CN103568209B - Injection moulding machine with resin quantity delivered adjustment portion - Google Patents
Injection moulding machine with resin quantity delivered adjustment portion Download PDFInfo
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- CN103568209B CN103568209B CN201310316642.8A CN201310316642A CN103568209B CN 103568209 B CN103568209 B CN 103568209B CN 201310316642 A CN201310316642 A CN 201310316642A CN 103568209 B CN103568209 B CN 103568209B
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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
- B29C45/18—Feeding the material into the injection moulding apparatus, i.e. feeding the non-plastified material into the injection unit
- B29C45/1808—Feeding measured doses
-
- 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
-
- 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
- B29C2945/76013—Force
-
- 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
-
- 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
- B29C2945/76351—Feeding
- B29C2945/76354—Feeding raw materials
-
- 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
- B29C2945/76367—Metering
-
- 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
- B29C2945/76585—Dimensions, e.g. thickness
- B29C2945/76591—Dimensions, e.g. thickness volume
-
- 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
- B29C2945/76662—Injection unit hopper
-
- 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
- B29C2945/76829—Feeding
- B29C2945/76832—Feeding raw materials
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The present invention provides a kind of injection moulding machine with resin quantity delivered adjustment portion.Resin quantity delivered adjustment portion detection injection screw screw rod resistance suffered in the axial direction, controls the quantity delivered of resin material so that the resistance detected is consistent with predetermined value.Thus, it is possible to keep appropriate starvation to carry out material supply.
Description
Technical field
The present invention relates to a kind of injection moulding machine, the more particularly to injection moulding machine with resin quantity delivered adjustment portion.
Background technology
As the method for the particle for supplying moulding material to the injection cylinder of injection moulding machine, typically use with lower section
Method, particle is stored in the feed hopper set with injection cylinder UNICOM, is sent into particle using the deadweight of the particle of the storage and is noted
Mould cylinder.At this moment, the state of the resin supply mouth of injection cylinder is the state full of particle（Fill state）.
On the other hand, fill supply for the particle, it is known that so-called hungry supply mode, i.e., marginally supply every time
Particle is so that the resin supply mouth of injection cylinder becomes rarefaction state.For example, Unexamined Patent 5-318531 publications disclose a kind of skill
Art, between the supply source and injection cylinder of particle set particle loader, by increase and decrease the feeding speed of the particle loader come
Control the feed speed of particle.
When carrying out hungry supply, it is contemplated that can have the following effects, the gas produced in injection cylinder is promoted to be supplied from resin
Mouth discharge, or suppress because the injection inside wall of cylinder near resin supply mouth and resin material friction cause the injection inside wall of cylinder to grind
Damage.But, when the density state of the resin material of resin supply mouth（Starvation）When changing, the resin in measurement process
Plasticization quality is changed, and bad influence can be produced to Forming Quality.Therefore, when carrying out hungry supply, exist to keep
Starvation is the problem of constant state must carry out material supply.
JP 2002-248655 publications disclose a kind of technology, set detection screw slot the supply unit of close screw rod
The moulding material test section of interior moulding material, the supply of resin material is controlled according to the testing result of the moulding material test section
Amount so that moulding material will not 100% be full of screw slot.But, there is problems with, it is necessary to for detecting screw slot in the technology
The special test section of interior moulding material.
JP 53-11957 publications disclose a kind of technology, the torque of the screw rod rotation of detection measurement process, adjustment
The quantity delivered of raw material makes the detection torque consistent with a reference value.But, there is problems with the technology, sometimes due to resinous wood
The species starvation of material is changed but the torque of screw rod rotation does not change, and the torque that can not now be rotated according to screw rod is controlled
Starvation processed.
Unexamined Patent 1-171830 publications disclose a kind of technology, actual time of measuring when judging plasticization process and pre-
Difference between the reference measurement time first set, the material quantity delivered of material feeding apparatus is controlled according to the result of determination.But,
There is problems with the technology, because time of measuring is changed according to the size of screw rod rotary speed, therefore can not be correctly
Judge starvation.
Unexamined Patent 3-114813 publications disclose a kind of raw material feed device, and it is entered using the raw material of colour switching object
When row colour switching is operated, intermittently switch resin channels material resin is intermittently supplied into feeder.In the raw material
In feedway, when the supply that total rotation number that setting elapsed time or screw rod rotate is used as decision colour switching resin starts
Between judgment standard.
Unexamined Patent 3-118132 publications disclose a kind of injection moulding machine, according to each portion for being disposed in injection moulding machine
The metrical information of sensor judges whether each measurement data corresponding with multiple monitoring project difference set in advance is permitting
Perhaps in the range of, to be monitored.In the injection moulding machine, screw rod rotation of the accumulation computing from the rotation start time of screw rod
Amount, the screw rod rotation amount is used as detection project when loading, a measurement process.
JP 2012-000962 publications disclose the screw rod rotation amount in a kind of technology, detection predetermined interval, in order that
The screw rod rotation amount detected turns into predetermined desired value, adjusts the resin quantity delivered of resin supply unit.
JP 2001-347545 publications disclose a kind of technology, trap material amount in detection injection cylinder or with position
The physical quantity that the Density Distribution put accordingly changes, the material quantity delivered for causing weight feed portion according to the testing result becomes
Change.
The content of the invention
Therefore, the present invention in view of above-mentioned prior art problem and propose, its object is to provide one kind to use
In the special test section of the moulding material in detection screw slot, and it will not be influenceed by the size of measurement rotary speed,
Appropriate starvation can be kept to carry out the injection moulding machine with resin quantity delivered adjustment portion of material supply.
Before the injection moulding machine of the present invention has injection cylinder, screw rod, drives up the screw rod of the screw rod in forward-reverse side
Enter to retreat drive division, the power test section for the power that the detection screw rod is subject in the axial direction, supply resinous wood into the injection cylinder
The resin material supply unit of material, and be also equipped with：Screw rod drag evaluation portion, it calculates spiral shell according to the detected value of the power test section
Bar resistance；Resin quantity delivered adjustment portion, it becomes big with the screw rod resistance, supplies the resin of the resin material supply unit
Amount diminishes.
The screw rod drag evaluation portion calculate since after decompression process terminates to screw rod advance any time
The absolute value of the detected value of the power test section, is used as screw rod resistance.
The screw rod drag evaluation portion calculate from detected value nondecreasing moment of power test section described in decompression process to
The power test section of any time between at the time of the detected value of the power test section starts to increase during screw rod advances
Detected value absolute value, be used as screw rod resistance.
The injection moulding machine also has the resin pressure test section of the resin pressure in front of detection screw rod, the screw rod resistance
Power calculating part subtracted from the detected value of the power test section detected value and the screw sections face of the resin pressure test section
The calculating of long-pending product value, regard the absolute value of calculated value as screw rod resistance.
The injection moulding machine also has the resin pressure test section of the resin pressure in front of detection screw rod, the screw rod resistance
The value that the area of section of detected value divided by screw rod that power calculating part carries out the power test section is obtained subtracts the resin pressure inspection
The calculating of the detected value in survey portion, regard the absolute value of calculated value as screw rod resistance.
The resin quantity delivered adjustment portion adjusts the resin quantity delivered of the resin material supply unit, so that the screw rod hinders
Power turns into predetermined desired value.
According to the present invention it is possible to a kind of special test section for the moulding material that need not be detected in screw slot is provided, and
It will not be influenceed by the size of measurement rotary speed, keep appropriate starvation to carry out material supply, supplied with resin
Injection moulding machine to amount adjustment portion.
Brief description of the drawings
Fig. 1 is the block diagram for the mode for illustrating the injection moulding machine with resin quantity delivered adjustment portion of the present invention.
Fig. 2 be according to since decompression process after the completion of to screw rod advance any time screw rod suffered by power（Spiral shell
Bar resistance）Absolute value carry out the flow chart of the processing of resin quantity delivered regulation.
Fig. 3 is according to spiral shell during advancing to screw rod the power nondecreasing moment suffered by the screw rod since decompression process
The absolute value of the power suffered by any time screw rod between at the time of power suffered by bar starts increase carries out resin quantity delivered regulation
Processing flow chart.
Fig. 4 is that basis removes the resistance of the screw rod after the influence that the resin pressure P in front of screw rod is caused from the power D suffered by screw rod
Power, carries out the flow chart of the 1st of the processing of resin quantity delivered regulation.
Fig. 5 is to remove according in the value obtained from the power D divided by the area of section of the screw rod suffered by screw rod in front of screw rod
Screw rod resistance after the influence that resin pressure P is caused, carries out the flow chart of the 2nd of the processing of resin quantity delivered regulation.
Embodiment
In the state of the resin supply mouth of injection cylinder is full of particle（That is, starvation is close situation）, for screw rod
Forward-reverse action, the resin of the slush state of screw root turns into drag, screw rod by with direct of travel opposite direction
Resistance（Hereinafter, the resistance is referred to as " screw rod resistance "）.On the other hand, in the case where starvation is sparse, in screw rod
The resin of root slush state is few, therefore screw rod resistance is small.
Currently invention addresses the characteristic, the screw rod resistance being subject in the axial direction according to screw rod suitably controls resin material
Quantity delivered.That is, the screw rod resistance that detection screw rod is subject in the axial direction, resin material is reduced as the resistance detected becomes big
Quantity delivered, thus keep appropriate starvation to carry out material supply.
Illustrate the injection moulding machine with resin quantity delivered adjustment portion of the present invention using Fig. 1.
Movably and around the central shaft rotatably by injection moulding machine on the central axis direction of injection cylinder 2
Screw rod 1 is inserted into injection cylinder 2.The axial movement of the screw rod 1（Injection is acted）Entered by injection with servomotor M1
OK, in addition, the rotation of screw rod 1 is independently carried out by screw rod rotation with servomotor M2 and injection with servomotor M1.
Symbol 31 is with servomotor M1 as driving source screw rod 1 is carried out the power transmission machine of injection action injection
Structure, symbol 32 is with servomotor M2 as driving source screw rod is measured the power transmission machine of action screw rod rotation
Structure.In addition, being set in injection cylinder 2 by heater（hand heater）Deng the heating part of composition（It is not shown）.
In addition, the base upper surface in injection cylinder 2 is configured to the hopper 4 that input turns into the particle of moulding material.In addition,
It is provided for the particle in hopper 4 being supplied to of injection cylinder 2 between the hopper 4 and injection cylinder 2 as particle supply source
Grain loader 5.Communication path 6 that the particle loader 5 is formed by being transverse between hopper 4 and injection cylinder 2 and carrying for being equipped with
The rotor 7 of blade, as the blade-carrying rotor 7 rotary driving part motor M3 and control motor M3 rotation
The motor drive circuit 8 of rotary speed is constituted.Also, by blade-carrying to control according to the quantity delivered command value F of resin
The rotary speed of rotor 7, is adjusted to being admitted to the translational speed of particle of injection cylinder 2 from hopper 4.
Furthermore it is possible to using resin supply with screw rod come the blade-carrying rotor 7 instead of constituting particle loader 5.This
When, particle can be sent into injection cylinder 2 with screw rod with motor M3 rotation driving resin supplies.
In injection with servomotor M1 and screw rod rotation with being respectively mounted rotary encoder P1 on servomotor M2
And P2, detect the current location around the current location and axle center of the axis direction of screw rod 1（Rotation position）Deng.
The control device 100 of injection moulding machine has the microprocessor of Numerical Control（Hereinafter referred to as CNC-CPU）111 Hes
The microprocessor of programmable machine bed controller（PMC-CPU）113.Storage is connected with PMC-CPU113 to be used to control injection
ROM116, the non-volatile PMC of the sequentially-operating of forming machine and the sequential programme of particle loader 5 etc. are with RAM109 and currently
Value storage RAM108.CNC-CPU111 is used for each portion of overall control injection moulding machine, and being connected to locking via servo interface 110 uses
Servomotor（It is not shown）, demoulding servomotor（It is not shown）, screw rod rotation with servomotor, injection with servo electricity
The servo circuit of each axle of the drive controls such as motivation.In addition, illustrate only the servo for injection servomotor M1 in Fig. 1
The servo circuit 101 of circuit 102 and screw rod rotation servomotor M2.
Non-volatile shared RAM104 has the storage of the NC programs of each action of storage control injection moulding machine etc.
Device portion and the setting memory portion for storing various setting values, parameter, macro-variable etc..Also, also deposited in the setting memory portion
Storage sets defeated via manual data entry device 117 and guidance panel controller 115 with LCD display device by operator
Various conditions of molding and measuring condition for entering etc..
Bus arbiter controller bus arbiter controller112（Hereinafter referred to as BAC）With CNC-CPU111 with
And each bus connection of PMC-CPU113, shared RAM104, input circuit 105, output circuit 106, controlled using BAC112
Bus used in system.
Injection servomotor M1 is connected with servo circuit 102, spinning in future encoder P1 detection output input
Into the servo circuit 102, the current of screw rod 1 is detected by the current location storage register in servo interface 110 all the time
Position（Axially）.In addition, screw rod rotation servomotor M2 is connected with servo circuit 101, spinning in future encoder P2's
Detection output is input to the servo circuit 101, so as to carry out position, the control of speed.RAM103 is to be used to store CNC-
The memory of CPU111 operational data.
The output circuit 106 of control device 100 is connected via D/A transformers 9 with motor drive circuit 8.Motor drives
The speed command come self-control device 100 after circuit 8 is moved by being converted according to the D/A transformers 9 is come drive control motor
M3, it is corresponding according to the speed command with carrying out self-control device 100 from there through the blade-carrying rotor 7 of particle loader 5
Feeding speed, injection cylinder 2 is supplied to by the particle in hopper 4.
Structure more than, using CNC stored with the NC programs stored in ROM114, in shared RAM104 it is each
Kind of condition of molding and in PMC with sequential programme stored in ROM116 etc., PMC-CPU113 carries out sequential control, while CNC-
CPU111 is via servo interface 110 to the servo circuit dispense-pulse of each axle of injection moulding machine so that drive control is molded into
Type machine, this puts identical with the drive control of existing injection moulding machine.
That is, in measurement, the process of mixing, as now, CNC-CPU111 is set in advance according in shared RAM104
Fixed back pressure carrys out drive control injection servomotor M1, in addition, receiving the measurement commencing signal from PMC-CPU113
CNC-CPU111 according in shared RAM104 screw rod rotary speed set in advance start via servo interface 110 it is each pre-
The pulse distribution of fixed cycle, the servo for possessing error register or F/V transformers and error amplifier or power amplifier etc.
Circuit 101 according to the dispense-pulse from CNC-CPU111 and the feedback pulse from rotary encoder P2 carry out position, speed,
Each processing of electric current loop, control screw rod rotation is with servomotor M2 so that the rotary speed of screw rod 1 turns into setting speed.
In addition, though diagram is eliminated, but in order in injection molding machine testing screw rod power suffered in the axial direction, in spiral shell
Possess the force detectors such as strain gauge or load cell between bar 1 and screw drive portion.Also, can be with the front part of injection cylinder 2
Possesses the sensor of detection resin pressure.Output signal from these force detectors and pressure sensor is via input circuit
105 are sent to control device 100.
The resin quantity delivered adjustment portion that above-mentioned injection moulding machine possesses performs the processing shown in Fig. 2~Fig. 5 flow chart.
<Screw rod drag evaluation portion>
Screw rod is from the resin of the slush state of screw root by resistance（Screw rod resistance）, but in injection, pressurize etc.
In molding procedure, also from the thawing resin in front of screw rod by the power proportional to resin pressure in addition to screw rod resistance.Should
The power of resin pressure and the density of starvation do not have dependency relation, therefore do not turn into the index of starvation, so needing to disappear
Except the power of the resin pressure only detects screw rod resistance.
Typically in the process of injection molding, after measurement process, enter to exercise screw retreats resin pressure is subtracted
The decompression process of pressure.In addition, in a part of forming method, decompression process is carried out after pressurize process sometimes（Pre- decompression）,
Then process is measured.Depressurize resin pressure after the completion of the decompression process, thus after the completion of decompression process to spiral shell
Bar starts between advance, and screw rod power suffered in the axial direction is probably consistent with screw rod resistance.It therefore, it can be accomplished to from decompression
Any time between screw rod advance detects the absolute value of screw rod power suffered in the axial direction, as screw rod resistance（Reference
Fig. 2 step SA08）.
In addition, any time of the state depressurized from resin pressure（That is, the resin pressure quilt during screw retreats
At the time of decompression）At the time of resin pressure starts increase during advancing to screw rod, screw rod power suffered in the axial direction and screw rod
Resistance is probably consistent.Now, it is conceived in the state that resin pressure is not depressurized by making screw retreats, screw rod is in axial institute
The power received is reduced, even if but make screw retreats when depressurizing resin pressure, screw rod power suffered in the axial direction will not also subtract
Few situation；Even and if screw rod is advanced in the state that resin pressure is depressurized, screw rod power suffered in the axial direction is not yet
It can increase, but when screw rod moves on resin pressure and increased again, the increased situation of screw rod power suffered in the axial direction can
Screw rod exists during advancing with the power suffered in the axial direction nondecreasing moment of the screw rod during screw retreats to screw rod
Any time between at the time of power suffered by axial direction starts to increase, absolute value of the screw rod in the power suffered by axial direction is detected, by it
It is used as screw rod resistance（Step SB04, SB13 of reference picture 3）.
The pressure sensor of detection resin pressure is set in spray nozzle part or injection cylinder front part, according to using the pressure sensor
The resin pressure detected calculates the power of resin pressure, it is then possible to by excluding the calculating from the power suffered by screw rod
The power of the resin pressure gone out calculates screw rod resistance.At this moment, can also be according to the inspection of resin pressure even if resin pressure is not depressurized
Measured value calculates screw rod resistance, therefore can calculate screw rod resistance any at the time of.For example, can be any at the time of, inspection
Survey subtracts the absolute of the value that the detected value of resin pressure and the product in screw sections face are obtained from screw rod power suffered in the axial direction
Value, as screw rod resistance（The step SC05 of reference picture 4）.
Furthermore it is possible to after the power suffered by screw rod is scaled into pressure unit, remove the composition of resin pressure to calculate spiral shell
Bar resistance.For example, can any at the time of, what detection was obtained from screw rod power suffered in the axial direction divided by screw sections area
The absolute value for the value that the detected value of resin pressure is obtained is subtracted in value, as screw rod resistance（The step SD05 of reference picture 5）.
<On decompression process>
Decompression process in, can by making screw retreats depressurize resin pressure, can also by make screw rod to survey
Amount direction in opposite direction rotates to depressurize resin pressure.Even if furthermore it is possible to screw retreats, screw rod will be made in decompression process
At the time of being determined as that resin pressure is depressurized at the power nondecreasing moment suffered by axial direction, even if will can also make in decompression process
Screw rod reverse rotation, screw rod is be determined as that resin pressure is depressurized at the time of at the power nondecreasing moment suffered by axial direction.
<Detect power test section of the screw rod in the power suffered by axial direction>
As detection screw rod the power suffered by axial direction power test section, as described above can screw rod and screw drive portion it
Between possess the power test section such as strain gauge or load cell.Alternatively, it is also possible to be constituted in the servo circuit for axially drive screw rod
Well-known Load Disturbance Observer, to detect the power suffered by screw rod.In addition, when driving movable part with servomotor,
Can be according to the power suffered by the driving current of servomotor detection screw rod.In addition, during with hydraulic-driven screw rod, can be according to liquid
The pressure value of pressure detects the power suffered by screw rod.Furthermore it is possible to detect pressure to replace screw rod in the power suffered by axial direction.
<The initial value of the quantity delivered command value of resin>
The quantity delivered command value F of the resin set when can be by operation start initial value is set to the diameter of screw rod 1 etc.
The corresponding fixed value of specification, can also obtaining products formed volume according to position etc. is measured, there is provided suitable with the volume
Amount of resin.Quantity delivered command value F initial value can be stored in advance in as in the shared RAM104 of nonvolatile memory.
<Calculating on the quantity delivered command value of resin>
On quantity delivered command value F calculating, when the screw rod resistance detected is more than predetermined desired value, starvation
To be close, therefore adjustment quantity delivered command value F makes it diminish, on the other hand, when the screw rod resistance detected is less than predetermined target
During value, starvation is sparse, therefore adjustment quantity delivered command value F makes it become big.According further to the screw rod resistance that detects and
Deviation between predetermined desired value carries out PID control, calculates quantity delivered command value F and causes screw rod resistance and predetermined desired value
Unanimously.
<Setting on the desired value of screw rod resistance>
As described above, causing the screw rod resistance detected to turn into predetermined desired value by control, so as to be controlled
System causes starvation to turn into constant.When forming appropriate starvation, screw rod resistance is almost nil sometimes.It therefore, it can
By zero desired value for being set as screw rod resistance.In addition, during screw rod resistance when being known a priori by being formed appropriate starvation, can
So that the value is set as into desired value.Furthermore it is possible to detect the state of filling（The resin supply mouth of injection cylinder is full of the state of particle）
Screw rod resistance, pre-determined factor will be multiplied by the value（0<Coefficient<1）Value afterwards is set as desired value.
<On resin quantity delivered adjustment portion>
Resin quantity delivered adjustment portion can adjust the resinous wood of every 1 molding cycle according to the quantity delivered command value F calculated
The quantity delivered of material.For example, as described in Unexamined Patent 6-304967 publications, if providing resinous wood using feed worm
The resin material supply unit of material, can control the feed worm rotation amount of every 1 molding cycle.Or, every 1 shaping can also be controlled
The feed worm rotational time in cycle.Or, the confession that resin quantity delivered adjustment portion can be calculated according to molding cycle
The quantity delivered of the resin material of each unit interval is adjusted to command value F.For example, if providing resin using feed worm
The resin material supply unit of material, the rotary speed of feed worm when can control the resin material to supply.At this moment, resin is supplied
Adjustment portion can accordingly be supplied with the predetermined process of molding cycle.For example, can be carved at the beginning of measurement process
Finish time is supplied, and can also be carved into finish time at the beginning of molding cycle and be supplied.Or, confession can be set
To start time and supply finish time so that the service time of 1 molding cycle turns into Time constant.
Fig. 2 be according to since decompression process terminate after to screw rod advance any time screw rod suffered by power（Spiral shell
Bar resistance）Absolute value carry out the flow chart of resin quantity delivered regulation processing.Below, illustrated according to each step.
[step SA01] setting quantity delivered command value F initial value.
[step SA02] performs injection, pressurize process.
[step SA03] starts measurement.
[step SA04] is calculated（Update）The quantity delivered command value F of resin, so that in the step SA08 of preceding molding cycle
The screw rod resistance being detected and stored is equal to pre-determined desired value.
[step SA05] provides resin according to the quantity delivered command value F in the step SA04 resins calculated.
[step SA06] terminates measurement if carried out the measurement of the resin of scheduled volume.
[step SA07] performs decompression process.
The absolute value of power suffered by [step SA08] detection screw rod, is used as screw rod resistance.
[step SA09] judges whether operating terminates, and when operating is not over, return to step SA02 continues the processing,
Terminate the processing at the end of operating.
Fig. 3 is according to suffered by screw rod during the power nondecreasing moment from decompression process suffered by screw rod to screw rod advance
Power at the time of start increase between any time screw rod suffered by power absolute value, carry out the regulation processing of resin quantity delivered
Flow chart.Below, illustrated according to each step.
[step SB01] setting quantity delivered command value F initial value.
[step SB02] performs injection step.
[step SB03] judges whether the power suffered by screw rod increases, in increase（It is）, step SB05 is transferred to, is not being had
During increase（It is no）, it is transferred to step SB04.
The absolute value of power suffered by [step SB04] detection screw rod, is used as screw rod resistance.
[step SB05] completes injection step.
[step SB06] performs pressurize process.
[step SB07] starts to measure process.
[step SB08] is calculated（Update）The quantity delivered command value F of resin so that step SB04 detect or
The screw rod resistance that the step SB13 of preceding molding cycle is detected and stored turns into desired value.
[step SB09] is provided according to the quantity delivered command value F of the resins calculated of the step SB08 in preceding molding cycle
Resin.
[step SB10] completes measurement when carrying out the measurement of resin of scheduled volume.
[step SB11] starts to depressurize process.
[step SB12] judges whether the power suffered by screw rod is reduced, and is not reducing（It is no）When, step SB13 is gone to, is being reduced
When（It is）, wait and be changed into not reducing.
The absolute value of power suffered by [step SB13] detection screw rod, is used as screw rod resistance.
[step SB14] completes decompression.
[step SB15] judges whether operating terminates, and when operating is not over, return to step SB02 is continued with, in fortune
Terminate the processing at the end of turning.
Fig. 4 is the screw rod resistance after the influence produced according to the resin pressure P removed from the power D suffered by screw rod in front of screw rod
Power, carries out the flow chart of the 1st of resin quantity delivered regulation processing.
[step SC01] setting quantity delivered command value F initial value.
[step SC02] performs injection, pressurize process.
[step SC03] starts measurement.
Power D suffered by [step SC04] detection screw rod and resin pressure P in front of screw rod.
The resin pressure P that [step SC05] is subtracted from the power D suffered by screw rod in front of screw rod is multiplied by screw sections area A and obtained
The value arrived（P×A）, it assign the absolute value of the value of resulting result as screw rod resistance F.That is, calculating F=| D-P × A |.
[step SC06] calculates the quantity delivered command value F of resin so that be equal in the step SC05 screw rod resistance F calculated
Pre-determined desired value.
[step SC07] provides resin according to the resin quantity delivered F calculated in step SC06.
[step SC08] judges whether measurement terminates, at the end of measurement（It is）, step SC09 is transferred to, is not had in measurement
At the end of（It is no）, it is transferred to step SC04.
[step SC09] performs decompression process.
[step SC10] judges whether operating terminates, and when operating is not over, return to step SC02 is continued with, in fortune
End is handled at the end of turning.
Fig. 5 is the flow chart of the 2nd that the regulation processing of resin quantity delivered is carried out according to screw rod resistance, the screw rod resistance be from
The influence that resin pressure P is produced in front of screw rod is eliminated in the value that the area of section of all power D of screw rod divided by the screw rod is obtained
Screw rod resistance.
Processing shown in the flow chart of the Fig. 5（Step SD01- steps SD10）With the processing shown in described Fig. 4 flow chart
（Step SC01- steps SC10）It is almost identical, but the step SD05 of Fig. 5 flow chart processing is from the power D suffered by screw rod
Divided by be worth obtained from screw sections area A（D/A）In subtract resin pressure P in front of screw rod, by the value of obtained result
Absolute value is used as screw rod resistance F.That is, calculating F=| D/A-P |, at this point with the step SC05 of Fig. 4 flow chart processing（F=
| D-P × A | calculating）Difference, but the processing of other steps is identical.
Claims (5)
1. a kind of resin supply amount adjustment method of injection moulding machine,
The injection moulding machine have injection cylinder, screw rod, on forward-reverse direction the screw rod forward-reverse drive division of drive screw,
The power test section of the power that is subject in the axial direction of detection screw rod, the resin material supply unit for supplying into the injection cylinder resin material,
The resin supply amount adjustment method is characterised by possessing：
Screw root drag evaluation step, calculate since decompression process terminate after to screw rod advance any time institute
The absolute value of the detected value of power test section is stated, is used as resistance that screw rod is subject to from the resin of the slush state of screw root i.e.
Screw root resistance, the screw root resistance is resin not comprising the starvation with the resin material supply unit of injection moulding machine
The density of material does not have dependency relation, not be subject to from the thawing resin in front of the screw rod and resin of the index as starvation
The power of proportional pressure；
Resin quantity delivered regulating step, as the screw root resistance becomes big, supplies the resin of the resin material supply unit
Diminish to amount.
2. a kind of resin supply amount adjustment method of injection moulding machine,
The injection moulding machine have injection cylinder, screw rod, on forward-reverse direction the screw rod forward-reverse drive division of drive screw,
The power test section of the power that is subject in the axial direction of detection screw rod, the resin material supply unit for supplying into the injection cylinder resin material,
The resin supply amount adjustment method is characterised by possessing：
Screw root drag evaluation step, was calculated from the detected value nondecreasing moment of power test section described in decompression process to spiral shell
The power test section of any time between at the time of the detected value of the power test section starts to increase during bar advances
The absolute value of detected value, is used as the i.e. screw root resistance of resistance that screw rod is subject to from the resin of the slush state of screw root
Power, the screw root resistance is not comprising the density that the starvation with the resin material supply unit of injection moulding machine is resin material
There is no dependency relation, not the index as starvation from the thawing resin in front of screw rod be subject to it is proportional to resin pressure
Power；
Resin quantity delivered regulating step, as the screw root resistance becomes big, supplies the resin of the resin material supply unit
Diminish to amount.
3. the resin supply amount adjustment method of injection moulding machine according to claim 1 or 2, it is characterised in that
Resin pressure detecting step with the resin pressure in front of detection screw rod,
In the screw root drag evaluation step, subtracted from the detected value of the power test section in resin pressure detection
The detected value detected in step is multiplied by the value that screw sections area is obtained, and regard the absolute value of the value calculated as screw root
Resistance.
4. the resin supply amount adjustment method of injection moulding machine according to claim 1 or 2, it is characterised in that
Resin pressure detecting step with the resin pressure in front of detection screw rod,
In the screw root drag evaluation step, obtained from the detected value divided by screw sections area of the power test section
Value subtracts the detected value detected in the resin pressure detecting step, regard the absolute value of the value calculated as screw root
Resistance.
5. the resin supply amount adjustment method of injection moulding machine according to claim 1 or 2, it is characterised in that
In the resin quantity delivered regulating step, the resin quantity delivered of the resin material supply unit is adjusted, so that the spiral shell
Pole-footing portion resistance turns into predetermined desired value.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012166129 | 2012-07-26 | ||
| JP2012-166129 | 2012-07-26 | ||
| JP2013-090401 | 2013-04-23 | ||
| JP2013090401A JP5543632B2 (en) | 2012-07-26 | 2013-04-23 | Injection molding machine having a resin supply amount adjustment unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103568209A CN103568209A (en) | 2014-02-12 |
| CN103568209B true CN103568209B (en) | 2017-08-08 |
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| CN201310316642.8A Active CN103568209B (en) | 2012-07-26 | 2013-07-25 | Injection moulding machine with resin quantity delivered adjustment portion |
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|---|---|
| JP (1) | JP5543632B2 (en) |
| CN (1) | CN103568209B (en) |
| DE (1) | DE102013012067B4 (en) |
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| AT516122B1 (en) * | 2014-08-14 | 2017-01-15 | Engel Austria Gmbh | Method for dosing plastic granules |
| US20180281250A1 (en) * | 2017-03-29 | 2018-10-04 | Maguire Products, Inc. | Dual signal additive feeding method and apparatus |
| KR102067873B1 (en) * | 2017-09-28 | 2020-01-17 | 주식회사 대건테크 | Method for calculating metal powder supply rate of 3d printer |
| DE102017126946A1 (en) | 2017-11-16 | 2019-05-16 | Kraussmaffei Technologies Gmbh | Process for the production of plastic molded parts |
| AT523150B1 (en) | 2019-11-28 | 2021-06-15 | Engel Austria Gmbh | Method for influencing a backlog length and / or a screw return speed |
| CN113799350B (en) * | 2021-08-23 | 2023-07-21 | 西诺控股集团有限公司 | Control method and device for intelligently detecting plasticizing capacity |
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|---|---|---|---|---|
| JPH07164492A (en) * | 1993-12-17 | 1995-06-27 | Toshiba Mach Co Ltd | Method for controlling screw back pressure of electric injection molding machine |
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| JPS5311957A (en) * | 1976-07-20 | 1978-02-02 | Meiki Seisakusho Kk | Plastic molding machine |
| JPH01171830A (en) * | 1987-12-28 | 1989-07-06 | Japan Steel Works Ltd:The | Material feed control method for injection machine and its device |
| JP2558891B2 (en) * | 1989-09-29 | 1996-11-27 | 三菱重工業株式会社 | Raw material resin feeder for molding machine |
| JP2529412B2 (en) * | 1989-10-02 | 1996-08-28 | 東洋機械金属株式会社 | Injection molding machine |
| JPH0518531A (en) | 1991-07-08 | 1993-01-26 | Matsushita Electric Ind Co Ltd | Control device for electromagnetic pump |
| JP2694587B2 (en) * | 1992-05-19 | 1997-12-24 | ファナック株式会社 | Measuring method of injection molding machine |
| JPH06304967A (en) | 1993-04-26 | 1994-11-01 | Fanuc Ltd | Fixed quantity weighing equipment for injection molding machine |
| JP3751506B2 (en) * | 2000-06-08 | 2006-03-01 | ヤマハファインテック株式会社 | Material metering and supply control device for injection molding machine and material metering and control method thereof |
| JP3905319B2 (en) * | 2001-02-26 | 2007-04-18 | 住友重機械工業株式会社 | Injection control device |
| JP3515530B2 (en) * | 2001-02-27 | 2004-04-05 | 住友重機械工業株式会社 | Injection control device and injection control method |
| DE102007012199A1 (en) * | 2007-03-14 | 2008-09-18 | Demag Ergotech Gmbh | Plastification mechanism e.g. extruder or injection molding machine, operating method, involves adjusting and/or maintaining fluid level of raw material in valve within fluid level range corresponding to optimal operating parameter range |
| JP4945662B2 (en) * | 2010-06-21 | 2012-06-06 | ファナック株式会社 | Injection molding machine having resin supply amount adjusting means |
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- 2013-04-23 JP JP2013090401A patent/JP5543632B2/en active Active
- 2013-07-19 DE DE102013012067.5A patent/DE102013012067B4/en active Active
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07164492A (en) * | 1993-12-17 | 1995-06-27 | Toshiba Mach Co Ltd | Method for controlling screw back pressure of electric injection molding machine |
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| Publication number | Publication date |
|---|---|
| JP5543632B2 (en) | 2014-07-09 |
| CN103568209A (en) | 2014-02-12 |
| JP2014040090A (en) | 2014-03-06 |
| DE102013012067B4 (en) | 2021-06-24 |
| DE102013012067A1 (en) | 2014-01-30 |
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