CN101712197B - Visual polymer micro-extrusion mold - Google Patents

Visual polymer micro-extrusion mold Download PDF

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Publication number
CN101712197B
CN101712197B CN2009103092663A CN200910309266A CN101712197B CN 101712197 B CN101712197 B CN 101712197B CN 2009103092663 A CN2009103092663 A CN 2009103092663A CN 200910309266 A CN200910309266 A CN 200910309266A CN 101712197 B CN101712197 B CN 101712197B
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CN
China
Prior art keywords
visual
mold
neck ring
temperature sensor
extrusion
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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.)
Expired - Fee Related
Application number
CN2009103092663A
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Chinese (zh)
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CN101712197A (en
Inventor
赵丹阳
金翼飞
王敏杰
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Dalian University of Technology
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Dalian University of Technology
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Priority to CN2009103092663A priority Critical patent/CN101712197B/en
Publication of CN101712197A publication Critical patent/CN101712197A/en
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Publication of CN101712197B publication Critical patent/CN101712197B/en
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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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92019—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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92209—Temperature
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92323—Location or phase of measurement
    • B29C2948/92361—Extrusion unit
    • B29C2948/92409—Die; Nozzle zone
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92514—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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92704—Temperature
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92904—Die; Nozzle zone

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

The invention discloses a visual polymer micro-extrusion mold and belongs to the technical field of polymer micro-extrusion molds. The visual polymer micro-extrusion mold is characterized in that the visual mold consists of a connecting pipe, a heating ring, a handpiece body, an adjusting bolt, a positioning pin, a baffle, a fastening bolt, a visual neck ring mold, a pressure/temperature sensor, a core rod, a gasket, a temperature sensor, a ventilating bolt, a support plate, a spure spreader and a flange. The spure spreader, the core rod and the neck ring mold with different structural parameters are respectively exchanged according to the need; coaxiality and clearance between the core rod and the visual neck ring mold are adjusted by the method of fixing the visual neck ring mold and adjusting the core rod; the visual neck ring mold is used for observing the flow state in the micro-extrusion mold of polymer melt; the pressure/temperature sensor is used for measuring pressure and temperature of straight section of the polymer melt; and the heating ring and the temperature sensor are used for controlling temperature of the micro-extrusion mold. The visual polymer micro-extrusion mold obtains flow distribution, flow characteristics and wall slip velocity of the polymer melt in the flow channel by the visual neck ring mold.

Description

A kind of visual polymer micro-extrusion mold
Technical field
The invention belongs to the polymer micro-extrusion mold technical field, relate to a kind of Flow Field Distribution of polymer melt in small runner and visual micro-extrusion mold of wall slippage speed observed.
Background technology
The flow process of polymer melt in the small runner of extrusion die is the emphasis problem of mould design and polymer rheology research always.Traditional research method can only be by the input and output parameter, infer the flow process of polymer melt in small runner as temperature, viscosity, pressure etc., polymer real flow behavior in runner can not directly be described, limited to the directive function of actual micro-extrusion mold structural design.
Micro-extrusion mold is the key equipment of the whole little extrusion molding process of plastic melt.During micro-extrusion mold design at present, because the polymeric rheology theory is still imperfect under the minute yardstick effect, the flow behavior of polymer melt in the micro-extrusion mold runner can't be described exactly, so that the design of micro-extrusion mold depends on " trial-and-error method " to a great extent.This method need constantly be carried out die trial, be repaired a die, and takes time and effort, and designing quality is not high yet simultaneously.According to statistics, die trial, the time that repairs a die account for that micro-extrusion mold is whole to manufacture and design 30%～40% of the cycle, have caused die cost significantly to increase like this, have had influence on further developing of micro-extrusion mold.The mould visualization technique is to open in the mould one of effective technical means of this black box of melt flows state.At present, the mould visualization technique has become the focus of domestic and international mould applications research, mainly concentrate on injection mold visualization technique aspect, and obtained significant progress, and do not appear in the newspapers both at home and abroad for the research of polymer micro-extrusion mold visualization technique aspect.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of visual polymer micro-extrusion mold, be used for directly observing the Flow Field Distribution and the wall slippage speed of the little extrusion of polymer melt, the result of observation can improve the polymer rheology theory, directly instructs the design of polymer micro-extrusion mold.
Technical scheme of the present invention is:
A kind of visual polymer micro-extrusion mold mainly is made up of tube connector, heating collar, handpiece body, adjustment bolt, alignment pin, baffle plate, fastening bolt, visual neck ring mold, pressure, plug, packing ring, temperature sensor, ventilation bolt, gripper shoe, branch flow cone and flange.Handpiece body links to each other with outlet of extruder with flange by tube connector, divide flow cone and plug to be separately fixed at the gripper shoe both sides, adjusting bolt contacts with gripper shoe by the bolt hole on the handpiece body with the ventilation bolt, utilize packing ring, baffle plate and fastening bolt that visual neck ring mold is fixed on the handpiece body, temperature sensor and heating collar are fixed on the outside of tube connector, handpiece body and visual neck ring mold, and pressure is installed in mouthful aperture of mould flat segments.
This mould can be changed branch flow cone, plug and mouthful mould of different structure parameter according to the needs of research.
The polymer melt of fusion enters mold runner by tube connector under the effect of pressure, enter in the runner under the effect of minute flow cone, through the compression of compression section, is extruded by flat segments at last.The heating collar and the temperature sensor control polymer melt that are installed on the mould keep stationary temperature in extrusion; By regulating axiality and the gap of adjusting between bolt change plug and mouthful mould, make that the Flow Field Distribution of polymer melt extrusion is more even; The visual neck ring mold of quartz glass material is used for taking the flow process of polymer melt in mouth mould inside; The pressure sensor that is installed in flat segments also has the function of measuring temperature simultaneously, is a Pressure/Temperature integrated-type sensor, has the computer communication interface, is used for measuring the pressure and temperature of polymer melt at extrusion.
Effect of the present invention and benefit are: obtain the true flow regime of polymer melt in the small runner of micro-extrusion mold by visual mould, the Flow Field Distribution and the wall slippage speed of observation polymer, thus polymer rheology research and micro-extrusion mold design theory improved; According to branch flow cone, plug and mouthful mould of research needs replacing different structure parameter, can study of the influence of different mold cavity structure parameters to polymer Flow Field Distribution and wall slippage speed; By adopting the fixedly method of visual neck ring mold, adjustment plug, can avoid directly adjusting the broken easily drawback of visual neck ring mold effectively.The present invention can directly instruct the design of polymer micro-extrusion mold.
Description of drawings
Accompanying drawing is the structural representation of visual polymer micro-extrusion mold.
Among the figure: 1 tube connector; The 2A heating collar; The 3B heating collar; 4 handpiece bodies; 5 adjust bolt;
6 alignment pins; The 7C heating collar; The 8D heating collar; 9 baffle plates; 10 fastening bolts; The 11E heating collar; 12 visual neck ring mold; 13 pressure; 14 plugs; The 15A temperature sensor; 16 packing rings; The 17B temperature sensor; 18 ventilation bolts; 19 gripper shoes; The 20C temperature sensor; 21 fens flow cones;
The 22D temperature sensor; 23 flanges.
The specific embodiment
Be described in detail specific embodiments of the invention below in conjunction with technical scheme and accompanying drawing.
Use A heating collar 2, B heating collar 3, C heating collar 7, D heating collar 8,11 pairs of moulds of E heating collar to heat, make each regional temperature of mould reach setting value.Temperature keeps constant in A temperature sensor 15 on tube connector 1, handpiece body 4 and the visual neck ring mold 12, B temperature sensor 17, C temperature sensor 20, the D temperature sensor 22 control extrusions by being installed in.Under the effect of extruder screw, polymer melt flows into handpiece body 4 by tube connector 1, enters runner through 21 effects of minute flow cone, then under the acting in conjunction of plug 14 and visual neck ring mold 12, the melt cross sectional shape gradually reduces and reaches designing requirement, and extrudes from visual neck ring mold 12 outlets.Regulate and adjust bolt 5, make extrusion steadily, evenly.Temperature and pressure when extruding by the pressure 13 measurement stable states that are installed in visual neck ring mold 12 flat segments part; Use high-speed camera to take the flow regime of melt in the visual neck ring mold 12 simultaneously.
Melt flows process in the miniature interposing catheter extrusion die of observation thermoplastic polyurethane (TPU).
Operating procedure:
Step 1. uses drying baker to dry TPU at a certain temperature, removes moisture;
Step 2. starts extruder, and each section of extruder and each zone of mould are heated to design temperature stage by stage, and insulation a period of time;
Step 3. is poured the TPU plastic grain and the trace particle of oven dry into barrel after stirring, and screw speed is set, and extrudes;
Step 4. is regulated and is adjusted bolt according to extruded product cross sectional shape and the even situation of wall thickness, changes axiality and gap between plug and mouthful mould, makes extrusion even, stable;
Step 5. links to each other microlens with high-speed camera, regulate to take visual field light intensity, takes the flow regime of polymer melt in small runner, simultaneously the pressure and temperature situation of pressure record melt;
Step 6. is handled and is analyzed by data, obtains the distribution of micro-extrusion mold interpolymer melt flow field, rheological behavior and wall slippage speed;
Step 7. is provided with new expressing technique parameter, perhaps change branch flow cone, plug and the visual neck ring mold of different structure parameter, repeating step 2 ~ step 6 obtains the influence rule of little extrusion channel structure to the melt flows process, instructs the design of polymer micro-extrusion mold.

Claims (1)

1. a visual polymer micro-extrusion mold comprises tube connector (1), heating collar, handpiece body (4), adjustment bolt (5), alignment pin (6), baffle plate (9), fastening bolt (10), visual neck ring mold (12), pressure (13), plug (14), temperature sensor, packing ring (16), ventilation bolt (18), gripper shoe (19), divides flow cone (21), flange (23); Heating collar comprises A heating collar (2), B heating collar (3), C heating collar (7), D heating collar (8) and E heating collar (11); Temperature sensor comprises A temperature sensor (15), B temperature sensor (17), C temperature sensor (20), D temperature sensor (22); It is characterized in that: handpiece body links to each other with outlet of extruder with flange (23) by tube connector (1), divide flow cone (21) and plug (14) to be separately fixed at gripper shoe (19) both sides, adjustment bolt (5) and ventilation bolt (18) contact with gripper shoe (19) by the bolt hole on the handpiece body (4), utilize packing ring (16), baffle plate (9) and fastening bolt (10) are fixed on visual neck ring mold on the handpiece body, temperature sensor and heating collar are fixed on tube connector, the outside of handpiece body and visual neck ring mold (12), pressure (13) are installed in the aperture of flat segments of visual neck ring mold; Change branch flow cone (21), plug (14) and the visual neck ring mold (12) of different structure parameter as required; Use velocity field and the wall slippage speed of visual neck ring mold (12) observation polymer melt in the micro-extrusion mold runner of quartz glass material; Adopt the fixedly method of visual neck ring mold (12), adjustment plug (14), regulate axiality and gap between plug and the visual neck ring mold; The flat segments pressure of visual neck ring mold (12) is measured the pressure and temperature of polymer melt in little extrusion; Heating collar and temperature sensor control polymer melt keep the temperature of setting in little extrusion.
CN2009103092663A 2009-11-04 2009-11-04 Visual polymer micro-extrusion mold Expired - Fee Related CN101712197B (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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CN101712197B true CN101712197B (en) 2011-10-19

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CN102615805B (en) * 2012-03-22 2015-01-28 大连理工大学 Right-angle extrusion die for multi-cavity plastic micro-pipe
CN103538237B (en) * 2012-07-16 2016-04-13 宁波康润机械科技有限公司 A kind of co-extruding mould
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CN104792658B (en) * 2015-04-02 2018-03-27 青岛科技大学 A kind of flow-path module and research device for Study of Fluid flow regime
CN104772879A (en) * 2015-04-07 2015-07-15 郑州大学 Micro injection molding melt flow behavior visualized analysis detection system and method
CN104908172A (en) * 2015-06-24 2015-09-16 常州博美新材料科技有限公司 Mold head structure of extruder
CN105500666B (en) * 2015-11-30 2017-07-14 浙江伟星新型建材股份有限公司 A kind of extrusion die head special for PE microporous foam tubing
CN105675443B (en) * 2016-02-29 2018-09-25 太原工业学院 A kind of thin material cylinder capillary rheometer
CN107186991A (en) * 2017-07-04 2017-09-22 重庆都英科技有限公司 A kind of extrusion die of convenient change Oral incision
CN110126194B (en) * 2019-05-17 2020-06-02 北京化工大学 Visual injection molding nozzle
CN111483153B (en) * 2020-04-15 2023-04-25 山东新华医疗器械股份有限公司 Continuous production process for plastic bottles
CN112060537B (en) * 2020-08-27 2023-01-06 北京化工大学 Whole-course dynamic visual double-screw extrusion experimental equipment
CN113320116B (en) * 2021-06-18 2023-05-26 无锡井上华光汽车部件有限公司 Extrusion die with variable cross section and extrusion method
CN114643686B (en) * 2022-03-23 2023-05-12 大连理工大学 Precise extrusion die with sizing die structure for polyvinylidene fluoride pipe

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CN2231175Y (en) * 1995-05-05 1996-07-17 北京化工大学 Visible double screw extruder
US6814557B1 (en) * 1999-12-14 2004-11-09 Advanced Neuromodulation Systems, Inc. Apparatus and method of producing ultra thin wall extrusions and coatings
CN1982033A (en) * 2005-12-16 2007-06-20 张民良 Screw extruder of visual and adjusting screw, steel-jacket gap and binding length
CN100411854C (en) * 2005-03-04 2008-08-20 华南理工大学 Macromolecule material vibrating and plasticizing extrusion process visualized experimental equipment

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2231175Y (en) * 1995-05-05 1996-07-17 北京化工大学 Visible double screw extruder
US6814557B1 (en) * 1999-12-14 2004-11-09 Advanced Neuromodulation Systems, Inc. Apparatus and method of producing ultra thin wall extrusions and coatings
CN100411854C (en) * 2005-03-04 2008-08-20 华南理工大学 Macromolecule material vibrating and plasticizing extrusion process visualized experimental equipment
CN1982033A (en) * 2005-12-16 2007-06-20 张民良 Screw extruder of visual and adjusting screw, steel-jacket gap and binding length

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
JP特开2004-230874A 2004.08.19
JP特开平8-178854A 1996.07.12

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