CN104535309A - Test method for response time of injection molding screw non-return ring - Google Patents

Test method for response time of injection molding screw non-return ring Download PDF

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Publication number
CN104535309A
CN104535309A CN201410781073.9A CN201410781073A CN104535309A CN 104535309 A CN104535309 A CN 104535309A CN 201410781073 A CN201410781073 A CN 201410781073A CN 104535309 A CN104535309 A CN 104535309A
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CN
China
Prior art keywords
response time
check ring
injection
melt
melt pressure
Prior art date
Application number
CN201410781073.9A
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Chinese (zh)
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CN104535309B (en
Inventor
张龙启
韩雪峰
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海天塑机集团有限公司
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Priority to CN201410781073.9A priority Critical patent/CN104535309B/en
Publication of CN104535309A publication Critical patent/CN104535309A/en
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Publication of CN104535309B publication Critical patent/CN104535309B/en

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Abstract

A test method for the response time of an injection molding screw non-return ring includes the steps that a melt pressure sensor is installed at a spraying nozzle, and the pressure value detected by the sensor is collected in real time; in the injection state, when the spraying nozzle is closed, and the time difference between the minimum point and the maximum point of melt pressure is collected and is the response time of the non-return ring. The test method for the response time of the injection molding screw non-return ring has the advantages that the response time of the injection molding screw non-return ring is tested easily and conveniently, and measured data are accurate.

Description

The method of testing of injection screw check ring response time
Technical field
The present invention relates to the method for testing of a kind of injection screw check ring response time.
Background technology
The check ring response time: refer in injection process, check ring is from open mode to the time closed.Check ring in the function of plasticized melt injection stage is: close at injection stage, check ring end face contacts with thrust ring, makes screw head form airtight space, blocks return flow line, stop the backflow of plastifying fusion thing, the plasticized melt pressure being in screw head front end is kept.
The injection machine check ring response time is the embodiment of reacting check ring sensitivity; On same screw rod, install different check rings, under the same operating conditions, the check ring response time is shorter simultaneously, show that the accuracy of measuring is higher, otherwise the accuracy of then measuring is lower.Equally, same check ring is supporting to be arranged on different screw rods, and under the same operating conditions, the check ring response time is shorter, then show that the material melt viscosity through this spiro rod plasticizing is lower, otherwise then the plasticized melt viscosity of screw rod is higher.
The scheme that the check ring response time assay method of existing injection screw extensively adopts is as shown in Figure 1: when injection machine normal running conditions hemostasis goods, by at nozzle place and the injecting cavity place setting pressure sensor at injection cylinder, mistiming Δ T when adopting injection oil pressure to reach maximal value and when nozzle pressure reaches maximal value, represents the response time of check ring.The method can record the response time of check ring indirectly, but the response delay caused because fluid is different with the compressibility of melt and delayed, the check ring response time of the method computation and measurement is actual relatively large deviation, causes certain mistaken ideas to follow-up to the analysis of check ring sensitivity and the evaluation of screw performance.
In sum, existing method of testing can record the response time of check ring indirectly, but degree of accuracy is very low, causes certain puzzlement and mistaken ideas to follow-up correlation analysis research.
Summary of the invention
Technical matters to be solved by this invention is the method for testing proposing a kind of injection screw check ring response time for above-mentioned prior art present situation, and it effectively can overcome the lower defect of existing method of testing precision.
The present invention solves the problems of the technologies described above adopted technical scheme: the method for testing of injection screw check ring response time, comprise: at nozzle place, melt force sensor is installed, and the force value that Real-time Collection sensor detects, in inject state, when making nozzle be in closed condition, gather melt pressure from minimum to mistiming of 2 during maximal value, this mistiming is the response time of check ring.
Said method specific implementation process is as follows: melt force sensor is installed on nozzle place, and is connected with data acquisition system (DAS) by data line and pressure unit transmission, finally makes data acquisition system (DAS) be connected with controller; Debugging injection machine is in normal duty, open the supporting program of acquisition system in controller and set frequency acquisition, then test is started under the prerequisite normally worked at each equipment, the curve between melt pressure and test duration is obtained by Real-time Collection melt pressure, complete the collection to the check ring response time, by in controller calculating melt pressure curve, melt pressure is from the initial time difference when check ring is closed completely of injection, and this time difference is the response time of check ring.
Compared with prior art, the invention has the advantages that: the test of injection screw check ring response time is easy, measurement data is accurate.
Accompanying drawing explanation
The method of testing schematic diagram of Fig. 1 existing injection screw check ring response time.
The proving installation schematic diagram of Fig. 2 injection screw check ring response time method of testing of the present invention.
The operating diagram of Fig. 3 injection screw check ring response time method of testing of the present invention.
Embodiment
Below in conjunction with accompanying drawing embodiment, the invention will be further described.
As shown in Figure 2, the proving installation of the check ring response time of injection screw comprises lockable and with pressure transducer mounting hole nozzle 1, melt force sensor 2, data cable 3, pressure unit 4, dynamic data collection system 5, PC computer 6.
As shown in Figure 2, melt force sensor 2 is installed on nozzle place, and is transmitted by data cable 3 and pressure unit 4 and be connected with dynamic data collection system 5, finally by USB interface, acquisition system has been connected with PC computer 6.Debugging injection machine is in normal duty, opens the supporting program of acquisition system in PC computer and sets frequency acquisition, starts test under the prerequisite then normally worked at each equipment.
First injection screw storing is made to complete, then nozzle 1 locking is made, and action of injection is completed under injection machine is in manual mode, the curve between melt pressure and test duration is obtained by Real-time Collection melt pressure, complete the collection to the check ring response time, calculate the time difference Δ t at (high pressure place) when (low-pressure) to check ring is closed completely when melt pressure is initial from injection in melt pressure curve, from curve, be exactly that nozzle pressure curve is from injection starting point to the time of peak, by catching injection starting point and peak coordinate on curve, calculate the X-axis mistiming, this mistiming is exactly the check ring response time, come as shown in Figure 3.

Claims (2)

1. the method for testing of injection screw check ring response time, it is characterized in that: comprising: at nozzle place, melt force sensor is installed, and the force value that Real-time Collection sensor detects, in inject state, when making nozzle be in closed condition, gather melt pressure from minimum to mistiming of 2 during maximal value, this mistiming is the response time of check ring.
2. the method for testing of injection screw check ring response time as claimed in claim 1, it is characterized in that: melt force sensor is installed on nozzle place, and be connected with data acquisition system (DAS) by data line and pressure unit transmission, finally make data acquisition system (DAS) be connected with controller; Debugging injection machine is in normal duty, open the supporting program of acquisition system in controller and set frequency acquisition, then test is started under the prerequisite normally worked at each equipment, the curve between melt pressure and test duration is obtained by Real-time Collection melt pressure, complete the collection to the check ring response time, by in controller calculating melt pressure curve, melt pressure is from the initial time difference when check ring is closed completely of injection, and this time difference is the response time of check ring.
CN201410781073.9A 2014-12-17 2014-12-17 The method of testing of injection screw check ring response time CN104535309B (en)

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Application Number Priority Date Filing Date Title
CN201410781073.9A CN104535309B (en) 2014-12-17 2014-12-17 The method of testing of injection screw check ring response time

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410781073.9A CN104535309B (en) 2014-12-17 2014-12-17 The method of testing of injection screw check ring response time

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CN104535309A true CN104535309A (en) 2015-04-22
CN104535309B CN104535309B (en) 2017-07-11

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105599253A (en) * 2015-12-30 2016-05-25 歌尔声学股份有限公司 Sealability detection method for screw non-return ring of injection molding machine

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04201225A (en) * 1990-11-29 1992-07-22 Niigata Eng Co Ltd Method of controlling stroke of screw in injection molding machine
WO2003106136A1 (en) * 2002-06-14 2003-12-24 Netstal-Maschinen Ag Method for injection-molding weight-accurate parts and corresponding injection molding machine
JP2004188798A (en) * 2002-12-11 2004-07-08 Niigata Machine Techno Co Ltd Metering method for injection molding machine
CN1539618A (en) * 2003-11-03 2004-10-27 北京诚信昌科贸公司 Full electronic servo control system in use for plastic-injection moulding machine
CN101028740A (en) * 2007-04-12 2007-09-05 华南理工大学 Injection-machine parameter setting method with automatically-resetting graded injection speed and position
CN101204844A (en) * 2006-12-20 2008-06-25 发那科株式会社 Injection molding machine
JP2008230164A (en) * 2007-03-23 2008-10-02 Fanuc Ltd Setting method of suck back amount and injection molding machine
CN102069577A (en) * 2010-11-25 2011-05-25 宁波弘讯科技有限公司 Precision plastic injection system and control method thereof

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04201225A (en) * 1990-11-29 1992-07-22 Niigata Eng Co Ltd Method of controlling stroke of screw in injection molding machine
WO2003106136A1 (en) * 2002-06-14 2003-12-24 Netstal-Maschinen Ag Method for injection-molding weight-accurate parts and corresponding injection molding machine
JP2004188798A (en) * 2002-12-11 2004-07-08 Niigata Machine Techno Co Ltd Metering method for injection molding machine
CN1539618A (en) * 2003-11-03 2004-10-27 北京诚信昌科贸公司 Full electronic servo control system in use for plastic-injection moulding machine
CN101204844A (en) * 2006-12-20 2008-06-25 发那科株式会社 Injection molding machine
JP2008230164A (en) * 2007-03-23 2008-10-02 Fanuc Ltd Setting method of suck back amount and injection molding machine
CN101028740A (en) * 2007-04-12 2007-09-05 华南理工大学 Injection-machine parameter setting method with automatically-resetting graded injection speed and position
CN102069577A (en) * 2010-11-25 2011-05-25 宁波弘讯科技有限公司 Precision plastic injection system and control method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105599253A (en) * 2015-12-30 2016-05-25 歌尔声学股份有限公司 Sealability detection method for screw non-return ring of injection molding machine
CN105599253B (en) * 2015-12-30 2019-02-19 歌尔股份有限公司 A kind of method for conducting leak test of screw in injection molding machine check ring

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