CN1555973A - Control method for improving quality of extrusion injection shaping product - Google Patents
Control method for improving quality of extrusion injection shaping product Download PDFInfo
- Publication number
- CN1555973A CN1555973A CNA200310122027XA CN200310122027A CN1555973A CN 1555973 A CN1555973 A CN 1555973A CN A200310122027X A CNA200310122027X A CN A200310122027XA CN 200310122027 A CN200310122027 A CN 200310122027A CN 1555973 A CN1555973 A CN 1555973A
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- China
- Prior art keywords
- injection
- melt
- plunger
- lding
- head
- 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
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/53—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston
- B29C45/54—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston and plasticising screw
- B29C45/542—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston and plasticising screw using an accumulator between plasticising and injection unit, e.g. for a continuously operating plasticising 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
- 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
-
- 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
- B29C2945/76006—Pressure
-
- 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
- B29C2945/7619—Injection unit barrel
- B29C2945/76193—Injection unit barrel barrel-chamber
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76595—Velocity
- B29C2945/76598—Velocity linear movement
-
- 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
- B29C2945/76678—Injection unit injection piston
-
- 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
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/53—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston
- B29C45/54—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston and plasticising screw
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
A control method for improving the quality of the product made by extruding-injection mulding includes measuring the pressure of fused material in the extruding head of extruder, comparing it with a predefined value, and regulating the plug moving speed in injector and controlling the pressure of fused material in extruder.
Description
Technical field
The invention belongs to macromolecular material processing and forming and equipment thereof and control field, relate to a kind of raising compounding to extrude-control method of injection molded article quality.
Background technology
Extrude-injection moulding is based on traditional injection molding technique, and closing the compounding expressing technique is the novel processing technology in a step.Use this technology and can make the product that to make with traditional injection moulding, or be difficult to the product of manufacturing.In addition,, saved the intermediate link in many conventional machining process, reduced production cost because material is extruded, injection moulding one goes on foot and forms.
The work of can not turning round continuously of compounding extruder on the extruding of initial stage-injection (mo(u)lding) machine, application is restricted.European patent EP 1280648, U.S. Pat 2003038406 disclose a kind of mechanical device that can be used for addressing the above problem.The plasticizing extruder of this device and melting charge hold-up tank concentric in-line are arranged, in process of production, plasticizing extruder continuously operates, consequent melting charge enters the hold-up tank of plasticizing extruder front end through a unlimited switch valve, when reaching predefined injection volume, this switch valve cuts out, whole plasticizing extruder is moved forward by hydraulic oil cylinder driving, relies on the conducting element of plasticizing extruder inner screw front end that the melting charge in the hold-up tank is injected in the mould cavity through the switch valve that opens wide on nozzle.There are two big defectives in this mode that addresses the above problem and device: 1) action that is injected into mould cavity of the melting charge in this device will lean on the fast preceding in-migration of whole plasticizing extruder to finish, and its energy consumption is big, and control accuracy is low; 2) switch valve that is arranged on the plasticizing extruder screw front end in this device must cut out with pressure maintaining period in the melting charge injection, and plasticizing extruder is meanwhile constantly operating and constantly producing new melting charge, and can produce unexpected melt pressure and increase this moment.So loop cycle can produce bad injection molded article.
World patent WO03041940 discloses a kind of compounding injection (mo(u)lding) machine, can be used for the goods of the system of injection moulding tool different performance material.This patent has been described its hold-up tank and has been arranged on the barrel of the first end of plasticizing extruder inner screw melt zone, when the plunger advancement of the melt that the extruder continuous operation produces in the injection device that arrange the extruder bottom injected, enters hold-up tank.Melt when moving behind plunger in the hold-up tank and is continued melt extruded to screw front end with other material in extruder barrel, enter injection device again.Yet melt zone and other material that all will be pushed screw rod/barrel by the material in the what hold-up tank in each injection moulding cycle are once more met, motion forward again, therefore produce uprushing and whole barrel internal pressure distribution sudden change of melt zone material, produce the unsettled melt extrusion of quality during meeting.During but product molding that molding cycle short big at injection volume, also phenomenon under feeding may appear.
In addition, above-mentioned patent does not relate to the control method of the equipment of describing.
U.S. Pat 2003075821, German patent DE 1052244 is in order to solve the bigger problem of melt pressure fluctuation, this patent disclosure a kind of method, promptly increased by a covering device: melt pressure in the measuring tube on the tube connector between extruder and injection device, measured value and ideal value are made comparisons, by regulating the melt capacity in hold-up tank or the injection device, control the stability of melt pressure.
Summary of the invention
The present invention relates to a kind of more accurate control compounding extrude-injection (mo(u)lding) machine in the method for melt melt pressure stability in the extruder.The method that relates to be by directly extruding-measure melt pressure in real time in the cross-head of injection (mo(u)lding) machine, measured melt pressure value compares with predetermined value at any time, its difference is admitted the parameter that moves past the shift value in the journey in speed or the device behind the plunger as regulating the melt of storing in (or hold and send) device or the injection device, The whole control system constantly makes this difference towards zero development, to guarantee fusion pressure pressure stability in the extruder operation process machine.
Controlling organization involved in the present invention is that equipment melt melt holds and send extruding-injection (mo(u)lding) machine of device, that is: comprise a kind of extruder that can make melt continuously, there is one can move forward and backward and at least one with the injection device of the plunger of melt injection moulding dies cavity, one is contained in and can intermittently admits on the cross-head or the melt of dispatch melt extrusion holds and send device, the jockey that a kind of melting charge that extruder is produced imports the plunger type injection device and the two front end is connected, one is installed in the pressure sensor that can measure and export melt pressure value in the head on the cross-head, a kind of controller that can receive the pressure sensor output signal, the drive unit that send plunger motion in device and/or the injection device is held in driving, and a kind of melt holds and send plunger Stroke Displacement Transducer in the device.
Another kind of controlling organization involved in the present invention is extruding-injection (mo(u)lding) machine of a plurality of injection devices of equipment, that is: comprise a kind of extruder that can make melt continuously, at least two respectively contain one and can move forward and backward and with the injection device of the plunger of melt injection moulding dies cavity, the jockey that a kind of melting charge that extruder is produced imports the plunger type injection device and the two front end is connected, one is installed in the pressure sensor that can measure and export melt pressure value in the head on the cross-head, a kind of controller that can receive the pressure sensor output signal, drive the drive unit of plunger motion in the injection device, plunger movement travel displacement transducer in a kind of injection device.
Extruder involved in the present invention can be an any kind.
Description of drawings
Fig. 1 is that expression controlling organization involved in the present invention is that equipment melt melt holds the control schematic diagram that send the extruding of device-injection (mo(u)lding) machine.
Fig. 2 is that expression controlling organization involved in the present invention is the control schematic diagram of equipment the extruding of a plurality of injection devices-injection (mo(u)lding) machine.
The specific embodiment
To what control embodiment involved in the present invention, be described in detail as follows with reference to accompanying drawing:
With reference to Fig. 1:
Under the rotation of the screw rod that drive unit (not shown) drives drives, material is that head (30) moves towards screw tip constantly, experience is transferred, mix, the plastifying fusion process, enter the space (14) of injection device (2) by the unlimited connection mozzle (12) of switch valve (13) through the melting charge of complete plastifying fusion, and promote to move behind the plunger (15), melting charge amount until space (14) reaches the required injection of goods (and pressurize) amount, switch valve (16) opens wide simultaneously, switch valve (13) cuts out, by driving cylinder (21,22) actuation plunger (15) is injected into the mould of matched moulds (25) die cavity with the melting charge of lining, space (14), curing molding after pressurize cooling again, clamping apparatus is opened and to be ejected goods subsequently, matched moulds and repeat identical mechanical action together again with injection device, and extruder is continuous operation then.
At switch valve (13) when closing, melt hold send device (10) plunger (11) at driving cylinder ((23,24) under the effect, move on gradually according to the melt pressure that sets, the melting charge of admitting the plasticized screw extruder constantly to make stops when capacity reaches the predetermined set amount, and leans on plunger (11) at driving cylinder (23 when switch valve (13) opens wide, 24) under the effect melt held the melting charge that send in the device (10) to the whole emptyings of mozzle (12) direction, import injection device.
In whole operation, the pressure sensor (36) that is contained on the head (30) is constantly measured the interior melt pressure of head (30) and the pressure signal value is passed to controller (40) by holding wire (37), controller (40) constantly compares measured force value and predefined melt pressure value, and according to its difference situation, by holding wire (42) and control valve (52) control driving cylinder (21,22) actuation plunger (15) is injected into the mould of matched moulds (25) die cavity with the melting charge of lining, space (14), and hold when giving device (10) or injection device (2) to admit melting charge at melt, controller (40) is by holding wire (41) and control valve (51), or (52) actuation plunger (11) or (15) after move past positional value in the journey after moving speed or pilot plunger, regulate the interior melt pressure of head (30), the melt pressure value and the predetermined value that newly record are compared, and control to adjust again according to its difference situation.Circulation so repeatedly forces interior the melt pressure of head (30) to approach or waits the predetermined melt pressure value of what, thereby guarantees that the interior melt pressure of extruder is stablized in the operation.In the process, Stroke Displacement Transducer (not shown) participates in the predetermined stroke terminal point of control plunger (11,15).
With reference to Fig. 2:
Under the rotation of the screw rod that drive unit (not shown) drives drives, material is that head (30) moves towards screw tip constantly, experience is transferred, mix, the plastifying fusion process, through the melting charge of complete plastifying fusion by diaphragm valve (13) to connection mozzle (12) (A) to the space that enters injection device (2) (14), and promote to move behind the plunger (15), melting charge amount until space (14) reaches the required injection of goods (and pressurize) amount, switch valve this moment (16) opens wide, diaphragm valve (13) spacious to connect mozzle (12) (B) to, at oil pressure pipe (43,44) under the pressure differential effect, actuation plunger (15) is injected into the mould of matched moulds (not shown) die cavity with the melting charge of lining, space (14), curing molding after pressurize cooling again, clamping apparatus is opened and is ejected goods subsequently, matched moulds and repeat identical mechanical action together with injection device again, extruder is continuous operation then.
Switching valve (13) spacious to connect mozzle (12) (B) to the time, the plunger (65) of injection device (62) is at oil pressure pipe (38,39) under the pressure differential effect, move after gradually according to the melt pressure that sets, the melting charge of admitting extruder constantly to make, when capacity reaches the predetermined set amount, stop, and diaphragm valve (13) spacious to connect mozzle (12) (A) to the time, to the melting charge of the mould of matched moulds (not shown) die cavity injection.
In whole operation, the pressure sensor (36) that is contained on the head (30) is constantly measured the interior melt pressure of head (30) and the pressure signal value is passed to controller (40) by holding wire (37), controller (40) constantly compares measured force value and predefined melt pressure value, and according to its difference situation, by holding wire (42), control valve (52) and oil pressure pipe (43,44) control actuation plunger (15) is injected into the mould of matched moulds (not shown) die cavity with the melting charge of lining, space (14), and when injection device (62) or injection device (2) admittance melting charge, controller (40) is by holding wire (41,42) and control valve (51), or (52) actuation plunger (65) or (15) after move past positional value in the journey after moving speed or pilot plunger, regulate the interior melt pressure of head (30), the melt pressure value and the predetermined value that newly record are compared, and control to adjust again according to its difference situation.Circulation so repeatedly forces interior the melt pressure of head (30) to approach or waits the predetermined melt pressure value of what, thereby guarantees that the interior melt pressure of extruder is stablized in the operation.In the process, the Stroke Displacement Transducer (not shown) of injection piston (65) or (15) participates in the predetermined stroke terminal point of control plunger (65,15).
Claims (8)
- A control compounding extrude-cross-head of injection (mo(u)lding) machine in the method for melt pressure, related step comprises: measure melt pressure in the cross-head, with scheduled pressure value this measured value relatively, provide control signal according to its difference, regulate melt hold send the speed of moving after device or the injection device inner plunger or after move past positional value in the journey, obtain stable melt pressure.
- 2. as claimed in claim 1 extruding-injection (mo(u)lding) machine is characterized in that: but its clamping apparatus possesses the template of at least two installation forming moulds, is all-hydraulic latching mode or hydraulic drive toggle clamping mechanism or electronic driven type.
- 3. as claimed in claim 1 extruding-injection (mo(u)lding) machine, it is characterized in that: it comprises a kind of extruder that can make melt continuously, there is one can move forward and backward and at least one with the injection device of the plunger of melt injection moulding dies cavity, one is contained in and can intermittently admits on the cross-head or the melt of dispatch melt extrusion holds and send device, the jockey that a kind of melting charge that extruder is produced imports the plunger type injection device and the two front end is connected, one is installed in the pressure sensor of measuring and export melt pressure value in the head on the cross-head, a kind of controller that can receive the pressure sensor output signal, the drive unit that send plunger motion in device and/or the injection device is held in driving, and a kind of melt holds and send plunger Stroke Displacement Transducer in the device.
- 4. as claimed in claim 1 extruding-injection (mo(u)lding) machine is characterized in that: it is variable displacement or quantitative by motor-driven oil pump.
- 5. as claimed in claim 1 extruding-injection (mo(u)lding) machine, it is characterized in that: it comprises a kind of extruder that can make melt continuously, at least two respectively contain one and can move forward and backward and with the injection device of the plunger of melt injection moulding dies cavity, the jockey that a kind of melting charge that extruder is produced imports the plunger type injection device and the two front end is connected, one is installed in the pressure sensor that can measure and export melt pressure value in the head on the cross-head, a kind of controller that can receive the pressure sensor output signal, drive the drive unit of plunger motion in the injection device, plunger movement travel displacement transducer in a kind of injection device.
- 6. as claimed in claim 1 extruding-injection (mo(u)lding) machine is characterized in that: the injection piston in its plunger type injection device moves forward and backward by hydraulic-driven.
- 7. as claimed in claim 1 extruding-injection (mo(u)lding) machine is characterized in that: its melt holds the plunger that send in the device and moves forward and backward by hydraulic-driven.
- 8. as claimed in claim 1 extruding-injection (mo(u)lding) machine is characterized in that: the mozzle in its jockey be equipped with a kind of when unlimited melting charge pass through the intransitable switch valve of melting charge when closing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200310122027XA CN1307036C (en) | 2003-12-31 | 2003-12-31 | Control method for improving quality of extrusion injection shaping product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200310122027XA CN1307036C (en) | 2003-12-31 | 2003-12-31 | Control method for improving quality of extrusion injection shaping product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1555973A true CN1555973A (en) | 2004-12-22 |
| CN1307036C CN1307036C (en) | 2007-03-28 |
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ID=34338605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200310122027XA Expired - Fee Related CN1307036C (en) | 2003-12-31 | 2003-12-31 | Control method for improving quality of extrusion injection shaping product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1307036C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104690942A (en) * | 2015-03-11 | 2015-06-10 | 江苏大道机电科技有限公司 | System for synchronous storage and injection of multiple storage cylinders in plastic hollow molding machine |
| CN104526975B (en) * | 2010-11-23 | 2016-11-02 | 圣万提注塑工业有限公司 | The apparatus and method of injection moulding flow-control |
| CN106239852A (en) * | 2016-08-30 | 2016-12-21 | 徐胜 | Flexible injection center |
| CN107953526A (en) * | 2017-11-29 | 2018-04-24 | 华南理工大学 | A kind of full-automatic online sample preparation device on extruding production line |
| CN114714555A (en) * | 2022-06-08 | 2022-07-08 | 安能绿色建筑科技有限公司 | Production process of foamed composite heat-insulation board with vacuum heat-insulation plate |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1035472C (en) * | 1992-02-27 | 1997-07-23 | 清华大学 | Production line for extruding pipe and wire materials |
| CN1305658C (en) * | 2001-05-30 | 2007-03-21 | 罗姆两合公司 | Method and device for regulating pressure in a single-screw degassing extruder or in a cascade extruder |
-
2003
- 2003-12-31 CN CNB200310122027XA patent/CN1307036C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104526975B (en) * | 2010-11-23 | 2016-11-02 | 圣万提注塑工业有限公司 | The apparatus and method of injection moulding flow-control |
| CN104690942A (en) * | 2015-03-11 | 2015-06-10 | 江苏大道机电科技有限公司 | System for synchronous storage and injection of multiple storage cylinders in plastic hollow molding machine |
| CN106239852A (en) * | 2016-08-30 | 2016-12-21 | 徐胜 | Flexible injection center |
| CN107953526A (en) * | 2017-11-29 | 2018-04-24 | 华南理工大学 | A kind of full-automatic online sample preparation device on extruding production line |
| CN114714555A (en) * | 2022-06-08 | 2022-07-08 | 安能绿色建筑科技有限公司 | Production process of foamed composite heat-insulation board with vacuum heat-insulation plate |
| CN114714555B (en) * | 2022-06-08 | 2022-08-12 | 安能绿色建筑科技有限公司 | Production process of foamed composite heat-insulation board with vacuum heat-insulation plate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1307036C (en) | 2007-03-28 |
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