CN104297122B - Measurement method for natural fiber fabric in-plane saturated permeability - Google Patents
Measurement method for natural fiber fabric in-plane saturated permeability Download PDFInfo
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- CN104297122B CN104297122B CN201310306055.0A CN201310306055A CN104297122B CN 104297122 B CN104297122 B CN 104297122B CN 201310306055 A CN201310306055 A CN 201310306055A CN 104297122 B CN104297122 B CN 104297122B
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Abstract
The invention relates to measurement methods for natural fiber fabric in-plane saturated permeability, and specifically discloses a measurement method, which comprises the steps of: (1) providing a fiber in-plane saturated permeability measurement device laid with a to-be-measured sample; (2) measuring and calculating the in-plane saturated permeability K0 of the to-be-measured sample when a first test solution fills a die cavity, with the first test solution not causing absorption expansion of the to-be-measured sample; (3) measuring and calculating the in-plane saturated permeability Kend of the to-be-measured sample when a second test solution fills the die cavity, and recording the time tend for filling the die by the second test solution, which causes absorption expansion of the to-be-measured sample; and (4) according to the formula K=K0-(K0-Kend)/tend*t, calculating the in-plane saturated permeability of the to-be-measured sample at different time, with the test solution(s) in step (2) and/or step (3) having constant flow. The measurement method provided by the invention can rapidly and accurately determine the saturated permeability of natural fiber fabrics, and has the characteristics of good repeatability of test data and numerical stability.
Description
Technical field
The present invention relates to testing of materials field, more particularly to a kind of measurement of saturated permeability in natural fabric face
Method.
Background technology
Natural-fiber composite material has the advantages that density is low, heat-insulated, inexpensive, aboundresources, degradable, renewable, makes
Its application in fields such as building industry, communications and transportation grows with each passing day.In recent years, shaping efficiency height, ring are mainly adopted both at home and abroad
The liquid composite molding technology that border is polluted less, industrial cost is low（LCM technology）Multiple to prepare high-performance natural fiber
Condensation material.And the permeability of natural fabric to be restriction LCM technology successfully prepare natural-fiber composite material whether key
Factor, but because the synthetic fibers such as natural fabric and glass fibre have obvious difference, as fabric have different
Structure, different weaving manner and different from resin contact interface mode, not yet have test natural fabric in the world
Saturated permeability standard method.
The method of traditional test saturated permeability is primarily directed to glass fibre etc. and does not absorb intumescent synthesis
Fiber.But the composition due to natural fabric is different from synthetic fibers, therefore simply will test synthetic fibers saturation
It is clearly impracticable that the method for rate is applied to natural fabric.
Therefore, develop a kind of system for natural-fiber composite material for the measuring method of saturated permeability in natural fiber face
Get everything ready significant.
Content of the invention
It is an object of the invention to provide in a kind of natural fabric face saturated permeability measuring method.
A first aspect of the present invention provides a kind of measuring method, including step：
(1) measurement apparatus of saturated permeability in a fibrous face are provided, laying in the die cavity of the mould of described measurement apparatus
There is testing sample；
(2) measure and calculate saturated permeability K in the face when the first test fluid is full of die cavity for the testing sample0, described
One test fluid does not make described testing sample produce absorption swelling；
(3) measure and calculate saturated permeability K in the face when the second test fluid is full of die cavity for the testing sampleend, and record
Second test fluid is full of the time t of die cavityend, described second test fluid makes described testing sample produce to absorb swelling；
(4) according to formula K=K0-(K0-Kend)/tend* t is calculated saturation in the face of testing sample different time
Rate,
And described measuring method has one or two features following：
In (i) step (2), measure saturated permeability K in described face under conditions of the flow of the first test fluid is constant0；
(ii), in step (3), under conditions of the flow of the second test fluid is constant, measure saturated permeability in described face
Kend.
In another preference, in step (1), described testing sample is natural fabric.
In another preference, described natural fabric includes：Natural fiber felt, natural fiber plain cloth, natural
Fiber twills or natural fiber one-way fabric.
In another preference, in step (1), described testing sample paving mode include unidirectional laying, orthogonal laying or
Quasi-isotropic laying.
In another preference, the number of plies of described laying is 3-20 layer, preferably 5-10 layer.
In another preference, in step (2), the flow of described first test fluid is 100-300ml/min, preferably
For 150-250ml/min.
In another preference, in step (3), the flow of described second test fluid is 100-300ml/min, preferably
For 150-250ml/min.
In another preference, in step (2), the viscosity of described first test fluid is 50-1000mpa.s；And/or step
Suddenly, in (3), the viscosity of described second test fluid is 50-1000mpa.s.
In another preference, in step (2), described first test fluid is selected from the group：Mineral oil, machine oil, silicone oil.
In another preference, in step (3), described second test fluid is selected from the group：Vinylite, phenolic resin,
Epoxy resin, unsaturated-resin.
In another preference, in step (2), the temperature of described first test fluid is 10-100 DEG C, preferably 20-
50℃.
In another preference, in step (3), the temperature of described second test fluid is 10-100 DEG C, preferably 20-
50℃.
In another preference, described measurement apparatus include：
Container；
Mini gear pump, the import of described Mini gear pump is connected with described container；
Mould, the gum-injecting port of described mould is connected with the outlet of described Mini gear pump, is provided with the die cavity of described mould
Pressure sensor；
Data acquisition unit, described data acquisition unit is connected with described pressure sensor；And
Camera head, described camera head is used for shooting described mould build-in test liquid flow fronts position.
In another preference, in step (2), add the first test fluid in the mould of described measurement apparatus so as to flow
Speed consistently one-way flow in a mold, the data of collection pressure sensor, and saturation in face is obtained according to Darcy's law
Rate K0.
In another preference, in step (3), add the second test fluid in the mould of described measurement apparatus so as to flow
Speed consistently one-way flow in a mold, the data of collection pressure sensor, and saturation in face is obtained according to Darcy's law
Rate Kend.
In another preference, described device also includes frequency converter, and described frequency converter is connected simultaneously with described Mini gear pump
And be used for adjusting miniature gears revolution speed.
In another preference, described device also includes flowmeter, and described flowmeter is arranged on the gum-injecting port of described mould
And the outlet of Mini gear pump between.
In another preference, described mould also includes gum outlet, is provided with flowmeter at described gum outlet.
In another preference, described device also includes collector, and described collector is connected with the outlet of flowmeter, uses
To collect the test fluid of outflow.
In another preference, described pressure sensor along along die cavity resin flow direction lineal layout in described mould
In die cavity.
In another preference, the number of described pressure sensor is 1-8, preferably 3-6.
It should be understood that within the scope of the present invention, above-mentioned each technical characteristic of the present invention and having in below (eg embodiment)
Can be combined with each other between each technical characteristic of body description, thus constituting new or preferred technical scheme.As space is limited, exist
This no longer tires out one by one states.
Brief description
Fig. 1 is the schematic top plan view of mould in the measurement apparatus of the present invention.
Fig. 2 is the assembling schematic diagram of the measurement apparatus of the present invention.
Specific embodiment
The present inventor, through research extensively and profoundly, develops one kind and is applied to saturated permeability in natural fabric face
Measuring method, inventor research find, will not make natural fiber produce absorb expand and make natural fiber produce absorb expand
Test fluid carry out mold filling respectively under conditions of flow is constant, and measure natural fiber in two kinds of test fluid of different nature
Saturated permeability, then obtain the variation relation formula of saturated permeability K and time t, you can solve existing method can not be fast
Speed accurately measures the problem of saturated permeability in natural fabric face.Complete the present invention on this basis.
As used herein, described " the first test fluid " refers to that so that natural fabric is produced absorbs intumescent test
Liquid, including but not limited to mineral oil, machine oil, silicone oil etc..
As used herein, described " the second test fluid " is to instigate natural fabric to produce to absorb intumescent test
Liquid, including but not limited to vinylite, phenolic resin, epoxy resin, unsaturated-resin etc..
As used herein, described " saturated permeability in face " and " saturated permeability " are used interchangeably.
The method of saturated permeability in measuring surface
The measuring method that the present invention provides, it may include following steps：
The first step：The selection of testing sample and laying
Testing sample is cut into the size being adapted to size with die cavity；Then according to ply sequence and the laying number of plies are spread
Layer, and calculate the porosity of the different numbers of plies.
The computational methods of fiber volume fraction：Vf=nξ/(1000*hρf),
In formula：VfFiber volume fraction
The number of plies of n tossa
The surface density of ξ tossa, unit g/m2
H die cavity thickness, unit mm
ρfThe density of tossa, unit g/cm3
Porosity：ε=1-Vf
Porosity and the relation of permeability：Carman-Kozeny model K=df 2ε3/（k（1-ε）2）
In formula：K permeability, unit m2
dfFibre diameter, unit m
K Kozeny constant
ε porosity
Testing sample is natural fabric.Natural fiber including jute, flax, cotton etc. for the natural fabric
Felt, natural fiber plain cloth, natural fiber twills or natural fiber one-way fabric etc..
Ply sequence is without particular limitation, can be laying at any angle, such as unidirectional laying, orthogonal laying, standard respectively to
Same sex laying etc..The laying number of plies is in 3-20 layer, preferably 5-10 layer.
Sensor is assemblied in die cavity screwed hole, gum-injecting port and gum outlet are connected with pipeline respectively.To choose again
Testing sample is completed by selected ply sequence and the laying number of plies.Install sealing strip in mold groove, by transparent tempering glass
Then plus steel cope match-plate pattern framework glass mold covers above, is fixed bolster with bolt, and bolt adds one up and down respectively
Individual pad is it is ensured that the seal of mould.
Second step：Measure testing sample saturated permeability in the face in the first test fluid
Add appropriate the first test fluid not making natural fiber generation absorption expand as mineral oil, machine oil etc. in a reservoir,
The viscosity of the first test fluid is identical with the viscosity of the second test fluid.Container pipeline is connected with Mini gear pump.First test fluid
Reach mould gum-injecting port through gear pump, flowmeter.Under the promotion of pressure, along the unidirectional flow forward of die cavity it is ensured that flow is permanent
Fixed.Data collecting card collects the data of pressure sensor and shows in a computer, controls the flow of flowmeter at glue-feeder
Q, with the whole position shooting the first test fluid flow fronts of digital camera.It is calculated saturated permeability according to Darcy's law
K.
The computational methods of Darcy's law：K=(μQL)/(AΔP)
In formula：Q volume flow rate（m3/s）
μ tests fluid viscosity（Pa·s）
A die cavity sectional area（m2）
Δ P test fluid passes through pressure differential during length L（Pa）
K permeability（m2）
In order to ensure to measure the accuracy of saturated permeability, by the rotating speed of Frequency Converter Control Mini gear pump, make miniature
The rotating speed of gear pump reaches desired value.Flowmeter monitors the flow of the first test fluid it is ensured that flow is constant.Test liquor stream first
It is ensured that the speed well of test liquid wetting fibre during dynamic.Flow controls in 100-300ml/min.
3rd step：Measure testing sample saturated permeability in the face in the second test fluid
Add appropriate the second survey making natural fiber generation absorption expand as vinylite, phenolic resin etc. in a reservoir
Test solution, repeats second step, records mould-filling time tend, it is calculated saturated permeability K in face according to Darcy's lawend.Calculating side
Method：Kend=(μQL)/(AΔP)=(μL2ε)/(ΔPtend), in formula, each parameter is defined as above.Due in measurement process, sky
So absorbing of fabric expands the saturated permeability making natural fabric also in continuous generation minor variations, the second survey
The flow resistance change of test solution, thus affect flow during the second test fluid injection.In order to ensure the saturation of natural fabric
The accuracy of permeability determination, it is necessary to assure in measurement process, flow is constant.
4th step：Obtain the variation relation formula of saturated permeability K and time t in natural fabric face
Record test fluid is full of the time t of mouldend, and according to formula K（t）=K0-(K0-Kend)/tend* t calculate natural
The saturated permeability in different mould-filling time for the fabric, can obtain natural fabric saturated permeability and time simultaneously
Relational expression.
The measurement apparatus of saturated permeability in natural fabric face
The measurement apparatus of the present invention are primarily referred to as the fibre reinforcement being applied in polymer matrix composites in roofing
The measurement apparatus of saturated permeability, can be the conventional dresses for measuring saturated permeability in fibrous face known in the art
Put.
The preferred measurement apparatus of the present invention one class mainly include：Container, Mini gear pump, mould, camera head and number
According to harvester.Wherein, container is used for containing the first test fluid and the second test fluid, and mould is by die cavity, steel lower template, steel
Cope match-plate pattern framework, safety glass cope match-plate pattern and heating pipe composition.Have gum-injecting port and gum outlet in the front and back end of die cavity.
It is evenly distributed with screwed hole in die cavity between gum-injecting port and gum outlet, screwed hole is equipped with pressure sensor, pressure
Sensor and data acquisition unit（As data collecting card and computer）It is connected.
Container is connected with the import of Mini gear pump by pipeline, and the outlet of gear pump passes through pipeline with the gum-injecting port of mould
Connect, between the outlet of gear pump and the gum-injecting port of mould, and all flowmeter be connected with by pipeline at mould gum outlet,
With the flow of accurate measurements test fluid it is ensured that flow is constant.Camera head（As digital camera）It is placed in the top of mould, be used for
Shoot the position of mould build-in test liquid flow fronts.
Measurement apparatus used in the present invention also include frequency converter, and frequency converter is connected by pipeline with gear pump, for adjusting
Section gear revolution speed is it is ensured that the flow of test fluid is constant.By adjusting frequency converter, the rotating speed of Mini gear pump is made to reach properly
Value.
Measurement apparatus used in the present invention also include collector, and collector is connected by pipeline with flowmeter at gum outlet
Connect, for collecting the test fluid of outflow.
Compared with prior art, the present invention mainly has advantages below：
（1）The saturated permeability of natural fabric fast and accurately can be measured.
（2）The species that can be used for the natural fabric of mensure is many, and can achieve natural fabric difference fabric shape
State, the mensure of the saturated permeability of different ply sequences and the laying number of plies.
（3）Measuring method is simple to operation, measurement apparatus low manufacture cost.
（4）The natural fiber saturated permeability value that the method for the present invention measures is reproducible, and numerical stability, to technological parameter
There is higher directive significance, it is to avoid product produces the defects such as dry spot and scraps.
The features described above that the present invention mentions, or the feature that embodiment is mentioned can be in any combination.Disclosed in this case specification
All features can be used in combination with any combinations thing form, each feature disclosed in specification, can any be provided identical,
The alternative characteristics of impartial or similar purpose replace.Therefore removing has special instruction, and disclosed feature is only impartial or similar spy
The general example levied.
With reference to specific embodiment, the present invention is expanded on further.It should be understood that these embodiments are merely to illustrate the present invention
Rather than restriction the scope of the present invention.The experimental technique of unreceipted actual conditions in the following example, generally according to conventional strip
Part or according to the condition proposed by manufacturer.Unless otherwise indicated, otherwise percentage and number are calculated by weight.
Unless otherwise defined, all specialties used in literary composition and scientific words and meaning familiar to one skilled in the art institute
Justice is identical.Additionally, any method similar or impartial to described content and material all can be applicable in the inventive method.Wen Zhong
Described preferable implementation is only presented a demonstration with material and is used.
The structure of the measurement apparatus that embodiment 1 measuring method of the present invention is used
As shown in Figure 1-2, this measurement apparatus mainly includes：Container 1, Mini gear pump 2, mould 3, digital camera 4, number
According to capture card 5 and computer 6.Wherein, container is used for containing the first test fluid and the second test fluid, and mould 3 is by die cavity 31, steel
Lower template 32, steel cope match-plate pattern framework 33, safety glass cope match-plate pattern 34 and heating pipe（Do not mark）Composition.Before die cavity 31
End have 1 gum-injecting port 35, the rear end of die cavity 31 in the width direction each side have 1 gum outlet 36, gum-injecting port
It is 5mm with the aperture of gum outlet.Gum-injecting port 35 is connected with pipeline respectively with gum outlet 36.Gum-injecting port 35 and gum outlet 36 it
Between die cavity in be evenly distributed with 5 screwed holes 37, a diameter of 20mm of screwed hole, 5 pressure sensors 10 are assemblied in die cavity
In 5 screwed holes 37 in, pressure sensor 10 is connected with data collecting card 5 and computer 6, plastic holding device 1 pass through pipeline with
The import of Mini gear pump 2 connects, and the outlet of Mini gear pump 2 is connected by pipeline with the gum-injecting port 35 of mould 3, in miniature tooth
Between the gum-injecting port 35 of the outlet of wheel pump 2 and mould 3, and at mould gum outlet 36, it is equipped with flowmeter 7, surveyed with accurate measurements
The flow of test solution is it is ensured that test flow quantity is constant.Gear pump is also associated with frequency converter 8, and digital camera 4 is placed in the upper of mould 3
Side, for shooting the position of mould build-in test liquid flow fronts.It is connected with the port of export of the flowmeter 7 being connected with gum-injecting port 35
Collector 9, for collecting the test liquid of outflow.
The mensure of the saturated permeability of tossa of the different laying number of plies of embodiment 2
The first step：The selection of testing sample and laying
Surface density is 450g/m2Two-way braiding tossa cloth be cut into and cavity dimension matched size（13cm*
28cm）；Then the fiber cutting is carried out laying.5 layers, 6 layers, 7 layers respectively of the laying number of plies；Being calculated during the different number of plies should
The porosity of tossa.
Install sealing strip in mold groove, transparent safety glass mold is covered above, mould then plus on steel
Bolster is fixed by plate framework with bolt, and bolt adds a pad it is ensured that the seal of mould up and down respectively.
Second step：Measure testing sample saturated permeability in the face in mineral oil
Add appropriate mineral oil in a reservoir（Viscosity is identical with actual resin, is 190mPa s）, with pipeline with micro-
Type gear pump connects.Adjust frequency converter, make the rotating speed of Mini gear pump reach desired value,.Resin reaches through gear pump, flowmeter
Mould gum-injecting port.Under the promotion of pressure, flow（200ml/min）Consistently along the unidirectional flow forward of die cavity, data acquisition
Card collects the data of 5 pressure sensors and shows in a computer, the data of 5 pressure sensors be successively P1, P2,
P3, P4, P5, with the whole position shooting resin flow fronts of digital camera.Obtain saturation in face according to Darcy's law
Rate K.
3rd step：Measure testing sample saturated permeability in the face in phenolic resin
Add appropriate phenolic resin in a reservoir, repeat second step, be calculated saturated permeability according to Darcy's law
Kend.
4th step：Obtain the variation relation formula of saturated permeability K and time t in natural fabric face
Record mould-filling time tend, according to relational expression K（t）=K0-(K0-Kend)/tend* t calculates natural fabric not
With the saturated permeability of mould-filling time, and obtain the relational expression of natural fabric saturated permeability and time.（The unit of t is
Second）
The tossa cloth saturated permeability of the two-way braiding of test gained, and the relational expression of saturated permeability and time
As shown in table 1：
Table 1 test result
The mensure of the saturated permeability of tossa woven roving under embodiment 3 different temperatures
It is test object using tossa woven roving.Fabric is cut into 13*28cm2Lay 5 layers afterwards, respectively with mineral
Oil, vinylite are test fluid, measure unidirectional saturated permeability in fiber volume fraction fibrous face when 47.65% it is ensured that flowing
Amount constant and control in 200ml/min.Test temperature is 25 DEG C, 35 DEG C, 45 DEG C.
The natural fiber saturated permeability of test gained, and relational expression such as table 2 depicted of saturated permeability and time：
Table 2 test result
As can be seen from Table 2, with the rising of temperature, saturated permeability is increased with the slope in time history form, and saturation is oozed
Saturating rate decrease speed is faster.
The mensure of the saturated permeability of tossa woven roving under the different test condition of embodiment 4
At present, the method measuring saturated permeability in fabric face mainly includes constant current mensure and constant voltage mensure.This reality
Apply example and pass through two methods, one kind is constant pressure（Control glue-feeder pressure is 0.25MPa）, one kind is constant flow rate（Control
Glue-feeder constant flow rate is in 200ml/min）, duplicate measurements 5 times, the stability of two kinds of method of testings of contrast.Using tossa
Woven roving is test object.Fabric is cut into 13*28cm2Lay 5 layers afterwards, mineral oil, vinylite are test fluid, measure
Unidirectional saturated permeability in 25 DEG C of fiber volume fraction fibrous face when 47.65%.
The natural fiber saturated permeability of test gained, and relational expression such as table 3 depicted of saturated permeability and time：
Table 3 test result
From table 3 it can be seen that the numerical value K measuring under constant-pressure conditions0And KendFluctuation larger, and under constant current conditions
The saturated permeability of test is more stable than the saturation rate score of test under constant-pressure conditions, and result is more accurate.
The all documents referring in the present invention are all incorporated as reference in this application, independent just as each document
It is incorporated as with reference to like that.In addition, it is to be understood that after the above-mentioned instruction content having read the present invention, those skilled in the art can
To make various changes or modifications to the present invention, these equivalent form of values equally fall within the model that the application appended claims are limited
Enclose.
Claims (18)
1. a kind of measuring method is it is characterised in that include step：
(1) measurement apparatus of saturated permeability in a fibrous face are provided, laying in the die cavity of the mould of described measurement apparatus needs
Test sample product；And described testing sample is natural fabric；
(2) measure and calculate saturated permeability K in the face when the first test fluid is full of die cavity for the testing sample0, described first test
Liquid does not make described testing sample produce absorption swelling；
(3) measure and calculate saturated permeability K in the face when the second test fluid is full of die cavity for the testing sampleend, and record second
Test fluid is full of the time t of die cavityend, described second test fluid makes described testing sample produce to absorb swelling；
(4) according to formula K=K0-(K0-Kend)/tend* t is calculated saturated permeability in the face of testing sample different time,
And described measuring method has one or two features following：
In (i) step (2), measure saturated permeability K in described face under conditions of the flow of the first test fluid is constant0；
(ii), in step (3), measure saturated permeability K in described face under conditions of the flow of the second test fluid is constantend；
And the viscosity of described first test fluid is identical with the viscosity of described second test fluid.
2. measuring method as claimed in claim 1 is it is characterised in that described natural fabric includes：Natural fiber felt, sky
So fiber plain cloth, natural fiber twills or natural fiber one-way fabric.
3. measuring method as claimed in claim 1 is it is characterised in that in step (1), described testing sample paving mode includes
Unidirectional laying, orthogonal laying or quasi-isotropic laying.
4. measuring method as claimed in claim 3 is it is characterised in that the number of plies of described laying is 3-20 layer.
5. measuring method as claimed in claim 1 is it is characterised in that in step (2), the flow of described first test fluid is
100-300ml/min.
6. measuring method as claimed in claim 1 is it is characterised in that in step (3), the flow of described second test fluid is
100-300ml/min.
7. measuring method as claimed in claim 1 it is characterised in that
In step (2), the viscosity of described first test fluid is 50-1000mpa.s；And/or
In step (3), the viscosity of described second test fluid is 50-1000mpa.s.
8. measuring method as claimed in claim 1 is it is characterised in that in step (2), described first test fluid is selected from the group：
Mineral oil, machine oil, silicone oil；And/or
In step (3), described second test fluid is selected from the group：Vinylite, phenolic resin, epoxy resin, unsaturated-resin.
9. measuring method as claimed in claim 1 is it is characterised in that in step (2), the temperature of described first test fluid is
10-100 DEG C；And/or
In step (3), the temperature of described second test fluid is 10-100 DEG C.
10. measuring method as claimed in claim 1 is it is characterised in that described measurement apparatus include：
Container；
Mini gear pump, the import of described Mini gear pump is connected with described container；
Mould, the gum-injecting port of described mould is connected with the outlet of described Mini gear pump, is provided with pressure in the die cavity of described mould
Sensor；
Data acquisition unit, described data acquisition unit is connected with described pressure sensor；And
Camera head, described camera head is used for shooting described mould build-in test liquid flow fronts position.
11. measuring methods as claimed in claim 10 it is characterised in that in step (2), in the mould of described measurement apparatus
Add the first test fluid so as to constant flow rate ground one-way flow in a mold, gather the data of pressure sensor, and according to darcy
Law obtains saturated permeability K in face0.
12. measuring methods as claimed in claim 10 it is characterised in that in step (3), in the mould of described measurement apparatus
Add the second test fluid so as to constant flow rate ground one-way flow in a mold, gather the data of pressure sensor, and according to darcy
Law obtains saturated permeability K in faceend.
13. measuring methods as claimed in claim 10 it is characterised in that described device also includes frequency converter, described frequency converter
It is connected with described Mini gear pump and is used for adjust miniature gears revolution speed.
14. measuring methods as claimed in claim 10 it is characterised in that described device also includes flowmeter, described flowmeter
It is arranged between gum-injecting port and the outlet of Mini gear pump of described mould.
15. measuring methods as claimed in claim 10 it is characterised in that described mould also includes gum outlet, described gum outlet
Place is provided with flowmeter.
16. measuring methods as claimed in claim 15 it is characterised in that described device also includes collector, described collector
It is connected with the outlet of flowmeter, for collecting the test fluid of outflow.
17. measuring methods as claimed in claim 10 are it is characterised in that described pressure sensor resin flowing side along along die cavity
To lineal layout in the die cavity of described mould.
18. measuring methods as claimed in claim 10 are it is characterised in that the number of described pressure sensor is 1-8.
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