interval arithmetic portion of the total momentum of above-mentioned dynamic pressure plate of obtaining and metal pattern above the interval of the total momentum of predefined dynamic pressure plate and metal pattern; In the above-mentioned interval of obtaining, but but but according to the total momentum that the quality of above-mentioned speed magnifying power, above-mentioned predefined total momentum dynamic pressure plate and metal pattern is obtained above-mentioned dynamic pressure plate and metal pattern to each crosshead position the crosshead speed operational part of crosshead speed of the total momentum of above-mentioned predefined dynamic pressure plate and metal pattern.And; In the above-mentioned interval of obtaining; But carry out the mould on-off action of above-mentioned dynamic pressure plate according to the crosshead speed of each crosshead position, but the mould on-off action of above-mentioned dynamic pressure plate is carried out in the crosshead position beyond in above-mentioned interval according to the crosshead speed of above-mentioned setting.
According to the present invention; Utilize elbow type mechanism to open and close in the injection (mo(u)lding) machine of dynamic pressure plate but can be provided at, but can not control the control method and the device of mould opening and closing speed of injection (mo(u)lding) machine of the crosshead of elbow type mechanism from the mode of quickening to switch to sharp deceleration with the speed of dynamic pressure plate.
Description of drawings
Fig. 1 is a structure chart of using the injection (mo(u)lding) machine of method of the present invention and device.
Fig. 2 A and Fig. 2 B are the figure that the speed of the mold closing operation of explanation user setting is set example.
Fig. 3 A and Fig. 3 B are the figure of crosshead speed of the crosshead position of each regulation of explanation.
But Fig. 4 is the chart of relation of location/velocity magnifying power, the crosshead speed dynamic pressure plate speed of explanation crosshead.
Fig. 5 is the figure of explanation crosshead speed of the present invention.
Fig. 6 is the figure of explanation speed restriction example.
The specific embodiment
Fig. 1 is the structure chart of injection (mo(u)lding) machine of using control method and the device of mould opening and closing speed of the present invention.
Injection (mo(u)lding) machine M possesses Mc of matched moulds portion and injection part Mi on chassis (not shown).Injection part Mi carries out heating and melting to resin material (particle), and the resin behind this heating and melting is injected in the cavity of metal pattern 40.The Mc of matched moulds portion mainly carries out the switching of metal pattern 40 (movable side metal pattern 40a, fixation side metal pattern 40b).
At first, injection part Mi is described.Front end at injection barrel 1 is equipped with nozzle 2, in this injection barrel 1, inserts and is connected with screw rod 3.On this screw rod 3, be provided with and used the resin pressure sensor 5 that utilizes the load cell that is applied to the pressure detecting resin pressure on the screw rod 3 etc.The output signal of resin pressure sensor 5 utilizes A/D converter 16 to convert data signal into and imports servo CPU15.
Then, the Mc of matched moulds portion is described.But but but but the Mc of matched moulds portion possess make travel motor M3, rear portion pressing plate 31 before and after the dynamic pressure plate that dynamic pressure plate 30 front and back as dynamic pressure plate advance, be used to make travel motor M4 before and after the outstanding push rod of push rod that moulding article are released from metal pattern, and connection dynamic pressure plate 30, connecting rod 32, fixation clip 33, crosshead 34, ejecting mechanism 35 and link a plurality of toggle links and the elbow type mechanism 36 that constitutes.Rear portion pressing plate 31 is linked by many connecting rods 32 with fixation clip 33, but dynamic pressure plate 30 is to be configured between rear portion pressing plate 31 and the fixation clip 33 by the mode of connecting rod 32 guiding.But movable side metal pattern 40a is installed on dynamic pressure plate 30, fixation side metal pattern 40b is installed on fixation clip 33.But elbow type mechanism 36 carries out die sinking through making the crosshead 34 that is installed on the ballscrew shaft 38 that is driven by travel motor M3 before and after the dynamic pressure plate retreat (to the left of figure to moving).In addition, if crosshead 34 is advanced in (to figure right-hand to moving), but then before the dynamic pressure plate 30 and then carry out mold closing.And, at movable side metal pattern 40a with after fixation side metal pattern 40b contacts, further through making crosshead 34 advance to the degree that elbow type mechanism 36 fully extends, the generation mold clamping force.
On rear portion pressing plate 31, dispose the adjustment of matched moulds position and use motor M5.On the rotating shaft of matched moulds position adjustment, be equipped with and drive with gear (not shown) with motor M5.Threaded engagement has connecting rod nut (not shown) on the threaded portion 37 of the front end that is formed at each connecting rod 32.Above-mentioned driving utilizes other gears (not shown) to be delivered on the gear of whole connecting rod nuts with the revolving force of gear.That is, use motor M5 if drive the adjustment of matched moulds position, then utilize this transmission mechanism, the connecting rod nut of threaded engagement on the threaded portion 37 of each connecting rod 32 be synchronously rotation respectively.Thus, make the revolution of matched moulds position adjustment, can make the distance of rear portion pressing plate 31 advance and retreat regulations with motor M5 rotation regulation on the direction of regulation.The adjustment of matched moulds position possesses the position detector P5 that position of rotation detects usefulness with motor M5 preferred servo motor as shown in the figure.Import servo CPU15 by the adjustment of the detected matched moulds of position detector P5 position with the detection signal of the position of rotation of motor M5.
The PMC-CPU17 of the microprocessor that the control device 100 of injection (mo(u)lding) machine M has the CNC-CPU20 of the microprocessor of using as Numerical Control, use as mechanical control device able to programme, and the servo CPU15 of the microprocessor used as SERVO CONTROL transmit through select the mutual input and output information of between each microprocessor, carrying out via bus 26.
On servo CPU15, be connected with and stored ROM13 that carries out the control program that circulate in the position, speed circulates, the SERVO CONTROL of the processing of current cycle is special-purpose and the RAM14 that is used for temporarily storing data.In addition, servo CPU15 can be via the pressure signal of A/D (analog/digital) converter 16 detections from the resin pressure sensor 5 that is located at the injection (mo(u)lding) machine main body side.On servo CPU15, be connected with servo amplifier 11,12; Servo motor M2 is used in the rotation of the injection servo motor M1 that these servo amplifiers 11,12 are connected with injection shaft based on the instruction driving from servo CPU15, the screw rod that is connected with the screw rod rotating shaft, from be installed in the last location/velocity detector P1 of each servo motor M1, M2, the output of P2 feeds back to servo CPU15.The position of rotation basis of each servo motor M1, M2 is calculated by servo CPU15 from the feedback signal of the position of location/velocity detector P1, P2, updates stored in each current position memory register.
Carry out in driving metal pattern matched moulds the matched moulds axle servo motor M3, take out the moulding article from metal pattern push rod shaft with being connected with servo amplifier 8,9 on the servo motor M4 respectively.Feed back to servo CPU15 from the location/velocity detector P3 that is installed on each servo motor M3, M4, the output of P4.The position of rotation basis of each servo motor M3, M4 is calculated by servo CPU15 from the feedback signal of the position of location/velocity detector P3, P4, updates stored in each current position memory register.
The ROM18 and being used for that on PMC-CPU17, is connected with the sequential programme etc. of the sequentially-operating of having stored the control injection (mo(u)lding) machine temporarily stores the RAM19 of operational data etc.On CNC-CPU20, be connected with ROM21 and the RAM22 that is used for temporarily storing operational data of the various programs such as control program of automatic running program, the realization of the having stored whole control injection (mo(u)lding) machine mould open and close controlling relevant with the present invention.It is non-volatile memory that forming data is preserved with RAM23, is that memory is used in the forming data preservation of storage condition of molding relevant with the injection molding forming operation and various setting value, parameter, macro-variable etc.Display unit/MDI (manual data input unit) 25 is connected with bus 26 through interface (I/F), carries out the selection of function menu and the input operation of various data etc.In addition, be provided with the numeric data input with numerical key and various function keys etc.In addition, as display unit, can use LCD (liquid crystal indicator), CRT and other display unit.
Through the structure of above-mentioned injection (mo(u)lding) machine M, the whole order of PMC-CPU17 control injection (mo(u)lding) machine.CNC-CPU20 preserves with the condition of molding that RAM23 stored etc. according to the running program of ROM21, forming data, carries out the distribution of move with respect to each servo motor.Servo CPU15 is based on the position of detecting with respect to the move of each distribution with by location/velocity detector P1, P2, P3, P4, P5 and the feedback signal of speed etc.; The combine digital servo processing is carried out drive controlling to servo motor M1, M2, M3, M4, M5.
The moulding action of having used above-mentioned injection (mo(u)lding) machine M is described.If but travel motor M3 is rotated in the forward before and after making dynamic pressure plate, then ballscrew shaft 38 is rotated in the forward, and advances with the crosshead 34 of these ballscrew shaft 38 threaded engagement; Its result; Elbow type mechanism 36 moves, but dynamic pressure plate 30 advances (that is, advancing towards fixation clip 33).
, then transfer to the matched moulds operation if but the movable side metal pattern 40a that is installed on the dynamic pressure plate 30 contacts (mold closing state) with fixation side metal pattern 40b.In the matched moulds operation, but, on metal pattern 40, produce mold clamping force through further making elbow type mechanism 36 elongations to forward drive dynamic pressure plate front and back travel motor M3.And, be located to advance before and after the screw rod on the injection part Mi through driving and make toggle link 3 along its axial advancement with servo motor M1, be formed in the interior void space of metal pattern 40 thereby molten resin is filled into.
In the occasion of carrying out die sinking; But through making the travel motor M3 counter-rotating of dynamic pressure plate front and back, ballscrew shaft 38 counter-rotatings are retreated with the crosshead 34 of these ballscrew shaft 38 threaded engagement; Its result; Elbow type mechanism 36 is done in the enterprising action of bending direction, but dynamic pressure plate 30 is retreated (that is, pressing plate 31 advances towards the rear portion).
If the die sinking operation finishes, then be used to make the moulding article are moved from the outstanding push rod front and back travel motor M4 of push rod that movable side metal pattern 40a releases.Thus, push rod (not shown) is outstanding from the inner surface of movable side metal pattern 40a, and the moulding article in the movable side metal pattern 40a are outstanding from movable side metal pattern 40a.
Then, but the mold closing of the dynamic pressure plate relevant with the present invention 30 and die sinking action are described.
But but dynamic pressure plate 30 drive by travel motor M3 before and after the dynamic pressure plate via elbow type mechanism 36, but but therefore before and after the dynamic pressure plate translational speed, the acceleration of speed, acceleration and the dynamic pressure plate 30 of travel motor M3 do not have proportionate relationship.On the other hand, but on dynamic pressure plate 30, be fixed with the movable side metal pattern 40a of metal pattern 40,, but need position, speed, the acceleration of control dynamic pressure plate 30 for mold closing, matched moulds, the die sinking action of carrying out this metal pattern 40.
But but owing to should dynamic pressure plate 30 drive by travel motor M3 before and after the dynamic pressure plate, but but the control of position that therefore should dynamic pressure plate 30, speed, acceleration undertaken by the control of the position of travel motor M3 before and after the dynamic pressure plate, speed, acceleration.But; Because but but there are not proportionate relationship in position, speed, the acceleration of position, speed, acceleration and the dynamic pressure plate 30 of dynamic pressure plate front and back travel motor M3; But therefore even make travel motor M3 rotation before and after the dynamic pressure plate with certain rotary speed, but but the speed of dynamic pressure plate 30, acceleration also according to the change in location of travel motor M3 before and after the dynamic pressure plate.On the other hand; Because but there are the proportionate relationship of stipulating in the position of position, speed, acceleration and the crosshead 34 of travel motor M3, speed, acceleration before and after the dynamic pressure plate; Therefore need only position, speed, the acceleration of decision crosshead 34, but just can determine position, speed, the acceleration of dynamic pressure plate front and back travel motor M3.In addition, be known with mode corresponding to the speed of the Acceleration Control motor of speed.
Therefore; At first; The input mechanism that use is located at the display unit/MDI (manual data input unit) 25 on the injection (mo(u)lding) machine M shown in Figure 1 for example set the position of the crosshead 34 of the mould on-off action shown in Fig. 2 B (below; Be called " crosshead position ") and with the speed of this position corresponding cross 34 (below, be called " crosshead speed ").Crosshead position of setting and crosshead speed are presented at the mode of the chart shown in Fig. 2 A in the display frame of display unit of display unit/MDI (manual data input unit) 25.
And; But the control device 100 of injection (mo(u)lding) machine M based on the crosshead speed of above-mentioned setting, carry out the mould on-off action elbow type mechanism 36 the speed magnifying power and obtain the speed (below, be called " but dynamic pressure plate speed ") of the dynamic pressure plate corresponding with the crosshead position through calculating.But in the dynamic pressure plate speed of being obtained by this calculating is the occasion more than the predefined upper limit speed; But the mode that becomes dynamic pressure plate speed with this upper limit speed is obtained the crosshead speed corresponding to the crosshead position based on above-mentioned speed magnifying power through calculating, with the crosshead speed of obtaining crosshead is moved.
Specifically; But the dynamic pressure plate speed corresponding with crosshead position Pc is made as Vm (Pc); To be made as Vc (Pc) with a crosshead position Pc corresponding cross speed, and the speed magnifying power of elbow type mechanism is made as G (Pc), but then dynamic pressure plate speed Vm (Pc) can express with following (1) formula.
Vm(Pc)＝Vc(Pc)×G(Pc) (1)
Wherein, speed magnifying power G (Pc) is that the function this point of crosshead position Pc is known (for example, with reference to TOHKEMY 2009-251804 communique).
As stated; If utilize the display frame of display unit/MDI (manual data input unit) 25 of injection (mo(u)lding) machine M set crosshead position Pc and with a crosshead position Pc corresponding cross speed Vc (Pc) (with reference to Fig. 2 A); Then control device 100 is set a crosshead position Pc corresponding cross speed Vc (Pc) (with reference to Fig. 3 A, Fig. 3 B) who reads with each regulation from its speed, and the relation of crosshead position (Pc) and crosshead speed (Vc (Pc)) is stored in the memory (for example RAM22).Then, use following formula (1) according to the crosshead position (Pc) of on memory, being stored but and obtain dynamic pressure plate speed Vm (Pc).
Wherein, In the calculating of (1) formula; But (that is, Vm (Pc) >=VL) is through resolving (1) formula with Vm (Pc)=VL for the occasion more than the predefined upper limit speed VL at the dynamic pressure plate speed Vm (Pc) that is positioned at crosshead position Pc; Obtain the crosshead speed Vc (Pc) of the Pc in this crosshead position, and with it as the crosshead speed setting value.That is, through
The calculating of Vc (Pc)=VL/G (Pc) (1 ') is obtained and a crosshead position Pc corresponding cross speed Vc (Pc).Wherein, upper limit speed VL is as long as experimentize to each mechanical kind, size, and the mensuration result through vibration, sound preestablishes and gets final product.On the other hand, in the calculating of (1) formula, but the dynamic pressure plate speed Vm (Pc) that is positioned at crosshead position Pc surpass predefined upper limit speed VL occasion (that is, and Vm (Pc)＜VL), with this crosshead speed Vc (Pc) as the crosshead speed setting value.
In the above-described embodiment; In advance to the crosshead position (Pc) of being stored on each memory but obtain dynamic pressure plate speed Vm (Pc); The Vm (Pc) of the crosshead position (Pc) that becomes Vm (Pc)＞PL among the Vm that obtains (Pc) is made as PL; But because but the relation of crosshead position Pc and dynamic pressure plate speed Vm (Pc) is Fig. 4; But therefore also can obtain upper limit speed VL and 2 crossing crosshead position (with reference to Fig. 5) of dynamic pressure plate speed Vm (Pc) at first, only obtaining betwixt becomes the crosshead speed of Vm (Pc)=PL Vc (Pc).That is, at first, obtain expression crosshead speed Vc (Pc) but and the intersection point of the straight line of the curve of (1) formula of the relation of dynamic pressure plate speed Vm (Pc) and Vm (Pc)=VL (2 points).Afterwards, but to the dynamic pressure plate speed Vm (Pc) of the crosshead position Pc that obtains each regulation between these 2 and obtain crosshead speed Vc (Pc) (using above-mentioned (1 ') formula) same as described abovely into Vm (Pc)=VL.In addition, but but interval B is the speed of dynamic pressure plate 30 surpasses the interval of the crosshead position of predefined dynamic pressure plate speed (but upper limit speed VL of dynamic pressure plate 30), but but interval A, interval C are that dynamic pressure plate speed is the interval below the predefined dynamic pressure plate speed.
In addition; But but but the inertia force of dynamic pressure plate 30 by the total decision of the quality of dynamic pressure plate 30 with the quality that is installed in the metal pattern (movable side metal pattern 40a) on the dynamic pressure plate 30, but the side that quality is big, inertia force is big quickens at dynamic pressure plate 30, the impact during deceleration also becomes big.The quality of metal pattern is according to each metal pattern and difference, so upper limit speed VL need consider the metal pattern quality and revises.Therefore, as the metal pattern of benchmark (below be called " norm metal mould ") decision vibration, the suitable upper limit speed VL of sound, use following (2) formula that upper limit speed VL is revised with in advance according to the mass ratio of this norm metal mould and the actual metal pattern that uses.
VLa＝VLb×(Mb+Mm)/(Ma+Mm) (2)
Ma: the quality of the actual metal pattern that uses
Mb: the quality of norm metal mould
Mm: but the quality of dynamic pressure plate
VLa: the upper limit speed of actual metal pattern
VLb: the upper limit speed of norm metal mould
In addition; The value that the quality of the quality of norm metal mould, the actual metal pattern that uses can use the user on the picture of injection (mo(u)lding) machine, to set; Also can carry out the mould on-off action practically; But the acceleration when utilizing acceleration transducer to measure the dynamic pressure plate acceleration simultaneously, measures the motor torque of driving movable pressing plate, and obtained by following (3) formula.
Ma+Mm (or Mb+Mm)=Fm/A (3)
A: but the acceleration of the dynamic pressure plate of practical measurement
Fm: but but by the thrust of the dynamic pressure plate of the torque calculation of the motor that opens and closes dynamic pressure plate
In said method; But any all is from the picture input of the display unit of injection (mo(u)lding) machine or through calculating the method for the predefined upper limit speed VL that sets dynamic pressure plate; But but also can replace capping speed VL and set the higher limit of the momentum of dynamic pressure plate (comprising metal pattern), but control crosshead speed Vc (Pc) for its mode below higher limit with the momentum of dynamic pressure plate.In this occasion, at first with following (4) but formula is obtained the momentum of the dynamic pressure plate 34 corresponding with crosshead position Pc.
Pm(Pc)＝(Ma+Mm)×Vm(Pc) (4)
Pm: but the momentum of the dynamic pressure plate corresponding (comprising metal pattern) with the crosshead position
Wherein, but as the location independent of (Ma+Mm) of (4) formula of the quality of dynamic pressure plate+metal pattern and crosshead but certain, but therefore dynamic pressure plate speed Vm (Pc) but and the momentum Pm (Pc) of dynamic pressure plate be of equal value.
Then, but at the momentum Pm of dynamic pressure plate (Pc) be more than the higher limit PL of predefined momentum occasion (that is, Pm (Pc) >=PL) through resolving above-mentioned (4) formula with Pm (Pc)=PL, but obtains the dynamic pressure plate speed Vm (Pc) corresponding with crosshead position Pc, that is, from formula
Vm (Pc)=(Ma+Mm)/PL (4 ') obtains Vm (Pc), but and this dynamic pressure plate speed Vm (Pc) substitution (1) formula of trying to achieve obtained Vc (Pc), with it as crosshead speed setting value Vc (Pc).Wherein, optimal value on one side Yi Bian the higher limit PL of momentum can judge with vibration, the sound of machinery with the mode user that can on the picture of injection (mo(u)lding) machine, set, also can for mechanical type, the corresponding eigenvalue of size.On the other hand, in the occasion of Pm (Pc)＜PL, crosshead speed setting value Vc (Pc) is set at the crosshead speed setting value Vc (Pc) that is stored on the above-mentioned memory.
Wherein, Because but the momentum Pm (Pc) of dynamic pressure plate and the relation of crosshead position Pc also are the chart identical with Fig. 4; But therefore can obtain in advance as the momentum Pm (Pc) of dynamic pressure plate but, crosshead position Pc and as dynamic pressure plate speed Vm (Pc) but and behind the intersection point of (4) formula of the relational expression of the momentum Pm (Pc) of dynamic pressure plate and Pm (Pc)=PL (2 points); Between these 2, obtain the momentum Pm (Pc) of the crosshead position of each regulation, obtain crosshead speed Vc (Pc) same as described abovely into Pm (Pc)=PL.
As above such, but crosshead speed controlled through the upper limit speed that dynamic pressure plate is set, the higher limit of momentum, but prevent that dynamic pressure plate is from quickening to convert into sharp deceleration.In the present invention, only crosshead speed is descended,, and can suppress to impact therefore with the elongated Min. that is suppressed to circulation timei in the interval that produces impact.
Claims (4)
1. the control method of the mould opening and closing speed of an injection (mo(u)lding) machine; This injection (mo(u)lding) machine has through being advanced in the crosshead front and back makes toggle link flexible; But thereby carry out the clamping of the mould on-off action of dynamic pressure plate; The control method of the mould opening and closing speed of this injection (mo(u)lding) machine is characterised in that, comprises the steps:
To set crosshead speed with the position corresponding mode of above-mentioned crosshead;
But obtain the speed of the above-mentioned dynamic pressure plate of each crosshead position based on the speed magnifying power of the crosshead speed of above-mentioned setting and above-mentioned toggle link;
But but obtain the interval that the above-mentioned dynamic pressure plate speed of obtaining surpasses the crosshead position of predefined dynamic pressure plate speed;
In the above-mentioned interval of obtaining, but based on above-mentioned speed magnifying power and above-mentioned predefined dynamic pressure plate speed but but the crosshead speed that dynamic pressure plate speed becomes above-mentioned predefined dynamic pressure plate speed is obtained in each crosshead position; And
In the above-mentioned interval of obtaining; But carry out the mould on-off action of above-mentioned dynamic pressure plate according to the crosshead speed of above-mentioned each crosshead position of obtaining, but on the crosshead position beyond the above-mentioned interval, carry out the mould on-off action of above-mentioned dynamic pressure plate according to the crosshead speed of above-mentioned setting.
2. the control method of the mould opening and closing speed of an injection (mo(u)lding) machine; This injection (mo(u)lding) machine has through being advanced in the crosshead front and back makes toggle link flexible; But thereby carry out the clamping of the mould on-off action of dynamic pressure plate; The control method of the mould opening and closing speed of this injection (mo(u)lding) machine is characterised in that, comprises the steps:
To set the speed of crosshead with the position corresponding mode of above-mentioned crosshead;
But but obtain the above-mentioned dynamic pressure plate of each crosshead position and the total momentum of metal pattern based on the quality of the speed magnifying power of the crosshead speed of above-mentioned setting, above-mentioned toggle link, above-mentioned dynamic pressure plate and the quality of metal pattern;
But but the total momentum of obtaining above-mentioned dynamic pressure plate of obtaining and metal pattern surpasses the interval of the total momentum of predefined dynamic pressure plate and metal pattern;
In the above-mentioned interval of obtaining, but but but the crosshead speed of the total momentum of above-mentioned predefined dynamic pressure plate and metal pattern become based on the total momentum that the quality of above-mentioned speed magnifying power, above-mentioned predefined total momentum dynamic pressure plate and metal pattern is obtained above-mentioned dynamic pressure plate and metal pattern to each crosshead position; And
In the above-mentioned interval of obtaining; But carry out the mould on-off action of above-mentioned dynamic pressure plate according to the crosshead speed of each crosshead position, but on the crosshead position beyond the above-mentioned interval, carry out the mould on-off action of above-mentioned dynamic pressure plate according to the crosshead speed of above-mentioned setting.
3. the control device of the mould opening and closing speed of an injection (mo(u)lding) machine; This injection (mo(u)lding) machine has through being advanced in the crosshead front and back makes toggle link flexible; But thereby carrying out the clamping of the mould on-off action of dynamic pressure plate, the control device of the mould opening and closing speed of this injection (mo(u)lding) machine is characterised in that to possess:
To set the configuration part of crosshead speed with the position corresponding mode of above-mentioned crosshead;
But but obtain the dynamic pressure plate speed operational part of speed of the above-mentioned dynamic pressure plate of each crosshead position based on the speed magnifying power of the crosshead speed of above-mentioned setting and above-mentioned toggle link;
But but obtain the interval arithmetic portion of the above-mentioned dynamic pressure plate speed of obtaining above the interval of the crosshead position of predefined dynamic pressure plate speed; And
In the above-mentioned interval of obtaining, but based on the dynamic pressure plate speed of above-mentioned speed magnifying power and above-mentioned setting but but the crosshead speed operational part that dynamic pressure plate speed becomes the crosshead speed of above-mentioned predefined dynamic pressure plate speed is obtained in each crosshead position,
In the above-mentioned interval of obtaining; But carry out the mould on-off action of above-mentioned dynamic pressure plate according to the crosshead speed of above-mentioned each crosshead position, but on the crosshead position beyond the above-mentioned interval, carry out the mould on-off action of above-mentioned dynamic pressure plate according to the crosshead speed of above-mentioned setting.
4. the control device of the mould opening and closing speed of an injection (mo(u)lding) machine; This injection (mo(u)lding) machine has through being advanced in the crosshead front and back makes toggle link flexible; But thereby carrying out the clamping of the mould on-off action of dynamic pressure plate, the control device of the mould opening and closing speed of this injection (mo(u)lding) machine is characterised in that to possess:
To set the configuration part of the speed of crosshead with the position corresponding mode of above-mentioned crosshead;
But but the total momentum operational part of the total momentum of the above-mentioned dynamic pressure plate of obtaining each crosshead position based on the speed magnifying power dynamic pressure plate quality and the metal pattern quality of above-mentioned crosshead speed, above-mentioned toggle link and metal pattern;
But but obtain the interval arithmetic portion of the total momentum of above-mentioned dynamic pressure plate of obtaining and metal pattern above the interval of the total momentum of predefined dynamic pressure plate and metal pattern; And
In the above-mentioned interval of obtaining; But but but become the crosshead speed operational part of crosshead speed of the total momentum of above-mentioned predefined dynamic pressure plate and metal pattern based on the total momentum that the quality of above-mentioned speed magnifying power, above-mentioned predefined total momentum dynamic pressure plate and metal pattern is obtained above-mentioned dynamic pressure plate and metal pattern to each crosshead position
In the above-mentioned interval of obtaining; But carry out the mould on-off action of above-mentioned dynamic pressure plate according to the crosshead speed of each crosshead position, but on the crosshead position beyond the above-mentioned interval, carry out the mould on-off action of above-mentioned dynamic pressure plate according to the crosshead speed of above-mentioned setting.
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| JP2011098473A JP5123413B2 (en) | 2011-04-26 | 2011-04-26 | Method and apparatus for controlling mold opening / closing speed of injection molding machine |
| JP2011-098473 | 2011-04-26 |
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| CN105965807A (en) * | 2015-03-11 | 2016-09-28 | 住友重机械工业株式会社 | Injection molding machine and method for controlling injection molding machine |
| CN107000290A (en) * | 2014-11-20 | 2017-08-01 | 东芝机械株式会社 | Opening and closing device, building mortion and manufacturing process |
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| JP6035151B2 (en) * | 2013-01-04 | 2016-11-30 | 東芝機械株式会社 | Method of calculating moment of inertia and mold clamping device |
| CN103895147A (en) * | 2014-04-09 | 2014-07-02 | 郁震宇 | Die regulation mechanism |
| JP5925926B1 (en) | 2015-02-19 | 2016-05-25 | 東芝機械株式会社 | Mold clamping apparatus, molding apparatus and molding method |
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Also Published As
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| JP5123413B2 (en) | 2013-01-23 |
| JP2012228822A (en) | 2012-11-22 |
| DE102012007833A1 (en) | 2012-10-31 |
| CN102756465B (en) | 2014-07-16 |
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