CN101462354A - Plastic multi-cavity tube micro-extrusion flow equilibrium detection apparatus - Google Patents
Plastic multi-cavity tube micro-extrusion flow equilibrium detection apparatus Download PDFInfo
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- CN101462354A CN101462354A CNA2009100100263A CN200910010026A CN101462354A CN 101462354 A CN101462354 A CN 101462354A CN A2009100100263 A CNA2009100100263 A CN A2009100100263A CN 200910010026 A CN200910010026 A CN 200910010026A CN 101462354 A CN101462354 A CN 101462354A
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- 229920003023 plastic Polymers 0.000 title claims abstract description 44
- 239000004033 plastic Substances 0.000 title claims abstract description 44
- 238000001125 extrusion Methods 0.000 title claims abstract description 38
- 238000001514 detection method Methods 0.000 title claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 238000005259 measurement Methods 0.000 claims abstract description 5
- 238000010276 construction Methods 0.000 claims description 2
- 238000000048 melt cooling Methods 0.000 claims 1
- 238000001816 cooling Methods 0.000 abstract description 3
- 238000000465 moulding Methods 0.000 abstract description 3
- 230000001276 controlling effect Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000013461 design Methods 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000003814 drug Substances 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 210000003205 muscle Anatomy 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
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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
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
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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
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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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92009—Measured parameter
- B29C2948/92209—Temperature
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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
- 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
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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
- 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 flow balance detecting device for the micro-extrusion of plastic multi-cavity pipes, which belongs to the technical field of plastic extrusion molding. The detecting device is characterized in that the detecting device comprises a connecting base, a shunt cone, a shunt bracket plate, a core, a finish mold backing plate, a finish mold insert, a centring adjustment bolt, a temperature controller, a thermocouple and a heating ring; the shunt cone, the core and the finish mold insert on the detecting device are replaced according to the measurement results of the section shape-size of plastic melt after cooling and molding; the concentricity of the finish mold insert and the core is regulated through the centring adjustment bolt arranged on the finish mold backing plate; and the temperature controller, the thermocouple and the heating ring are used for controlling the required temperature of detection in the process of extruding and molding the plastic melt. The matching relation and change law among the section shape-size of multi-cavity pipes, the structural parameters of runners and extrusion process parameters during the micro-extrusion flow balance of the plastic melt is directly obtained through the detecting device, so as to establish a theory of designing micro-extrusion dies for the plastic multi-cavity pipes.
Description
Technical field
The invention belongs to the plastic extruding forming technical field, specially refer to a kind of design of plastic multi-cavity tube micro-extrusion flow equilibrium detection apparatus.
Background technology
At present, the especially medical multi-cavity interposing catheter of plastic multi-cavity tube has characteristics such as size is small, cross sectional shape is complicated, geometric accuracy is high, sanitary index is high, biochemical stability height, is the little extrusion moulding product of plastics of a kind of high technology content, high added value.Because be subjected to the restriction of extrusion equipment, extrusion die and the technology that forms a complete production network, the plastic multi-cavity interposing catheter costs an arm and a leg, every from tens to hundreds of or thousands of dollars, seriously restricted interventional medicine Study on Technology and clinical practice.Extrusion die is the key equipment of the little extrusion molding of plastic multi-cavity tube, is directly determining Forming Quality and production efficiency.Extrusion die designing requirement plastic melt is mobile necessary balance in extrusion channel, otherwise defectives such as interior muscle cracking, wall unevenness, cross section distortion will appear in conduit.Therefore, how to obtain the flow passage structure parameter of flow equilibrium rapidly and accurately, become the key technology of plastic multi-cavity tube micro-extrusion mold design.
Usually following two kinds of methods are mainly adopted in the design of plastic multi-cavity tube micro-extrusion mold: a kind of method is a Method for Numerical, adopts finite element analysis software that plastic melt Extrusion Flow process is carried out numerical simulation, constantly revises the flow passage structure parameter according to analog result.Because minute yardstick viscosity characteristics, the wall slippage boundary condition of plastic melt in small runner has been different from traditional macro Extrusion Flow process, the research of the theory of correlative technology fields such as little rheology of high polymer molten, microfluid mechanics, little thermal conduction study and technology itself is ripe not enough in addition, adding does not still have little Extrusion Flow analysis software at present and adopts traditional macro Extrusion Flow analysis software, so numerical simulation result is inaccurate and insecure.Another kind method is trial-and-error method, relies on the design experiences of traditional macro extrusion die exactly, designs and manufactures micro-extrusion mold, then by constantly repair a die, die trial and adjusting repeatedly, till meeting the demands.This method designing quality and design efficiency are low, waste a large amount of man power and materials, prolong the mould production cycle.So, if can obtain the flow passage structure parameter of plastic multi-cavity tube micro-extrusion flow equilibrium rapidly and accurately, will directly solve the design challenges of micro-extrusion mold, all have great importance to promoting the extensive use of plastic multi-cavity tube in the interventional medicine field.
Summary of the invention
The object of the present invention is to provide a kind of plastic multi-cavity tube micro-extrusion flow equilibrium detection apparatus, be used to detect plastic multi-cavity tube Extrusion Flow state, obtain the flow passage structure parameter of flow equilibrium, measurement result can directly instruct the design of plastic multi-cavity tube micro-extrusion mold.
Technical scheme of the present invention is a kind of plastic multi-cavity tube micro-extrusion flow equilibrium detection apparatus, comprising: connect base, divide flow cone, shunting supporting plate, core, mouthful die-cushion plate, a mouthful mould are inserted, centering is adjusted bolt, temperature controller, thermocouple and heating collar.This checkout gear adopts the combination formula structure of inserting, connect a base and a mouthful die-cushion plate be installed in respectively the top of shunting supporting plate and below, adopt the staged hermetically-sealed construction between them.Divide flow cone be installed in the shunting supporting plate above; Core be installed in the shunting supporting plate below, fix by trip bolt; Mouthful mould insert be installed in mouthful die-cushion plate above, mouthful mould insert and core between axiality adjust bolt by centering and regulate.The molten plastic melt enters shunting supporting plate and mouthful inside die cavity that the die-cushion plate forms by connecting base under the effect of pressure, by after shunting and the compression, extrude from the slit that the mouth mould is inserted and core forms then.Temperature controller, thermocouple and heating collar are used for controlling the plastic melt extrusion and keep stationary temperature.This checkout gear not only can be installed on the extruder by the screw thread that connects on the base, also can be directly installed on the capillary rheometer.
According to cross sectional shape dimensional measurement result behind the goods cooling forming, can change branch flow cone, core and mouthful mould of different structure parameter and insert, obtain matching relationship and Changing Pattern between plastic products cross sectional shape size and the flow passage structure parameter.
Effect of the present invention and benefit are: adopt this device can obtain the cross sectional shape size of plastic multi-cavity tube and matching relationship and the Changing Pattern between flow passage chamber structural parameters and the expressing technique parameter, foundation is based on the plastic multi-cavity tube micro-extrusion mold flow passage structure parameter designing experience database of flow equilibrium, reduce mould design and manufacturing cost, reduce the die trial and the number of times that repairs a die, shorten the mould production cycle.Simultaneously, this device has also been expanded the function of present traditional capillary rheometer, expands to from single plastic melt rheological behavior test function to have mould multi-cavity flow passage balance detection function.In addition, the plastic multi-cavity tubing products for less in batches also can carry out the trial-production and the production of small lot by this device.In sum, the present invention improves plastic multi-cavity tube micro-extrusion mold design level with a step, promotes its extensive use at high-technology fields such as interventional medicines.
Description of drawings
Fig. 1 is the structural representation of plastic multi-cavity tube micro-extrusion flow equilibrium detection apparatus.
Fig. 2 is TPUE (TPU) multi-lumen tube sectional view.
Among the figure: 1 connects base; 2 fens flow cones; 3 shunting supporting plates; 4 cores; 5 centerings are adjusted bolt; 6 mouthfuls of moulds are inserted; 7 mouthfuls of die-cushion plates; 8 temperature controllers; 9 thermocouples; 10 heating collars.
The specific embodiment
Be described in detail most preferred embodiment of the present invention below in conjunction with technical scheme and accompanying drawing.
Detect TPUE (TPU) when 190 ℃ of temperature, the flow passage structure parameter the during flow equilibrium of extrusion molding multi-lumen tube, the multi-lumen tube cross section as shown in Figure 2, the embodiment step is as follows:
Step 1
Select the branch flow cone, core of certain structural parameters and a mouthful mould to insert according to the multi-lumen tube sectional dimension, assemble according to shown in Figure 1, divide flow cone be installed in the shunting supporting plate above; Core be installed in the shunting supporting plate below, fix by trip bolt; Mouthful mould insert be installed in mouthful die-cushion plate above.
Step 2
Measure that mouthful mould is inserted and core between the slit, make the slit between them reach evenly by continuous adjustings centering adjustment bolt, guarantee the axiality between them.
Step 3
This device is connected with the barrel of capillary rheometer by the screw thread that connects on the base.
Flow graph barrel and this device are heated to design temperature, in the flow graph barrel, add the TPU plastics.
Step 5
Plunger is descended at a slow speed, and when contacting with plastics, plunger stops; Treat that the plastic molting back-plunger descends at a slow speed, when the demonstration reading of pressure sensor hour, plunger stops.
Plunger descends with the speed of setting, plastic melt from the mouth mould insert and core between the slit extrude, the plastic parison of formation is behind cooling and shaping, cutting forms the multi-lumen tube goods.
Multi-lumen tube is carried out cross sectional shape with employing continuous zoom body microscope and size is measured, and judges as requested whether the multi-lumen tube of moulding is qualified; If the cross section meets the requirements, then the flow passage structure parameter of this device is the dirty dynamically balanced flow passage structure parameter of expressing technique parameter that this multi-lumen tube is being set.
Step 8
If phenomenons such as wall unevenness, interior muscle cracking, distortion appear in multi-lumen tube, then undesirable, the plastic melt imbalance of flow is described, should change branch flow cone, core and mouthful mould of other series structure parameter inserts, repeating step 1～7 then, till the multi-lumen tube cross sectional shape dimensional measurement result of extrusion molding meets the requirements.
Claims (2)
1. plastic multi-cavity tube micro-extrusion flow equilibrium detection apparatus, comprise connect base (1), divide flow cone (2), shunting supporting plate (3), core (4), centering are adjusted bolt (5), a mouthful mould is inserted (6), mouthful die-cushion plate (7), temperature controller (8), thermocouple (9) and heating collar (10), it is characterized in that: connect a base (1) and a mouthful die-cushion plate (7) be installed in respectively the top of shunting supporting plate (3) and below, employing staged hermetically-sealed construction; Divide flow cone (2) and core (4) to be installed in the both sides up and down of shunting supporting plate (3) respectively; The mouth mould is inserted (6) and the axiality of core (4) is adjusted bolt (5) adjusting by centering; Plastic melt keeps detecting required temperature by temperature controller (8), thermocouple (9) and heating collar (10) control in the extrusion molding process.
2. a kind of plastic multi-cavity tube micro-extrusion flow equilibrium detection apparatus as claimed in claim 1 is characterized in that: according to cross sectional shape dimensional measurement result behind the plastic melt cooling forming, change different branch flow cones (2), core (4) and a mouthful mould insert (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100100263A CN101462354B (en) | 2009-01-05 | 2009-01-05 | Plastic multi-cavity tube micro-extrusion flow equilibrium detection apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100100263A CN101462354B (en) | 2009-01-05 | 2009-01-05 | Plastic multi-cavity tube micro-extrusion flow equilibrium detection apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN101462354A true CN101462354A (en) | 2009-06-24 |
| CN101462354B CN101462354B (en) | 2010-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100100263A Expired - Fee Related CN101462354B (en) | 2009-01-05 | 2009-01-05 | Plastic multi-cavity tube micro-extrusion flow equilibrium detection apparatus |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101947846A (en) * | 2010-09-16 | 2011-01-19 | 大连理工大学 | Ultrasonic vibration microtube extrusion mould |
| CN102538999A (en) * | 2012-01-12 | 2012-07-04 | 上海交通大学 | Extrusion die temperature field testing device |
| CN105675443A (en) * | 2016-02-29 | 2016-06-15 | 太原工业学院 | Single-feed-cylinder capillary rheometer |
| CN107775928A (en) * | 2017-11-21 | 2018-03-09 | 文三佳科技股份有限公司 | Co-extrusion extrusion die and repair method after a kind of cavity for being easy to repair |
| CN114384069A (en) * | 2022-01-12 | 2022-04-22 | 大连理工大学 | Flow balance and swelling deformation synchronous monitoring device in polymer micro-extrusion process |
-
2009
- 2009-01-05 CN CN2009100100263A patent/CN101462354B/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101947846A (en) * | 2010-09-16 | 2011-01-19 | 大连理工大学 | Ultrasonic vibration microtube extrusion mould |
| CN101947846B (en) * | 2010-09-16 | 2012-09-12 | 大连理工大学 | Ultrasonic vibration microtube extrusion mould |
| CN102538999A (en) * | 2012-01-12 | 2012-07-04 | 上海交通大学 | Extrusion die temperature field testing device |
| CN102538999B (en) * | 2012-01-12 | 2013-08-21 | 上海交通大学 | Extrusion die temperature field testing device |
| CN105675443A (en) * | 2016-02-29 | 2016-06-15 | 太原工业学院 | Single-feed-cylinder capillary rheometer |
| CN105675443B (en) * | 2016-02-29 | 2018-09-25 | 太原工业学院 | A kind of thin material cylinder capillary rheometer |
| CN107775928A (en) * | 2017-11-21 | 2018-03-09 | 文三佳科技股份有限公司 | Co-extrusion extrusion die and repair method after a kind of cavity for being easy to repair |
| CN114384069A (en) * | 2022-01-12 | 2022-04-22 | 大连理工大学 | Flow balance and swelling deformation synchronous monitoring device in polymer micro-extrusion process |
| CN114384069B (en) * | 2022-01-12 | 2024-02-20 | 大连理工大学 | Flow balance and swelling deformation synchronous monitoring device in polymer micro-extrusion process |
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| Publication number | Publication date |
|---|---|
| CN101462354B (en) | 2010-08-11 |
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