CN104853894B - The capturing element of molding and manufacture method thereof - Google Patents
The capturing element of molding and manufacture method thereof Download PDFInfo
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- CN104853894B CN104853894B CN201380062181.4A CN201380062181A CN104853894B CN 104853894 B CN104853894 B CN 104853894B CN 201380062181 A CN201380062181 A CN 201380062181A CN 104853894 B CN104853894 B CN 104853894B
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- catching portion
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- 238000004519 manufacturing process Methods 0.000 title claims description 13
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- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 239000011521 glass Substances 0.000 claims abstract description 11
- 238000002347 injection Methods 0.000 claims abstract description 5
- 239000007924 injection Substances 0.000 claims abstract description 5
- 238000001757 thermogravimetry curve Methods 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 23
- 239000004793 Polystyrene Chemical group 0.000 claims description 7
- 230000000875 corresponding Effects 0.000 claims description 7
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 5
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 5
- 239000004695 Polyether sulfone Chemical group 0.000 claims description 4
- 239000004697 Polyetherimide Chemical group 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 229920002496 poly(ether sulfone) Chemical group 0.000 claims description 4
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- 238000001938 differential scanning calorimetry curve Methods 0.000 claims description 3
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- MTAZNLWOLGHBHU-UHFFFAOYSA-N Butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims 1
- 150000002825 nitriles Chemical class 0.000 claims 1
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Abstract
The present invention relates to the capturing element of a kind of positive negative or positive automatic clamping device, it includes axle section (1) and catching portion (2), axle section extends transverse to the axis of base band (B), and catching portion highlights laterally from axle section, it is characterized in that, at least catching portion is had more than 1000MPa by 25 DEG C, especially greater than 1200MPa, the particularly greater than thermoplastic of the bending modulus of 1500MPa is made, capturing element is by molding, produce especially by injection mo(u)lding, when drawing for the thermogram of hook, i.e. when carrying out differential scanning calorimetry, it can be seen that do not exist near glass transition or there's almost no lax enthalpy during heating up first.
Description
The present invention relates to male-female (male-female) (hook-and-loop type (hook-in-loop type)) or the positive-
Positive (male-male) (hook-hook type (hook-in-hook type)) contact and close-up fastener (touch-and-close
Fastener) positive part, including a wheel shaft (shank) and the catching portion (catching highlightedly of the side from wheel shaft
part).Especially, the present invention can relate to the element of hook-type or mushroom-shaped.The invention still further relates to containing such sun
The male-female of property element or the contact of the positive-positive and closing device.The invention still further relates to manufacture such positive
The method of element and for manufacturing the equipment of such male element.
Hook-type or the male element of mushroom-shaped, hereinafter will be referred to generally as capturing element (catching
Elements), it, by being made up of thermoplastic (thermoplastic) molding, is known prior art.Mould be by
The chamber of the definite shape supplementing the capturing element being filled with moulded thermoplastics is made, then by peeling off them from chamber
Carry out the demoulding.
For mushroom, those only with the thinnest head just can manufacture by this way.Shortcoming is,
This seizure subsequently can not bear various pressure well, particularly constitutes the parts of contact and close-up fastener for the moment when mushroom
Stripping pull strength.Problem is, if it is possible to obtain a thick head, it is possible to no longer peel off this head from the chamber of molding.With mushroom
Mushroom is compared, and for the capturing element of hook-type, the capturing element of these hook-types is easier to be manufactured by molding.
But, it is possible to from the chamber of molding, separate their demand cause in terms of shape and material the constraint manufactured, especially, this
Mean that obtained hook is medium seizure quality a bit.Especially, it is possible to by amorphous or essentially amorphous thermoplastic
(being i.e. contained within the thermoplastic of the unbodied thermoplastic of rigidity of notable percentage ratio by it) produces this hook will be very
Alright.Now, because such material is special rigidity (has at least 1000MPa, especially greater than 1200MPa, especially
Bending modulus (bending modulus) higher than 1500MPa, even 2000MPa), with a kind of simply by the chamber molded
In eject the demoulding of they compositions to make them make hook to be impossible (even if such demoulding is for large-scale production
It is particularly advantageous) because once hook has been peeled off from mould or sprayed, they are degenerated the most very much and are not had a bit seizure energy
Power.
The present invention attempts to overcome the shortcoming of prior art by proposing a kind of method, the method allow mentioned above this
The positive of type or capturing element are by being manufactured by amorphous or essentially amorphous thermoplastic molding, with from mould
Spraying in the chamber moulded or peel off, this is highly advantageous for large-scale commercial production.
According to the present invention, it is provided that a kind of method manufacturing capturing element, this capturing element includes transverse to base band
Axle section that the axle axis of (base band) extends from base band and with the axis direction transverse to wheel shaft from wheel shaft laterally
Prominent catching portion, the method comprises the following steps:
-offer supplements the chamber of the molding of the definite shape of capturing element；
-with can forma fluens, especially with viscosity or slurry form, the thermoplastic of molding is incorporated into molding
Chamber in；
-temperature of the thermoplastic in the intracavity portion of molding is regulated to being included between Tg-Δ Tg and Tg+ Δ Tg
TMoldingValue, Tg is the glass transition temperature of thermoplastic, and Δ Tg is equal to about 30 DEG C, preferably equal to about 15 DEG C；
-element is in this temperature TMoldingUnder carry out the demoulding；And
-by the element of the demoulding than TMoldingAt a temperature of low, place the most at ambient temperature with cooling.
According to one preferred embodiment, thermoplastic is unbodied or essentially amorphous, and Δ Tg is equal to
About 15 DEG C.
Preferably, temperature T of the thermoplastic in the chamber of moldingMoldingBy making the chamber of molding be temperature TMoldingAdjust
Joint.
Preferably, higher than temperature TMoldingTemperature TIntroduceLower thermoplastic is incorporated in the chamber of molding, walks in the demoulding
Suddenly, before starting, temperature T making the temperature of material reach the chamber molded is placedMolding。
The invention still further relates to a kind of male-female or the contact of the positive-positive and the capturing element of closing device, especially
Being a kind of hook or a kind of mushroom, this capturing element includes axle section and catching portion, and axle section is transverse to base band
Axis extends, and catching portion highlights laterally from axle section, it is characterised in that at least catching portion is big by having at 25 DEG C
In 1000MPa, the heat of the flexural modulus (flexural modulus) of especially greater than 1200MPa, particularly greater than 1500MPa
Thermoplastic plastic is made, and hook element is by molding, and especially injection mo(u)lding (injection molding) produces, and works as drafting
When the thermogram of capturing element, i.e. when carrying out differential scanning calorimetry (differential scanning
Calorimetry), time, notice when heating up first and do not exist near glass transition or there's almost no lax enthalpy
(relaxation enthalpy)。
Preferably, axle section is also had more than 1000MPa by 25 DEG C, especially greater than 1200MPa, the most greatly
Thermoplastic in the flexural modulus of 1500MPa is made, and is especially made up of the material identical with catching portion.
Preferred embodiment, thermoplastic is unbodied or essentially amorphous material to one according to the present invention
Material.
Preferably, this material has the flexural modulus more than 1500MPa at 25 DEG C.
Capturing ability that is according to the invention, it is thus possible to first by high rigidity, the most unbodied, that had
Thermoplastic use relate to by injection or peel off the demoulding molding step manufacture capturing element, this is particularly conducive to greatly
The production of scale.
Preferred embodiment, unbodied thermoplastic includes ABS (acrylonitrile butadiene to one according to the present invention
Styrene), PC (Merlon), PVC (polrvinyl chloride), PEI (Polyetherimide), PES (polyether sulfone), PMMA (poly-methyl-prop
E pioic acid methyl ester), PA (polyamide) 6,6 and/or PS (polystyrene).
One according to the present invention preferred embodiment, capturing element have the shape of mushroom, especially head around
360 ° of ground of axle section highlight laterally from axle section.
Especially, according to the one of the present invention preferred embodiment, catching portion is at the angle of at least three angular separation
(angular sectors) highlights laterally from axle section in sector.
Preferably, not the existing or there's almost no corresponding to the ratio less than or equal to 1J/g on DSC curve of lax enthalpy
Lax enthalpy (specific relaxation enthalpy), is from the region of Tg to Tg-30 DEG C of scope than lax enthalpy
Area between heating curve and second time heating curve is divided by the ratio of the quality of sample first.
Preferably, not the existing or there's almost no corresponding in region included between Tg and Tg-30 DEG C of lax enthalpy
The peak of the curve heated up first of DSC or not existing of maximum point.
According to the present invention, unbodied material refers to the material that the crystallinity level in material is 0%.
According to the present invention, the essentially amorphous region referring to unbodied region and non-amorphous, unbodied
Region accounts for the material of the half of the volume exceeding mentioned material.Preferably, account for more than 60%, it is further preferred that exceed
70%, very preferably, more than 80%, and it is very advantageous that volume more than 95%.
Describe in the way of embodiment combines accompanying drawing now the present invention some preferred embodiment, wherein:
Fig. 1 describes the side view of a kind of hook according to the present invention；
Fig. 2 a and 2b describes side view and the plane graph of the hook element of a kind of mushroom-shaped according to the present invention；
Fig. 3 describes the plane graph of the hook element of another embodiment of the invention；
Fig. 4 describes the plane graph of the hook element according to another embodiment；
Fig. 5 A, 5B, 5C, 5D and 5E describe and are made up of ABS, PS, PA-6,6, PMMA and PC respectively according to the present invention
Capturing element is for DSC (differential scanning calorimetry) curve heated up first；
Fig. 6 A, 6B and 6C respectively describe what the method according to the prior art not carrying out the demoulding according to the present invention obtained
The curve corresponding with Fig. 5 A, 5B and 5C of element；And
Fig. 7 A and 7B is the release method using prior art respectively and the ABS hook made by the method for the present invention
Photo.
Fig. 1 describes the embodiment of a kind of hook according to the present invention.Described hook includes the wheel shaft-shape derived from base band B
Become part 1, and the head 2 prominent from axle section 1 side.
Axle section 1 extends along substantially vertical axis, i.e. axis is at a right angle with base band B.But, according to other enforcement
Mode, it is possible to consider about this direction at a right angle with base band B it is to tilt.It is divided in order to be defined on wheel shaft and capture unit
Between boundary 3, it is made up of the horizontal section parallel with base band B in Fig. 1, according to the present invention, is defined as by cross section
Parallel with the base plane B of hook portion.According to the present invention, the boundary between head and base part is defined as plane 3, super
The Pi point of the cross section going out plane 3 is located towards the farthest on the right side, and it is cross section towards outside and extends side (herein towards hook
Left-hand side in Fig. 1) the point of farthest.According to the present invention, once have determined that cross section 3, then it is contemplated that axle section
It is in the part of this cross section 3 hook below, and this hook portion is divided into the part 2 being positioned at above cross section 3.
Fig. 2 a and 2b describes the male element of a kind of mushroom-shaped according to the present invention.In fig. 2 a it can be seen that it also
Including axle section 1' and head 2', the Pi described in the figure point is the farthest in the left side from cross section 3, beyond cross section
After 3, this Pi point starts to move back to the left side in this figure.According to this embodiment, which show the symmetry rotated about vertical axis,
Institute on cross section 3 is the most all Pi point.
Fig. 2 b shows the mushroom-shaped of Fig. 2 a overlooked from top.
Fig. 3 and Fig. 4 describes different embodiments, and wherein, described hitcher has take turns duplicate with the mushroom of Fig. 2 a
Axle, and in contrast to this, from the wheel shaft across only sector, angle, prominent laterally (Fig. 3 is four angular zones to head, and Fig. 4 is triangle fan
District).
The method according to the invention advantageouslys allow for hook, such as those hooks described in figures 1-4, but more noticeable
Be, as the mushroom in Fig. 2 a, 2b, 3 and 4 is manufactured by molding, and, especially by injection mo(u)lding, despite with
The difficulty that the existence of the head that must be demolded is associated.Therefore, according to the present invention, include for manufacturing the method for these hooks,
Use the chamber of the molding supplementing the hook of definite shape to be produced or mushroom, by unbodied thermoplastic (such as PEI,
PES, PVC, polystyrene, ABS etc.) it is incorporated in the chamber of molding.
Heater is used to make the chamber of molding reach to be substantially equal to the glass transition temperature (Tg) of thermoplastic
Temperature TMolding, including the model extended from Tg-20 to-30 ° (preferably 10 to 15 °) to Tg+20 to+30 ° (preferably 10 to 15 °)
Enclose.Owing to material is than TMoldingHigher temperature TIntroduceIt is introduced into, places to reach temperature TMolding, then it is hooked in temperature TMoldingLower de-
Mould.Then hook is placed to be cooled to ambient temperature.It was found that obtained hook (is seen the enforcement of Fig. 7 B by the complete demoulding
Example), and, especially, unlike the prior art, with molding chamber complementary shape compared with, by the hook of the demoulding not by
Deformation or damage (see Fig. 7 B).Therefore produce and there is the catching portion of very hook and mushroom head is possibly realized, this mushroom head
Portion have big head thickness all hub edge peripheral side highlight, without this prominent then during the demoulding
Show the problem that small damaged by hooks is bad.
Stratie, induction system, such as use water or the fluid regulation circuit of oil, or be known in the art
Any other like system, can provide by the way of heater.
Therefore, use the method according to the invention, the hook of the above-mentioned type, particularly there is the hook of good capturing ability, with
And mushroom, the molding that can be sprayed by use or peel off is produced, and is particularly suitable for manufacturing on a large scale.
Fig. 5 A, 5B, 5C, 5D, 5E, 6A and 6B describe a kind of prove to use made according to the method for the present invention go out according to this
The method (Fig. 5 A, 5B, 5C, 5D and 5E) of the hook of invention, and, especially, it is different from prior art (Fig. 6 A and 6B), by de-
Modulo operation is the most damaged.It should be pointed out that, the method that the material of Fig. 5 D and 5E (PMMA and PC) uses prior art can not
It is demolded.
Therefore, Fig. 5 A, 5B, 5C, 5D and 5E respectively describe respectively with ABS, PS, PA-6, and 6, the root made of PMMA and PC
According to the DSC of any one hook in Fig. 1 to 4, and Fig. 6 A, 6B and Fig. 6 C respectively describes respectively by ABS, PS and PA-6,6 systems
The DSC of the hook become, it can not carry out the demoulding at a temperature of according to the purpose of the present invention.
DSC is a curve, the curve gives supply heat in thermal change instantaneous flow with obtain temperature increasing
Add, as the function of temperature.
The gross distortion that when carrying out the demoulding, capturing element suffers leaves overstrain in the material making it.In DSC,
For being positioned at the temperature range near Tg, it is desirable to provide to the heat of this material significant quantity, to eliminate this strain and to continue to heat up.
Then, this is a kind of endothermic thermal event, and sample absorbs heat, and this absorption is characterised by peak, when further heating up this peak no longer or
Almost no longer occurring, if being because not being eliminated, this strain is greatly diminished the most.
Fig. 5 A describe the curve that the hook being made up of ABS according to the present invention during heating up first is obtained, i.e. temperature with
The fixed speed of 10 DEG C/min is from 10 to 200 degrees Celsius of changes.
Can find out from Fig. 6 A, in passing through first (in the first pass), glass transition temperature and its
Obtaining a peak, the i.e. derivative at curve described in this point before near is zero, and corresponding to a local maximum (table
Levy lax enthalpy and the endothermic reaction).In contrast, according to the present invention, do not have in the region of glass transition or almost without this
The maximum point (seeing Fig. 5 A) of sample.
There's almost no of peak near glass transition or maximum point (and the depositing hardly of the enthalpy that therefore relaxes
) mean that this DSC curve is substantially straight line, and the curve being included in process first and second of especially per unit mass
The area (area) (△ H) in secondary region between the curve of (second pass) is less than 1J/g.
In the method according to the invention, before or after the material of molding is incorporated into chamber, is heated up in the chamber of molding
To the temperature (i.e. near Tg) for the demoulding.
When drawing for the temperature rise curve of DSC, and especially as in Fig. 5 A to 5E and 6A to 6C during visible curve, first
The curve of secondary intensification is depicted as the curve of thick line and second time intensification and is depicted as fine rule.The curve that second time rises is by downwards
Offset (offset), be because, owing to hook has melted once (when rising first), with device when second time rises
Contact far better, and need less energy to heat sample, thus cause this counteracting from initial point.
Therefore, relax enthalpy to calculate the ratio near peak, for the second time ascending curve be raised in advance with rise first
Curve matches.Then give in Fig. 5 A to 5E and 6A to 6C and exceed [Tg-30 °；Tg] part suitable curve, equally
Ground extends below the curve risen first with thick line, and formed closed loop, measures its surface area to calculate enthalpy.
Especially, the enthalpy that relaxes of the ratio near peak is defined as at heating curve first with in view of counteracting described above
Second time heating curve between the integration of the difference between Tg-30 ° and Tg divided by the quality of sample.The integration pair of difference
Area defined in Ying Yu, on the one hand, in the top and the bottom that are respectively two curves risen first with second time, and,
On the other hand, corresponding to the left side of the vertical line of T=Tg and T=Tg-30 ° and right side.
In fig. 5, △ H is 0.2001J/g, and in fig. 6, △ H is 1.754J/g.
In figure 5b, △ H is 0.4838J/g, and in fig. 6b, △ H is 2.2683J/g.
In figure 5 c, △ H is 0.5839J/g, and in figure 6 c, △ H is 2.188J/g.
In figure 5d, △ H is 0.6913J/g (according to prior art, do not have possible curve).
In Fig. 5 E, △ H is 0J/g (according to prior art, do not have possible curve).
Fig. 7 A describes the hook being made up according to prior art of ABS, the most impaired due to the demoulding, and in figure 7b, ABS
Hook carries out the demoulding and the most impaired according to the present invention.The two figure, for illustrating the effect of the present invention, is not intended to
Limiting the scope of present patent application, this scope is only limited by claim to specifications.Especially, it may occur however that be
Owing to carrying out the demoulding, it is slightly distorted according to the hook of the present invention, although generally speaking maintain its seizure performance but there is no perfection
Supplement its shape in chamber of molding.In order to determine a capturing element the most consistent with the present invention or with prior art phase
Unanimously, real it is important that dsc analysis rather than the simple visual analysis of this element.
The refined condition carrying out DSC is as follows:
DSC: the thermogravimetric analyzer (Perkin-Elmer Pyris) used
Atmosphere: nitrogen
Test panel (Test pan): unsealed aluminium lid
The cutting of hook: with the scalpel heartcut hook from sheet material.Substrate at them carries out cutting and need not be from sheet material
Deduct material.
The quality of sample: 6mg (+or-1mg)
The position of hook in dish: hook is kept flat in the bottom of dish, in order to have analysis of material that the bottom with dish contacts
High surface area.
Circulating temperature program:
Firing rate: 10 DEG C/min
Temperature range: 5 DEG C-225 DEG C
Temperature cycles:
1. constant temperature 2 minutes at 5 DEG C
2. it is heated to 200 DEG C with 10 DEG C/min from 5 DEG C
3. constant temperature 2 minutes at 200 DEG C
4. it is cooled to 5 DEG C with 200 DEG C/min from 200 DEG C
5. constant temperature 2 minutes at 5 DEG C
6. it is heated to 200 DEG C with 10 DEG C/min from 5 DEG C
7. constant temperature 2 minutes at 200 DEG C.
The process of result:
Tangential method is used to measure glass transition temperature (Tg).
Near Tg (endothermic peak), measure and be compared to each other two heating relaxing through (heating passes) period
Enthalpy.
As follows for measuring the refined condition of bending modulus:
Test according to standard NF EN ISO 178: the mensuration of plastics-flexural property.
The sample of (supported like a beam) is supported, with constant speed in the centre of its span as beam
Bent, until sample fracture or until deformation reached predetermined value.In this experiment, what mensuration sample was born is negative
Lotus.Have to comply with the ratio specified by this standard, i.e. l/h=20 (+/-1), wherein, l is length, and h is thickness.
Bending stress under elastic limit is calculated by following equation:
σ=(3FL)/(2bh2)
Wherein, F is the newton load under the strain () of 0.002, and L is the span in terms of millimeter (mm) arranged, and b is
The width of coupons, h is the thickness of coupons.
Then use below equation calculating bending modulus:
E=σ/.
Claims (19)
1. male-female or the positive-positive contact and a capturing element for closing device, and this capturing element includes wheel shaft portion
Dividing and catching portion, described axle section extends transverse to the axis of base band, and described catching portion is from described axle section side
Highlight to face, it is characterised in that the most described catching portion is by the thermoplastic at 25 DEG C with the flexural modulus more than 1000MPa
Property plastics make, described capturing element is produced by molded, when drawing for the thermogram of hook, i.e. when poor
When showing scanning calorimetry, notice when heating up first and do not exist near glass transition or there's almost no lax enthalpy；
Wherein, not existing or there's almost no of lax enthalpy relaxes enthalpy corresponding to the ratio less than or equal to 1J/g on DSC curve,
Described is at the heating curve first from the region of Tg to Tg-30 DEG C of scope with between second time heating curve than lax enthalpy
Area is divided by the ratio of the quality of sample.
Element the most according to claim 1, it is characterised in that the most described catching portion is more than by having at 25 DEG C
The thermoplastic of the flexural modulus of 1200MPa is made.
Element the most according to claim 2, it is characterised in that the most described catching portion is more than by having at 25 DEG C
The thermoplastic of the flexural modulus of 1500MPa is made.
Element the most according to claim 1, it is characterised in that described capturing element is produced by injection mo(u)lding.
5. according to the element described in any one in claim 1-4, it is characterised in that not the existing or deposit hardly of lax enthalpy
The peak of the curve heated up first of the DSC in region included between corresponding to Tg and Tg-30 DEG C or not depositing of maximum point
?.
6. according to the element described in any one in claim 1-4, it is characterised in that described axle section is also by 25 DEG C
The thermoplastic with the flexural modulus more than 1000MPa is made.
Element the most according to claim 6, it is characterised in that described axle section is also more than by having at 25 DEG C
The thermoplastic of the flexural modulus of 1200MPa is made.
Element the most according to claim 7, it is characterised in that described axle section is also more than by having at 25 DEG C
The thermoplastic of the flexural modulus of 1500MPa is made.
Element the most according to claim 6, it is characterised in that described axle section is by identical with described catching portion
Material is made.
10. according to the element described in any one in claim 1-4, it is characterised in that described thermoplastic is amorphous
Or essentially amorphous material.
11. elements according to claim 4, it is characterised in that described thermoplastic has at 25 DEG C and is more than
The flexural modulus of 1500MPa.
12. elements according to claim 10, it is characterised in that described unbodied thermoplastic is selected from including propylene
Nitrile butadiene styrene, Merlon, polymethyl methacrylate, polrvinyl chloride, Polyetherimide, polyether sulfone and polystyrene
Group.
13. according to the element described in any one in claim 1-4, it is characterised in that described element has the shape of mushroom.
14. elements according to claim 13, it is characterised in that described element has head and surpasses around described axle section
Cross the shape that 360 ° of ground highlight laterally from described axle section.
15. according to the element described in any one in claim 1-4, it is characterised in that described catching portion is at least three
The sector, angle of angular separation highlights laterally from described axle section.
16. 1 kinds of methods manufacturing capturing element, this capturing element includes that the axle axis transverse to base band extends from base band
Axle section and with the catching portion highlighted laterally from wheel shaft transverse to the axis direction of wheel shaft, the method includes following step
Rapid:
-offer supplements the chamber of the molding of the definite shape of capturing element；
-can the thermoplastic of molding be incorporated in the chamber of molding forma fluens；
-temperature of the thermoplastic in the intracavity portion of molding is regulated to the T being included between Tg-Δ Tg and Tg+ Δ TgMoldingValue,
Tg is the glass transition temperature of thermoplastic, and Δ Tg is equal to 30 DEG C；
-element is in this temperature TMoldingThe demoulding is carried out under value；And
-by the element of the demoulding than TMoldingPlace at a temperature of low with cooling.
17. 1 kinds of methods manufacturing capturing element, this capturing element includes that the axle axis transverse to base band extends from base band
Axle section and with the catching portion highlighted laterally from wheel shaft transverse to the axis direction of wheel shaft, the method includes following step
Rapid:
-offer supplements the chamber of the molding of the definite shape of capturing element；
-can the thermoplastic of molding be incorporated in the chamber of molding forma fluens；
-temperature of the thermoplastic in the intracavity portion of molding is regulated to the T being included between Tg-Δ Tg and Tg+ Δ TgMoldingValue,
Tg is the glass transition temperature of thermoplastic, and Δ Tg is equal to 15 DEG C；
-element is in this temperature TMoldingThe demoulding is carried out under value；And
-by the element of the demoulding than TMoldingPlace at a temperature of low with cooling.
18. according to the method described in claim 16 or 17, it is characterised in that the element of the demoulding is placed at ambient temperature with
Cooling.
19. according to the method described in claim 16 or 17, it is characterised in that the thermoplasticity that will mold with viscosity or slurry form
Plastics are incorporated in the chamber of molding.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1203217A FR2998628B1 (en) | 2012-11-28 | 2012-11-28 | MOLDING ACCELING ELEMENTS AND METHOD OF MAKING SAME |
| FR1203217 | 2012-11-28 | ||
| PCT/FR2013/000251 WO2014083245A1 (en) | 2012-11-28 | 2013-09-24 | Moulded catching elements and method for manufacturing same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104853894A CN104853894A (en) | 2015-08-19 |
| CN104853894B true CN104853894B (en) | 2016-11-30 |
Family
ID=
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5971738A (en) * | 1997-01-21 | 1999-10-26 | Velcro Industries B.V. | Continuous molding of fasteners and other features |
| US6258311B1 (en) * | 1997-08-25 | 2001-07-10 | Velcro Industries B.V. | Forming mold cavities |
| CN102421320A (en) * | 2009-05-15 | 2012-04-18 | 埃普里克公司 | Connection element for forming the male portion of an automatic fastener |
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5971738A (en) * | 1997-01-21 | 1999-10-26 | Velcro Industries B.V. | Continuous molding of fasteners and other features |
| US6258311B1 (en) * | 1997-08-25 | 2001-07-10 | Velcro Industries B.V. | Forming mold cavities |
| CN102421320A (en) * | 2009-05-15 | 2012-04-18 | 埃普里克公司 | Connection element for forming the male portion of an automatic fastener |
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