CN108099145A - A kind of injection molding machine demoulds control device - Google Patents
A kind of injection molding machine demoulds control device Download PDFInfo
- Publication number
- CN108099145A CN108099145A CN201711370376.1A CN201711370376A CN108099145A CN 108099145 A CN108099145 A CN 108099145A CN 201711370376 A CN201711370376 A CN 201711370376A CN 108099145 A CN108099145 A CN 108099145A
- Authority
- CN
- China
- Prior art keywords
- knockout pin
- elastic force
- spring
- propulsion
- retentivity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- B29C45/7626—Measuring, controlling or regulating the ejection or removal of moulded articles
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a kind of controller of the mould emptier in injection molding machine, for suitably setting the final position of the knockout pin propulsion of the mould emptier.The final position of the propulsion is set to position of the elastic force no more than the retentivity of brake apparatus of returning spring, which is used to knockout pin being maintained at final position.During knockout pin propulsion, spring force is detected.It determines the position of the knockout pin in a flash before the spring force detected is more than the retentivity of brake apparatus, and is shown on the desplay apparatus as normal place.The final position of knockout pin propulsion is set to be no more than the definite normal place.
Description
Technical field
The invention belongs to demould field, and in particular to a kind of injection molding machine demoulds control device.
Background technology
In injection molding machine, in mold is injected resin into and after condensation, mold is opened, and a mould emptier will be at this
Molding product pop-up in mold comes.The mould emptier against the elastic force of returning spring by making knockout pin propulsion with protrusion
Into the chamber of the mold, to demould molding product, which is used to knockout pin returning to a retracted position.Pneumatic cylinder,
Linear motor or servo motor can be used as carrying out the knockout pin driving source of propulsion.Brake apparatus is used for
The retentivity against spring force is generated, knockout pin is maintained at the final position of propulsion (for example, seeing JP10-
296818A)
Since knockout pin against spring force is maintained at final position by brake apparatus with retentivity, so before knockout pin
To the final position of movement, the elastic force for the spring that retentivity has to be larger than.In the case where knockout pin is held in the situation in final position,
If the elastic force of spring is more than the retentivity of the brake apparatus, then for generating the friction member of frictional force, such as brake rubber block and
The brake apparatus ground strap of the brake, will be by excessive wear, so that cause the failure of the brake apparatus.
The content of the invention
The present invention provides a kind of injection molding machine demoulding control device, for knockout pin to be made to return to the spring force of retracted position not
More than for knockout pin to be maintained to the retentivity in final position.The mould emptier of the controller control injection molding machine of the present invention, should
Injection molding machine has for making knockout pin propulsion to be projected into the device in mold, returns to knockout pin for generating elastic force
To the spring of retracted position, the brake apparatus in final position is maintained at for generating retentivity by knockout pin.The controller bag
It includes：Positional detecting device, for detecting the position of knockout pin；Elastic force detection device, in knockout pin since retracted position
It carries out detecting spring force during propulsion；Determining device for determining the normal place of knockout pin, in the position, is visited
The spring force measured is equal to the retentivity of brake apparatus；And display device, for showing the normal place of knockout pin, the standard
Position is used to set the final position of knockout pin propulsion.With reference to the normal place of the detection, operator can set the demoulding
The final position of the propulsion of bar, the position is than definite normal place closer to retracted position.The controller includes：Position
Detection device, for detecting the position of knockout pin；Elastic force detection device, for before knockout pin is proceeded by from retracted position to
Spring force is detected during movement；Determining device, for determining the normal place of knockout pin, in the position, the bullet that detects
Spring force is equal to the retentivity of brake apparatus；With in standard of the default final position of knockout pin propulsion than knockout pin
When position is further from retracted position, the device that gives a warning.Therefore, if the final position of the propulsion of the knockout pin is pre-
It first sets, and the elastic force generated in the position spring is more than the retentivity of brake apparatus, then prompts one to be alerted to operator, to change
Become the final position of the knockout pin propulsion, in the position, the elastic force that spring generates is not more than the retentivity of brake apparatus.
Elastic force detection device can based on driving knockout pin propulsion servo motor electric current or pass through estimate apply
Spring force is detected in the observer of the load on servo motor or the strain gauge by providing in mould emptier.
Advantageous effect：
According to the present invention, the final position of knockout pin propulsion is set as suitable position, in the position returning spring
Generation, so as to prevent brake apparatus by excessive wear, reduces the failure of brake apparatus no more than the elastic force of brake apparatus retentivity.
Description of the drawings
Fig. 1 is the schematic diagram of the demoulding controller of the present invention；
Fig. 2 is the schematic diagram for showing the principle of the invention；
Fig. 3 is that the processor of demoulding controller according to a first embodiment of the present invention performs the flow chart of processing.
Specific embodiment
In Fig. 1, the mould release disc 2 with knockout pin 3 is mounted in mold 1.Knockout pin 3 is by propulsion to be projected into mould
In the chamber of tool 1, go to come the molding product being stuck in the chamber of mold 1 pop-up.Spring 4 is plugged into knockout pin 3, and is arranged at
Between the inner wall of mould release disc 2 and mold 1, to generate elastic force, the chamber of knockout pin 3 and mould release disc 2 from mold 1 is promoted to be retracted into retraction
Position.Demoulding column 5 is connected to mould release disc 2, against the elastic force of spring 4, knockout pin 3 is made to travel forward with mould release disc 2 (Fig. 1's
Knockout pin 3 is dealt into chamber by right side).The near-end of demoulding column 5 is fixed on installing plate 6, which has connects with ball screw 7
The ball cap nut of conjunction.By a transmission mechanism, such as Timing Belt, servo motor 9 drives ball screw 7, which has
Brake apparatus built in one.A location/velocity detector 10 is provided in servo motor 9, to detect the rotation position of motor, is obtained
Obtain position and the speed of knockout pin 3.Using one for controlling the controller of injection molding machine, one is formed for controlling the de- of mould emptier
Mould controller 20.Controller 20 has the CNCCPU27 as numerically controlled microprocessor, micro- place as PLC technology
The PCCPU26 of device and the servo CPU22 as servo-controlled microprocessor are managed, they are connected with each other by bus 25, passed through
The output chosen the input of processor or come from processor, enables information to transmit between them.PCCPU26 is connected to
For controlling the sequencer program of injection molding machine sequence motion, which calculates for temporary for ROM30 and RAM31, the ROM30 storage
Data, CNCCPU27 are connected to ROM32 and RAM13, and ROM32 storages are automatically brought into operation journey for usually control injection molding machine
Sequence, the RAM13 calculate data for temporary.Servo CPU22 is connected to ROM23 and RAM24, which is exclusively used in servo
The control program of control, the SERVO CONTROL are used for execution position, speed and current control, which is used for temporal data.This
Outside, servo CPU22 is connected to the servo amplifier 21 of servo motor 9, according to from CPU22 come instruction, the servo motor control 9
For driving the mould emptier, servo is fed back to from the output for the location/velocity detector 10 being assemblied on servo motor 9
CPU22.The position of the rotation position of servo motor 9, i.e. knockout pin 3, based on from location/velocity detector 10 come position feedback
Signal is updated, and is stored in current position storage register.It is omitted to drive clamping and connection in Fig. 1
To the servo amplifier of the servo motor of the injection mechanism of servo CPU22.One nonvolatile memory 28 stores for a data
RAM, is connected to bus 25, and as molding data storage, for store on injection moulding operation molding condition and various set
Definite value, parameter and macro-variable.For the present invention, the default retentivity of brake apparatus and the default terminal of knockout pin propulsion
Position is stored in non-variable memory 28.In addition, manual data input (MDI) device 29 with display device is connected to always
Line 25.The MDI devices 29 can perform the screen display of figure and function menu and utilize number key and various functions key input each
Kind data.The display device can be by compositions such as CRT, liquid crystal displays.The above-mentioned hardware configuration and traditional electronics of controller
Injection molding machine has no difference, and PMCCPU26 controls the sequence motion of injection molding machine, CNCCPU29 control moldings in traditional injection molding machine
Operation.Associated with the present invention, CNCCPU27 distributes movement instruction to servo motor 9, and servo CPU22 performs SERVO CONTROL,
This be referred to as digital servo processing, it includes the movement instruction based on distribution and from location/velocity detector 10 come position and
The position loop control of the feedback signal of speed, speed loop control and current cycle control, carry out drive control servo motor 9 and hold
Row is hit by a bullet out molding product from mold 1.
Fig. 2 is shown to be filled with the elastic force of the spring 4 of the change in location of knockout pin 3 with the braking being built in servo motor 9
The retentivity comparison put, to explain the principle of the present invention.In fig. 2, axis of abscissas represents the position of the knockout pin of propulsion,
Axis of ordinates represents the elastic force of the spring 4 changed with the propulsion of knockout pin 3.Knockout pin 3 and mould release disc 2 are driven by spring 4
To the back-end location in stroke of motion (motionstroke), the compression of spring 4 is as knockout pin 3 is (with demoulding column 5 and the demoulding
Disk 2) propulsion and become larger, so as to which the elastic force of spring 4 linearly increases according to coefficient of elasticity.If the end of spring propulsion
Point position is arranged on regions of the elastic force Y equal to or less than the retentivity Fb for providing the brake apparatus in servo motor 9 of spring
In, then knockout pin is just maintained at final position by the retentivity of brake apparatus enough, will not cause problem.It is if however, de-
The final position of 3 propulsion of tringle is arranged in regions of the spring force Y more than brake apparatus retentivity F, then braking dress
The retentivity F put is just not enough to that knockout pin steadily is maintained at final position, and the friction member of brake apparatus is made excessively to grind
Damage.Therefore, according to the present invention, spring 4 generate elastic force and brake apparatus retentivity F it is equal when knockout pin 3 position determined
For the normal place P in the final position of 3 propulsion of knockout pin, (moved closer to retracted position than normal place P for setting
The back-end location of stroke) final position.
Fig. 3 show first embodiment according to the present invention by CNCCPU27 perform, for setting knockout pin before
Processing to the final position of movement.In a mold under the situation without molding product, for example, and then fill a mold
It is fitted on after an injection molding machine, so as to which knockout pin 3 is not in contact in propulsion and molding product, when the instruction for determining normal place
When input from display/MDI devices 29, CNCCPU27 is carried out decimal system processing as shown in Figure 3.CNCCPU27 outputs one
Movement instruction, by the front position of 3 propulsion of knockout pin to the stroke of motion of knockout pin 3.Servo CPU22 execution positions and speed
The feedback control of degree drives servo motor 9 (step a1) according to movement instruction by servo amplifier 21.Next,
CNCCPU27 detects the elastic force (step a2) of spring 4.The elastic force is that the driving current based on servo motor 9 is detected.By
In no molding product in mold 1, therefore knockout pin 3 does not pop up any molding product in propulsion.It is applied to servo
Load on motor 9 is the elastic force generated by the spring 4 of mould emptier.Since the driving current of servo motor 9 is proportional to application
Load on servo motor 9, therefore based on the driving current of servo motor 9, the elastic force of spring 4 can be detected.Instead of base
The elastic force of spring 4 is detected in the driving current of servo motor 9, the elastic force of spring 4 can be used for by being assemblied on demoulding column 5
The strain gauge (straingauge) for the load that detection is applied on demoulding column 5 measures.In addition, various apply for estimating
The interference estimation observer of interference load on servo motor is well known in the art.For example, it is known that a kind of observer,
Based on the actual speed sent to the present instruction of servo motor and servo motor, the load on servo motor is estimated.It is such
Observer (being made of software) may be integrally incorporated to control in the program of the servo CPU22 of servo motor 9, and detection, which is applied to, to be watched
Take the load on motor 9, that is, the elastic force of spring 4.So detect the elastic force Y of spring 4 and the retentivity F phases of brake apparatus
Compare (step a3), if the elastic force Y detected is less than retentivity F, register Emax is located in the current location of knockout pin 4
In (step a4), the current location of the knockout pin 4 based on from location/velocity detector 10 come feedback signal be stored in present bit
It puts in storage register.Then, it is determined that whether knockout pin reaches the front end (step a4) for the stroke specified in step a2, if
It does not reach, program returns to step a2 and goes to perform the processing of step a2 and subsequent step.Using above procedure, what is detected
In the case that elastic force Y is less than the retentivity F of brake apparatus, the position of knockout pin is updated, and is stored in register Exam.
On the other hand, if elastic force Y be confirmed as be more than brake apparatus retentivity F, do not perform the register in step a4
The update of Emax, program are carried out from step a3 to a5.Since the normal place of the knockout pin 3 of display is no more than braking in elastic force
The final position of the propulsion of knockout pin 3 is set to be no more than by the position of front end, operator under the retentivity situation of device
The position of the normal place of display.Therefore, the final position of 3 propulsion of knockout pin is set as the elastic force of spring 4 no more than system
The position of the retentivity of dynamic device.
In the above-described first embodiment, when elastic force is less than the retentivity of brake apparatus, the current location of knockout pin 3
It is stored in register Emax, so that it is determined that being taken off in a process cycle before elastic force is more than the retentivity system of brake apparatus
The position of tringle (i.e. in this position, elastic force is no more than retentivity).Selectively, can be more than brake apparatus for the first time by elastic force
Retentivity when knockout pin position be stored in register Emax.For example, in the processing of Fig. 3, determined when in step a3
When elastic force Y is more than retentivity F, program may proceed to step a4.In step a4, the current location of knockout pin is stored in deposit
In device Exam, mark is set as " 1 ".After mark is set, program is carried out to step a5.In step a5, determine that knockout pin is
The no front end for reaching stroke of motion.
In this case, due to when the elastic force Y of spring is more than for the first time the retentivity E of brake apparatus, storing
The position of knockout pin 3 in register Emax is displayed on the screen of display/MDI devices 29, it is necessary to by knockout pin
The final position of propulsion is set to normal place than display away from retracted position more recently.
In the above-described embodiments, in propulsion of the knockout pin from the rear end of stroke of motion to front end, spring is detected
Elastic force, to determine that spring force is more than the knockout pin position of the retentivity of brake apparatus.However, it is also possible in operation servo motor
9 to detect the elastic force of spring during driving one predetermined amount of knockout pin, if the spring force detected is no more than brake apparatus
Retentivity, then when again drive the predetermined amount of servo motor 9 when detect spring force with detect detection spring force be more than
The position of brake apparatus retentivity.Based on the position detected, the final position of the propulsion of knockout pin can be set.
In addition, in the above-described embodiments, servo motor is as the driving source that knockout pin is carried out to propulsion.The present invention can
Applied in mould emptier, hydraulic cylinder or linear motor are used as driving source in the mechanism.In addition, in above embodiment
In, brake apparatus is built in servo motor, is passed however, brake apparatus can be provided in one between driving source and demoulding column
It send in component, which removes driving mould emptier for transmitting driving force.
The sequencing of above example only for ease of description, does not represent the quality of embodiment.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that：It still may be used
To modify to the technical solution recorded in foregoing embodiments or carry out equivalent substitution to which part technical characteristic；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical solution spirit and
Scope.
Claims (4)
1. one kind, for injection molding machine to be controlled to demould control device, which has to be projected into knockout pin propulsion
Device in mold makes knockout pin return to the spring of retracted position for generating elastic force, for generating retentivity will be de-
Tringle is maintained at the brake apparatus in final position, and the controller includes：Positional detecting device, for detecting the position of knockout pin
It puts；Elastic force detection device, for detecting spring force during knockout pin proceeds by propulsion from retracted position；It determines
Device, for determining the normal place of knockout pin, in the position, the spring force detected is equal to the retentivity of brake apparatus；
And display device, for showing the normal place of knockout pin, which is used to set the terminal position of knockout pin propulsion
It puts.
2. controller according to claim 1, wherein, the elastic force detection device is based on driving knockout pin propulsion
The elastic force of the gallon spring of servo motor.
3. controller according to claim 1, wherein, the elastic force detection device detects spring bullet by an observer
Power, for the observer for estimating the load being applied on servo motor, the servo motor is preceding to fortune for knockout pin to be driven to carry out
It is dynamic.
4. controller according to claim 1, wherein, the elastic force detection device is by providing the change in mould emptier
Shape measuring appliance detects spring force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711370376.1A CN108099145A (en) | 2017-12-19 | 2017-12-19 | A kind of injection molding machine demoulds control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711370376.1A CN108099145A (en) | 2017-12-19 | 2017-12-19 | A kind of injection molding machine demoulds control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108099145A true CN108099145A (en) | 2018-06-01 |
Family
ID=62210903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711370376.1A Pending CN108099145A (en) | 2017-12-19 | 2017-12-19 | A kind of injection molding machine demoulds control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108099145A (en) |
-
2017
- 2017-12-19 CN CN201711370376.1A patent/CN108099145A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180601 |
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| WD01 | Invention patent application deemed withdrawn after publication |