CN103358498A - Injection moulding machine - Google Patents

Injection moulding machine Download PDF

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Publication number
CN103358498A
CN103358498A CN2013100649756A CN201310064975A CN103358498A CN 103358498 A CN103358498 A CN 103358498A CN 2013100649756 A CN2013100649756 A CN 2013100649756A CN 201310064975 A CN201310064975 A CN 201310064975A CN 103358498 A CN103358498 A CN 103358498A
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CN
China
Prior art keywords
injection
screw rod
metering
motor
lding
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Granted
Application number
CN2013100649756A
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Chinese (zh)
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CN103358498B (en
Inventor
德能龙一
雷磊
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Sumitomo Heavy Industries Ltd
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Sumitomo Heavy Industries Ltd
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Publication of CN103358498A publication Critical patent/CN103358498A/en
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Publication of CN103358498B publication Critical patent/CN103358498B/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/76Measuring, controlling or regulating
    • B29C45/7666Measuring, controlling or regulating of power or energy, e.g. integral function of force
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/76Measuring, controlling or regulating
    • B29C45/766Measuring, controlling or regulating the setting or resetting of moulding conditions, e.g. before starting a cycle
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17Component parts, details or accessories; Auxiliary operations
    • B29C45/76Measuring, controlling or regulating
    • B29C2045/7606Controlling or regulating the display unit
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2945/00Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76Measuring, controlling or regulating
    • B29C2945/76003Measured parameter
    • B29C2945/7602Torque
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2945/00Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76Measuring, controlling or regulating
    • B29C2945/76003Measured parameter
    • B29C2945/76083Position
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2945/00Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76Measuring, controlling or regulating
    • B29C2945/76177Location of measurement
    • B29C2945/7618Injection unit
    • B29C2945/76187Injection unit screw
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2945/00Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76Measuring, controlling or regulating
    • B29C2945/76177Location of measurement
    • B29C2945/7618Injection unit
    • B29C2945/76214Injection unit drive means

Abstract

The invention provides an injection moulding machine with excellent moulding stability. The injection moulding machine (10) is provided with the following elements: a screw rod (52) used for measuring fusion resin in a cylinder (41) and injecting the resin to fill in a die (30); a measurement motor (55) for rotating the screw rod (52); a detector (58) used for detecting the rotation torque of the measurement motor (55); a movement driving portion (43) enabling the screw rod (52) to move in an axis direction; and a control portion (80) controlling the measurement motor (55) and the movement driving portion (43). The control portion (80) is used for adjusting filling amount based on the screw rod (52) according to the detection value of the detector (58).

Description

Injection (mo(u)lding) machine
The application advocates the priority based on the Japanese patent application of on March 26th, 2012 application 2012-070439 number.The full content of this application is applied in this specification by reference.
Technical field
The present invention relates to a kind of injection (mo(u)lding) machine.
Background technology
Injection (mo(u)lding) machine possesses resin with melting and penetrates injection device to the die device.Die device is made of cover half and dynamic model, forms the die cavity space during matched moulds between cover half and the dynamic model.Injection device is measurement of molten resin in cylinder body, and the molten resin that measures is filled in die cavity space in the die device.Resin at die cavity space cooling curing takes out (for example referring to Patent Document 1) as products formed after die sinking.
Patent documentation 1: international disclosing No. 2005/068155
Because the particle diameter of resin material is unequal, might there be deviation in the melting speed of resin material.Therefore, moulding is unstable, sometimes the quality variation of products formed.
Summary of the invention
The present invention finishes in view of above-mentioned problem, and its purpose is to provide a kind of injection (mo(u)lding) machine of forming stability excellence.
In order to solve above-mentioned problem, the injection (mo(u)lding) machine based on a form of the present invention possesses: screw rod, and metering and ejaculation molten resin in cylinder body, thus in mould, fill molten resin; Motor is used in metering, makes this screw rod rotation; Detector is for detection of the rotating torques of this metering with motor; Move and use drive division, make described screw rod to moving axially; And control part, control described metering with motor and the described mobile drive division of using, described control part is according to the detected value adjustment of the described detector loading based on described screw rod.
In addition, the injection (mo(u)lding) machine based on another form of the present invention possesses: screw rod, measurement of molten resin in the metering cylinder body; Motor is used in metering, makes this screw rod rotation; Detector is for detection of the rotating torques of this metering with motor; The injection cylinder body is received in the molten resin that measures in the described metering cylinder body; Plunger penetrates the molten resin in this injection cylinder body and is filled in the mould; Move and use drive division, make this plunger to moving axially; And control part, control described metering with motor and the described mobile drive division of using, described control part is according to the detected value adjustment of the described detector loading based on described plunger.
The invention effect:
According to the present invention, provide a kind of injection (mo(u)lding) machine of forming stability excellence.
Description of drawings
Fig. 1 is that expression is based on the figure of the mold closing mechanism of the injection (mo(u)lding) machine of one embodiment of the present invention.
Fig. 2 is that expression is based on the figure of the injection device of the injection (mo(u)lding) machine of one embodiment of the present invention.
Fig. 3 illustrates the figure that the time based on the various parameters of the state of the injection (mo(u)lding) machine of an embodiment changes.
Fig. 4 is that expression is based on the schematic diagram of the time variation of the rotating torques of the metering usefulness motor of an embodiment.
Among the figure: 10-injection (mo(u)lding) machine, 12-fixation clip, but 13-dynamic pressure plate, 30-die device, the 32-cover half, 33-dynamic model, 42-heating cylinder (cylinder body), 43-injection motor (the mobile drive division of using), the 52-screw rod, 55-metering motor, 58-current sensor (detector), 80-control part.
The specific embodiment
Below, describe being used for implementing mode of the present invention with reference to the accompanying drawings, also description thereof is omitted to the additional identical or corresponding symbol of identical or corresponding structure in each accompanying drawing.
(mold closing mechanism)
Fig. 1 is that expression is based on the figure of the mold closing mechanism of the injection (mo(u)lding) machine of one embodiment of the present invention.Fig. 1 represents the state of matched moulds.In the explanation of mold closing mechanism, but the moving direction of the dynamic pressure plate in the time of will carrying out mold closing is made as the place ahead, describes but the moving direction of the dynamic pressure plate in the time of will carrying out die sinking is made as the rear.
Injection (mo(u)lding) machine 10 possesses: framework 11; Fixation clip 12 is fixed in framework 11; And toggle seat 15, and fixation clip 12 between be adapted to respect to framework 11 across predetermined distance and move freely.Set up a plurality of (for example 4) connecting rod 16 between fixation clip 12 and the toggle seat 15.
But injection (mo(u)lding) machine 10 further possesses dynamic pressure plate 13, and itself and fixation clip 12 are opposed and set, and be adapted to can be along connecting rod 16 advance and retreat (left and right directions in figure moves).But in dynamic pressure plate 13, with 12 opposed of fixation clips dynamic model 33 is installed, but in fixation clip 12, with 13 opposed of dynamic pressure plates cover half 32 is installed.Consist of die device 30 by cover half 32 and dynamic model 33.
Injection (mo(u)lding) machine 10 further possesses: toggle mechanism 20, but be equipped between dynamic pressure plate 13 and the toggle seat 15; Matched moulds makes toggle mechanism 20 actions with motor 26; Reach the ball screw framework 27 as transmission mechanism, will convert rectilinear motion to rotatablely moving of motor 26 generations by matched moulds and be transmitted to toggle mechanism 20.But consist of mold closing mechanism by fixation clip 12 dynamic pressure plates 13, toggle seat 15, toggle mechanism 20 and matched moulds with motor 26 etc.
Toggle mechanism 20 has: crosshead 24, and it is free to advance or retreat that Xiang Yumo opens and closes the parallel direction of direction; The 2nd toggle control stick 23 swings and is installed on freely crosshead 24; The 1st toggle control stick 21 swings and is installed on freely toggle seat 15; And toggle arm 22, be installed on freely dynamic pressure plate 13 but swing.Between the 1st toggle control stick 21 and the 2nd toggle control stick 23, reach between the 1st toggle control stick 21 and the toggle arm 22 respectively by chain connection.In addition, toggle mechanism 20 is so-called involute 5 fulcrum double-toggle mechanisms, has laterally zygomorphic structure.
Ball screw framework 27 is made of the ball-screw nut 27a that for example is fixed in crosshead 24 and the ballscrew shaft 27b that is screwed together in ball-screw nut 27a.Ballscrew shaft 27b is rotated freely supporting with respect to toggle seat 15.If matched moulds rotates with the output shaft of motor 26, then ballscrew shaft 27b rotation, ball-screw nut 27a advance and retreat, so crosshead 24 advance and retreat.
Make as the crosshead 24 of driven parts with motor 26 and advance if drive matched moulds to positive direction, thereby make toggle mechanism 20 actions, but then dynamic pressure plate 13 is front and then carry out mold closing.
If further drive matched moulds motor 26 to positive direction, then toggle mechanism 20 produces the mold clamping force that multiply by the toggle multiplying power based on matched moulds with the propulsive force of motor 26.On the connecting rod 16 that extends according to mold clamping force mold clamping force sensor 17 is installed.Mold clamping force sensor 17 detects mold clamping force by detecting the strain (elongation) of connecting rod 16 every the scheduled time.Detected mold clamping force is input into control part 80 successively.Form die cavity space C between the cover half 32 of matched moulds state and the dynamic model 33.Molten resin is filled in die cavity space C, and is solidified into products formed.
Then, with motor 26 crosshead 24 is retreated if drive matched moulds to opposite direction, thereby make toggle mechanism 20 action, but then dynamic pressure plate 13 retreats and carries out die sinking.Then, by making the electronic device action that ejects, products formed is pushed out from dynamic model 33.
In addition, in the mold closing mechanism of present embodiment, produce mold clamping force with toggle mechanism 20, but but also can not use toggle mechanism 20 and will directly be transmitted to dynamic pressure plate 13 as mold clamping force with the propulsive force that motor 26 produces by matched moulds.In addition, but also can directly be transmitted to dynamic pressure plate 13 as mold clamping force with the propulsive force that cylinder produces by matched moulds.In addition, also can carry out mould by line motor and open and close, and carry out matched moulds by electromagnet, the mode of mold closing mechanism is restriction not.
(injection device)
Fig. 2 is that expression is based on the figure of the injection device of the injection (mo(u)lding) machine of one embodiment of the present invention.In the explanation of injection device, different from the explanation of mold closing mechanism, the injection direction of resin is made as the place ahead, and the rightabout of resin injection direction is made as the rear describes.
Injection (mo(u)lding) machine 10 further possesses injection device 40, and described injection device penetrates resin in heating cylinder 42 interior meltings from nozzle 41, and is filled in the die cavity space C in the die device 30.Injection device 40 possesses injection motor (the mobile drive division of using) 43.The rotation of injection motor 43 is passed in ballscrew shaft 44.Rotation by ballscrew shaft 44 comes the ball-screw nut 45 of forward-reverse to be fixed in pressure plare 46.Pressure plare 46 can move along the guide rod 47,48 that is fixed in base (not shown).The forward-reverse motion of pressure plare 46 is passed in screw rod 52 via bearing 49, resin pressure detector (for example force cell) 50 and injection shaft 51.Screw rod 52 is adapted in heating cylinder 42 interior rotations and freely and in the axial direction moves freely.Be provided with resin at the rear portion of heating cylinder 42 and supply with the hopper 53 of usefulness.Metering is transmitted to injection shaft 51 with rotatablely moving of motor 55 via the connecting members such as conveyer belt and belt wheel 54.That is, by metering motor 55 rotary actuation injection shafts 51, thus screw rod 52 rotations.
In measurement process, drive metering and make screw rod 52 rotations with motor 55, the resin particle that is supplied in the rearward end of screw rod 52 is delivered to the place ahead of screw rod 52.In this process, the softening also melting of resin particle.Because molten resin is stored in the place ahead of screw rod 52, so screw rod 52 retreats.In injection process (being also referred to as filling work procedure), drive injection motor 43 screw rod 52 is advanced, press molten resin and penetrate from nozzle 41.Molten resin is pressed into die cavity space C via sprue S shown in Figure 1, runner R, cast gate G etc.The power that screw rod 52 is pressed molten resin detects as counter-force by resin pressure detector 50.That is, detect the resin pressure (injection pressure of resin) that puts on screw rod 52.Detected resin pressure is input into control part 80.In addition, resin thermal contraction by cooling in the C of die cavity space, therefore for the resin of supplemental heat amount of contraction, in the pressurize operation, the resin pressure (injection pressure of resin) that puts on screw rod 52 remains predetermined pressure.
The position detector 57 of the position of detecting screw rod 52 is installed at pressure plare 46.The detection signal of position detector 57 is input into control part 80.The detection signal of position detector 57 also can be used for detecting the translational speed of screw rod 52.
Injection motor 43 and metering can be respectively servo motor with motor 55, possess encoder 43a, 55a for detection of rotating speed.Be input into respectively control part 80 by the detected rotating speed of encoder 43a, 55a.Control part 80 is according to testing result FEEDBACK CONTROL injection motor 43 and the metering motor 55 of encoder 43a, 55a.
Control part 80 is made of microcomputer etc., such as the ROM with CPU, storage control program etc., store read-write RAM, timer, counter, input interface and the output interface etc. of operation result etc.
(time of the various parameters of the state of expression injection (mo(u)lding) machine changes)
Fig. 3 illustrates the figure that the time based on the actual job value of the various parameters of the state of the injection (mo(u)lding) machine of an embodiment changes.In Fig. 3, transverse axis represents the time, and the longitudinal axis represents the pressure (injection pressure of resin) of the position of screw rod, the pace of screw rod (injection speed of resin) and screw rod.In Fig. 3, for convenience of explanation, screw rod dwell time (t3-t1) is depicted as and compares actual (tube) length.
Injection (mo(u)lding) machine 10 carries out after the pressurize operation, pressurize operation of injection pressure of injection process, control resin of injection speed of matched moulds operation, control resin of mold closing operation, the fastening die device 30 of closing molding device 30 releasing at the refrigerating work procedure of die device 30 interior cured resins, the measurement process that metering is used for the resin of next products formed, the die sinking operation of opening die device 30 and the die device 30 after the die sinking release operation of products formeds.Injection (mo(u)lding) machine is made products formed repeatedly by repeatedly carrying out these operations.The time that Fig. 3 is illustrated in the various parameters in injection process, pressurize operation, refrigerating work procedure and the measurement process changes.
Injection process carries out after the matched moulds operation.In injection process, drive injection motor 43 screw rod 52 is advanced.Screw rod 52 is pressed molten resin and is penetrated from nozzle 41.Molten resin flows into die cavity space C via being formed at sprue S, runner R in the die device 30, cast gate G etc.
In injection process, supply with electric current to injection motor 43, so that the pace of screw rod 52 becomes setting value.The setting value of screw speed can be followed changing of screw position front and then interimly.For example, if the detected value of position detector 57 reaches setting value, then the setting value of screw speed changes.
In addition, for the change of the setting value of screw speed, the timer that can use the instrumentation injection process to begin the time after (constantly t0) replaces position detector 57.Because there are corresponding relation in screw position and time, no matter the setting value that therefore which changes screw speed as the basis take all is identical.
The setting value of screw speed can the moment t1 before the pressurize operation begins roughly becomes 0(zero).Screw rod 52 is slowed down hastily, stops at moment t2 screw rod 52.If screw rod 52 stops, then screw position is almost unchanged, so the elapsed time of the setting t1 zero hour that stops of control part 80 usefulness timer instrumentation screw rods replaces the detected value of monitoring position detector 57.
Therefore, " screw rod stops " not only comprising the situation that screw rod 52 stops fully, and further comprises the situation of screw rod 52 dead slow aheads and screw rod 52 dead slow asterns.Screw rod 52 temporarily stopped before dead slow astern during screw rod 52 dead slow astern.
When moment t2 screw rod 52 stopped, the flow front of resin did not arrive at the end of die cavity space C.At screw rod 52 stopping periods, the flow front of resin is advanced with the compression stress that puts on resin during penetrating.Because screw rod 52 stops, so resin slowly slows down owing to flow resistance.
Switching from from injection process to the pressurize operation is called V/P and switches.The moment t3 that V/P switches in that screw rod stops the setting time that t1 rises the zero hour reaches setting value carries out.In addition, after injection process begins and the pressurize operation do not carry out screw rod before beginning when stopping, when the detected value that V/P switches in position detector 57 reaches setting value or the instrumentation value of the timer of the time of instrumentation injection process after beginning carry out when reaching setting value.
If resin is cooled in the C of die cavity space, then resin thermal contraction.For the resin of supplemental heat amount of contraction, in the pressurize operation, the resin pressure (injection pressure of resin) that puts on screw rod 52 is remained predetermined pressure.Supply with electric current to injection motor 43, so that the detected value of resin pressure detector 50 becomes setting value.The setting value of the injection pressure of the resin in the pressurize operation can be followed the process of time and change interimly.In the pressurize operation, because the variation of screw position is less, therefore with the time after the timer instrumentation V/P switching of control part 80.
Time after V/P switches reaches the moment t4 of setting-up time, and the setting value of the injection pressure of resin turns back to roughly 0(zero), finish the pressurize operation.When the pressurize operation finished, the resin that has been solidified as the cast gate G of the entrance of die cavity space C stopped up.This state is called gate solidification, and the injection pressure of resin can not reach die cavity space C, and prevents from the refluence of the resin of die cavity space C.
After the pressurize operation finishes, be cured the refrigerating work procedure of the resin in the C of die cavity space.In refrigerating work procedure, break off under the state of the supply of the resin of die cavity space C resin thermal contraction by cooling in the C of die cavity space.In addition, the cooling of resin is also carried out in injection process or pressurize operation, and resin surface solidified when the pressurize operation finished.
Measurement process carries out after the pressurize operation finishes.In order to shorten molding cycle, measurement process can carry out during refrigerating work procedure.In measurement process, drive metering and make screw rod 52 rotations with motor 55, the resin particle that is supplied in the rearward end of screw rod 52 is delivered to the place ahead of screw rod 52.In this process, resin particle softens and melting.Because molten resin is stored in the place ahead of screw rod 52, so screw rod 52 retreats.If screw rod 52 retreats preset distance, the molten resin of scheduled volume is put aside in the place ahead of screw rod 52, and then screw rod 52 stops the rotation.
In measurement process, supply with electric currents to measuring with motor 55, produce and the corresponding rotating torques of supply electric current, so that the rotating speed of screw rod 52 becomes setting value.For example use current sensor 58 for detection of metering with the detector of the rotating torques of motor 55.Current sensor 58 detects to the supply electric current of metering with motor 55.The detected value of current sensor 58 is supplied in control part 80, and is converted into the rotating torques that motor 55 is used in metering.Metering comprises the rotating torques of screw rod 52 and the Shear torque of resin etc. with the rotating torques of motor 55.
Fig. 4 represents the schematic diagram based on the time variation of the rotating torques of the metering usefulness motor of an embodiment.
Make screw rod 52 startings when measurement process begins, therefore as shown in Figure 4, metering becomes large with the rotating torques of motor 55.If the rotating speed of screw rod 52 becomes setting value, then metering diminishes very fast stabilisation with the rotating torques of motor 55.
Yet because the particle diameter of resin material is unequal, might there be deviation in the melting speed of resin material when penetrating (1 cycle) each time.The resin that begins to melt is more, and the viscosity of molten resin is just higher, and metering is higher with the rotating torques of motor 55.And the resin that begins to melt is more, and the space is just more, and resin density is lower.Therefore, with the rotating torques of motor 55 dependency relation is arranged in the density of the molten resin of heating cylinder 42 interior meterings and metering.
Control part 80 is adjusted the setting value of the control of relevant injection motor 43 with the rotating torques of motor 55 according to detected metering.According to the density at the molten resin of heating cylinder 42 interior meterings, can adjust the loading (injection volume) of molten resin, and can remain the weight that in injection/pressurize operation, is filled in the molten resin in the die device 30 constant.
In the adjustment of condition of molding, can use metering to become setting value with the rotating speed of motor 55, and the rotating torques of the metering usefulness motor 55 during stabilisation.For example, use measurement process to begin after through the mean value of the rotating torques behind the setting-up time (for example measure time T half).The mean value that also can replace with the integrated value of rotating torques in addition, rotating torques.
The setting value that control part 80 is adjusted comprises (1) time (t3-t0) or pressurize operation screw position when beginning till beginning to begin to the pressurize operation from injection process.If the moment t3 that the pressurize operation begins ahead of time, then the screw rod displacement till the moment t3 shortens, and the loading of molten resin diminishes.On the other hand, if the moment t3 that the pressurize operation begins postpones, the screw rod displacement that then arrive till the moment t3 is elongated, and the filling quantitative change of molten resin is large.
When screw rod 52 stopped in injection process, the setting value that control part 80 is adjusted also can be for example (2) time (t1-t0) or the screw position of the setting that stops of screw rod when beginning till beginning to begin to the setting that screw rod stops from injection process.If the setting t1 zero hour that screw rod stops ahead of time, then the screw rod displacement till the moment t1 shortens, and the loading of molten resin diminishes.On the other hand, if the setting t1 zero hour that screw rod stops to postpone, the screw rod displacement that then arrive till the moment t1 is elongated, and the filling quantitative change of molten resin is large.
And the setting value that control part 80 is adjusted comprises the dwell time (t4-t3) till finish of beginning of (3) pressurize operation.If the dwell time shortens, then screw rod displacement shortens, and the loading of molten resin diminishes.On the other hand, if the dwell time is elongated, then screw rod displacement is elongated, and the filling quantitative change of molten resin is large.
In addition, the setting value adjusted of control part 80 comprises that (4) put on the resin pressure of screw rod 52 (injection pressure of resin) in the pressurize operation.Because the pressurize operation is for the operation of replenishing the thermal contraction that the resin cooling causes, if therefore pressurize step-down, then the loading of molten resin diminishes.On the other hand, if pressurize uprises, then the filling quantitative change of molten resin is large.When the setting value of the injection pressure of resin changes along with the process of time interimly, adjust at least 1 setting value and get final product.
The setting value that control part 80 is adjusted comprises that at least 1 of setting value of above-mentioned (1)~(4) gets final product, and it is combined as freedom.
When detected metering used the rotating torques of motor 55 to surpass the higher limit of predefined scope, control part 80 made the setting value of above-mentioned (1)~(4) greater than predefined a reference value.And during less than the lower limit of above-mentioned scope, control part 80 makes the setting value of above-mentioned (1)~(4) less than predefined a reference value with the rotating torques of motor 55 for detected metering.The change amount of each setting value is preseted, and also can be constant basis, also can be the proportional amount of departure that is offset to the above-mentioned scope of the rotating torques of using motor 55 from detected metering.A reference value is for example set by the user.
On the other hand, detected metering is when the rotating torques of motor 55 is in above-mentioned scope, and control part 80 does not change the setting value of above-mentioned (1)~(4), but keeps the state of predefined a reference value.Can by between higher limit and lower limit, giving scope, prevent excessive setting change.
Can carry out when each metering based on the adjustment of the setting value of control part 80, also can carry out according to user's requirement.User's requirement by input part 94(such as keyboards with reference to Fig. 2) input and be sent to control part 80.When user's requirement can change at the batch such as resin particle or the size distribution of the mixing ratio of resin particle and the regrown material resin material such as when changing or average grain diameter carry out when changing.
Metering is recorded in the recording mediums such as RAM with the rotating torques of motor 55, and reads as required.Metering is done the corresponding recording medium that is recorded in the rotating torques of motor 55 with the id information of products formed relatedly.
Injection (mo(u)lding) machine 10 can further possess display part 92(with reference to figure 2), it shows the metering of the adjustment of the condition of molding that the is used for injection/pressurize operation rotating torques of motor 55.The user can confirm the stability in the density of the molten resin of heating cylinder 42 interior meterings.
Display part 92 is such as being made of display etc., and the image that requires according to the user shows that metering is with the rotating torques of motor 55 under based on the control of control part 80.User's requirement is by input part 94 inputs and be sent to control part 80.Display part 92 is done corresponding related export with metering with the rotating torques of motor 55 with the id information of products formed.
Above, one embodiment of the present invention is illustrated, but the invention is not restricted to above-mentioned embodiment, in the scope of the aim of the present invention of in technical scheme, putting down in writing, can carry out various distortion and displacement.
For example the injection device 40 of above-mentioned embodiment is equipped on coaxial screw in the heating cylinder 42 for the screw rod 52 of the ejaculation of the metering of carrying out resin and resin, but also can be screw rod preformed formula.Screw rod preformed formula injection device possess measurement of molten resin in metering cylinder screw rod, be received in the injection cylinder of the molten resin that measures in the metering cylinder and penetrate molten resin in the injection cylinder and be filled in plunger in the mould.
In addition, the setting value adjusted of control device 80 is not limited to the setting value of above-mentioned (1)~(4).When being in addition setting value of above-mentioned (1)~(4), metering is big or small opposite with the change of the large I of the rotating torques of motor 55 and setting value.That is, when metering uses the rotating torques of motor 55 to surpass the higher limit of predefined preset range, also can reduce the setting value of the control of relevant injection motor 43.In addition, metering during less than the lower limit of predefined preset range, also can increase the setting value of the control of relevant injection motor 43 with the rotating torques of motor 55.
In addition, in the above-described embodiment, the setting value of the rotating speed of screw rod 52 and the location independent of screw rod are constant, but can follow retreating of screw rod 52 and change interimly.For example, if the detected value of position detector 57 reaches setting value, then the setting value of the rotating speed of screw rod 52 changes.At this moment, screw rod 52 rotates with setting value after changing, and the metering during its rotating torques stabilisation can be used for the adjustment of condition of molding with the rotating torques of motor 55.
In addition, in the above-described embodiment, use the rotation motor conduct to make screw rod 52 use drive division to axially movable the movement, but also can use line motor or fluid-pressure cylinder, mobile formation with drive division is not particularly limited.

Claims (9)

1. injection (mo(u)lding) machine is characterized in that possessing:
Screw rod, metering and ejaculation molten resin in cylinder body, thus in mould, fill molten resin;
Motor is used in metering, makes this screw rod rotation;
Detector is for detection of the rotating torques of this metering with motor;
Move and use drive division, make described screw rod to moving axially; And
Control part is controlled described metering and is used drive division with motor and described the movement,
Described control part is according to the detected value adjustment of the described detector loading based on described screw rod.
2. injection (mo(u)lding) machine as claimed in claim 1, wherein,
Described control part moves with the relevant setting value of the control of drive division with described according to the detected value adjustment of described detector.
3. injection (mo(u)lding) machine as claimed in claim 2, wherein,
With described mobile screw position when comprising that with the relevant setting value of the control of drive division time till beginning to begin to the pressurize operation from injection process or pressurize operation begin.
4. injection (mo(u)lding) machine as claimed in claim 2 or claim 3, wherein,
Described control part after injection process begins and the pressurize operation begin to stop in the past described screw rod,
With described mobile screw position when comprising that with the relevant setting value of the control of drive division setting that time till beginning to begin to the setting that described screw rod stops from injection process or described screw rod stop begins.
5. such as each described injection (mo(u)lding) machine in the claim 2 to 4, wherein,
Mobile comprise dwell time till the end of beginning from the pressurize operation with the relevant setting value of the control of drive division with described.
6. such as each described injection (mo(u)lding) machine in the claim 2 to 5, wherein,
Be included in the resin pressure that acts on described screw rod in the pressurize operation with described the movement with the relevant setting value of the control of drive division.
7. such as each described injection (mo(u)lding) machine in the claim 2 to 6, wherein,
When the detected value of described detector surpassed the higher limit of preset range, described control part made the setting value relevant with the control of described movement usefulness drive division greater than predefined a reference value,
The detected value of described detector is during less than the lower limit of described preset range, described control part make with described mobile with the relevant setting value of the control of drive division less than predefined a reference value.
8. such as each described injection (mo(u)lding) machine in the claim 1 to 7, wherein,
Described injection (mo(u)lding) machine further possesses display part, and this display part shows the detected value of employed described detector in the described adjustment of described control part.
9. injection (mo(u)lding) machine is characterized in that possessing:
Screw rod, measurement of molten resin in the metering cylinder body;
Motor is used in metering, makes this screw rod rotation;
Detector is for detection of the rotating torques of this metering with motor;
The injection cylinder body is received in the molten resin that measures in the described metering cylinder body;
Plunger penetrates the molten resin in this injection cylinder body and is filled in the mould;
Move and use drive division, make this plunger to moving axially; And
Control part is controlled described metering and is used drive division with motor and described the movement,
Described control part is according to the detected value adjustment of the described detector loading based on described plunger.
CN201310064975.6A 2012-03-26 2013-03-01 Injection (mo(u)lding) machine Expired - Fee Related CN103358498B (en)

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