CN101664988B - Injection controlling device and injection controlling method - Google Patents
Injection controlling device and injection controlling method Download PDFInfo
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- CN101664988B CN101664988B CN 200910170647 CN200910170647A CN101664988B CN 101664988 B CN101664988 B CN 101664988B CN 200910170647 CN200910170647 CN 200910170647 CN 200910170647 A CN200910170647 A CN 200910170647A CN 101664988 B CN101664988 B CN 101664988B
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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
- B29C45/77—Measuring, controlling or regulating of velocity or pressure of moulding material
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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
- B29C2045/1784—Component parts, details or accessories not otherwise provided for; Auxiliary operations not otherwise provided for
- B29C2045/1792—Machine parts driven by an electric motor, e.g. electric servomotor
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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
- B29C2945/76083—Position
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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
- B29C2945/7618—Injection unit
- B29C2945/76187—Injection unit screw
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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
- B29C2945/76381—Injection
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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
- B29C2945/76397—Switch-over
- B29C2945/76404—Switch-over injection-holding
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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
- B29C2945/76498—Pressure
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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
- B29C2945/76568—Position
- B29C2945/76575—Position end position
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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
- B29C2945/76658—Injection unit
- B29C2945/76665—Injection unit screw
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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
- B29C2945/76732—Mould
- B29C2945/76735—Mould cavity
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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
- B29C2945/76822—Phase or stage of control
- B29C2945/76876—Switch-over
- B29C2945/76882—Switch-over injection-holding
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention provides an injection controlling device capable of maintaining the mold internal pressure as an appropriate value when the filling of the molding material is finished, and improving the quality of the molding product. The device comprises an injection member equipped in the cylinder member; a driving portion for injection for pushing the injection member forward; and a control portion (71) for controlling the driving portion in order to drive the injection member from an injection starting position to a speed control termination position. The control portion (71) performs control so that the volume of the forming material pushed into the injection member is a pushing amount of Ws during the period that the injection member is push from the injection starting position forward to the speed control termination position, Ws is larger than Wm1 when setting the volume of the forming material introduced into the die cavity space from the inlet of the mold device when the injection member reaches the speed control termination position. Before the complete filling of the forming material is performed, the injection member is stopped at the speed control termination position, so that the mold internal pressure is maintained as an appropriate value.
Description
Technical field
The present invention relates to injection control apparatus and injection control method.
Background technology
In the past; In forming machine, for example injection machine, the resin as in the heating cylinder, being heated and making the moulding material of its fusing is filled in the die cavity space of die device with high-pressure injection; And in this die cavity space, cool off, solidify, can access formed products thus.
For this reason, above-mentioned injection machine has mold closing mechanism, injection device and above-mentioned die device, but above-mentioned mold closing mechanism possesses fixed form and moving platen, but makes the moving platen advance and retreat through matched moulds with cylinder, carries out mold closing, matched moulds and the die sinking of die device thus.
On the other hand, above-mentioned injection device possesses above-mentioned heating cylinder, is configured in the injection nozzle of this heating cylinder front end, in above-mentioned heating cylinder, is configured to rotate freely and the screw rod of freely advancing and retreat etc.When measurement process, when the metering that links at above-mentioned spiro rod rear end through driving made the screw rod rotation with motor, the resin of supplying with from hopper forwards advanced, is heated and melt in the heating cylinder, and is accumulated in screw head the place ahead.At this moment, screw rod is retreated.Then, when injection process, when the injection motor that links at above-mentioned spiro rod rear end through driving advanced screw rod, the resin that is accumulated in screw head the place ahead was injected from injection nozzle, and is filled in the die cavity space.
For this reason; A kind of injection device is provided, when injection process, has been used for making before the screw rod and then the speed of injecting resin is the speed controlling that injection speed is controlled; Detecting the pressure that is filled into the resin in the die cavity space therebetween is to press in the mould; When pressing to setting in this mould, beginning pressurize operation switches to the pressure control (for example with reference to patent documentation 1) of pressing in the control mould from speed controlling.
Yet in above-mentioned injection device, when beginning pressurize operation, screw rod is retreated sometimes.
Fig. 2 is the figure of the action of the existing injection machine of expression.
Among the figure, Vs ' is an injection speed.When in timing t 11 start injection operations, screw rod advances with injection speed Vs ', and in timing t 12 beginning pressurize operations.At this moment, when the power of the force rate screw rod pushing resin of resin pushing screw rod was big, screw rod was retreated, and injection speed Vs ' becomes negative value.As a result, press step-down in the mould, formed products produces and shrinks, and molded item quality descends.
Therefore, the packing pressure when the pressurize operation is begun is set enough highly, prevents that screw rod from retreating.
Patent documentation 1: TOHKEMY 2008-126533 communique
But, in above-mentioned existing injection device, when improving packing pressure, be difficult to be maintained appropriate value with pressing in the mould, when pressure in the mould became higher than appropriate value, formed products produced flash, burr etc., and molded item quality descends.Especially under formed products was thin or less situation, it is remarkable that the decline of molded item quality becomes.
Summary of the invention
The objective of the invention is to, solve the problem of above-mentioned existing injection device, a kind of injection control apparatus and injection control method are provided, press in the mould in the time of can be with the end-of-fill of moulding material to be maintained appropriate value, can improve molded item quality.
, in injection control apparatus of the present invention, have: injection member is configured to the free and advance and retreat freedom of rotation in the cylinder parts for this reason; The injection drive division is used to make this injection member to advance; And control part, control this drive division, make above-mentioned injection member advance to the speed controlling end position from the injection starting position with carrying out speed controlling.
And; This control part is controlled; So that be located at make injection member from above-mentioned injection starting position advance to till the above-mentioned speed controlling end position during, the volume that pushes moulding material through injection member is the amount of pushing Ws; And the volume that gets into the moulding material in die cavity space from the die device inlet when establishing injection member and arriving above-mentioned speed controlling end position is when being Wm1, Ws＞Wm1.
According to the present invention, in injection control apparatus, have: injection member is configured to the free and advance and retreat freedom of rotation in the cylinder parts; The injection drive division is used to make this injection member to advance; And control part, control this drive division, make above-mentioned injection member advance to the speed controlling end position from the injection starting position with carrying out speed controlling.
And; This control part is controlled; So that be located at make injection member from above-mentioned injection starting position advance to above-mentioned speed controlling end position during, the volume that pushes moulding material through injection member is the amount of pushing Ws; And the volume that gets into the moulding material in die cavity space from the die device inlet when establishing injection member and arriving above-mentioned speed controlling end position is when being Wm1, Ws＞Wm1.
At this moment, before forming the complete filling of material, injection member stops at the speed controlling end position, therefore can be maintained appropriate value with pressing in the mould, and can prevent that formed products from producing contraction, flash, burr etc.Therefore, can improve molded item quality.
Description of drawings
Fig. 1 is the control block diagram of the control part of expression the present invention the 1st embodiment.
Fig. 2 is the figure of the action of the existing injection machine of expression.
Fig. 3 is the concept map of the injection device of the present invention's the 1st embodiment.
Fig. 4 is the concept map of state of the potting resin of expression the present invention the 1st embodiment.
Fig. 5 is the figure of action of the injection machine of expression the present invention the 1st embodiment.
Fig. 6 is the control block diagram of the control part of expression the present invention the 2nd embodiment.
Symbol description:
11 heating cylinders
12 screw rods
53 injection motors
71 control parts
80 die devices
C die cavity space
Qa injects the starting position
Qe speed controlling end position
The Rn resin
The specific embodiment
Below, the embodiment that present invention will be described in detail with reference to the accompanying.
Fig. 3 is the concept map of the injection device of the present invention's the 1st embodiment.
Among the figure, the 10th, injection device, the 11st, as the heating cylinder of cylinder parts; The 12nd, as in this heating cylinder 11, being configured to rotate freedom and advancing and retreat the screw rod of injection member freely; The 13rd, be configured in the injection nozzle of above-mentioned heating cylinder 11 front ends, the 14th, the jet hole that forms on this injection nozzle 13, the 16th, hopper; This hopper is installed near the resin supply port that forms above-mentioned heating cylinder 11 rear ends, accommodates as the resin of moulding material and supplies in the heating cylinder 11.Above-mentioned screw rod 12 front ends possess screw head 27.
Periphery at above-mentioned heating cylinder 11 is equipped with the not shown heater that is used for the heating resin via heating cylinder 11; Assigned position (in this embodiment, being front end, central authorities and rear end) at above-mentioned heating cylinder 11 is equipped with the not shown temperature sensor as the resin temperature test section, and this resin temperature test section is used for detecting through the temperature that detects heating cylinder 11 temperature of resin.
Yet the rear end of above-mentioned heating cylinder 11 is installed in as the 1st fixedly on the place ahead injection support 31 of holding components, separates predetermined distance with this place ahead injection support 31 and is equipped with as the 2nd fixing rear injection support 32 of holding components.And, between above-mentioned the place ahead injection support 31 and rear injection support 32, set up guide post 33, advancing and retreat along this guide post 33 freely is equipped with the pressing plate 34 as movable holding components.In addition, above-mentioned the place ahead injection support 31 and rear injection support 32 are through not shown being bolted on the not shown sliding bottom.
And, in the binding of the rear end of above-mentioned screw rod 12 driving shaft 35 as power transmission shaft being arranged, this driving shaft 35 is supported to rotating freedom with respect to pressing plate 34 through bearing 36,37.And; The conduct metering that is made up of electronic servo motor is installed on the pressing plate 34 with motor 41 with the metering of drive division; Between above-mentioned metering is with motor 41 and driving shaft 35, be equipped with by belt wheel 42,43 and as the rotation transmission body synchronously with 44 the 1st rotation driving sections that constitute.Through driving above-mentioned metering, screw rod 12 is rotated forward or backwards with motor 41.In addition, in this embodiment, use metering to use drive division as above-mentioned metering, but also can use hydraulic motor to replace metering with motor 41 with motor 41.
And; Be equipped with the ball-screw 47 that constitutes by ballscrew shaft that screws togather each other 45 and ball nut 46 at the rear of above-mentioned pressing plate 34; Constituted the straight-line direction of motion transformation component that the rotation motion of ballscrew shaft 45 is changed to ball nut 46 through this ball-screw 47; Constitute the 1st conversion key element by ballscrew shaft 45, constitute the 2nd conversion key element by ball nut 46.
And above-mentioned ballscrew shaft 45 supports to free with respect to above-mentioned rear injection support 32 rotations through bearing 48, and above-mentioned ball nut 46 is fixed on the pressing plate 34 via plate 51 and as the force cell 52 of pressure detecting portion.The resin pressure that can detect in the heating cylinder 11 through above-mentioned force cell 52 is that resin is pressed and the power of screw rod 12 pushing resins is injection force.
And; The injection motor 53 as the injection drive division that is made up of electronic servo motor is installed on the rear injection support 32; Between above-mentioned injection motor 53 and ballscrew shaft 45, be equipped with by belt wheel 54,55 and as the rotation transmission body synchronously with 56 the 2nd rotation driving sections that constitute.Through driving above-mentioned injection motor 53 and making ballscrew shaft 45 rotations, can make ball nut 46 and pressing plate 34 advance and retreat thus, and make screw rod 12 advance and retreat (moving along left and right directions in the drawings) thereupon.In addition, in this embodiment, use injection motor 53 as the injection drive division, but also can use fluid pressure type injection cylinder to replace this injection motor 53.
In the injection device 10 of above-mentioned formation, control part 71 measures the control with motor 41, injection motor 53 etc. according to the content of being set by configuration part 72.And; Be equipped with encoder 61 in order to detect metering with the position of magnetic pole θ m of motor 41 as the 1st magnetic pole position detection part; Be equipped with encoder 62 for the position of magnetic pole θ i that detects injection motor 53, and each position of magnetic pole θ m, θ i are delivered to control part 71 as the 2nd magnetic pole position detection part.In addition, constitute injection control apparatus through above-mentioned heating cylinder 11, screw rod 12, injection motor 53, control part 71 etc.
And; When measurement process,, drive metering and make screw rod 12 when being rotated in the forward with motor 41 when the not shown metering processing unit (metering handling part) of control part 71 measures processing; Granular resin in the hopper 16 gets in the heating cylinder 11; In not shown groove, advance (moving to left in the drawings), and make its fusing, and be accumulated in the place ahead (being left in the drawings) of screw head 27 through above-mentioned heater.Thereupon, make above-mentioned screw rod 12 retreat (moving to right-hand in the drawings).
Then, when injection process, when above-mentioned screw rod 12 was advanced, the resin that is accumulated in screw head 27 the place aheads was filled in the not shown die cavity space of die device 80 from injection nozzle 13 injections.
Yet, when injection process, when the speed controlling that is used to control injection speed; Detect therebetween in the mould in the die cavity space and press, and when beginning the pressurize operation when in this mould, pressing to setting, along with the beginning of pressurize operation; Sometimes screw rod 12 is retreated, and when screw rod 12 was retreated, the mould internal drop was low; Formed products produces and shrinks, and molded item quality descends.
To this, can consider to prevent thus that through when the pressurize operation begins, setting packing pressure higher the mould internal drop is low; But be difficult to be maintained appropriate value with pressing in the mould; When mould inner pressure ratio appropriate value was high, formed products produced flash, burr etc., and molded item quality descends.
Therefore, in this embodiment, the regulation before the pressurize operation begins regularly; Deceleration mode with regulation reduces injection speed; Make screw rod 12 stop at the speed controlling end position of regulation, along with the beginning screw rod 12 of pressurize operation can not retreated, press to appropriate value in the mould thus.
Fig. 4 is the concept map of state of the potting resin of expression the present invention the 1st embodiment.
Among the figure, the 10th, injection device, the 11st, the heating cylinder, the 12nd, screw rod, the 13rd, injection nozzle, the 80th, die device, the 81st, resin stream portions such as sprue, runner, cast gate, C is the die cavity space.
Shown in Fig. 4 (a); Screw rod 12 retreated extreme position as injection during the Qa of starting position; When Qa began advancing of screw rod 12 in this injection starting position, resin Rn was heated cylinder 11 pushings, from injection nozzle 13 injections; Get in the die device 80, be filled among the C of die cavity space through resin stream portion 81.At this moment; The sectional area of the sectional area ratio heating cylinder 11 of injection nozzle 13 and resin stream portion 81 is little; Therefore resin Rn is advancing in heating cylinder 11 under the compressed state; From injection nozzle 13 injection and through after the resin stream portion 81, expand along with entering in the C of die cavity space, and in the C of die cavity space, advance.In addition, the position of screw rod 12 can be made as the residing position, any position of screw rod 12, but in this embodiment, is made as the residing position of screw rod 12 front ends.
Then, screw rod 12 is stopped, but then when the pressurize operation begins, when the power of the force rate screw rod 12 pushing resin Rn of resin Rn pushing screw rod 12 was big, screw rod 12 was retreated, and injection speed becomes negative value.As a result, when pressing step-down not keep appropriate value in the mould, formed products produces and shrinks, and molded item quality descends.To this, can consider that the packing pressure when the pressurize operation begun is set enough highly, but packing pressure is set under the condition with higher; Be difficult to be maintained appropriate value with pressing in the mould; When mould inner pressure ratio appropriate value was high, formed products produced flash, burr etc., and molded item quality descends.
Therefore, in this embodiment, shown in Fig. 4 (b), the front end of the resin Rn in the C of die cavity space arrive till the C bosom, die cavity space during, the position that keeps screw rod 12.
For this reason; Set the speed controlling end position Qe of screw rod 12; When making screw rod 12 stop at that this speed controlling end position Qe goes up and keeping the position of screw rod 12, the compressed resin Rn that wait in the heating cylinder 11 continue to be filled in the C of die cavity space via injection nozzle 13 and resin stream portion 81 owing to expand, shown in Fig. 4 (c); The front end of resin Rn arrives the bosom of die cavity space C, and to fill completely be complete filling.And, when resin press with mould in press and become when equating, heat cylinder 11 interior resin Rn and stop to be filled in the C of die cavity space via injection nozzle 13 and resin stream portion 81.
In addition, when screw rod 12 arrival rates control stop position Qe, the position that keeps screw rod 12, but when the maintenance of position also comprises the situation that the speed advanced in the front and back of screw rod 12 limits.
Yet above-mentioned screw rod 12 is after injection starting position Qa begins to advance, and till stopping at speed controlling end position Qe, the screw stroke Ls that in heating cylinder 11, advanced, pushes and make it forwards to move the resin Rn in the heating cylinder 11 therebetween.Setting speed control end position Qe; Be the amount of pushing Ws so that establish the resin Rn of this moment by the volume that screw rod 12 pushes; When if volume speed controlling end position Qe the place ahead, get into the resin Rn of resin stream portion 81 and die cavity space C from die device 80 inlet (being not shown sprue inlet) this embodiment is Wm1
Ws＞Wm1
Particularly, be controlled to be the fullness rate less than 100 (%) of resin Rn for die cavity space C.In addition, control portion 71 through the operator and set this speed controlling end position Qe.At this, the above-mentioned amount of pushing Ws considers the contraction along with the cooling of resin Rn, be set at volume Wt from the inlet of die device 80 to resin stream portion 81 and die cavity space C about equally, roughly the same.
And, after screw rod 12 arrival rates control end position Qe, the position that keeps screw rod 12.Thus, the volume Wm2 of the resin Rn when the inlet of die device 80 gets into resin stream portion 81 and die cavity space C and carried out complete filling is because expansion increases, and the above-mentioned amount of pushing Ws and volume Wm2 are about equally.That is, resin Rn becomes 100 (%) for the fullness rate of die cavity space C.
After this, beginning pressurize operation applies uniform pressure to the resin Rn that fills in the C of die cavity space.
Therefore, can make the resin that has carried out pressing in the mould after the complete filling when beginning press (having carried out the pressure of adjusting zero point) to equate with injection process.
As a result, after having carried out complete filling, when beginning the pressurize operation, along with beginning, the screw rod 12 of pressurize operation can not retreated in the not shown holding pressure control portion of control part 71.And pressure can not reduce in the mould, can prevent that formed products from producing contraction, therefore can improve molded item quality.
And, when the pressurize operation begins, need not set packing pressure higher, therefore can be maintained appropriate value with pressing in the mould, can prevent that formed products from producing flash, burr etc., can improve molded item quality.In addition, after above-mentioned pressurize operation begins, carry out pressure control according to pressing by the resin of force cell 52 detections.
In this embodiment; The cold pouring channel that the resin stream portion 81 that takes out with formed products has been carried out consideration has been described as running channel; But under the situation of using hot runner; Cull Rn in the running channel of resin stream portion 81, therefore in this case, the parting surface of going into interruption-forming die device 80 of the die device 80 in this embodiment.
Yet, stop at speed controlling end position Qe in order to make screw rod 12, need screw rod 12 be reduced speed now at the assigned position at speed controlling end position Qe rear.Therefore, in this embodiment, be set with the deceleration mode when screw rod 12 is slowed down, for when screw rod 12 is slowed down, make screw rod 12 stop at speed controlling end position Qe accurately, and be set with deceleration starting position Qs.In addition, set deceleration starting position Qs through in control part 71, calculating.
Below, the action of above-mentioned control part 71 is described.
Fig. 1 is the control block diagram of the control part of expression the present invention the 1st embodiment, and Fig. 5 is the figure of action of the injection machine of expression the present invention the 1st embodiment.
Among the figure, the 64th, speed generation portion, this speed generation portion reads the position of magnetic pole θ i that sends here from encoder 62 (Fig. 3), calculates actual injection speed as actual injection speed Vr according to the rate of change of position of magnetic pole θ i; The 65th, position generation portion, this position generation portion reads above-mentioned position of magnetic pole θ i, and the position of calculating screw rod 12 reality is as physical location Qr.At this moment, constitute speed index and positioning index by above-mentioned position of magnetic pole θ i.
In this embodiment, when in timing t 1 start injection operation, the injection speed Vs that in setting apparatus 72 (Fig. 3), sets in advance with the operator advances screw rod 12.That is, when the operator set injection speed Vs in setting apparatus 72, setting apparatus 72 was delivered to control part 71 with injection speed Vs.In this control part 71; Injection speed Vs is via as the switch SW of switching part and be sent to the subtracter 67 as deviation calculation portion; This subtracter 67 reads actual injection speed Vr from speed generation portion 64; And the deviation delta V of calculating actual injection speed Vr and injection speed Vs, V delivers to speed controlling operational part 68 with this deviation delta, and this speed controlling operational part 68 produces current instruction value i according to deviation delta V.
Therefore, injection motor 53 is supplied with electric current I u, Iv, the Iw that produces according to current instruction value i, and drive injection motor 53, screw rod 12 is advanced with injection speed Vs.Thereupon, the resin in the heating cylinder 11 presses P to raise gradually.At this moment, above-mentioned subtracter 67 works as the injection control part.
Yet, when screw rod 12 when timing t 2 arrives above-mentioned deceleration starting position Qs, screw rod 12 is slowed down with deceleration mode Vp.
For this reason; Be equipped with deceleration mode generation portion 66; This deceleration mode generation portion 66 produces deceleration mode Vp, so that the speed controlling end position Qe that can the read operation person in setting apparatus 72, sets makes screw rod 12 stop at this speed controlling end position Qe; And the position that keeps screw rod 12, promptly injection speed is in speed controlling end position Qe vanishing (0).In addition, the kind of considering thickness, the resin Rn of formed products waits sets this deceleration mode Vp, so that during making that screw rod 12 slows down, the resins in the heating cylinder 11 press P to become steady state value.
And; Deceleration mode Vp representes that through each position Qx from above-mentioned deceleration starting position Qs to the screw rod 12 the above-mentioned speed controlling end position Qe and the injection speed V (Qx) of this each position Qx injection speed V (Qx) is set at shape (the being linearity) passing with regulation through the function of regulation in Fig. 5.
And; The 69th, judge whether screw rod 12 arrives the deceleration starting position arrival judging part of deceleration starting position Qs; This deceleration starting position arrive judging part 69 from deceleration mode generation portion 66 read deceleration starting position Qs the deceleration mode Vp, generation portion 65 reads physical location Qr from the position; Screw rod 12 advance with injection speed Vs during, judge whether screw rod 12 arrives deceleration starting position Qs.
Then, when screw rod 12 when timing t 2 arrives deceleration starting position Qs, the deceleration starting position arrives judging part 69 change-over switch SW.The result; The injection speed V (Qx) of the deceleration mode Vp that in deceleration mode generation portion 66, produces delivers to subtracter 67 via switch SW; This subtracter 67 reads and the corresponding injection speed V of physical location Qr (Qx); And the deviation delta V of calculating actual injection speed Vr and injection speed V (Qx), V delivers to speed controlling operational part 68 with this deviation delta, and this speed controlling operational part 68 produces current instruction value i according to deviation delta V.
In addition; In this embodiment; Subtracter 67 reads in the deceleration mode Vp that generates in the deceleration mode generation portion 66, but also can the deceleration mode Vp that in deceleration mode generation portion 66, generates be recorded in the not shown storage device in advance, reads deceleration mode Vp from storage device.
Therefore; Injection motor 53 is supplied with electric current I u, Iv, the Iw that produces according to current instruction value i, drive injection motor 53, screw rod 12 is advanced with injection speed V (Qx); Slow down according to deceleration mode Vp, at timing t 3 arrival rates control end position Qe and stop.At this moment, subtracter 67 works as deceleration control portion.
In addition, from the decelerating to during timing t 3 screw rods 12 arrival rates control end position Qe of timing t 2 beginning screw rods 12, it is steady state value that the resins in the heating cylinder 11 are pressed P.
So; When screw rod 12 is stopped; As stated; Compressed resin Rn in the heating cylinder 11 continues to be filled in the C of die cavity space via injection nozzle 13 and resin stream portion 81, when the front end of resin Rn arrive the bosom of die cavity space C, when having carried out complete filling, the timing t 4 that is filled in the C of die cavity space finishes.Therebetween, resin presses P to reduce gradually, and becomes zero in timing t 4.
Therefore, the not shown end-of-fill judgment processing portion of control part 71 reads the resin that is detected by force cell 52 and presses P, presses P whether to become setting, is zero in this embodiment through this resin, judges whether filling finishes.Then, when end-of-fill, above-mentioned holding pressure control portion begins the pressurize operation.
In addition; When the thickness of formed products is big; Shown in the dotted line of Fig. 4, screw rod 12 advances with the injection speed Vs ' that equates with injection speed Vs at the timing t 1 ' start injection more Zao than timing t 1; And reducing speed now than timing t 2 Zao timing t 2 ', the deceleration mode Vp ' littler than deceleration mode Vp through rate of change comes to slow down lentamente.Therefore, when the thickness of formed products was big, injection starting position Qa ' and deceleration starting position Qs ' were set at the rear of injection starting position Qa and deceleration starting position Qs.
So, in this embodiment, before the complete filling of carrying out resin Rn, make screw rod 12 stop at speed controlling end position Qe, therefore can be maintained appropriate value, can prevent that formed products from producing contraction, flash, burr etc. pressing in the mould.Therefore, can improve molded item quality.
And, can directly set the speed controlling end position Qe of screw rod 12, so can correctly set the speed controlling end position Qe of screw rod 12 through setting apparatus 72.Therefore, can set the amount Wm that gets into the resin Rn of die cavity space C from the inlet of die device 80 accurately, therefore can correctly manage the loading (injection volume) of resin Rn.As a result, can make molded item quality stable.
Then, the present invention's the 2nd embodiment that can directly set the deceleration starting position Qs of screw rod 12 through setting apparatus 72 is described.In addition, give identical symbol for having with the part of the 1st embodiment same configuration, the invention effect that produces for having identical construction is quoted the effect of this embodiment.
Fig. 6 is the control block diagram of the control part of expression the present invention the 2nd embodiment.
At this moment; Operator setting speed control end position Qe not in setting apparatus 72 (Fig. 3); And setting deceleration starting position Qs; Therefore deceleration mode generation portion 66 waits according to the kind of deceleration starting position Qs, the thickness of considering formed products, resin Rn and sets deceleration mode Vp, so that during making that screw rod 12 as injection member slows down, resin pressure P becomes steady state value.And, in deceleration mode Vp, injection speed is become zero point and is set in speed controlling end position Qe.
And; The deceleration starting position arrives that judging part 69 72 reads the deceleration starting position Qs that set by the operator from the configuration part, generation portion 65 reads physical location Qr from the position; During making that screw rod 12 advances with injection speed Vs, judge whether screw rod 12 has arrived deceleration starting position Qs.
So, in this embodiment, can directly set the deceleration starting position Qs of screw rod 12, therefore can correctly set the deceleration starting position Qs of screw rod 12 through configuration part 72.Therefore, begin correctly to manage power till stop from the deceleration of screw rod 12 by screw rod 12 treedozer fat.As a result, the interior pressure of mould stablized.Especially shown in the dotted line of Fig. 4, under the situation of thicker formed products that is shaped, can set deceleration starting position Qs corresponding to resin pressure with uprising.
In above-mentioned each embodiment; Arrive in the judging part 69 in the deceleration starting position; The kind of considering thickness, the resin Rn of formed products waits sets deceleration mode Vp, but also can pass through operator's operating and setting device 72, in deceleration mode generation portion 66, produces the deceleration mode of regulation thus.At this moment, the deceleration mode that is produced is recorded in the storage device.
And, in above-mentioned each embodiment, detect resin pressure P, but also can near the injection nozzle 13 in the heating cylinder 11, set pressure sensor through force cell 52, detect resin pressure through this pressure sensor.
In addition, the present invention is not limited to above-mentioned each embodiment, can carry out various distortion according to spirit of the present invention, and these distortion are not precluded within outside the scope of the present invention.
Claims (9)
1. injection control apparatus is characterized in that having:
(a) injection member sets in the cylinder parts to rotating freedom and advance and retreat freedom;
(b) injection drive division is used to make above-mentioned injection member to advance; And
(c) control part is controlled above-mentioned drive division, makes above-mentioned injection member advance to the speed controlling end position from the injection starting position with carrying out speed controlling;
(d) above-mentioned control part is controlled; So that be located at make injection member from above-mentioned injection starting position advance to above-mentioned speed controlling end position during, moulding material is the amount of pushing Ws by the volume that injection member pushes; When the volume that gets into the moulding material in die cavity space from the die device inlet when if injection member arrives above-mentioned speed controlling end position is Wm1, Ws＞Wm1.
2. like the injection control apparatus of claim 1 record, it is characterized in that,
Above-mentioned control part keeps the position of above-mentioned injection member after above-mentioned injection member arrival rate control end position, so as to establish expansion owing to moulding material become more than after the volume of moulding material during into Wm2, the above-mentioned amount of pushing Ws and volume Wm2 are about equally.
3. like the injection control apparatus of claim 1 record, it is characterized in that,
Be set with the deceleration starting position at the rear of above-mentioned speed controlling end position.
4. like the injection control apparatus of claim 3 record, it is characterized in that having:
(a) deceleration mode generation portion, the deceleration mode of the injection speed till producing from the deceleration starting position to the speed controlling end position;
(b) the deceleration starting position arrives judging part, judges whether injection member arrives above-mentioned deceleration starting position; And
(c) deceleration control portion when injection member arrives the deceleration starting position, slows down injection member through above-mentioned deceleration mode.
5. like the injection control apparatus of claim 4 record, it is characterized in that,
Above-mentioned deceleration mode generation portion produces deceleration mode according to the speed controlling end position of setting through setting apparatus.
6. like the injection control apparatus of claim 4 record, it is characterized in that,
Above-mentioned deceleration mode generation portion produces deceleration mode according to the deceleration starting position of setting through setting apparatus.
7. injection control apparatus is characterized in that having:
(a) injection member sets in the cylinder parts to rotating freedom and advance and retreat freedom;
(b) injection drive division is used to make above-mentioned injection member to advance; And
(c) control part is controlled above-mentioned drive division, makes above-mentioned injection member advance to the speed controlling end position from the injection starting position with carrying out speed controlling; And
(d) above-mentioned control part is controlled; So that be located at make injection member from above-mentioned injection starting position advance to above-mentioned speed controlling end position during, moulding material is the amount of pushing Ws by the volume that injection member pushes; If enter the mouth the volume in die cavity space when being Wt from die device; The above-mentioned amount of pushing Ws and volume Wt about equally, and the fullness rate less than 100% of the above-mentioned moulding material in the die cavity space of above-mentioned injection member when arriving above-mentioned speed controlling end position.
8. like the injection control apparatus of claim 7 record, it is characterized in that,
Above-mentioned control part, the position that after above-mentioned injection member arrives above-mentioned speed controlling end position, keeps above-mentioned injection member is so that because the expansion of moulding material and shaping material become 100% for the fullness rate in die cavity space.
9. injection control method; It is the injection control method of injection machine; This injection machine has and in the cylinder parts, sets to rotating freedom and the injection member freely and be used to injection drive division that injection member is advanced of advancing and retreat, and this injection control method is characterised in that
(a) control above-mentioned drive division, make above-mentioned injection member advance to the speed controlling end position with carrying out speed controlling from the injection starting position; And
(b) control; So that be located at make injection member from above-mentioned injection starting position advance to above-mentioned speed controlling end position during, moulding material is the amount of pushing Ws by the volume that injection member pushes; When the volume that gets into the moulding material in die cavity space from the die device inlet when if injection member arrives above-mentioned speed controlling end position is Wm1, Ws＞Wm1.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP224159/2008 | 2008-09-01 | ||
| JP2008224159A JP2010058299A (en) | 2008-09-01 | 2008-09-01 | Injection control device and injection control method |
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| CN101664988A CN101664988A (en) | 2010-03-10 |
| CN101664988B true CN101664988B (en) | 2012-12-12 |
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| JP (1) | JP2010058299A (en) |
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| DE (1) | DE102009039582A1 (en) |
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| US8715547B2 (en) | 2011-02-24 | 2014-05-06 | Mold-Masters (2007) Limited | Closed loop control of auxiliary injection unit |
| JP5823210B2 (en) * | 2011-08-31 | 2015-11-25 | 住友重機械工業株式会社 | Injection molding machine and setting support device for injection molding machine |
| JP6169633B2 (en) * | 2015-03-04 | 2017-07-26 | ファナック株式会社 | Pressure control device for injection molding machine |
| JP6935182B2 (en) * | 2016-10-12 | 2021-09-15 | 芝浦機械株式会社 | Injection molding machine |
| CN107310118B (en) * | 2017-07-26 | 2020-04-10 | 华域视觉科技(上海)有限公司 | Switching method from speed control to pressure control in injection molding process and injection mold |
| JP7277327B2 (en) * | 2019-09-20 | 2023-05-18 | ファナック株式会社 | CONTROL DEVICE AND CONTROL METHOD FOR INJECTION MOLDING MACHINE |
| CN113043562B (en) * | 2021-03-10 | 2021-11-30 | 博创智能装备股份有限公司 | Dynamic compensation system based on injection molding product quality control |
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| CN1504318A (en) * | 2002-11-29 | 2004-06-16 | 上海纯青实业有限公司 | Plastic moulding method |
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| JPH0667581B2 (en) * | 1986-04-07 | 1994-08-31 | 三菱重工業株式会社 | Control method of injection filling pressure |
| JPH0641159B2 (en) * | 1986-07-28 | 1994-06-01 | 三菱重工業株式会社 | Injection control method and apparatus for injection molding machine |
| JP3008363B2 (en) * | 1993-06-18 | 2000-02-14 | 住友重機械工業株式会社 | Injection equipment of injection molding machine |
| JPH07299850A (en) * | 1994-04-30 | 1995-11-14 | Tsuoisu Kk | Injection molding method |
| JP3943887B2 (en) * | 2001-10-10 | 2007-07-11 | 三菱重工プラスチックテクノロジー株式会社 | Electric injection molding machine |
| JP4724096B2 (en) * | 2006-11-21 | 2011-07-13 | 日精樹脂工業株式会社 | Control method of injection molding machine |
| JP2008224159A (en) | 2007-03-14 | 2008-09-25 | Mitsubishi Electric Corp | Refrigerating cycle device, refrigerating device, and air conditioner |
| JP4537441B2 (en) * | 2007-12-10 | 2010-09-01 | 住友重機械工業株式会社 | Control method of injection molding machine |
| JP5092927B2 (en) * | 2008-06-20 | 2012-12-05 | ソニー株式会社 | INJECTION MOLDING CONTROL METHOD AND INJECTION MOLDING CONTROL DEVICE |
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- 2008-09-01 JP JP2008224159A patent/JP2010058299A/en active Pending
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| US5817258A (en) * | 1993-12-28 | 1998-10-06 | Fanuc Ltd. | Method of injection control for injection molding machine |
| CN1316322A (en) * | 2000-04-04 | 2001-10-10 | 住友重机械工业株式会社 | Injection method of injection machine and its control system |
| CN1504318A (en) * | 2002-11-29 | 2004-06-16 | 上海纯青实业有限公司 | Plastic moulding method |
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| DE102009039582A1 (en) | 2010-04-15 |
| CN101664988A (en) | 2010-03-10 |
| JP2010058299A (en) | 2010-03-18 |
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